aboutsummaryrefslogtreecommitdiffstats
path: root/arch/x86/platform
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/platform')
-rw-r--r--arch/x86/platform/Makefile10
-rw-r--r--arch/x86/platform/ce4100/Makefile1
-rw-r--r--arch/x86/platform/ce4100/ce4100.c146
-rw-r--r--arch/x86/platform/ce4100/falconfalls.dts430
-rw-r--r--arch/x86/platform/efi/Makefile1
-rw-r--r--arch/x86/platform/efi/efi.c710
-rw-r--r--arch/x86/platform/efi/efi_32.c112
-rw-r--r--arch/x86/platform/efi/efi_64.c99
-rw-r--r--arch/x86/platform/efi/efi_stub_32.S123
-rw-r--r--arch/x86/platform/efi/efi_stub_64.S116
-rw-r--r--arch/x86/platform/iris/Makefile1
-rw-r--r--arch/x86/platform/iris/iris.c91
-rw-r--r--arch/x86/platform/mrst/Makefile3
-rw-r--r--arch/x86/platform/mrst/early_printk_mrst.c319
-rw-r--r--arch/x86/platform/mrst/mrst.c811
-rw-r--r--arch/x86/platform/mrst/vrtc.c159
-rw-r--r--arch/x86/platform/olpc/Makefile2
-rw-r--r--arch/x86/platform/olpc/olpc-xo1.c146
-rw-r--r--arch/x86/platform/olpc/olpc.c284
-rw-r--r--arch/x86/platform/olpc/olpc_dt.c201
-rw-r--r--arch/x86/platform/olpc/olpc_ofw.c117
-rw-r--r--arch/x86/platform/scx200/Makefile2
-rw-r--r--arch/x86/platform/scx200/scx200_32.c131
-rw-r--r--arch/x86/platform/sfi/Makefile1
-rw-r--r--arch/x86/platform/sfi/sfi.c109
-rw-r--r--arch/x86/platform/uv/Makefile1
-rw-r--r--arch/x86/platform/uv/bios_uv.c215
-rw-r--r--arch/x86/platform/uv/tlb_uv.c1857
-rw-r--r--arch/x86/platform/uv/uv_irq.c285
-rw-r--r--arch/x86/platform/uv/uv_sysfs.c76
-rw-r--r--arch/x86/platform/uv/uv_time.c429
-rw-r--r--arch/x86/platform/visws/Makefile1
-rw-r--r--arch/x86/platform/visws/visws_quirks.c608
33 files changed, 7597 insertions, 0 deletions
diff --git a/arch/x86/platform/Makefile b/arch/x86/platform/Makefile
new file mode 100644
index 000000000000..021eee91c056
--- /dev/null
+++ b/arch/x86/platform/Makefile
@@ -0,0 +1,10 @@
1# Platform specific code goes here
2obj-y += ce4100/
3obj-y += efi/
4obj-y += iris/
5obj-y += mrst/
6obj-y += olpc/
7obj-y += scx200/
8obj-y += sfi/
9obj-y += visws/
10obj-y += uv/
diff --git a/arch/x86/platform/ce4100/Makefile b/arch/x86/platform/ce4100/Makefile
new file mode 100644
index 000000000000..91fc92971d94
--- /dev/null
+++ b/arch/x86/platform/ce4100/Makefile
@@ -0,0 +1 @@
obj-$(CONFIG_X86_INTEL_CE) += ce4100.o
diff --git a/arch/x86/platform/ce4100/ce4100.c b/arch/x86/platform/ce4100/ce4100.c
new file mode 100644
index 000000000000..28071bb31db7
--- /dev/null
+++ b/arch/x86/platform/ce4100/ce4100.c
@@ -0,0 +1,146 @@
1/*
2 * Intel CE4100 platform specific setup code
3 *
4 * (C) Copyright 2010 Intel Corporation
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; version 2
9 * of the License.
10 */
11#include <linux/init.h>
12#include <linux/kernel.h>
13#include <linux/irq.h>
14#include <linux/module.h>
15#include <linux/serial_reg.h>
16#include <linux/serial_8250.h>
17
18#include <asm/ce4100.h>
19#include <asm/prom.h>
20#include <asm/setup.h>
21#include <asm/i8259.h>
22#include <asm/io.h>
23#include <asm/io_apic.h>
24
25static int ce4100_i8042_detect(void)
26{
27 return 0;
28}
29
30#ifdef CONFIG_SERIAL_8250
31
32static unsigned int mem_serial_in(struct uart_port *p, int offset)
33{
34 offset = offset << p->regshift;
35 return readl(p->membase + offset);
36}
37
38/*
39 * The UART Tx interrupts are not set under some conditions and therefore serial
40 * transmission hangs. This is a silicon issue and has not been root caused. The
41 * workaround for this silicon issue checks UART_LSR_THRE bit and UART_LSR_TEMT
42 * bit of LSR register in interrupt handler to see whether at least one of these
43 * two bits is set, if so then process the transmit request. If this workaround
44 * is not applied, then the serial transmission may hang. This workaround is for
45 * errata number 9 in Errata - B step.
46*/
47
48static unsigned int ce4100_mem_serial_in(struct uart_port *p, int offset)
49{
50 unsigned int ret, ier, lsr;
51
52 if (offset == UART_IIR) {
53 offset = offset << p->regshift;
54 ret = readl(p->membase + offset);
55 if (ret & UART_IIR_NO_INT) {
56 /* see if the TX interrupt should have really set */
57 ier = mem_serial_in(p, UART_IER);
58 /* see if the UART's XMIT interrupt is enabled */
59 if (ier & UART_IER_THRI) {
60 lsr = mem_serial_in(p, UART_LSR);
61 /* now check to see if the UART should be
62 generating an interrupt (but isn't) */
63 if (lsr & (UART_LSR_THRE | UART_LSR_TEMT))
64 ret &= ~UART_IIR_NO_INT;
65 }
66 }
67 } else
68 ret = mem_serial_in(p, offset);
69 return ret;
70}
71
72static void ce4100_mem_serial_out(struct uart_port *p, int offset, int value)
73{
74 offset = offset << p->regshift;
75 writel(value, p->membase + offset);
76}
77
78static void ce4100_serial_fixup(int port, struct uart_port *up,
79 unsigned short *capabilites)
80{
81#ifdef CONFIG_EARLY_PRINTK
82 /*
83 * Over ride the legacy port configuration that comes from
84 * asm/serial.h. Using the ioport driver then switching to the
85 * PCI memmaped driver hangs the IOAPIC
86 */
87 if (up->iotype != UPIO_MEM32) {
88 up->uartclk = 14745600;
89 up->mapbase = 0xdffe0200;
90 set_fixmap_nocache(FIX_EARLYCON_MEM_BASE,
91 up->mapbase & PAGE_MASK);
92 up->membase =
93 (void __iomem *)__fix_to_virt(FIX_EARLYCON_MEM_BASE);
94 up->membase += up->mapbase & ~PAGE_MASK;
95 up->iotype = UPIO_MEM32;
96 up->regshift = 2;
97 }
98#endif
99 up->iobase = 0;
100 up->serial_in = ce4100_mem_serial_in;
101 up->serial_out = ce4100_mem_serial_out;
102
103 *capabilites |= (1 << 12);
104}
105
106static __init void sdv_serial_fixup(void)
107{
108 serial8250_set_isa_configurator(ce4100_serial_fixup);
109}
110
111#else
112static inline void sdv_serial_fixup(void);
113#endif
114
115static void __init sdv_arch_setup(void)
116{
117 sdv_serial_fixup();
118}
119
120#ifdef CONFIG_X86_IO_APIC
121static void __cpuinit sdv_pci_init(void)
122{
123 x86_of_pci_init();
124 /* We can't set this earlier, because we need to calibrate the timer */
125 legacy_pic = &null_legacy_pic;
126}
127#endif
128
129/*
130 * CE4100 specific x86_init function overrides and early setup
131 * calls.
132 */
133void __init x86_ce4100_early_setup(void)
134{
135 x86_init.oem.arch_setup = sdv_arch_setup;
136 x86_platform.i8042_detect = ce4100_i8042_detect;
137 x86_init.resources.probe_roms = x86_init_noop;
138 x86_init.mpparse.get_smp_config = x86_init_uint_noop;
139 x86_init.mpparse.find_smp_config = x86_init_noop;
140 x86_init.pci.init = ce4100_pci_init;
141
142#ifdef CONFIG_X86_IO_APIC
143 x86_init.pci.init_irq = sdv_pci_init;
144 x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc_nocheck;
145#endif
146}
diff --git a/arch/x86/platform/ce4100/falconfalls.dts b/arch/x86/platform/ce4100/falconfalls.dts
new file mode 100644
index 000000000000..e70be38ce039
--- /dev/null
+++ b/arch/x86/platform/ce4100/falconfalls.dts
@@ -0,0 +1,430 @@
1/*
2 * CE4100 on Falcon Falls
3 *
4 * (c) Copyright 2010 Intel Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; version 2 of the License.
9 */
10/dts-v1/;
11/ {
12 model = "intel,falconfalls";
13 compatible = "intel,falconfalls";
14 #address-cells = <1>;
15 #size-cells = <1>;
16
17 cpus {
18 #address-cells = <1>;
19 #size-cells = <0>;
20
21 cpu@0 {
22 device_type = "cpu";
23 compatible = "intel,ce4100";
24 reg = <0>;
25 lapic = <&lapic0>;
26 };
27 };
28
29 soc@0 {
30 #address-cells = <1>;
31 #size-cells = <1>;
32 compatible = "intel,ce4100-cp";
33 ranges;
34
35 ioapic1: interrupt-controller@fec00000 {
36 #interrupt-cells = <2>;
37 compatible = "intel,ce4100-ioapic";
38 interrupt-controller;
39 reg = <0xfec00000 0x1000>;
40 };
41
42 timer@fed00000 {
43 compatible = "intel,ce4100-hpet";
44 reg = <0xfed00000 0x200>;
45 };
46
47 lapic0: interrupt-controller@fee00000 {
48 compatible = "intel,ce4100-lapic";
49 reg = <0xfee00000 0x1000>;
50 };
51
52 pci@3fc {
53 #address-cells = <3>;
54 #size-cells = <2>;
55 compatible = "intel,ce4100-pci", "pci";
56 device_type = "pci";
57 bus-range = <0 0>;
58 ranges = <0x2000000 0 0xbffff000 0xbffff000 0 0x1000
59 0x2000000 0 0xdffe0000 0xdffe0000 0 0x1000
60 0x0000000 0 0x0 0x0 0 0x100>;
61
62 /* Secondary IO-APIC */
63 ioapic2: interrupt-controller@0,1 {
64 #interrupt-cells = <2>;
65 compatible = "intel,ce4100-ioapic";
66 interrupt-controller;
67 reg = <0x100 0x0 0x0 0x0 0x0>;
68 assigned-addresses = <0x02000000 0x0 0xbffff000 0x0 0x1000>;
69 };
70
71 pci@1,0 {
72 #address-cells = <3>;
73 #size-cells = <2>;
74 compatible = "intel,ce4100-pci", "pci";
75 device_type = "pci";
76 bus-range = <1 1>;
77 reg = <0x0800 0x0 0x0 0x0 0x0>;
78 ranges = <0x2000000 0 0xdffe0000 0x2000000 0 0xdffe0000 0 0x1000>;
79
80 interrupt-parent = <&ioapic2>;
81
82 display@2,0 {
83 compatible = "pci8086,2e5b.2",
84 "pci8086,2e5b",
85 "pciclass038000",
86 "pciclass0380";
87
88 reg = <0x11000 0x0 0x0 0x0 0x0>;
89 interrupts = <0 1>;
90 };
91
92 multimedia@3,0 {
93 compatible = "pci8086,2e5c.2",
94 "pci8086,2e5c",
95 "pciclass048000",
96 "pciclass0480";
97
98 reg = <0x11800 0x0 0x0 0x0 0x0>;
99 interrupts = <2 1>;
100 };
101
102 multimedia@4,0 {
103 compatible = "pci8086,2e5d.2",
104 "pci8086,2e5d",
105 "pciclass048000",
106 "pciclass0480";
107
108 reg = <0x12000 0x0 0x0 0x0 0x0>;
109 interrupts = <4 1>;
110 };
111
112 multimedia@4,1 {
113 compatible = "pci8086,2e5e.2",
114 "pci8086,2e5e",
115 "pciclass048000",
116 "pciclass0480";
117
118 reg = <0x12100 0x0 0x0 0x0 0x0>;
119 interrupts = <5 1>;
120 };
121
122 sound@6,0 {
123 compatible = "pci8086,2e5f.2",
124 "pci8086,2e5f",
125 "pciclass040100",
126 "pciclass0401";
127
128 reg = <0x13000 0x0 0x0 0x0 0x0>;
129 interrupts = <6 1>;
130 };
131
132 sound@6,1 {
133 compatible = "pci8086,2e5f.2",
134 "pci8086,2e5f",
135 "pciclass040100",
136 "pciclass0401";
137
138 reg = <0x13100 0x0 0x0 0x0 0x0>;
139 interrupts = <7 1>;
140 };
141
142 sound@6,2 {
143 compatible = "pci8086,2e60.2",
144 "pci8086,2e60",
145 "pciclass040100",
146 "pciclass0401";
147
148 reg = <0x13200 0x0 0x0 0x0 0x0>;
149 interrupts = <8 1>;
150 };
151
152 display@8,0 {
153 compatible = "pci8086,2e61.2",
154 "pci8086,2e61",
155 "pciclass038000",
156 "pciclass0380";
157
158 reg = <0x14000 0x0 0x0 0x0 0x0>;
159 interrupts = <9 1>;
160 };
161
162 display@8,1 {
163 compatible = "pci8086,2e62.2",
164 "pci8086,2e62",
165 "pciclass038000",
166 "pciclass0380";
167
168 reg = <0x14100 0x0 0x0 0x0 0x0>;
169 interrupts = <10 1>;
170 };
171
172 multimedia@8,2 {
173 compatible = "pci8086,2e63.2",
174 "pci8086,2e63",
175 "pciclass048000",
176 "pciclass0480";
177
178 reg = <0x14200 0x0 0x0 0x0 0x0>;
179 interrupts = <11 1>;
180 };
181
182 entertainment-encryption@9,0 {
183 compatible = "pci8086,2e64.2",
184 "pci8086,2e64",
185 "pciclass101000",
186 "pciclass1010";
187
188 reg = <0x14800 0x0 0x0 0x0 0x0>;
189 interrupts = <12 1>;
190 };
191
192 localbus@a,0 {
193 compatible = "pci8086,2e65.2",
194 "pci8086,2e65",
195 "pciclassff0000",
196 "pciclassff00";
197
198 reg = <0x15000 0x0 0x0 0x0 0x0>;
199 };
200
201 serial@b,0 {
202 compatible = "pci8086,2e66.2",
203 "pci8086,2e66",
204 "pciclass070003",
205 "pciclass0700";
206
207 reg = <0x15800 0x0 0x0 0x0 0x0>;
208 interrupts = <14 1>;
209 };
210
211 gpio@b,1 {
212 compatible = "pci8086,2e67.2",
213 "pci8086,2e67",
214 "pciclassff0000",
215 "pciclassff00";
216
217 #gpio-cells = <2>;
218 reg = <0x15900 0x0 0x0 0x0 0x0>;
219 interrupts = <15 1>;
220 gpio-controller;
221 };
222
223 i2c-controller@b,2 {
224 #address-cells = <2>;
225 #size-cells = <1>;
226 compatible = "pci8086,2e68.2",
227 "pci8086,2e68",
228 "pciclass,ff0000",
229 "pciclass,ff00";
230
231 reg = <0x15a00 0x0 0x0 0x0 0x0>;
232 interrupts = <16 1>;
233 ranges = <0 0 0x02000000 0 0xdffe0500 0x100
234 1 0 0x02000000 0 0xdffe0600 0x100
235 2 0 0x02000000 0 0xdffe0700 0x100>;
236
237 i2c@0 {
238 #address-cells = <1>;
239 #size-cells = <0>;
240 compatible = "intel,ce4100-i2c-controller";
241 reg = <0 0 0x100>;
242 };
243
244 i2c@1 {
245 #address-cells = <1>;
246 #size-cells = <0>;
247 compatible = "intel,ce4100-i2c-controller";
248 reg = <1 0 0x100>;
249
250 gpio@26 {
251 #gpio-cells = <2>;
252 compatible = "ti,pcf8575";
253 reg = <0x26>;
254 gpio-controller;
255 };
256 };
257
258 i2c@2 {
259 #address-cells = <1>;
260 #size-cells = <0>;
261 compatible = "intel,ce4100-i2c-controller";
262 reg = <2 0 0x100>;
263
264 gpio@26 {
265 #gpio-cells = <2>;
266 compatible = "ti,pcf8575";
267 reg = <0x26>;
268 gpio-controller;
269 };
270 };
271 };
272
273 smard-card@b,3 {
274 compatible = "pci8086,2e69.2",
275 "pci8086,2e69",
276 "pciclass070500",
277 "pciclass0705";
278
279 reg = <0x15b00 0x0 0x0 0x0 0x0>;
280 interrupts = <15 1>;
281 };
282
283 spi-controller@b,4 {
284 #address-cells = <1>;
285 #size-cells = <0>;
286 compatible =
287 "pci8086,2e6a.2",
288 "pci8086,2e6a",
289 "pciclass,ff0000",
290 "pciclass,ff00";
291
292 reg = <0x15c00 0x0 0x0 0x0 0x0>;
293 interrupts = <15 1>;
294
295 dac@0 {
296 compatible = "ti,pcm1755";
297 reg = <0>;
298 spi-max-frequency = <115200>;
299 };
300
301 dac@1 {
302 compatible = "ti,pcm1609a";
303 reg = <1>;
304 spi-max-frequency = <115200>;
305 };
306
307 eeprom@2 {
308 compatible = "atmel,at93c46";
309 reg = <2>;
310 spi-max-frequency = <115200>;
311 };
312 };
313
314 multimedia@b,7 {
315 compatible = "pci8086,2e6d.2",
316 "pci8086,2e6d",
317 "pciclassff0000",
318 "pciclassff00";
319
320 reg = <0x15f00 0x0 0x0 0x0 0x0>;
321 };
322
323 ethernet@c,0 {
324 compatible = "pci8086,2e6e.2",
325 "pci8086,2e6e",
326 "pciclass020000",
327 "pciclass0200";
328
329 reg = <0x16000 0x0 0x0 0x0 0x0>;
330 interrupts = <21 1>;
331 };
332
333 clock@c,1 {
334 compatible = "pci8086,2e6f.2",
335 "pci8086,2e6f",
336 "pciclassff0000",
337 "pciclassff00";
338
339 reg = <0x16100 0x0 0x0 0x0 0x0>;
340 interrupts = <3 1>;
341 };
342
343 usb@d,0 {
344 compatible = "pci8086,2e70.2",
345 "pci8086,2e70",
346 "pciclass0c0320",
347 "pciclass0c03";
348
349 reg = <0x16800 0x0 0x0 0x0 0x0>;
350 interrupts = <22 1>;
351 };
352
353 usb@d,1 {
354 compatible = "pci8086,2e70.2",
355 "pci8086,2e70",
356 "pciclass0c0320",
357 "pciclass0c03";
358
359 reg = <0x16900 0x0 0x0 0x0 0x0>;
360 interrupts = <22 1>;
361 };
362
363 sata@e,0 {
364 compatible = "pci8086,2e71.0",
365 "pci8086,2e71",
366 "pciclass010601",
367 "pciclass0106";
368
369 reg = <0x17000 0x0 0x0 0x0 0x0>;
370 interrupts = <23 1>;
371 };
372
373 flash@f,0 {
374 compatible = "pci8086,701.1",
375 "pci8086,701",
376 "pciclass050100",
377 "pciclass0501";
378
379 reg = <0x17800 0x0 0x0 0x0 0x0>;
380 interrupts = <13 1>;
381 };
382
383 entertainment-encryption@10,0 {
384 compatible = "pci8086,702.1",
385 "pci8086,702",
386 "pciclass101000",
387 "pciclass1010";
388
389 reg = <0x18000 0x0 0x0 0x0 0x0>;
390 };
391
392 co-processor@11,0 {
393 compatible = "pci8086,703.1",
394 "pci8086,703",
395 "pciclass0b4000",
396 "pciclass0b40";
397
398 reg = <0x18800 0x0 0x0 0x0 0x0>;
399 interrupts = <1 1>;
400 };
401
402 multimedia@12,0 {
403 compatible = "pci8086,704.0",
404 "pci8086,704",
405 "pciclass048000",
406 "pciclass0480";
407
408 reg = <0x19000 0x0 0x0 0x0 0x0>;
409 };
410 };
411
412 isa@1f,0 {
413 #address-cells = <2>;
414 #size-cells = <1>;
415 compatible = "isa";
416 reg = <0xf800 0x0 0x0 0x0 0x0>;
417 ranges = <1 0 0 0 0 0x100>;
418
419 rtc@70 {
420 compatible = "intel,ce4100-rtc", "motorola,mc146818";
421 interrupts = <8 3>;
422 interrupt-parent = <&ioapic1>;
423 ctrl-reg = <2>;
424 freq-reg = <0x26>;
425 reg = <1 0x70 2>;
426 };
427 };
428 };
429 };
430};
diff --git a/arch/x86/platform/efi/Makefile b/arch/x86/platform/efi/Makefile
new file mode 100644
index 000000000000..73b8be0f3675
--- /dev/null
+++ b/arch/x86/platform/efi/Makefile
@@ -0,0 +1 @@
obj-$(CONFIG_EFI) += efi.o efi_$(BITS).o efi_stub_$(BITS).o
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
new file mode 100644
index 000000000000..899e393d8e73
--- /dev/null
+++ b/arch/x86/platform/efi/efi.c
@@ -0,0 +1,710 @@
1/*
2 * Common EFI (Extensible Firmware Interface) support functions
3 * Based on Extensible Firmware Interface Specification version 1.0
4 *
5 * Copyright (C) 1999 VA Linux Systems
6 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
7 * Copyright (C) 1999-2002 Hewlett-Packard Co.
8 * David Mosberger-Tang <davidm@hpl.hp.com>
9 * Stephane Eranian <eranian@hpl.hp.com>
10 * Copyright (C) 2005-2008 Intel Co.
11 * Fenghua Yu <fenghua.yu@intel.com>
12 * Bibo Mao <bibo.mao@intel.com>
13 * Chandramouli Narayanan <mouli@linux.intel.com>
14 * Huang Ying <ying.huang@intel.com>
15 *
16 * Copied from efi_32.c to eliminate the duplicated code between EFI
17 * 32/64 support code. --ying 2007-10-26
18 *
19 * All EFI Runtime Services are not implemented yet as EFI only
20 * supports physical mode addressing on SoftSDV. This is to be fixed
21 * in a future version. --drummond 1999-07-20
22 *
23 * Implemented EFI runtime services and virtual mode calls. --davidm
24 *
25 * Goutham Rao: <goutham.rao@intel.com>
26 * Skip non-WB memory and ignore empty memory ranges.
27 */
28
29#include <linux/kernel.h>
30#include <linux/init.h>
31#include <linux/efi.h>
32#include <linux/bootmem.h>
33#include <linux/memblock.h>
34#include <linux/spinlock.h>
35#include <linux/uaccess.h>
36#include <linux/time.h>
37#include <linux/io.h>
38#include <linux/reboot.h>
39#include <linux/bcd.h>
40
41#include <asm/setup.h>
42#include <asm/efi.h>
43#include <asm/time.h>
44#include <asm/cacheflush.h>
45#include <asm/tlbflush.h>
46#include <asm/x86_init.h>
47
48#define EFI_DEBUG 1
49#define PFX "EFI: "
50
51int efi_enabled;
52EXPORT_SYMBOL(efi_enabled);
53
54struct efi efi;
55EXPORT_SYMBOL(efi);
56
57struct efi_memory_map memmap;
58
59static struct efi efi_phys __initdata;
60static efi_system_table_t efi_systab __initdata;
61
62static int __init setup_noefi(char *arg)
63{
64 efi_enabled = 0;
65 return 0;
66}
67early_param("noefi", setup_noefi);
68
69int add_efi_memmap;
70EXPORT_SYMBOL(add_efi_memmap);
71
72static int __init setup_add_efi_memmap(char *arg)
73{
74 add_efi_memmap = 1;
75 return 0;
76}
77early_param("add_efi_memmap", setup_add_efi_memmap);
78
79
80static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
81{
82 return efi_call_virt2(get_time, tm, tc);
83}
84
85static efi_status_t virt_efi_set_time(efi_time_t *tm)
86{
87 return efi_call_virt1(set_time, tm);
88}
89
90static efi_status_t virt_efi_get_wakeup_time(efi_bool_t *enabled,
91 efi_bool_t *pending,
92 efi_time_t *tm)
93{
94 return efi_call_virt3(get_wakeup_time,
95 enabled, pending, tm);
96}
97
98static efi_status_t virt_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
99{
100 return efi_call_virt2(set_wakeup_time,
101 enabled, tm);
102}
103
104static efi_status_t virt_efi_get_variable(efi_char16_t *name,
105 efi_guid_t *vendor,
106 u32 *attr,
107 unsigned long *data_size,
108 void *data)
109{
110 return efi_call_virt5(get_variable,
111 name, vendor, attr,
112 data_size, data);
113}
114
115static efi_status_t virt_efi_get_next_variable(unsigned long *name_size,
116 efi_char16_t *name,
117 efi_guid_t *vendor)
118{
119 return efi_call_virt3(get_next_variable,
120 name_size, name, vendor);
121}
122
123static efi_status_t virt_efi_set_variable(efi_char16_t *name,
124 efi_guid_t *vendor,
125 unsigned long attr,
126 unsigned long data_size,
127 void *data)
128{
129 return efi_call_virt5(set_variable,
130 name, vendor, attr,
131 data_size, data);
132}
133
134static efi_status_t virt_efi_get_next_high_mono_count(u32 *count)
135{
136 return efi_call_virt1(get_next_high_mono_count, count);
137}
138
139static void virt_efi_reset_system(int reset_type,
140 efi_status_t status,
141 unsigned long data_size,
142 efi_char16_t *data)
143{
144 efi_call_virt4(reset_system, reset_type, status,
145 data_size, data);
146}
147
148static efi_status_t __init phys_efi_set_virtual_address_map(
149 unsigned long memory_map_size,
150 unsigned long descriptor_size,
151 u32 descriptor_version,
152 efi_memory_desc_t *virtual_map)
153{
154 efi_status_t status;
155
156 efi_call_phys_prelog();
157 status = efi_call_phys4(efi_phys.set_virtual_address_map,
158 memory_map_size, descriptor_size,
159 descriptor_version, virtual_map);
160 efi_call_phys_epilog();
161 return status;
162}
163
164static efi_status_t __init phys_efi_get_time(efi_time_t *tm,
165 efi_time_cap_t *tc)
166{
167 efi_status_t status;
168
169 efi_call_phys_prelog();
170 status = efi_call_phys2(efi_phys.get_time, tm, tc);
171 efi_call_phys_epilog();
172 return status;
173}
174
175int efi_set_rtc_mmss(unsigned long nowtime)
176{
177 int real_seconds, real_minutes;
178 efi_status_t status;
179 efi_time_t eft;
180 efi_time_cap_t cap;
181
182 status = efi.get_time(&eft, &cap);
183 if (status != EFI_SUCCESS) {
184 printk(KERN_ERR "Oops: efitime: can't read time!\n");
185 return -1;
186 }
187
188 real_seconds = nowtime % 60;
189 real_minutes = nowtime / 60;
190 if (((abs(real_minutes - eft.minute) + 15)/30) & 1)
191 real_minutes += 30;
192 real_minutes %= 60;
193 eft.minute = real_minutes;
194 eft.second = real_seconds;
195
196 status = efi.set_time(&eft);
197 if (status != EFI_SUCCESS) {
198 printk(KERN_ERR "Oops: efitime: can't write time!\n");
199 return -1;
200 }
201 return 0;
202}
203
204unsigned long efi_get_time(void)
205{
206 efi_status_t status;
207 efi_time_t eft;
208 efi_time_cap_t cap;
209
210 status = efi.get_time(&eft, &cap);
211 if (status != EFI_SUCCESS)
212 printk(KERN_ERR "Oops: efitime: can't read time!\n");
213
214 return mktime(eft.year, eft.month, eft.day, eft.hour,
215 eft.minute, eft.second);
216}
217
218/*
219 * Tell the kernel about the EFI memory map. This might include
220 * more than the max 128 entries that can fit in the e820 legacy
221 * (zeropage) memory map.
222 */
223
224static void __init do_add_efi_memmap(void)
225{
226 void *p;
227
228 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
229 efi_memory_desc_t *md = p;
230 unsigned long long start = md->phys_addr;
231 unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
232 int e820_type;
233
234 switch (md->type) {
235 case EFI_LOADER_CODE:
236 case EFI_LOADER_DATA:
237 case EFI_BOOT_SERVICES_CODE:
238 case EFI_BOOT_SERVICES_DATA:
239 case EFI_CONVENTIONAL_MEMORY:
240 if (md->attribute & EFI_MEMORY_WB)
241 e820_type = E820_RAM;
242 else
243 e820_type = E820_RESERVED;
244 break;
245 case EFI_ACPI_RECLAIM_MEMORY:
246 e820_type = E820_ACPI;
247 break;
248 case EFI_ACPI_MEMORY_NVS:
249 e820_type = E820_NVS;
250 break;
251 case EFI_UNUSABLE_MEMORY:
252 e820_type = E820_UNUSABLE;
253 break;
254 default:
255 /*
256 * EFI_RESERVED_TYPE EFI_RUNTIME_SERVICES_CODE
257 * EFI_RUNTIME_SERVICES_DATA EFI_MEMORY_MAPPED_IO
258 * EFI_MEMORY_MAPPED_IO_PORT_SPACE EFI_PAL_CODE
259 */
260 e820_type = E820_RESERVED;
261 break;
262 }
263 e820_add_region(start, size, e820_type);
264 }
265 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
266}
267
268void __init efi_memblock_x86_reserve_range(void)
269{
270 unsigned long pmap;
271
272#ifdef CONFIG_X86_32
273 pmap = boot_params.efi_info.efi_memmap;
274#else
275 pmap = (boot_params.efi_info.efi_memmap |
276 ((__u64)boot_params.efi_info.efi_memmap_hi<<32));
277#endif
278 memmap.phys_map = (void *)pmap;
279 memmap.nr_map = boot_params.efi_info.efi_memmap_size /
280 boot_params.efi_info.efi_memdesc_size;
281 memmap.desc_version = boot_params.efi_info.efi_memdesc_version;
282 memmap.desc_size = boot_params.efi_info.efi_memdesc_size;
283 memblock_x86_reserve_range(pmap, pmap + memmap.nr_map * memmap.desc_size,
284 "EFI memmap");
285}
286
287#if EFI_DEBUG
288static void __init print_efi_memmap(void)
289{
290 efi_memory_desc_t *md;
291 void *p;
292 int i;
293
294 for (p = memmap.map, i = 0;
295 p < memmap.map_end;
296 p += memmap.desc_size, i++) {
297 md = p;
298 printk(KERN_INFO PFX "mem%02u: type=%u, attr=0x%llx, "
299 "range=[0x%016llx-0x%016llx) (%lluMB)\n",
300 i, md->type, md->attribute, md->phys_addr,
301 md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
302 (md->num_pages >> (20 - EFI_PAGE_SHIFT)));
303 }
304}
305#endif /* EFI_DEBUG */
306
307void __init efi_reserve_boot_services(void)
308{
309 void *p;
310
311 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
312 efi_memory_desc_t *md = p;
313 u64 start = md->phys_addr;
314 u64 size = md->num_pages << EFI_PAGE_SHIFT;
315
316 if (md->type != EFI_BOOT_SERVICES_CODE &&
317 md->type != EFI_BOOT_SERVICES_DATA)
318 continue;
319 /* Only reserve where possible:
320 * - Not within any already allocated areas
321 * - Not over any memory area (really needed, if above?)
322 * - Not within any part of the kernel
323 * - Not the bios reserved area
324 */
325 if ((start+size >= virt_to_phys(_text)
326 && start <= virt_to_phys(_end)) ||
327 !e820_all_mapped(start, start+size, E820_RAM) ||
328 memblock_x86_check_reserved_size(&start, &size,
329 1<<EFI_PAGE_SHIFT)) {
330 /* Could not reserve, skip it */
331 md->num_pages = 0;
332 memblock_dbg(PFX "Could not reserve boot range "
333 "[0x%010llx-0x%010llx]\n",
334 start, start+size-1);
335 } else
336 memblock_x86_reserve_range(start, start+size,
337 "EFI Boot");
338 }
339}
340
341static void __init efi_free_boot_services(void)
342{
343 void *p;
344
345 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
346 efi_memory_desc_t *md = p;
347 unsigned long long start = md->phys_addr;
348 unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
349
350 if (md->type != EFI_BOOT_SERVICES_CODE &&
351 md->type != EFI_BOOT_SERVICES_DATA)
352 continue;
353
354 /* Could not reserve boot area */
355 if (!size)
356 continue;
357
358 free_bootmem_late(start, size);
359 }
360}
361
362void __init efi_init(void)
363{
364 efi_config_table_t *config_tables;
365 efi_runtime_services_t *runtime;
366 efi_char16_t *c16;
367 char vendor[100] = "unknown";
368 int i = 0;
369 void *tmp;
370
371#ifdef CONFIG_X86_32
372 efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab;
373#else
374 efi_phys.systab = (efi_system_table_t *)
375 (boot_params.efi_info.efi_systab |
376 ((__u64)boot_params.efi_info.efi_systab_hi<<32));
377#endif
378
379 efi.systab = early_ioremap((unsigned long)efi_phys.systab,
380 sizeof(efi_system_table_t));
381 if (efi.systab == NULL)
382 printk(KERN_ERR "Couldn't map the EFI system table!\n");
383 memcpy(&efi_systab, efi.systab, sizeof(efi_system_table_t));
384 early_iounmap(efi.systab, sizeof(efi_system_table_t));
385 efi.systab = &efi_systab;
386
387 /*
388 * Verify the EFI Table
389 */
390 if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
391 printk(KERN_ERR "EFI system table signature incorrect!\n");
392 if ((efi.systab->hdr.revision >> 16) == 0)
393 printk(KERN_ERR "Warning: EFI system table version "
394 "%d.%02d, expected 1.00 or greater!\n",
395 efi.systab->hdr.revision >> 16,
396 efi.systab->hdr.revision & 0xffff);
397
398 /*
399 * Show what we know for posterity
400 */
401 c16 = tmp = early_ioremap(efi.systab->fw_vendor, 2);
402 if (c16) {
403 for (i = 0; i < sizeof(vendor) - 1 && *c16; ++i)
404 vendor[i] = *c16++;
405 vendor[i] = '\0';
406 } else
407 printk(KERN_ERR PFX "Could not map the firmware vendor!\n");
408 early_iounmap(tmp, 2);
409
410 printk(KERN_INFO "EFI v%u.%.02u by %s\n",
411 efi.systab->hdr.revision >> 16,
412 efi.systab->hdr.revision & 0xffff, vendor);
413
414 /*
415 * Let's see what config tables the firmware passed to us.
416 */
417 config_tables = early_ioremap(
418 efi.systab->tables,
419 efi.systab->nr_tables * sizeof(efi_config_table_t));
420 if (config_tables == NULL)
421 printk(KERN_ERR "Could not map EFI Configuration Table!\n");
422
423 printk(KERN_INFO);
424 for (i = 0; i < efi.systab->nr_tables; i++) {
425 if (!efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID)) {
426 efi.mps = config_tables[i].table;
427 printk(" MPS=0x%lx ", config_tables[i].table);
428 } else if (!efi_guidcmp(config_tables[i].guid,
429 ACPI_20_TABLE_GUID)) {
430 efi.acpi20 = config_tables[i].table;
431 printk(" ACPI 2.0=0x%lx ", config_tables[i].table);
432 } else if (!efi_guidcmp(config_tables[i].guid,
433 ACPI_TABLE_GUID)) {
434 efi.acpi = config_tables[i].table;
435 printk(" ACPI=0x%lx ", config_tables[i].table);
436 } else if (!efi_guidcmp(config_tables[i].guid,
437 SMBIOS_TABLE_GUID)) {
438 efi.smbios = config_tables[i].table;
439 printk(" SMBIOS=0x%lx ", config_tables[i].table);
440#ifdef CONFIG_X86_UV
441 } else if (!efi_guidcmp(config_tables[i].guid,
442 UV_SYSTEM_TABLE_GUID)) {
443 efi.uv_systab = config_tables[i].table;
444 printk(" UVsystab=0x%lx ", config_tables[i].table);
445#endif
446 } else if (!efi_guidcmp(config_tables[i].guid,
447 HCDP_TABLE_GUID)) {
448 efi.hcdp = config_tables[i].table;
449 printk(" HCDP=0x%lx ", config_tables[i].table);
450 } else if (!efi_guidcmp(config_tables[i].guid,
451 UGA_IO_PROTOCOL_GUID)) {
452 efi.uga = config_tables[i].table;
453 printk(" UGA=0x%lx ", config_tables[i].table);
454 }
455 }
456 printk("\n");
457 early_iounmap(config_tables,
458 efi.systab->nr_tables * sizeof(efi_config_table_t));
459
460 /*
461 * Check out the runtime services table. We need to map
462 * the runtime services table so that we can grab the physical
463 * address of several of the EFI runtime functions, needed to
464 * set the firmware into virtual mode.
465 */
466 runtime = early_ioremap((unsigned long)efi.systab->runtime,
467 sizeof(efi_runtime_services_t));
468 if (runtime != NULL) {
469 /*
470 * We will only need *early* access to the following
471 * two EFI runtime services before set_virtual_address_map
472 * is invoked.
473 */
474 efi_phys.get_time = (efi_get_time_t *)runtime->get_time;
475 efi_phys.set_virtual_address_map =
476 (efi_set_virtual_address_map_t *)
477 runtime->set_virtual_address_map;
478 /*
479 * Make efi_get_time can be called before entering
480 * virtual mode.
481 */
482 efi.get_time = phys_efi_get_time;
483 } else
484 printk(KERN_ERR "Could not map the EFI runtime service "
485 "table!\n");
486 early_iounmap(runtime, sizeof(efi_runtime_services_t));
487
488 /* Map the EFI memory map */
489 memmap.map = early_ioremap((unsigned long)memmap.phys_map,
490 memmap.nr_map * memmap.desc_size);
491 if (memmap.map == NULL)
492 printk(KERN_ERR "Could not map the EFI memory map!\n");
493 memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
494
495 if (memmap.desc_size != sizeof(efi_memory_desc_t))
496 printk(KERN_WARNING
497 "Kernel-defined memdesc doesn't match the one from EFI!\n");
498
499 if (add_efi_memmap)
500 do_add_efi_memmap();
501
502#ifdef CONFIG_X86_32
503 x86_platform.get_wallclock = efi_get_time;
504 x86_platform.set_wallclock = efi_set_rtc_mmss;
505#endif
506
507#if EFI_DEBUG
508 print_efi_memmap();
509#endif
510}
511
512void __init efi_set_executable(efi_memory_desc_t *md, bool executable)
513{
514 u64 addr, npages;
515
516 addr = md->virt_addr;
517 npages = md->num_pages;
518
519 memrange_efi_to_native(&addr, &npages);
520
521 if (executable)
522 set_memory_x(addr, npages);
523 else
524 set_memory_nx(addr, npages);
525}
526
527static void __init runtime_code_page_mkexec(void)
528{
529 efi_memory_desc_t *md;
530 void *p;
531
532 /* Make EFI runtime service code area executable */
533 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
534 md = p;
535
536 if (md->type != EFI_RUNTIME_SERVICES_CODE)
537 continue;
538
539 efi_set_executable(md, true);
540 }
541}
542
543/*
544 * This function will switch the EFI runtime services to virtual mode.
545 * Essentially, look through the EFI memmap and map every region that
546 * has the runtime attribute bit set in its memory descriptor and update
547 * that memory descriptor with the virtual address obtained from ioremap().
548 * This enables the runtime services to be called without having to
549 * thunk back into physical mode for every invocation.
550 */
551void __init efi_enter_virtual_mode(void)
552{
553 efi_memory_desc_t *md, *prev_md = NULL;
554 efi_status_t status;
555 unsigned long size;
556 u64 end, systab, addr, npages, end_pfn;
557 void *p, *va, *new_memmap = NULL;
558 int count = 0;
559
560 efi.systab = NULL;
561
562 /* Merge contiguous regions of the same type and attribute */
563 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
564 u64 prev_size;
565 md = p;
566
567 if (!prev_md) {
568 prev_md = md;
569 continue;
570 }
571
572 if (prev_md->type != md->type ||
573 prev_md->attribute != md->attribute) {
574 prev_md = md;
575 continue;
576 }
577
578 prev_size = prev_md->num_pages << EFI_PAGE_SHIFT;
579
580 if (md->phys_addr == (prev_md->phys_addr + prev_size)) {
581 prev_md->num_pages += md->num_pages;
582 md->type = EFI_RESERVED_TYPE;
583 md->attribute = 0;
584 continue;
585 }
586 prev_md = md;
587 }
588
589 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
590 md = p;
591 if (!(md->attribute & EFI_MEMORY_RUNTIME) &&
592 md->type != EFI_BOOT_SERVICES_CODE &&
593 md->type != EFI_BOOT_SERVICES_DATA)
594 continue;
595
596 size = md->num_pages << EFI_PAGE_SHIFT;
597 end = md->phys_addr + size;
598
599 end_pfn = PFN_UP(end);
600 if (end_pfn <= max_low_pfn_mapped
601 || (end_pfn > (1UL << (32 - PAGE_SHIFT))
602 && end_pfn <= max_pfn_mapped))
603 va = __va(md->phys_addr);
604 else
605 va = efi_ioremap(md->phys_addr, size, md->type);
606
607 md->virt_addr = (u64) (unsigned long) va;
608
609 if (!va) {
610 printk(KERN_ERR PFX "ioremap of 0x%llX failed!\n",
611 (unsigned long long)md->phys_addr);
612 continue;
613 }
614
615 if (!(md->attribute & EFI_MEMORY_WB)) {
616 addr = md->virt_addr;
617 npages = md->num_pages;
618 memrange_efi_to_native(&addr, &npages);
619 set_memory_uc(addr, npages);
620 }
621
622 systab = (u64) (unsigned long) efi_phys.systab;
623 if (md->phys_addr <= systab && systab < end) {
624 systab += md->virt_addr - md->phys_addr;
625 efi.systab = (efi_system_table_t *) (unsigned long) systab;
626 }
627 new_memmap = krealloc(new_memmap,
628 (count + 1) * memmap.desc_size,
629 GFP_KERNEL);
630 memcpy(new_memmap + (count * memmap.desc_size), md,
631 memmap.desc_size);
632 count++;
633 }
634
635 BUG_ON(!efi.systab);
636
637 status = phys_efi_set_virtual_address_map(
638 memmap.desc_size * count,
639 memmap.desc_size,
640 memmap.desc_version,
641 (efi_memory_desc_t *)__pa(new_memmap));
642
643 if (status != EFI_SUCCESS) {
644 printk(KERN_ALERT "Unable to switch EFI into virtual mode "
645 "(status=%lx)!\n", status);
646 panic("EFI call to SetVirtualAddressMap() failed!");
647 }
648
649 /*
650 * Thankfully, it does seem that no runtime services other than
651 * SetVirtualAddressMap() will touch boot services code, so we can
652 * get rid of it all at this point
653 */
654 efi_free_boot_services();
655
656 /*
657 * Now that EFI is in virtual mode, update the function
658 * pointers in the runtime service table to the new virtual addresses.
659 *
660 * Call EFI services through wrapper functions.
661 */
662 efi.get_time = virt_efi_get_time;
663 efi.set_time = virt_efi_set_time;
664 efi.get_wakeup_time = virt_efi_get_wakeup_time;
665 efi.set_wakeup_time = virt_efi_set_wakeup_time;
666 efi.get_variable = virt_efi_get_variable;
667 efi.get_next_variable = virt_efi_get_next_variable;
668 efi.set_variable = virt_efi_set_variable;
669 efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count;
670 efi.reset_system = virt_efi_reset_system;
671 efi.set_virtual_address_map = NULL;
672 if (__supported_pte_mask & _PAGE_NX)
673 runtime_code_page_mkexec();
674 early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);
675 memmap.map = NULL;
676 kfree(new_memmap);
677}
678
679/*
680 * Convenience functions to obtain memory types and attributes
681 */
682u32 efi_mem_type(unsigned long phys_addr)
683{
684 efi_memory_desc_t *md;
685 void *p;
686
687 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
688 md = p;
689 if ((md->phys_addr <= phys_addr) &&
690 (phys_addr < (md->phys_addr +
691 (md->num_pages << EFI_PAGE_SHIFT))))
692 return md->type;
693 }
694 return 0;
695}
696
697u64 efi_mem_attributes(unsigned long phys_addr)
698{
699 efi_memory_desc_t *md;
700 void *p;
701
702 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
703 md = p;
704 if ((md->phys_addr <= phys_addr) &&
705 (phys_addr < (md->phys_addr +
706 (md->num_pages << EFI_PAGE_SHIFT))))
707 return md->attribute;
708 }
709 return 0;
710}
diff --git a/arch/x86/platform/efi/efi_32.c b/arch/x86/platform/efi/efi_32.c
new file mode 100644
index 000000000000..5cab48ee61a4
--- /dev/null
+++ b/arch/x86/platform/efi/efi_32.c
@@ -0,0 +1,112 @@
1/*
2 * Extensible Firmware Interface
3 *
4 * Based on Extensible Firmware Interface Specification version 1.0
5 *
6 * Copyright (C) 1999 VA Linux Systems
7 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
8 * Copyright (C) 1999-2002 Hewlett-Packard Co.
9 * David Mosberger-Tang <davidm@hpl.hp.com>
10 * Stephane Eranian <eranian@hpl.hp.com>
11 *
12 * All EFI Runtime Services are not implemented yet as EFI only
13 * supports physical mode addressing on SoftSDV. This is to be fixed
14 * in a future version. --drummond 1999-07-20
15 *
16 * Implemented EFI runtime services and virtual mode calls. --davidm
17 *
18 * Goutham Rao: <goutham.rao@intel.com>
19 * Skip non-WB memory and ignore empty memory ranges.
20 */
21
22#include <linux/kernel.h>
23#include <linux/types.h>
24#include <linux/ioport.h>
25#include <linux/efi.h>
26
27#include <asm/io.h>
28#include <asm/page.h>
29#include <asm/pgtable.h>
30#include <asm/tlbflush.h>
31#include <asm/efi.h>
32
33/*
34 * To make EFI call EFI runtime service in physical addressing mode we need
35 * prelog/epilog before/after the invocation to disable interrupt, to
36 * claim EFI runtime service handler exclusively and to duplicate a memory in
37 * low memory space say 0 - 3G.
38 */
39
40static unsigned long efi_rt_eflags;
41static pgd_t efi_bak_pg_dir_pointer[2];
42
43void efi_call_phys_prelog(void)
44{
45 unsigned long cr4;
46 unsigned long temp;
47 struct desc_ptr gdt_descr;
48
49 local_irq_save(efi_rt_eflags);
50
51 /*
52 * If I don't have PAE, I should just duplicate two entries in page
53 * directory. If I have PAE, I just need to duplicate one entry in
54 * page directory.
55 */
56 cr4 = read_cr4_safe();
57
58 if (cr4 & X86_CR4_PAE) {
59 efi_bak_pg_dir_pointer[0].pgd =
60 swapper_pg_dir[pgd_index(0)].pgd;
61 swapper_pg_dir[0].pgd =
62 swapper_pg_dir[pgd_index(PAGE_OFFSET)].pgd;
63 } else {
64 efi_bak_pg_dir_pointer[0].pgd =
65 swapper_pg_dir[pgd_index(0)].pgd;
66 efi_bak_pg_dir_pointer[1].pgd =
67 swapper_pg_dir[pgd_index(0x400000)].pgd;
68 swapper_pg_dir[pgd_index(0)].pgd =
69 swapper_pg_dir[pgd_index(PAGE_OFFSET)].pgd;
70 temp = PAGE_OFFSET + 0x400000;
71 swapper_pg_dir[pgd_index(0x400000)].pgd =
72 swapper_pg_dir[pgd_index(temp)].pgd;
73 }
74
75 /*
76 * After the lock is released, the original page table is restored.
77 */
78 __flush_tlb_all();
79
80 gdt_descr.address = __pa(get_cpu_gdt_table(0));
81 gdt_descr.size = GDT_SIZE - 1;
82 load_gdt(&gdt_descr);
83}
84
85void efi_call_phys_epilog(void)
86{
87 unsigned long cr4;
88 struct desc_ptr gdt_descr;
89
90 gdt_descr.address = (unsigned long)get_cpu_gdt_table(0);
91 gdt_descr.size = GDT_SIZE - 1;
92 load_gdt(&gdt_descr);
93
94 cr4 = read_cr4_safe();
95
96 if (cr4 & X86_CR4_PAE) {
97 swapper_pg_dir[pgd_index(0)].pgd =
98 efi_bak_pg_dir_pointer[0].pgd;
99 } else {
100 swapper_pg_dir[pgd_index(0)].pgd =
101 efi_bak_pg_dir_pointer[0].pgd;
102 swapper_pg_dir[pgd_index(0x400000)].pgd =
103 efi_bak_pg_dir_pointer[1].pgd;
104 }
105
106 /*
107 * After the lock is released, the original page table is restored.
108 */
109 __flush_tlb_all();
110
111 local_irq_restore(efi_rt_eflags);
112}
diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c
new file mode 100644
index 000000000000..ac3aa54e2654
--- /dev/null
+++ b/arch/x86/platform/efi/efi_64.c
@@ -0,0 +1,99 @@
1/*
2 * x86_64 specific EFI support functions
3 * Based on Extensible Firmware Interface Specification version 1.0
4 *
5 * Copyright (C) 2005-2008 Intel Co.
6 * Fenghua Yu <fenghua.yu@intel.com>
7 * Bibo Mao <bibo.mao@intel.com>
8 * Chandramouli Narayanan <mouli@linux.intel.com>
9 * Huang Ying <ying.huang@intel.com>
10 *
11 * Code to convert EFI to E820 map has been implemented in elilo bootloader
12 * based on a EFI patch by Edgar Hucek. Based on the E820 map, the page table
13 * is setup appropriately for EFI runtime code.
14 * - mouli 06/14/2007.
15 *
16 */
17
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/mm.h>
21#include <linux/types.h>
22#include <linux/spinlock.h>
23#include <linux/bootmem.h>
24#include <linux/ioport.h>
25#include <linux/module.h>
26#include <linux/efi.h>
27#include <linux/uaccess.h>
28#include <linux/io.h>
29#include <linux/reboot.h>
30
31#include <asm/setup.h>
32#include <asm/page.h>
33#include <asm/e820.h>
34#include <asm/pgtable.h>
35#include <asm/tlbflush.h>
36#include <asm/proto.h>
37#include <asm/efi.h>
38#include <asm/cacheflush.h>
39#include <asm/fixmap.h>
40
41static pgd_t save_pgd __initdata;
42static unsigned long efi_flags __initdata;
43
44static void __init early_code_mapping_set_exec(int executable)
45{
46 efi_memory_desc_t *md;
47 void *p;
48
49 if (!(__supported_pte_mask & _PAGE_NX))
50 return;
51
52 /* Make EFI service code area executable */
53 for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
54 md = p;
55 if (md->type == EFI_RUNTIME_SERVICES_CODE ||
56 md->type == EFI_BOOT_SERVICES_CODE)
57 efi_set_executable(md, executable);
58 }
59}
60
61void __init efi_call_phys_prelog(void)
62{
63 unsigned long vaddress;
64
65 early_code_mapping_set_exec(1);
66 local_irq_save(efi_flags);
67 vaddress = (unsigned long)__va(0x0UL);
68 save_pgd = *pgd_offset_k(0x0UL);
69 set_pgd(pgd_offset_k(0x0UL), *pgd_offset_k(vaddress));
70 __flush_tlb_all();
71}
72
73void __init efi_call_phys_epilog(void)
74{
75 /*
76 * After the lock is released, the original page table is restored.
77 */
78 set_pgd(pgd_offset_k(0x0UL), save_pgd);
79 __flush_tlb_all();
80 local_irq_restore(efi_flags);
81 early_code_mapping_set_exec(0);
82}
83
84void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size,
85 u32 type)
86{
87 unsigned long last_map_pfn;
88
89 if (type == EFI_MEMORY_MAPPED_IO)
90 return ioremap(phys_addr, size);
91
92 last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size);
93 if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size) {
94 unsigned long top = last_map_pfn << PAGE_SHIFT;
95 efi_ioremap(top, size - (top - phys_addr), type);
96 }
97
98 return (void __iomem *)__va(phys_addr);
99}
diff --git a/arch/x86/platform/efi/efi_stub_32.S b/arch/x86/platform/efi/efi_stub_32.S
new file mode 100644
index 000000000000..fbe66e626c09
--- /dev/null
+++ b/arch/x86/platform/efi/efi_stub_32.S
@@ -0,0 +1,123 @@
1/*
2 * EFI call stub for IA32.
3 *
4 * This stub allows us to make EFI calls in physical mode with interrupts
5 * turned off.
6 */
7
8#include <linux/linkage.h>
9#include <asm/page_types.h>
10
11/*
12 * efi_call_phys(void *, ...) is a function with variable parameters.
13 * All the callers of this function assure that all the parameters are 4-bytes.
14 */
15
16/*
17 * In gcc calling convention, EBX, ESP, EBP, ESI and EDI are all callee save.
18 * So we'd better save all of them at the beginning of this function and restore
19 * at the end no matter how many we use, because we can not assure EFI runtime
20 * service functions will comply with gcc calling convention, too.
21 */
22
23.text
24ENTRY(efi_call_phys)
25 /*
26 * 0. The function can only be called in Linux kernel. So CS has been
27 * set to 0x0010, DS and SS have been set to 0x0018. In EFI, I found
28 * the values of these registers are the same. And, the corresponding
29 * GDT entries are identical. So I will do nothing about segment reg
30 * and GDT, but change GDT base register in prelog and epilog.
31 */
32
33 /*
34 * 1. Now I am running with EIP = <physical address> + PAGE_OFFSET.
35 * But to make it smoothly switch from virtual mode to flat mode.
36 * The mapping of lower virtual memory has been created in prelog and
37 * epilog.
38 */
39 movl $1f, %edx
40 subl $__PAGE_OFFSET, %edx
41 jmp *%edx
421:
43
44 /*
45 * 2. Now on the top of stack is the return
46 * address in the caller of efi_call_phys(), then parameter 1,
47 * parameter 2, ..., param n. To make things easy, we save the return
48 * address of efi_call_phys in a global variable.
49 */
50 popl %edx
51 movl %edx, saved_return_addr
52 /* get the function pointer into ECX*/
53 popl %ecx
54 movl %ecx, efi_rt_function_ptr
55 movl $2f, %edx
56 subl $__PAGE_OFFSET, %edx
57 pushl %edx
58
59 /*
60 * 3. Clear PG bit in %CR0.
61 */
62 movl %cr0, %edx
63 andl $0x7fffffff, %edx
64 movl %edx, %cr0
65 jmp 1f
661:
67
68 /*
69 * 4. Adjust stack pointer.
70 */
71 subl $__PAGE_OFFSET, %esp
72
73 /*
74 * 5. Call the physical function.
75 */
76 jmp *%ecx
77
782:
79 /*
80 * 6. After EFI runtime service returns, control will return to
81 * following instruction. We'd better readjust stack pointer first.
82 */
83 addl $__PAGE_OFFSET, %esp
84
85 /*
86 * 7. Restore PG bit
87 */
88 movl %cr0, %edx
89 orl $0x80000000, %edx
90 movl %edx, %cr0
91 jmp 1f
921:
93 /*
94 * 8. Now restore the virtual mode from flat mode by
95 * adding EIP with PAGE_OFFSET.
96 */
97 movl $1f, %edx
98 jmp *%edx
991:
100
101 /*
102 * 9. Balance the stack. And because EAX contain the return value,
103 * we'd better not clobber it.
104 */
105 leal efi_rt_function_ptr, %edx
106 movl (%edx), %ecx
107 pushl %ecx
108
109 /*
110 * 10. Push the saved return address onto the stack and return.
111 */
112 leal saved_return_addr, %edx
113 movl (%edx), %ecx
114 pushl %ecx
115 ret
116ENDPROC(efi_call_phys)
117.previous
118
119.data
120saved_return_addr:
121 .long 0
122efi_rt_function_ptr:
123 .long 0
diff --git a/arch/x86/platform/efi/efi_stub_64.S b/arch/x86/platform/efi/efi_stub_64.S
new file mode 100644
index 000000000000..4c07ccab8146
--- /dev/null
+++ b/arch/x86/platform/efi/efi_stub_64.S
@@ -0,0 +1,116 @@
1/*
2 * Function calling ABI conversion from Linux to EFI for x86_64
3 *
4 * Copyright (C) 2007 Intel Corp
5 * Bibo Mao <bibo.mao@intel.com>
6 * Huang Ying <ying.huang@intel.com>
7 */
8
9#include <linux/linkage.h>
10
11#define SAVE_XMM \
12 mov %rsp, %rax; \
13 subq $0x70, %rsp; \
14 and $~0xf, %rsp; \
15 mov %rax, (%rsp); \
16 mov %cr0, %rax; \
17 clts; \
18 mov %rax, 0x8(%rsp); \
19 movaps %xmm0, 0x60(%rsp); \
20 movaps %xmm1, 0x50(%rsp); \
21 movaps %xmm2, 0x40(%rsp); \
22 movaps %xmm3, 0x30(%rsp); \
23 movaps %xmm4, 0x20(%rsp); \
24 movaps %xmm5, 0x10(%rsp)
25
26#define RESTORE_XMM \
27 movaps 0x60(%rsp), %xmm0; \
28 movaps 0x50(%rsp), %xmm1; \
29 movaps 0x40(%rsp), %xmm2; \
30 movaps 0x30(%rsp), %xmm3; \
31 movaps 0x20(%rsp), %xmm4; \
32 movaps 0x10(%rsp), %xmm5; \
33 mov 0x8(%rsp), %rsi; \
34 mov %rsi, %cr0; \
35 mov (%rsp), %rsp
36
37ENTRY(efi_call0)
38 SAVE_XMM
39 subq $32, %rsp
40 call *%rdi
41 addq $32, %rsp
42 RESTORE_XMM
43 ret
44ENDPROC(efi_call0)
45
46ENTRY(efi_call1)
47 SAVE_XMM
48 subq $32, %rsp
49 mov %rsi, %rcx
50 call *%rdi
51 addq $32, %rsp
52 RESTORE_XMM
53 ret
54ENDPROC(efi_call1)
55
56ENTRY(efi_call2)
57 SAVE_XMM
58 subq $32, %rsp
59 mov %rsi, %rcx
60 call *%rdi
61 addq $32, %rsp
62 RESTORE_XMM
63 ret
64ENDPROC(efi_call2)
65
66ENTRY(efi_call3)
67 SAVE_XMM
68 subq $32, %rsp
69 mov %rcx, %r8
70 mov %rsi, %rcx
71 call *%rdi
72 addq $32, %rsp
73 RESTORE_XMM
74 ret
75ENDPROC(efi_call3)
76
77ENTRY(efi_call4)
78 SAVE_XMM
79 subq $32, %rsp
80 mov %r8, %r9
81 mov %rcx, %r8
82 mov %rsi, %rcx
83 call *%rdi
84 addq $32, %rsp
85 RESTORE_XMM
86 ret
87ENDPROC(efi_call4)
88
89ENTRY(efi_call5)
90 SAVE_XMM
91 subq $48, %rsp
92 mov %r9, 32(%rsp)
93 mov %r8, %r9
94 mov %rcx, %r8
95 mov %rsi, %rcx
96 call *%rdi
97 addq $48, %rsp
98 RESTORE_XMM
99 ret
100ENDPROC(efi_call5)
101
102ENTRY(efi_call6)
103 SAVE_XMM
104 mov (%rsp), %rax
105 mov 8(%rax), %rax
106 subq $48, %rsp
107 mov %r9, 32(%rsp)
108 mov %rax, 40(%rsp)
109 mov %r8, %r9
110 mov %rcx, %r8
111 mov %rsi, %rcx
112 call *%rdi
113 addq $48, %rsp
114 RESTORE_XMM
115 ret
116ENDPROC(efi_call6)
diff --git a/arch/x86/platform/iris/Makefile b/arch/x86/platform/iris/Makefile
new file mode 100644
index 000000000000..db921983a102
--- /dev/null
+++ b/arch/x86/platform/iris/Makefile
@@ -0,0 +1 @@
obj-$(CONFIG_X86_32_IRIS) += iris.o
diff --git a/arch/x86/platform/iris/iris.c b/arch/x86/platform/iris/iris.c
new file mode 100644
index 000000000000..1ba7f5ed8c9b
--- /dev/null
+++ b/arch/x86/platform/iris/iris.c
@@ -0,0 +1,91 @@
1/*
2 * Eurobraille/Iris power off support.
3 *
4 * Eurobraille's Iris machine is a PC with no APM or ACPI support.
5 * It is shutdown by a special I/O sequence which this module provides.
6 *
7 * Copyright (C) Shérab <Sebastien.Hinderer@ens-lyon.org>
8 *
9 * This program is free software ; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation ; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY ; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with the program ; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24#include <linux/moduleparam.h>
25#include <linux/module.h>
26#include <linux/kernel.h>
27#include <linux/errno.h>
28#include <linux/delay.h>
29#include <linux/init.h>
30#include <linux/pm.h>
31#include <asm/io.h>
32
33#define IRIS_GIO_BASE 0x340
34#define IRIS_GIO_INPUT IRIS_GIO_BASE
35#define IRIS_GIO_OUTPUT (IRIS_GIO_BASE + 1)
36#define IRIS_GIO_PULSE 0x80 /* First byte to send */
37#define IRIS_GIO_REST 0x00 /* Second byte to send */
38#define IRIS_GIO_NODEV 0xff /* Likely not an Iris */
39
40MODULE_LICENSE("GPL");
41MODULE_AUTHOR("Sébastien Hinderer <Sebastien.Hinderer@ens-lyon.org>");
42MODULE_DESCRIPTION("A power_off handler for Iris devices from EuroBraille");
43MODULE_SUPPORTED_DEVICE("Eurobraille/Iris");
44
45static int force;
46
47module_param(force, bool, 0);
48MODULE_PARM_DESC(force, "Set to one to force poweroff handler installation.");
49
50static void (*old_pm_power_off)(void);
51
52static void iris_power_off(void)
53{
54 outb(IRIS_GIO_PULSE, IRIS_GIO_OUTPUT);
55 msleep(850);
56 outb(IRIS_GIO_REST, IRIS_GIO_OUTPUT);
57}
58
59/*
60 * Before installing the power_off handler, try to make sure the OS is
61 * running on an Iris. Since Iris does not support DMI, this is done
62 * by reading its input port and seeing whether the read value is
63 * meaningful.
64 */
65static int iris_init(void)
66{
67 unsigned char status;
68 if (force != 1) {
69 printk(KERN_ERR "The force parameter has not been set to 1 so the Iris poweroff handler will not be installed.\n");
70 return -ENODEV;
71 }
72 status = inb(IRIS_GIO_INPUT);
73 if (status == IRIS_GIO_NODEV) {
74 printk(KERN_ERR "This machine does not seem to be an Iris. Power_off handler not installed.\n");
75 return -ENODEV;
76 }
77 old_pm_power_off = pm_power_off;
78 pm_power_off = &iris_power_off;
79 printk(KERN_INFO "Iris power_off handler installed.\n");
80
81 return 0;
82}
83
84static void iris_exit(void)
85{
86 pm_power_off = old_pm_power_off;
87 printk(KERN_INFO "Iris power_off handler uninstalled.\n");
88}
89
90module_init(iris_init);
91module_exit(iris_exit);
diff --git a/arch/x86/platform/mrst/Makefile b/arch/x86/platform/mrst/Makefile
new file mode 100644
index 000000000000..f61ccdd49341
--- /dev/null
+++ b/arch/x86/platform/mrst/Makefile
@@ -0,0 +1,3 @@
1obj-$(CONFIG_X86_MRST) += mrst.o
2obj-$(CONFIG_X86_MRST) += vrtc.o
3obj-$(CONFIG_EARLY_PRINTK_MRST) += early_printk_mrst.o
diff --git a/arch/x86/platform/mrst/early_printk_mrst.c b/arch/x86/platform/mrst/early_printk_mrst.c
new file mode 100644
index 000000000000..25bfdbb5b130
--- /dev/null
+++ b/arch/x86/platform/mrst/early_printk_mrst.c
@@ -0,0 +1,319 @@
1/*
2 * early_printk_mrst.c - early consoles for Intel MID platforms
3 *
4 * Copyright (c) 2008-2010, Intel Corporation
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; version 2
9 * of the License.
10 */
11
12/*
13 * This file implements two early consoles named mrst and hsu.
14 * mrst is based on Maxim3110 spi-uart device, it exists in both
15 * Moorestown and Medfield platforms, while hsu is based on a High
16 * Speed UART device which only exists in the Medfield platform
17 */
18
19#include <linux/serial_reg.h>
20#include <linux/serial_mfd.h>
21#include <linux/kmsg_dump.h>
22#include <linux/console.h>
23#include <linux/kernel.h>
24#include <linux/delay.h>
25#include <linux/init.h>
26#include <linux/io.h>
27
28#include <asm/fixmap.h>
29#include <asm/pgtable.h>
30#include <asm/mrst.h>
31
32#define MRST_SPI_TIMEOUT 0x200000
33#define MRST_REGBASE_SPI0 0xff128000
34#define MRST_REGBASE_SPI1 0xff128400
35#define MRST_CLK_SPI0_REG 0xff11d86c
36
37/* Bit fields in CTRLR0 */
38#define SPI_DFS_OFFSET 0
39
40#define SPI_FRF_OFFSET 4
41#define SPI_FRF_SPI 0x0
42#define SPI_FRF_SSP 0x1
43#define SPI_FRF_MICROWIRE 0x2
44#define SPI_FRF_RESV 0x3
45
46#define SPI_MODE_OFFSET 6
47#define SPI_SCPH_OFFSET 6
48#define SPI_SCOL_OFFSET 7
49#define SPI_TMOD_OFFSET 8
50#define SPI_TMOD_TR 0x0 /* xmit & recv */
51#define SPI_TMOD_TO 0x1 /* xmit only */
52#define SPI_TMOD_RO 0x2 /* recv only */
53#define SPI_TMOD_EPROMREAD 0x3 /* eeprom read mode */
54
55#define SPI_SLVOE_OFFSET 10
56#define SPI_SRL_OFFSET 11
57#define SPI_CFS_OFFSET 12
58
59/* Bit fields in SR, 7 bits */
60#define SR_MASK 0x7f /* cover 7 bits */
61#define SR_BUSY (1 << 0)
62#define SR_TF_NOT_FULL (1 << 1)
63#define SR_TF_EMPT (1 << 2)
64#define SR_RF_NOT_EMPT (1 << 3)
65#define SR_RF_FULL (1 << 4)
66#define SR_TX_ERR (1 << 5)
67#define SR_DCOL (1 << 6)
68
69struct dw_spi_reg {
70 u32 ctrl0;
71 u32 ctrl1;
72 u32 ssienr;
73 u32 mwcr;
74 u32 ser;
75 u32 baudr;
76 u32 txfltr;
77 u32 rxfltr;
78 u32 txflr;
79 u32 rxflr;
80 u32 sr;
81 u32 imr;
82 u32 isr;
83 u32 risr;
84 u32 txoicr;
85 u32 rxoicr;
86 u32 rxuicr;
87 u32 msticr;
88 u32 icr;
89 u32 dmacr;
90 u32 dmatdlr;
91 u32 dmardlr;
92 u32 idr;
93 u32 version;
94
95 /* Currently operates as 32 bits, though only the low 16 bits matter */
96 u32 dr;
97} __packed;
98
99#define dw_readl(dw, name) __raw_readl(&(dw)->name)
100#define dw_writel(dw, name, val) __raw_writel((val), &(dw)->name)
101
102/* Default use SPI0 register for mrst, we will detect Penwell and use SPI1 */
103static unsigned long mrst_spi_paddr = MRST_REGBASE_SPI0;
104
105static u32 *pclk_spi0;
106/* Always contains an accessible address, start with 0 */
107static struct dw_spi_reg *pspi;
108
109static struct kmsg_dumper dw_dumper;
110static int dumper_registered;
111
112static void dw_kmsg_dump(struct kmsg_dumper *dumper,
113 enum kmsg_dump_reason reason,
114 const char *s1, unsigned long l1,
115 const char *s2, unsigned long l2)
116{
117 int i;
118
119 /* When run to this, we'd better re-init the HW */
120 mrst_early_console_init();
121
122 for (i = 0; i < l1; i++)
123 early_mrst_console.write(&early_mrst_console, s1 + i, 1);
124 for (i = 0; i < l2; i++)
125 early_mrst_console.write(&early_mrst_console, s2 + i, 1);
126}
127
128/* Set the ratio rate to 115200, 8n1, IRQ disabled */
129static void max3110_write_config(void)
130{
131 u16 config;
132
133 config = 0xc001;
134 dw_writel(pspi, dr, config);
135}
136
137/* Translate char to a eligible word and send to max3110 */
138static void max3110_write_data(char c)
139{
140 u16 data;
141
142 data = 0x8000 | c;
143 dw_writel(pspi, dr, data);
144}
145
146void mrst_early_console_init(void)
147{
148 u32 ctrlr0 = 0;
149 u32 spi0_cdiv;
150 u32 freq; /* Freqency info only need be searched once */
151
152 /* Base clk is 100 MHz, the actual clk = 100M / (clk_divider + 1) */
153 pclk_spi0 = (void *)set_fixmap_offset_nocache(FIX_EARLYCON_MEM_BASE,
154 MRST_CLK_SPI0_REG);
155 spi0_cdiv = ((*pclk_spi0) & 0xe00) >> 9;
156 freq = 100000000 / (spi0_cdiv + 1);
157
158 if (mrst_identify_cpu() == MRST_CPU_CHIP_PENWELL)
159 mrst_spi_paddr = MRST_REGBASE_SPI1;
160
161 pspi = (void *)set_fixmap_offset_nocache(FIX_EARLYCON_MEM_BASE,
162 mrst_spi_paddr);
163
164 /* Disable SPI controller */
165 dw_writel(pspi, ssienr, 0);
166
167 /* Set control param, 8 bits, transmit only mode */
168 ctrlr0 = dw_readl(pspi, ctrl0);
169
170 ctrlr0 &= 0xfcc0;
171 ctrlr0 |= 0xf | (SPI_FRF_SPI << SPI_FRF_OFFSET)
172 | (SPI_TMOD_TO << SPI_TMOD_OFFSET);
173 dw_writel(pspi, ctrl0, ctrlr0);
174
175 /*
176 * Change the spi0 clk to comply with 115200 bps, use 100000 to
177 * calculate the clk dividor to make the clock a little slower
178 * than real baud rate.
179 */
180 dw_writel(pspi, baudr, freq/100000);
181
182 /* Disable all INT for early phase */
183 dw_writel(pspi, imr, 0x0);
184
185 /* Set the cs to spi-uart */
186 dw_writel(pspi, ser, 0x2);
187
188 /* Enable the HW, the last step for HW init */
189 dw_writel(pspi, ssienr, 0x1);
190
191 /* Set the default configuration */
192 max3110_write_config();
193
194 /* Register the kmsg dumper */
195 if (!dumper_registered) {
196 dw_dumper.dump = dw_kmsg_dump;
197 kmsg_dump_register(&dw_dumper);
198 dumper_registered = 1;
199 }
200}
201
202/* Slave select should be called in the read/write function */
203static void early_mrst_spi_putc(char c)
204{
205 unsigned int timeout;
206 u32 sr;
207
208 timeout = MRST_SPI_TIMEOUT;
209 /* Early putc needs to make sure the TX FIFO is not full */
210 while (--timeout) {
211 sr = dw_readl(pspi, sr);
212 if (!(sr & SR_TF_NOT_FULL))
213 cpu_relax();
214 else
215 break;
216 }
217
218 if (!timeout)
219 pr_warning("MRST earlycon: timed out\n");
220 else
221 max3110_write_data(c);
222}
223
224/* Early SPI only uses polling mode */
225static void early_mrst_spi_write(struct console *con, const char *str, unsigned n)
226{
227 int i;
228
229 for (i = 0; i < n && *str; i++) {
230 if (*str == '\n')
231 early_mrst_spi_putc('\r');
232 early_mrst_spi_putc(*str);
233 str++;
234 }
235}
236
237struct console early_mrst_console = {
238 .name = "earlymrst",
239 .write = early_mrst_spi_write,
240 .flags = CON_PRINTBUFFER,
241 .index = -1,
242};
243
244/*
245 * Following is the early console based on Medfield HSU (High
246 * Speed UART) device.
247 */
248#define HSU_PORT2_PADDR 0xffa28180
249
250static void __iomem *phsu;
251
252void hsu_early_console_init(void)
253{
254 u8 lcr;
255
256 phsu = (void *)set_fixmap_offset_nocache(FIX_EARLYCON_MEM_BASE,
257 HSU_PORT2_PADDR);
258
259 /* Disable FIFO */
260 writeb(0x0, phsu + UART_FCR);
261
262 /* Set to default 115200 bps, 8n1 */
263 lcr = readb(phsu + UART_LCR);
264 writeb((0x80 | lcr), phsu + UART_LCR);
265 writeb(0x18, phsu + UART_DLL);
266 writeb(lcr, phsu + UART_LCR);
267 writel(0x3600, phsu + UART_MUL*4);
268
269 writeb(0x8, phsu + UART_MCR);
270 writeb(0x7, phsu + UART_FCR);
271 writeb(0x3, phsu + UART_LCR);
272
273 /* Clear IRQ status */
274 readb(phsu + UART_LSR);
275 readb(phsu + UART_RX);
276 readb(phsu + UART_IIR);
277 readb(phsu + UART_MSR);
278
279 /* Enable FIFO */
280 writeb(0x7, phsu + UART_FCR);
281}
282
283#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
284
285static void early_hsu_putc(char ch)
286{
287 unsigned int timeout = 10000; /* 10ms */
288 u8 status;
289
290 while (--timeout) {
291 status = readb(phsu + UART_LSR);
292 if (status & BOTH_EMPTY)
293 break;
294 udelay(1);
295 }
296
297 /* Only write the char when there was no timeout */
298 if (timeout)
299 writeb(ch, phsu + UART_TX);
300}
301
302static void early_hsu_write(struct console *con, const char *str, unsigned n)
303{
304 int i;
305
306 for (i = 0; i < n && *str; i++) {
307 if (*str == '\n')
308 early_hsu_putc('\r');
309 early_hsu_putc(*str);
310 str++;
311 }
312}
313
314struct console early_hsu_console = {
315 .name = "earlyhsu",
316 .write = early_hsu_write,
317 .flags = CON_PRINTBUFFER,
318 .index = -1,
319};
diff --git a/arch/x86/platform/mrst/mrst.c b/arch/x86/platform/mrst/mrst.c
new file mode 100644
index 000000000000..7000e74b3087
--- /dev/null
+++ b/arch/x86/platform/mrst/mrst.c
@@ -0,0 +1,811 @@
1/*
2 * mrst.c: Intel Moorestown platform specific setup code
3 *
4 * (C) Copyright 2008 Intel Corporation
5 * Author: Jacob Pan (jacob.jun.pan@intel.com)
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; version 2
10 * of the License.
11 */
12
13#define pr_fmt(fmt) "mrst: " fmt
14
15#include <linux/init.h>
16#include <linux/kernel.h>
17#include <linux/sfi.h>
18#include <linux/intel_pmic_gpio.h>
19#include <linux/spi/spi.h>
20#include <linux/i2c.h>
21#include <linux/i2c/pca953x.h>
22#include <linux/gpio_keys.h>
23#include <linux/input.h>
24#include <linux/platform_device.h>
25#include <linux/irq.h>
26#include <linux/module.h>
27
28#include <asm/setup.h>
29#include <asm/mpspec_def.h>
30#include <asm/hw_irq.h>
31#include <asm/apic.h>
32#include <asm/io_apic.h>
33#include <asm/mrst.h>
34#include <asm/mrst-vrtc.h>
35#include <asm/io.h>
36#include <asm/i8259.h>
37#include <asm/intel_scu_ipc.h>
38#include <asm/apb_timer.h>
39#include <asm/reboot.h>
40
41/*
42 * the clockevent devices on Moorestown/Medfield can be APBT or LAPIC clock,
43 * cmdline option x86_mrst_timer can be used to override the configuration
44 * to prefer one or the other.
45 * at runtime, there are basically three timer configurations:
46 * 1. per cpu apbt clock only
47 * 2. per cpu always-on lapic clocks only, this is Penwell/Medfield only
48 * 3. per cpu lapic clock (C3STOP) and one apbt clock, with broadcast.
49 *
50 * by default (without cmdline option), platform code first detects cpu type
51 * to see if we are on lincroft or penwell, then set up both lapic or apbt
52 * clocks accordingly.
53 * i.e. by default, medfield uses configuration #2, moorestown uses #1.
54 * config #3 is supported but not recommended on medfield.
55 *
56 * rating and feature summary:
57 * lapic (with C3STOP) --------- 100
58 * apbt (always-on) ------------ 110
59 * lapic (always-on,ARAT) ------ 150
60 */
61
62__cpuinitdata enum mrst_timer_options mrst_timer_options;
63
64static u32 sfi_mtimer_usage[SFI_MTMR_MAX_NUM];
65static struct sfi_timer_table_entry sfi_mtimer_array[SFI_MTMR_MAX_NUM];
66enum mrst_cpu_type __mrst_cpu_chip;
67EXPORT_SYMBOL_GPL(__mrst_cpu_chip);
68
69int sfi_mtimer_num;
70
71struct sfi_rtc_table_entry sfi_mrtc_array[SFI_MRTC_MAX];
72EXPORT_SYMBOL_GPL(sfi_mrtc_array);
73int sfi_mrtc_num;
74
75/* parse all the mtimer info to a static mtimer array */
76static int __init sfi_parse_mtmr(struct sfi_table_header *table)
77{
78 struct sfi_table_simple *sb;
79 struct sfi_timer_table_entry *pentry;
80 struct mpc_intsrc mp_irq;
81 int totallen;
82
83 sb = (struct sfi_table_simple *)table;
84 if (!sfi_mtimer_num) {
85 sfi_mtimer_num = SFI_GET_NUM_ENTRIES(sb,
86 struct sfi_timer_table_entry);
87 pentry = (struct sfi_timer_table_entry *) sb->pentry;
88 totallen = sfi_mtimer_num * sizeof(*pentry);
89 memcpy(sfi_mtimer_array, pentry, totallen);
90 }
91
92 pr_debug("SFI MTIMER info (num = %d):\n", sfi_mtimer_num);
93 pentry = sfi_mtimer_array;
94 for (totallen = 0; totallen < sfi_mtimer_num; totallen++, pentry++) {
95 pr_debug("timer[%d]: paddr = 0x%08x, freq = %dHz,"
96 " irq = %d\n", totallen, (u32)pentry->phys_addr,
97 pentry->freq_hz, pentry->irq);
98 if (!pentry->irq)
99 continue;
100 mp_irq.type = MP_INTSRC;
101 mp_irq.irqtype = mp_INT;
102/* triggering mode edge bit 2-3, active high polarity bit 0-1 */
103 mp_irq.irqflag = 5;
104 mp_irq.srcbus = MP_BUS_ISA;
105 mp_irq.srcbusirq = pentry->irq; /* IRQ */
106 mp_irq.dstapic = MP_APIC_ALL;
107 mp_irq.dstirq = pentry->irq;
108 mp_save_irq(&mp_irq);
109 }
110
111 return 0;
112}
113
114struct sfi_timer_table_entry *sfi_get_mtmr(int hint)
115{
116 int i;
117 if (hint < sfi_mtimer_num) {
118 if (!sfi_mtimer_usage[hint]) {
119 pr_debug("hint taken for timer %d irq %d\n",\
120 hint, sfi_mtimer_array[hint].irq);
121 sfi_mtimer_usage[hint] = 1;
122 return &sfi_mtimer_array[hint];
123 }
124 }
125 /* take the first timer available */
126 for (i = 0; i < sfi_mtimer_num;) {
127 if (!sfi_mtimer_usage[i]) {
128 sfi_mtimer_usage[i] = 1;
129 return &sfi_mtimer_array[i];
130 }
131 i++;
132 }
133 return NULL;
134}
135
136void sfi_free_mtmr(struct sfi_timer_table_entry *mtmr)
137{
138 int i;
139 for (i = 0; i < sfi_mtimer_num;) {
140 if (mtmr->irq == sfi_mtimer_array[i].irq) {
141 sfi_mtimer_usage[i] = 0;
142 return;
143 }
144 i++;
145 }
146}
147
148/* parse all the mrtc info to a global mrtc array */
149int __init sfi_parse_mrtc(struct sfi_table_header *table)
150{
151 struct sfi_table_simple *sb;
152 struct sfi_rtc_table_entry *pentry;
153 struct mpc_intsrc mp_irq;
154
155 int totallen;
156
157 sb = (struct sfi_table_simple *)table;
158 if (!sfi_mrtc_num) {
159 sfi_mrtc_num = SFI_GET_NUM_ENTRIES(sb,
160 struct sfi_rtc_table_entry);
161 pentry = (struct sfi_rtc_table_entry *)sb->pentry;
162 totallen = sfi_mrtc_num * sizeof(*pentry);
163 memcpy(sfi_mrtc_array, pentry, totallen);
164 }
165
166 pr_debug("SFI RTC info (num = %d):\n", sfi_mrtc_num);
167 pentry = sfi_mrtc_array;
168 for (totallen = 0; totallen < sfi_mrtc_num; totallen++, pentry++) {
169 pr_debug("RTC[%d]: paddr = 0x%08x, irq = %d\n",
170 totallen, (u32)pentry->phys_addr, pentry->irq);
171 mp_irq.type = MP_INTSRC;
172 mp_irq.irqtype = mp_INT;
173 mp_irq.irqflag = 0xf; /* level trigger and active low */
174 mp_irq.srcbus = MP_BUS_ISA;
175 mp_irq.srcbusirq = pentry->irq; /* IRQ */
176 mp_irq.dstapic = MP_APIC_ALL;
177 mp_irq.dstirq = pentry->irq;
178 mp_save_irq(&mp_irq);
179 }
180 return 0;
181}
182
183static unsigned long __init mrst_calibrate_tsc(void)
184{
185 unsigned long flags, fast_calibrate;
186
187 local_irq_save(flags);
188 fast_calibrate = apbt_quick_calibrate();
189 local_irq_restore(flags);
190
191 if (fast_calibrate)
192 return fast_calibrate;
193
194 return 0;
195}
196
197static void __init mrst_time_init(void)
198{
199 sfi_table_parse(SFI_SIG_MTMR, NULL, NULL, sfi_parse_mtmr);
200 switch (mrst_timer_options) {
201 case MRST_TIMER_APBT_ONLY:
202 break;
203 case MRST_TIMER_LAPIC_APBT:
204 x86_init.timers.setup_percpu_clockev = setup_boot_APIC_clock;
205 x86_cpuinit.setup_percpu_clockev = setup_secondary_APIC_clock;
206 break;
207 default:
208 if (!boot_cpu_has(X86_FEATURE_ARAT))
209 break;
210 x86_init.timers.setup_percpu_clockev = setup_boot_APIC_clock;
211 x86_cpuinit.setup_percpu_clockev = setup_secondary_APIC_clock;
212 return;
213 }
214 /* we need at least one APB timer */
215 pre_init_apic_IRQ0();
216 apbt_time_init();
217}
218
219static void __cpuinit mrst_arch_setup(void)
220{
221 if (boot_cpu_data.x86 == 6 && boot_cpu_data.x86_model == 0x27)
222 __mrst_cpu_chip = MRST_CPU_CHIP_PENWELL;
223 else if (boot_cpu_data.x86 == 6 && boot_cpu_data.x86_model == 0x26)
224 __mrst_cpu_chip = MRST_CPU_CHIP_LINCROFT;
225 else {
226 pr_err("Unknown Moorestown CPU (%d:%d), default to Lincroft\n",
227 boot_cpu_data.x86, boot_cpu_data.x86_model);
228 __mrst_cpu_chip = MRST_CPU_CHIP_LINCROFT;
229 }
230 pr_debug("Moorestown CPU %s identified\n",
231 (__mrst_cpu_chip == MRST_CPU_CHIP_LINCROFT) ?
232 "Lincroft" : "Penwell");
233}
234
235/* MID systems don't have i8042 controller */
236static int mrst_i8042_detect(void)
237{
238 return 0;
239}
240
241/* Reboot and power off are handled by the SCU on a MID device */
242static void mrst_power_off(void)
243{
244 intel_scu_ipc_simple_command(0xf1, 1);
245}
246
247static void mrst_reboot(void)
248{
249 intel_scu_ipc_simple_command(0xf1, 0);
250}
251
252/*
253 * Moorestown specific x86_init function overrides and early setup
254 * calls.
255 */
256void __init x86_mrst_early_setup(void)
257{
258 x86_init.resources.probe_roms = x86_init_noop;
259 x86_init.resources.reserve_resources = x86_init_noop;
260
261 x86_init.timers.timer_init = mrst_time_init;
262 x86_init.timers.setup_percpu_clockev = x86_init_noop;
263
264 x86_init.irqs.pre_vector_init = x86_init_noop;
265
266 x86_init.oem.arch_setup = mrst_arch_setup;
267
268 x86_cpuinit.setup_percpu_clockev = apbt_setup_secondary_clock;
269
270 x86_platform.calibrate_tsc = mrst_calibrate_tsc;
271 x86_platform.i8042_detect = mrst_i8042_detect;
272 x86_init.timers.wallclock_init = mrst_rtc_init;
273 x86_init.pci.init = pci_mrst_init;
274 x86_init.pci.fixup_irqs = x86_init_noop;
275
276 legacy_pic = &null_legacy_pic;
277
278 /* Moorestown specific power_off/restart method */
279 pm_power_off = mrst_power_off;
280 machine_ops.emergency_restart = mrst_reboot;
281
282 /* Avoid searching for BIOS MP tables */
283 x86_init.mpparse.find_smp_config = x86_init_noop;
284 x86_init.mpparse.get_smp_config = x86_init_uint_noop;
285 set_bit(MP_BUS_ISA, mp_bus_not_pci);
286}
287
288/*
289 * if user does not want to use per CPU apb timer, just give it a lower rating
290 * than local apic timer and skip the late per cpu timer init.
291 */
292static inline int __init setup_x86_mrst_timer(char *arg)
293{
294 if (!arg)
295 return -EINVAL;
296
297 if (strcmp("apbt_only", arg) == 0)
298 mrst_timer_options = MRST_TIMER_APBT_ONLY;
299 else if (strcmp("lapic_and_apbt", arg) == 0)
300 mrst_timer_options = MRST_TIMER_LAPIC_APBT;
301 else {
302 pr_warning("X86 MRST timer option %s not recognised"
303 " use x86_mrst_timer=apbt_only or lapic_and_apbt\n",
304 arg);
305 return -EINVAL;
306 }
307 return 0;
308}
309__setup("x86_mrst_timer=", setup_x86_mrst_timer);
310
311/*
312 * Parsing GPIO table first, since the DEVS table will need this table
313 * to map the pin name to the actual pin.
314 */
315static struct sfi_gpio_table_entry *gpio_table;
316static int gpio_num_entry;
317
318static int __init sfi_parse_gpio(struct sfi_table_header *table)
319{
320 struct sfi_table_simple *sb;
321 struct sfi_gpio_table_entry *pentry;
322 int num, i;
323
324 if (gpio_table)
325 return 0;
326 sb = (struct sfi_table_simple *)table;
327 num = SFI_GET_NUM_ENTRIES(sb, struct sfi_gpio_table_entry);
328 pentry = (struct sfi_gpio_table_entry *)sb->pentry;
329
330 gpio_table = (struct sfi_gpio_table_entry *)
331 kmalloc(num * sizeof(*pentry), GFP_KERNEL);
332 if (!gpio_table)
333 return -1;
334 memcpy(gpio_table, pentry, num * sizeof(*pentry));
335 gpio_num_entry = num;
336
337 pr_debug("GPIO pin info:\n");
338 for (i = 0; i < num; i++, pentry++)
339 pr_debug("info[%2d]: controller = %16.16s, pin_name = %16.16s,"
340 " pin = %d\n", i,
341 pentry->controller_name,
342 pentry->pin_name,
343 pentry->pin_no);
344 return 0;
345}
346
347static int get_gpio_by_name(const char *name)
348{
349 struct sfi_gpio_table_entry *pentry = gpio_table;
350 int i;
351
352 if (!pentry)
353 return -1;
354 for (i = 0; i < gpio_num_entry; i++, pentry++) {
355 if (!strncmp(name, pentry->pin_name, SFI_NAME_LEN))
356 return pentry->pin_no;
357 }
358 return -1;
359}
360
361/*
362 * Here defines the array of devices platform data that IAFW would export
363 * through SFI "DEVS" table, we use name and type to match the device and
364 * its platform data.
365 */
366struct devs_id {
367 char name[SFI_NAME_LEN + 1];
368 u8 type;
369 u8 delay;
370 void *(*get_platform_data)(void *info);
371};
372
373/* the offset for the mapping of global gpio pin to irq */
374#define MRST_IRQ_OFFSET 0x100
375
376static void __init *pmic_gpio_platform_data(void *info)
377{
378 static struct intel_pmic_gpio_platform_data pmic_gpio_pdata;
379 int gpio_base = get_gpio_by_name("pmic_gpio_base");
380
381 if (gpio_base == -1)
382 gpio_base = 64;
383 pmic_gpio_pdata.gpio_base = gpio_base;
384 pmic_gpio_pdata.irq_base = gpio_base + MRST_IRQ_OFFSET;
385 pmic_gpio_pdata.gpiointr = 0xffffeff8;
386
387 return &pmic_gpio_pdata;
388}
389
390static void __init *max3111_platform_data(void *info)
391{
392 struct spi_board_info *spi_info = info;
393 int intr = get_gpio_by_name("max3111_int");
394
395 if (intr == -1)
396 return NULL;
397 spi_info->irq = intr + MRST_IRQ_OFFSET;
398 return NULL;
399}
400
401/* we have multiple max7315 on the board ... */
402#define MAX7315_NUM 2
403static void __init *max7315_platform_data(void *info)
404{
405 static struct pca953x_platform_data max7315_pdata[MAX7315_NUM];
406 static int nr;
407 struct pca953x_platform_data *max7315 = &max7315_pdata[nr];
408 struct i2c_board_info *i2c_info = info;
409 int gpio_base, intr;
410 char base_pin_name[SFI_NAME_LEN + 1];
411 char intr_pin_name[SFI_NAME_LEN + 1];
412
413 if (nr == MAX7315_NUM) {
414 pr_err("too many max7315s, we only support %d\n",
415 MAX7315_NUM);
416 return NULL;
417 }
418 /* we have several max7315 on the board, we only need load several
419 * instances of the same pca953x driver to cover them
420 */
421 strcpy(i2c_info->type, "max7315");
422 if (nr++) {
423 sprintf(base_pin_name, "max7315_%d_base", nr);
424 sprintf(intr_pin_name, "max7315_%d_int", nr);
425 } else {
426 strcpy(base_pin_name, "max7315_base");
427 strcpy(intr_pin_name, "max7315_int");
428 }
429
430 gpio_base = get_gpio_by_name(base_pin_name);
431 intr = get_gpio_by_name(intr_pin_name);
432
433 if (gpio_base == -1)
434 return NULL;
435 max7315->gpio_base = gpio_base;
436 if (intr != -1) {
437 i2c_info->irq = intr + MRST_IRQ_OFFSET;
438 max7315->irq_base = gpio_base + MRST_IRQ_OFFSET;
439 } else {
440 i2c_info->irq = -1;
441 max7315->irq_base = -1;
442 }
443 return max7315;
444}
445
446static void __init *emc1403_platform_data(void *info)
447{
448 static short intr2nd_pdata;
449 struct i2c_board_info *i2c_info = info;
450 int intr = get_gpio_by_name("thermal_int");
451 int intr2nd = get_gpio_by_name("thermal_alert");
452
453 if (intr == -1 || intr2nd == -1)
454 return NULL;
455
456 i2c_info->irq = intr + MRST_IRQ_OFFSET;
457 intr2nd_pdata = intr2nd + MRST_IRQ_OFFSET;
458
459 return &intr2nd_pdata;
460}
461
462static void __init *lis331dl_platform_data(void *info)
463{
464 static short intr2nd_pdata;
465 struct i2c_board_info *i2c_info = info;
466 int intr = get_gpio_by_name("accel_int");
467 int intr2nd = get_gpio_by_name("accel_2");
468
469 if (intr == -1 || intr2nd == -1)
470 return NULL;
471
472 i2c_info->irq = intr + MRST_IRQ_OFFSET;
473 intr2nd_pdata = intr2nd + MRST_IRQ_OFFSET;
474
475 return &intr2nd_pdata;
476}
477
478static void __init *no_platform_data(void *info)
479{
480 return NULL;
481}
482
483static const struct devs_id __initconst device_ids[] = {
484 {"pmic_gpio", SFI_DEV_TYPE_SPI, 1, &pmic_gpio_platform_data},
485 {"spi_max3111", SFI_DEV_TYPE_SPI, 0, &max3111_platform_data},
486 {"i2c_max7315", SFI_DEV_TYPE_I2C, 1, &max7315_platform_data},
487 {"i2c_max7315_2", SFI_DEV_TYPE_I2C, 1, &max7315_platform_data},
488 {"emc1403", SFI_DEV_TYPE_I2C, 1, &emc1403_platform_data},
489 {"i2c_accel", SFI_DEV_TYPE_I2C, 0, &lis331dl_platform_data},
490 {"pmic_audio", SFI_DEV_TYPE_IPC, 1, &no_platform_data},
491 {"msic_audio", SFI_DEV_TYPE_IPC, 1, &no_platform_data},
492 {},
493};
494
495#define MAX_IPCDEVS 24
496static struct platform_device *ipc_devs[MAX_IPCDEVS];
497static int ipc_next_dev;
498
499#define MAX_SCU_SPI 24
500static struct spi_board_info *spi_devs[MAX_SCU_SPI];
501static int spi_next_dev;
502
503#define MAX_SCU_I2C 24
504static struct i2c_board_info *i2c_devs[MAX_SCU_I2C];
505static int i2c_bus[MAX_SCU_I2C];
506static int i2c_next_dev;
507
508static void __init intel_scu_device_register(struct platform_device *pdev)
509{
510 if(ipc_next_dev == MAX_IPCDEVS)
511 pr_err("too many SCU IPC devices");
512 else
513 ipc_devs[ipc_next_dev++] = pdev;
514}
515
516static void __init intel_scu_spi_device_register(struct spi_board_info *sdev)
517{
518 struct spi_board_info *new_dev;
519
520 if (spi_next_dev == MAX_SCU_SPI) {
521 pr_err("too many SCU SPI devices");
522 return;
523 }
524
525 new_dev = kzalloc(sizeof(*sdev), GFP_KERNEL);
526 if (!new_dev) {
527 pr_err("failed to alloc mem for delayed spi dev %s\n",
528 sdev->modalias);
529 return;
530 }
531 memcpy(new_dev, sdev, sizeof(*sdev));
532
533 spi_devs[spi_next_dev++] = new_dev;
534}
535
536static void __init intel_scu_i2c_device_register(int bus,
537 struct i2c_board_info *idev)
538{
539 struct i2c_board_info *new_dev;
540
541 if (i2c_next_dev == MAX_SCU_I2C) {
542 pr_err("too many SCU I2C devices");
543 return;
544 }
545
546 new_dev = kzalloc(sizeof(*idev), GFP_KERNEL);
547 if (!new_dev) {
548 pr_err("failed to alloc mem for delayed i2c dev %s\n",
549 idev->type);
550 return;
551 }
552 memcpy(new_dev, idev, sizeof(*idev));
553
554 i2c_bus[i2c_next_dev] = bus;
555 i2c_devs[i2c_next_dev++] = new_dev;
556}
557
558/* Called by IPC driver */
559void intel_scu_devices_create(void)
560{
561 int i;
562
563 for (i = 0; i < ipc_next_dev; i++)
564 platform_device_add(ipc_devs[i]);
565
566 for (i = 0; i < spi_next_dev; i++)
567 spi_register_board_info(spi_devs[i], 1);
568
569 for (i = 0; i < i2c_next_dev; i++) {
570 struct i2c_adapter *adapter;
571 struct i2c_client *client;
572
573 adapter = i2c_get_adapter(i2c_bus[i]);
574 if (adapter) {
575 client = i2c_new_device(adapter, i2c_devs[i]);
576 if (!client)
577 pr_err("can't create i2c device %s\n",
578 i2c_devs[i]->type);
579 } else
580 i2c_register_board_info(i2c_bus[i], i2c_devs[i], 1);
581 }
582}
583EXPORT_SYMBOL_GPL(intel_scu_devices_create);
584
585/* Called by IPC driver */
586void intel_scu_devices_destroy(void)
587{
588 int i;
589
590 for (i = 0; i < ipc_next_dev; i++)
591 platform_device_del(ipc_devs[i]);
592}
593EXPORT_SYMBOL_GPL(intel_scu_devices_destroy);
594
595static void __init install_irq_resource(struct platform_device *pdev, int irq)
596{
597 /* Single threaded */
598 static struct resource __initdata res = {
599 .name = "IRQ",
600 .flags = IORESOURCE_IRQ,
601 };
602 res.start = irq;
603 platform_device_add_resources(pdev, &res, 1);
604}
605
606static void __init sfi_handle_ipc_dev(struct platform_device *pdev)
607{
608 const struct devs_id *dev = device_ids;
609 void *pdata = NULL;
610
611 while (dev->name[0]) {
612 if (dev->type == SFI_DEV_TYPE_IPC &&
613 !strncmp(dev->name, pdev->name, SFI_NAME_LEN)) {
614 pdata = dev->get_platform_data(pdev);
615 break;
616 }
617 dev++;
618 }
619 pdev->dev.platform_data = pdata;
620 intel_scu_device_register(pdev);
621}
622
623static void __init sfi_handle_spi_dev(struct spi_board_info *spi_info)
624{
625 const struct devs_id *dev = device_ids;
626 void *pdata = NULL;
627
628 while (dev->name[0]) {
629 if (dev->type == SFI_DEV_TYPE_SPI &&
630 !strncmp(dev->name, spi_info->modalias, SFI_NAME_LEN)) {
631 pdata = dev->get_platform_data(spi_info);
632 break;
633 }
634 dev++;
635 }
636 spi_info->platform_data = pdata;
637 if (dev->delay)
638 intel_scu_spi_device_register(spi_info);
639 else
640 spi_register_board_info(spi_info, 1);
641}
642
643static void __init sfi_handle_i2c_dev(int bus, struct i2c_board_info *i2c_info)
644{
645 const struct devs_id *dev = device_ids;
646 void *pdata = NULL;
647
648 while (dev->name[0]) {
649 if (dev->type == SFI_DEV_TYPE_I2C &&
650 !strncmp(dev->name, i2c_info->type, SFI_NAME_LEN)) {
651 pdata = dev->get_platform_data(i2c_info);
652 break;
653 }
654 dev++;
655 }
656 i2c_info->platform_data = pdata;
657
658 if (dev->delay)
659 intel_scu_i2c_device_register(bus, i2c_info);
660 else
661 i2c_register_board_info(bus, i2c_info, 1);
662 }
663
664
665static int __init sfi_parse_devs(struct sfi_table_header *table)
666{
667 struct sfi_table_simple *sb;
668 struct sfi_device_table_entry *pentry;
669 struct spi_board_info spi_info;
670 struct i2c_board_info i2c_info;
671 struct platform_device *pdev;
672 int num, i, bus;
673 int ioapic;
674 struct io_apic_irq_attr irq_attr;
675
676 sb = (struct sfi_table_simple *)table;
677 num = SFI_GET_NUM_ENTRIES(sb, struct sfi_device_table_entry);
678 pentry = (struct sfi_device_table_entry *)sb->pentry;
679
680 for (i = 0; i < num; i++, pentry++) {
681 if (pentry->irq != (u8)0xff) { /* native RTE case */
682 /* these SPI2 devices are not exposed to system as PCI
683 * devices, but they have separate RTE entry in IOAPIC
684 * so we have to enable them one by one here
685 */
686 ioapic = mp_find_ioapic(pentry->irq);
687 irq_attr.ioapic = ioapic;
688 irq_attr.ioapic_pin = pentry->irq;
689 irq_attr.trigger = 1;
690 irq_attr.polarity = 1;
691 io_apic_set_pci_routing(NULL, pentry->irq, &irq_attr);
692 }
693 switch (pentry->type) {
694 case SFI_DEV_TYPE_IPC:
695 /* ID as IRQ is a hack that will go away */
696 pdev = platform_device_alloc(pentry->name, pentry->irq);
697 if (pdev == NULL) {
698 pr_err("out of memory for SFI platform device '%s'.\n",
699 pentry->name);
700 continue;
701 }
702 install_irq_resource(pdev, pentry->irq);
703 pr_debug("info[%2d]: IPC bus, name = %16.16s, "
704 "irq = 0x%2x\n", i, pentry->name, pentry->irq);
705 sfi_handle_ipc_dev(pdev);
706 break;
707 case SFI_DEV_TYPE_SPI:
708 memset(&spi_info, 0, sizeof(spi_info));
709 strncpy(spi_info.modalias, pentry->name, SFI_NAME_LEN);
710 spi_info.irq = pentry->irq;
711 spi_info.bus_num = pentry->host_num;
712 spi_info.chip_select = pentry->addr;
713 spi_info.max_speed_hz = pentry->max_freq;
714 pr_debug("info[%2d]: SPI bus = %d, name = %16.16s, "
715 "irq = 0x%2x, max_freq = %d, cs = %d\n", i,
716 spi_info.bus_num,
717 spi_info.modalias,
718 spi_info.irq,
719 spi_info.max_speed_hz,
720 spi_info.chip_select);
721 sfi_handle_spi_dev(&spi_info);
722 break;
723 case SFI_DEV_TYPE_I2C:
724 memset(&i2c_info, 0, sizeof(i2c_info));
725 bus = pentry->host_num;
726 strncpy(i2c_info.type, pentry->name, SFI_NAME_LEN);
727 i2c_info.irq = pentry->irq;
728 i2c_info.addr = pentry->addr;
729 pr_debug("info[%2d]: I2C bus = %d, name = %16.16s, "
730 "irq = 0x%2x, addr = 0x%x\n", i, bus,
731 i2c_info.type,
732 i2c_info.irq,
733 i2c_info.addr);
734 sfi_handle_i2c_dev(bus, &i2c_info);
735 break;
736 case SFI_DEV_TYPE_UART:
737 case SFI_DEV_TYPE_HSI:
738 default:
739 ;
740 }
741 }
742 return 0;
743}
744
745static int __init mrst_platform_init(void)
746{
747 sfi_table_parse(SFI_SIG_GPIO, NULL, NULL, sfi_parse_gpio);
748 sfi_table_parse(SFI_SIG_DEVS, NULL, NULL, sfi_parse_devs);
749 return 0;
750}
751arch_initcall(mrst_platform_init);
752
753/*
754 * we will search these buttons in SFI GPIO table (by name)
755 * and register them dynamically. Please add all possible
756 * buttons here, we will shrink them if no GPIO found.
757 */
758static struct gpio_keys_button gpio_button[] = {
759 {KEY_POWER, -1, 1, "power_btn", EV_KEY, 0, 3000},
760 {KEY_PROG1, -1, 1, "prog_btn1", EV_KEY, 0, 20},
761 {KEY_PROG2, -1, 1, "prog_btn2", EV_KEY, 0, 20},
762 {SW_LID, -1, 1, "lid_switch", EV_SW, 0, 20},
763 {KEY_VOLUMEUP, -1, 1, "vol_up", EV_KEY, 0, 20},
764 {KEY_VOLUMEDOWN, -1, 1, "vol_down", EV_KEY, 0, 20},
765 {KEY_CAMERA, -1, 1, "camera_full", EV_KEY, 0, 20},
766 {KEY_CAMERA_FOCUS, -1, 1, "camera_half", EV_KEY, 0, 20},
767 {SW_KEYPAD_SLIDE, -1, 1, "MagSw1", EV_SW, 0, 20},
768 {SW_KEYPAD_SLIDE, -1, 1, "MagSw2", EV_SW, 0, 20},
769};
770
771static struct gpio_keys_platform_data mrst_gpio_keys = {
772 .buttons = gpio_button,
773 .rep = 1,
774 .nbuttons = -1, /* will fill it after search */
775};
776
777static struct platform_device pb_device = {
778 .name = "gpio-keys",
779 .id = -1,
780 .dev = {
781 .platform_data = &mrst_gpio_keys,
782 },
783};
784
785/*
786 * Shrink the non-existent buttons, register the gpio button
787 * device if there is some
788 */
789static int __init pb_keys_init(void)
790{
791 struct gpio_keys_button *gb = gpio_button;
792 int i, num, good = 0;
793
794 num = sizeof(gpio_button) / sizeof(struct gpio_keys_button);
795 for (i = 0; i < num; i++) {
796 gb[i].gpio = get_gpio_by_name(gb[i].desc);
797 if (gb[i].gpio == -1)
798 continue;
799
800 if (i != good)
801 gb[good] = gb[i];
802 good++;
803 }
804
805 if (good) {
806 mrst_gpio_keys.nbuttons = good;
807 return platform_device_register(&pb_device);
808 }
809 return 0;
810}
811late_initcall(pb_keys_init);
diff --git a/arch/x86/platform/mrst/vrtc.c b/arch/x86/platform/mrst/vrtc.c
new file mode 100644
index 000000000000..73d70d65e76e
--- /dev/null
+++ b/arch/x86/platform/mrst/vrtc.c
@@ -0,0 +1,159 @@
1/*
2 * vrtc.c: Driver for virtual RTC device on Intel MID platform
3 *
4 * (C) Copyright 2009 Intel Corporation
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; version 2
9 * of the License.
10 *
11 * Note:
12 * VRTC is emulated by system controller firmware, the real HW
13 * RTC is located in the PMIC device. SCU FW shadows PMIC RTC
14 * in a memory mapped IO space that is visible to the host IA
15 * processor.
16 *
17 * This driver is based on RTC CMOS driver.
18 */
19
20#include <linux/kernel.h>
21#include <linux/init.h>
22#include <linux/sfi.h>
23#include <linux/platform_device.h>
24
25#include <asm/mrst.h>
26#include <asm/mrst-vrtc.h>
27#include <asm/time.h>
28#include <asm/fixmap.h>
29
30static unsigned char __iomem *vrtc_virt_base;
31
32unsigned char vrtc_cmos_read(unsigned char reg)
33{
34 unsigned char retval;
35
36 /* vRTC's registers range from 0x0 to 0xD */
37 if (reg > 0xd || !vrtc_virt_base)
38 return 0xff;
39
40 lock_cmos_prefix(reg);
41 retval = __raw_readb(vrtc_virt_base + (reg << 2));
42 lock_cmos_suffix(reg);
43 return retval;
44}
45EXPORT_SYMBOL_GPL(vrtc_cmos_read);
46
47void vrtc_cmos_write(unsigned char val, unsigned char reg)
48{
49 if (reg > 0xd || !vrtc_virt_base)
50 return;
51
52 lock_cmos_prefix(reg);
53 __raw_writeb(val, vrtc_virt_base + (reg << 2));
54 lock_cmos_suffix(reg);
55}
56EXPORT_SYMBOL_GPL(vrtc_cmos_write);
57
58unsigned long vrtc_get_time(void)
59{
60 u8 sec, min, hour, mday, mon;
61 u32 year;
62
63 while ((vrtc_cmos_read(RTC_FREQ_SELECT) & RTC_UIP))
64 cpu_relax();
65
66 sec = vrtc_cmos_read(RTC_SECONDS);
67 min = vrtc_cmos_read(RTC_MINUTES);
68 hour = vrtc_cmos_read(RTC_HOURS);
69 mday = vrtc_cmos_read(RTC_DAY_OF_MONTH);
70 mon = vrtc_cmos_read(RTC_MONTH);
71 year = vrtc_cmos_read(RTC_YEAR);
72
73 /* vRTC YEAR reg contains the offset to 1960 */
74 year += 1960;
75
76 printk(KERN_INFO "vRTC: sec: %d min: %d hour: %d day: %d "
77 "mon: %d year: %d\n", sec, min, hour, mday, mon, year);
78
79 return mktime(year, mon, mday, hour, min, sec);
80}
81
82/* Only care about the minutes and seconds */
83int vrtc_set_mmss(unsigned long nowtime)
84{
85 int real_sec, real_min;
86 int vrtc_min;
87
88 vrtc_min = vrtc_cmos_read(RTC_MINUTES);
89
90 real_sec = nowtime % 60;
91 real_min = nowtime / 60;
92 if (((abs(real_min - vrtc_min) + 15)/30) & 1)
93 real_min += 30;
94 real_min %= 60;
95
96 vrtc_cmos_write(real_sec, RTC_SECONDS);
97 vrtc_cmos_write(real_min, RTC_MINUTES);
98 return 0;
99}
100
101void __init mrst_rtc_init(void)
102{
103 unsigned long vrtc_paddr;
104
105 sfi_table_parse(SFI_SIG_MRTC, NULL, NULL, sfi_parse_mrtc);
106
107 vrtc_paddr = sfi_mrtc_array[0].phys_addr;
108 if (!sfi_mrtc_num || !vrtc_paddr)
109 return;
110
111 vrtc_virt_base = (void __iomem *)set_fixmap_offset_nocache(FIX_LNW_VRTC,
112 vrtc_paddr);
113 x86_platform.get_wallclock = vrtc_get_time;
114 x86_platform.set_wallclock = vrtc_set_mmss;
115}
116
117/*
118 * The Moorestown platform has a memory mapped virtual RTC device that emulates
119 * the programming interface of the RTC.
120 */
121
122static struct resource vrtc_resources[] = {
123 [0] = {
124 .flags = IORESOURCE_MEM,
125 },
126 [1] = {
127 .flags = IORESOURCE_IRQ,
128 }
129};
130
131static struct platform_device vrtc_device = {
132 .name = "rtc_mrst",
133 .id = -1,
134 .resource = vrtc_resources,
135 .num_resources = ARRAY_SIZE(vrtc_resources),
136};
137
138/* Register the RTC device if appropriate */
139static int __init mrst_device_create(void)
140{
141 /* No Moorestown, no device */
142 if (!mrst_identify_cpu())
143 return -ENODEV;
144 /* No timer, no device */
145 if (!sfi_mrtc_num)
146 return -ENODEV;
147
148 /* iomem resource */
149 vrtc_resources[0].start = sfi_mrtc_array[0].phys_addr;
150 vrtc_resources[0].end = sfi_mrtc_array[0].phys_addr +
151 MRST_VRTC_MAP_SZ;
152 /* irq resource */
153 vrtc_resources[1].start = sfi_mrtc_array[0].irq;
154 vrtc_resources[1].end = sfi_mrtc_array[0].irq;
155
156 return platform_device_register(&vrtc_device);
157}
158
159module_init(mrst_device_create);
diff --git a/arch/x86/platform/olpc/Makefile b/arch/x86/platform/olpc/Makefile
new file mode 100644
index 000000000000..81c5e2165c24
--- /dev/null
+++ b/arch/x86/platform/olpc/Makefile
@@ -0,0 +1,2 @@
1obj-$(CONFIG_OLPC) += olpc.o olpc_ofw.o olpc_dt.o
2obj-$(CONFIG_OLPC_XO1) += olpc-xo1.o
diff --git a/arch/x86/platform/olpc/olpc-xo1.c b/arch/x86/platform/olpc/olpc-xo1.c
new file mode 100644
index 000000000000..ab81fb271760
--- /dev/null
+++ b/arch/x86/platform/olpc/olpc-xo1.c
@@ -0,0 +1,146 @@
1/*
2 * Support for features of the OLPC XO-1 laptop
3 *
4 * Copyright (C) 2010 Andres Salomon <dilinger@queued.net>
5 * Copyright (C) 2010 One Laptop per Child
6 * Copyright (C) 2006 Red Hat, Inc.
7 * Copyright (C) 2006 Advanced Micro Devices, Inc.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 */
14
15#include <linux/module.h>
16#include <linux/platform_device.h>
17#include <linux/pm.h>
18#include <linux/mfd/core.h>
19
20#include <asm/io.h>
21#include <asm/olpc.h>
22
23#define DRV_NAME "olpc-xo1"
24
25/* PMC registers (PMS block) */
26#define PM_SCLK 0x10
27#define PM_IN_SLPCTL 0x20
28#define PM_WKXD 0x34
29#define PM_WKD 0x30
30#define PM_SSC 0x54
31
32/* PM registers (ACPI block) */
33#define PM1_CNT 0x08
34#define PM_GPE0_STS 0x18
35
36static unsigned long acpi_base;
37static unsigned long pms_base;
38
39static void xo1_power_off(void)
40{
41 printk(KERN_INFO "OLPC XO-1 power off sequence...\n");
42
43 /* Enable all of these controls with 0 delay */
44 outl(0x40000000, pms_base + PM_SCLK);
45 outl(0x40000000, pms_base + PM_IN_SLPCTL);
46 outl(0x40000000, pms_base + PM_WKXD);
47 outl(0x40000000, pms_base + PM_WKD);
48
49 /* Clear status bits (possibly unnecessary) */
50 outl(0x0002ffff, pms_base + PM_SSC);
51 outl(0xffffffff, acpi_base + PM_GPE0_STS);
52
53 /* Write SLP_EN bit to start the machinery */
54 outl(0x00002000, acpi_base + PM1_CNT);
55}
56
57static int __devinit olpc_xo1_probe(struct platform_device *pdev)
58{
59 struct resource *res;
60 int err;
61
62 /* don't run on non-XOs */
63 if (!machine_is_olpc())
64 return -ENODEV;
65
66 err = mfd_cell_enable(pdev);
67 if (err)
68 return err;
69
70 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
71 if (!res) {
72 dev_err(&pdev->dev, "can't fetch device resource info\n");
73 return -EIO;
74 }
75 if (strcmp(pdev->name, "cs5535-pms") == 0)
76 pms_base = res->start;
77 else if (strcmp(pdev->name, "olpc-xo1-pm-acpi") == 0)
78 acpi_base = res->start;
79
80 /* If we have both addresses, we can override the poweroff hook */
81 if (pms_base && acpi_base) {
82 pm_power_off = xo1_power_off;
83 printk(KERN_INFO "OLPC XO-1 support registered\n");
84 }
85
86 return 0;
87}
88
89static int __devexit olpc_xo1_remove(struct platform_device *pdev)
90{
91 mfd_cell_disable(pdev);
92
93 if (strcmp(pdev->name, "cs5535-pms") == 0)
94 pms_base = 0;
95 else if (strcmp(pdev->name, "olpc-xo1-pm-acpi") == 0)
96 acpi_base = 0;
97
98 pm_power_off = NULL;
99 return 0;
100}
101
102static struct platform_driver cs5535_pms_drv = {
103 .driver = {
104 .name = "cs5535-pms",
105 .owner = THIS_MODULE,
106 },
107 .probe = olpc_xo1_probe,
108 .remove = __devexit_p(olpc_xo1_remove),
109};
110
111static struct platform_driver cs5535_acpi_drv = {
112 .driver = {
113 .name = "olpc-xo1-pm-acpi",
114 .owner = THIS_MODULE,
115 },
116 .probe = olpc_xo1_probe,
117 .remove = __devexit_p(olpc_xo1_remove),
118};
119
120static int __init olpc_xo1_init(void)
121{
122 int r;
123
124 r = platform_driver_register(&cs5535_pms_drv);
125 if (r)
126 return r;
127
128 r = platform_driver_register(&cs5535_acpi_drv);
129 if (r)
130 platform_driver_unregister(&cs5535_pms_drv);
131
132 return r;
133}
134
135static void __exit olpc_xo1_exit(void)
136{
137 platform_driver_unregister(&cs5535_acpi_drv);
138 platform_driver_unregister(&cs5535_pms_drv);
139}
140
141MODULE_AUTHOR("Daniel Drake <dsd@laptop.org>");
142MODULE_LICENSE("GPL");
143MODULE_ALIAS("platform:cs5535-pms");
144
145module_init(olpc_xo1_init);
146module_exit(olpc_xo1_exit);
diff --git a/arch/x86/platform/olpc/olpc.c b/arch/x86/platform/olpc/olpc.c
new file mode 100644
index 000000000000..0060fd59ea00
--- /dev/null
+++ b/arch/x86/platform/olpc/olpc.c
@@ -0,0 +1,284 @@
1/*
2 * Support for the OLPC DCON and OLPC EC access
3 *
4 * Copyright © 2006 Advanced Micro Devices, Inc.
5 * Copyright © 2007-2008 Andres Salomon <dilinger@debian.org>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 */
12
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/module.h>
16#include <linux/delay.h>
17#include <linux/spinlock.h>
18#include <linux/io.h>
19#include <linux/string.h>
20#include <linux/platform_device.h>
21#include <linux/of.h>
22
23#include <asm/geode.h>
24#include <asm/setup.h>
25#include <asm/olpc.h>
26#include <asm/olpc_ofw.h>
27
28struct olpc_platform_t olpc_platform_info;
29EXPORT_SYMBOL_GPL(olpc_platform_info);
30
31static DEFINE_SPINLOCK(ec_lock);
32
33/* what the timeout *should* be (in ms) */
34#define EC_BASE_TIMEOUT 20
35
36/* the timeout that bugs in the EC might force us to actually use */
37static int ec_timeout = EC_BASE_TIMEOUT;
38
39static int __init olpc_ec_timeout_set(char *str)
40{
41 if (get_option(&str, &ec_timeout) != 1) {
42 ec_timeout = EC_BASE_TIMEOUT;
43 printk(KERN_ERR "olpc-ec: invalid argument to "
44 "'olpc_ec_timeout=', ignoring!\n");
45 }
46 printk(KERN_DEBUG "olpc-ec: using %d ms delay for EC commands.\n",
47 ec_timeout);
48 return 1;
49}
50__setup("olpc_ec_timeout=", olpc_ec_timeout_set);
51
52/*
53 * These {i,o}bf_status functions return whether the buffers are full or not.
54 */
55
56static inline unsigned int ibf_status(unsigned int port)
57{
58 return !!(inb(port) & 0x02);
59}
60
61static inline unsigned int obf_status(unsigned int port)
62{
63 return inb(port) & 0x01;
64}
65
66#define wait_on_ibf(p, d) __wait_on_ibf(__LINE__, (p), (d))
67static int __wait_on_ibf(unsigned int line, unsigned int port, int desired)
68{
69 unsigned int timeo;
70 int state = ibf_status(port);
71
72 for (timeo = ec_timeout; state != desired && timeo; timeo--) {
73 mdelay(1);
74 state = ibf_status(port);
75 }
76
77 if ((state == desired) && (ec_timeout > EC_BASE_TIMEOUT) &&
78 timeo < (ec_timeout - EC_BASE_TIMEOUT)) {
79 printk(KERN_WARNING "olpc-ec: %d: waited %u ms for IBF!\n",
80 line, ec_timeout - timeo);
81 }
82
83 return !(state == desired);
84}
85
86#define wait_on_obf(p, d) __wait_on_obf(__LINE__, (p), (d))
87static int __wait_on_obf(unsigned int line, unsigned int port, int desired)
88{
89 unsigned int timeo;
90 int state = obf_status(port);
91
92 for (timeo = ec_timeout; state != desired && timeo; timeo--) {
93 mdelay(1);
94 state = obf_status(port);
95 }
96
97 if ((state == desired) && (ec_timeout > EC_BASE_TIMEOUT) &&
98 timeo < (ec_timeout - EC_BASE_TIMEOUT)) {
99 printk(KERN_WARNING "olpc-ec: %d: waited %u ms for OBF!\n",
100 line, ec_timeout - timeo);
101 }
102
103 return !(state == desired);
104}
105
106/*
107 * This allows the kernel to run Embedded Controller commands. The EC is
108 * documented at <http://wiki.laptop.org/go/Embedded_controller>, and the
109 * available EC commands are here:
110 * <http://wiki.laptop.org/go/Ec_specification>. Unfortunately, while
111 * OpenFirmware's source is available, the EC's is not.
112 */
113int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen,
114 unsigned char *outbuf, size_t outlen)
115{
116 unsigned long flags;
117 int ret = -EIO;
118 int i;
119 int restarts = 0;
120
121 spin_lock_irqsave(&ec_lock, flags);
122
123 /* Clear OBF */
124 for (i = 0; i < 10 && (obf_status(0x6c) == 1); i++)
125 inb(0x68);
126 if (i == 10) {
127 printk(KERN_ERR "olpc-ec: timeout while attempting to "
128 "clear OBF flag!\n");
129 goto err;
130 }
131
132 if (wait_on_ibf(0x6c, 0)) {
133 printk(KERN_ERR "olpc-ec: timeout waiting for EC to "
134 "quiesce!\n");
135 goto err;
136 }
137
138restart:
139 /*
140 * Note that if we time out during any IBF checks, that's a failure;
141 * we have to return. There's no way for the kernel to clear that.
142 *
143 * If we time out during an OBF check, we can restart the command;
144 * reissuing it will clear the OBF flag, and we should be alright.
145 * The OBF flag will sometimes misbehave due to what we believe
146 * is a hardware quirk..
147 */
148 pr_devel("olpc-ec: running cmd 0x%x\n", cmd);
149 outb(cmd, 0x6c);
150
151 if (wait_on_ibf(0x6c, 0)) {
152 printk(KERN_ERR "olpc-ec: timeout waiting for EC to read "
153 "command!\n");
154 goto err;
155 }
156
157 if (inbuf && inlen) {
158 /* write data to EC */
159 for (i = 0; i < inlen; i++) {
160 if (wait_on_ibf(0x6c, 0)) {
161 printk(KERN_ERR "olpc-ec: timeout waiting for"
162 " EC accept data!\n");
163 goto err;
164 }
165 pr_devel("olpc-ec: sending cmd arg 0x%x\n", inbuf[i]);
166 outb(inbuf[i], 0x68);
167 }
168 }
169 if (outbuf && outlen) {
170 /* read data from EC */
171 for (i = 0; i < outlen; i++) {
172 if (wait_on_obf(0x6c, 1)) {
173 printk(KERN_ERR "olpc-ec: timeout waiting for"
174 " EC to provide data!\n");
175 if (restarts++ < 10)
176 goto restart;
177 goto err;
178 }
179 outbuf[i] = inb(0x68);
180 pr_devel("olpc-ec: received 0x%x\n", outbuf[i]);
181 }
182 }
183
184 ret = 0;
185err:
186 spin_unlock_irqrestore(&ec_lock, flags);
187 return ret;
188}
189EXPORT_SYMBOL_GPL(olpc_ec_cmd);
190
191static bool __init check_ofw_architecture(struct device_node *root)
192{
193 const char *olpc_arch;
194 int propsize;
195
196 olpc_arch = of_get_property(root, "architecture", &propsize);
197 return propsize == 5 && strncmp("OLPC", olpc_arch, 5) == 0;
198}
199
200static u32 __init get_board_revision(struct device_node *root)
201{
202 int propsize;
203 const __be32 *rev;
204
205 rev = of_get_property(root, "board-revision-int", &propsize);
206 if (propsize != 4)
207 return 0;
208
209 return be32_to_cpu(*rev);
210}
211
212static bool __init platform_detect(void)
213{
214 struct device_node *root = of_find_node_by_path("/");
215 bool success;
216
217 if (!root)
218 return false;
219
220 success = check_ofw_architecture(root);
221 if (success) {
222 olpc_platform_info.boardrev = get_board_revision(root);
223 olpc_platform_info.flags |= OLPC_F_PRESENT;
224 }
225
226 of_node_put(root);
227 return success;
228}
229
230static int __init add_xo1_platform_devices(void)
231{
232 struct platform_device *pdev;
233
234 pdev = platform_device_register_simple("xo1-rfkill", -1, NULL, 0);
235 if (IS_ERR(pdev))
236 return PTR_ERR(pdev);
237
238 pdev = platform_device_register_simple("olpc-xo1", -1, NULL, 0);
239 if (IS_ERR(pdev))
240 return PTR_ERR(pdev);
241
242 return 0;
243}
244
245static int __init olpc_init(void)
246{
247 int r = 0;
248
249 if (!olpc_ofw_present() || !platform_detect())
250 return 0;
251
252 spin_lock_init(&ec_lock);
253
254 /* assume B1 and above models always have a DCON */
255 if (olpc_board_at_least(olpc_board(0xb1)))
256 olpc_platform_info.flags |= OLPC_F_DCON;
257
258 /* get the EC revision */
259 olpc_ec_cmd(EC_FIRMWARE_REV, NULL, 0,
260 (unsigned char *) &olpc_platform_info.ecver, 1);
261
262#ifdef CONFIG_PCI_OLPC
263 /* If the VSA exists let it emulate PCI, if not emulate in kernel.
264 * XO-1 only. */
265 if (olpc_platform_info.boardrev < olpc_board_pre(0xd0) &&
266 !cs5535_has_vsa2())
267 x86_init.pci.arch_init = pci_olpc_init;
268#endif
269
270 printk(KERN_INFO "OLPC board revision %s%X (EC=%x)\n",
271 ((olpc_platform_info.boardrev & 0xf) < 8) ? "pre" : "",
272 olpc_platform_info.boardrev >> 4,
273 olpc_platform_info.ecver);
274
275 if (olpc_platform_info.boardrev < olpc_board_pre(0xd0)) { /* XO-1 */
276 r = add_xo1_platform_devices();
277 if (r)
278 return r;
279 }
280
281 return 0;
282}
283
284postcore_initcall(olpc_init);
diff --git a/arch/x86/platform/olpc/olpc_dt.c b/arch/x86/platform/olpc/olpc_dt.c
new file mode 100644
index 000000000000..d39f63d017d2
--- /dev/null
+++ b/arch/x86/platform/olpc/olpc_dt.c
@@ -0,0 +1,201 @@
1/*
2 * OLPC-specific OFW device tree support code.
3 *
4 * Paul Mackerras August 1996.
5 * Copyright (C) 1996-2005 Paul Mackerras.
6 *
7 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
8 * {engebret|bergner}@us.ibm.com
9 *
10 * Adapted for sparc by David S. Miller davem@davemloft.net
11 * Adapted for x86/OLPC by Andres Salomon <dilinger@queued.net>
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
17 */
18
19#include <linux/kernel.h>
20#include <linux/bootmem.h>
21#include <linux/of.h>
22#include <linux/of_platform.h>
23#include <linux/of_pdt.h>
24#include <asm/olpc.h>
25#include <asm/olpc_ofw.h>
26
27static phandle __init olpc_dt_getsibling(phandle node)
28{
29 const void *args[] = { (void *)node };
30 void *res[] = { &node };
31
32 if ((s32)node == -1)
33 return 0;
34
35 if (olpc_ofw("peer", args, res) || (s32)node == -1)
36 return 0;
37
38 return node;
39}
40
41static phandle __init olpc_dt_getchild(phandle node)
42{
43 const void *args[] = { (void *)node };
44 void *res[] = { &node };
45
46 if ((s32)node == -1)
47 return 0;
48
49 if (olpc_ofw("child", args, res) || (s32)node == -1) {
50 pr_err("PROM: %s: fetching child failed!\n", __func__);
51 return 0;
52 }
53
54 return node;
55}
56
57static int __init olpc_dt_getproplen(phandle node, const char *prop)
58{
59 const void *args[] = { (void *)node, prop };
60 int len;
61 void *res[] = { &len };
62
63 if ((s32)node == -1)
64 return -1;
65
66 if (olpc_ofw("getproplen", args, res)) {
67 pr_err("PROM: %s: getproplen failed!\n", __func__);
68 return -1;
69 }
70
71 return len;
72}
73
74static int __init olpc_dt_getproperty(phandle node, const char *prop,
75 char *buf, int bufsize)
76{
77 int plen;
78
79 plen = olpc_dt_getproplen(node, prop);
80 if (plen > bufsize || plen < 1) {
81 return -1;
82 } else {
83 const void *args[] = { (void *)node, prop, buf, (void *)plen };
84 void *res[] = { &plen };
85
86 if (olpc_ofw("getprop", args, res)) {
87 pr_err("PROM: %s: getprop failed!\n", __func__);
88 return -1;
89 }
90 }
91
92 return plen;
93}
94
95static int __init olpc_dt_nextprop(phandle node, char *prev, char *buf)
96{
97 const void *args[] = { (void *)node, prev, buf };
98 int success;
99 void *res[] = { &success };
100
101 buf[0] = '\0';
102
103 if ((s32)node == -1)
104 return -1;
105
106 if (olpc_ofw("nextprop", args, res) || success != 1)
107 return -1;
108
109 return 0;
110}
111
112static int __init olpc_dt_pkg2path(phandle node, char *buf,
113 const int buflen, int *len)
114{
115 const void *args[] = { (void *)node, buf, (void *)buflen };
116 void *res[] = { len };
117
118 if ((s32)node == -1)
119 return -1;
120
121 if (olpc_ofw("package-to-path", args, res) || *len < 1)
122 return -1;
123
124 return 0;
125}
126
127static unsigned int prom_early_allocated __initdata;
128
129void * __init prom_early_alloc(unsigned long size)
130{
131 static u8 *mem;
132 static size_t free_mem;
133 void *res;
134
135 if (free_mem < size) {
136 const size_t chunk_size = max(PAGE_SIZE, size);
137
138 /*
139 * To mimimize the number of allocations, grab at least
140 * PAGE_SIZE of memory (that's an arbitrary choice that's
141 * fast enough on the platforms we care about while minimizing
142 * wasted bootmem) and hand off chunks of it to callers.
143 */
144 res = alloc_bootmem(chunk_size);
145 BUG_ON(!res);
146 prom_early_allocated += chunk_size;
147 memset(res, 0, chunk_size);
148 free_mem = chunk_size;
149 mem = res;
150 }
151
152 /* allocate from the local cache */
153 free_mem -= size;
154 res = mem;
155 mem += size;
156 return res;
157}
158
159static struct of_pdt_ops prom_olpc_ops __initdata = {
160 .nextprop = olpc_dt_nextprop,
161 .getproplen = olpc_dt_getproplen,
162 .getproperty = olpc_dt_getproperty,
163 .getchild = olpc_dt_getchild,
164 .getsibling = olpc_dt_getsibling,
165 .pkg2path = olpc_dt_pkg2path,
166};
167
168void __init olpc_dt_build_devicetree(void)
169{
170 phandle root;
171
172 if (!olpc_ofw_is_installed())
173 return;
174
175 root = olpc_dt_getsibling(0);
176 if (!root) {
177 pr_err("PROM: unable to get root node from OFW!\n");
178 return;
179 }
180 of_pdt_build_devicetree(root, &prom_olpc_ops);
181
182 pr_info("PROM DT: Built device tree with %u bytes of memory.\n",
183 prom_early_allocated);
184}
185
186/* A list of DT node/bus matches that we want to expose as platform devices */
187static struct of_device_id __initdata of_ids[] = {
188 { .compatible = "olpc,xo1-battery" },
189 { .compatible = "olpc,xo1-dcon" },
190 { .compatible = "olpc,xo1-rtc" },
191 {},
192};
193
194static int __init olpc_create_platform_devices(void)
195{
196 if (machine_is_olpc())
197 return of_platform_bus_probe(NULL, of_ids, NULL);
198 else
199 return 0;
200}
201device_initcall(olpc_create_platform_devices);
diff --git a/arch/x86/platform/olpc/olpc_ofw.c b/arch/x86/platform/olpc/olpc_ofw.c
new file mode 100644
index 000000000000..e7604f62870d
--- /dev/null
+++ b/arch/x86/platform/olpc/olpc_ofw.c
@@ -0,0 +1,117 @@
1#include <linux/kernel.h>
2#include <linux/module.h>
3#include <linux/init.h>
4#include <asm/page.h>
5#include <asm/setup.h>
6#include <asm/io.h>
7#include <asm/pgtable.h>
8#include <asm/olpc_ofw.h>
9
10/* address of OFW callback interface; will be NULL if OFW isn't found */
11static int (*olpc_ofw_cif)(int *);
12
13/* page dir entry containing OFW's pgdir table; filled in by head_32.S */
14u32 olpc_ofw_pgd __initdata;
15
16static DEFINE_SPINLOCK(ofw_lock);
17
18#define MAXARGS 10
19
20void __init setup_olpc_ofw_pgd(void)
21{
22 pgd_t *base, *ofw_pde;
23
24 if (!olpc_ofw_cif)
25 return;
26
27 /* fetch OFW's PDE */
28 base = early_ioremap(olpc_ofw_pgd, sizeof(olpc_ofw_pgd) * PTRS_PER_PGD);
29 if (!base) {
30 printk(KERN_ERR "failed to remap OFW's pgd - disabling OFW!\n");
31 olpc_ofw_cif = NULL;
32 return;
33 }
34 ofw_pde = &base[OLPC_OFW_PDE_NR];
35
36 /* install OFW's PDE permanently into the kernel's pgtable */
37 set_pgd(&swapper_pg_dir[OLPC_OFW_PDE_NR], *ofw_pde);
38 /* implicit optimization barrier here due to uninline function return */
39
40 early_iounmap(base, sizeof(olpc_ofw_pgd) * PTRS_PER_PGD);
41}
42
43int __olpc_ofw(const char *name, int nr_args, const void **args, int nr_res,
44 void **res)
45{
46 int ofw_args[MAXARGS + 3];
47 unsigned long flags;
48 int ret, i, *p;
49
50 BUG_ON(nr_args + nr_res > MAXARGS);
51
52 if (!olpc_ofw_cif)
53 return -EIO;
54
55 ofw_args[0] = (int)name;
56 ofw_args[1] = nr_args;
57 ofw_args[2] = nr_res;
58
59 p = &ofw_args[3];
60 for (i = 0; i < nr_args; i++, p++)
61 *p = (int)args[i];
62
63 /* call into ofw */
64 spin_lock_irqsave(&ofw_lock, flags);
65 ret = olpc_ofw_cif(ofw_args);
66 spin_unlock_irqrestore(&ofw_lock, flags);
67
68 if (!ret) {
69 for (i = 0; i < nr_res; i++, p++)
70 *((int *)res[i]) = *p;
71 }
72
73 return ret;
74}
75EXPORT_SYMBOL_GPL(__olpc_ofw);
76
77bool olpc_ofw_present(void)
78{
79 return olpc_ofw_cif != NULL;
80}
81EXPORT_SYMBOL_GPL(olpc_ofw_present);
82
83/* OFW cif _should_ be above this address */
84#define OFW_MIN 0xff000000
85
86/* OFW starts on a 1MB boundary */
87#define OFW_BOUND (1<<20)
88
89void __init olpc_ofw_detect(void)
90{
91 struct olpc_ofw_header *hdr = &boot_params.olpc_ofw_header;
92 unsigned long start;
93
94 /* ensure OFW booted us by checking for "OFW " string */
95 if (hdr->ofw_magic != OLPC_OFW_SIG)
96 return;
97
98 olpc_ofw_cif = (int (*)(int *))hdr->cif_handler;
99
100 if ((unsigned long)olpc_ofw_cif < OFW_MIN) {
101 printk(KERN_ERR "OFW detected, but cif has invalid address 0x%lx - disabling.\n",
102 (unsigned long)olpc_ofw_cif);
103 olpc_ofw_cif = NULL;
104 return;
105 }
106
107 /* determine where OFW starts in memory */
108 start = round_down((unsigned long)olpc_ofw_cif, OFW_BOUND);
109 printk(KERN_INFO "OFW detected in memory, cif @ 0x%lx (reserving top %ldMB)\n",
110 (unsigned long)olpc_ofw_cif, (-start) >> 20);
111 reserve_top_address(-start);
112}
113
114bool __init olpc_ofw_is_installed(void)
115{
116 return olpc_ofw_cif != NULL;
117}
diff --git a/arch/x86/platform/scx200/Makefile b/arch/x86/platform/scx200/Makefile
new file mode 100644
index 000000000000..762b4c7f4314
--- /dev/null
+++ b/arch/x86/platform/scx200/Makefile
@@ -0,0 +1,2 @@
1obj-$(CONFIG_SCx200) += scx200.o
2scx200-y += scx200_32.o
diff --git a/arch/x86/platform/scx200/scx200_32.c b/arch/x86/platform/scx200/scx200_32.c
new file mode 100644
index 000000000000..7e004acbe526
--- /dev/null
+++ b/arch/x86/platform/scx200/scx200_32.c
@@ -0,0 +1,131 @@
1/*
2 * Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
3 *
4 * National Semiconductor SCx200 support.
5 */
6
7#include <linux/module.h>
8#include <linux/errno.h>
9#include <linux/kernel.h>
10#include <linux/init.h>
11#include <linux/mutex.h>
12#include <linux/pci.h>
13
14#include <linux/scx200.h>
15#include <linux/scx200_gpio.h>
16
17/* Verify that the configuration block really is there */
18#define scx200_cb_probe(base) (inw((base) + SCx200_CBA) == (base))
19
20#define NAME "scx200"
21
22MODULE_AUTHOR("Christer Weinigel <wingel@nano-system.com>");
23MODULE_DESCRIPTION("NatSemi SCx200 Driver");
24MODULE_LICENSE("GPL");
25
26unsigned scx200_gpio_base = 0;
27unsigned long scx200_gpio_shadow[2];
28
29unsigned scx200_cb_base = 0;
30
31static struct pci_device_id scx200_tbl[] = {
32 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SCx200_BRIDGE) },
33 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_BRIDGE) },
34 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SCx200_XBUS) },
35 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_XBUS) },
36 { },
37};
38MODULE_DEVICE_TABLE(pci,scx200_tbl);
39
40static int __devinit scx200_probe(struct pci_dev *, const struct pci_device_id *);
41
42static struct pci_driver scx200_pci_driver = {
43 .name = "scx200",
44 .id_table = scx200_tbl,
45 .probe = scx200_probe,
46};
47
48static DEFINE_MUTEX(scx200_gpio_config_lock);
49
50static void __devinit scx200_init_shadow(void)
51{
52 int bank;
53
54 /* read the current values driven on the GPIO signals */
55 for (bank = 0; bank < 2; ++bank)
56 scx200_gpio_shadow[bank] = inl(scx200_gpio_base + 0x10 * bank);
57}
58
59static int __devinit scx200_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
60{
61 unsigned base;
62
63 if (pdev->device == PCI_DEVICE_ID_NS_SCx200_BRIDGE ||
64 pdev->device == PCI_DEVICE_ID_NS_SC1100_BRIDGE) {
65 base = pci_resource_start(pdev, 0);
66 printk(KERN_INFO NAME ": GPIO base 0x%x\n", base);
67
68 if (!request_region(base, SCx200_GPIO_SIZE, "NatSemi SCx200 GPIO")) {
69 printk(KERN_ERR NAME ": can't allocate I/O for GPIOs\n");
70 return -EBUSY;
71 }
72
73 scx200_gpio_base = base;
74 scx200_init_shadow();
75
76 } else {
77 /* find the base of the Configuration Block */
78 if (scx200_cb_probe(SCx200_CB_BASE_FIXED)) {
79 scx200_cb_base = SCx200_CB_BASE_FIXED;
80 } else {
81 pci_read_config_dword(pdev, SCx200_CBA_SCRATCH, &base);
82 if (scx200_cb_probe(base)) {
83 scx200_cb_base = base;
84 } else {
85 printk(KERN_WARNING NAME ": Configuration Block not found\n");
86 return -ENODEV;
87 }
88 }
89 printk(KERN_INFO NAME ": Configuration Block base 0x%x\n", scx200_cb_base);
90 }
91
92 return 0;
93}
94
95u32 scx200_gpio_configure(unsigned index, u32 mask, u32 bits)
96{
97 u32 config, new_config;
98
99 mutex_lock(&scx200_gpio_config_lock);
100
101 outl(index, scx200_gpio_base + 0x20);
102 config = inl(scx200_gpio_base + 0x24);
103
104 new_config = (config & mask) | bits;
105 outl(new_config, scx200_gpio_base + 0x24);
106
107 mutex_unlock(&scx200_gpio_config_lock);
108
109 return config;
110}
111
112static int __init scx200_init(void)
113{
114 printk(KERN_INFO NAME ": NatSemi SCx200 Driver\n");
115
116 return pci_register_driver(&scx200_pci_driver);
117}
118
119static void __exit scx200_cleanup(void)
120{
121 pci_unregister_driver(&scx200_pci_driver);
122 release_region(scx200_gpio_base, SCx200_GPIO_SIZE);
123}
124
125module_init(scx200_init);
126module_exit(scx200_cleanup);
127
128EXPORT_SYMBOL(scx200_gpio_base);
129EXPORT_SYMBOL(scx200_gpio_shadow);
130EXPORT_SYMBOL(scx200_gpio_configure);
131EXPORT_SYMBOL(scx200_cb_base);
diff --git a/arch/x86/platform/sfi/Makefile b/arch/x86/platform/sfi/Makefile
new file mode 100644
index 000000000000..cc5db1168a5e
--- /dev/null
+++ b/arch/x86/platform/sfi/Makefile
@@ -0,0 +1 @@
obj-$(CONFIG_SFI) += sfi.o
diff --git a/arch/x86/platform/sfi/sfi.c b/arch/x86/platform/sfi/sfi.c
new file mode 100644
index 000000000000..7785b72ecc3a
--- /dev/null
+++ b/arch/x86/platform/sfi/sfi.c
@@ -0,0 +1,109 @@
1/*
2 * sfi.c - x86 architecture SFI support.
3 *
4 * Copyright (c) 2009, Intel Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 */
20
21#define KMSG_COMPONENT "SFI"
22#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
23
24#include <linux/acpi.h>
25#include <linux/init.h>
26#include <linux/sfi.h>
27#include <linux/io.h>
28
29#include <asm/io_apic.h>
30#include <asm/mpspec.h>
31#include <asm/setup.h>
32#include <asm/apic.h>
33
34#ifdef CONFIG_X86_LOCAL_APIC
35static unsigned long sfi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
36
37/* All CPUs enumerated by SFI must be present and enabled */
38static void __cpuinit mp_sfi_register_lapic(u8 id)
39{
40 if (MAX_LOCAL_APIC - id <= 0) {
41 pr_warning("Processor #%d invalid (max %d)\n",
42 id, MAX_LOCAL_APIC);
43 return;
44 }
45
46 pr_info("registering lapic[%d]\n", id);
47
48 generic_processor_info(id, GET_APIC_VERSION(apic_read(APIC_LVR)));
49}
50
51static int __init sfi_parse_cpus(struct sfi_table_header *table)
52{
53 struct sfi_table_simple *sb;
54 struct sfi_cpu_table_entry *pentry;
55 int i;
56 int cpu_num;
57
58 sb = (struct sfi_table_simple *)table;
59 cpu_num = SFI_GET_NUM_ENTRIES(sb, struct sfi_cpu_table_entry);
60 pentry = (struct sfi_cpu_table_entry *)sb->pentry;
61
62 for (i = 0; i < cpu_num; i++) {
63 mp_sfi_register_lapic(pentry->apic_id);
64 pentry++;
65 }
66
67 smp_found_config = 1;
68 return 0;
69}
70#endif /* CONFIG_X86_LOCAL_APIC */
71
72#ifdef CONFIG_X86_IO_APIC
73
74static int __init sfi_parse_ioapic(struct sfi_table_header *table)
75{
76 struct sfi_table_simple *sb;
77 struct sfi_apic_table_entry *pentry;
78 int i, num;
79
80 sb = (struct sfi_table_simple *)table;
81 num = SFI_GET_NUM_ENTRIES(sb, struct sfi_apic_table_entry);
82 pentry = (struct sfi_apic_table_entry *)sb->pentry;
83
84 for (i = 0; i < num; i++) {
85 mp_register_ioapic(i, pentry->phys_addr, gsi_top);
86 pentry++;
87 }
88
89 WARN(pic_mode, KERN_WARNING
90 "SFI: pic_mod shouldn't be 1 when IOAPIC table is present\n");
91 pic_mode = 0;
92 return 0;
93}
94#endif /* CONFIG_X86_IO_APIC */
95
96/*
97 * sfi_platform_init(): register lapics & io-apics
98 */
99int __init sfi_platform_init(void)
100{
101#ifdef CONFIG_X86_LOCAL_APIC
102 register_lapic_address(sfi_lapic_addr);
103 sfi_table_parse(SFI_SIG_CPUS, NULL, NULL, sfi_parse_cpus);
104#endif
105#ifdef CONFIG_X86_IO_APIC
106 sfi_table_parse(SFI_SIG_APIC, NULL, NULL, sfi_parse_ioapic);
107#endif
108 return 0;
109}
diff --git a/arch/x86/platform/uv/Makefile b/arch/x86/platform/uv/Makefile
new file mode 100644
index 000000000000..6c40995fefb8
--- /dev/null
+++ b/arch/x86/platform/uv/Makefile
@@ -0,0 +1 @@
obj-$(CONFIG_X86_UV) += tlb_uv.o bios_uv.o uv_irq.o uv_sysfs.o uv_time.o
diff --git a/arch/x86/platform/uv/bios_uv.c b/arch/x86/platform/uv/bios_uv.c
new file mode 100644
index 000000000000..8bc57baaa9ad
--- /dev/null
+++ b/arch/x86/platform/uv/bios_uv.c
@@ -0,0 +1,215 @@
1/*
2 * BIOS run time interface routines.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved.
19 * Copyright (c) Russ Anderson <rja@sgi.com>
20 */
21
22#include <linux/efi.h>
23#include <asm/efi.h>
24#include <linux/io.h>
25#include <asm/uv/bios.h>
26#include <asm/uv/uv_hub.h>
27
28static struct uv_systab uv_systab;
29
30s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
31{
32 struct uv_systab *tab = &uv_systab;
33 s64 ret;
34
35 if (!tab->function)
36 /*
37 * BIOS does not support UV systab
38 */
39 return BIOS_STATUS_UNIMPLEMENTED;
40
41 ret = efi_call6((void *)__va(tab->function), (u64)which,
42 a1, a2, a3, a4, a5);
43 return ret;
44}
45EXPORT_SYMBOL_GPL(uv_bios_call);
46
47s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
48 u64 a4, u64 a5)
49{
50 unsigned long bios_flags;
51 s64 ret;
52
53 local_irq_save(bios_flags);
54 ret = uv_bios_call(which, a1, a2, a3, a4, a5);
55 local_irq_restore(bios_flags);
56
57 return ret;
58}
59
60s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
61 u64 a4, u64 a5)
62{
63 s64 ret;
64
65 preempt_disable();
66 ret = uv_bios_call(which, a1, a2, a3, a4, a5);
67 preempt_enable();
68
69 return ret;
70}
71
72
73long sn_partition_id;
74EXPORT_SYMBOL_GPL(sn_partition_id);
75long sn_coherency_id;
76EXPORT_SYMBOL_GPL(sn_coherency_id);
77long sn_region_size;
78EXPORT_SYMBOL_GPL(sn_region_size);
79long system_serial_number;
80EXPORT_SYMBOL_GPL(system_serial_number);
81int uv_type;
82EXPORT_SYMBOL_GPL(uv_type);
83
84
85s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
86 long *region, long *ssn)
87{
88 s64 ret;
89 u64 v0, v1;
90 union partition_info_u part;
91
92 ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
93 (u64)(&v0), (u64)(&v1), 0, 0);
94 if (ret != BIOS_STATUS_SUCCESS)
95 return ret;
96
97 part.val = v0;
98 if (uvtype)
99 *uvtype = part.hub_version;
100 if (partid)
101 *partid = part.partition_id;
102 if (coher)
103 *coher = part.coherence_id;
104 if (region)
105 *region = part.region_size;
106 if (ssn)
107 *ssn = v1;
108 return ret;
109}
110EXPORT_SYMBOL_GPL(uv_bios_get_sn_info);
111
112int
113uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
114 unsigned long *intr_mmr_offset)
115{
116 u64 watchlist;
117 s64 ret;
118
119 /*
120 * bios returns watchlist number or negative error number.
121 */
122 ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
123 mq_size, (u64)intr_mmr_offset,
124 (u64)&watchlist, 0);
125 if (ret < BIOS_STATUS_SUCCESS)
126 return ret;
127
128 return watchlist;
129}
130EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
131
132int
133uv_bios_mq_watchlist_free(int blade, int watchlist_num)
134{
135 return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
136 blade, watchlist_num, 0, 0, 0);
137}
138EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
139
140s64
141uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
142{
143 return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
144 perms, 0, 0);
145}
146EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
147
148s64
149uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
150{
151 s64 ret;
152
153 ret = uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
154 (u64)addr, buf, (u64)len, 0);
155 return ret;
156}
157EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
158
159s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
160{
161 return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
162 (u64)ticks_per_second, 0, 0, 0);
163}
164EXPORT_SYMBOL_GPL(uv_bios_freq_base);
165
166/*
167 * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target
168 * @decode: true to enable target, false to disable target
169 * @domain: PCI domain number
170 * @bus: PCI bus number
171 *
172 * Returns:
173 * 0: Success
174 * -EINVAL: Invalid domain or bus number
175 * -ENOSYS: Capability not available
176 * -EBUSY: Legacy VGA I/O cannot be retargeted at this time
177 */
178int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus)
179{
180 return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET,
181 (u64)decode, (u64)domain, (u64)bus, 0, 0);
182}
183EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target);
184
185
186#ifdef CONFIG_EFI
187void uv_bios_init(void)
188{
189 struct uv_systab *tab;
190
191 if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) ||
192 (efi.uv_systab == (unsigned long)NULL)) {
193 printk(KERN_CRIT "No EFI UV System Table.\n");
194 uv_systab.function = (unsigned long)NULL;
195 return;
196 }
197
198 tab = (struct uv_systab *)ioremap(efi.uv_systab,
199 sizeof(struct uv_systab));
200 if (strncmp(tab->signature, "UVST", 4) != 0)
201 printk(KERN_ERR "bad signature in UV system table!");
202
203 /*
204 * Copy table to permanent spot for later use.
205 */
206 memcpy(&uv_systab, tab, sizeof(struct uv_systab));
207 iounmap(tab);
208
209 printk(KERN_INFO "EFI UV System Table Revision %d\n",
210 uv_systab.revision);
211}
212#else /* !CONFIG_EFI */
213
214void uv_bios_init(void) { }
215#endif
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
new file mode 100644
index 000000000000..68e467f69fec
--- /dev/null
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -0,0 +1,1857 @@
1/*
2 * SGI UltraViolet TLB flush routines.
3 *
4 * (c) 2008-2011 Cliff Wickman <cpw@sgi.com>, SGI.
5 *
6 * This code is released under the GNU General Public License version 2 or
7 * later.
8 */
9#include <linux/seq_file.h>
10#include <linux/proc_fs.h>
11#include <linux/debugfs.h>
12#include <linux/kernel.h>
13#include <linux/slab.h>
14#include <linux/delay.h>
15
16#include <asm/mmu_context.h>
17#include <asm/uv/uv.h>
18#include <asm/uv/uv_mmrs.h>
19#include <asm/uv/uv_hub.h>
20#include <asm/uv/uv_bau.h>
21#include <asm/apic.h>
22#include <asm/idle.h>
23#include <asm/tsc.h>
24#include <asm/irq_vectors.h>
25#include <asm/timer.h>
26
27/* timeouts in nanoseconds (indexed by UVH_AGING_PRESCALE_SEL urgency7 30:28) */
28static int timeout_base_ns[] = {
29 20,
30 160,
31 1280,
32 10240,
33 81920,
34 655360,
35 5242880,
36 167772160
37};
38
39static int timeout_us;
40static int nobau;
41static int baudisabled;
42static spinlock_t disable_lock;
43static cycles_t congested_cycles;
44
45/* tunables: */
46static int max_concurr = MAX_BAU_CONCURRENT;
47static int max_concurr_const = MAX_BAU_CONCURRENT;
48static int plugged_delay = PLUGGED_DELAY;
49static int plugsb4reset = PLUGSB4RESET;
50static int timeoutsb4reset = TIMEOUTSB4RESET;
51static int ipi_reset_limit = IPI_RESET_LIMIT;
52static int complete_threshold = COMPLETE_THRESHOLD;
53static int congested_respns_us = CONGESTED_RESPONSE_US;
54static int congested_reps = CONGESTED_REPS;
55static int congested_period = CONGESTED_PERIOD;
56
57static struct tunables tunables[] = {
58 {&max_concurr, MAX_BAU_CONCURRENT}, /* must be [0] */
59 {&plugged_delay, PLUGGED_DELAY},
60 {&plugsb4reset, PLUGSB4RESET},
61 {&timeoutsb4reset, TIMEOUTSB4RESET},
62 {&ipi_reset_limit, IPI_RESET_LIMIT},
63 {&complete_threshold, COMPLETE_THRESHOLD},
64 {&congested_respns_us, CONGESTED_RESPONSE_US},
65 {&congested_reps, CONGESTED_REPS},
66 {&congested_period, CONGESTED_PERIOD}
67};
68
69static struct dentry *tunables_dir;
70static struct dentry *tunables_file;
71
72/* these correspond to the statistics printed by ptc_seq_show() */
73static char *stat_description[] = {
74 "sent: number of shootdown messages sent",
75 "stime: time spent sending messages",
76 "numuvhubs: number of hubs targeted with shootdown",
77 "numuvhubs16: number times 16 or more hubs targeted",
78 "numuvhubs8: number times 8 or more hubs targeted",
79 "numuvhubs4: number times 4 or more hubs targeted",
80 "numuvhubs2: number times 2 or more hubs targeted",
81 "numuvhubs1: number times 1 hub targeted",
82 "numcpus: number of cpus targeted with shootdown",
83 "dto: number of destination timeouts",
84 "retries: destination timeout retries sent",
85 "rok: : destination timeouts successfully retried",
86 "resetp: ipi-style resource resets for plugs",
87 "resett: ipi-style resource resets for timeouts",
88 "giveup: fall-backs to ipi-style shootdowns",
89 "sto: number of source timeouts",
90 "bz: number of stay-busy's",
91 "throt: number times spun in throttle",
92 "swack: image of UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE",
93 "recv: shootdown messages received",
94 "rtime: time spent processing messages",
95 "all: shootdown all-tlb messages",
96 "one: shootdown one-tlb messages",
97 "mult: interrupts that found multiple messages",
98 "none: interrupts that found no messages",
99 "retry: number of retry messages processed",
100 "canc: number messages canceled by retries",
101 "nocan: number retries that found nothing to cancel",
102 "reset: number of ipi-style reset requests processed",
103 "rcan: number messages canceled by reset requests",
104 "disable: number times use of the BAU was disabled",
105 "enable: number times use of the BAU was re-enabled"
106};
107
108static int __init
109setup_nobau(char *arg)
110{
111 nobau = 1;
112 return 0;
113}
114early_param("nobau", setup_nobau);
115
116/* base pnode in this partition */
117static int uv_base_pnode __read_mostly;
118/* position of pnode (which is nasid>>1): */
119static int uv_nshift __read_mostly;
120static unsigned long uv_mmask __read_mostly;
121
122static DEFINE_PER_CPU(struct ptc_stats, ptcstats);
123static DEFINE_PER_CPU(struct bau_control, bau_control);
124static DEFINE_PER_CPU(cpumask_var_t, uv_flush_tlb_mask);
125
126/*
127 * Determine the first node on a uvhub. 'Nodes' are used for kernel
128 * memory allocation.
129 */
130static int __init uvhub_to_first_node(int uvhub)
131{
132 int node, b;
133
134 for_each_online_node(node) {
135 b = uv_node_to_blade_id(node);
136 if (uvhub == b)
137 return node;
138 }
139 return -1;
140}
141
142/*
143 * Determine the apicid of the first cpu on a uvhub.
144 */
145static int __init uvhub_to_first_apicid(int uvhub)
146{
147 int cpu;
148
149 for_each_present_cpu(cpu)
150 if (uvhub == uv_cpu_to_blade_id(cpu))
151 return per_cpu(x86_cpu_to_apicid, cpu);
152 return -1;
153}
154
155/*
156 * Free a software acknowledge hardware resource by clearing its Pending
157 * bit. This will return a reply to the sender.
158 * If the message has timed out, a reply has already been sent by the
159 * hardware but the resource has not been released. In that case our
160 * clear of the Timeout bit (as well) will free the resource. No reply will
161 * be sent (the hardware will only do one reply per message).
162 */
163static void reply_to_message(struct msg_desc *mdp, struct bau_control *bcp)
164{
165 unsigned long dw;
166 struct bau_pq_entry *msg;
167
168 msg = mdp->msg;
169 if (!msg->canceled) {
170 dw = (msg->swack_vec << UV_SW_ACK_NPENDING) | msg->swack_vec;
171 write_mmr_sw_ack(dw);
172 }
173 msg->replied_to = 1;
174 msg->swack_vec = 0;
175}
176
177/*
178 * Process the receipt of a RETRY message
179 */
180static void bau_process_retry_msg(struct msg_desc *mdp,
181 struct bau_control *bcp)
182{
183 int i;
184 int cancel_count = 0;
185 unsigned long msg_res;
186 unsigned long mmr = 0;
187 struct bau_pq_entry *msg = mdp->msg;
188 struct bau_pq_entry *msg2;
189 struct ptc_stats *stat = bcp->statp;
190
191 stat->d_retries++;
192 /*
193 * cancel any message from msg+1 to the retry itself
194 */
195 for (msg2 = msg+1, i = 0; i < DEST_Q_SIZE; msg2++, i++) {
196 if (msg2 > mdp->queue_last)
197 msg2 = mdp->queue_first;
198 if (msg2 == msg)
199 break;
200
201 /* same conditions for cancellation as do_reset */
202 if ((msg2->replied_to == 0) && (msg2->canceled == 0) &&
203 (msg2->swack_vec) && ((msg2->swack_vec &
204 msg->swack_vec) == 0) &&
205 (msg2->sending_cpu == msg->sending_cpu) &&
206 (msg2->msg_type != MSG_NOOP)) {
207 mmr = read_mmr_sw_ack();
208 msg_res = msg2->swack_vec;
209 /*
210 * This is a message retry; clear the resources held
211 * by the previous message only if they timed out.
212 * If it has not timed out we have an unexpected
213 * situation to report.
214 */
215 if (mmr & (msg_res << UV_SW_ACK_NPENDING)) {
216 unsigned long mr;
217 /*
218 * is the resource timed out?
219 * make everyone ignore the cancelled message.
220 */
221 msg2->canceled = 1;
222 stat->d_canceled++;
223 cancel_count++;
224 mr = (msg_res << UV_SW_ACK_NPENDING) | msg_res;
225 write_mmr_sw_ack(mr);
226 }
227 }
228 }
229 if (!cancel_count)
230 stat->d_nocanceled++;
231}
232
233/*
234 * Do all the things a cpu should do for a TLB shootdown message.
235 * Other cpu's may come here at the same time for this message.
236 */
237static void bau_process_message(struct msg_desc *mdp,
238 struct bau_control *bcp)
239{
240 short socket_ack_count = 0;
241 short *sp;
242 struct atomic_short *asp;
243 struct ptc_stats *stat = bcp->statp;
244 struct bau_pq_entry *msg = mdp->msg;
245 struct bau_control *smaster = bcp->socket_master;
246
247 /*
248 * This must be a normal message, or retry of a normal message
249 */
250 if (msg->address == TLB_FLUSH_ALL) {
251 local_flush_tlb();
252 stat->d_alltlb++;
253 } else {
254 __flush_tlb_one(msg->address);
255 stat->d_onetlb++;
256 }
257 stat->d_requestee++;
258
259 /*
260 * One cpu on each uvhub has the additional job on a RETRY
261 * of releasing the resource held by the message that is
262 * being retried. That message is identified by sending
263 * cpu number.
264 */
265 if (msg->msg_type == MSG_RETRY && bcp == bcp->uvhub_master)
266 bau_process_retry_msg(mdp, bcp);
267
268 /*
269 * This is a swack message, so we have to reply to it.
270 * Count each responding cpu on the socket. This avoids
271 * pinging the count's cache line back and forth between
272 * the sockets.
273 */
274 sp = &smaster->socket_acknowledge_count[mdp->msg_slot];
275 asp = (struct atomic_short *)sp;
276 socket_ack_count = atom_asr(1, asp);
277 if (socket_ack_count == bcp->cpus_in_socket) {
278 int msg_ack_count;
279 /*
280 * Both sockets dump their completed count total into
281 * the message's count.
282 */
283 smaster->socket_acknowledge_count[mdp->msg_slot] = 0;
284 asp = (struct atomic_short *)&msg->acknowledge_count;
285 msg_ack_count = atom_asr(socket_ack_count, asp);
286
287 if (msg_ack_count == bcp->cpus_in_uvhub) {
288 /*
289 * All cpus in uvhub saw it; reply
290 */
291 reply_to_message(mdp, bcp);
292 }
293 }
294
295 return;
296}
297
298/*
299 * Determine the first cpu on a uvhub.
300 */
301static int uvhub_to_first_cpu(int uvhub)
302{
303 int cpu;
304 for_each_present_cpu(cpu)
305 if (uvhub == uv_cpu_to_blade_id(cpu))
306 return cpu;
307 return -1;
308}
309
310/*
311 * Last resort when we get a large number of destination timeouts is
312 * to clear resources held by a given cpu.
313 * Do this with IPI so that all messages in the BAU message queue
314 * can be identified by their nonzero swack_vec field.
315 *
316 * This is entered for a single cpu on the uvhub.
317 * The sender want's this uvhub to free a specific message's
318 * swack resources.
319 */
320static void do_reset(void *ptr)
321{
322 int i;
323 struct bau_control *bcp = &per_cpu(bau_control, smp_processor_id());
324 struct reset_args *rap = (struct reset_args *)ptr;
325 struct bau_pq_entry *msg;
326 struct ptc_stats *stat = bcp->statp;
327
328 stat->d_resets++;
329 /*
330 * We're looking for the given sender, and
331 * will free its swack resource.
332 * If all cpu's finally responded after the timeout, its
333 * message 'replied_to' was set.
334 */
335 for (msg = bcp->queue_first, i = 0; i < DEST_Q_SIZE; msg++, i++) {
336 unsigned long msg_res;
337 /* do_reset: same conditions for cancellation as
338 bau_process_retry_msg() */
339 if ((msg->replied_to == 0) &&
340 (msg->canceled == 0) &&
341 (msg->sending_cpu == rap->sender) &&
342 (msg->swack_vec) &&
343 (msg->msg_type != MSG_NOOP)) {
344 unsigned long mmr;
345 unsigned long mr;
346 /*
347 * make everyone else ignore this message
348 */
349 msg->canceled = 1;
350 /*
351 * only reset the resource if it is still pending
352 */
353 mmr = read_mmr_sw_ack();
354 msg_res = msg->swack_vec;
355 mr = (msg_res << UV_SW_ACK_NPENDING) | msg_res;
356 if (mmr & msg_res) {
357 stat->d_rcanceled++;
358 write_mmr_sw_ack(mr);
359 }
360 }
361 }
362 return;
363}
364
365/*
366 * Use IPI to get all target uvhubs to release resources held by
367 * a given sending cpu number.
368 */
369static void reset_with_ipi(struct bau_targ_hubmask *distribution, int sender)
370{
371 int uvhub;
372 int maskbits;
373 cpumask_t mask;
374 struct reset_args reset_args;
375
376 reset_args.sender = sender;
377 cpus_clear(mask);
378 /* find a single cpu for each uvhub in this distribution mask */
379 maskbits = sizeof(struct bau_targ_hubmask) * BITSPERBYTE;
380 for (uvhub = 0; uvhub < maskbits; uvhub++) {
381 int cpu;
382 if (!bau_uvhub_isset(uvhub, distribution))
383 continue;
384 /* find a cpu for this uvhub */
385 cpu = uvhub_to_first_cpu(uvhub);
386 cpu_set(cpu, mask);
387 }
388
389 /* IPI all cpus; preemption is already disabled */
390 smp_call_function_many(&mask, do_reset, (void *)&reset_args, 1);
391 return;
392}
393
394static inline unsigned long cycles_2_us(unsigned long long cyc)
395{
396 unsigned long long ns;
397 unsigned long us;
398 int cpu = smp_processor_id();
399
400 ns = (cyc * per_cpu(cyc2ns, cpu)) >> CYC2NS_SCALE_FACTOR;
401 us = ns / 1000;
402 return us;
403}
404
405/*
406 * wait for all cpus on this hub to finish their sends and go quiet
407 * leaves uvhub_quiesce set so that no new broadcasts are started by
408 * bau_flush_send_and_wait()
409 */
410static inline void quiesce_local_uvhub(struct bau_control *hmaster)
411{
412 atom_asr(1, (struct atomic_short *)&hmaster->uvhub_quiesce);
413}
414
415/*
416 * mark this quiet-requestor as done
417 */
418static inline void end_uvhub_quiesce(struct bau_control *hmaster)
419{
420 atom_asr(-1, (struct atomic_short *)&hmaster->uvhub_quiesce);
421}
422
423static unsigned long uv1_read_status(unsigned long mmr_offset, int right_shift)
424{
425 unsigned long descriptor_status;
426
427 descriptor_status = uv_read_local_mmr(mmr_offset);
428 descriptor_status >>= right_shift;
429 descriptor_status &= UV_ACT_STATUS_MASK;
430 return descriptor_status;
431}
432
433/*
434 * Wait for completion of a broadcast software ack message
435 * return COMPLETE, RETRY(PLUGGED or TIMEOUT) or GIVEUP
436 */
437static int uv1_wait_completion(struct bau_desc *bau_desc,
438 unsigned long mmr_offset, int right_shift,
439 struct bau_control *bcp, long try)
440{
441 unsigned long descriptor_status;
442 cycles_t ttm;
443 struct ptc_stats *stat = bcp->statp;
444
445 descriptor_status = uv1_read_status(mmr_offset, right_shift);
446 /* spin on the status MMR, waiting for it to go idle */
447 while ((descriptor_status != DS_IDLE)) {
448 /*
449 * Our software ack messages may be blocked because
450 * there are no swack resources available. As long
451 * as none of them has timed out hardware will NACK
452 * our message and its state will stay IDLE.
453 */
454 if (descriptor_status == DS_SOURCE_TIMEOUT) {
455 stat->s_stimeout++;
456 return FLUSH_GIVEUP;
457 } else if (descriptor_status == DS_DESTINATION_TIMEOUT) {
458 stat->s_dtimeout++;
459 ttm = get_cycles();
460
461 /*
462 * Our retries may be blocked by all destination
463 * swack resources being consumed, and a timeout
464 * pending. In that case hardware returns the
465 * ERROR that looks like a destination timeout.
466 */
467 if (cycles_2_us(ttm - bcp->send_message) < timeout_us) {
468 bcp->conseccompletes = 0;
469 return FLUSH_RETRY_PLUGGED;
470 }
471
472 bcp->conseccompletes = 0;
473 return FLUSH_RETRY_TIMEOUT;
474 } else {
475 /*
476 * descriptor_status is still BUSY
477 */
478 cpu_relax();
479 }
480 descriptor_status = uv1_read_status(mmr_offset, right_shift);
481 }
482 bcp->conseccompletes++;
483 return FLUSH_COMPLETE;
484}
485
486/*
487 * UV2 has an extra bit of status in the ACTIVATION_STATUS_2 register.
488 */
489static unsigned long uv2_read_status(unsigned long offset, int rshft, int cpu)
490{
491 unsigned long descriptor_status;
492 unsigned long descriptor_status2;
493
494 descriptor_status = ((read_lmmr(offset) >> rshft) & UV_ACT_STATUS_MASK);
495 descriptor_status2 = (read_mmr_uv2_status() >> cpu) & 0x1UL;
496 descriptor_status = (descriptor_status << 1) | descriptor_status2;
497 return descriptor_status;
498}
499
500static int uv2_wait_completion(struct bau_desc *bau_desc,
501 unsigned long mmr_offset, int right_shift,
502 struct bau_control *bcp, long try)
503{
504 unsigned long descriptor_stat;
505 cycles_t ttm;
506 int cpu = bcp->uvhub_cpu;
507 struct ptc_stats *stat = bcp->statp;
508
509 descriptor_stat = uv2_read_status(mmr_offset, right_shift, cpu);
510
511 /* spin on the status MMR, waiting for it to go idle */
512 while (descriptor_stat != UV2H_DESC_IDLE) {
513 /*
514 * Our software ack messages may be blocked because
515 * there are no swack resources available. As long
516 * as none of them has timed out hardware will NACK
517 * our message and its state will stay IDLE.
518 */
519 if ((descriptor_stat == UV2H_DESC_SOURCE_TIMEOUT) ||
520 (descriptor_stat == UV2H_DESC_DEST_STRONG_NACK) ||
521 (descriptor_stat == UV2H_DESC_DEST_PUT_ERR)) {
522 stat->s_stimeout++;
523 return FLUSH_GIVEUP;
524 } else if (descriptor_stat == UV2H_DESC_DEST_TIMEOUT) {
525 stat->s_dtimeout++;
526 ttm = get_cycles();
527 /*
528 * Our retries may be blocked by all destination
529 * swack resources being consumed, and a timeout
530 * pending. In that case hardware returns the
531 * ERROR that looks like a destination timeout.
532 */
533 if (cycles_2_us(ttm - bcp->send_message) < timeout_us) {
534 bcp->conseccompletes = 0;
535 return FLUSH_RETRY_PLUGGED;
536 }
537 bcp->conseccompletes = 0;
538 return FLUSH_RETRY_TIMEOUT;
539 } else {
540 /*
541 * descriptor_stat is still BUSY
542 */
543 cpu_relax();
544 }
545 descriptor_stat = uv2_read_status(mmr_offset, right_shift, cpu);
546 }
547 bcp->conseccompletes++;
548 return FLUSH_COMPLETE;
549}
550
551/*
552 * There are 2 status registers; each and array[32] of 2 bits. Set up for
553 * which register to read and position in that register based on cpu in
554 * current hub.
555 */
556static int wait_completion(struct bau_desc *bau_desc,
557 struct bau_control *bcp, long try)
558{
559 int right_shift;
560 unsigned long mmr_offset;
561 int cpu = bcp->uvhub_cpu;
562
563 if (cpu < UV_CPUS_PER_AS) {
564 mmr_offset = UVH_LB_BAU_SB_ACTIVATION_STATUS_0;
565 right_shift = cpu * UV_ACT_STATUS_SIZE;
566 } else {
567 mmr_offset = UVH_LB_BAU_SB_ACTIVATION_STATUS_1;
568 right_shift = ((cpu - UV_CPUS_PER_AS) * UV_ACT_STATUS_SIZE);
569 }
570
571 if (is_uv1_hub())
572 return uv1_wait_completion(bau_desc, mmr_offset, right_shift,
573 bcp, try);
574 else
575 return uv2_wait_completion(bau_desc, mmr_offset, right_shift,
576 bcp, try);
577}
578
579static inline cycles_t sec_2_cycles(unsigned long sec)
580{
581 unsigned long ns;
582 cycles_t cyc;
583
584 ns = sec * 1000000000;
585 cyc = (ns << CYC2NS_SCALE_FACTOR)/(per_cpu(cyc2ns, smp_processor_id()));
586 return cyc;
587}
588
589/*
590 * Our retries are blocked by all destination sw ack resources being
591 * in use, and a timeout is pending. In that case hardware immediately
592 * returns the ERROR that looks like a destination timeout.
593 */
594static void destination_plugged(struct bau_desc *bau_desc,
595 struct bau_control *bcp,
596 struct bau_control *hmaster, struct ptc_stats *stat)
597{
598 udelay(bcp->plugged_delay);
599 bcp->plugged_tries++;
600
601 if (bcp->plugged_tries >= bcp->plugsb4reset) {
602 bcp->plugged_tries = 0;
603
604 quiesce_local_uvhub(hmaster);
605
606 spin_lock(&hmaster->queue_lock);
607 reset_with_ipi(&bau_desc->distribution, bcp->cpu);
608 spin_unlock(&hmaster->queue_lock);
609
610 end_uvhub_quiesce(hmaster);
611
612 bcp->ipi_attempts++;
613 stat->s_resets_plug++;
614 }
615}
616
617static void destination_timeout(struct bau_desc *bau_desc,
618 struct bau_control *bcp, struct bau_control *hmaster,
619 struct ptc_stats *stat)
620{
621 hmaster->max_concurr = 1;
622 bcp->timeout_tries++;
623 if (bcp->timeout_tries >= bcp->timeoutsb4reset) {
624 bcp->timeout_tries = 0;
625
626 quiesce_local_uvhub(hmaster);
627
628 spin_lock(&hmaster->queue_lock);
629 reset_with_ipi(&bau_desc->distribution, bcp->cpu);
630 spin_unlock(&hmaster->queue_lock);
631
632 end_uvhub_quiesce(hmaster);
633
634 bcp->ipi_attempts++;
635 stat->s_resets_timeout++;
636 }
637}
638
639/*
640 * Completions are taking a very long time due to a congested numalink
641 * network.
642 */
643static void disable_for_congestion(struct bau_control *bcp,
644 struct ptc_stats *stat)
645{
646 /* let only one cpu do this disabling */
647 spin_lock(&disable_lock);
648
649 if (!baudisabled && bcp->period_requests &&
650 ((bcp->period_time / bcp->period_requests) > congested_cycles)) {
651 int tcpu;
652 struct bau_control *tbcp;
653 /* it becomes this cpu's job to turn on the use of the
654 BAU again */
655 baudisabled = 1;
656 bcp->set_bau_off = 1;
657 bcp->set_bau_on_time = get_cycles();
658 bcp->set_bau_on_time += sec_2_cycles(bcp->cong_period);
659 stat->s_bau_disabled++;
660 for_each_present_cpu(tcpu) {
661 tbcp = &per_cpu(bau_control, tcpu);
662 tbcp->baudisabled = 1;
663 }
664 }
665
666 spin_unlock(&disable_lock);
667}
668
669static void count_max_concurr(int stat, struct bau_control *bcp,
670 struct bau_control *hmaster)
671{
672 bcp->plugged_tries = 0;
673 bcp->timeout_tries = 0;
674 if (stat != FLUSH_COMPLETE)
675 return;
676 if (bcp->conseccompletes <= bcp->complete_threshold)
677 return;
678 if (hmaster->max_concurr >= hmaster->max_concurr_const)
679 return;
680 hmaster->max_concurr++;
681}
682
683static void record_send_stats(cycles_t time1, cycles_t time2,
684 struct bau_control *bcp, struct ptc_stats *stat,
685 int completion_status, int try)
686{
687 cycles_t elapsed;
688
689 if (time2 > time1) {
690 elapsed = time2 - time1;
691 stat->s_time += elapsed;
692
693 if ((completion_status == FLUSH_COMPLETE) && (try == 1)) {
694 bcp->period_requests++;
695 bcp->period_time += elapsed;
696 if ((elapsed > congested_cycles) &&
697 (bcp->period_requests > bcp->cong_reps))
698 disable_for_congestion(bcp, stat);
699 }
700 } else
701 stat->s_requestor--;
702
703 if (completion_status == FLUSH_COMPLETE && try > 1)
704 stat->s_retriesok++;
705 else if (completion_status == FLUSH_GIVEUP)
706 stat->s_giveup++;
707}
708
709/*
710 * Because of a uv1 hardware bug only a limited number of concurrent
711 * requests can be made.
712 */
713static void uv1_throttle(struct bau_control *hmaster, struct ptc_stats *stat)
714{
715 spinlock_t *lock = &hmaster->uvhub_lock;
716 atomic_t *v;
717
718 v = &hmaster->active_descriptor_count;
719 if (!atomic_inc_unless_ge(lock, v, hmaster->max_concurr)) {
720 stat->s_throttles++;
721 do {
722 cpu_relax();
723 } while (!atomic_inc_unless_ge(lock, v, hmaster->max_concurr));
724 }
725}
726
727/*
728 * Handle the completion status of a message send.
729 */
730static void handle_cmplt(int completion_status, struct bau_desc *bau_desc,
731 struct bau_control *bcp, struct bau_control *hmaster,
732 struct ptc_stats *stat)
733{
734 if (completion_status == FLUSH_RETRY_PLUGGED)
735 destination_plugged(bau_desc, bcp, hmaster, stat);
736 else if (completion_status == FLUSH_RETRY_TIMEOUT)
737 destination_timeout(bau_desc, bcp, hmaster, stat);
738}
739
740/*
741 * Send a broadcast and wait for it to complete.
742 *
743 * The flush_mask contains the cpus the broadcast is to be sent to including
744 * cpus that are on the local uvhub.
745 *
746 * Returns 0 if all flushing represented in the mask was done.
747 * Returns 1 if it gives up entirely and the original cpu mask is to be
748 * returned to the kernel.
749 */
750int uv_flush_send_and_wait(struct bau_desc *bau_desc,
751 struct cpumask *flush_mask, struct bau_control *bcp)
752{
753 int seq_number = 0;
754 int completion_stat = 0;
755 long try = 0;
756 unsigned long index;
757 cycles_t time1;
758 cycles_t time2;
759 struct ptc_stats *stat = bcp->statp;
760 struct bau_control *hmaster = bcp->uvhub_master;
761
762 if (is_uv1_hub())
763 uv1_throttle(hmaster, stat);
764
765 while (hmaster->uvhub_quiesce)
766 cpu_relax();
767
768 time1 = get_cycles();
769 do {
770 if (try == 0) {
771 bau_desc->header.msg_type = MSG_REGULAR;
772 seq_number = bcp->message_number++;
773 } else {
774 bau_desc->header.msg_type = MSG_RETRY;
775 stat->s_retry_messages++;
776 }
777
778 bau_desc->header.sequence = seq_number;
779 index = (1UL << AS_PUSH_SHIFT) | bcp->uvhub_cpu;
780 bcp->send_message = get_cycles();
781
782 write_mmr_activation(index);
783
784 try++;
785 completion_stat = wait_completion(bau_desc, bcp, try);
786
787 handle_cmplt(completion_stat, bau_desc, bcp, hmaster, stat);
788
789 if (bcp->ipi_attempts >= bcp->ipi_reset_limit) {
790 bcp->ipi_attempts = 0;
791 completion_stat = FLUSH_GIVEUP;
792 break;
793 }
794 cpu_relax();
795 } while ((completion_stat == FLUSH_RETRY_PLUGGED) ||
796 (completion_stat == FLUSH_RETRY_TIMEOUT));
797
798 time2 = get_cycles();
799
800 count_max_concurr(completion_stat, bcp, hmaster);
801
802 while (hmaster->uvhub_quiesce)
803 cpu_relax();
804
805 atomic_dec(&hmaster->active_descriptor_count);
806
807 record_send_stats(time1, time2, bcp, stat, completion_stat, try);
808
809 if (completion_stat == FLUSH_GIVEUP)
810 return 1;
811 return 0;
812}
813
814/*
815 * The BAU is disabled. When the disabled time period has expired, the cpu
816 * that disabled it must re-enable it.
817 * Return 0 if it is re-enabled for all cpus.
818 */
819static int check_enable(struct bau_control *bcp, struct ptc_stats *stat)
820{
821 int tcpu;
822 struct bau_control *tbcp;
823
824 if (bcp->set_bau_off) {
825 if (get_cycles() >= bcp->set_bau_on_time) {
826 stat->s_bau_reenabled++;
827 baudisabled = 0;
828 for_each_present_cpu(tcpu) {
829 tbcp = &per_cpu(bau_control, tcpu);
830 tbcp->baudisabled = 0;
831 tbcp->period_requests = 0;
832 tbcp->period_time = 0;
833 }
834 return 0;
835 }
836 }
837 return -1;
838}
839
840static void record_send_statistics(struct ptc_stats *stat, int locals, int hubs,
841 int remotes, struct bau_desc *bau_desc)
842{
843 stat->s_requestor++;
844 stat->s_ntargcpu += remotes + locals;
845 stat->s_ntargremotes += remotes;
846 stat->s_ntarglocals += locals;
847
848 /* uvhub statistics */
849 hubs = bau_uvhub_weight(&bau_desc->distribution);
850 if (locals) {
851 stat->s_ntarglocaluvhub++;
852 stat->s_ntargremoteuvhub += (hubs - 1);
853 } else
854 stat->s_ntargremoteuvhub += hubs;
855
856 stat->s_ntarguvhub += hubs;
857
858 if (hubs >= 16)
859 stat->s_ntarguvhub16++;
860 else if (hubs >= 8)
861 stat->s_ntarguvhub8++;
862 else if (hubs >= 4)
863 stat->s_ntarguvhub4++;
864 else if (hubs >= 2)
865 stat->s_ntarguvhub2++;
866 else
867 stat->s_ntarguvhub1++;
868}
869
870/*
871 * Translate a cpu mask to the uvhub distribution mask in the BAU
872 * activation descriptor.
873 */
874static int set_distrib_bits(struct cpumask *flush_mask, struct bau_control *bcp,
875 struct bau_desc *bau_desc, int *localsp, int *remotesp)
876{
877 int cpu;
878 int pnode;
879 int cnt = 0;
880 struct hub_and_pnode *hpp;
881
882 for_each_cpu(cpu, flush_mask) {
883 /*
884 * The distribution vector is a bit map of pnodes, relative
885 * to the partition base pnode (and the partition base nasid
886 * in the header).
887 * Translate cpu to pnode and hub using a local memory array.
888 */
889 hpp = &bcp->socket_master->thp[cpu];
890 pnode = hpp->pnode - bcp->partition_base_pnode;
891 bau_uvhub_set(pnode, &bau_desc->distribution);
892 cnt++;
893 if (hpp->uvhub == bcp->uvhub)
894 (*localsp)++;
895 else
896 (*remotesp)++;
897 }
898 if (!cnt)
899 return 1;
900 return 0;
901}
902
903/*
904 * globally purge translation cache of a virtual address or all TLB's
905 * @cpumask: mask of all cpu's in which the address is to be removed
906 * @mm: mm_struct containing virtual address range
907 * @va: virtual address to be removed (or TLB_FLUSH_ALL for all TLB's on cpu)
908 * @cpu: the current cpu
909 *
910 * This is the entry point for initiating any UV global TLB shootdown.
911 *
912 * Purges the translation caches of all specified processors of the given
913 * virtual address, or purges all TLB's on specified processors.
914 *
915 * The caller has derived the cpumask from the mm_struct. This function
916 * is called only if there are bits set in the mask. (e.g. flush_tlb_page())
917 *
918 * The cpumask is converted into a uvhubmask of the uvhubs containing
919 * those cpus.
920 *
921 * Note that this function should be called with preemption disabled.
922 *
923 * Returns NULL if all remote flushing was done.
924 * Returns pointer to cpumask if some remote flushing remains to be
925 * done. The returned pointer is valid till preemption is re-enabled.
926 */
927const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask,
928 struct mm_struct *mm, unsigned long va,
929 unsigned int cpu)
930{
931 int locals = 0;
932 int remotes = 0;
933 int hubs = 0;
934 struct bau_desc *bau_desc;
935 struct cpumask *flush_mask;
936 struct ptc_stats *stat;
937 struct bau_control *bcp;
938
939 /* kernel was booted 'nobau' */
940 if (nobau)
941 return cpumask;
942
943 bcp = &per_cpu(bau_control, cpu);
944 stat = bcp->statp;
945
946 /* bau was disabled due to slow response */
947 if (bcp->baudisabled) {
948 if (check_enable(bcp, stat))
949 return cpumask;
950 }
951
952 /*
953 * Each sending cpu has a per-cpu mask which it fills from the caller's
954 * cpu mask. All cpus are converted to uvhubs and copied to the
955 * activation descriptor.
956 */
957 flush_mask = (struct cpumask *)per_cpu(uv_flush_tlb_mask, cpu);
958 /* don't actually do a shootdown of the local cpu */
959 cpumask_andnot(flush_mask, cpumask, cpumask_of(cpu));
960
961 if (cpu_isset(cpu, *cpumask))
962 stat->s_ntargself++;
963
964 bau_desc = bcp->descriptor_base;
965 bau_desc += ITEMS_PER_DESC * bcp->uvhub_cpu;
966 bau_uvhubs_clear(&bau_desc->distribution, UV_DISTRIBUTION_SIZE);
967 if (set_distrib_bits(flush_mask, bcp, bau_desc, &locals, &remotes))
968 return NULL;
969
970 record_send_statistics(stat, locals, hubs, remotes, bau_desc);
971
972 bau_desc->payload.address = va;
973 bau_desc->payload.sending_cpu = cpu;
974 /*
975 * uv_flush_send_and_wait returns 0 if all cpu's were messaged,
976 * or 1 if it gave up and the original cpumask should be returned.
977 */
978 if (!uv_flush_send_and_wait(bau_desc, flush_mask, bcp))
979 return NULL;
980 else
981 return cpumask;
982}
983
984/*
985 * The BAU message interrupt comes here. (registered by set_intr_gate)
986 * See entry_64.S
987 *
988 * We received a broadcast assist message.
989 *
990 * Interrupts are disabled; this interrupt could represent
991 * the receipt of several messages.
992 *
993 * All cores/threads on this hub get this interrupt.
994 * The last one to see it does the software ack.
995 * (the resource will not be freed until noninterruptable cpus see this
996 * interrupt; hardware may timeout the s/w ack and reply ERROR)
997 */
998void uv_bau_message_interrupt(struct pt_regs *regs)
999{
1000 int count = 0;
1001 cycles_t time_start;
1002 struct bau_pq_entry *msg;
1003 struct bau_control *bcp;
1004 struct ptc_stats *stat;
1005 struct msg_desc msgdesc;
1006
1007 time_start = get_cycles();
1008
1009 bcp = &per_cpu(bau_control, smp_processor_id());
1010 stat = bcp->statp;
1011
1012 msgdesc.queue_first = bcp->queue_first;
1013 msgdesc.queue_last = bcp->queue_last;
1014
1015 msg = bcp->bau_msg_head;
1016 while (msg->swack_vec) {
1017 count++;
1018
1019 msgdesc.msg_slot = msg - msgdesc.queue_first;
1020 msgdesc.swack_slot = ffs(msg->swack_vec) - 1;
1021 msgdesc.msg = msg;
1022 bau_process_message(&msgdesc, bcp);
1023
1024 msg++;
1025 if (msg > msgdesc.queue_last)
1026 msg = msgdesc.queue_first;
1027 bcp->bau_msg_head = msg;
1028 }
1029 stat->d_time += (get_cycles() - time_start);
1030 if (!count)
1031 stat->d_nomsg++;
1032 else if (count > 1)
1033 stat->d_multmsg++;
1034
1035 ack_APIC_irq();
1036}
1037
1038/*
1039 * Each target uvhub (i.e. a uvhub that has cpu's) needs to have
1040 * shootdown message timeouts enabled. The timeout does not cause
1041 * an interrupt, but causes an error message to be returned to
1042 * the sender.
1043 */
1044static void __init enable_timeouts(void)
1045{
1046 int uvhub;
1047 int nuvhubs;
1048 int pnode;
1049 unsigned long mmr_image;
1050
1051 nuvhubs = uv_num_possible_blades();
1052
1053 for (uvhub = 0; uvhub < nuvhubs; uvhub++) {
1054 if (!uv_blade_nr_possible_cpus(uvhub))
1055 continue;
1056
1057 pnode = uv_blade_to_pnode(uvhub);
1058 mmr_image = read_mmr_misc_control(pnode);
1059 /*
1060 * Set the timeout period and then lock it in, in three
1061 * steps; captures and locks in the period.
1062 *
1063 * To program the period, the SOFT_ACK_MODE must be off.
1064 */
1065 mmr_image &= ~(1L << SOFTACK_MSHIFT);
1066 write_mmr_misc_control(pnode, mmr_image);
1067 /*
1068 * Set the 4-bit period.
1069 */
1070 mmr_image &= ~((unsigned long)0xf << SOFTACK_PSHIFT);
1071 mmr_image |= (SOFTACK_TIMEOUT_PERIOD << SOFTACK_PSHIFT);
1072 write_mmr_misc_control(pnode, mmr_image);
1073 /*
1074 * UV1:
1075 * Subsequent reversals of the timebase bit (3) cause an
1076 * immediate timeout of one or all INTD resources as
1077 * indicated in bits 2:0 (7 causes all of them to timeout).
1078 */
1079 mmr_image |= (1L << SOFTACK_MSHIFT);
1080 if (is_uv2_hub()) {
1081 mmr_image |= (1L << UV2_LEG_SHFT);
1082 mmr_image |= (1L << UV2_EXT_SHFT);
1083 }
1084 write_mmr_misc_control(pnode, mmr_image);
1085 }
1086}
1087
1088static void *ptc_seq_start(struct seq_file *file, loff_t *offset)
1089{
1090 if (*offset < num_possible_cpus())
1091 return offset;
1092 return NULL;
1093}
1094
1095static void *ptc_seq_next(struct seq_file *file, void *data, loff_t *offset)
1096{
1097 (*offset)++;
1098 if (*offset < num_possible_cpus())
1099 return offset;
1100 return NULL;
1101}
1102
1103static void ptc_seq_stop(struct seq_file *file, void *data)
1104{
1105}
1106
1107static inline unsigned long long usec_2_cycles(unsigned long microsec)
1108{
1109 unsigned long ns;
1110 unsigned long long cyc;
1111
1112 ns = microsec * 1000;
1113 cyc = (ns << CYC2NS_SCALE_FACTOR)/(per_cpu(cyc2ns, smp_processor_id()));
1114 return cyc;
1115}
1116
1117/*
1118 * Display the statistics thru /proc/sgi_uv/ptc_statistics
1119 * 'data' points to the cpu number
1120 * Note: see the descriptions in stat_description[].
1121 */
1122static int ptc_seq_show(struct seq_file *file, void *data)
1123{
1124 struct ptc_stats *stat;
1125 int cpu;
1126
1127 cpu = *(loff_t *)data;
1128 if (!cpu) {
1129 seq_printf(file,
1130 "# cpu sent stime self locals remotes ncpus localhub ");
1131 seq_printf(file,
1132 "remotehub numuvhubs numuvhubs16 numuvhubs8 ");
1133 seq_printf(file,
1134 "numuvhubs4 numuvhubs2 numuvhubs1 dto retries rok ");
1135 seq_printf(file,
1136 "resetp resett giveup sto bz throt swack recv rtime ");
1137 seq_printf(file,
1138 "all one mult none retry canc nocan reset rcan ");
1139 seq_printf(file,
1140 "disable enable\n");
1141 }
1142 if (cpu < num_possible_cpus() && cpu_online(cpu)) {
1143 stat = &per_cpu(ptcstats, cpu);
1144 /* source side statistics */
1145 seq_printf(file,
1146 "cpu %d %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld ",
1147 cpu, stat->s_requestor, cycles_2_us(stat->s_time),
1148 stat->s_ntargself, stat->s_ntarglocals,
1149 stat->s_ntargremotes, stat->s_ntargcpu,
1150 stat->s_ntarglocaluvhub, stat->s_ntargremoteuvhub,
1151 stat->s_ntarguvhub, stat->s_ntarguvhub16);
1152 seq_printf(file, "%ld %ld %ld %ld %ld ",
1153 stat->s_ntarguvhub8, stat->s_ntarguvhub4,
1154 stat->s_ntarguvhub2, stat->s_ntarguvhub1,
1155 stat->s_dtimeout);
1156 seq_printf(file, "%ld %ld %ld %ld %ld %ld %ld %ld ",
1157 stat->s_retry_messages, stat->s_retriesok,
1158 stat->s_resets_plug, stat->s_resets_timeout,
1159 stat->s_giveup, stat->s_stimeout,
1160 stat->s_busy, stat->s_throttles);
1161
1162 /* destination side statistics */
1163 seq_printf(file,
1164 "%lx %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld ",
1165 read_gmmr_sw_ack(uv_cpu_to_pnode(cpu)),
1166 stat->d_requestee, cycles_2_us(stat->d_time),
1167 stat->d_alltlb, stat->d_onetlb, stat->d_multmsg,
1168 stat->d_nomsg, stat->d_retries, stat->d_canceled,
1169 stat->d_nocanceled, stat->d_resets,
1170 stat->d_rcanceled);
1171 seq_printf(file, "%ld %ld\n",
1172 stat->s_bau_disabled, stat->s_bau_reenabled);
1173 }
1174 return 0;
1175}
1176
1177/*
1178 * Display the tunables thru debugfs
1179 */
1180static ssize_t tunables_read(struct file *file, char __user *userbuf,
1181 size_t count, loff_t *ppos)
1182{
1183 char *buf;
1184 int ret;
1185
1186 buf = kasprintf(GFP_KERNEL, "%s %s %s\n%d %d %d %d %d %d %d %d %d\n",
1187 "max_concur plugged_delay plugsb4reset",
1188 "timeoutsb4reset ipi_reset_limit complete_threshold",
1189 "congested_response_us congested_reps congested_period",
1190 max_concurr, plugged_delay, plugsb4reset,
1191 timeoutsb4reset, ipi_reset_limit, complete_threshold,
1192 congested_respns_us, congested_reps, congested_period);
1193
1194 if (!buf)
1195 return -ENOMEM;
1196
1197 ret = simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
1198 kfree(buf);
1199 return ret;
1200}
1201
1202/*
1203 * handle a write to /proc/sgi_uv/ptc_statistics
1204 * -1: reset the statistics
1205 * 0: display meaning of the statistics
1206 */
1207static ssize_t ptc_proc_write(struct file *file, const char __user *user,
1208 size_t count, loff_t *data)
1209{
1210 int cpu;
1211 int i;
1212 int elements;
1213 long input_arg;
1214 char optstr[64];
1215 struct ptc_stats *stat;
1216
1217 if (count == 0 || count > sizeof(optstr))
1218 return -EINVAL;
1219 if (copy_from_user(optstr, user, count))
1220 return -EFAULT;
1221 optstr[count - 1] = '\0';
1222
1223 if (strict_strtol(optstr, 10, &input_arg) < 0) {
1224 printk(KERN_DEBUG "%s is invalid\n", optstr);
1225 return -EINVAL;
1226 }
1227
1228 if (input_arg == 0) {
1229 elements = sizeof(stat_description)/sizeof(*stat_description);
1230 printk(KERN_DEBUG "# cpu: cpu number\n");
1231 printk(KERN_DEBUG "Sender statistics:\n");
1232 for (i = 0; i < elements; i++)
1233 printk(KERN_DEBUG "%s\n", stat_description[i]);
1234 } else if (input_arg == -1) {
1235 for_each_present_cpu(cpu) {
1236 stat = &per_cpu(ptcstats, cpu);
1237 memset(stat, 0, sizeof(struct ptc_stats));
1238 }
1239 }
1240
1241 return count;
1242}
1243
1244static int local_atoi(const char *name)
1245{
1246 int val = 0;
1247
1248 for (;; name++) {
1249 switch (*name) {
1250 case '0' ... '9':
1251 val = 10*val+(*name-'0');
1252 break;
1253 default:
1254 return val;
1255 }
1256 }
1257}
1258
1259/*
1260 * Parse the values written to /sys/kernel/debug/sgi_uv/bau_tunables.
1261 * Zero values reset them to defaults.
1262 */
1263static int parse_tunables_write(struct bau_control *bcp, char *instr,
1264 int count)
1265{
1266 char *p;
1267 char *q;
1268 int cnt = 0;
1269 int val;
1270 int e = sizeof(tunables) / sizeof(*tunables);
1271
1272 p = instr + strspn(instr, WHITESPACE);
1273 q = p;
1274 for (; *p; p = q + strspn(q, WHITESPACE)) {
1275 q = p + strcspn(p, WHITESPACE);
1276 cnt++;
1277 if (q == p)
1278 break;
1279 }
1280 if (cnt != e) {
1281 printk(KERN_INFO "bau tunable error: should be %d values\n", e);
1282 return -EINVAL;
1283 }
1284
1285 p = instr + strspn(instr, WHITESPACE);
1286 q = p;
1287 for (cnt = 0; *p; p = q + strspn(q, WHITESPACE), cnt++) {
1288 q = p + strcspn(p, WHITESPACE);
1289 val = local_atoi(p);
1290 switch (cnt) {
1291 case 0:
1292 if (val == 0) {
1293 max_concurr = MAX_BAU_CONCURRENT;
1294 max_concurr_const = MAX_BAU_CONCURRENT;
1295 continue;
1296 }
1297 if (val < 1 || val > bcp->cpus_in_uvhub) {
1298 printk(KERN_DEBUG
1299 "Error: BAU max concurrent %d is invalid\n",
1300 val);
1301 return -EINVAL;
1302 }
1303 max_concurr = val;
1304 max_concurr_const = val;
1305 continue;
1306 default:
1307 if (val == 0)
1308 *tunables[cnt].tunp = tunables[cnt].deflt;
1309 else
1310 *tunables[cnt].tunp = val;
1311 continue;
1312 }
1313 if (q == p)
1314 break;
1315 }
1316 return 0;
1317}
1318
1319/*
1320 * Handle a write to debugfs. (/sys/kernel/debug/sgi_uv/bau_tunables)
1321 */
1322static ssize_t tunables_write(struct file *file, const char __user *user,
1323 size_t count, loff_t *data)
1324{
1325 int cpu;
1326 int ret;
1327 char instr[100];
1328 struct bau_control *bcp;
1329
1330 if (count == 0 || count > sizeof(instr)-1)
1331 return -EINVAL;
1332 if (copy_from_user(instr, user, count))
1333 return -EFAULT;
1334
1335 instr[count] = '\0';
1336
1337 bcp = &per_cpu(bau_control, smp_processor_id());
1338
1339 ret = parse_tunables_write(bcp, instr, count);
1340 if (ret)
1341 return ret;
1342
1343 for_each_present_cpu(cpu) {
1344 bcp = &per_cpu(bau_control, cpu);
1345 bcp->max_concurr = max_concurr;
1346 bcp->max_concurr_const = max_concurr;
1347 bcp->plugged_delay = plugged_delay;
1348 bcp->plugsb4reset = plugsb4reset;
1349 bcp->timeoutsb4reset = timeoutsb4reset;
1350 bcp->ipi_reset_limit = ipi_reset_limit;
1351 bcp->complete_threshold = complete_threshold;
1352 bcp->cong_response_us = congested_respns_us;
1353 bcp->cong_reps = congested_reps;
1354 bcp->cong_period = congested_period;
1355 }
1356 return count;
1357}
1358
1359static const struct seq_operations uv_ptc_seq_ops = {
1360 .start = ptc_seq_start,
1361 .next = ptc_seq_next,
1362 .stop = ptc_seq_stop,
1363 .show = ptc_seq_show
1364};
1365
1366static int ptc_proc_open(struct inode *inode, struct file *file)
1367{
1368 return seq_open(file, &uv_ptc_seq_ops);
1369}
1370
1371static int tunables_open(struct inode *inode, struct file *file)
1372{
1373 return 0;
1374}
1375
1376static const struct file_operations proc_uv_ptc_operations = {
1377 .open = ptc_proc_open,
1378 .read = seq_read,
1379 .write = ptc_proc_write,
1380 .llseek = seq_lseek,
1381 .release = seq_release,
1382};
1383
1384static const struct file_operations tunables_fops = {
1385 .open = tunables_open,
1386 .read = tunables_read,
1387 .write = tunables_write,
1388 .llseek = default_llseek,
1389};
1390
1391static int __init uv_ptc_init(void)
1392{
1393 struct proc_dir_entry *proc_uv_ptc;
1394
1395 if (!is_uv_system())
1396 return 0;
1397
1398 proc_uv_ptc = proc_create(UV_PTC_BASENAME, 0444, NULL,
1399 &proc_uv_ptc_operations);
1400 if (!proc_uv_ptc) {
1401 printk(KERN_ERR "unable to create %s proc entry\n",
1402 UV_PTC_BASENAME);
1403 return -EINVAL;
1404 }
1405
1406 tunables_dir = debugfs_create_dir(UV_BAU_TUNABLES_DIR, NULL);
1407 if (!tunables_dir) {
1408 printk(KERN_ERR "unable to create debugfs directory %s\n",
1409 UV_BAU_TUNABLES_DIR);
1410 return -EINVAL;
1411 }
1412 tunables_file = debugfs_create_file(UV_BAU_TUNABLES_FILE, 0600,
1413 tunables_dir, NULL, &tunables_fops);
1414 if (!tunables_file) {
1415 printk(KERN_ERR "unable to create debugfs file %s\n",
1416 UV_BAU_TUNABLES_FILE);
1417 return -EINVAL;
1418 }
1419 return 0;
1420}
1421
1422/*
1423 * Initialize the sending side's sending buffers.
1424 */
1425static void activation_descriptor_init(int node, int pnode, int base_pnode)
1426{
1427 int i;
1428 int cpu;
1429 unsigned long pa;
1430 unsigned long m;
1431 unsigned long n;
1432 size_t dsize;
1433 struct bau_desc *bau_desc;
1434 struct bau_desc *bd2;
1435 struct bau_control *bcp;
1436
1437 /*
1438 * each bau_desc is 64 bytes; there are 8 (ITEMS_PER_DESC)
1439 * per cpu; and one per cpu on the uvhub (ADP_SZ)
1440 */
1441 dsize = sizeof(struct bau_desc) * ADP_SZ * ITEMS_PER_DESC;
1442 bau_desc = kmalloc_node(dsize, GFP_KERNEL, node);
1443 BUG_ON(!bau_desc);
1444
1445 pa = uv_gpa(bau_desc); /* need the real nasid*/
1446 n = pa >> uv_nshift;
1447 m = pa & uv_mmask;
1448
1449 /* the 14-bit pnode */
1450 write_mmr_descriptor_base(pnode, (n << UV_DESC_PSHIFT | m));
1451 /*
1452 * Initializing all 8 (ITEMS_PER_DESC) descriptors for each
1453 * cpu even though we only use the first one; one descriptor can
1454 * describe a broadcast to 256 uv hubs.
1455 */
1456 for (i = 0, bd2 = bau_desc; i < (ADP_SZ * ITEMS_PER_DESC); i++, bd2++) {
1457 memset(bd2, 0, sizeof(struct bau_desc));
1458 bd2->header.swack_flag = 1;
1459 /*
1460 * The base_dest_nasid set in the message header is the nasid
1461 * of the first uvhub in the partition. The bit map will
1462 * indicate destination pnode numbers relative to that base.
1463 * They may not be consecutive if nasid striding is being used.
1464 */
1465 bd2->header.base_dest_nasid = UV_PNODE_TO_NASID(base_pnode);
1466 bd2->header.dest_subnodeid = UV_LB_SUBNODEID;
1467 bd2->header.command = UV_NET_ENDPOINT_INTD;
1468 bd2->header.int_both = 1;
1469 /*
1470 * all others need to be set to zero:
1471 * fairness chaining multilevel count replied_to
1472 */
1473 }
1474 for_each_present_cpu(cpu) {
1475 if (pnode != uv_blade_to_pnode(uv_cpu_to_blade_id(cpu)))
1476 continue;
1477 bcp = &per_cpu(bau_control, cpu);
1478 bcp->descriptor_base = bau_desc;
1479 }
1480}
1481
1482/*
1483 * initialize the destination side's receiving buffers
1484 * entered for each uvhub in the partition
1485 * - node is first node (kernel memory notion) on the uvhub
1486 * - pnode is the uvhub's physical identifier
1487 */
1488static void pq_init(int node, int pnode)
1489{
1490 int cpu;
1491 size_t plsize;
1492 char *cp;
1493 void *vp;
1494 unsigned long pn;
1495 unsigned long first;
1496 unsigned long pn_first;
1497 unsigned long last;
1498 struct bau_pq_entry *pqp;
1499 struct bau_control *bcp;
1500
1501 plsize = (DEST_Q_SIZE + 1) * sizeof(struct bau_pq_entry);
1502 vp = kmalloc_node(plsize, GFP_KERNEL, node);
1503 pqp = (struct bau_pq_entry *)vp;
1504 BUG_ON(!pqp);
1505
1506 cp = (char *)pqp + 31;
1507 pqp = (struct bau_pq_entry *)(((unsigned long)cp >> 5) << 5);
1508
1509 for_each_present_cpu(cpu) {
1510 if (pnode != uv_cpu_to_pnode(cpu))
1511 continue;
1512 /* for every cpu on this pnode: */
1513 bcp = &per_cpu(bau_control, cpu);
1514 bcp->queue_first = pqp;
1515 bcp->bau_msg_head = pqp;
1516 bcp->queue_last = pqp + (DEST_Q_SIZE - 1);
1517 }
1518 /*
1519 * need the pnode of where the memory was really allocated
1520 */
1521 pn = uv_gpa(pqp) >> uv_nshift;
1522 first = uv_physnodeaddr(pqp);
1523 pn_first = ((unsigned long)pn << UV_PAYLOADQ_PNODE_SHIFT) | first;
1524 last = uv_physnodeaddr(pqp + (DEST_Q_SIZE - 1));
1525 write_mmr_payload_first(pnode, pn_first);
1526 write_mmr_payload_tail(pnode, first);
1527 write_mmr_payload_last(pnode, last);
1528
1529 /* in effect, all msg_type's are set to MSG_NOOP */
1530 memset(pqp, 0, sizeof(struct bau_pq_entry) * DEST_Q_SIZE);
1531}
1532
1533/*
1534 * Initialization of each UV hub's structures
1535 */
1536static void __init init_uvhub(int uvhub, int vector, int base_pnode)
1537{
1538 int node;
1539 int pnode;
1540 unsigned long apicid;
1541
1542 node = uvhub_to_first_node(uvhub);
1543 pnode = uv_blade_to_pnode(uvhub);
1544
1545 activation_descriptor_init(node, pnode, base_pnode);
1546
1547 pq_init(node, pnode);
1548 /*
1549 * The below initialization can't be in firmware because the
1550 * messaging IRQ will be determined by the OS.
1551 */
1552 apicid = uvhub_to_first_apicid(uvhub) | uv_apicid_hibits;
1553 write_mmr_data_config(pnode, ((apicid << 32) | vector));
1554}
1555
1556/*
1557 * We will set BAU_MISC_CONTROL with a timeout period.
1558 * But the BIOS has set UVH_AGING_PRESCALE_SEL and UVH_TRANSACTION_TIMEOUT.
1559 * So the destination timeout period has to be calculated from them.
1560 */
1561static int calculate_destination_timeout(void)
1562{
1563 unsigned long mmr_image;
1564 int mult1;
1565 int mult2;
1566 int index;
1567 int base;
1568 int ret;
1569 unsigned long ts_ns;
1570
1571 if (is_uv1_hub()) {
1572 mult1 = SOFTACK_TIMEOUT_PERIOD & BAU_MISC_CONTROL_MULT_MASK;
1573 mmr_image = uv_read_local_mmr(UVH_AGING_PRESCALE_SEL);
1574 index = (mmr_image >> BAU_URGENCY_7_SHIFT) & BAU_URGENCY_7_MASK;
1575 mmr_image = uv_read_local_mmr(UVH_TRANSACTION_TIMEOUT);
1576 mult2 = (mmr_image >> BAU_TRANS_SHIFT) & BAU_TRANS_MASK;
1577 base = timeout_base_ns[index];
1578 ts_ns = base * mult1 * mult2;
1579 ret = ts_ns / 1000;
1580 } else {
1581 /* 4 bits 0/1 for 10/80us, 3 bits of multiplier */
1582 mmr_image = uv_read_local_mmr(UVH_AGING_PRESCALE_SEL);
1583 mmr_image = (mmr_image & UV_SA_MASK) >> UV_SA_SHFT;
1584 if (mmr_image & (1L << UV2_ACK_UNITS_SHFT))
1585 mult1 = 80;
1586 else
1587 mult1 = 10;
1588 base = mmr_image & UV2_ACK_MASK;
1589 ret = mult1 * base;
1590 }
1591 return ret;
1592}
1593
1594static void __init init_per_cpu_tunables(void)
1595{
1596 int cpu;
1597 struct bau_control *bcp;
1598
1599 for_each_present_cpu(cpu) {
1600 bcp = &per_cpu(bau_control, cpu);
1601 bcp->baudisabled = 0;
1602 bcp->statp = &per_cpu(ptcstats, cpu);
1603 /* time interval to catch a hardware stay-busy bug */
1604 bcp->timeout_interval = usec_2_cycles(2*timeout_us);
1605 bcp->max_concurr = max_concurr;
1606 bcp->max_concurr_const = max_concurr;
1607 bcp->plugged_delay = plugged_delay;
1608 bcp->plugsb4reset = plugsb4reset;
1609 bcp->timeoutsb4reset = timeoutsb4reset;
1610 bcp->ipi_reset_limit = ipi_reset_limit;
1611 bcp->complete_threshold = complete_threshold;
1612 bcp->cong_response_us = congested_respns_us;
1613 bcp->cong_reps = congested_reps;
1614 bcp->cong_period = congested_period;
1615 }
1616}
1617
1618/*
1619 * Scan all cpus to collect blade and socket summaries.
1620 */
1621static int __init get_cpu_topology(int base_pnode,
1622 struct uvhub_desc *uvhub_descs,
1623 unsigned char *uvhub_mask)
1624{
1625 int cpu;
1626 int pnode;
1627 int uvhub;
1628 int socket;
1629 struct bau_control *bcp;
1630 struct uvhub_desc *bdp;
1631 struct socket_desc *sdp;
1632
1633 for_each_present_cpu(cpu) {
1634 bcp = &per_cpu(bau_control, cpu);
1635
1636 memset(bcp, 0, sizeof(struct bau_control));
1637
1638 pnode = uv_cpu_hub_info(cpu)->pnode;
1639 if ((pnode - base_pnode) >= UV_DISTRIBUTION_SIZE) {
1640 printk(KERN_EMERG
1641 "cpu %d pnode %d-%d beyond %d; BAU disabled\n",
1642 cpu, pnode, base_pnode, UV_DISTRIBUTION_SIZE);
1643 return 1;
1644 }
1645
1646 bcp->osnode = cpu_to_node(cpu);
1647 bcp->partition_base_pnode = base_pnode;
1648
1649 uvhub = uv_cpu_hub_info(cpu)->numa_blade_id;
1650 *(uvhub_mask + (uvhub/8)) |= (1 << (uvhub%8));
1651 bdp = &uvhub_descs[uvhub];
1652
1653 bdp->num_cpus++;
1654 bdp->uvhub = uvhub;
1655 bdp->pnode = pnode;
1656
1657 /* kludge: 'assuming' one node per socket, and assuming that
1658 disabling a socket just leaves a gap in node numbers */
1659 socket = bcp->osnode & 1;
1660 bdp->socket_mask |= (1 << socket);
1661 sdp = &bdp->socket[socket];
1662 sdp->cpu_number[sdp->num_cpus] = cpu;
1663 sdp->num_cpus++;
1664 if (sdp->num_cpus > MAX_CPUS_PER_SOCKET) {
1665 printk(KERN_EMERG "%d cpus per socket invalid\n",
1666 sdp->num_cpus);
1667 return 1;
1668 }
1669 }
1670 return 0;
1671}
1672
1673/*
1674 * Each socket is to get a local array of pnodes/hubs.
1675 */
1676static void make_per_cpu_thp(struct bau_control *smaster)
1677{
1678 int cpu;
1679 size_t hpsz = sizeof(struct hub_and_pnode) * num_possible_cpus();
1680
1681 smaster->thp = kmalloc_node(hpsz, GFP_KERNEL, smaster->osnode);
1682 memset(smaster->thp, 0, hpsz);
1683 for_each_present_cpu(cpu) {
1684 smaster->thp[cpu].pnode = uv_cpu_hub_info(cpu)->pnode;
1685 smaster->thp[cpu].uvhub = uv_cpu_hub_info(cpu)->numa_blade_id;
1686 }
1687}
1688
1689/*
1690 * Initialize all the per_cpu information for the cpu's on a given socket,
1691 * given what has been gathered into the socket_desc struct.
1692 * And reports the chosen hub and socket masters back to the caller.
1693 */
1694static int scan_sock(struct socket_desc *sdp, struct uvhub_desc *bdp,
1695 struct bau_control **smasterp,
1696 struct bau_control **hmasterp)
1697{
1698 int i;
1699 int cpu;
1700 struct bau_control *bcp;
1701
1702 for (i = 0; i < sdp->num_cpus; i++) {
1703 cpu = sdp->cpu_number[i];
1704 bcp = &per_cpu(bau_control, cpu);
1705 bcp->cpu = cpu;
1706 if (i == 0) {
1707 *smasterp = bcp;
1708 if (!(*hmasterp))
1709 *hmasterp = bcp;
1710 }
1711 bcp->cpus_in_uvhub = bdp->num_cpus;
1712 bcp->cpus_in_socket = sdp->num_cpus;
1713 bcp->socket_master = *smasterp;
1714 bcp->uvhub = bdp->uvhub;
1715 bcp->uvhub_master = *hmasterp;
1716 bcp->uvhub_cpu = uv_cpu_hub_info(cpu)->blade_processor_id;
1717 if (bcp->uvhub_cpu >= MAX_CPUS_PER_UVHUB) {
1718 printk(KERN_EMERG "%d cpus per uvhub invalid\n",
1719 bcp->uvhub_cpu);
1720 return 1;
1721 }
1722 }
1723 return 0;
1724}
1725
1726/*
1727 * Summarize the blade and socket topology into the per_cpu structures.
1728 */
1729static int __init summarize_uvhub_sockets(int nuvhubs,
1730 struct uvhub_desc *uvhub_descs,
1731 unsigned char *uvhub_mask)
1732{
1733 int socket;
1734 int uvhub;
1735 unsigned short socket_mask;
1736
1737 for (uvhub = 0; uvhub < nuvhubs; uvhub++) {
1738 struct uvhub_desc *bdp;
1739 struct bau_control *smaster = NULL;
1740 struct bau_control *hmaster = NULL;
1741
1742 if (!(*(uvhub_mask + (uvhub/8)) & (1 << (uvhub%8))))
1743 continue;
1744
1745 bdp = &uvhub_descs[uvhub];
1746 socket_mask = bdp->socket_mask;
1747 socket = 0;
1748 while (socket_mask) {
1749 struct socket_desc *sdp;
1750 if ((socket_mask & 1)) {
1751 sdp = &bdp->socket[socket];
1752 if (scan_sock(sdp, bdp, &smaster, &hmaster))
1753 return 1;
1754 }
1755 socket++;
1756 socket_mask = (socket_mask >> 1);
1757 make_per_cpu_thp(smaster);
1758 }
1759 }
1760 return 0;
1761}
1762
1763/*
1764 * initialize the bau_control structure for each cpu
1765 */
1766static int __init init_per_cpu(int nuvhubs, int base_part_pnode)
1767{
1768 unsigned char *uvhub_mask;
1769 void *vp;
1770 struct uvhub_desc *uvhub_descs;
1771
1772 timeout_us = calculate_destination_timeout();
1773
1774 vp = kmalloc(nuvhubs * sizeof(struct uvhub_desc), GFP_KERNEL);
1775 uvhub_descs = (struct uvhub_desc *)vp;
1776 memset(uvhub_descs, 0, nuvhubs * sizeof(struct uvhub_desc));
1777 uvhub_mask = kzalloc((nuvhubs+7)/8, GFP_KERNEL);
1778
1779 if (get_cpu_topology(base_part_pnode, uvhub_descs, uvhub_mask))
1780 return 1;
1781
1782 if (summarize_uvhub_sockets(nuvhubs, uvhub_descs, uvhub_mask))
1783 return 1;
1784
1785 kfree(uvhub_descs);
1786 kfree(uvhub_mask);
1787 init_per_cpu_tunables();
1788 return 0;
1789}
1790
1791/*
1792 * Initialization of BAU-related structures
1793 */
1794static int __init uv_bau_init(void)
1795{
1796 int uvhub;
1797 int pnode;
1798 int nuvhubs;
1799 int cur_cpu;
1800 int cpus;
1801 int vector;
1802 cpumask_var_t *mask;
1803
1804 if (!is_uv_system())
1805 return 0;
1806
1807 if (nobau)
1808 return 0;
1809
1810 for_each_possible_cpu(cur_cpu) {
1811 mask = &per_cpu(uv_flush_tlb_mask, cur_cpu);
1812 zalloc_cpumask_var_node(mask, GFP_KERNEL, cpu_to_node(cur_cpu));
1813 }
1814
1815 uv_nshift = uv_hub_info->m_val;
1816 uv_mmask = (1UL << uv_hub_info->m_val) - 1;
1817 nuvhubs = uv_num_possible_blades();
1818 spin_lock_init(&disable_lock);
1819 congested_cycles = usec_2_cycles(congested_respns_us);
1820
1821 uv_base_pnode = 0x7fffffff;
1822 for (uvhub = 0; uvhub < nuvhubs; uvhub++) {
1823 cpus = uv_blade_nr_possible_cpus(uvhub);
1824 if (cpus && (uv_blade_to_pnode(uvhub) < uv_base_pnode))
1825 uv_base_pnode = uv_blade_to_pnode(uvhub);
1826 }
1827
1828 if (init_per_cpu(nuvhubs, uv_base_pnode)) {
1829 nobau = 1;
1830 return 0;
1831 }
1832
1833 vector = UV_BAU_MESSAGE;
1834 for_each_possible_blade(uvhub)
1835 if (uv_blade_nr_possible_cpus(uvhub))
1836 init_uvhub(uvhub, vector, uv_base_pnode);
1837
1838 enable_timeouts();
1839 alloc_intr_gate(vector, uv_bau_message_intr1);
1840
1841 for_each_possible_blade(uvhub) {
1842 if (uv_blade_nr_possible_cpus(uvhub)) {
1843 unsigned long val;
1844 unsigned long mmr;
1845 pnode = uv_blade_to_pnode(uvhub);
1846 /* INIT the bau */
1847 val = 1L << 63;
1848 write_gmmr_activation(pnode, val);
1849 mmr = 1; /* should be 1 to broadcast to both sockets */
1850 write_mmr_data_broadcast(pnode, mmr);
1851 }
1852 }
1853
1854 return 0;
1855}
1856core_initcall(uv_bau_init);
1857fs_initcall(uv_ptc_init);
diff --git a/arch/x86/platform/uv/uv_irq.c b/arch/x86/platform/uv/uv_irq.c
new file mode 100644
index 000000000000..374a05d8ad22
--- /dev/null
+++ b/arch/x86/platform/uv/uv_irq.c
@@ -0,0 +1,285 @@
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * SGI UV IRQ functions
7 *
8 * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved.
9 */
10
11#include <linux/module.h>
12#include <linux/rbtree.h>
13#include <linux/slab.h>
14#include <linux/irq.h>
15
16#include <asm/apic.h>
17#include <asm/uv/uv_irq.h>
18#include <asm/uv/uv_hub.h>
19
20/* MMR offset and pnode of hub sourcing interrupts for a given irq */
21struct uv_irq_2_mmr_pnode{
22 struct rb_node list;
23 unsigned long offset;
24 int pnode;
25 int irq;
26};
27
28static spinlock_t uv_irq_lock;
29static struct rb_root uv_irq_root;
30
31static int uv_set_irq_affinity(struct irq_data *, const struct cpumask *, bool);
32
33static void uv_noop(struct irq_data *data) { }
34
35static void uv_ack_apic(struct irq_data *data)
36{
37 ack_APIC_irq();
38}
39
40static struct irq_chip uv_irq_chip = {
41 .name = "UV-CORE",
42 .irq_mask = uv_noop,
43 .irq_unmask = uv_noop,
44 .irq_eoi = uv_ack_apic,
45 .irq_set_affinity = uv_set_irq_affinity,
46};
47
48/*
49 * Add offset and pnode information of the hub sourcing interrupts to the
50 * rb tree for a specific irq.
51 */
52static int uv_set_irq_2_mmr_info(int irq, unsigned long offset, unsigned blade)
53{
54 struct rb_node **link = &uv_irq_root.rb_node;
55 struct rb_node *parent = NULL;
56 struct uv_irq_2_mmr_pnode *n;
57 struct uv_irq_2_mmr_pnode *e;
58 unsigned long irqflags;
59
60 n = kmalloc_node(sizeof(struct uv_irq_2_mmr_pnode), GFP_KERNEL,
61 uv_blade_to_memory_nid(blade));
62 if (!n)
63 return -ENOMEM;
64
65 n->irq = irq;
66 n->offset = offset;
67 n->pnode = uv_blade_to_pnode(blade);
68 spin_lock_irqsave(&uv_irq_lock, irqflags);
69 /* Find the right place in the rbtree: */
70 while (*link) {
71 parent = *link;
72 e = rb_entry(parent, struct uv_irq_2_mmr_pnode, list);
73
74 if (unlikely(irq == e->irq)) {
75 /* irq entry exists */
76 e->pnode = uv_blade_to_pnode(blade);
77 e->offset = offset;
78 spin_unlock_irqrestore(&uv_irq_lock, irqflags);
79 kfree(n);
80 return 0;
81 }
82
83 if (irq < e->irq)
84 link = &(*link)->rb_left;
85 else
86 link = &(*link)->rb_right;
87 }
88
89 /* Insert the node into the rbtree. */
90 rb_link_node(&n->list, parent, link);
91 rb_insert_color(&n->list, &uv_irq_root);
92
93 spin_unlock_irqrestore(&uv_irq_lock, irqflags);
94 return 0;
95}
96
97/* Retrieve offset and pnode information from the rb tree for a specific irq */
98int uv_irq_2_mmr_info(int irq, unsigned long *offset, int *pnode)
99{
100 struct uv_irq_2_mmr_pnode *e;
101 struct rb_node *n;
102 unsigned long irqflags;
103
104 spin_lock_irqsave(&uv_irq_lock, irqflags);
105 n = uv_irq_root.rb_node;
106 while (n) {
107 e = rb_entry(n, struct uv_irq_2_mmr_pnode, list);
108
109 if (e->irq == irq) {
110 *offset = e->offset;
111 *pnode = e->pnode;
112 spin_unlock_irqrestore(&uv_irq_lock, irqflags);
113 return 0;
114 }
115
116 if (irq < e->irq)
117 n = n->rb_left;
118 else
119 n = n->rb_right;
120 }
121 spin_unlock_irqrestore(&uv_irq_lock, irqflags);
122 return -1;
123}
124
125/*
126 * Re-target the irq to the specified CPU and enable the specified MMR located
127 * on the specified blade to allow the sending of MSIs to the specified CPU.
128 */
129static int
130arch_enable_uv_irq(char *irq_name, unsigned int irq, int cpu, int mmr_blade,
131 unsigned long mmr_offset, int limit)
132{
133 const struct cpumask *eligible_cpu = cpumask_of(cpu);
134 struct irq_cfg *cfg = irq_get_chip_data(irq);
135 unsigned long mmr_value;
136 struct uv_IO_APIC_route_entry *entry;
137 int mmr_pnode, err;
138
139 BUILD_BUG_ON(sizeof(struct uv_IO_APIC_route_entry) !=
140 sizeof(unsigned long));
141
142 err = assign_irq_vector(irq, cfg, eligible_cpu);
143 if (err != 0)
144 return err;
145
146 if (limit == UV_AFFINITY_CPU)
147 irq_set_status_flags(irq, IRQ_NO_BALANCING);
148 else
149 irq_set_status_flags(irq, IRQ_MOVE_PCNTXT);
150
151 irq_set_chip_and_handler_name(irq, &uv_irq_chip, handle_percpu_irq,
152 irq_name);
153
154 mmr_value = 0;
155 entry = (struct uv_IO_APIC_route_entry *)&mmr_value;
156 entry->vector = cfg->vector;
157 entry->delivery_mode = apic->irq_delivery_mode;
158 entry->dest_mode = apic->irq_dest_mode;
159 entry->polarity = 0;
160 entry->trigger = 0;
161 entry->mask = 0;
162 entry->dest = apic->cpu_mask_to_apicid(eligible_cpu);
163
164 mmr_pnode = uv_blade_to_pnode(mmr_blade);
165 uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value);
166
167 if (cfg->move_in_progress)
168 send_cleanup_vector(cfg);
169
170 return irq;
171}
172
173/*
174 * Disable the specified MMR located on the specified blade so that MSIs are
175 * longer allowed to be sent.
176 */
177static void arch_disable_uv_irq(int mmr_pnode, unsigned long mmr_offset)
178{
179 unsigned long mmr_value;
180 struct uv_IO_APIC_route_entry *entry;
181
182 BUILD_BUG_ON(sizeof(struct uv_IO_APIC_route_entry) !=
183 sizeof(unsigned long));
184
185 mmr_value = 0;
186 entry = (struct uv_IO_APIC_route_entry *)&mmr_value;
187 entry->mask = 1;
188
189 uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value);
190}
191
192static int
193uv_set_irq_affinity(struct irq_data *data, const struct cpumask *mask,
194 bool force)
195{
196 struct irq_cfg *cfg = data->chip_data;
197 unsigned int dest;
198 unsigned long mmr_value, mmr_offset;
199 struct uv_IO_APIC_route_entry *entry;
200 int mmr_pnode;
201
202 if (__ioapic_set_affinity(data, mask, &dest))
203 return -1;
204
205 mmr_value = 0;
206 entry = (struct uv_IO_APIC_route_entry *)&mmr_value;
207
208 entry->vector = cfg->vector;
209 entry->delivery_mode = apic->irq_delivery_mode;
210 entry->dest_mode = apic->irq_dest_mode;
211 entry->polarity = 0;
212 entry->trigger = 0;
213 entry->mask = 0;
214 entry->dest = dest;
215
216 /* Get previously stored MMR and pnode of hub sourcing interrupts */
217 if (uv_irq_2_mmr_info(data->irq, &mmr_offset, &mmr_pnode))
218 return -1;
219
220 uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value);
221
222 if (cfg->move_in_progress)
223 send_cleanup_vector(cfg);
224
225 return 0;
226}
227
228/*
229 * Set up a mapping of an available irq and vector, and enable the specified
230 * MMR that defines the MSI that is to be sent to the specified CPU when an
231 * interrupt is raised.
232 */
233int uv_setup_irq(char *irq_name, int cpu, int mmr_blade,
234 unsigned long mmr_offset, int limit)
235{
236 int irq, ret;
237
238 irq = create_irq_nr(NR_IRQS_LEGACY, uv_blade_to_memory_nid(mmr_blade));
239
240 if (irq <= 0)
241 return -EBUSY;
242
243 ret = arch_enable_uv_irq(irq_name, irq, cpu, mmr_blade, mmr_offset,
244 limit);
245 if (ret == irq)
246 uv_set_irq_2_mmr_info(irq, mmr_offset, mmr_blade);
247 else
248 destroy_irq(irq);
249
250 return ret;
251}
252EXPORT_SYMBOL_GPL(uv_setup_irq);
253
254/*
255 * Tear down a mapping of an irq and vector, and disable the specified MMR that
256 * defined the MSI that was to be sent to the specified CPU when an interrupt
257 * was raised.
258 *
259 * Set mmr_blade and mmr_offset to what was passed in on uv_setup_irq().
260 */
261void uv_teardown_irq(unsigned int irq)
262{
263 struct uv_irq_2_mmr_pnode *e;
264 struct rb_node *n;
265 unsigned long irqflags;
266
267 spin_lock_irqsave(&uv_irq_lock, irqflags);
268 n = uv_irq_root.rb_node;
269 while (n) {
270 e = rb_entry(n, struct uv_irq_2_mmr_pnode, list);
271 if (e->irq == irq) {
272 arch_disable_uv_irq(e->pnode, e->offset);
273 rb_erase(n, &uv_irq_root);
274 kfree(e);
275 break;
276 }
277 if (irq < e->irq)
278 n = n->rb_left;
279 else
280 n = n->rb_right;
281 }
282 spin_unlock_irqrestore(&uv_irq_lock, irqflags);
283 destroy_irq(irq);
284}
285EXPORT_SYMBOL_GPL(uv_teardown_irq);
diff --git a/arch/x86/platform/uv/uv_sysfs.c b/arch/x86/platform/uv/uv_sysfs.c
new file mode 100644
index 000000000000..309c70fb7759
--- /dev/null
+++ b/arch/x86/platform/uv/uv_sysfs.c
@@ -0,0 +1,76 @@
1/*
2 * This file supports the /sys/firmware/sgi_uv interfaces for SGI UV.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
19 * Copyright (c) Russ Anderson
20 */
21
22#include <linux/sysdev.h>
23#include <asm/uv/bios.h>
24#include <asm/uv/uv.h>
25
26struct kobject *sgi_uv_kobj;
27
28static ssize_t partition_id_show(struct kobject *kobj,
29 struct kobj_attribute *attr, char *buf)
30{
31 return snprintf(buf, PAGE_SIZE, "%ld\n", sn_partition_id);
32}
33
34static ssize_t coherence_id_show(struct kobject *kobj,
35 struct kobj_attribute *attr, char *buf)
36{
37 return snprintf(buf, PAGE_SIZE, "%ld\n", partition_coherence_id());
38}
39
40static struct kobj_attribute partition_id_attr =
41 __ATTR(partition_id, S_IRUGO, partition_id_show, NULL);
42
43static struct kobj_attribute coherence_id_attr =
44 __ATTR(coherence_id, S_IRUGO, coherence_id_show, NULL);
45
46
47static int __init sgi_uv_sysfs_init(void)
48{
49 unsigned long ret;
50
51 if (!is_uv_system())
52 return -ENODEV;
53
54 if (!sgi_uv_kobj)
55 sgi_uv_kobj = kobject_create_and_add("sgi_uv", firmware_kobj);
56 if (!sgi_uv_kobj) {
57 printk(KERN_WARNING "kobject_create_and_add sgi_uv failed\n");
58 return -EINVAL;
59 }
60
61 ret = sysfs_create_file(sgi_uv_kobj, &partition_id_attr.attr);
62 if (ret) {
63 printk(KERN_WARNING "sysfs_create_file partition_id failed\n");
64 return ret;
65 }
66
67 ret = sysfs_create_file(sgi_uv_kobj, &coherence_id_attr.attr);
68 if (ret) {
69 printk(KERN_WARNING "sysfs_create_file coherence_id failed\n");
70 return ret;
71 }
72
73 return 0;
74}
75
76device_initcall(sgi_uv_sysfs_init);
diff --git a/arch/x86/platform/uv/uv_time.c b/arch/x86/platform/uv/uv_time.c
new file mode 100644
index 000000000000..9f29a01ee1b3
--- /dev/null
+++ b/arch/x86/platform/uv/uv_time.c
@@ -0,0 +1,429 @@
1/*
2 * SGI RTC clock/timer routines.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 * Copyright (c) 2009 Silicon Graphics, Inc. All Rights Reserved.
19 * Copyright (c) Dimitri Sivanich
20 */
21#include <linux/clockchips.h>
22#include <linux/slab.h>
23
24#include <asm/uv/uv_mmrs.h>
25#include <asm/uv/uv_hub.h>
26#include <asm/uv/bios.h>
27#include <asm/uv/uv.h>
28#include <asm/apic.h>
29#include <asm/cpu.h>
30
31#define RTC_NAME "sgi_rtc"
32
33static cycle_t uv_read_rtc(struct clocksource *cs);
34static int uv_rtc_next_event(unsigned long, struct clock_event_device *);
35static void uv_rtc_timer_setup(enum clock_event_mode,
36 struct clock_event_device *);
37
38static struct clocksource clocksource_uv = {
39 .name = RTC_NAME,
40 .rating = 400,
41 .read = uv_read_rtc,
42 .mask = (cycle_t)UVH_RTC_REAL_TIME_CLOCK_MASK,
43 .flags = CLOCK_SOURCE_IS_CONTINUOUS,
44};
45
46static struct clock_event_device clock_event_device_uv = {
47 .name = RTC_NAME,
48 .features = CLOCK_EVT_FEAT_ONESHOT,
49 .shift = 20,
50 .rating = 400,
51 .irq = -1,
52 .set_next_event = uv_rtc_next_event,
53 .set_mode = uv_rtc_timer_setup,
54 .event_handler = NULL,
55};
56
57static DEFINE_PER_CPU(struct clock_event_device, cpu_ced);
58
59/* There is one of these allocated per node */
60struct uv_rtc_timer_head {
61 spinlock_t lock;
62 /* next cpu waiting for timer, local node relative: */
63 int next_cpu;
64 /* number of cpus on this node: */
65 int ncpus;
66 struct {
67 int lcpu; /* systemwide logical cpu number */
68 u64 expires; /* next timer expiration for this cpu */
69 } cpu[1];
70};
71
72/*
73 * Access to uv_rtc_timer_head via blade id.
74 */
75static struct uv_rtc_timer_head **blade_info __read_mostly;
76
77static int uv_rtc_evt_enable;
78
79/*
80 * Hardware interface routines
81 */
82
83/* Send IPIs to another node */
84static void uv_rtc_send_IPI(int cpu)
85{
86 unsigned long apicid, val;
87 int pnode;
88
89 apicid = cpu_physical_id(cpu);
90 pnode = uv_apicid_to_pnode(apicid);
91 apicid |= uv_apicid_hibits;
92 val = (1UL << UVH_IPI_INT_SEND_SHFT) |
93 (apicid << UVH_IPI_INT_APIC_ID_SHFT) |
94 (X86_PLATFORM_IPI_VECTOR << UVH_IPI_INT_VECTOR_SHFT);
95
96 uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
97}
98
99/* Check for an RTC interrupt pending */
100static int uv_intr_pending(int pnode)
101{
102 if (is_uv1_hub())
103 return uv_read_global_mmr64(pnode, UVH_EVENT_OCCURRED0) &
104 UV1H_EVENT_OCCURRED0_RTC1_MASK;
105 else
106 return uv_read_global_mmr64(pnode, UV2H_EVENT_OCCURRED2) &
107 UV2H_EVENT_OCCURRED2_RTC_1_MASK;
108}
109
110/* Setup interrupt and return non-zero if early expiration occurred. */
111static int uv_setup_intr(int cpu, u64 expires)
112{
113 u64 val;
114 unsigned long apicid = cpu_physical_id(cpu) | uv_apicid_hibits;
115 int pnode = uv_cpu_to_pnode(cpu);
116
117 uv_write_global_mmr64(pnode, UVH_RTC1_INT_CONFIG,
118 UVH_RTC1_INT_CONFIG_M_MASK);
119 uv_write_global_mmr64(pnode, UVH_INT_CMPB, -1L);
120
121 if (is_uv1_hub())
122 uv_write_global_mmr64(pnode, UVH_EVENT_OCCURRED0_ALIAS,
123 UV1H_EVENT_OCCURRED0_RTC1_MASK);
124 else
125 uv_write_global_mmr64(pnode, UV2H_EVENT_OCCURRED2_ALIAS,
126 UV2H_EVENT_OCCURRED2_RTC_1_MASK);
127
128 val = (X86_PLATFORM_IPI_VECTOR << UVH_RTC1_INT_CONFIG_VECTOR_SHFT) |
129 ((u64)apicid << UVH_RTC1_INT_CONFIG_APIC_ID_SHFT);
130
131 /* Set configuration */
132 uv_write_global_mmr64(pnode, UVH_RTC1_INT_CONFIG, val);
133 /* Initialize comparator value */
134 uv_write_global_mmr64(pnode, UVH_INT_CMPB, expires);
135
136 if (uv_read_rtc(NULL) <= expires)
137 return 0;
138
139 return !uv_intr_pending(pnode);
140}
141
142/*
143 * Per-cpu timer tracking routines
144 */
145
146static __init void uv_rtc_deallocate_timers(void)
147{
148 int bid;
149
150 for_each_possible_blade(bid) {
151 kfree(blade_info[bid]);
152 }
153 kfree(blade_info);
154}
155
156/* Allocate per-node list of cpu timer expiration times. */
157static __init int uv_rtc_allocate_timers(void)
158{
159 int cpu;
160
161 blade_info = kmalloc(uv_possible_blades * sizeof(void *), GFP_KERNEL);
162 if (!blade_info)
163 return -ENOMEM;
164 memset(blade_info, 0, uv_possible_blades * sizeof(void *));
165
166 for_each_present_cpu(cpu) {
167 int nid = cpu_to_node(cpu);
168 int bid = uv_cpu_to_blade_id(cpu);
169 int bcpu = uv_cpu_hub_info(cpu)->blade_processor_id;
170 struct uv_rtc_timer_head *head = blade_info[bid];
171
172 if (!head) {
173 head = kmalloc_node(sizeof(struct uv_rtc_timer_head) +
174 (uv_blade_nr_possible_cpus(bid) *
175 2 * sizeof(u64)),
176 GFP_KERNEL, nid);
177 if (!head) {
178 uv_rtc_deallocate_timers();
179 return -ENOMEM;
180 }
181 spin_lock_init(&head->lock);
182 head->ncpus = uv_blade_nr_possible_cpus(bid);
183 head->next_cpu = -1;
184 blade_info[bid] = head;
185 }
186
187 head->cpu[bcpu].lcpu = cpu;
188 head->cpu[bcpu].expires = ULLONG_MAX;
189 }
190
191 return 0;
192}
193
194/* Find and set the next expiring timer. */
195static void uv_rtc_find_next_timer(struct uv_rtc_timer_head *head, int pnode)
196{
197 u64 lowest = ULLONG_MAX;
198 int c, bcpu = -1;
199
200 head->next_cpu = -1;
201 for (c = 0; c < head->ncpus; c++) {
202 u64 exp = head->cpu[c].expires;
203 if (exp < lowest) {
204 bcpu = c;
205 lowest = exp;
206 }
207 }
208 if (bcpu >= 0) {
209 head->next_cpu = bcpu;
210 c = head->cpu[bcpu].lcpu;
211 if (uv_setup_intr(c, lowest))
212 /* If we didn't set it up in time, trigger */
213 uv_rtc_send_IPI(c);
214 } else {
215 uv_write_global_mmr64(pnode, UVH_RTC1_INT_CONFIG,
216 UVH_RTC1_INT_CONFIG_M_MASK);
217 }
218}
219
220/*
221 * Set expiration time for current cpu.
222 *
223 * Returns 1 if we missed the expiration time.
224 */
225static int uv_rtc_set_timer(int cpu, u64 expires)
226{
227 int pnode = uv_cpu_to_pnode(cpu);
228 int bid = uv_cpu_to_blade_id(cpu);
229 struct uv_rtc_timer_head *head = blade_info[bid];
230 int bcpu = uv_cpu_hub_info(cpu)->blade_processor_id;
231 u64 *t = &head->cpu[bcpu].expires;
232 unsigned long flags;
233 int next_cpu;
234
235 spin_lock_irqsave(&head->lock, flags);
236
237 next_cpu = head->next_cpu;
238 *t = expires;
239
240 /* Will this one be next to go off? */
241 if (next_cpu < 0 || bcpu == next_cpu ||
242 expires < head->cpu[next_cpu].expires) {
243 head->next_cpu = bcpu;
244 if (uv_setup_intr(cpu, expires)) {
245 *t = ULLONG_MAX;
246 uv_rtc_find_next_timer(head, pnode);
247 spin_unlock_irqrestore(&head->lock, flags);
248 return -ETIME;
249 }
250 }
251
252 spin_unlock_irqrestore(&head->lock, flags);
253 return 0;
254}
255
256/*
257 * Unset expiration time for current cpu.
258 *
259 * Returns 1 if this timer was pending.
260 */
261static int uv_rtc_unset_timer(int cpu, int force)
262{
263 int pnode = uv_cpu_to_pnode(cpu);
264 int bid = uv_cpu_to_blade_id(cpu);
265 struct uv_rtc_timer_head *head = blade_info[bid];
266 int bcpu = uv_cpu_hub_info(cpu)->blade_processor_id;
267 u64 *t = &head->cpu[bcpu].expires;
268 unsigned long flags;
269 int rc = 0;
270
271 spin_lock_irqsave(&head->lock, flags);
272
273 if ((head->next_cpu == bcpu && uv_read_rtc(NULL) >= *t) || force)
274 rc = 1;
275
276 if (rc) {
277 *t = ULLONG_MAX;
278 /* Was the hardware setup for this timer? */
279 if (head->next_cpu == bcpu)
280 uv_rtc_find_next_timer(head, pnode);
281 }
282
283 spin_unlock_irqrestore(&head->lock, flags);
284
285 return rc;
286}
287
288
289/*
290 * Kernel interface routines.
291 */
292
293/*
294 * Read the RTC.
295 *
296 * Starting with HUB rev 2.0, the UV RTC register is replicated across all
297 * cachelines of it's own page. This allows faster simultaneous reads
298 * from a given socket.
299 */
300static cycle_t uv_read_rtc(struct clocksource *cs)
301{
302 unsigned long offset;
303
304 if (uv_get_min_hub_revision_id() == 1)
305 offset = 0;
306 else
307 offset = (uv_blade_processor_id() * L1_CACHE_BYTES) % PAGE_SIZE;
308
309 return (cycle_t)uv_read_local_mmr(UVH_RTC | offset);
310}
311
312/*
313 * Program the next event, relative to now
314 */
315static int uv_rtc_next_event(unsigned long delta,
316 struct clock_event_device *ced)
317{
318 int ced_cpu = cpumask_first(ced->cpumask);
319
320 return uv_rtc_set_timer(ced_cpu, delta + uv_read_rtc(NULL));
321}
322
323/*
324 * Setup the RTC timer in oneshot mode
325 */
326static void uv_rtc_timer_setup(enum clock_event_mode mode,
327 struct clock_event_device *evt)
328{
329 int ced_cpu = cpumask_first(evt->cpumask);
330
331 switch (mode) {
332 case CLOCK_EVT_MODE_PERIODIC:
333 case CLOCK_EVT_MODE_ONESHOT:
334 case CLOCK_EVT_MODE_RESUME:
335 /* Nothing to do here yet */
336 break;
337 case CLOCK_EVT_MODE_UNUSED:
338 case CLOCK_EVT_MODE_SHUTDOWN:
339 uv_rtc_unset_timer(ced_cpu, 1);
340 break;
341 }
342}
343
344static void uv_rtc_interrupt(void)
345{
346 int cpu = smp_processor_id();
347 struct clock_event_device *ced = &per_cpu(cpu_ced, cpu);
348
349 if (!ced || !ced->event_handler)
350 return;
351
352 if (uv_rtc_unset_timer(cpu, 0) != 1)
353 return;
354
355 ced->event_handler(ced);
356}
357
358static int __init uv_enable_evt_rtc(char *str)
359{
360 uv_rtc_evt_enable = 1;
361
362 return 1;
363}
364__setup("uvrtcevt", uv_enable_evt_rtc);
365
366static __init void uv_rtc_register_clockevents(struct work_struct *dummy)
367{
368 struct clock_event_device *ced = &__get_cpu_var(cpu_ced);
369
370 *ced = clock_event_device_uv;
371 ced->cpumask = cpumask_of(smp_processor_id());
372 clockevents_register_device(ced);
373}
374
375static __init int uv_rtc_setup_clock(void)
376{
377 int rc;
378
379 if (!is_uv_system())
380 return -ENODEV;
381
382 /* If single blade, prefer tsc */
383 if (uv_num_possible_blades() == 1)
384 clocksource_uv.rating = 250;
385
386 rc = clocksource_register_hz(&clocksource_uv, sn_rtc_cycles_per_second);
387 if (rc)
388 printk(KERN_INFO "UV RTC clocksource failed rc %d\n", rc);
389 else
390 printk(KERN_INFO "UV RTC clocksource registered freq %lu MHz\n",
391 sn_rtc_cycles_per_second/(unsigned long)1E6);
392
393 if (rc || !uv_rtc_evt_enable || x86_platform_ipi_callback)
394 return rc;
395
396 /* Setup and register clockevents */
397 rc = uv_rtc_allocate_timers();
398 if (rc)
399 goto error;
400
401 x86_platform_ipi_callback = uv_rtc_interrupt;
402
403 clock_event_device_uv.mult = div_sc(sn_rtc_cycles_per_second,
404 NSEC_PER_SEC, clock_event_device_uv.shift);
405
406 clock_event_device_uv.min_delta_ns = NSEC_PER_SEC /
407 sn_rtc_cycles_per_second;
408
409 clock_event_device_uv.max_delta_ns = clocksource_uv.mask *
410 (NSEC_PER_SEC / sn_rtc_cycles_per_second);
411
412 rc = schedule_on_each_cpu(uv_rtc_register_clockevents);
413 if (rc) {
414 x86_platform_ipi_callback = NULL;
415 uv_rtc_deallocate_timers();
416 goto error;
417 }
418
419 printk(KERN_INFO "UV RTC clockevents registered\n");
420
421 return 0;
422
423error:
424 clocksource_unregister(&clocksource_uv);
425 printk(KERN_INFO "UV RTC clockevents failed rc %d\n", rc);
426
427 return rc;
428}
429arch_initcall(uv_rtc_setup_clock);
diff --git a/arch/x86/platform/visws/Makefile b/arch/x86/platform/visws/Makefile
new file mode 100644
index 000000000000..91bc17ab2fd5
--- /dev/null
+++ b/arch/x86/platform/visws/Makefile
@@ -0,0 +1 @@
obj-$(CONFIG_X86_VISWS) += visws_quirks.o
diff --git a/arch/x86/platform/visws/visws_quirks.c b/arch/x86/platform/visws/visws_quirks.c
new file mode 100644
index 000000000000..c7abf13a213f
--- /dev/null
+++ b/arch/x86/platform/visws/visws_quirks.c
@@ -0,0 +1,608 @@
1/*
2 * SGI Visual Workstation support and quirks, unmaintained.
3 *
4 * Split out from setup.c by davej@suse.de
5 *
6 * Copyright (C) 1999 Bent Hagemark, Ingo Molnar
7 *
8 * SGI Visual Workstation interrupt controller
9 *
10 * The Cobalt system ASIC in the Visual Workstation contains a "Cobalt" APIC
11 * which serves as the main interrupt controller in the system. Non-legacy
12 * hardware in the system uses this controller directly. Legacy devices
13 * are connected to the PIIX4 which in turn has its 8259(s) connected to
14 * a of the Cobalt APIC entry.
15 *
16 * 09/02/2000 - Updated for 2.4 by jbarnes@sgi.com
17 *
18 * 25/11/2002 - Updated for 2.5 by Andrey Panin <pazke@orbita1.ru>
19 */
20#include <linux/interrupt.h>
21#include <linux/module.h>
22#include <linux/init.h>
23#include <linux/smp.h>
24
25#include <asm/visws/cobalt.h>
26#include <asm/visws/piix4.h>
27#include <asm/io_apic.h>
28#include <asm/fixmap.h>
29#include <asm/reboot.h>
30#include <asm/setup.h>
31#include <asm/apic.h>
32#include <asm/e820.h>
33#include <asm/time.h>
34#include <asm/io.h>
35
36#include <linux/kernel_stat.h>
37
38#include <asm/i8259.h>
39#include <asm/irq_vectors.h>
40#include <asm/visws/lithium.h>
41
42#include <linux/sched.h>
43#include <linux/kernel.h>
44#include <linux/pci.h>
45#include <linux/pci_ids.h>
46
47extern int no_broadcast;
48
49char visws_board_type = -1;
50char visws_board_rev = -1;
51
52static void __init visws_time_init(void)
53{
54 printk(KERN_INFO "Starting Cobalt Timer system clock\n");
55
56 /* Set the countdown value */
57 co_cpu_write(CO_CPU_TIMEVAL, CO_TIME_HZ/HZ);
58
59 /* Start the timer */
60 co_cpu_write(CO_CPU_CTRL, co_cpu_read(CO_CPU_CTRL) | CO_CTRL_TIMERUN);
61
62 /* Enable (unmask) the timer interrupt */
63 co_cpu_write(CO_CPU_CTRL, co_cpu_read(CO_CPU_CTRL) & ~CO_CTRL_TIMEMASK);
64
65 setup_default_timer_irq();
66}
67
68/* Replaces the default init_ISA_irqs in the generic setup */
69static void __init visws_pre_intr_init(void);
70
71/* Quirk for machine specific memory setup. */
72
73#define MB (1024 * 1024)
74
75unsigned long sgivwfb_mem_phys;
76unsigned long sgivwfb_mem_size;
77EXPORT_SYMBOL(sgivwfb_mem_phys);
78EXPORT_SYMBOL(sgivwfb_mem_size);
79
80long long mem_size __initdata = 0;
81
82static char * __init visws_memory_setup(void)
83{
84 long long gfx_mem_size = 8 * MB;
85
86 mem_size = boot_params.alt_mem_k;
87
88 if (!mem_size) {
89 printk(KERN_WARNING "Bootloader didn't set memory size, upgrade it !\n");
90 mem_size = 128 * MB;
91 }
92
93 /*
94 * this hardcodes the graphics memory to 8 MB
95 * it really should be sized dynamically (or at least
96 * set as a boot param)
97 */
98 if (!sgivwfb_mem_size) {
99 printk(KERN_WARNING "Defaulting to 8 MB framebuffer size\n");
100 sgivwfb_mem_size = 8 * MB;
101 }
102
103 /*
104 * Trim to nearest MB
105 */
106 sgivwfb_mem_size &= ~((1 << 20) - 1);
107 sgivwfb_mem_phys = mem_size - gfx_mem_size;
108
109 e820_add_region(0, LOWMEMSIZE(), E820_RAM);
110 e820_add_region(HIGH_MEMORY, mem_size - sgivwfb_mem_size - HIGH_MEMORY, E820_RAM);
111 e820_add_region(sgivwfb_mem_phys, sgivwfb_mem_size, E820_RESERVED);
112
113 return "PROM";
114}
115
116static void visws_machine_emergency_restart(void)
117{
118 /*
119 * Visual Workstations restart after this
120 * register is poked on the PIIX4
121 */
122 outb(PIIX4_RESET_VAL, PIIX4_RESET_PORT);
123}
124
125static void visws_machine_power_off(void)
126{
127 unsigned short pm_status;
128/* extern unsigned int pci_bus0; */
129
130 while ((pm_status = inw(PMSTS_PORT)) & 0x100)
131 outw(pm_status, PMSTS_PORT);
132
133 outw(PM_SUSPEND_ENABLE, PMCNTRL_PORT);
134
135 mdelay(10);
136
137#define PCI_CONF1_ADDRESS(bus, devfn, reg) \
138 (0x80000000 | (bus << 16) | (devfn << 8) | (reg & ~3))
139
140/* outl(PCI_CONF1_ADDRESS(pci_bus0, SPECIAL_DEV, SPECIAL_REG), 0xCF8); */
141 outl(PIIX_SPECIAL_STOP, 0xCFC);
142}
143
144static void __init visws_get_smp_config(unsigned int early)
145{
146}
147
148/*
149 * The Visual Workstation is Intel MP compliant in the hardware
150 * sense, but it doesn't have a BIOS(-configuration table).
151 * No problem for Linux.
152 */
153
154static void __init MP_processor_info(struct mpc_cpu *m)
155{
156 int ver, logical_apicid;
157 physid_mask_t apic_cpus;
158
159 if (!(m->cpuflag & CPU_ENABLED))
160 return;
161
162 logical_apicid = m->apicid;
163 printk(KERN_INFO "%sCPU #%d %u:%u APIC version %d\n",
164 m->cpuflag & CPU_BOOTPROCESSOR ? "Bootup " : "",
165 m->apicid, (m->cpufeature & CPU_FAMILY_MASK) >> 8,
166 (m->cpufeature & CPU_MODEL_MASK) >> 4, m->apicver);
167
168 if (m->cpuflag & CPU_BOOTPROCESSOR)
169 boot_cpu_physical_apicid = m->apicid;
170
171 ver = m->apicver;
172 if ((ver >= 0x14 && m->apicid >= 0xff) || m->apicid >= 0xf) {
173 printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
174 m->apicid, MAX_LOCAL_APIC);
175 return;
176 }
177
178 apic->apicid_to_cpu_present(m->apicid, &apic_cpus);
179 physids_or(phys_cpu_present_map, phys_cpu_present_map, apic_cpus);
180 /*
181 * Validate version
182 */
183 if (ver == 0x0) {
184 printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! "
185 "fixing up to 0x10. (tell your hw vendor)\n",
186 m->apicid);
187 ver = 0x10;
188 }
189 apic_version[m->apicid] = ver;
190}
191
192static void __init visws_find_smp_config(void)
193{
194 struct mpc_cpu *mp = phys_to_virt(CO_CPU_TAB_PHYS);
195 unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS));
196
197 if (ncpus > CO_CPU_MAX) {
198 printk(KERN_WARNING "find_visws_smp: got cpu count of %d at %p\n",
199 ncpus, mp);
200
201 ncpus = CO_CPU_MAX;
202 }
203
204 if (ncpus > setup_max_cpus)
205 ncpus = setup_max_cpus;
206
207#ifdef CONFIG_X86_LOCAL_APIC
208 smp_found_config = 1;
209#endif
210 while (ncpus--)
211 MP_processor_info(mp++);
212
213 mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
214}
215
216static void visws_trap_init(void);
217
218void __init visws_early_detect(void)
219{
220 int raw;
221
222 visws_board_type = (char)(inb_p(PIIX_GPI_BD_REG) & PIIX_GPI_BD_REG)
223 >> PIIX_GPI_BD_SHIFT;
224
225 if (visws_board_type < 0)
226 return;
227
228 /*
229 * Override the default platform setup functions
230 */
231 x86_init.resources.memory_setup = visws_memory_setup;
232 x86_init.mpparse.get_smp_config = visws_get_smp_config;
233 x86_init.mpparse.find_smp_config = visws_find_smp_config;
234 x86_init.irqs.pre_vector_init = visws_pre_intr_init;
235 x86_init.irqs.trap_init = visws_trap_init;
236 x86_init.timers.timer_init = visws_time_init;
237 x86_init.pci.init = pci_visws_init;
238 x86_init.pci.init_irq = x86_init_noop;
239
240 /*
241 * Install reboot quirks:
242 */
243 pm_power_off = visws_machine_power_off;
244 machine_ops.emergency_restart = visws_machine_emergency_restart;
245
246 /*
247 * Do not use broadcast IPIs:
248 */
249 no_broadcast = 0;
250
251#ifdef CONFIG_X86_IO_APIC
252 /*
253 * Turn off IO-APIC detection and initialization:
254 */
255 skip_ioapic_setup = 1;
256#endif
257
258 /*
259 * Get Board rev.
260 * First, we have to initialize the 307 part to allow us access
261 * to the GPIO registers. Let's map them at 0x0fc0 which is right
262 * after the PIIX4 PM section.
263 */
264 outb_p(SIO_DEV_SEL, SIO_INDEX);
265 outb_p(SIO_GP_DEV, SIO_DATA); /* Talk to GPIO regs. */
266
267 outb_p(SIO_DEV_MSB, SIO_INDEX);
268 outb_p(SIO_GP_MSB, SIO_DATA); /* MSB of GPIO base address */
269
270 outb_p(SIO_DEV_LSB, SIO_INDEX);
271 outb_p(SIO_GP_LSB, SIO_DATA); /* LSB of GPIO base address */
272
273 outb_p(SIO_DEV_ENB, SIO_INDEX);
274 outb_p(1, SIO_DATA); /* Enable GPIO registers. */
275
276 /*
277 * Now, we have to map the power management section to write
278 * a bit which enables access to the GPIO registers.
279 * What lunatic came up with this shit?
280 */
281 outb_p(SIO_DEV_SEL, SIO_INDEX);
282 outb_p(SIO_PM_DEV, SIO_DATA); /* Talk to GPIO regs. */
283
284 outb_p(SIO_DEV_MSB, SIO_INDEX);
285 outb_p(SIO_PM_MSB, SIO_DATA); /* MSB of PM base address */
286
287 outb_p(SIO_DEV_LSB, SIO_INDEX);
288 outb_p(SIO_PM_LSB, SIO_DATA); /* LSB of PM base address */
289
290 outb_p(SIO_DEV_ENB, SIO_INDEX);
291 outb_p(1, SIO_DATA); /* Enable PM registers. */
292
293 /*
294 * Now, write the PM register which enables the GPIO registers.
295 */
296 outb_p(SIO_PM_FER2, SIO_PM_INDEX);
297 outb_p(SIO_PM_GP_EN, SIO_PM_DATA);
298
299 /*
300 * Now, initialize the GPIO registers.
301 * We want them all to be inputs which is the
302 * power on default, so let's leave them alone.
303 * So, let's just read the board rev!
304 */
305 raw = inb_p(SIO_GP_DATA1);
306 raw &= 0x7f; /* 7 bits of valid board revision ID. */
307
308 if (visws_board_type == VISWS_320) {
309 if (raw < 0x6) {
310 visws_board_rev = 4;
311 } else if (raw < 0xc) {
312 visws_board_rev = 5;
313 } else {
314 visws_board_rev = 6;
315 }
316 } else if (visws_board_type == VISWS_540) {
317 visws_board_rev = 2;
318 } else {
319 visws_board_rev = raw;
320 }
321
322 printk(KERN_INFO "Silicon Graphics Visual Workstation %s (rev %d) detected\n",
323 (visws_board_type == VISWS_320 ? "320" :
324 (visws_board_type == VISWS_540 ? "540" :
325 "unknown")), visws_board_rev);
326}
327
328#define A01234 (LI_INTA_0 | LI_INTA_1 | LI_INTA_2 | LI_INTA_3 | LI_INTA_4)
329#define BCD (LI_INTB | LI_INTC | LI_INTD)
330#define ALLDEVS (A01234 | BCD)
331
332static __init void lithium_init(void)
333{
334 set_fixmap(FIX_LI_PCIA, LI_PCI_A_PHYS);
335 set_fixmap(FIX_LI_PCIB, LI_PCI_B_PHYS);
336
337 if ((li_pcia_read16(PCI_VENDOR_ID) != PCI_VENDOR_ID_SGI) ||
338 (li_pcia_read16(PCI_DEVICE_ID) != PCI_DEVICE_ID_SGI_LITHIUM)) {
339 printk(KERN_EMERG "Lithium hostbridge %c not found\n", 'A');
340/* panic("This machine is not SGI Visual Workstation 320/540"); */
341 }
342
343 if ((li_pcib_read16(PCI_VENDOR_ID) != PCI_VENDOR_ID_SGI) ||
344 (li_pcib_read16(PCI_DEVICE_ID) != PCI_DEVICE_ID_SGI_LITHIUM)) {
345 printk(KERN_EMERG "Lithium hostbridge %c not found\n", 'B');
346/* panic("This machine is not SGI Visual Workstation 320/540"); */
347 }
348
349 li_pcia_write16(LI_PCI_INTEN, ALLDEVS);
350 li_pcib_write16(LI_PCI_INTEN, ALLDEVS);
351}
352
353static __init void cobalt_init(void)
354{
355 /*
356 * On normal SMP PC this is used only with SMP, but we have to
357 * use it and set it up here to start the Cobalt clock
358 */
359 set_fixmap(FIX_APIC_BASE, APIC_DEFAULT_PHYS_BASE);
360 setup_local_APIC();
361 printk(KERN_INFO "Local APIC Version %#x, ID %#x\n",
362 (unsigned int)apic_read(APIC_LVR),
363 (unsigned int)apic_read(APIC_ID));
364
365 set_fixmap(FIX_CO_CPU, CO_CPU_PHYS);
366 set_fixmap(FIX_CO_APIC, CO_APIC_PHYS);
367 printk(KERN_INFO "Cobalt Revision %#lx, APIC ID %#lx\n",
368 co_cpu_read(CO_CPU_REV), co_apic_read(CO_APIC_ID));
369
370 /* Enable Cobalt APIC being careful to NOT change the ID! */
371 co_apic_write(CO_APIC_ID, co_apic_read(CO_APIC_ID) | CO_APIC_ENABLE);
372
373 printk(KERN_INFO "Cobalt APIC enabled: ID reg %#lx\n",
374 co_apic_read(CO_APIC_ID));
375}
376
377static void __init visws_trap_init(void)
378{
379 lithium_init();
380 cobalt_init();
381}
382
383/*
384 * IRQ controller / APIC support:
385 */
386
387static DEFINE_SPINLOCK(cobalt_lock);
388
389/*
390 * Set the given Cobalt APIC Redirection Table entry to point
391 * to the given IDT vector/index.
392 */
393static inline void co_apic_set(int entry, int irq)
394{
395 co_apic_write(CO_APIC_LO(entry), CO_APIC_LEVEL | (irq + FIRST_EXTERNAL_VECTOR));
396 co_apic_write(CO_APIC_HI(entry), 0);
397}
398
399/*
400 * Cobalt (IO)-APIC functions to handle PCI devices.
401 */
402static inline int co_apic_ide0_hack(void)
403{
404 extern char visws_board_type;
405 extern char visws_board_rev;
406
407 if (visws_board_type == VISWS_320 && visws_board_rev == 5)
408 return 5;
409 return CO_APIC_IDE0;
410}
411
412static int is_co_apic(unsigned int irq)
413{
414 if (IS_CO_APIC(irq))
415 return CO_APIC(irq);
416
417 switch (irq) {
418 case 0: return CO_APIC_CPU;
419 case CO_IRQ_IDE0: return co_apic_ide0_hack();
420 case CO_IRQ_IDE1: return CO_APIC_IDE1;
421 default: return -1;
422 }
423}
424
425
426/*
427 * This is the SGI Cobalt (IO-)APIC:
428 */
429static void enable_cobalt_irq(struct irq_data *data)
430{
431 co_apic_set(is_co_apic(data->irq), data->irq);
432}
433
434static void disable_cobalt_irq(struct irq_data *data)
435{
436 int entry = is_co_apic(data->irq);
437
438 co_apic_write(CO_APIC_LO(entry), CO_APIC_MASK);
439 co_apic_read(CO_APIC_LO(entry));
440}
441
442static void ack_cobalt_irq(struct irq_data *data)
443{
444 unsigned long flags;
445
446 spin_lock_irqsave(&cobalt_lock, flags);
447 disable_cobalt_irq(data);
448 apic_write(APIC_EOI, APIC_EIO_ACK);
449 spin_unlock_irqrestore(&cobalt_lock, flags);
450}
451
452static struct irq_chip cobalt_irq_type = {
453 .name = "Cobalt-APIC",
454 .irq_enable = enable_cobalt_irq,
455 .irq_disable = disable_cobalt_irq,
456 .irq_ack = ack_cobalt_irq,
457};
458
459
460/*
461 * This is the PIIX4-based 8259 that is wired up indirectly to Cobalt
462 * -- not the manner expected by the code in i8259.c.
463 *
464 * there is a 'master' physical interrupt source that gets sent to
465 * the CPU. But in the chipset there are various 'virtual' interrupts
466 * waiting to be handled. We represent this to Linux through a 'master'
467 * interrupt controller type, and through a special virtual interrupt-
468 * controller. Device drivers only see the virtual interrupt sources.
469 */
470static unsigned int startup_piix4_master_irq(struct irq_data *data)
471{
472 legacy_pic->init(0);
473 enable_cobalt_irq(data);
474 return 0;
475}
476
477static struct irq_chip piix4_master_irq_type = {
478 .name = "PIIX4-master",
479 .irq_startup = startup_piix4_master_irq,
480 .irq_ack = ack_cobalt_irq,
481};
482
483static void pii4_mask(struct irq_data *data) { }
484
485static struct irq_chip piix4_virtual_irq_type = {
486 .name = "PIIX4-virtual",
487 .irq_mask = pii4_mask,
488};
489
490/*
491 * PIIX4-8259 master/virtual functions to handle interrupt requests
492 * from legacy devices: floppy, parallel, serial, rtc.
493 *
494 * None of these get Cobalt APIC entries, neither do they have IDT
495 * entries. These interrupts are purely virtual and distributed from
496 * the 'master' interrupt source: CO_IRQ_8259.
497 *
498 * When the 8259 interrupts its handler figures out which of these
499 * devices is interrupting and dispatches to its handler.
500 *
501 * CAREFUL: devices see the 'virtual' interrupt only. Thus disable/
502 * enable_irq gets the right irq. This 'master' irq is never directly
503 * manipulated by any driver.
504 */
505static irqreturn_t piix4_master_intr(int irq, void *dev_id)
506{
507 unsigned long flags;
508 int realirq;
509
510 raw_spin_lock_irqsave(&i8259A_lock, flags);
511
512 /* Find out what's interrupting in the PIIX4 master 8259 */
513 outb(0x0c, 0x20); /* OCW3 Poll command */
514 realirq = inb(0x20);
515
516 /*
517 * Bit 7 == 0 means invalid/spurious
518 */
519 if (unlikely(!(realirq & 0x80)))
520 goto out_unlock;
521
522 realirq &= 7;
523
524 if (unlikely(realirq == 2)) {
525 outb(0x0c, 0xa0);
526 realirq = inb(0xa0);
527
528 if (unlikely(!(realirq & 0x80)))
529 goto out_unlock;
530
531 realirq = (realirq & 7) + 8;
532 }
533
534 /* mask and ack interrupt */
535 cached_irq_mask |= 1 << realirq;
536 if (unlikely(realirq > 7)) {
537 inb(0xa1);
538 outb(cached_slave_mask, 0xa1);
539 outb(0x60 + (realirq & 7), 0xa0);
540 outb(0x60 + 2, 0x20);
541 } else {
542 inb(0x21);
543 outb(cached_master_mask, 0x21);
544 outb(0x60 + realirq, 0x20);
545 }
546
547 raw_spin_unlock_irqrestore(&i8259A_lock, flags);
548
549 /*
550 * handle this 'virtual interrupt' as a Cobalt one now.
551 */
552 generic_handle_irq(realirq);
553
554 return IRQ_HANDLED;
555
556out_unlock:
557 raw_spin_unlock_irqrestore(&i8259A_lock, flags);
558 return IRQ_NONE;
559}
560
561static struct irqaction master_action = {
562 .handler = piix4_master_intr,
563 .name = "PIIX4-8259",
564 .flags = IRQF_NO_THREAD,
565};
566
567static struct irqaction cascade_action = {
568 .handler = no_action,
569 .name = "cascade",
570 .flags = IRQF_NO_THREAD,
571};
572
573static inline void set_piix4_virtual_irq_type(void)
574{
575 piix4_virtual_irq_type.irq_enable = i8259A_chip.irq_unmask;
576 piix4_virtual_irq_type.irq_disable = i8259A_chip.irq_mask;
577 piix4_virtual_irq_type.irq_unmask = i8259A_chip.irq_unmask;
578}
579
580static void __init visws_pre_intr_init(void)
581{
582 int i;
583
584 set_piix4_virtual_irq_type();
585
586 for (i = 0; i < CO_IRQ_APIC0 + CO_APIC_LAST + 1; i++) {
587 struct irq_chip *chip = NULL;
588
589 if (i == 0)
590 chip = &cobalt_irq_type;
591 else if (i == CO_IRQ_IDE0)
592 chip = &cobalt_irq_type;
593 else if (i == CO_IRQ_IDE1)
594 chip = &cobalt_irq_type;
595 else if (i == CO_IRQ_8259)
596 chip = &piix4_master_irq_type;
597 else if (i < CO_IRQ_APIC0)
598 chip = &piix4_virtual_irq_type;
599 else if (IS_CO_APIC(i))
600 chip = &cobalt_irq_type;
601
602 if (chip)
603 irq_set_chip(i, chip);
604 }
605
606 setup_irq(CO_IRQ_8259, &master_action);
607 setup_irq(2, &cascade_action);
608}
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-04 15:26:05 -0500