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-rw-r--r--arch/ppc64/Kconfig15
-rw-r--r--arch/ppc64/kernel/Makefile8
-rw-r--r--arch/ppc64/kernel/bpa_iic.c270
-rw-r--r--arch/ppc64/kernel/bpa_iic.h62
-rw-r--r--arch/ppc64/kernel/bpa_setup.c6
-rw-r--r--arch/ppc64/kernel/pSeries_smp.c69
-rw-r--r--arch/ppc64/kernel/smp.c4
-rw-r--r--arch/ppc64/kernel/spider-pic.c191
8 files changed, 614 insertions, 11 deletions
diff --git a/arch/ppc64/Kconfig b/arch/ppc64/Kconfig
index c7f2f0a4d856..bae56ec76ea7 100644
--- a/arch/ppc64/Kconfig
+++ b/arch/ppc64/Kconfig
@@ -110,6 +110,21 @@ config PPC_OF
110 bool 110 bool
111 default y 111 default y
112 112
113config XICS
114 depends on PPC_PSERIES
115 bool
116 default y
117
118config MPIC
119 depends on PPC_PSERIES || PPC_PMAC || PPC_MAPLE
120 bool
121 default y
122
123config BPA_IIC
124 depends on PPC_BPA
125 bool
126 default y
127
113# VMX is pSeries only for now until somebody writes the iSeries 128# VMX is pSeries only for now until somebody writes the iSeries
114# exception vectors for it 129# exception vectors for it
115config ALTIVEC 130config ALTIVEC
diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index c89983ab9098..bc58d80ee3d0 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -27,13 +27,13 @@ obj-$(CONFIG_PPC_ISERIES) += HvCall.o HvLpConfig.o LparData.o \
27 mf.o HvLpEvent.o iSeries_proc.o iSeries_htab.o \ 27 mf.o HvLpEvent.o iSeries_proc.o iSeries_htab.o \
28 iSeries_iommu.o 28 iSeries_iommu.o
29 29
30obj-$(CONFIG_PPC_MULTIPLATFORM) += nvram.o i8259.o prom_init.o prom.o mpic.o 30obj-$(CONFIG_PPC_MULTIPLATFORM) += nvram.o i8259.o prom_init.o prom.o
31 31
32obj-$(CONFIG_PPC_PSERIES) += pSeries_pci.o pSeries_lpar.o pSeries_hvCall.o \ 32obj-$(CONFIG_PPC_PSERIES) += pSeries_pci.o pSeries_lpar.o pSeries_hvCall.o \
33 pSeries_nvram.o rtasd.o ras.o pSeries_reconfig.o \ 33 pSeries_nvram.o rtasd.o ras.o pSeries_reconfig.o \
34 xics.o pSeries_setup.o pSeries_iommu.o 34 pSeries_setup.o pSeries_iommu.o
35 35
36obj-$(CONFIG_PPC_BPA) += bpa_setup.o bpa_nvram.o 36obj-$(CONFIG_PPC_BPA) += bpa_setup.o bpa_nvram.o bpa_iic.o spider-pic.o
37 37
38obj-$(CONFIG_EEH) += eeh.o 38obj-$(CONFIG_EEH) += eeh.o
39obj-$(CONFIG_PROC_FS) += proc_ppc64.o 39obj-$(CONFIG_PROC_FS) += proc_ppc64.o
@@ -49,6 +49,8 @@ obj-$(CONFIG_HVC_CONSOLE) += hvconsole.o
49obj-$(CONFIG_BOOTX_TEXT) += btext.o 49obj-$(CONFIG_BOOTX_TEXT) += btext.o
50obj-$(CONFIG_HVCS) += hvcserver.o 50obj-$(CONFIG_HVCS) += hvcserver.o
51obj-$(CONFIG_IBMVIO) += vio.o 51obj-$(CONFIG_IBMVIO) += vio.o
52obj-$(CONFIG_XICS) += xics.o
53obj-$(CONFIG_MPIC) += mpic.o
52 54
53obj-$(CONFIG_PPC_PMAC) += pmac_setup.o pmac_feature.o pmac_pci.o \ 55obj-$(CONFIG_PPC_PMAC) += pmac_setup.o pmac_feature.o pmac_pci.o \
54 pmac_time.o pmac_nvram.o pmac_low_i2c.o 56 pmac_time.o pmac_nvram.o pmac_low_i2c.o
diff --git a/arch/ppc64/kernel/bpa_iic.c b/arch/ppc64/kernel/bpa_iic.c
new file mode 100644
index 000000000000..c8f3dc3fad70
--- /dev/null
+++ b/arch/ppc64/kernel/bpa_iic.c
@@ -0,0 +1,270 @@
1/*
2 * BPA Internal Interrupt Controller
3 *
4 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
5 *
6 * Author: Arnd Bergmann <arndb@de.ibm.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
11 * any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
23#include <linux/config.h>
24#include <linux/interrupt.h>
25#include <linux/irq.h>
26#include <linux/percpu.h>
27#include <linux/types.h>
28
29#include <asm/io.h>
30#include <asm/pgtable.h>
31#include <asm/prom.h>
32#include <asm/ptrace.h>
33
34#include "bpa_iic.h"
35
36struct iic_pending_bits {
37 u32 data;
38 u8 flags;
39 u8 class;
40 u8 source;
41 u8 prio;
42};
43
44enum iic_pending_flags {
45 IIC_VALID = 0x80,
46 IIC_IPI = 0x40,
47};
48
49struct iic_regs {
50 struct iic_pending_bits pending;
51 struct iic_pending_bits pending_destr;
52 u64 generate;
53 u64 prio;
54};
55
56struct iic {
57 struct iic_regs __iomem *regs;
58};
59
60static DEFINE_PER_CPU(struct iic, iic);
61
62void iic_local_enable(void)
63{
64 out_be64(&__get_cpu_var(iic).regs->prio, 0xff);
65}
66
67void iic_local_disable(void)
68{
69 out_be64(&__get_cpu_var(iic).regs->prio, 0x0);
70}
71
72static unsigned int iic_startup(unsigned int irq)
73{
74 return 0;
75}
76
77static void iic_enable(unsigned int irq)
78{
79 iic_local_enable();
80}
81
82static void iic_disable(unsigned int irq)
83{
84}
85
86static void iic_end(unsigned int irq)
87{
88 iic_local_enable();
89}
90
91static struct hw_interrupt_type iic_pic = {
92 .typename = " BPA-IIC ",
93 .startup = iic_startup,
94 .enable = iic_enable,
95 .disable = iic_disable,
96 .end = iic_end,
97};
98
99static int iic_external_get_irq(struct iic_pending_bits pending)
100{
101 int irq;
102 unsigned char node, unit;
103
104 node = pending.source >> 4;
105 unit = pending.source & 0xf;
106 irq = -1;
107
108 /*
109 * This mapping is specific to the Broadband
110 * Engine. We might need to get the numbers
111 * from the device tree to support future CPUs.
112 */
113 switch (unit) {
114 case 0x00:
115 case 0x0b:
116 /*
117 * One of these units can be connected
118 * to an external interrupt controller.
119 */
120 if (pending.prio > 0x3f ||
121 pending.class != 2)
122 break;
123 irq = IIC_EXT_OFFSET
124 + spider_get_irq(pending.prio + node * IIC_NODE_STRIDE)
125 + node * IIC_NODE_STRIDE;
126 break;
127 case 0x01 ... 0x04:
128 case 0x07 ... 0x0a:
129 /*
130 * These units are connected to the SPEs
131 */
132 if (pending.class > 2)
133 break;
134 irq = IIC_SPE_OFFSET
135 + pending.class * IIC_CLASS_STRIDE
136 + node * IIC_NODE_STRIDE
137 + unit;
138 break;
139 }
140 if (irq == -1)
141 printk(KERN_WARNING "Unexpected interrupt class %02x, "
142 "source %02x, prio %02x, cpu %02x\n", pending.class,
143 pending.source, pending.prio, smp_processor_id());
144 return irq;
145}
146
147/* Get an IRQ number from the pending state register of the IIC */
148int iic_get_irq(struct pt_regs *regs)
149{
150 struct iic *iic;
151 int irq;
152 struct iic_pending_bits pending;
153
154 iic = &__get_cpu_var(iic);
155 *(unsigned long *) &pending =
156 in_be64((unsigned long __iomem *) &iic->regs->pending_destr);
157
158 irq = -1;
159 if (pending.flags & IIC_VALID) {
160 if (pending.flags & IIC_IPI) {
161 irq = IIC_IPI_OFFSET + (pending.prio >> 4);
162/*
163 if (irq > 0x80)
164 printk(KERN_WARNING "Unexpected IPI prio %02x"
165 "on CPU %02x\n", pending.prio,
166 smp_processor_id());
167*/
168 } else {
169 irq = iic_external_get_irq(pending);
170 }
171 }
172 return irq;
173}
174
175static struct iic_regs __iomem *find_iic(int cpu)
176{
177 struct device_node *np;
178 int nodeid = cpu / 2;
179 unsigned long regs;
180 struct iic_regs __iomem *iic_regs;
181
182 for (np = of_find_node_by_type(NULL, "cpu");
183 np;
184 np = of_find_node_by_type(np, "cpu")) {
185 if (nodeid == *(int *)get_property(np, "node-id", NULL))
186 break;
187 }
188
189 if (!np) {
190 printk(KERN_WARNING "IIC: CPU %d not found\n", cpu);
191 iic_regs = NULL;
192 } else {
193 regs = *(long *)get_property(np, "iic", NULL);
194
195 /* hack until we have decided on the devtree info */
196 regs += 0x400;
197 if (cpu & 1)
198 regs += 0x20;
199
200 printk(KERN_DEBUG "IIC for CPU %d at %lx\n", cpu, regs);
201 iic_regs = __ioremap(regs, sizeof(struct iic_regs),
202 _PAGE_NO_CACHE);
203 }
204 return iic_regs;
205}
206
207#ifdef CONFIG_SMP
208void iic_setup_cpu(void)
209{
210 out_be64(&__get_cpu_var(iic).regs->prio, 0xff);
211}
212
213void iic_cause_IPI(int cpu, int mesg)
214{
215 out_be64(&per_cpu(iic, cpu).regs->generate, mesg);
216}
217
218static irqreturn_t iic_ipi_action(int irq, void *dev_id, struct pt_regs *regs)
219{
220
221 smp_message_recv(irq - IIC_IPI_OFFSET, regs);
222 return IRQ_HANDLED;
223}
224
225static void iic_request_ipi(int irq, const char *name)
226{
227 /* IPIs are marked SA_INTERRUPT as they must run with irqs
228 * disabled */
229 get_irq_desc(irq)->handler = &iic_pic;
230 get_irq_desc(irq)->status |= IRQ_PER_CPU;
231 request_irq(irq, iic_ipi_action, SA_INTERRUPT, name, NULL);
232}
233
234void iic_request_IPIs(void)
235{
236 iic_request_ipi(IIC_IPI_OFFSET + PPC_MSG_CALL_FUNCTION, "IPI-call");
237 iic_request_ipi(IIC_IPI_OFFSET + PPC_MSG_RESCHEDULE, "IPI-resched");
238#ifdef CONFIG_DEBUGGER
239 iic_request_ipi(IIC_IPI_OFFSET + PPC_MSG_DEBUGGER_BREAK, "IPI-debug");
240#endif /* CONFIG_DEBUGGER */
241}
242#endif /* CONFIG_SMP */
243
244static void iic_setup_spe_handlers(void)
245{
246 int be, isrc;
247
248 /* Assume two threads per BE are present */
249 for (be=0; be < num_present_cpus() / 2; be++) {
250 for (isrc = 0; isrc < IIC_CLASS_STRIDE * 3; isrc++) {
251 int irq = IIC_NODE_STRIDE * be + IIC_SPE_OFFSET + isrc;
252 get_irq_desc(irq)->handler = &iic_pic;
253 }
254 }
255}
256
257void iic_init_IRQ(void)
258{
259 int cpu, irq_offset;
260 struct iic *iic;
261
262 irq_offset = 0;
263 for_each_cpu(cpu) {
264 iic = &per_cpu(iic, cpu);
265 iic->regs = find_iic(cpu);
266 if (iic->regs)
267 out_be64(&iic->regs->prio, 0xff);
268 }
269 iic_setup_spe_handlers();
270}
diff --git a/arch/ppc64/kernel/bpa_iic.h b/arch/ppc64/kernel/bpa_iic.h
new file mode 100644
index 000000000000..6833c3022166
--- /dev/null
+++ b/arch/ppc64/kernel/bpa_iic.h
@@ -0,0 +1,62 @@
1#ifndef ASM_BPA_IIC_H
2#define ASM_BPA_IIC_H
3#ifdef __KERNEL__
4/*
5 * Mapping of IIC pending bits into per-node
6 * interrupt numbers.
7 *
8 * IRQ FF CC SS PP FF CC SS PP Description
9 *
10 * 00-3f 80 02 +0 00 - 80 02 +0 3f South Bridge
11 * 00-3f 80 02 +b 00 - 80 02 +b 3f South Bridge
12 * 41-4a 80 00 +1 ** - 80 00 +a ** SPU Class 0
13 * 51-5a 80 01 +1 ** - 80 01 +a ** SPU Class 1
14 * 61-6a 80 02 +1 ** - 80 02 +a ** SPU Class 2
15 * 70-7f C0 ** ** 00 - C0 ** ** 0f IPI
16 *
17 * F flags
18 * C class
19 * S source
20 * P Priority
21 * + node number
22 * * don't care
23 *
24 * A node consists of a Broadband Engine and an optional
25 * south bridge device providing a maximum of 64 IRQs.
26 * The south bridge may be connected to either IOIF0
27 * or IOIF1.
28 * Each SPE is represented as three IRQ lines, one per
29 * interrupt class.
30 * 16 IRQ numbers are reserved for inter processor
31 * interruptions, although these are only used in the
32 * range of the first node.
33 *
34 * This scheme needs 128 IRQ numbers per BIF node ID,
35 * which means that with the total of 512 lines
36 * available, we can have a maximum of four nodes.
37 */
38
39enum {
40 IIC_EXT_OFFSET = 0x00, /* Start of south bridge IRQs */
41 IIC_NUM_EXT = 0x40, /* Number of south bridge IRQs */
42 IIC_SPE_OFFSET = 0x40, /* Start of SPE interrupts */
43 IIC_CLASS_STRIDE = 0x10, /* SPE IRQs per class */
44 IIC_IPI_OFFSET = 0x70, /* Start of IPI IRQs */
45 IIC_NUM_IPIS = 0x10, /* IRQs reserved for IPI */
46 IIC_NODE_STRIDE = 0x80, /* Total IRQs per node */
47};
48
49extern void iic_init_IRQ(void);
50extern int iic_get_irq(struct pt_regs *regs);
51extern void iic_cause_IPI(int cpu, int mesg);
52extern void iic_request_IPIs(void);
53extern void iic_setup_cpu(void);
54extern void iic_local_enable(void);
55extern void iic_local_disable(void);
56
57
58extern void spider_init_IRQ(void);
59extern int spider_get_irq(unsigned long int_pending);
60
61#endif
62#endif /* ASM_BPA_IIC_H */
diff --git a/arch/ppc64/kernel/bpa_setup.c b/arch/ppc64/kernel/bpa_setup.c
index d1992dd2d61b..0a43d8a93d76 100644
--- a/arch/ppc64/kernel/bpa_setup.c
+++ b/arch/ppc64/kernel/bpa_setup.c
@@ -45,6 +45,7 @@
45#include <asm/cputable.h> 45#include <asm/cputable.h>
46 46
47#include "pci.h" 47#include "pci.h"
48#include "bpa_iic.h"
48 49
49#ifdef DEBUG 50#ifdef DEBUG
50#define DBG(fmt...) udbg_printf(fmt) 51#define DBG(fmt...) udbg_printf(fmt)
@@ -71,6 +72,9 @@ static void bpa_progress(char *s, unsigned short hex)
71 72
72static void __init bpa_setup_arch(void) 73static void __init bpa_setup_arch(void)
73{ 74{
75 ppc_md.init_IRQ = iic_init_IRQ;
76 ppc_md.get_irq = iic_get_irq;
77
74#ifdef CONFIG_SMP 78#ifdef CONFIG_SMP
75 smp_init_pSeries(); 79 smp_init_pSeries();
76#endif 80#endif
@@ -86,7 +90,7 @@ static void __init bpa_setup_arch(void)
86 /* Find and initialize PCI host bridges */ 90 /* Find and initialize PCI host bridges */
87 init_pci_config_tokens(); 91 init_pci_config_tokens();
88 find_and_init_phbs(); 92 find_and_init_phbs();
89 93 spider_init_IRQ();
90#ifdef CONFIG_DUMMY_CONSOLE 94#ifdef CONFIG_DUMMY_CONSOLE
91 conswitchp = &dummy_con; 95 conswitchp = &dummy_con;
92#endif 96#endif
diff --git a/arch/ppc64/kernel/pSeries_smp.c b/arch/ppc64/kernel/pSeries_smp.c
index 4203bd020c82..30154140f7e2 100644
--- a/arch/ppc64/kernel/pSeries_smp.c
+++ b/arch/ppc64/kernel/pSeries_smp.c
@@ -1,5 +1,5 @@
1/* 1/*
2 * SMP support for pSeries machines. 2 * SMP support for pSeries and BPA machines.
3 * 3 *
4 * Dave Engebretsen, Peter Bergner, and 4 * Dave Engebretsen, Peter Bergner, and
5 * Mike Corrigan {engebret|bergner|mikec}@us.ibm.com 5 * Mike Corrigan {engebret|bergner|mikec}@us.ibm.com
@@ -47,6 +47,7 @@
47#include <asm/pSeries_reconfig.h> 47#include <asm/pSeries_reconfig.h>
48 48
49#include "mpic.h" 49#include "mpic.h"
50#include "bpa_iic.h"
50 51
51#ifdef DEBUG 52#ifdef DEBUG
52#define DBG(fmt...) udbg_printf(fmt) 53#define DBG(fmt...) udbg_printf(fmt)
@@ -286,6 +287,7 @@ static inline int __devinit smp_startup_cpu(unsigned int lcpu)
286 return 1; 287 return 1;
287} 288}
288 289
290#ifdef CONFIG_XICS
289static inline void smp_xics_do_message(int cpu, int msg) 291static inline void smp_xics_do_message(int cpu, int msg)
290{ 292{
291 set_bit(msg, &xics_ipi_message[cpu].value); 293 set_bit(msg, &xics_ipi_message[cpu].value);
@@ -327,6 +329,37 @@ static void __devinit smp_xics_setup_cpu(int cpu)
327 cpu_clear(cpu, of_spin_map); 329 cpu_clear(cpu, of_spin_map);
328 330
329} 331}
332#endif /* CONFIG_XICS */
333#ifdef CONFIG_BPA_IIC
334static void smp_iic_message_pass(int target, int msg)
335{
336 unsigned int i;
337
338 if (target < NR_CPUS) {
339 iic_cause_IPI(target, msg);
340 } else {
341 for_each_online_cpu(i) {
342 if (target == MSG_ALL_BUT_SELF
343 && i == smp_processor_id())
344 continue;
345 iic_cause_IPI(i, msg);
346 }
347 }
348}
349
350static int __init smp_iic_probe(void)
351{
352 iic_request_IPIs();
353
354 return cpus_weight(cpu_possible_map);
355}
356
357static void __devinit smp_iic_setup_cpu(int cpu)
358{
359 if (cpu != boot_cpuid)
360 iic_setup_cpu();
361}
362#endif /* CONFIG_BPA_IIC */
330 363
331static DEFINE_SPINLOCK(timebase_lock); 364static DEFINE_SPINLOCK(timebase_lock);
332static unsigned long timebase = 0; 365static unsigned long timebase = 0;
@@ -381,14 +414,15 @@ static int smp_pSeries_cpu_bootable(unsigned int nr)
381 414
382 return 1; 415 return 1;
383} 416}
384 417#ifdef CONFIG_MPIC
385static struct smp_ops_t pSeries_mpic_smp_ops = { 418static struct smp_ops_t pSeries_mpic_smp_ops = {
386 .message_pass = smp_mpic_message_pass, 419 .message_pass = smp_mpic_message_pass,
387 .probe = smp_mpic_probe, 420 .probe = smp_mpic_probe,
388 .kick_cpu = smp_pSeries_kick_cpu, 421 .kick_cpu = smp_pSeries_kick_cpu,
389 .setup_cpu = smp_mpic_setup_cpu, 422 .setup_cpu = smp_mpic_setup_cpu,
390}; 423};
391 424#endif
425#ifdef CONFIG_XICS
392static struct smp_ops_t pSeries_xics_smp_ops = { 426static struct smp_ops_t pSeries_xics_smp_ops = {
393 .message_pass = smp_xics_message_pass, 427 .message_pass = smp_xics_message_pass,
394 .probe = smp_xics_probe, 428 .probe = smp_xics_probe,
@@ -396,6 +430,16 @@ static struct smp_ops_t pSeries_xics_smp_ops = {
396 .setup_cpu = smp_xics_setup_cpu, 430 .setup_cpu = smp_xics_setup_cpu,
397 .cpu_bootable = smp_pSeries_cpu_bootable, 431 .cpu_bootable = smp_pSeries_cpu_bootable,
398}; 432};
433#endif
434#ifdef CONFIG_BPA_IIC
435static struct smp_ops_t bpa_iic_smp_ops = {
436 .message_pass = smp_iic_message_pass,
437 .probe = smp_iic_probe,
438 .kick_cpu = smp_pSeries_kick_cpu,
439 .setup_cpu = smp_iic_setup_cpu,
440 .cpu_bootable = smp_pSeries_cpu_bootable,
441};
442#endif
399 443
400/* This is called very early */ 444/* This is called very early */
401void __init smp_init_pSeries(void) 445void __init smp_init_pSeries(void)
@@ -404,10 +448,25 @@ void __init smp_init_pSeries(void)
404 448
405 DBG(" -> smp_init_pSeries()\n"); 449 DBG(" -> smp_init_pSeries()\n");
406 450
407 if (ppc64_interrupt_controller == IC_OPEN_PIC) 451 switch (ppc64_interrupt_controller) {
452#ifdef CONFIG_MPIC
453 case IC_OPEN_PIC:
408 smp_ops = &pSeries_mpic_smp_ops; 454 smp_ops = &pSeries_mpic_smp_ops;
409 else 455 break;
456#endif
457#ifdef CONFIG_XICS
458 case IC_PPC_XIC:
410 smp_ops = &pSeries_xics_smp_ops; 459 smp_ops = &pSeries_xics_smp_ops;
460 break;
461#endif
462#ifdef CONFIG_BPA_IIC
463 case IC_BPA_IIC:
464 smp_ops = &bpa_iic_smp_ops;
465 break;
466#endif
467 default:
468 panic("Invalid interrupt controller");
469 }
411 470
412#ifdef CONFIG_HOTPLUG_CPU 471#ifdef CONFIG_HOTPLUG_CPU
413 smp_ops->cpu_disable = pSeries_cpu_disable; 472 smp_ops->cpu_disable = pSeries_cpu_disable;
diff --git a/arch/ppc64/kernel/smp.c b/arch/ppc64/kernel/smp.c
index 9ef5d36d6b25..2fcddfcb594d 100644
--- a/arch/ppc64/kernel/smp.c
+++ b/arch/ppc64/kernel/smp.c
@@ -71,7 +71,7 @@ void smp_call_function_interrupt(void);
71 71
72int smt_enabled_at_boot = 1; 72int smt_enabled_at_boot = 1;
73 73
74#ifdef CONFIG_PPC_MULTIPLATFORM 74#ifdef CONFIG_MPIC
75void smp_mpic_message_pass(int target, int msg) 75void smp_mpic_message_pass(int target, int msg)
76{ 76{
77 /* make sure we're sending something that translates to an IPI */ 77 /* make sure we're sending something that translates to an IPI */
@@ -128,7 +128,7 @@ void __devinit smp_generic_kick_cpu(int nr)
128 smp_mb(); 128 smp_mb();
129} 129}
130 130
131#endif /* CONFIG_PPC_MULTIPLATFORM */ 131#endif /* CONFIG_MPIC */
132 132
133static void __init smp_space_timers(unsigned int max_cpus) 133static void __init smp_space_timers(unsigned int max_cpus)
134{ 134{
diff --git a/arch/ppc64/kernel/spider-pic.c b/arch/ppc64/kernel/spider-pic.c
new file mode 100644
index 000000000000..d5c9a02fb119
--- /dev/null
+++ b/arch/ppc64/kernel/spider-pic.c
@@ -0,0 +1,191 @@
1/*
2 * External Interrupt Controller on Spider South Bridge
3 *
4 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
5 *
6 * Author: Arnd Bergmann <arndb@de.ibm.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
11 * any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
23#include <linux/interrupt.h>
24#include <linux/irq.h>
25
26#include <asm/pgtable.h>
27#include <asm/prom.h>
28#include <asm/io.h>
29
30#include "bpa_iic.h"
31
32/* register layout taken from Spider spec, table 7.4-4 */
33enum {
34 TIR_DEN = 0x004, /* Detection Enable Register */
35 TIR_MSK = 0x084, /* Mask Level Register */
36 TIR_EDC = 0x0c0, /* Edge Detection Clear Register */
37 TIR_PNDA = 0x100, /* Pending Register A */
38 TIR_PNDB = 0x104, /* Pending Register B */
39 TIR_CS = 0x144, /* Current Status Register */
40 TIR_LCSA = 0x150, /* Level Current Status Register A */
41 TIR_LCSB = 0x154, /* Level Current Status Register B */
42 TIR_LCSC = 0x158, /* Level Current Status Register C */
43 TIR_LCSD = 0x15c, /* Level Current Status Register D */
44 TIR_CFGA = 0x200, /* Setting Register A0 */
45 TIR_CFGB = 0x204, /* Setting Register B0 */
46 /* 0x208 ... 0x3ff Setting Register An/Bn */
47 TIR_PPNDA = 0x400, /* Packet Pending Register A */
48 TIR_PPNDB = 0x404, /* Packet Pending Register B */
49 TIR_PIERA = 0x408, /* Packet Output Error Register A */
50 TIR_PIERB = 0x40c, /* Packet Output Error Register B */
51 TIR_PIEN = 0x444, /* Packet Output Enable Register */
52 TIR_PIPND = 0x454, /* Packet Output Pending Register */
53 TIRDID = 0x484, /* Spider Device ID Register */
54 REISTIM = 0x500, /* Reissue Command Timeout Time Setting */
55 REISTIMEN = 0x504, /* Reissue Command Timeout Setting */
56 REISWAITEN = 0x508, /* Reissue Wait Control*/
57};
58
59static void __iomem *spider_pics[4];
60
61static void __iomem *spider_get_pic(int irq)
62{
63 int node = irq / IIC_NODE_STRIDE;
64 irq %= IIC_NODE_STRIDE;
65
66 if (irq >= IIC_EXT_OFFSET &&
67 irq < IIC_EXT_OFFSET + IIC_NUM_EXT &&
68 spider_pics)
69 return spider_pics[node];
70 return NULL;
71}
72
73static int spider_get_nr(unsigned int irq)
74{
75 return (irq % IIC_NODE_STRIDE) - IIC_EXT_OFFSET;
76}
77
78static void __iomem *spider_get_irq_config(int irq)
79{
80 void __iomem *pic;
81 pic = spider_get_pic(irq);
82 return pic + TIR_CFGA + 8 * spider_get_nr(irq);
83}
84
85static void spider_enable_irq(unsigned int irq)
86{
87 void __iomem *cfg = spider_get_irq_config(irq);
88 irq = spider_get_nr(irq);
89
90 out_be32(cfg, in_be32(cfg) | 0x3107000eu);
91 out_be32(cfg + 4, in_be32(cfg + 4) | 0x00020000u | irq);
92}
93
94static void spider_disable_irq(unsigned int irq)
95{
96 void __iomem *cfg = spider_get_irq_config(irq);
97 irq = spider_get_nr(irq);
98
99 out_be32(cfg, in_be32(cfg) & ~0x30000000u);
100}
101
102static unsigned int spider_startup_irq(unsigned int irq)
103{
104 spider_enable_irq(irq);
105 return 0;
106}
107
108static void spider_shutdown_irq(unsigned int irq)
109{
110 spider_disable_irq(irq);
111}
112
113static void spider_end_irq(unsigned int irq)
114{
115 spider_enable_irq(irq);
116}
117
118static void spider_ack_irq(unsigned int irq)
119{
120 spider_disable_irq(irq);
121 iic_local_enable();
122}
123
124static struct hw_interrupt_type spider_pic = {
125 .typename = " SPIDER ",
126 .startup = spider_startup_irq,
127 .shutdown = spider_shutdown_irq,
128 .enable = spider_enable_irq,
129 .disable = spider_disable_irq,
130 .ack = spider_ack_irq,
131 .end = spider_end_irq,
132};
133
134
135int spider_get_irq(unsigned long int_pending)
136{
137 void __iomem *regs = spider_get_pic(int_pending);
138 unsigned long cs;
139 int irq;
140
141 cs = in_be32(regs + TIR_CS);
142
143 irq = cs >> 24;
144 if (irq != 63)
145 return irq;
146
147 return -1;
148}
149
150void spider_init_IRQ(void)
151{
152 int node;
153 struct device_node *dn;
154 unsigned int *property;
155 long spiderpic;
156 int n;
157
158/* FIXME: detect multiple PICs as soon as the device tree has them */
159 for (node = 0; node < 1; node++) {
160 dn = of_find_node_by_path("/");
161 n = prom_n_addr_cells(dn);
162 property = (unsigned int *) get_property(dn,
163 "platform-spider-pic", NULL);
164
165 if (!property)
166 continue;
167 for (spiderpic = 0; n > 0; --n)
168 spiderpic = (spiderpic << 32) + *property++;
169 printk(KERN_DEBUG "SPIDER addr: %lx\n", spiderpic);
170 spider_pics[node] = __ioremap(spiderpic, 0x800, _PAGE_NO_CACHE);
171 for (n = 0; n < IIC_NUM_EXT; n++) {
172 int irq = n + IIC_EXT_OFFSET + node * IIC_NODE_STRIDE;
173 get_irq_desc(irq)->handler = &spider_pic;
174
175 /* do not mask any interrupts because of level */
176 out_be32(spider_pics[node] + TIR_MSK, 0x0);
177
178 /* disable edge detection clear */
179 /* out_be32(spider_pics[node] + TIR_EDC, 0x0); */
180
181 /* enable interrupt packets to be output */
182 out_be32(spider_pics[node] + TIR_PIEN,
183 in_be32(spider_pics[node] + TIR_PIEN) | 0x1);
184
185 /* Enable the interrupt detection enable bit. Do this last! */
186 out_be32(spider_pics[node] + TIR_DEN,
187 in_be32(spider_pics[node] +TIR_DEN) | 0x1);
188
189 }
190 }
191}
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-17 00:52:55 -0500