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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/ppc/platforms/prep_setup.c
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/ppc/platforms/prep_setup.c')
-rw-r--r--arch/ppc/platforms/prep_setup.c1181
1 files changed, 1181 insertions, 0 deletions
diff --git a/arch/ppc/platforms/prep_setup.c b/arch/ppc/platforms/prep_setup.c
new file mode 100644
index 00000000000..bc926be9547
--- /dev/null
+++ b/arch/ppc/platforms/prep_setup.c
@@ -0,0 +1,1181 @@
1/*
2 * arch/ppc/platforms/setup.c
3 *
4 * Copyright (C) 1995 Linus Torvalds
5 * Adapted from 'alpha' version by Gary Thomas
6 * Modified by Cort Dougan (cort@cs.nmt.edu)
7 *
8 * Support for PReP (Motorola MTX/MVME)
9 * by Troy Benjegerdes (hozer@drgw.net)
10 */
11
12/*
13 * bootup setup stuff..
14 */
15
16#include <linux/config.h>
17#include <linux/delay.h>
18#include <linux/module.h>
19#include <linux/errno.h>
20#include <linux/sched.h>
21#include <linux/kernel.h>
22#include <linux/mm.h>
23#include <linux/stddef.h>
24#include <linux/unistd.h>
25#include <linux/ptrace.h>
26#include <linux/slab.h>
27#include <linux/user.h>
28#include <linux/a.out.h>
29#include <linux/tty.h>
30#include <linux/major.h>
31#include <linux/interrupt.h>
32#include <linux/reboot.h>
33#include <linux/init.h>
34#include <linux/initrd.h>
35#include <linux/ioport.h>
36#include <linux/console.h>
37#include <linux/timex.h>
38#include <linux/pci.h>
39#include <linux/ide.h>
40#include <linux/seq_file.h>
41#include <linux/root_dev.h>
42
43#include <asm/sections.h>
44#include <asm/mmu.h>
45#include <asm/processor.h>
46#include <asm/residual.h>
47#include <asm/io.h>
48#include <asm/pgtable.h>
49#include <asm/cache.h>
50#include <asm/dma.h>
51#include <asm/machdep.h>
52#include <asm/mc146818rtc.h>
53#include <asm/mk48t59.h>
54#include <asm/prep_nvram.h>
55#include <asm/raven.h>
56#include <asm/vga.h>
57#include <asm/time.h>
58#include <asm/mpc10x.h>
59#include <asm/i8259.h>
60#include <asm/open_pic.h>
61#include <asm/pci-bridge.h>
62#include <asm/todc.h>
63
64TODC_ALLOC();
65
66unsigned char ucSystemType;
67unsigned char ucBoardRev;
68unsigned char ucBoardRevMaj, ucBoardRevMin;
69
70extern unsigned char prep_nvram_read_val(int addr);
71extern void prep_nvram_write_val(int addr,
72 unsigned char val);
73extern unsigned char rs_nvram_read_val(int addr);
74extern void rs_nvram_write_val(int addr,
75 unsigned char val);
76extern void ibm_prep_init(void);
77
78extern void prep_find_bridges(void);
79
80int _prep_type;
81
82extern void prep_residual_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
83extern void prep_sandalfoot_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
84extern void prep_thinkpad_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
85extern void prep_carolina_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
86extern void prep_tiger1_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
87
88
89#define cached_21 (((char *)(ppc_cached_irq_mask))[3])
90#define cached_A1 (((char *)(ppc_cached_irq_mask))[2])
91
92/* for the mac fs */
93dev_t boot_dev;
94
95#ifdef CONFIG_SOUND_CS4232
96long ppc_cs4232_dma, ppc_cs4232_dma2;
97#endif
98
99extern PTE *Hash, *Hash_end;
100extern unsigned long Hash_size, Hash_mask;
101extern int probingmem;
102extern unsigned long loops_per_jiffy;
103
104#ifdef CONFIG_SOUND_CS4232
105EXPORT_SYMBOL(ppc_cs4232_dma);
106EXPORT_SYMBOL(ppc_cs4232_dma2);
107#endif
108
109/* useful ISA ports */
110#define PREP_SYSCTL 0x81c
111/* present in the IBM reference design; possibly identical in Mot boxes: */
112#define PREP_IBM_SIMM_ID 0x803 /* SIMM size: 32 or 8 MiB */
113#define PREP_IBM_SIMM_PRESENCE 0x804
114#define PREP_IBM_EQUIPMENT 0x80c
115#define PREP_IBM_L2INFO 0x80d
116#define PREP_IBM_PM1 0x82a /* power management register 1 */
117#define PREP_IBM_PLANAR 0x852 /* planar ID - identifies the motherboard */
118#define PREP_IBM_DISP 0x8c0 /* 4-digit LED display */
119
120/* Equipment Present Register masks: */
121#define PREP_IBM_EQUIPMENT_RESERVED 0x80
122#define PREP_IBM_EQUIPMENT_SCSIFUSE 0x40
123#define PREP_IBM_EQUIPMENT_L2_COPYBACK 0x08
124#define PREP_IBM_EQUIPMENT_L2_256 0x04
125#define PREP_IBM_EQUIPMENT_CPU 0x02
126#define PREP_IBM_EQUIPMENT_L2 0x01
127
128/* planar ID values: */
129/* Sandalfoot/Sandalbow (6015/7020) */
130#define PREP_IBM_SANDALFOOT 0xfc
131/* Woodfield, Thinkpad 850/860 (6042/7249) */
132#define PREP_IBM_THINKPAD 0xff /* planar ID unimplemented */
133/* PowerSeries 830/850 (6050/6070) */
134#define PREP_IBM_CAROLINA_IDE_0 0xf0
135#define PREP_IBM_CAROLINA_IDE_1 0xf1
136#define PREP_IBM_CAROLINA_IDE_2 0xf2
137#define PREP_IBM_CAROLINA_IDE_3 0xf3
138/* 7248-43P */
139#define PREP_IBM_CAROLINA_SCSI_0 0xf4
140#define PREP_IBM_CAROLINA_SCSI_1 0xf5
141#define PREP_IBM_CAROLINA_SCSI_2 0xf6
142#define PREP_IBM_CAROLINA_SCSI_3 0xf7 /* missing from Carolina Tech Spec */
143/* Tiger1 (7043-140) */
144#define PREP_IBM_TIGER1_133 0xd1
145#define PREP_IBM_TIGER1_166 0xd2
146#define PREP_IBM_TIGER1_180 0xd3
147#define PREP_IBM_TIGER1_xxx 0xd4 /* unknown, but probably exists */
148#define PREP_IBM_TIGER1_333 0xd5 /* missing from Tiger Tech Spec */
149
150/* setup_ibm_pci:
151 * set Motherboard_map_name, Motherboard_map, Motherboard_routes.
152 * return 8259 edge/level masks.
153 */
154void (*setup_ibm_pci)(char *irq_lo, char *irq_hi);
155
156extern char *Motherboard_map_name; /* for use in *_cpuinfo */
157
158/*
159 * As found in the PReP reference implementation.
160 * Used by Thinkpad, Sandalfoot (6015/7020), and all Motorola PReP.
161 */
162static void __init
163prep_gen_enable_l2(void)
164{
165 outb(inb(PREP_SYSCTL) | 0x3, PREP_SYSCTL);
166}
167
168/* Used by Carolina and Tiger1 */
169static void __init
170prep_carolina_enable_l2(void)
171{
172 outb(inb(PREP_SYSCTL) | 0xc0, PREP_SYSCTL);
173}
174
175/* cpuinfo code common to all IBM PReP */
176static void __prep
177prep_ibm_cpuinfo(struct seq_file *m)
178{
179 unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
180
181 seq_printf(m, "machine\t\t: PReP %s\n", Motherboard_map_name);
182
183 seq_printf(m, "upgrade cpu\t: ");
184 if (equip_reg & PREP_IBM_EQUIPMENT_CPU) {
185 seq_printf(m, "not ");
186 }
187 seq_printf(m, "present\n");
188
189 /* print info about the SCSI fuse */
190 seq_printf(m, "scsi fuse\t: ");
191 if (equip_reg & PREP_IBM_EQUIPMENT_SCSIFUSE)
192 seq_printf(m, "ok");
193 else
194 seq_printf(m, "bad");
195 seq_printf(m, "\n");
196
197 /* print info about SIMMs */
198 if (have_residual_data) {
199 int i;
200 seq_printf(m, "simms\t\t: ");
201 for (i = 0; (res->ActualNumMemories) && (i < MAX_MEMS); i++) {
202 if (res->Memories[i].SIMMSize != 0)
203 seq_printf(m, "%d:%ldMiB ", i,
204 (res->Memories[i].SIMMSize > 1024) ?
205 res->Memories[i].SIMMSize>>20 :
206 res->Memories[i].SIMMSize);
207 }
208 seq_printf(m, "\n");
209 }
210}
211
212static int __prep
213prep_gen_cpuinfo(struct seq_file *m)
214{
215 prep_ibm_cpuinfo(m);
216 return 0;
217}
218
219static int __prep
220prep_sandalfoot_cpuinfo(struct seq_file *m)
221{
222 unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
223
224 prep_ibm_cpuinfo(m);
225
226 /* report amount and type of L2 cache present */
227 seq_printf(m, "L2 cache\t: ");
228 if (equip_reg & PREP_IBM_EQUIPMENT_L2) {
229 seq_printf(m, "not present");
230 } else {
231 if (equip_reg & PREP_IBM_EQUIPMENT_L2_256)
232 seq_printf(m, "256KiB");
233 else
234 seq_printf(m, "unknown size");
235
236 if (equip_reg & PREP_IBM_EQUIPMENT_L2_COPYBACK)
237 seq_printf(m, ", copy-back");
238 else
239 seq_printf(m, ", write-through");
240 }
241 seq_printf(m, "\n");
242
243 return 0;
244}
245
246static int __prep
247prep_thinkpad_cpuinfo(struct seq_file *m)
248{
249 unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
250 char *cpubus_speed, *pci_speed;
251
252 prep_ibm_cpuinfo(m);
253
254 /* report amount and type of L2 cache present */
255 seq_printf(m, "l2 cache\t: ");
256 if ((equip_reg & 0x1) == 0) {
257 switch ((equip_reg & 0xc) >> 2) {
258 case 0x0:
259 seq_printf(m, "128KiB look-aside 2-way write-through\n");
260 break;
261 case 0x1:
262 seq_printf(m, "512KiB look-aside direct-mapped write-back\n");
263 break;
264 case 0x2:
265 seq_printf(m, "256KiB look-aside 2-way write-through\n");
266 break;
267 case 0x3:
268 seq_printf(m, "256KiB look-aside direct-mapped write-back\n");
269 break;
270 }
271 } else {
272 seq_printf(m, "not present\n");
273 }
274
275 /* report bus speeds because we can */
276 if ((equip_reg & 0x80) == 0) {
277 switch ((equip_reg & 0x30) >> 4) {
278 case 0x1:
279 cpubus_speed = "50";
280 pci_speed = "25";
281 break;
282 case 0x3:
283 cpubus_speed = "66";
284 pci_speed = "33";
285 break;
286 default:
287 cpubus_speed = "unknown";
288 pci_speed = "unknown";
289 break;
290 }
291 } else {
292 switch ((equip_reg & 0x30) >> 4) {
293 case 0x1:
294 cpubus_speed = "25";
295 pci_speed = "25";
296 break;
297 case 0x2:
298 cpubus_speed = "60";
299 pci_speed = "30";
300 break;
301 case 0x3:
302 cpubus_speed = "33";
303 pci_speed = "33";
304 break;
305 default:
306 cpubus_speed = "unknown";
307 pci_speed = "unknown";
308 break;
309 }
310 }
311 seq_printf(m, "60x bus\t\t: %sMHz\n", cpubus_speed);
312 seq_printf(m, "pci bus\t\t: %sMHz\n", pci_speed);
313
314 return 0;
315}
316
317static int __prep
318prep_carolina_cpuinfo(struct seq_file *m)
319{
320 unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
321
322 prep_ibm_cpuinfo(m);
323
324 /* report amount and type of L2 cache present */
325 seq_printf(m, "l2 cache\t: ");
326 if ((equip_reg & 0x1) == 0) {
327 unsigned int l2_reg = inb(PREP_IBM_L2INFO);
328
329 /* L2 size */
330 if ((l2_reg & 0x60) == 0)
331 seq_printf(m, "256KiB");
332 else if ((l2_reg & 0x60) == 0x20)
333 seq_printf(m, "512KiB");
334 else
335 seq_printf(m, "unknown size");
336
337 /* L2 type */
338 if ((l2_reg & 0x3) == 0)
339 seq_printf(m, ", async");
340 else if ((l2_reg & 0x3) == 1)
341 seq_printf(m, ", sync");
342 else
343 seq_printf(m, ", unknown type");
344
345 seq_printf(m, "\n");
346 } else {
347 seq_printf(m, "not present\n");
348 }
349
350 return 0;
351}
352
353static int __prep
354prep_tiger1_cpuinfo(struct seq_file *m)
355{
356 unsigned int l2_reg = inb(PREP_IBM_L2INFO);
357
358 prep_ibm_cpuinfo(m);
359
360 /* report amount and type of L2 cache present */
361 seq_printf(m, "l2 cache\t: ");
362 if ((l2_reg & 0xf) == 0xf) {
363 seq_printf(m, "not present\n");
364 } else {
365 if (l2_reg & 0x8)
366 seq_printf(m, "async, ");
367 else
368 seq_printf(m, "sync burst, ");
369
370 if (l2_reg & 0x4)
371 seq_printf(m, "parity, ");
372 else
373 seq_printf(m, "no parity, ");
374
375 switch (l2_reg & 0x3) {
376 case 0x0:
377 seq_printf(m, "256KiB\n");
378 break;
379 case 0x1:
380 seq_printf(m, "512KiB\n");
381 break;
382 case 0x2:
383 seq_printf(m, "1MiB\n");
384 break;
385 default:
386 seq_printf(m, "unknown size\n");
387 break;
388 }
389 }
390
391 return 0;
392}
393
394
395/* Used by all Motorola PReP */
396static int __prep
397prep_mot_cpuinfo(struct seq_file *m)
398{
399 unsigned int cachew = *((unsigned char *)CACHECRBA);
400
401 seq_printf(m, "machine\t\t: PReP %s\n", Motherboard_map_name);
402
403 /* report amount and type of L2 cache present */
404 seq_printf(m, "l2 cache\t: ");
405 switch (cachew & L2CACHE_MASK) {
406 case L2CACHE_512KB:
407 seq_printf(m, "512KiB");
408 break;
409 case L2CACHE_256KB:
410 seq_printf(m, "256KiB");
411 break;
412 case L2CACHE_1MB:
413 seq_printf(m, "1MiB");
414 break;
415 case L2CACHE_NONE:
416 seq_printf(m, "none\n");
417 goto no_l2;
418 break;
419 default:
420 seq_printf(m, "%x\n", cachew);
421 }
422
423 seq_printf(m, ", parity %s",
424 (cachew & L2CACHE_PARITY)? "enabled" : "disabled");
425
426 seq_printf(m, " SRAM:");
427
428 switch ( ((cachew & 0xf0) >> 4) & ~(0x3) ) {
429 case 1: seq_printf(m, "synchronous, parity, flow-through\n");
430 break;
431 case 2: seq_printf(m, "asynchronous, no parity\n");
432 break;
433 case 3: seq_printf(m, "asynchronous, parity\n");
434 break;
435 default:seq_printf(m, "synchronous, pipelined, no parity\n");
436 break;
437 }
438
439no_l2:
440 /* print info about SIMMs */
441 if (have_residual_data) {
442 int i;
443 seq_printf(m, "simms\t\t: ");
444 for (i = 0; (res->ActualNumMemories) && (i < MAX_MEMS); i++) {
445 if (res->Memories[i].SIMMSize != 0)
446 seq_printf(m, "%d:%ldM ", i,
447 (res->Memories[i].SIMMSize > 1024) ?
448 res->Memories[i].SIMMSize>>20 :
449 res->Memories[i].SIMMSize);
450 }
451 seq_printf(m, "\n");
452 }
453
454 return 0;
455}
456
457static void __prep
458prep_restart(char *cmd)
459{
460#define PREP_SP92 0x92 /* Special Port 92 */
461 local_irq_disable(); /* no interrupts */
462
463 /* set exception prefix high - to the prom */
464 _nmask_and_or_msr(0, MSR_IP);
465
466 /* make sure bit 0 (reset) is a 0 */
467 outb( inb(PREP_SP92) & ~1L , PREP_SP92);
468 /* signal a reset to system control port A - soft reset */
469 outb( inb(PREP_SP92) | 1 , PREP_SP92);
470
471 while ( 1 ) ;
472 /* not reached */
473#undef PREP_SP92
474}
475
476static void __prep
477prep_halt(void)
478{
479 local_irq_disable(); /* no interrupts */
480
481 /* set exception prefix high - to the prom */
482 _nmask_and_or_msr(0, MSR_IP);
483
484 while ( 1 ) ;
485 /* not reached */
486}
487
488/* Carrera is the power manager in the Thinkpads. Unfortunately not much is
489 * known about it, so we can't power down.
490 */
491static void __prep
492prep_carrera_poweroff(void)
493{
494 prep_halt();
495}
496
497/*
498 * On most IBM PReP's, power management is handled by a Signetics 87c750
499 * behind the Utah component on the ISA bus. To access the 750 you must write
500 * a series of nibbles to port 0x82a (decoded by the Utah). This is described
501 * somewhat in the IBM Carolina Technical Specification.
502 * -Hollis
503 */
504static void __prep
505utah_sig87c750_setbit(unsigned int bytenum, unsigned int bitnum, int value)
506{
507 /*
508 * byte1: 0 0 0 1 0 d a5 a4
509 * byte2: 0 0 0 1 a3 a2 a1 a0
510 *
511 * d = the bit's value, enabled or disabled
512 * (a5 a4 a3) = the byte number, minus 20
513 * (a2 a1 a0) = the bit number
514 *
515 * example: set the 5th bit of byte 21 (21.5)
516 * a5 a4 a3 = 001 (byte 1)
517 * a2 a1 a0 = 101 (bit 5)
518 *
519 * byte1 = 0001 0100 (0x14)
520 * byte2 = 0001 1101 (0x1d)
521 */
522 unsigned char byte1=0x10, byte2=0x10;
523
524 /* the 750's '20.0' is accessed as '0.0' through Utah (which adds 20) */
525 bytenum -= 20;
526
527 byte1 |= (!!value) << 2; /* set d */
528 byte1 |= (bytenum >> 1) & 0x3; /* set a5, a4 */
529
530 byte2 |= (bytenum & 0x1) << 3; /* set a3 */
531 byte2 |= bitnum & 0x7; /* set a2, a1, a0 */
532
533 outb(byte1, PREP_IBM_PM1); /* first nibble */
534 mb();
535 udelay(100); /* important: let controller recover */
536
537 outb(byte2, PREP_IBM_PM1); /* second nibble */
538 mb();
539 udelay(100); /* important: let controller recover */
540}
541
542static void __prep
543prep_sig750_poweroff(void)
544{
545 /* tweak the power manager found in most IBM PRePs (except Thinkpads) */
546
547 local_irq_disable();
548 /* set exception prefix high - to the prom */
549 _nmask_and_or_msr(0, MSR_IP);
550
551 utah_sig87c750_setbit(21, 5, 1); /* set bit 21.5, "PMEXEC_OFF" */
552
553 while (1) ;
554 /* not reached */
555}
556
557static int __prep
558prep_show_percpuinfo(struct seq_file *m, int i)
559{
560 /* PREP's without residual data will give incorrect values here */
561 seq_printf(m, "clock\t\t: ");
562 if (have_residual_data)
563 seq_printf(m, "%ldMHz\n",
564 (res->VitalProductData.ProcessorHz > 1024) ?
565 res->VitalProductData.ProcessorHz / 1000000 :
566 res->VitalProductData.ProcessorHz);
567 else
568 seq_printf(m, "???\n");
569
570 return 0;
571}
572
573#ifdef CONFIG_SOUND_CS4232
574static long __init masktoint(unsigned int i)
575{
576 int t = -1;
577 while (i >> ++t)
578 ;
579 return (t-1);
580}
581
582/*
583 * ppc_cs4232_dma and ppc_cs4232_dma2 are used in include/asm/dma.h
584 * to distinguish sound dma-channels from others. This is because
585 * blocksize on 16 bit dma-channels 5,6,7 is 128k, but
586 * the cs4232.c uses 64k like on 8 bit dma-channels 0,1,2,3
587 */
588
589static void __init prep_init_sound(void)
590{
591 PPC_DEVICE *audiodevice = NULL;
592
593 /*
594 * Get the needed resource informations from residual data.
595 *
596 */
597 if (have_residual_data)
598 audiodevice = residual_find_device(~0, NULL,
599 MultimediaController, AudioController, -1, 0);
600
601 if (audiodevice != NULL) {
602 PnP_TAG_PACKET *pkt;
603
604 pkt = PnP_find_packet((unsigned char *)&res->DevicePnPHeap[audiodevice->AllocatedOffset],
605 S5_Packet, 0);
606 if (pkt != NULL)
607 ppc_cs4232_dma = masktoint(pkt->S5_Pack.DMAMask);
608 pkt = PnP_find_packet((unsigned char*)&res->DevicePnPHeap[audiodevice->AllocatedOffset],
609 S5_Packet, 1);
610 if (pkt != NULL)
611 ppc_cs4232_dma2 = masktoint(pkt->S5_Pack.DMAMask);
612 }
613
614 /*
615 * These are the PReP specs' defaults for the cs4231. We use these
616 * as fallback incase we don't have residual data.
617 * At least the IBM Thinkpad 850 with IDE DMA Channels at 6 and 7
618 * will use the other values.
619 */
620 if (audiodevice == NULL) {
621 switch (_prep_type) {
622 case _PREP_IBM:
623 ppc_cs4232_dma = 1;
624 ppc_cs4232_dma2 = -1;
625 break;
626 default:
627 ppc_cs4232_dma = 6;
628 ppc_cs4232_dma2 = 7;
629 }
630 }
631
632 /*
633 * Find a way to push these informations to the cs4232 driver
634 * Give it out with printk, when not in cmd_line?
635 * Append it to cmd_line and saved_command_line?
636 * Format is cs4232=io,irq,dma,dma2
637 */
638}
639#endif /* CONFIG_SOUND_CS4232 */
640
641/*
642 * Fill out screen_info according to the residual data. This allows us to use
643 * at least vesafb.
644 */
645static void __init
646prep_init_vesa(void)
647{
648#if (defined(CONFIG_FB_VGA16) || defined(CONFIG_FB_VGA16_MODULE) || \
649 defined(CONFIG_FB_VESA))
650 PPC_DEVICE *vgadev = NULL;
651
652 if (have_residual_data)
653 vgadev = residual_find_device(~0, NULL, DisplayController,
654 SVGAController, -1, 0);
655
656 if (vgadev != NULL) {
657 PnP_TAG_PACKET *pkt;
658
659 pkt = PnP_find_large_vendor_packet(
660 (unsigned char *)&res->DevicePnPHeap[vgadev->AllocatedOffset],
661 0x04, 0); /* 0x04 = Display Tag */
662 if (pkt != NULL) {
663 unsigned char *ptr = (unsigned char *)pkt;
664
665 if (ptr[4]) {
666 /* graphics mode */
667 screen_info.orig_video_isVGA = VIDEO_TYPE_VLFB;
668
669 screen_info.lfb_depth = ptr[4] * 8;
670
671 screen_info.lfb_width = swab16(*(short *)(ptr+6));
672 screen_info.lfb_height = swab16(*(short *)(ptr+8));
673 screen_info.lfb_linelength = swab16(*(short *)(ptr+10));
674
675 screen_info.lfb_base = swab32(*(long *)(ptr+12));
676 screen_info.lfb_size = swab32(*(long *)(ptr+20)) / 65536;
677 }
678 }
679 }
680#endif
681}
682
683/*
684 * Set DBAT 2 to access 0x80000000 so early progress messages will work
685 */
686static __inline__ void
687prep_set_bat(void)
688{
689 /* wait for all outstanding memory access to complete */
690 mb();
691
692 /* setup DBATs */
693 mtspr(SPRN_DBAT2U, 0x80001ffe);
694 mtspr(SPRN_DBAT2L, 0x8000002a);
695
696 /* wait for updates */
697 mb();
698}
699
700/*
701 * IBM 3-digit status LED
702 */
703static unsigned int ibm_statusled_base __prepdata;
704
705static void __prep
706ibm_statusled_progress(char *s, unsigned short hex);
707
708static int __prep
709ibm_statusled_panic(struct notifier_block *dummy1, unsigned long dummy2,
710 void * dummy3)
711{
712 ibm_statusled_progress(NULL, 0x505); /* SOS */
713 return NOTIFY_DONE;
714}
715
716static struct notifier_block ibm_statusled_block __prepdata = {
717 ibm_statusled_panic,
718 NULL,
719 INT_MAX /* try to do it first */
720};
721
722static void __prep
723ibm_statusled_progress(char *s, unsigned short hex)
724{
725 static int notifier_installed;
726 /*
727 * Progress uses 4 digits and we have only 3. So, we map 0xffff to
728 * 0xfff for display switch off. Out of range values are mapped to
729 * 0xeff, as I'm told 0xf00 and above are reserved for hardware codes.
730 * Install the panic notifier when the display is first switched off.
731 */
732 if (hex == 0xffff) {
733 hex = 0xfff;
734 if (!notifier_installed) {
735 ++notifier_installed;
736 notifier_chain_register(&panic_notifier_list,
737 &ibm_statusled_block);
738 }
739 }
740 else
741 if (hex > 0xfff)
742 hex = 0xeff;
743
744 mb();
745 outw(hex, ibm_statusled_base);
746}
747
748static void __init
749ibm_statusled_init(void)
750{
751 /*
752 * The IBM 3-digit LED display is specified in the residual data
753 * as an operator panel device, type "System Status LED". Find
754 * that device and determine its address. We validate all the
755 * other parameters on the off-chance another, similar device
756 * exists.
757 */
758 if (have_residual_data) {
759 PPC_DEVICE *led;
760 PnP_TAG_PACKET *pkt;
761
762 led = residual_find_device(~0, NULL, SystemPeripheral,
763 OperatorPanel, SystemStatusLED, 0);
764 if (!led)
765 return;
766
767 pkt = PnP_find_packet((unsigned char *)
768 &res->DevicePnPHeap[led->AllocatedOffset], S8_Packet, 0);
769 if (!pkt)
770 return;
771
772 if (pkt->S8_Pack.IOInfo != ISAAddr16bit)
773 return;
774 if (*(unsigned short *)pkt->S8_Pack.RangeMin !=
775 *(unsigned short *)pkt->S8_Pack.RangeMax)
776 return;
777 if (pkt->S8_Pack.IOAlign != 2)
778 return;
779 if (pkt->S8_Pack.IONum != 2)
780 return;
781
782 ibm_statusled_base = ld_le16((unsigned short *)
783 (pkt->S8_Pack.RangeMin));
784 ppc_md.progress = ibm_statusled_progress;
785 }
786}
787
788static void __init
789prep_setup_arch(void)
790{
791 unsigned char reg;
792 int is_ide=0;
793
794 /* init to some ~sane value until calibrate_delay() runs */
795 loops_per_jiffy = 50000000;
796
797 /* Lookup PCI host bridges */
798 prep_find_bridges();
799
800 /* Set up floppy in PS/2 mode */
801 outb(0x09, SIO_CONFIG_RA);
802 reg = inb(SIO_CONFIG_RD);
803 reg = (reg & 0x3F) | 0x40;
804 outb(reg, SIO_CONFIG_RD);
805 outb(reg, SIO_CONFIG_RD); /* Have to write twice to change! */
806
807 switch ( _prep_type )
808 {
809 case _PREP_IBM:
810 reg = inb(PREP_IBM_PLANAR);
811 printk(KERN_INFO "IBM planar ID: %02x", reg);
812 switch (reg) {
813 case PREP_IBM_SANDALFOOT:
814 prep_gen_enable_l2();
815 setup_ibm_pci = prep_sandalfoot_setup_pci;
816 ppc_md.power_off = prep_sig750_poweroff;
817 ppc_md.show_cpuinfo = prep_sandalfoot_cpuinfo;
818 break;
819 case PREP_IBM_THINKPAD:
820 prep_gen_enable_l2();
821 setup_ibm_pci = prep_thinkpad_setup_pci;
822 ppc_md.power_off = prep_carrera_poweroff;
823 ppc_md.show_cpuinfo = prep_thinkpad_cpuinfo;
824 break;
825 default:
826 if (have_residual_data) {
827 prep_gen_enable_l2();
828 setup_ibm_pci = prep_residual_setup_pci;
829 ppc_md.power_off = prep_halt;
830 ppc_md.show_cpuinfo = prep_gen_cpuinfo;
831 break;
832 }
833 else
834 printk(" - unknown! Assuming Carolina");
835 /* fall through */
836 case PREP_IBM_CAROLINA_IDE_0:
837 case PREP_IBM_CAROLINA_IDE_1:
838 case PREP_IBM_CAROLINA_IDE_2:
839 case PREP_IBM_CAROLINA_IDE_3:
840 is_ide = 1;
841 case PREP_IBM_CAROLINA_SCSI_0:
842 case PREP_IBM_CAROLINA_SCSI_1:
843 case PREP_IBM_CAROLINA_SCSI_2:
844 case PREP_IBM_CAROLINA_SCSI_3:
845 prep_carolina_enable_l2();
846 setup_ibm_pci = prep_carolina_setup_pci;
847 ppc_md.power_off = prep_sig750_poweroff;
848 ppc_md.show_cpuinfo = prep_carolina_cpuinfo;
849 break;
850 case PREP_IBM_TIGER1_133:
851 case PREP_IBM_TIGER1_166:
852 case PREP_IBM_TIGER1_180:
853 case PREP_IBM_TIGER1_xxx:
854 case PREP_IBM_TIGER1_333:
855 prep_carolina_enable_l2();
856 setup_ibm_pci = prep_tiger1_setup_pci;
857 ppc_md.power_off = prep_sig750_poweroff;
858 ppc_md.show_cpuinfo = prep_tiger1_cpuinfo;
859 break;
860 }
861 printk("\n");
862
863 /* default root device */
864 if (is_ide)
865 ROOT_DEV = MKDEV(IDE0_MAJOR, 3);
866 else
867 ROOT_DEV = MKDEV(SCSI_DISK0_MAJOR, 3);
868
869 break;
870 case _PREP_Motorola:
871 prep_gen_enable_l2();
872 ppc_md.power_off = prep_halt;
873 ppc_md.show_cpuinfo = prep_mot_cpuinfo;
874
875#ifdef CONFIG_BLK_DEV_INITRD
876 if (initrd_start)
877 ROOT_DEV = Root_RAM0;
878 else
879#endif
880#ifdef CONFIG_ROOT_NFS
881 ROOT_DEV = Root_NFS;
882#else
883 ROOT_DEV = Root_SDA2;
884#endif
885 break;
886 }
887
888 /* Read in NVRAM data */
889 init_prep_nvram();
890
891 /* if no bootargs, look in NVRAM */
892 if ( cmd_line[0] == '\0' ) {
893 char *bootargs;
894 bootargs = prep_nvram_get_var("bootargs");
895 if (bootargs != NULL) {
896 strcpy(cmd_line, bootargs);
897 /* again.. */
898 strcpy(saved_command_line, cmd_line);
899 }
900 }
901
902#ifdef CONFIG_SOUND_CS4232
903 prep_init_sound();
904#endif /* CONFIG_SOUND_CS4232 */
905
906 prep_init_vesa();
907
908 switch (_prep_type) {
909 case _PREP_Motorola:
910 raven_init();
911 break;
912 case _PREP_IBM:
913 ibm_prep_init();
914 break;
915 }
916
917#ifdef CONFIG_VGA_CONSOLE
918 /* vgacon.c needs to know where we mapped IO memory in io_block_mapping() */
919 vgacon_remap_base = 0xf0000000;
920 conswitchp = &vga_con;
921#endif
922}
923
924/*
925 * First, see if we can get this information from the residual data.
926 * This is important on some IBM PReP systems. If we cannot, we let the
927 * TODC code handle doing this.
928 */
929static void __init
930prep_calibrate_decr(void)
931{
932 if (have_residual_data) {
933 unsigned long freq, divisor = 4;
934
935 if ( res->VitalProductData.ProcessorBusHz ) {
936 freq = res->VitalProductData.ProcessorBusHz;
937 printk("time_init: decrementer frequency = %lu.%.6lu MHz\n",
938 (freq/divisor)/1000000,
939 (freq/divisor)%1000000);
940 tb_to_us = mulhwu_scale_factor(freq/divisor, 1000000);
941 tb_ticks_per_jiffy = freq / HZ / divisor;
942 }
943 }
944 else
945 todc_calibrate_decr();
946}
947
948static unsigned int __prep
949prep_irq_canonicalize(u_int irq)
950{
951 if (irq == 2)
952 {
953 return 9;
954 }
955 else
956 {
957 return irq;
958 }
959}
960
961static void __init
962prep_init_IRQ(void)
963{
964 int i;
965 unsigned int pci_viddid, pci_did;
966
967 if (OpenPIC_Addr != NULL) {
968 openpic_init(NUM_8259_INTERRUPTS);
969 /* We have a cascade on OpenPIC IRQ 0, Linux IRQ 16 */
970 openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
971 i8259_irq);
972 }
973 for ( i = 0 ; i < NUM_8259_INTERRUPTS ; i++ )
974 irq_desc[i].handler = &i8259_pic;
975
976 if (have_residual_data) {
977 i8259_init(residual_isapic_addr());
978 return;
979 }
980
981 /* If we have a Raven PCI bridge or a Hawk PCI bridge / Memory
982 * controller, we poll (as they have a different int-ack address). */
983 early_read_config_dword(NULL, 0, 0, PCI_VENDOR_ID, &pci_viddid);
984 pci_did = (pci_viddid & 0xffff0000) >> 16;
985 if (((pci_viddid & 0xffff) == PCI_VENDOR_ID_MOTOROLA)
986 && ((pci_did == PCI_DEVICE_ID_MOTOROLA_RAVEN)
987 || (pci_did == PCI_DEVICE_ID_MOTOROLA_HAWK)))
988 i8259_init(0);
989 else
990 /* PCI interrupt ack address given in section 6.1.8 of the
991 * PReP specification. */
992 i8259_init(MPC10X_MAPA_PCI_INTACK_ADDR);
993}
994
995#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
996/*
997 * IDE stuff.
998 */
999static int __prep
1000prep_ide_default_irq(unsigned long base)
1001{
1002 switch (base) {
1003 case 0x1f0: return 13;
1004 case 0x170: return 13;
1005 case 0x1e8: return 11;
1006 case 0x168: return 10;
1007 case 0xfff0: return 14; /* MCP(N)750 ide0 */
1008 case 0xffe0: return 15; /* MCP(N)750 ide1 */
1009 default: return 0;
1010 }
1011}
1012
1013static unsigned long __prep
1014prep_ide_default_io_base(int index)
1015{
1016 switch (index) {
1017 case 0: return 0x1f0;
1018 case 1: return 0x170;
1019 case 2: return 0x1e8;
1020 case 3: return 0x168;
1021 default:
1022 return 0;
1023 }
1024}
1025#endif
1026
1027#ifdef CONFIG_SMP
1028/* PReP (MTX) support */
1029static int __init
1030smp_prep_probe(void)
1031{
1032 extern int mot_multi;
1033
1034 if (mot_multi) {
1035 openpic_request_IPIs();
1036 smp_hw_index[1] = 1;
1037 return 2;
1038 }
1039
1040 return 1;
1041}
1042
1043static void __init
1044smp_prep_kick_cpu(int nr)
1045{
1046 *(unsigned long *)KERNELBASE = nr;
1047 asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
1048 printk("CPU1 released, waiting\n");
1049}
1050
1051static void __init
1052smp_prep_setup_cpu(int cpu_nr)
1053{
1054 if (OpenPIC_Addr)
1055 do_openpic_setup_cpu();
1056}
1057
1058static struct smp_ops_t prep_smp_ops __prepdata = {
1059 smp_openpic_message_pass,
1060 smp_prep_probe,
1061 smp_prep_kick_cpu,
1062 smp_prep_setup_cpu,
1063 .give_timebase = smp_generic_give_timebase,
1064 .take_timebase = smp_generic_take_timebase,
1065};
1066#endif /* CONFIG_SMP */
1067
1068/*
1069 * Setup the bat mappings we're going to load that cover
1070 * the io areas. RAM was mapped by mapin_ram().
1071 * -- Cort
1072 */
1073static void __init
1074prep_map_io(void)
1075{
1076 io_block_mapping(0x80000000, PREP_ISA_IO_BASE, 0x10000000, _PAGE_IO);
1077 io_block_mapping(0xf0000000, PREP_ISA_MEM_BASE, 0x08000000, _PAGE_IO);
1078}
1079
1080static int __init
1081prep_request_io(void)
1082{
1083 if (_machine == _MACH_prep) {
1084#ifdef CONFIG_NVRAM
1085 request_region(PREP_NVRAM_AS0, 0x8, "nvram");
1086#endif
1087 request_region(0x00,0x20,"dma1");
1088 request_region(0x40,0x20,"timer");
1089 request_region(0x80,0x10,"dma page reg");
1090 request_region(0xc0,0x20,"dma2");
1091 }
1092
1093 return 0;
1094}
1095
1096device_initcall(prep_request_io);
1097
1098void __init
1099prep_init(unsigned long r3, unsigned long r4, unsigned long r5,
1100 unsigned long r6, unsigned long r7)
1101{
1102#ifdef CONFIG_PREP_RESIDUAL
1103 /* make a copy of residual data */
1104 if ( r3 ) {
1105 memcpy((void *)res,(void *)(r3+KERNELBASE),
1106 sizeof(RESIDUAL));
1107 }
1108#endif
1109
1110 isa_io_base = PREP_ISA_IO_BASE;
1111 isa_mem_base = PREP_ISA_MEM_BASE;
1112 pci_dram_offset = PREP_PCI_DRAM_OFFSET;
1113 ISA_DMA_THRESHOLD = 0x00ffffff;
1114 DMA_MODE_READ = 0x44;
1115 DMA_MODE_WRITE = 0x48;
1116
1117 /* figure out what kind of prep workstation we are */
1118 if (have_residual_data) {
1119 if ( !strncmp(res->VitalProductData.PrintableModel,"IBM",3) )
1120 _prep_type = _PREP_IBM;
1121 else
1122 _prep_type = _PREP_Motorola;
1123 }
1124 else {
1125 /* assume motorola if no residual (netboot?) */
1126 _prep_type = _PREP_Motorola;
1127 }
1128
1129#ifdef CONFIG_PREP_RESIDUAL
1130 /* Switch off all residual data processing if the user requests it */
1131 if (strstr(cmd_line, "noresidual") != NULL)
1132 res = NULL;
1133#endif
1134
1135 /* Initialise progress early to get maximum benefit */
1136 prep_set_bat();
1137 ibm_statusled_init();
1138
1139 ppc_md.setup_arch = prep_setup_arch;
1140 ppc_md.show_percpuinfo = prep_show_percpuinfo;
1141 ppc_md.show_cpuinfo = NULL; /* set in prep_setup_arch() */
1142 ppc_md.irq_canonicalize = prep_irq_canonicalize;
1143 ppc_md.init_IRQ = prep_init_IRQ;
1144 /* this gets changed later on if we have an OpenPIC -- Cort */
1145 ppc_md.get_irq = i8259_irq;
1146
1147 ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
1148
1149 ppc_md.restart = prep_restart;
1150 ppc_md.power_off = NULL; /* set in prep_setup_arch() */
1151 ppc_md.halt = prep_halt;
1152
1153 ppc_md.nvram_read_val = prep_nvram_read_val;
1154 ppc_md.nvram_write_val = prep_nvram_write_val;
1155
1156 ppc_md.time_init = todc_time_init;
1157 if (_prep_type == _PREP_IBM) {
1158 ppc_md.rtc_read_val = todc_mc146818_read_val;
1159 ppc_md.rtc_write_val = todc_mc146818_write_val;
1160 TODC_INIT(TODC_TYPE_MC146818, RTC_PORT(0), NULL, RTC_PORT(1),
1161 8);
1162 } else {
1163 TODC_INIT(TODC_TYPE_MK48T59, PREP_NVRAM_AS0, PREP_NVRAM_AS1,
1164 PREP_NVRAM_DATA, 8);
1165 }
1166
1167 ppc_md.calibrate_decr = prep_calibrate_decr;
1168 ppc_md.set_rtc_time = todc_set_rtc_time;
1169 ppc_md.get_rtc_time = todc_get_rtc_time;
1170
1171 ppc_md.setup_io_mappings = prep_map_io;
1172
1173#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
1174 ppc_ide_md.default_irq = prep_ide_default_irq;
1175 ppc_ide_md.default_io_base = prep_ide_default_io_base;
1176#endif
1177
1178#ifdef CONFIG_SMP
1179 ppc_md.smp_ops = &prep_smp_ops;
1180#endif /* CONFIG_SMP */
1181}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-22 13:25:06 -0500