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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / arch / ppc / platforms / prep_setup.c
blob38449855d5ffbede401cf147a5d8af8a76abc086
1 /*
2 * Copyright (C) 1995 Linus Torvalds
3 * Adapted from 'alpha' version by Gary Thomas
4 * Modified by Cort Dougan (cort@cs.nmt.edu)
5 *
6 * Support for PReP (Motorola MTX/MVME)
7 * by Troy Benjegerdes (hozer@drgw.net)
8 */
9
10 /*
11 * bootup setup stuff..
12 */
13
14 #include <linux/delay.h>
15 #include <linux/module.h>
16 #include <linux/errno.h>
17 #include <linux/sched.h>
18 #include <linux/kernel.h>
19 #include <linux/mm.h>
20 #include <linux/stddef.h>
21 #include <linux/unistd.h>
22 #include <linux/ptrace.h>
23 #include <linux/slab.h>
24 #include <linux/user.h>
25 #include <linux/a.out.h>
26 #include <linux/screen_info.h>
27 #include <linux/major.h>
28 #include <linux/interrupt.h>
29 #include <linux/reboot.h>
30 #include <linux/init.h>
31 #include <linux/initrd.h>
32 #include <linux/ioport.h>
33 #include <linux/console.h>
34 #include <linux/timex.h>
35 #include <linux/pci.h>
36 #include <linux/ide.h>
37 #include <linux/seq_file.h>
38 #include <linux/root_dev.h>
39
40 #include <asm/sections.h>
41 #include <asm/mmu.h>
42 #include <asm/processor.h>
43 #include <asm/residual.h>
44 #include <asm/io.h>
45 #include <asm/pgtable.h>
46 #include <asm/cache.h>
47 #include <asm/dma.h>
48 #include <asm/machdep.h>
49 #include <asm/mc146818rtc.h>
50 #include <asm/mk48t59.h>
51 #include <asm/prep_nvram.h>
52 #include <asm/raven.h>
53 #include <asm/vga.h>
54 #include <asm/time.h>
55 #include <asm/mpc10x.h>
56 #include <asm/i8259.h>
57 #include <asm/open_pic.h>
58 #include <asm/pci-bridge.h>
59 #include <asm/todc.h>
60
61 /* prep registers for L2 */
62 #define CACHECRBA 0x80000823 /* Cache configuration register address */
63 #define L2CACHE_MASK 0x03 /* Mask for 2 L2 Cache bits */
64 #define L2CACHE_512KB 0x00 /* 512KB */
65 #define L2CACHE_256KB 0x01 /* 256KB */
66 #define L2CACHE_1MB 0x02 /* 1MB */
67 #define L2CACHE_NONE 0x03 /* NONE */
68 #define L2CACHE_PARITY 0x08 /* Mask for L2 Cache Parity Protected bit */
69
70 TODC_ALLOC();
71
72 extern unsigned char prep_nvram_read_val(int addr);
73 extern void prep_nvram_write_val(int addr,
74 unsigned char val);
75 extern unsigned char rs_nvram_read_val(int addr);
76 extern void rs_nvram_write_val(int addr,
77 unsigned char val);
78 extern void ibm_prep_init(void);
79
80 extern void prep_find_bridges(void);
81
82 int _prep_type;
83
84 extern void prep_residual_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
85 extern void prep_sandalfoot_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
86 extern void prep_thinkpad_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
87 extern void prep_carolina_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
88 extern void prep_tiger1_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
89
90
91 #define cached_21 (((char *)(ppc_cached_irq_mask))[3])
92 #define cached_A1 (((char *)(ppc_cached_irq_mask))[2])
93
94 extern PTE *Hash, *Hash_end;
95 extern unsigned long Hash_size, Hash_mask;
96 extern int probingmem;
97 extern unsigned long loops_per_jiffy;
98
99 /* useful ISA ports */
100 #define PREP_SYSCTL 0x81c
101 /* present in the IBM reference design; possibly identical in Mot boxes: */
102 #define PREP_IBM_SIMM_ID 0x803 /* SIMM size: 32 or 8 MiB */
103 #define PREP_IBM_SIMM_PRESENCE 0x804
104 #define PREP_IBM_EQUIPMENT 0x80c
105 #define PREP_IBM_L2INFO 0x80d
106 #define PREP_IBM_PM1 0x82a /* power management register 1 */
107 #define PREP_IBM_PLANAR 0x852 /* planar ID - identifies the motherboard */
108 #define PREP_IBM_DISP 0x8c0 /* 4-digit LED display */
109
110 /* Equipment Present Register masks: */
111 #define PREP_IBM_EQUIPMENT_RESERVED 0x80
112 #define PREP_IBM_EQUIPMENT_SCSIFUSE 0x40
113 #define PREP_IBM_EQUIPMENT_L2_COPYBACK 0x08
114 #define PREP_IBM_EQUIPMENT_L2_256 0x04
115 #define PREP_IBM_EQUIPMENT_CPU 0x02
116 #define PREP_IBM_EQUIPMENT_L2 0x01
117
118 /* planar ID values: */
119 /* Sandalfoot/Sandalbow (6015/7020) */
120 #define PREP_IBM_SANDALFOOT 0xfc
121 /* Woodfield, Thinkpad 850/860 (6042/7249) */
122 #define PREP_IBM_THINKPAD 0xff /* planar ID unimplemented */
123 /* PowerSeries 830/850 (6050/6070) */
124 #define PREP_IBM_CAROLINA_IDE_0 0xf0
125 #define PREP_IBM_CAROLINA_IDE_1 0xf1
126 #define PREP_IBM_CAROLINA_IDE_2 0xf2
127 #define PREP_IBM_CAROLINA_IDE_3 0xf3
128 /* 7248-43P */
129 #define PREP_IBM_CAROLINA_SCSI_0 0xf4
130 #define PREP_IBM_CAROLINA_SCSI_1 0xf5
131 #define PREP_IBM_CAROLINA_SCSI_2 0xf6
132 #define PREP_IBM_CAROLINA_SCSI_3 0xf7 /* missing from Carolina Tech Spec */
133 /* Tiger1 (7043-140) */
134 #define PREP_IBM_TIGER1_133 0xd1
135 #define PREP_IBM_TIGER1_166 0xd2
136 #define PREP_IBM_TIGER1_180 0xd3
137 #define PREP_IBM_TIGER1_xxx 0xd4 /* unknown, but probably exists */
138 #define PREP_IBM_TIGER1_333 0xd5 /* missing from Tiger Tech Spec */
139
140 /* setup_ibm_pci:
141 * set Motherboard_map_name, Motherboard_map, Motherboard_routes.
142 * return 8259 edge/level masks.
143 */
144 void (*setup_ibm_pci)(char *irq_lo, char *irq_hi);
145
146 extern char *Motherboard_map_name; /* for use in *_cpuinfo */
147
148 /*
149 * As found in the PReP reference implementation.
150 * Used by Thinkpad, Sandalfoot (6015/7020), and all Motorola PReP.
151 */
152 static void __init
153 prep_gen_enable_l2(void)
154 {
155 outb(inb(PREP_SYSCTL) | 0x3, PREP_SYSCTL);
156 }
157
158 /* Used by Carolina and Tiger1 */
159 static void __init
160 prep_carolina_enable_l2(void)
161 {
162 outb(inb(PREP_SYSCTL) | 0xc0, PREP_SYSCTL);
163 }
164
165 /* cpuinfo code common to all IBM PReP */
166 static void
167 prep_ibm_cpuinfo(struct seq_file *m)
168 {
169 unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
170
171 seq_printf(m, "machine\t\t: PReP %s\n", Motherboard_map_name);
172
173 seq_printf(m, "upgrade cpu\t: ");
174 if (equip_reg & PREP_IBM_EQUIPMENT_CPU) {
175 seq_printf(m, "not ");
176 }
177 seq_printf(m, "present\n");
178
179 /* print info about the SCSI fuse */
180 seq_printf(m, "scsi fuse\t: ");
181 if (equip_reg & PREP_IBM_EQUIPMENT_SCSIFUSE)
182 seq_printf(m, "ok");
183 else
184 seq_printf(m, "bad");
185 seq_printf(m, "\n");
186
187 /* print info about SIMMs */
188 if (have_residual_data) {
189 int i;
190 seq_printf(m, "simms\t\t: ");
191 for (i = 0; (res->ActualNumMemories) && (i < MAX_MEMS); i++) {
192 if (res->Memories[i].SIMMSize != 0)
193 seq_printf(m, "%d:%ldMiB ", i,
194 (res->Memories[i].SIMMSize > 1024) ?
195 res->Memories[i].SIMMSize>>20 :
196 res->Memories[i].SIMMSize);
197 }
198 seq_printf(m, "\n");
199 }
200 }
201
202 static int
203 prep_gen_cpuinfo(struct seq_file *m)
204 {
205 prep_ibm_cpuinfo(m);
206 return 0;
207 }
208
209 static int
210 prep_sandalfoot_cpuinfo(struct seq_file *m)
211 {
212 unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
213
214 prep_ibm_cpuinfo(m);
215
216 /* report amount and type of L2 cache present */
217 seq_printf(m, "L2 cache\t: ");
218 if (equip_reg & PREP_IBM_EQUIPMENT_L2) {
219 seq_printf(m, "not present");
220 } else {
221 if (equip_reg & PREP_IBM_EQUIPMENT_L2_256)
222 seq_printf(m, "256KiB");
223 else
224 seq_printf(m, "unknown size");
225
226 if (equip_reg & PREP_IBM_EQUIPMENT_L2_COPYBACK)
227 seq_printf(m, ", copy-back");
228 else
229 seq_printf(m, ", write-through");
230 }
231 seq_printf(m, "\n");
232
233 return 0;
234 }
235
236 static int
237 prep_thinkpad_cpuinfo(struct seq_file *m)
238 {
239 unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
240 char *cpubus_speed, *pci_speed;
241
242 prep_ibm_cpuinfo(m);
243
244 /* report amount and type of L2 cache present */
245 seq_printf(m, "l2 cache\t: ");
246 if ((equip_reg & 0x1) == 0) {
247 switch ((equip_reg & 0xc) >> 2) {
248 case 0x0:
249 seq_printf(m, "128KiB look-aside 2-way write-through\n");
250 break;
251 case 0x1:
252 seq_printf(m, "512KiB look-aside direct-mapped write-back\n");
253 break;
254 case 0x2:
255 seq_printf(m, "256KiB look-aside 2-way write-through\n");
256 break;
257 case 0x3:
258 seq_printf(m, "256KiB look-aside direct-mapped write-back\n");
259 break;
260 }
261 } else {
262 seq_printf(m, "not present\n");
263 }
264
265 /* report bus speeds because we can */
266 if ((equip_reg & 0x80) == 0) {
267 switch ((equip_reg & 0x30) >> 4) {
268 case 0x1:
269 cpubus_speed = "50";
270 pci_speed = "25";
271 break;
272 case 0x3:
273 cpubus_speed = "66";
274 pci_speed = "33";
275 break;
276 default:
277 cpubus_speed = "unknown";
278 pci_speed = "unknown";
279 break;
280 }
281 } else {
282 switch ((equip_reg & 0x30) >> 4) {
283 case 0x1:
284 cpubus_speed = "25";
285 pci_speed = "25";
286 break;
287 case 0x2:
288 cpubus_speed = "60";
289 pci_speed = "30";
290 break;
291 case 0x3:
292 cpubus_speed = "33";
293 pci_speed = "33";
294 break;
295 default:
296 cpubus_speed = "unknown";
297 pci_speed = "unknown";
298 break;
299 }
300 }
301 seq_printf(m, "60x bus\t\t: %sMHz\n", cpubus_speed);
302 seq_printf(m, "pci bus\t\t: %sMHz\n", pci_speed);
303
304 return 0;
305 }
306
307 static int
308 prep_carolina_cpuinfo(struct seq_file *m)
309 {
310 unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
311
312 prep_ibm_cpuinfo(m);
313
314 /* report amount and type of L2 cache present */
315 seq_printf(m, "l2 cache\t: ");
316 if ((equip_reg & 0x1) == 0) {
317 unsigned int l2_reg = inb(PREP_IBM_L2INFO);
318
319 /* L2 size */
320 if ((l2_reg & 0x60) == 0)
321 seq_printf(m, "256KiB");
322 else if ((l2_reg & 0x60) == 0x20)
323 seq_printf(m, "512KiB");
324 else
325 seq_printf(m, "unknown size");
326
327 /* L2 type */
328 if ((l2_reg & 0x3) == 0)
329 seq_printf(m, ", async");
330 else if ((l2_reg & 0x3) == 1)
331 seq_printf(m, ", sync");
332 else
333 seq_printf(m, ", unknown type");
334
335 seq_printf(m, "\n");
336 } else {
337 seq_printf(m, "not present\n");
338 }
339
340 return 0;
341 }
342
343 static int
344 prep_tiger1_cpuinfo(struct seq_file *m)
345 {
346 unsigned int l2_reg = inb(PREP_IBM_L2INFO);
347
348 prep_ibm_cpuinfo(m);
349
350 /* report amount and type of L2 cache present */
351 seq_printf(m, "l2 cache\t: ");
352 if ((l2_reg & 0xf) == 0xf) {
353 seq_printf(m, "not present\n");
354 } else {
355 if (l2_reg & 0x8)
356 seq_printf(m, "async, ");
357 else
358 seq_printf(m, "sync burst, ");
359
360 if (l2_reg & 0x4)
361 seq_printf(m, "parity, ");
362 else
363 seq_printf(m, "no parity, ");
364
365 switch (l2_reg & 0x3) {
366 case 0x0:
367 seq_printf(m, "256KiB\n");
368 break;
369 case 0x1:
370 seq_printf(m, "512KiB\n");
371 break;
372 case 0x2:
373 seq_printf(m, "1MiB\n");
374 break;
375 default:
376 seq_printf(m, "unknown size\n");
377 break;
378 }
379 }
380
381 return 0;
382 }
383
384
385 /* Used by all Motorola PReP */
386 static int
387 prep_mot_cpuinfo(struct seq_file *m)
388 {
389 unsigned int cachew = *((unsigned char *)CACHECRBA);
390
391 seq_printf(m, "machine\t\t: PReP %s\n", Motherboard_map_name);
392
393 /* report amount and type of L2 cache present */
394 seq_printf(m, "l2 cache\t: ");
395 switch (cachew & L2CACHE_MASK) {
396 case L2CACHE_512KB:
397 seq_printf(m, "512KiB");
398 break;
399 case L2CACHE_256KB:
400 seq_printf(m, "256KiB");
401 break;
402 case L2CACHE_1MB:
403 seq_printf(m, "1MiB");
404 break;
405 case L2CACHE_NONE:
406 seq_printf(m, "none\n");
407 goto no_l2;
408 break;
409 default:
410 seq_printf(m, "%x\n", cachew);
411 }
412
413 seq_printf(m, ", parity %s",
414 (cachew & L2CACHE_PARITY)? "enabled" : "disabled");
415
416 seq_printf(m, " SRAM:");
417
418 switch ( ((cachew & 0xf0) >> 4) & ~(0x3) ) {
419 case 1: seq_printf(m, "synchronous, parity, flow-through\n");
420 break;
421 case 2: seq_printf(m, "asynchronous, no parity\n");
422 break;
423 case 3: seq_printf(m, "asynchronous, parity\n");
424 break;
425 default:seq_printf(m, "synchronous, pipelined, no parity\n");
426 break;
427 }
428
429 no_l2:
430 /* print info about SIMMs */
431 if (have_residual_data) {
432 int i;
433 seq_printf(m, "simms\t\t: ");
434 for (i = 0; (res->ActualNumMemories) && (i < MAX_MEMS); i++) {
435 if (res->Memories[i].SIMMSize != 0)
436 seq_printf(m, "%d:%ldM ", i,
437 (res->Memories[i].SIMMSize > 1024) ?
438 res->Memories[i].SIMMSize>>20 :
439 res->Memories[i].SIMMSize);
440 }
441 seq_printf(m, "\n");
442 }
443
444 return 0;
445 }
446
447 static void
448 prep_restart(char *cmd)
449 {
450 #define PREP_SP92 0x92 /* Special Port 92 */
451 local_irq_disable(); /* no interrupts */
452
453 /* set exception prefix high - to the prom */
454 _nmask_and_or_msr(0, MSR_IP);
455
456 /* make sure bit 0 (reset) is a 0 */
457 outb( inb(PREP_SP92) & ~1L , PREP_SP92);
458 /* signal a reset to system control port A - soft reset */
459 outb( inb(PREP_SP92) | 1 , PREP_SP92);
460
461 while ( 1 ) ;
462 /* not reached */
463 #undef PREP_SP92
464 }
465
466 static void
467 prep_halt(void)
468 {
469 local_irq_disable(); /* no interrupts */
470
471 /* set exception prefix high - to the prom */
472 _nmask_and_or_msr(0, MSR_IP);
473
474 while ( 1 ) ;
475 /* not reached */
476 }
477
478 /* Carrera is the power manager in the Thinkpads. Unfortunately not much is
479 * known about it, so we can't power down.
480 */
481 static void
482 prep_carrera_poweroff(void)
483 {
484 prep_halt();
485 }
486
487 /*
488 * On most IBM PReP's, power management is handled by a Signetics 87c750
489 * behind the Utah component on the ISA bus. To access the 750 you must write
490 * a series of nibbles to port 0x82a (decoded by the Utah). This is described
491 * somewhat in the IBM Carolina Technical Specification.
492 * -Hollis
493 */
494 static void
495 utah_sig87c750_setbit(unsigned int bytenum, unsigned int bitnum, int value)
496 {
497 /*
498 * byte1: 0 0 0 1 0 d a5 a4
499 * byte2: 0 0 0 1 a3 a2 a1 a0
500 *
501 * d = the bit's value, enabled or disabled
502 * (a5 a4 a3) = the byte number, minus 20
503 * (a2 a1 a0) = the bit number
504 *
505 * example: set the 5th bit of byte 21 (21.5)
506 * a5 a4 a3 = 001 (byte 1)
507 * a2 a1 a0 = 101 (bit 5)
508 *
509 * byte1 = 0001 0100 (0x14)
510 * byte2 = 0001 1101 (0x1d)
511 */
512 unsigned char byte1=0x10, byte2=0x10;
513
514 /* the 750's '20.0' is accessed as '0.0' through Utah (which adds 20) */
515 bytenum -= 20;
516
517 byte1 |= (!!value) << 2; /* set d */
518 byte1 |= (bytenum >> 1) & 0x3; /* set a5, a4 */
519
520 byte2 |= (bytenum & 0x1) << 3; /* set a3 */
521 byte2 |= bitnum & 0x7; /* set a2, a1, a0 */
522
523 outb(byte1, PREP_IBM_PM1); /* first nibble */
524 mb();
525 udelay(100); /* important: let controller recover */
526
527 outb(byte2, PREP_IBM_PM1); /* second nibble */
528 mb();
529 udelay(100); /* important: let controller recover */
530 }
531
532 static void
533 prep_sig750_poweroff(void)
534 {
535 /* tweak the power manager found in most IBM PRePs (except Thinkpads) */
536
537 local_irq_disable();
538 /* set exception prefix high - to the prom */
539 _nmask_and_or_msr(0, MSR_IP);
540
541 utah_sig87c750_setbit(21, 5, 1); /* set bit 21.5, "PMEXEC_OFF" */
542
543 while (1) ;
544 /* not reached */
545 }
546
547 static int
548 prep_show_percpuinfo(struct seq_file *m, int i)
549 {
550 /* PREP's without residual data will give incorrect values here */
551 seq_printf(m, "clock\t\t: ");
552 if (have_residual_data)
553 seq_printf(m, "%ldMHz\n",
554 (res->VitalProductData.ProcessorHz > 1024) ?
555 res->VitalProductData.ProcessorHz / 1000000 :
556 res->VitalProductData.ProcessorHz);
557 else
558 seq_printf(m, "???\n");
559
560 return 0;
561 }
562
563 /*
564 * Fill out screen_info according to the residual data. This allows us to use
565 * at least vesafb.
566 */
567 static void __init
568 prep_init_vesa(void)
569 {
570 #if (defined(CONFIG_FB_VGA16) || defined(CONFIG_FB_VGA16_MODULE) || \
571 defined(CONFIG_FB_VESA))
572 PPC_DEVICE *vgadev = NULL;
573
574 if (have_residual_data)
575 vgadev = residual_find_device(~0, NULL, DisplayController,
576 SVGAController, -1, 0);
577
578 if (vgadev != NULL) {
579 PnP_TAG_PACKET *pkt;
580
581 pkt = PnP_find_large_vendor_packet(
582 (unsigned char *)&res->DevicePnPHeap[vgadev->AllocatedOffset],
583 0x04, 0); /* 0x04 = Display Tag */
584 if (pkt != NULL) {
585 unsigned char *ptr = (unsigned char *)pkt;
586
587 if (ptr[4]) {
588 /* graphics mode */
589 screen_info.orig_video_isVGA = VIDEO_TYPE_VLFB;
590
591 screen_info.lfb_depth = ptr[4] * 8;
592
593 screen_info.lfb_width = swab16(*(short *)(ptr+6));
594 screen_info.lfb_height = swab16(*(short *)(ptr+8));
595 screen_info.lfb_linelength = swab16(*(short *)(ptr+10));
596
597 screen_info.lfb_base = swab32(*(long *)(ptr+12));
598 screen_info.lfb_size = swab32(*(long *)(ptr+20)) / 65536;
599 }
600 }
601 }
602 #endif
603 }
604
605 /*
606 * Set DBAT 2 to access 0x80000000 so early progress messages will work
607 */
608 static __inline__ void
609 prep_set_bat(void)
610 {
611 /* wait for all outstanding memory access to complete */
612 mb();
613
614 /* setup DBATs */
615 mtspr(SPRN_DBAT2U, 0x80001ffe);
616 mtspr(SPRN_DBAT2L, 0x8000002a);
617
618 /* wait for updates */
619 mb();
620 }
621
622 /*
623 * IBM 3-digit status LED
624 */
625 static unsigned int ibm_statusled_base;
626
627 static void
628 ibm_statusled_progress(char *s, unsigned short hex);
629
630 static int
631 ibm_statusled_panic(struct notifier_block *dummy1, unsigned long dummy2,
632 void * dummy3)
633 {
634 ibm_statusled_progress(NULL, 0x505); /* SOS */
635 return NOTIFY_DONE;
636 }
637
638 static struct notifier_block ibm_statusled_block = {
639 ibm_statusled_panic,
640 NULL,
641 INT_MAX /* try to do it first */
642 };
643
644 static void
645 ibm_statusled_progress(char *s, unsigned short hex)
646 {
647 static int notifier_installed;
648 /*
649 * Progress uses 4 digits and we have only 3. So, we map 0xffff to
650 * 0xfff for display switch off. Out of range values are mapped to
651 * 0xeff, as I'm told 0xf00 and above are reserved for hardware codes.
652 * Install the panic notifier when the display is first switched off.
653 */
654 if (hex == 0xffff) {
655 hex = 0xfff;
656 if (!notifier_installed) {
657 ++notifier_installed;
658 atomic_notifier_chain_register(&panic_notifier_list,
659 &ibm_statusled_block);
660 }
661 }
662 else
663 if (hex > 0xfff)
664 hex = 0xeff;
665
666 mb();
667 outw(hex, ibm_statusled_base);
668 }
669
670 static void __init
671 ibm_statusled_init(void)
672 {
673 /*
674 * The IBM 3-digit LED display is specified in the residual data
675 * as an operator panel device, type "System Status LED". Find
676 * that device and determine its address. We validate all the
677 * other parameters on the off-chance another, similar device
678 * exists.
679 */
680 if (have_residual_data) {
681 PPC_DEVICE *led;
682 PnP_TAG_PACKET *pkt;
683
684 led = residual_find_device(~0, NULL, SystemPeripheral,
685 OperatorPanel, SystemStatusLED, 0);
686 if (!led)
687 return;
688
689 pkt = PnP_find_packet((unsigned char *)
690 &res->DevicePnPHeap[led->AllocatedOffset], S8_Packet, 0);
691 if (!pkt)
692 return;
693
694 if (pkt->S8_Pack.IOInfo != ISAAddr16bit)
695 return;
696 if (*(unsigned short *)pkt->S8_Pack.RangeMin !=
697 *(unsigned short *)pkt->S8_Pack.RangeMax)
698 return;
699 if (pkt->S8_Pack.IOAlign != 2)
700 return;
701 if (pkt->S8_Pack.IONum != 2)
702 return;
703
704 ibm_statusled_base = ld_le16((unsigned short *)
705 (pkt->S8_Pack.RangeMin));
706 ppc_md.progress = ibm_statusled_progress;
707 }
708 }
709
710 static void __init
711 prep_setup_arch(void)
712 {
713 unsigned char reg;
714 int is_ide=0;
715
716 /* init to some ~sane value until calibrate_delay() runs */
717 loops_per_jiffy = 50000000;
718
719 /* Lookup PCI host bridges */
720 prep_find_bridges();
721
722 /* Set up floppy in PS/2 mode */
723 outb(0x09, SIO_CONFIG_RA);
724 reg = inb(SIO_CONFIG_RD);
725 reg = (reg & 0x3F) | 0x40;
726 outb(reg, SIO_CONFIG_RD);
727 outb(reg, SIO_CONFIG_RD); /* Have to write twice to change! */
728
729 switch ( _prep_type )
730 {
731 case _PREP_IBM:
732 reg = inb(PREP_IBM_PLANAR);
733 printk(KERN_INFO "IBM planar ID: %02x", reg);
734 switch (reg) {
735 case PREP_IBM_SANDALFOOT:
736 prep_gen_enable_l2();
737 setup_ibm_pci = prep_sandalfoot_setup_pci;
738 ppc_md.power_off = prep_sig750_poweroff;
739 ppc_md.show_cpuinfo = prep_sandalfoot_cpuinfo;
740 break;
741 case PREP_IBM_THINKPAD:
742 prep_gen_enable_l2();
743 setup_ibm_pci = prep_thinkpad_setup_pci;
744 ppc_md.power_off = prep_carrera_poweroff;
745 ppc_md.show_cpuinfo = prep_thinkpad_cpuinfo;
746 break;
747 default:
748 if (have_residual_data) {
749 prep_gen_enable_l2();
750 setup_ibm_pci = prep_residual_setup_pci;
751 ppc_md.power_off = prep_halt;
752 ppc_md.show_cpuinfo = prep_gen_cpuinfo;
753 break;
754 }
755 else
756 printk(" - unknown! Assuming Carolina");
757 /* fall through */
758 case PREP_IBM_CAROLINA_IDE_0:
759 case PREP_IBM_CAROLINA_IDE_1:
760 case PREP_IBM_CAROLINA_IDE_2:
761 case PREP_IBM_CAROLINA_IDE_3:
762 is_ide = 1;
763 case PREP_IBM_CAROLINA_SCSI_0:
764 case PREP_IBM_CAROLINA_SCSI_1:
765 case PREP_IBM_CAROLINA_SCSI_2:
766 case PREP_IBM_CAROLINA_SCSI_3:
767 prep_carolina_enable_l2();
768 setup_ibm_pci = prep_carolina_setup_pci;
769 ppc_md.power_off = prep_sig750_poweroff;
770 ppc_md.show_cpuinfo = prep_carolina_cpuinfo;
771 break;
772 case PREP_IBM_TIGER1_133:
773 case PREP_IBM_TIGER1_166:
774 case PREP_IBM_TIGER1_180:
775 case PREP_IBM_TIGER1_xxx:
776 case PREP_IBM_TIGER1_333:
777 prep_carolina_enable_l2();
778 setup_ibm_pci = prep_tiger1_setup_pci;
779 ppc_md.power_off = prep_sig750_poweroff;
780 ppc_md.show_cpuinfo = prep_tiger1_cpuinfo;
781 break;
782 }
783 printk("\n");
784
785 /* default root device */
786 if (is_ide)
787 ROOT_DEV = MKDEV(IDE0_MAJOR, 3);
788 else
789 ROOT_DEV = MKDEV(SCSI_DISK0_MAJOR, 3);
790
791 break;
792 case _PREP_Motorola:
793 prep_gen_enable_l2();
794 ppc_md.power_off = prep_halt;
795 ppc_md.show_cpuinfo = prep_mot_cpuinfo;
796
797 #ifdef CONFIG_BLK_DEV_INITRD
798 if (initrd_start)
799 ROOT_DEV = Root_RAM0;
800 else
801 #endif
802 #ifdef CONFIG_ROOT_NFS
803 ROOT_DEV = Root_NFS;
804 #else
805 ROOT_DEV = Root_SDA2;
806 #endif
807 break;
808 }
809
810 /* Read in NVRAM data */
811 init_prep_nvram();
812
813 /* if no bootargs, look in NVRAM */
814 if ( cmd_line[0] == '\0' ) {
815 char *bootargs;
816 bootargs = prep_nvram_get_var("bootargs");
817 if (bootargs != NULL) {
818 strcpy(cmd_line, bootargs);
819 /* again.. */
820 strcpy(boot_command_line, cmd_line);
821 }
822 }
823
824 prep_init_vesa();
825
826 switch (_prep_type) {
827 case _PREP_Motorola:
828 raven_init();
829 break;
830 case _PREP_IBM:
831 ibm_prep_init();
832 break;
833 }
834
835 #ifdef CONFIG_VGA_CONSOLE
836 /* vgacon.c needs to know where we mapped IO memory in io_block_mapping() */
837 vgacon_remap_base = 0xf0000000;
838 conswitchp = &vga_con;
839 #endif
840 }
841
842 /*
843 * First, see if we can get this information from the residual data.
844 * This is important on some IBM PReP systems. If we cannot, we let the
845 * TODC code handle doing this.
846 */
847 static void __init
848 prep_calibrate_decr(void)
849 {
850 if (have_residual_data) {
851 unsigned long freq, divisor = 4;
852
853 if ( res->VitalProductData.ProcessorBusHz ) {
854 freq = res->VitalProductData.ProcessorBusHz;
855 printk("time_init: decrementer frequency = %lu.%.6lu MHz\n",
856 (freq/divisor)/1000000,
857 (freq/divisor)%1000000);
858 tb_to_us = mulhwu_scale_factor(freq/divisor, 1000000);
859 tb_ticks_per_jiffy = freq / HZ / divisor;
860 }
861 }
862 else
863 todc_calibrate_decr();
864 }
865
866 static void __init
867 prep_init_IRQ(void)
868 {
869 unsigned int pci_viddid, pci_did;
870
871 if (OpenPIC_Addr != NULL) {
872 openpic_init(NUM_8259_INTERRUPTS);
873 /* We have a cascade on OpenPIC IRQ 0, Linux IRQ 16 */
874 openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
875 i8259_irq);
876 }
877
878 if (have_residual_data) {
879 i8259_init(residual_isapic_addr(), 0);
880 return;
881 }
882
883 /* If we have a Raven PCI bridge or a Hawk PCI bridge / Memory
884 * controller, we poll (as they have a different int-ack address). */
885 early_read_config_dword(NULL, 0, 0, PCI_VENDOR_ID, &pci_viddid);
886 pci_did = (pci_viddid & 0xffff0000) >> 16;
887 if (((pci_viddid & 0xffff) == PCI_VENDOR_ID_MOTOROLA)
888 && ((pci_did == PCI_DEVICE_ID_MOTOROLA_RAVEN)
889 || (pci_did == PCI_DEVICE_ID_MOTOROLA_HAWK)))
890 i8259_init(0, 0);
891 else
892 /* PCI interrupt ack address given in section 6.1.8 of the
893 * PReP specification. */
894 i8259_init(MPC10X_MAPA_PCI_INTACK_ADDR, 0);
895 }
896
897 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
898 /*
899 * IDE stuff.
900 */
901 static int
902 prep_ide_default_irq(unsigned long base)
903 {
904 switch (base) {
905 case 0x1f0: return 13;
906 case 0x170: return 13;
907 case 0x1e8: return 11;
908 case 0x168: return 10;
909 case 0xfff0: return 14; /* MCP(N)750 ide0 */
910 case 0xffe0: return 15; /* MCP(N)750 ide1 */
911 default: return 0;
912 }
913 }
914
915 static unsigned long
916 prep_ide_default_io_base(int index)
917 {
918 switch (index) {
919 case 0: return 0x1f0;
920 case 1: return 0x170;
921 case 2: return 0x1e8;
922 case 3: return 0x168;
923 default:
924 return 0;
925 }
926 }
927 #endif
928
929 #ifdef CONFIG_SMP
930 /* PReP (MTX) support */
931 static int __init
932 smp_prep_probe(void)
933 {
934 extern int mot_multi;
935
936 if (mot_multi) {
937 openpic_request_IPIs();
938 smp_hw_index[1] = 1;
939 return 2;
940 }
941
942 return 1;
943 }
944
945 static void __init
946 smp_prep_kick_cpu(int nr)
947 {
948 *(unsigned long *)KERNELBASE = nr;
949 asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
950 printk("CPU1 released, waiting\n");
951 }
952
953 static void __init
954 smp_prep_setup_cpu(int cpu_nr)
955 {
956 if (OpenPIC_Addr)
957 do_openpic_setup_cpu();
958 }
959
960 static struct smp_ops_t prep_smp_ops = {
961 smp_openpic_message_pass,
962 smp_prep_probe,
963 smp_prep_kick_cpu,
964 smp_prep_setup_cpu,
965 .give_timebase = smp_generic_give_timebase,
966 .take_timebase = smp_generic_take_timebase,
967 };
968 #endif /* CONFIG_SMP */
969
970 /*
971 * Setup the bat mappings we're going to load that cover
972 * the io areas. RAM was mapped by mapin_ram().
973 * -- Cort
974 */
975 static void __init
976 prep_map_io(void)
977 {
978 io_block_mapping(0x80000000, PREP_ISA_IO_BASE, 0x10000000, _PAGE_IO);
979 io_block_mapping(0xf0000000, PREP_ISA_MEM_BASE, 0x08000000, _PAGE_IO);
980 }
981
982 static int __init
983 prep_request_io(void)
984 {
985 #ifdef CONFIG_NVRAM
986 request_region(PREP_NVRAM_AS0, 0x8, "nvram");
987 #endif
988 request_region(0x00,0x20,"dma1");
989 request_region(0x40,0x20,"timer");
990 request_region(0x80,0x10,"dma page reg");
991 request_region(0xc0,0x20,"dma2");
992
993 return 0;
994 }
995
996 device_initcall(prep_request_io);
997
998 void __init
999 prep_init(unsigned long r3, unsigned long r4, unsigned long r5,
1000 unsigned long r6, unsigned long r7)
1001 {
1002 #ifdef CONFIG_PREP_RESIDUAL
1003 /* make a copy of residual data */
1004 if ( r3 ) {
1005 memcpy((void *)res,(void *)(r3+KERNELBASE),
1006 sizeof(RESIDUAL));
1007 }
1008 #endif
1009
1010 isa_io_base = PREP_ISA_IO_BASE;
1011 isa_mem_base = PREP_ISA_MEM_BASE;
1012 pci_dram_offset = PREP_PCI_DRAM_OFFSET;
1013 ISA_DMA_THRESHOLD = 0x00ffffff;
1014 DMA_MODE_READ = 0x44;
1015 DMA_MODE_WRITE = 0x48;
1016 ppc_do_canonicalize_irqs = 1;
1017
1018 /* figure out what kind of prep workstation we are */
1019 if (have_residual_data) {
1020 if ( !strncmp(res->VitalProductData.PrintableModel,"IBM",3) )
1021 _prep_type = _PREP_IBM;
1022 else
1023 _prep_type = _PREP_Motorola;
1024 }
1025 else {
1026 /* assume motorola if no residual (netboot?) */
1027 _prep_type = _PREP_Motorola;
1028 }
1029
1030 #ifdef CONFIG_PREP_RESIDUAL
1031 /* Switch off all residual data processing if the user requests it */
1032 if (strstr(cmd_line, "noresidual") != NULL)
1033 res = NULL;
1034 #endif
1035
1036 /* Initialise progress early to get maximum benefit */
1037 prep_set_bat();
1038 ibm_statusled_init();
1039
1040 ppc_md.setup_arch = prep_setup_arch;
1041 ppc_md.show_percpuinfo = prep_show_percpuinfo;
1042 ppc_md.show_cpuinfo = NULL; /* set in prep_setup_arch() */
1043 ppc_md.init_IRQ = prep_init_IRQ;
1044 /* this gets changed later on if we have an OpenPIC -- Cort */
1045 ppc_md.get_irq = i8259_irq;
1046
1047 ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
1048
1049 ppc_md.restart = prep_restart;
1050 ppc_md.power_off = NULL; /* set in prep_setup_arch() */
1051 ppc_md.halt = prep_halt;
1052
1053 ppc_md.nvram_read_val = prep_nvram_read_val;
1054 ppc_md.nvram_write_val = prep_nvram_write_val;
1055
1056 ppc_md.time_init = todc_time_init;
1057 if (_prep_type == _PREP_IBM) {
1058 ppc_md.rtc_read_val = todc_mc146818_read_val;
1059 ppc_md.rtc_write_val = todc_mc146818_write_val;
1060 TODC_INIT(TODC_TYPE_MC146818, RTC_PORT(0), NULL, RTC_PORT(1),
1061 8);
1062 } else {
1063 TODC_INIT(TODC_TYPE_MK48T59, PREP_NVRAM_AS0, PREP_NVRAM_AS1,
1064 PREP_NVRAM_DATA, 8);
1065 }
1066
1067 ppc_md.calibrate_decr = prep_calibrate_decr;
1068 ppc_md.set_rtc_time = todc_set_rtc_time;
1069 ppc_md.get_rtc_time = todc_get_rtc_time;
1070
1071 ppc_md.setup_io_mappings = prep_map_io;
1072
1073 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
1074 ppc_ide_md.default_irq = prep_ide_default_irq;
1075 ppc_ide_md.default_io_base = prep_ide_default_io_base;
1076 #endif
1077
1078 #ifdef CONFIG_SMP
1079 smp_ops = &prep_smp_ops;
1080 #endif /* CONFIG_SMP */
1081 }
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