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Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / arm / kernel / setup.c
blob7d6a516c0b9f4db182cc1a7d6b1df57b90331758
1 /*
2 * linux/arch/arm/kernel/setup.c
3 *
4 * Copyright (C) 1995-2001 Russell King
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/stddef.h>
13 #include <linux/ioport.h>
14 #include <linux/delay.h>
15 #include <linux/utsname.h>
16 #include <linux/initrd.h>
17 #include <linux/console.h>
18 #include <linux/bootmem.h>
19 #include <linux/seq_file.h>
20 #include <linux/tty.h>
21 #include <linux/init.h>
22 #include <linux/root_dev.h>
23 #include <linux/cpu.h>
24 #include <linux/interrupt.h>
25 #include <linux/smp.h>
26
27 #include <asm/cpu.h>
28 #include <asm/elf.h>
29 #include <asm/procinfo.h>
30 #include <asm/setup.h>
31 #include <asm/mach-types.h>
32 #include <asm/cacheflush.h>
33 #include <asm/tlbflush.h>
34
35 #include <asm/mach/arch.h>
36 #include <asm/mach/irq.h>
37 #include <asm/mach/time.h>
38
39 #include "compat.h"
40
41 #ifndef MEM_SIZE
42 #define MEM_SIZE (16*1024*1024)
43 #endif
44
45 #if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE)
46 char fpe_type[8];
47
48 static int __init fpe_setup(char *line)
49 {
50 memcpy(fpe_type, line, 8);
51 return 1;
52 }
53
54 __setup("fpe=", fpe_setup);
55 #endif
56
57 extern void paging_init(struct meminfo *, struct machine_desc *desc);
58 extern void reboot_setup(char *str);
59 extern int root_mountflags;
60 extern void _stext, _text, _etext, __data_start, _edata, _end;
61
62 unsigned int processor_id;
63 unsigned int __machine_arch_type;
64 EXPORT_SYMBOL(__machine_arch_type);
65
66 unsigned int system_rev;
67 EXPORT_SYMBOL(system_rev);
68
69 unsigned int system_serial_low;
70 EXPORT_SYMBOL(system_serial_low);
71
72 unsigned int system_serial_high;
73 EXPORT_SYMBOL(system_serial_high);
74
75 unsigned int elf_hwcap;
76 EXPORT_SYMBOL(elf_hwcap);
77
78
79 #ifdef MULTI_CPU
80 struct processor processor;
81 #endif
82 #ifdef MULTI_TLB
83 struct cpu_tlb_fns cpu_tlb;
84 #endif
85 #ifdef MULTI_USER
86 struct cpu_user_fns cpu_user;
87 #endif
88 #ifdef MULTI_CACHE
89 struct cpu_cache_fns cpu_cache;
90 #endif
91
92 struct stack {
93 u32 irq[3];
94 u32 abt[3];
95 u32 und[3];
96 } ____cacheline_aligned;
97
98 static struct stack stacks[NR_CPUS];
99
100 char elf_platform[ELF_PLATFORM_SIZE];
101 EXPORT_SYMBOL(elf_platform);
102
103 unsigned long phys_initrd_start __initdata = 0;
104 unsigned long phys_initrd_size __initdata = 0;
105
106 static struct meminfo meminfo __initdata = { 0, };
107 static const char *cpu_name;
108 static const char *machine_name;
109 static char command_line[COMMAND_LINE_SIZE];
110
111 static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
112 static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } };
113 #define ENDIANNESS ((char)endian_test.l)
114
115 DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data);
116
117 /*
118 * Standard memory resources
119 */
120 static struct resource mem_res[] = {
121 {
122 .name = "Video RAM",
123 .start = 0,
124 .end = 0,
125 .flags = IORESOURCE_MEM
126 },
127 {
128 .name = "Kernel text",
129 .start = 0,
130 .end = 0,
131 .flags = IORESOURCE_MEM
132 },
133 {
134 .name = "Kernel data",
135 .start = 0,
136 .end = 0,
137 .flags = IORESOURCE_MEM
138 }
139 };
140
141 #define video_ram mem_res[0]
142 #define kernel_code mem_res[1]
143 #define kernel_data mem_res[2]
144
145 static struct resource io_res[] = {
146 {
147 .name = "reserved",
148 .start = 0x3bc,
149 .end = 0x3be,
150 .flags = IORESOURCE_IO | IORESOURCE_BUSY
151 },
152 {
153 .name = "reserved",
154 .start = 0x378,
155 .end = 0x37f,
156 .flags = IORESOURCE_IO | IORESOURCE_BUSY
157 },
158 {
159 .name = "reserved",
160 .start = 0x278,
161 .end = 0x27f,
162 .flags = IORESOURCE_IO | IORESOURCE_BUSY
163 }
164 };
165
166 #define lp0 io_res[0]
167 #define lp1 io_res[1]
168 #define lp2 io_res[2]
169
170 static const char *cache_types[16] = {
171 "write-through",
172 "write-back",
173 "write-back",
174 "undefined 3",
175 "undefined 4",
176 "undefined 5",
177 "write-back",
178 "write-back",
179 "undefined 8",
180 "undefined 9",
181 "undefined 10",
182 "undefined 11",
183 "undefined 12",
184 "undefined 13",
185 "write-back",
186 "undefined 15",
187 };
188
189 static const char *cache_clean[16] = {
190 "not required",
191 "read-block",
192 "cp15 c7 ops",
193 "undefined 3",
194 "undefined 4",
195 "undefined 5",
196 "cp15 c7 ops",
197 "cp15 c7 ops",
198 "undefined 8",
199 "undefined 9",
200 "undefined 10",
201 "undefined 11",
202 "undefined 12",
203 "undefined 13",
204 "cp15 c7 ops",
205 "undefined 15",
206 };
207
208 static const char *cache_lockdown[16] = {
209 "not supported",
210 "not supported",
211 "not supported",
212 "undefined 3",
213 "undefined 4",
214 "undefined 5",
215 "format A",
216 "format B",
217 "undefined 8",
218 "undefined 9",
219 "undefined 10",
220 "undefined 11",
221 "undefined 12",
222 "undefined 13",
223 "format C",
224 "undefined 15",
225 };
226
227 static const char *proc_arch[] = {
228 "undefined/unknown",
229 "3",
230 "4",
231 "4T",
232 "5",
233 "5T",
234 "5TE",
235 "5TEJ",
236 "6TEJ",
237 "7",
238 "?(11)",
239 "?(12)",
240 "?(13)",
241 "?(14)",
242 "?(15)",
243 "?(16)",
244 "?(17)",
245 };
246
247 #define CACHE_TYPE(x) (((x) >> 25) & 15)
248 #define CACHE_S(x) ((x) & (1 << 24))
249 #define CACHE_DSIZE(x) (((x) >> 12) & 4095) /* only if S=1 */
250 #define CACHE_ISIZE(x) ((x) & 4095)
251
252 #define CACHE_SIZE(y) (((y) >> 6) & 7)
253 #define CACHE_ASSOC(y) (((y) >> 3) & 7)
254 #define CACHE_M(y) ((y) & (1 << 2))
255 #define CACHE_LINE(y) ((y) & 3)
256
257 static inline void dump_cache(const char *prefix, int cpu, unsigned int cache)
258 {
259 unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0);
260
261 printk("CPU%u: %s: %d bytes, associativity %d, %d byte lines, %d sets\n",
262 cpu, prefix,
263 mult << (8 + CACHE_SIZE(cache)),
264 (mult << CACHE_ASSOC(cache)) >> 1,
265 8 << CACHE_LINE(cache),
266 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) -
267 CACHE_LINE(cache)));
268 }
269
270 static void __init dump_cpu_info(int cpu)
271 {
272 unsigned int info = read_cpuid(CPUID_CACHETYPE);
273
274 if (info != processor_id) {
275 printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT",
276 cache_types[CACHE_TYPE(info)]);
277 if (CACHE_S(info)) {
278 dump_cache("I cache", cpu, CACHE_ISIZE(info));
279 dump_cache("D cache", cpu, CACHE_DSIZE(info));
280 } else {
281 dump_cache("cache", cpu, CACHE_ISIZE(info));
282 }
283 }
284
285 if (arch_is_coherent())
286 printk("Cache coherency enabled\n");
287 }
288
289 int cpu_architecture(void)
290 {
291 int cpu_arch;
292
293 if ((processor_id & 0x0008f000) == 0) {
294 cpu_arch = CPU_ARCH_UNKNOWN;
295 } else if ((processor_id & 0x0008f000) == 0x00007000) {
296 cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3;
297 } else if ((processor_id & 0x00080000) == 0x00000000) {
298 cpu_arch = (processor_id >> 16) & 7;
299 if (cpu_arch)
300 cpu_arch += CPU_ARCH_ARMv3;
301 } else {
302 /* the revised CPUID */
303 cpu_arch = ((processor_id >> 12) & 0xf) - 0xb + CPU_ARCH_ARMv6;
304 }
305
306 return cpu_arch;
307 }
308
309 /*
310 * These functions re-use the assembly code in head.S, which
311 * already provide the required functionality.
312 */
313 extern struct proc_info_list *lookup_processor_type(unsigned int);
314 extern struct machine_desc *lookup_machine_type(unsigned int);
315
316 static void __init setup_processor(void)
317 {
318 struct proc_info_list *list;
319
320 /*
321 * locate processor in the list of supported processor
322 * types. The linker builds this table for us from the
323 * entries in arch/arm/mm/proc-*.S
324 */
325 list = lookup_processor_type(processor_id);
326 if (!list) {
327 printk("CPU configuration botched (ID %08x), unable "
328 "to continue.\n", processor_id);
329 while (1);
330 }
331
332 cpu_name = list->cpu_name;
333
334 #ifdef MULTI_CPU
335 processor = *list->proc;
336 #endif
337 #ifdef MULTI_TLB
338 cpu_tlb = *list->tlb;
339 #endif
340 #ifdef MULTI_USER
341 cpu_user = *list->user;
342 #endif
343 #ifdef MULTI_CACHE
344 cpu_cache = *list->cache;
345 #endif
346
347 printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08x\n",
348 cpu_name, processor_id, (int)processor_id & 15,
349 proc_arch[cpu_architecture()], cr_alignment);
350
351 sprintf(system_utsname.machine, "%s%c", list->arch_name, ENDIANNESS);
352 sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS);
353 elf_hwcap = list->elf_hwcap;
354 #ifndef CONFIG_ARM_THUMB
355 elf_hwcap &= ~HWCAP_THUMB;
356 #endif
357 #ifndef CONFIG_VFP
358 elf_hwcap &= ~HWCAP_VFP;
359 #endif
360
361 cpu_proc_init();
362 }
363
364 /*
365 * cpu_init - initialise one CPU.
366 *
367 * cpu_init dumps the cache information, initialises SMP specific
368 * information, and sets up the per-CPU stacks.
369 */
370 void cpu_init(void)
371 {
372 unsigned int cpu = smp_processor_id();
373 struct stack *stk = &stacks[cpu];
374
375 if (cpu >= NR_CPUS) {
376 printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu);
377 BUG();
378 }
379
380 if (system_state == SYSTEM_BOOTING)
381 dump_cpu_info(cpu);
382
383 /*
384 * setup stacks for re-entrant exception handlers
385 */
386 __asm__ (
387 "msr cpsr_c, %1\n\t"
388 "add sp, %0, %2\n\t"
389 "msr cpsr_c, %3\n\t"
390 "add sp, %0, %4\n\t"
391 "msr cpsr_c, %5\n\t"
392 "add sp, %0, %6\n\t"
393 "msr cpsr_c, %7"
394 :
395 : "r" (stk),
396 "I" (PSR_F_BIT | PSR_I_BIT | IRQ_MODE),
397 "I" (offsetof(struct stack, irq[0])),
398 "I" (PSR_F_BIT | PSR_I_BIT | ABT_MODE),
399 "I" (offsetof(struct stack, abt[0])),
400 "I" (PSR_F_BIT | PSR_I_BIT | UND_MODE),
401 "I" (offsetof(struct stack, und[0])),
402 "I" (PSR_F_BIT | PSR_I_BIT | SVC_MODE)
403 : "r14");
404 }
405
406 static struct machine_desc * __init setup_machine(unsigned int nr)
407 {
408 struct machine_desc *list;
409
410 /*
411 * locate machine in the list of supported machines.
412 */
413 list = lookup_machine_type(nr);
414 if (!list) {
415 printk("Machine configuration botched (nr %d), unable "
416 "to continue.\n", nr);
417 while (1);
418 }
419
420 printk("Machine: %s\n", list->name);
421
422 return list;
423 }
424
425 static void __init early_initrd(char **p)
426 {
427 unsigned long start, size;
428
429 start = memparse(*p, p);
430 if (**p == ',') {
431 size = memparse((*p) + 1, p);
432
433 phys_initrd_start = start;
434 phys_initrd_size = size;
435 }
436 }
437 __early_param("initrd=", early_initrd);
438
439 static void __init arm_add_memory(unsigned long start, unsigned long size)
440 {
441 /*
442 * Ensure that start/size are aligned to a page boundary.
443 * Size is appropriately rounded down, start is rounded up.
444 */
445 size -= start & ~PAGE_MASK;
446
447 meminfo.bank[meminfo.nr_banks].start = PAGE_ALIGN(start);
448 meminfo.bank[meminfo.nr_banks].size = size & PAGE_MASK;
449 meminfo.bank[meminfo.nr_banks].node = PHYS_TO_NID(start);
450 meminfo.nr_banks += 1;
451 }
452
453 /*
454 * Pick out the memory size. We look for mem=size@start,
455 * where start and size are "size[KkMm]"
456 */
457 static void __init early_mem(char **p)
458 {
459 static int usermem __initdata = 0;
460 unsigned long size, start;
461
462 /*
463 * If the user specifies memory size, we
464 * blow away any automatically generated
465 * size.
466 */
467 if (usermem == 0) {
468 usermem = 1;
469 meminfo.nr_banks = 0;
470 }
471
472 start = PHYS_OFFSET;
473 size = memparse(*p, p);
474 if (**p == '@')
475 start = memparse(*p + 1, p);
476
477 arm_add_memory(start, size);
478 }
479 __early_param("mem=", early_mem);
480
481 /*
482 * Initial parsing of the command line.
483 */
484 static void __init parse_cmdline(char **cmdline_p, char *from)
485 {
486 char c = ' ', *to = command_line;
487 int len = 0;
488
489 for (;;) {
490 if (c == ' ') {
491 extern struct early_params __early_begin, __early_end;
492 struct early_params *p;
493
494 for (p = &__early_begin; p < &__early_end; p++) {
495 int len = strlen(p->arg);
496
497 if (memcmp(from, p->arg, len) == 0) {
498 if (to != command_line)
499 to -= 1;
500 from += len;
501 p->fn(&from);
502
503 while (*from != ' ' && *from != '\0')
504 from++;
505 break;
506 }
507 }
508 }
509 c = *from++;
510 if (!c)
511 break;
512 if (COMMAND_LINE_SIZE <= ++len)
513 break;
514 *to++ = c;
515 }
516 *to = '\0';
517 *cmdline_p = command_line;
518 }
519
520 static void __init
521 setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz)
522 {
523 #ifdef CONFIG_BLK_DEV_RAM
524 extern int rd_size, rd_image_start, rd_prompt, rd_doload;
525
526 rd_image_start = image_start;
527 rd_prompt = prompt;
528 rd_doload = doload;
529
530 if (rd_sz)
531 rd_size = rd_sz;
532 #endif
533 }
534
535 static void __init
536 request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc)
537 {
538 struct resource *res;
539 int i;
540
541 kernel_code.start = virt_to_phys(&_text);
542 kernel_code.end = virt_to_phys(&_etext - 1);
543 kernel_data.start = virt_to_phys(&__data_start);
544 kernel_data.end = virt_to_phys(&_end - 1);
545
546 for (i = 0; i < mi->nr_banks; i++) {
547 unsigned long virt_start, virt_end;
548
549 if (mi->bank[i].size == 0)
550 continue;
551
552 virt_start = __phys_to_virt(mi->bank[i].start);
553 virt_end = virt_start + mi->bank[i].size - 1;
554
555 res = alloc_bootmem_low(sizeof(*res));
556 res->name = "System RAM";
557 res->start = __virt_to_phys(virt_start);
558 res->end = __virt_to_phys(virt_end);
559 res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
560
561 request_resource(&iomem_resource, res);
562
563 if (kernel_code.start >= res->start &&
564 kernel_code.end <= res->end)
565 request_resource(res, &kernel_code);
566 if (kernel_data.start >= res->start &&
567 kernel_data.end <= res->end)
568 request_resource(res, &kernel_data);
569 }
570
571 if (mdesc->video_start) {
572 video_ram.start = mdesc->video_start;
573 video_ram.end = mdesc->video_end;
574 request_resource(&iomem_resource, &video_ram);
575 }
576
577 /*
578 * Some machines don't have the possibility of ever
579 * possessing lp0, lp1 or lp2
580 */
581 if (mdesc->reserve_lp0)
582 request_resource(&ioport_resource, &lp0);
583 if (mdesc->reserve_lp1)
584 request_resource(&ioport_resource, &lp1);
585 if (mdesc->reserve_lp2)
586 request_resource(&ioport_resource, &lp2);
587 }
588
589 /*
590 * Tag parsing.
591 *
592 * This is the new way of passing data to the kernel at boot time. Rather
593 * than passing a fixed inflexible structure to the kernel, we pass a list
594 * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE
595 * tag for the list to be recognised (to distinguish the tagged list from
596 * a param_struct). The list is terminated with a zero-length tag (this tag
597 * is not parsed in any way).
598 */
599 static int __init parse_tag_core(const struct tag *tag)
600 {
601 if (tag->hdr.size > 2) {
602 if ((tag->u.core.flags & 1) == 0)
603 root_mountflags &= ~MS_RDONLY;
604 ROOT_DEV = old_decode_dev(tag->u.core.rootdev);
605 }
606 return 0;
607 }
608
609 __tagtable(ATAG_CORE, parse_tag_core);
610
611 static int __init parse_tag_mem32(const struct tag *tag)
612 {
613 if (meminfo.nr_banks >= NR_BANKS) {
614 printk(KERN_WARNING
615 "Ignoring memory bank 0x%08x size %dKB\n",
616 tag->u.mem.start, tag->u.mem.size / 1024);
617 return -EINVAL;
618 }
619 arm_add_memory(tag->u.mem.start, tag->u.mem.size);
620 return 0;
621 }
622
623 __tagtable(ATAG_MEM, parse_tag_mem32);
624
625 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
626 struct screen_info screen_info = {
627 .orig_video_lines = 30,
628 .orig_video_cols = 80,
629 .orig_video_mode = 0,
630 .orig_video_ega_bx = 0,
631 .orig_video_isVGA = 1,
632 .orig_video_points = 8
633 };
634
635 static int __init parse_tag_videotext(const struct tag *tag)
636 {
637 screen_info.orig_x = tag->u.videotext.x;
638 screen_info.orig_y = tag->u.videotext.y;
639 screen_info.orig_video_page = tag->u.videotext.video_page;
640 screen_info.orig_video_mode = tag->u.videotext.video_mode;
641 screen_info.orig_video_cols = tag->u.videotext.video_cols;
642 screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx;
643 screen_info.orig_video_lines = tag->u.videotext.video_lines;
644 screen_info.orig_video_isVGA = tag->u.videotext.video_isvga;
645 screen_info.orig_video_points = tag->u.videotext.video_points;
646 return 0;
647 }
648
649 __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext);
650 #endif
651
652 static int __init parse_tag_ramdisk(const struct tag *tag)
653 {
654 setup_ramdisk((tag->u.ramdisk.flags & 1) == 0,
655 (tag->u.ramdisk.flags & 2) == 0,
656 tag->u.ramdisk.start, tag->u.ramdisk.size);
657 return 0;
658 }
659
660 __tagtable(ATAG_RAMDISK, parse_tag_ramdisk);
661
662 static int __init parse_tag_initrd(const struct tag *tag)
663 {
664 printk(KERN_WARNING "ATAG_INITRD is deprecated; "
665 "please update your bootloader.\n");
666 phys_initrd_start = __virt_to_phys(tag->u.initrd.start);
667 phys_initrd_size = tag->u.initrd.size;
668 return 0;
669 }
670
671 __tagtable(ATAG_INITRD, parse_tag_initrd);
672
673 static int __init parse_tag_initrd2(const struct tag *tag)
674 {
675 phys_initrd_start = tag->u.initrd.start;
676 phys_initrd_size = tag->u.initrd.size;
677 return 0;
678 }
679
680 __tagtable(ATAG_INITRD2, parse_tag_initrd2);
681
682 static int __init parse_tag_serialnr(const struct tag *tag)
683 {
684 system_serial_low = tag->u.serialnr.low;
685 system_serial_high = tag->u.serialnr.high;
686 return 0;
687 }
688
689 __tagtable(ATAG_SERIAL, parse_tag_serialnr);
690
691 static int __init parse_tag_revision(const struct tag *tag)
692 {
693 system_rev = tag->u.revision.rev;
694 return 0;
695 }
696
697 __tagtable(ATAG_REVISION, parse_tag_revision);
698
699 static int __init parse_tag_cmdline(const struct tag *tag)
700 {
701 strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
702 return 0;
703 }
704
705 __tagtable(ATAG_CMDLINE, parse_tag_cmdline);
706
707 /*
708 * Scan the tag table for this tag, and call its parse function.
709 * The tag table is built by the linker from all the __tagtable
710 * declarations.
711 */
712 static int __init parse_tag(const struct tag *tag)
713 {
714 extern struct tagtable __tagtable_begin, __tagtable_end;
715 struct tagtable *t;
716
717 for (t = &__tagtable_begin; t < &__tagtable_end; t++)
718 if (tag->hdr.tag == t->tag) {
719 t->parse(tag);
720 break;
721 }
722
723 return t < &__tagtable_end;
724 }
725
726 /*
727 * Parse all tags in the list, checking both the global and architecture
728 * specific tag tables.
729 */
730 static void __init parse_tags(const struct tag *t)
731 {
732 for (; t->hdr.size; t = tag_next(t))
733 if (!parse_tag(t))
734 printk(KERN_WARNING
735 "Ignoring unrecognised tag 0x%08x\n",
736 t->hdr.tag);
737 }
738
739 /*
740 * This holds our defaults.
741 */
742 static struct init_tags {
743 struct tag_header hdr1;
744 struct tag_core core;
745 struct tag_header hdr2;
746 struct tag_mem32 mem;
747 struct tag_header hdr3;
748 } init_tags __initdata = {
749 { tag_size(tag_core), ATAG_CORE },
750 { 1, PAGE_SIZE, 0xff },
751 { tag_size(tag_mem32), ATAG_MEM },
752 { MEM_SIZE, PHYS_OFFSET },
753 { 0, ATAG_NONE }
754 };
755
756 static void (*init_machine)(void) __initdata;
757
758 static int __init customize_machine(void)
759 {
760 /* customizes platform devices, or adds new ones */
761 if (init_machine)
762 init_machine();
763 return 0;
764 }
765 arch_initcall(customize_machine);
766
767 void __init setup_arch(char **cmdline_p)
768 {
769 struct tag *tags = (struct tag *)&init_tags;
770 struct machine_desc *mdesc;
771 char *from = default_command_line;
772
773 setup_processor();
774 mdesc = setup_machine(machine_arch_type);
775 machine_name = mdesc->name;
776
777 if (mdesc->soft_reboot)
778 reboot_setup("s");
779
780 if (mdesc->boot_params)
781 tags = phys_to_virt(mdesc->boot_params);
782
783 /*
784 * If we have the old style parameters, convert them to
785 * a tag list.
786 */
787 if (tags->hdr.tag != ATAG_CORE)
788 convert_to_tag_list(tags);
789 if (tags->hdr.tag != ATAG_CORE)
790 tags = (struct tag *)&init_tags;
791
792 if (mdesc->fixup)
793 mdesc->fixup(mdesc, tags, &from, &meminfo);
794
795 if (tags->hdr.tag == ATAG_CORE) {
796 if (meminfo.nr_banks != 0)
797 squash_mem_tags(tags);
798 parse_tags(tags);
799 }
800
801 init_mm.start_code = (unsigned long) &_text;
802 init_mm.end_code = (unsigned long) &_etext;
803 init_mm.end_data = (unsigned long) &_edata;
804 init_mm.brk = (unsigned long) &_end;
805
806 memcpy(saved_command_line, from, COMMAND_LINE_SIZE);
807 saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
808 parse_cmdline(cmdline_p, from);
809 paging_init(&meminfo, mdesc);
810 request_standard_resources(&meminfo, mdesc);
811
812 #ifdef CONFIG_SMP
813 smp_init_cpus();
814 #endif
815
816 cpu_init();
817
818 /*
819 * Set up various architecture-specific pointers
820 */
821 init_arch_irq = mdesc->init_irq;
822 system_timer = mdesc->timer;
823 init_machine = mdesc->init_machine;
824
825 #ifdef CONFIG_VT
826 #if defined(CONFIG_VGA_CONSOLE)
827 conswitchp = &vga_con;
828 #elif defined(CONFIG_DUMMY_CONSOLE)
829 conswitchp = &dummy_con;
830 #endif
831 #endif
832 }
833
834
835 static int __init topology_init(void)
836 {
837 int cpu;
838
839 for_each_possible_cpu(cpu)
840 register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu);
841
842 return 0;
843 }
844
845 subsys_initcall(topology_init);
846
847 static const char *hwcap_str[] = {
848 "swp",
849 "half",
850 "thumb",
851 "26bit",
852 "fastmult",
853 "fpa",
854 "vfp",
855 "edsp",
856 "java",
857 NULL
858 };
859
860 static void
861 c_show_cache(struct seq_file *m, const char *type, unsigned int cache)
862 {
863 unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0);
864
865 seq_printf(m, "%s size\t\t: %d\n"
866 "%s assoc\t\t: %d\n"
867 "%s line length\t: %d\n"
868 "%s sets\t\t: %d\n",
869 type, mult << (8 + CACHE_SIZE(cache)),
870 type, (mult << CACHE_ASSOC(cache)) >> 1,
871 type, 8 << CACHE_LINE(cache),
872 type, 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) -
873 CACHE_LINE(cache)));
874 }
875
876 static int c_show(struct seq_file *m, void *v)
877 {
878 int i;
879
880 seq_printf(m, "Processor\t: %s rev %d (%s)\n",
881 cpu_name, (int)processor_id & 15, elf_platform);
882
883 #if defined(CONFIG_SMP)
884 for_each_online_cpu(i) {
885 /*
886 * glibc reads /proc/cpuinfo to determine the number of
887 * online processors, looking for lines beginning with
888 * "processor". Give glibc what it expects.
889 */
890 seq_printf(m, "processor\t: %d\n", i);
891 seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n",
892 per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ),
893 (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100);
894 }
895 #else /* CONFIG_SMP */
896 seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
897 loops_per_jiffy / (500000/HZ),
898 (loops_per_jiffy / (5000/HZ)) % 100);
899 #endif
900
901 /* dump out the processor features */
902 seq_puts(m, "Features\t: ");
903
904 for (i = 0; hwcap_str[i]; i++)
905 if (elf_hwcap & (1 << i))
906 seq_printf(m, "%s ", hwcap_str[i]);
907
908 seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24);
909 seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]);
910
911 if ((processor_id & 0x0008f000) == 0x00000000) {
912 /* pre-ARM7 */
913 seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4);
914 } else {
915 if ((processor_id & 0x0008f000) == 0x00007000) {
916 /* ARM7 */
917 seq_printf(m, "CPU variant\t: 0x%02x\n",
918 (processor_id >> 16) & 127);
919 } else {
920 /* post-ARM7 */
921 seq_printf(m, "CPU variant\t: 0x%x\n",
922 (processor_id >> 20) & 15);
923 }
924 seq_printf(m, "CPU part\t: 0x%03x\n",
925 (processor_id >> 4) & 0xfff);
926 }
927 seq_printf(m, "CPU revision\t: %d\n", processor_id & 15);
928
929 {
930 unsigned int cache_info = read_cpuid(CPUID_CACHETYPE);
931 if (cache_info != processor_id) {
932 seq_printf(m, "Cache type\t: %s\n"
933 "Cache clean\t: %s\n"
934 "Cache lockdown\t: %s\n"
935 "Cache format\t: %s\n",
936 cache_types[CACHE_TYPE(cache_info)],
937 cache_clean[CACHE_TYPE(cache_info)],
938 cache_lockdown[CACHE_TYPE(cache_info)],
939 CACHE_S(cache_info) ? "Harvard" : "Unified");
940
941 if (CACHE_S(cache_info)) {
942 c_show_cache(m, "I", CACHE_ISIZE(cache_info));
943 c_show_cache(m, "D", CACHE_DSIZE(cache_info));
944 } else {
945 c_show_cache(m, "Cache", CACHE_ISIZE(cache_info));
946 }
947 }
948 }
949
950 seq_puts(m, "\n");
951
952 seq_printf(m, "Hardware\t: %s\n", machine_name);
953 seq_printf(m, "Revision\t: %04x\n", system_rev);
954 seq_printf(m, "Serial\t\t: %08x%08x\n",
955 system_serial_high, system_serial_low);
956
957 return 0;
958 }
959
960 static void *c_start(struct seq_file *m, loff_t *pos)
961 {
962 return *pos < 1 ? (void *)1 : NULL;
963 }
964
965 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
966 {
967 ++*pos;
968 return NULL;
969 }
970
971 static void c_stop(struct seq_file *m, void *v)
972 {
973 }
974
975 struct seq_operations cpuinfo_op = {
976 .start = c_start,
977 .next = c_next,
978 .stop = c_stop,
979 .show = c_show
980 };
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree