blob: b7b0720bc1bbe8295ea3ca7b2849e4a5ad875bf2 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#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>
Jon Smirl894673e2006-07-10 04:44:13 -070020#include <linux/screen_info.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/init.h>
22#include <linux/root_dev.h>
23#include <linux/cpu.h>
24#include <linux/interrupt.h>
Russell King7bbb7942006-02-16 11:08:09 +000025#include <linux/smp.h>
Alexey Dobriyan4e950f62007-07-30 02:36:13 +040026#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
28#include <asm/cpu.h>
29#include <asm/elf.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <asm/procinfo.h>
31#include <asm/setup.h>
32#include <asm/mach-types.h>
33#include <asm/cacheflush.h>
34#include <asm/tlbflush.h>
35
36#include <asm/mach/arch.h>
37#include <asm/mach/irq.h>
38#include <asm/mach/time.h>
39
Ben Dooks0fc1c832006-03-15 23:17:30 +000040#include "compat.h"
Richard Purdie4cd9d6f2008-01-02 00:56:46 +010041#include "atags.h"
Ben Dooks0fc1c832006-03-15 23:17:30 +000042
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#ifndef MEM_SIZE
44#define MEM_SIZE (16*1024*1024)
45#endif
46
47#if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE)
48char fpe_type[8];
49
50static int __init fpe_setup(char *line)
51{
52 memcpy(fpe_type, line, 8);
53 return 1;
54}
55
56__setup("fpe=", fpe_setup);
57#endif
58
Linus Torvalds1da177e2005-04-16 15:20:36 -070059extern void paging_init(struct meminfo *, struct machine_desc *desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060extern void reboot_setup(char *str);
61extern int root_mountflags;
62extern void _stext, _text, _etext, __data_start, _edata, _end;
63
64unsigned int processor_id;
Krzysztof Halasac18f6582007-12-18 03:53:27 +010065EXPORT_SYMBOL(processor_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066unsigned int __machine_arch_type;
67EXPORT_SYMBOL(__machine_arch_type);
68
Bill Gatliff9d20fdd2007-05-31 22:02:22 +010069unsigned int __atags_pointer __initdata;
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071unsigned int system_rev;
72EXPORT_SYMBOL(system_rev);
73
74unsigned int system_serial_low;
75EXPORT_SYMBOL(system_serial_low);
76
77unsigned int system_serial_high;
78EXPORT_SYMBOL(system_serial_high);
79
80unsigned int elf_hwcap;
81EXPORT_SYMBOL(elf_hwcap);
82
83
84#ifdef MULTI_CPU
85struct processor processor;
86#endif
87#ifdef MULTI_TLB
88struct cpu_tlb_fns cpu_tlb;
89#endif
90#ifdef MULTI_USER
91struct cpu_user_fns cpu_user;
92#endif
93#ifdef MULTI_CACHE
94struct cpu_cache_fns cpu_cache;
95#endif
Catalin Marinas953233d2007-02-05 14:48:08 +010096#ifdef CONFIG_OUTER_CACHE
97struct outer_cache_fns outer_cache;
98#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Russell Kingccea7a12005-05-31 22:22:32 +0100100struct stack {
101 u32 irq[3];
102 u32 abt[3];
103 u32 und[3];
104} ____cacheline_aligned;
105
106static struct stack stacks[NR_CPUS];
107
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108char elf_platform[ELF_PLATFORM_SIZE];
109EXPORT_SYMBOL(elf_platform);
110
111unsigned long phys_initrd_start __initdata = 0;
112unsigned long phys_initrd_size __initdata = 0;
113
114static struct meminfo meminfo __initdata = { 0, };
115static const char *cpu_name;
116static const char *machine_name;
Alon Bar-Levcd818992007-02-12 00:54:06 -0800117static char __initdata command_line[COMMAND_LINE_SIZE];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
119static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
120static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } };
121#define ENDIANNESS ((char)endian_test.l)
122
123DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data);
124
125/*
126 * Standard memory resources
127 */
128static struct resource mem_res[] = {
Greg Kroah-Hartman740e5182006-06-12 14:47:06 -0700129 {
130 .name = "Video RAM",
131 .start = 0,
132 .end = 0,
133 .flags = IORESOURCE_MEM
134 },
135 {
136 .name = "Kernel text",
137 .start = 0,
138 .end = 0,
139 .flags = IORESOURCE_MEM
140 },
141 {
142 .name = "Kernel data",
143 .start = 0,
144 .end = 0,
145 .flags = IORESOURCE_MEM
146 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147};
148
149#define video_ram mem_res[0]
150#define kernel_code mem_res[1]
151#define kernel_data mem_res[2]
152
153static struct resource io_res[] = {
Greg Kroah-Hartman740e5182006-06-12 14:47:06 -0700154 {
155 .name = "reserved",
156 .start = 0x3bc,
157 .end = 0x3be,
158 .flags = IORESOURCE_IO | IORESOURCE_BUSY
159 },
160 {
161 .name = "reserved",
162 .start = 0x378,
163 .end = 0x37f,
164 .flags = IORESOURCE_IO | IORESOURCE_BUSY
165 },
166 {
167 .name = "reserved",
168 .start = 0x278,
169 .end = 0x27f,
170 .flags = IORESOURCE_IO | IORESOURCE_BUSY
171 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172};
173
174#define lp0 io_res[0]
175#define lp1 io_res[1]
176#define lp2 io_res[2]
177
178static const char *cache_types[16] = {
179 "write-through",
180 "write-back",
181 "write-back",
182 "undefined 3",
183 "undefined 4",
184 "undefined 5",
185 "write-back",
186 "write-back",
187 "undefined 8",
188 "undefined 9",
189 "undefined 10",
190 "undefined 11",
191 "undefined 12",
192 "undefined 13",
193 "write-back",
194 "undefined 15",
195};
196
197static const char *cache_clean[16] = {
198 "not required",
199 "read-block",
200 "cp15 c7 ops",
201 "undefined 3",
202 "undefined 4",
203 "undefined 5",
204 "cp15 c7 ops",
205 "cp15 c7 ops",
206 "undefined 8",
207 "undefined 9",
208 "undefined 10",
209 "undefined 11",
210 "undefined 12",
211 "undefined 13",
212 "cp15 c7 ops",
213 "undefined 15",
214};
215
216static const char *cache_lockdown[16] = {
217 "not supported",
218 "not supported",
219 "not supported",
220 "undefined 3",
221 "undefined 4",
222 "undefined 5",
223 "format A",
224 "format B",
225 "undefined 8",
226 "undefined 9",
227 "undefined 10",
228 "undefined 11",
229 "undefined 12",
230 "undefined 13",
231 "format C",
232 "undefined 15",
233};
234
235static const char *proc_arch[] = {
236 "undefined/unknown",
237 "3",
238 "4",
239 "4T",
240 "5",
241 "5T",
242 "5TE",
243 "5TEJ",
244 "6TEJ",
Catalin Marinas6b090a22006-01-12 16:28:16 +0000245 "7",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 "?(11)",
247 "?(12)",
248 "?(13)",
249 "?(14)",
250 "?(15)",
251 "?(16)",
252 "?(17)",
253};
254
255#define CACHE_TYPE(x) (((x) >> 25) & 15)
256#define CACHE_S(x) ((x) & (1 << 24))
257#define CACHE_DSIZE(x) (((x) >> 12) & 4095) /* only if S=1 */
258#define CACHE_ISIZE(x) ((x) & 4095)
259
260#define CACHE_SIZE(y) (((y) >> 6) & 7)
261#define CACHE_ASSOC(y) (((y) >> 3) & 7)
262#define CACHE_M(y) ((y) & (1 << 2))
263#define CACHE_LINE(y) ((y) & 3)
264
265static inline void dump_cache(const char *prefix, int cpu, unsigned int cache)
266{
267 unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0);
268
269 printk("CPU%u: %s: %d bytes, associativity %d, %d byte lines, %d sets\n",
270 cpu, prefix,
271 mult << (8 + CACHE_SIZE(cache)),
272 (mult << CACHE_ASSOC(cache)) >> 1,
273 8 << CACHE_LINE(cache),
274 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) -
275 CACHE_LINE(cache)));
276}
277
278static void __init dump_cpu_info(int cpu)
279{
280 unsigned int info = read_cpuid(CPUID_CACHETYPE);
281
282 if (info != processor_id) {
283 printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT",
284 cache_types[CACHE_TYPE(info)]);
285 if (CACHE_S(info)) {
286 dump_cache("I cache", cpu, CACHE_ISIZE(info));
287 dump_cache("D cache", cpu, CACHE_DSIZE(info));
288 } else {
289 dump_cache("cache", cpu, CACHE_ISIZE(info));
290 }
291 }
Lennert Buytenhek23759dc2006-04-02 00:07:39 +0100292
293 if (arch_is_coherent())
294 printk("Cache coherency enabled\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295}
296
297int cpu_architecture(void)
298{
299 int cpu_arch;
300
Catalin Marinas6b090a22006-01-12 16:28:16 +0000301 if ((processor_id & 0x0008f000) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 cpu_arch = CPU_ARCH_UNKNOWN;
Catalin Marinas6b090a22006-01-12 16:28:16 +0000303 } else if ((processor_id & 0x0008f000) == 0x00007000) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3;
Catalin Marinas6b090a22006-01-12 16:28:16 +0000305 } else if ((processor_id & 0x00080000) == 0x00000000) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 cpu_arch = (processor_id >> 16) & 7;
307 if (cpu_arch)
308 cpu_arch += CPU_ARCH_ARMv3;
Catalin Marinas180005c2007-09-25 16:49:45 +0100309 } else if ((processor_id & 0x000f0000) == 0x000f0000) {
310 unsigned int mmfr0;
311
312 /* Revised CPUID format. Read the Memory Model Feature
313 * Register 0 and check for VMSAv7 or PMSAv7 */
314 asm("mrc p15, 0, %0, c0, c1, 4"
315 : "=r" (mmfr0));
316 if ((mmfr0 & 0x0000000f) == 0x00000003 ||
317 (mmfr0 & 0x000000f0) == 0x00000030)
318 cpu_arch = CPU_ARCH_ARMv7;
319 else if ((mmfr0 & 0x0000000f) == 0x00000002 ||
320 (mmfr0 & 0x000000f0) == 0x00000020)
321 cpu_arch = CPU_ARCH_ARMv6;
322 else
323 cpu_arch = CPU_ARCH_UNKNOWN;
324 } else
325 cpu_arch = CPU_ARCH_UNKNOWN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
327 return cpu_arch;
328}
329
330/*
331 * These functions re-use the assembly code in head.S, which
332 * already provide the required functionality.
333 */
Russell King0f44ba12006-02-24 21:04:56 +0000334extern struct proc_info_list *lookup_processor_type(unsigned int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335extern struct machine_desc *lookup_machine_type(unsigned int);
336
337static void __init setup_processor(void)
338{
339 struct proc_info_list *list;
340
341 /*
342 * locate processor in the list of supported processor
343 * types. The linker builds this table for us from the
344 * entries in arch/arm/mm/proc-*.S
345 */
Russell King0f44ba12006-02-24 21:04:56 +0000346 list = lookup_processor_type(processor_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 if (!list) {
348 printk("CPU configuration botched (ID %08x), unable "
349 "to continue.\n", processor_id);
350 while (1);
351 }
352
353 cpu_name = list->cpu_name;
354
355#ifdef MULTI_CPU
356 processor = *list->proc;
357#endif
358#ifdef MULTI_TLB
359 cpu_tlb = *list->tlb;
360#endif
361#ifdef MULTI_USER
362 cpu_user = *list->user;
363#endif
364#ifdef MULTI_CACHE
365 cpu_cache = *list->cache;
366#endif
367
Russell King4e190252006-07-03 13:29:38 +0100368 printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 cpu_name, processor_id, (int)processor_id & 15,
Russell King264edb32006-06-29 15:03:09 +0100370 proc_arch[cpu_architecture()], cr_alignment);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
Serge E. Hallyn96b644b2006-10-02 02:18:13 -0700372 sprintf(init_utsname()->machine, "%s%c", list->arch_name, ENDIANNESS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS);
374 elf_hwcap = list->elf_hwcap;
Catalin Marinasadeff422006-04-10 21:32:35 +0100375#ifndef CONFIG_ARM_THUMB
376 elf_hwcap &= ~HWCAP_THUMB;
377#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
379 cpu_proc_init();
380}
381
Russell Kingccea7a12005-05-31 22:22:32 +0100382/*
383 * cpu_init - initialise one CPU.
384 *
385 * cpu_init dumps the cache information, initialises SMP specific
386 * information, and sets up the per-CPU stacks.
387 */
Russell King36c5ed22005-06-19 18:39:33 +0100388void cpu_init(void)
Russell Kingccea7a12005-05-31 22:22:32 +0100389{
390 unsigned int cpu = smp_processor_id();
391 struct stack *stk = &stacks[cpu];
392
393 if (cpu >= NR_CPUS) {
394 printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu);
395 BUG();
396 }
397
Russell King32f8b972005-11-06 19:49:21 +0000398 if (system_state == SYSTEM_BOOTING)
399 dump_cpu_info(cpu);
Russell Kingccea7a12005-05-31 22:22:32 +0100400
401 /*
402 * setup stacks for re-entrant exception handlers
403 */
404 __asm__ (
405 "msr cpsr_c, %1\n\t"
406 "add sp, %0, %2\n\t"
407 "msr cpsr_c, %3\n\t"
408 "add sp, %0, %4\n\t"
409 "msr cpsr_c, %5\n\t"
410 "add sp, %0, %6\n\t"
411 "msr cpsr_c, %7"
412 :
413 : "r" (stk),
414 "I" (PSR_F_BIT | PSR_I_BIT | IRQ_MODE),
415 "I" (offsetof(struct stack, irq[0])),
416 "I" (PSR_F_BIT | PSR_I_BIT | ABT_MODE),
417 "I" (offsetof(struct stack, abt[0])),
418 "I" (PSR_F_BIT | PSR_I_BIT | UND_MODE),
419 "I" (offsetof(struct stack, und[0])),
Catalin Marinasaaaa3f92005-06-29 15:34:39 +0100420 "I" (PSR_F_BIT | PSR_I_BIT | SVC_MODE)
421 : "r14");
Russell Kingccea7a12005-05-31 22:22:32 +0100422}
423
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424static struct machine_desc * __init setup_machine(unsigned int nr)
425{
426 struct machine_desc *list;
427
428 /*
429 * locate machine in the list of supported machines.
430 */
431 list = lookup_machine_type(nr);
432 if (!list) {
433 printk("Machine configuration botched (nr %d), unable "
434 "to continue.\n", nr);
435 while (1);
436 }
437
438 printk("Machine: %s\n", list->name);
439
440 return list;
441}
442
443static void __init early_initrd(char **p)
444{
445 unsigned long start, size;
446
447 start = memparse(*p, p);
448 if (**p == ',') {
449 size = memparse((*p) + 1, p);
450
451 phys_initrd_start = start;
452 phys_initrd_size = size;
453 }
454}
455__early_param("initrd=", early_initrd);
456
Andrew Morton1c97b732006-04-20 21:41:18 +0100457static void __init arm_add_memory(unsigned long start, unsigned long size)
Russell King3a669412005-06-22 21:43:10 +0100458{
Russell King05f96ef2006-11-30 20:44:49 +0000459 struct membank *bank;
460
Russell King3a669412005-06-22 21:43:10 +0100461 /*
462 * Ensure that start/size are aligned to a page boundary.
463 * Size is appropriately rounded down, start is rounded up.
464 */
465 size -= start & ~PAGE_MASK;
466
Russell King05f96ef2006-11-30 20:44:49 +0000467 bank = &meminfo.bank[meminfo.nr_banks++];
468
469 bank->start = PAGE_ALIGN(start);
470 bank->size = size & PAGE_MASK;
471 bank->node = PHYS_TO_NID(start);
Russell King3a669412005-06-22 21:43:10 +0100472}
473
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474/*
475 * Pick out the memory size. We look for mem=size@start,
476 * where start and size are "size[KkMm]"
477 */
478static void __init early_mem(char **p)
479{
480 static int usermem __initdata = 0;
481 unsigned long size, start;
482
483 /*
484 * If the user specifies memory size, we
485 * blow away any automatically generated
486 * size.
487 */
488 if (usermem == 0) {
489 usermem = 1;
490 meminfo.nr_banks = 0;
491 }
492
493 start = PHYS_OFFSET;
494 size = memparse(*p, p);
495 if (**p == '@')
496 start = memparse(*p + 1, p);
497
Andrew Morton1c97b732006-04-20 21:41:18 +0100498 arm_add_memory(start, size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499}
500__early_param("mem=", early_mem);
501
502/*
503 * Initial parsing of the command line.
504 */
505static void __init parse_cmdline(char **cmdline_p, char *from)
506{
507 char c = ' ', *to = command_line;
508 int len = 0;
509
510 for (;;) {
511 if (c == ' ') {
512 extern struct early_params __early_begin, __early_end;
513 struct early_params *p;
514
515 for (p = &__early_begin; p < &__early_end; p++) {
516 int len = strlen(p->arg);
517
518 if (memcmp(from, p->arg, len) == 0) {
519 if (to != command_line)
520 to -= 1;
521 from += len;
522 p->fn(&from);
523
524 while (*from != ' ' && *from != '\0')
525 from++;
526 break;
527 }
528 }
529 }
530 c = *from++;
531 if (!c)
532 break;
533 if (COMMAND_LINE_SIZE <= ++len)
534 break;
535 *to++ = c;
536 }
537 *to = '\0';
538 *cmdline_p = command_line;
539}
540
541static void __init
542setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz)
543{
544#ifdef CONFIG_BLK_DEV_RAM
545 extern int rd_size, rd_image_start, rd_prompt, rd_doload;
546
547 rd_image_start = image_start;
548 rd_prompt = prompt;
549 rd_doload = doload;
550
551 if (rd_sz)
552 rd_size = rd_sz;
553#endif
554}
555
556static void __init
557request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc)
558{
559 struct resource *res;
560 int i;
561
562 kernel_code.start = virt_to_phys(&_text);
563 kernel_code.end = virt_to_phys(&_etext - 1);
564 kernel_data.start = virt_to_phys(&__data_start);
565 kernel_data.end = virt_to_phys(&_end - 1);
566
567 for (i = 0; i < mi->nr_banks; i++) {
568 unsigned long virt_start, virt_end;
569
570 if (mi->bank[i].size == 0)
571 continue;
572
573 virt_start = __phys_to_virt(mi->bank[i].start);
574 virt_end = virt_start + mi->bank[i].size - 1;
575
576 res = alloc_bootmem_low(sizeof(*res));
577 res->name = "System RAM";
578 res->start = __virt_to_phys(virt_start);
579 res->end = __virt_to_phys(virt_end);
580 res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
581
582 request_resource(&iomem_resource, res);
583
584 if (kernel_code.start >= res->start &&
585 kernel_code.end <= res->end)
586 request_resource(res, &kernel_code);
587 if (kernel_data.start >= res->start &&
588 kernel_data.end <= res->end)
589 request_resource(res, &kernel_data);
590 }
591
592 if (mdesc->video_start) {
593 video_ram.start = mdesc->video_start;
594 video_ram.end = mdesc->video_end;
595 request_resource(&iomem_resource, &video_ram);
596 }
597
598 /*
599 * Some machines don't have the possibility of ever
600 * possessing lp0, lp1 or lp2
601 */
602 if (mdesc->reserve_lp0)
603 request_resource(&ioport_resource, &lp0);
604 if (mdesc->reserve_lp1)
605 request_resource(&ioport_resource, &lp1);
606 if (mdesc->reserve_lp2)
607 request_resource(&ioport_resource, &lp2);
608}
609
610/*
611 * Tag parsing.
612 *
613 * This is the new way of passing data to the kernel at boot time. Rather
614 * than passing a fixed inflexible structure to the kernel, we pass a list
615 * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE
616 * tag for the list to be recognised (to distinguish the tagged list from
617 * a param_struct). The list is terminated with a zero-length tag (this tag
618 * is not parsed in any way).
619 */
620static int __init parse_tag_core(const struct tag *tag)
621{
622 if (tag->hdr.size > 2) {
623 if ((tag->u.core.flags & 1) == 0)
624 root_mountflags &= ~MS_RDONLY;
625 ROOT_DEV = old_decode_dev(tag->u.core.rootdev);
626 }
627 return 0;
628}
629
630__tagtable(ATAG_CORE, parse_tag_core);
631
632static int __init parse_tag_mem32(const struct tag *tag)
633{
634 if (meminfo.nr_banks >= NR_BANKS) {
635 printk(KERN_WARNING
636 "Ignoring memory bank 0x%08x size %dKB\n",
637 tag->u.mem.start, tag->u.mem.size / 1024);
638 return -EINVAL;
639 }
Andrew Morton1c97b732006-04-20 21:41:18 +0100640 arm_add_memory(tag->u.mem.start, tag->u.mem.size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 return 0;
642}
643
644__tagtable(ATAG_MEM, parse_tag_mem32);
645
646#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
647struct screen_info screen_info = {
648 .orig_video_lines = 30,
649 .orig_video_cols = 80,
650 .orig_video_mode = 0,
651 .orig_video_ega_bx = 0,
652 .orig_video_isVGA = 1,
653 .orig_video_points = 8
654};
655
656static int __init parse_tag_videotext(const struct tag *tag)
657{
658 screen_info.orig_x = tag->u.videotext.x;
659 screen_info.orig_y = tag->u.videotext.y;
660 screen_info.orig_video_page = tag->u.videotext.video_page;
661 screen_info.orig_video_mode = tag->u.videotext.video_mode;
662 screen_info.orig_video_cols = tag->u.videotext.video_cols;
663 screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx;
664 screen_info.orig_video_lines = tag->u.videotext.video_lines;
665 screen_info.orig_video_isVGA = tag->u.videotext.video_isvga;
666 screen_info.orig_video_points = tag->u.videotext.video_points;
667 return 0;
668}
669
670__tagtable(ATAG_VIDEOTEXT, parse_tag_videotext);
671#endif
672
673static int __init parse_tag_ramdisk(const struct tag *tag)
674{
675 setup_ramdisk((tag->u.ramdisk.flags & 1) == 0,
676 (tag->u.ramdisk.flags & 2) == 0,
677 tag->u.ramdisk.start, tag->u.ramdisk.size);
678 return 0;
679}
680
681__tagtable(ATAG_RAMDISK, parse_tag_ramdisk);
682
683static int __init parse_tag_initrd(const struct tag *tag)
684{
685 printk(KERN_WARNING "ATAG_INITRD is deprecated; "
686 "please update your bootloader.\n");
687 phys_initrd_start = __virt_to_phys(tag->u.initrd.start);
688 phys_initrd_size = tag->u.initrd.size;
689 return 0;
690}
691
692__tagtable(ATAG_INITRD, parse_tag_initrd);
693
694static int __init parse_tag_initrd2(const struct tag *tag)
695{
696 phys_initrd_start = tag->u.initrd.start;
697 phys_initrd_size = tag->u.initrd.size;
698 return 0;
699}
700
701__tagtable(ATAG_INITRD2, parse_tag_initrd2);
702
703static int __init parse_tag_serialnr(const struct tag *tag)
704{
705 system_serial_low = tag->u.serialnr.low;
706 system_serial_high = tag->u.serialnr.high;
707 return 0;
708}
709
710__tagtable(ATAG_SERIAL, parse_tag_serialnr);
711
712static int __init parse_tag_revision(const struct tag *tag)
713{
714 system_rev = tag->u.revision.rev;
715 return 0;
716}
717
718__tagtable(ATAG_REVISION, parse_tag_revision);
719
720static int __init parse_tag_cmdline(const struct tag *tag)
721{
722 strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
723 return 0;
724}
725
726__tagtable(ATAG_CMDLINE, parse_tag_cmdline);
727
728/*
729 * Scan the tag table for this tag, and call its parse function.
730 * The tag table is built by the linker from all the __tagtable
731 * declarations.
732 */
733static int __init parse_tag(const struct tag *tag)
734{
735 extern struct tagtable __tagtable_begin, __tagtable_end;
736 struct tagtable *t;
737
738 for (t = &__tagtable_begin; t < &__tagtable_end; t++)
739 if (tag->hdr.tag == t->tag) {
740 t->parse(tag);
741 break;
742 }
743
744 return t < &__tagtable_end;
745}
746
747/*
748 * Parse all tags in the list, checking both the global and architecture
749 * specific tag tables.
750 */
751static void __init parse_tags(const struct tag *t)
752{
753 for (; t->hdr.size; t = tag_next(t))
754 if (!parse_tag(t))
755 printk(KERN_WARNING
756 "Ignoring unrecognised tag 0x%08x\n",
757 t->hdr.tag);
758}
759
760/*
761 * This holds our defaults.
762 */
763static struct init_tags {
764 struct tag_header hdr1;
765 struct tag_core core;
766 struct tag_header hdr2;
767 struct tag_mem32 mem;
768 struct tag_header hdr3;
769} init_tags __initdata = {
770 { tag_size(tag_core), ATAG_CORE },
771 { 1, PAGE_SIZE, 0xff },
772 { tag_size(tag_mem32), ATAG_MEM },
773 { MEM_SIZE, PHYS_OFFSET },
774 { 0, ATAG_NONE }
775};
776
777static void (*init_machine)(void) __initdata;
778
779static int __init customize_machine(void)
780{
781 /* customizes platform devices, or adds new ones */
782 if (init_machine)
783 init_machine();
784 return 0;
785}
786arch_initcall(customize_machine);
787
788void __init setup_arch(char **cmdline_p)
789{
790 struct tag *tags = (struct tag *)&init_tags;
791 struct machine_desc *mdesc;
792 char *from = default_command_line;
793
794 setup_processor();
795 mdesc = setup_machine(machine_arch_type);
796 machine_name = mdesc->name;
797
798 if (mdesc->soft_reboot)
799 reboot_setup("s");
800
Bill Gatliff9d20fdd2007-05-31 22:02:22 +0100801 if (__atags_pointer)
802 tags = phys_to_virt(__atags_pointer);
803 else if (mdesc->boot_params)
Russell Kingf9bd6ea2005-07-04 10:43:36 +0100804 tags = phys_to_virt(mdesc->boot_params);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805
806 /*
807 * If we have the old style parameters, convert them to
808 * a tag list.
809 */
810 if (tags->hdr.tag != ATAG_CORE)
811 convert_to_tag_list(tags);
812 if (tags->hdr.tag != ATAG_CORE)
813 tags = (struct tag *)&init_tags;
814
815 if (mdesc->fixup)
816 mdesc->fixup(mdesc, tags, &from, &meminfo);
817
818 if (tags->hdr.tag == ATAG_CORE) {
819 if (meminfo.nr_banks != 0)
820 squash_mem_tags(tags);
Richard Purdie4cd9d6f2008-01-02 00:56:46 +0100821 save_atags(tags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 parse_tags(tags);
823 }
824
825 init_mm.start_code = (unsigned long) &_text;
826 init_mm.end_code = (unsigned long) &_etext;
827 init_mm.end_data = (unsigned long) &_edata;
828 init_mm.brk = (unsigned long) &_end;
829
Alon Bar-Levcd818992007-02-12 00:54:06 -0800830 memcpy(boot_command_line, from, COMMAND_LINE_SIZE);
831 boot_command_line[COMMAND_LINE_SIZE-1] = '\0';
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 parse_cmdline(cmdline_p, from);
833 paging_init(&meminfo, mdesc);
834 request_standard_resources(&meminfo, mdesc);
835
Russell King7bbb7942006-02-16 11:08:09 +0000836#ifdef CONFIG_SMP
837 smp_init_cpus();
838#endif
839
Russell Kingccea7a12005-05-31 22:22:32 +0100840 cpu_init();
841
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 /*
843 * Set up various architecture-specific pointers
844 */
845 init_arch_irq = mdesc->init_irq;
846 system_timer = mdesc->timer;
847 init_machine = mdesc->init_machine;
848
849#ifdef CONFIG_VT
850#if defined(CONFIG_VGA_CONSOLE)
851 conswitchp = &vga_con;
852#elif defined(CONFIG_DUMMY_CONSOLE)
853 conswitchp = &dummy_con;
854#endif
855#endif
856}
857
858
859static int __init topology_init(void)
860{
861 int cpu;
862
Russell King66fb8bd2007-03-13 09:54:21 +0000863 for_each_possible_cpu(cpu) {
864 struct cpuinfo_arm *cpuinfo = &per_cpu(cpu_data, cpu);
865 cpuinfo->cpu.hotpluggable = 1;
866 register_cpu(&cpuinfo->cpu, cpu);
867 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
869 return 0;
870}
871
872subsys_initcall(topology_init);
873
874static const char *hwcap_str[] = {
875 "swp",
876 "half",
877 "thumb",
878 "26bit",
879 "fastmult",
880 "fpa",
881 "vfp",
882 "edsp",
883 "java",
Paul Gortmaker8f7f9432006-10-27 05:13:19 +0100884 "iwmmxt",
Lennert Buytenhek99e4a6d2006-12-18 00:59:10 +0100885 "crunch",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 NULL
887};
888
889static void
890c_show_cache(struct seq_file *m, const char *type, unsigned int cache)
891{
892 unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0);
893
894 seq_printf(m, "%s size\t\t: %d\n"
895 "%s assoc\t\t: %d\n"
896 "%s line length\t: %d\n"
897 "%s sets\t\t: %d\n",
898 type, mult << (8 + CACHE_SIZE(cache)),
899 type, (mult << CACHE_ASSOC(cache)) >> 1,
900 type, 8 << CACHE_LINE(cache),
901 type, 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) -
902 CACHE_LINE(cache)));
903}
904
905static int c_show(struct seq_file *m, void *v)
906{
907 int i;
908
909 seq_printf(m, "Processor\t: %s rev %d (%s)\n",
910 cpu_name, (int)processor_id & 15, elf_platform);
911
912#if defined(CONFIG_SMP)
913 for_each_online_cpu(i) {
Russell King15559722005-11-06 21:41:08 +0000914 /*
915 * glibc reads /proc/cpuinfo to determine the number of
916 * online processors, looking for lines beginning with
917 * "processor". Give glibc what it expects.
918 */
919 seq_printf(m, "processor\t: %d\n", i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n",
921 per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ),
922 (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100);
923 }
924#else /* CONFIG_SMP */
925 seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
926 loops_per_jiffy / (500000/HZ),
927 (loops_per_jiffy / (5000/HZ)) % 100);
928#endif
929
930 /* dump out the processor features */
931 seq_puts(m, "Features\t: ");
932
933 for (i = 0; hwcap_str[i]; i++)
934 if (elf_hwcap & (1 << i))
935 seq_printf(m, "%s ", hwcap_str[i]);
936
937 seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24);
938 seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]);
939
Catalin Marinas6b090a22006-01-12 16:28:16 +0000940 if ((processor_id & 0x0008f000) == 0x00000000) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 /* pre-ARM7 */
Greg Ungerer1d28bff2007-05-17 06:12:22 +0100942 seq_printf(m, "CPU part\t: %07x\n", processor_id >> 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 } else {
Catalin Marinas6b090a22006-01-12 16:28:16 +0000944 if ((processor_id & 0x0008f000) == 0x00007000) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 /* ARM7 */
946 seq_printf(m, "CPU variant\t: 0x%02x\n",
947 (processor_id >> 16) & 127);
948 } else {
949 /* post-ARM7 */
950 seq_printf(m, "CPU variant\t: 0x%x\n",
951 (processor_id >> 20) & 15);
952 }
953 seq_printf(m, "CPU part\t: 0x%03x\n",
954 (processor_id >> 4) & 0xfff);
955 }
956 seq_printf(m, "CPU revision\t: %d\n", processor_id & 15);
957
958 {
959 unsigned int cache_info = read_cpuid(CPUID_CACHETYPE);
960 if (cache_info != processor_id) {
961 seq_printf(m, "Cache type\t: %s\n"
962 "Cache clean\t: %s\n"
963 "Cache lockdown\t: %s\n"
964 "Cache format\t: %s\n",
965 cache_types[CACHE_TYPE(cache_info)],
966 cache_clean[CACHE_TYPE(cache_info)],
967 cache_lockdown[CACHE_TYPE(cache_info)],
968 CACHE_S(cache_info) ? "Harvard" : "Unified");
969
970 if (CACHE_S(cache_info)) {
971 c_show_cache(m, "I", CACHE_ISIZE(cache_info));
972 c_show_cache(m, "D", CACHE_DSIZE(cache_info));
973 } else {
974 c_show_cache(m, "Cache", CACHE_ISIZE(cache_info));
975 }
976 }
977 }
978
979 seq_puts(m, "\n");
980
981 seq_printf(m, "Hardware\t: %s\n", machine_name);
982 seq_printf(m, "Revision\t: %04x\n", system_rev);
983 seq_printf(m, "Serial\t\t: %08x%08x\n",
984 system_serial_high, system_serial_low);
985
986 return 0;
987}
988
989static void *c_start(struct seq_file *m, loff_t *pos)
990{
991 return *pos < 1 ? (void *)1 : NULL;
992}
993
994static void *c_next(struct seq_file *m, void *v, loff_t *pos)
995{
996 ++*pos;
997 return NULL;
998}
999
1000static void c_stop(struct seq_file *m, void *v)
1001{
1002}
1003
Jan Engelhardt2ffd6e12008-01-22 20:41:07 +01001004const struct seq_operations cpuinfo_op = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005 .start = c_start,
1006 .next = c_next,
1007 .stop = c_stop,
1008 .show = c_show
1009};