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1da177e4 LT |
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/config.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/stddef.h> | |
14 | #include <linux/ioport.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/utsname.h> | |
17 | #include <linux/initrd.h> | |
18 | #include <linux/console.h> | |
19 | #include <linux/bootmem.h> | |
20 | #include <linux/seq_file.h> | |
21 | #include <linux/tty.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/root_dev.h> | |
24 | #include <linux/cpu.h> | |
25 | #include <linux/interrupt.h> | |
7bbb7940 | 26 | #include <linux/smp.h> |
1da177e4 LT |
27 | |
28 | #include <asm/cpu.h> | |
29 | #include <asm/elf.h> | |
1da177e4 LT |
30 | #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 | ||
0fc1c832 BD |
40 | #include "compat.h" |
41 | ||
1da177e4 LT |
42 | #ifndef MEM_SIZE |
43 | #define MEM_SIZE (16*1024*1024) | |
44 | #endif | |
45 | ||
46 | #if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE) | |
47 | char fpe_type[8]; | |
48 | ||
49 | static int __init fpe_setup(char *line) | |
50 | { | |
51 | memcpy(fpe_type, line, 8); | |
52 | return 1; | |
53 | } | |
54 | ||
55 | __setup("fpe=", fpe_setup); | |
56 | #endif | |
57 | ||
1da177e4 | 58 | extern void paging_init(struct meminfo *, struct machine_desc *desc); |
1da177e4 LT |
59 | extern void reboot_setup(char *str); |
60 | extern int root_mountflags; | |
61 | extern void _stext, _text, _etext, __data_start, _edata, _end; | |
62 | ||
63 | unsigned int processor_id; | |
64 | unsigned int __machine_arch_type; | |
65 | EXPORT_SYMBOL(__machine_arch_type); | |
66 | ||
67 | unsigned int system_rev; | |
68 | EXPORT_SYMBOL(system_rev); | |
69 | ||
70 | unsigned int system_serial_low; | |
71 | EXPORT_SYMBOL(system_serial_low); | |
72 | ||
73 | unsigned int system_serial_high; | |
74 | EXPORT_SYMBOL(system_serial_high); | |
75 | ||
76 | unsigned int elf_hwcap; | |
77 | EXPORT_SYMBOL(elf_hwcap); | |
78 | ||
79 | ||
80 | #ifdef MULTI_CPU | |
81 | struct processor processor; | |
82 | #endif | |
83 | #ifdef MULTI_TLB | |
84 | struct cpu_tlb_fns cpu_tlb; | |
85 | #endif | |
86 | #ifdef MULTI_USER | |
87 | struct cpu_user_fns cpu_user; | |
88 | #endif | |
89 | #ifdef MULTI_CACHE | |
90 | struct cpu_cache_fns cpu_cache; | |
91 | #endif | |
92 | ||
ccea7a19 RK |
93 | struct stack { |
94 | u32 irq[3]; | |
95 | u32 abt[3]; | |
96 | u32 und[3]; | |
97 | } ____cacheline_aligned; | |
98 | ||
99 | static struct stack stacks[NR_CPUS]; | |
100 | ||
1da177e4 LT |
101 | char elf_platform[ELF_PLATFORM_SIZE]; |
102 | EXPORT_SYMBOL(elf_platform); | |
103 | ||
104 | unsigned long phys_initrd_start __initdata = 0; | |
105 | unsigned long phys_initrd_size __initdata = 0; | |
106 | ||
107 | static struct meminfo meminfo __initdata = { 0, }; | |
108 | static const char *cpu_name; | |
109 | static const char *machine_name; | |
110 | static char command_line[COMMAND_LINE_SIZE]; | |
111 | ||
112 | static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE; | |
113 | static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } }; | |
114 | #define ENDIANNESS ((char)endian_test.l) | |
115 | ||
116 | DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data); | |
117 | ||
118 | /* | |
119 | * Standard memory resources | |
120 | */ | |
121 | static struct resource mem_res[] = { | |
122 | { "Video RAM", 0, 0, IORESOURCE_MEM }, | |
123 | { "Kernel text", 0, 0, IORESOURCE_MEM }, | |
124 | { "Kernel data", 0, 0, IORESOURCE_MEM } | |
125 | }; | |
126 | ||
127 | #define video_ram mem_res[0] | |
128 | #define kernel_code mem_res[1] | |
129 | #define kernel_data mem_res[2] | |
130 | ||
131 | static struct resource io_res[] = { | |
132 | { "reserved", 0x3bc, 0x3be, IORESOURCE_IO | IORESOURCE_BUSY }, | |
133 | { "reserved", 0x378, 0x37f, IORESOURCE_IO | IORESOURCE_BUSY }, | |
134 | { "reserved", 0x278, 0x27f, IORESOURCE_IO | IORESOURCE_BUSY } | |
135 | }; | |
136 | ||
137 | #define lp0 io_res[0] | |
138 | #define lp1 io_res[1] | |
139 | #define lp2 io_res[2] | |
140 | ||
141 | static const char *cache_types[16] = { | |
142 | "write-through", | |
143 | "write-back", | |
144 | "write-back", | |
145 | "undefined 3", | |
146 | "undefined 4", | |
147 | "undefined 5", | |
148 | "write-back", | |
149 | "write-back", | |
150 | "undefined 8", | |
151 | "undefined 9", | |
152 | "undefined 10", | |
153 | "undefined 11", | |
154 | "undefined 12", | |
155 | "undefined 13", | |
156 | "write-back", | |
157 | "undefined 15", | |
158 | }; | |
159 | ||
160 | static const char *cache_clean[16] = { | |
161 | "not required", | |
162 | "read-block", | |
163 | "cp15 c7 ops", | |
164 | "undefined 3", | |
165 | "undefined 4", | |
166 | "undefined 5", | |
167 | "cp15 c7 ops", | |
168 | "cp15 c7 ops", | |
169 | "undefined 8", | |
170 | "undefined 9", | |
171 | "undefined 10", | |
172 | "undefined 11", | |
173 | "undefined 12", | |
174 | "undefined 13", | |
175 | "cp15 c7 ops", | |
176 | "undefined 15", | |
177 | }; | |
178 | ||
179 | static const char *cache_lockdown[16] = { | |
180 | "not supported", | |
181 | "not supported", | |
182 | "not supported", | |
183 | "undefined 3", | |
184 | "undefined 4", | |
185 | "undefined 5", | |
186 | "format A", | |
187 | "format B", | |
188 | "undefined 8", | |
189 | "undefined 9", | |
190 | "undefined 10", | |
191 | "undefined 11", | |
192 | "undefined 12", | |
193 | "undefined 13", | |
194 | "format C", | |
195 | "undefined 15", | |
196 | }; | |
197 | ||
198 | static const char *proc_arch[] = { | |
199 | "undefined/unknown", | |
200 | "3", | |
201 | "4", | |
202 | "4T", | |
203 | "5", | |
204 | "5T", | |
205 | "5TE", | |
206 | "5TEJ", | |
207 | "6TEJ", | |
6b090a25 | 208 | "7", |
1da177e4 LT |
209 | "?(11)", |
210 | "?(12)", | |
211 | "?(13)", | |
212 | "?(14)", | |
213 | "?(15)", | |
214 | "?(16)", | |
215 | "?(17)", | |
216 | }; | |
217 | ||
218 | #define CACHE_TYPE(x) (((x) >> 25) & 15) | |
219 | #define CACHE_S(x) ((x) & (1 << 24)) | |
220 | #define CACHE_DSIZE(x) (((x) >> 12) & 4095) /* only if S=1 */ | |
221 | #define CACHE_ISIZE(x) ((x) & 4095) | |
222 | ||
223 | #define CACHE_SIZE(y) (((y) >> 6) & 7) | |
224 | #define CACHE_ASSOC(y) (((y) >> 3) & 7) | |
225 | #define CACHE_M(y) ((y) & (1 << 2)) | |
226 | #define CACHE_LINE(y) ((y) & 3) | |
227 | ||
228 | static inline void dump_cache(const char *prefix, int cpu, unsigned int cache) | |
229 | { | |
230 | unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); | |
231 | ||
232 | printk("CPU%u: %s: %d bytes, associativity %d, %d byte lines, %d sets\n", | |
233 | cpu, prefix, | |
234 | mult << (8 + CACHE_SIZE(cache)), | |
235 | (mult << CACHE_ASSOC(cache)) >> 1, | |
236 | 8 << CACHE_LINE(cache), | |
237 | 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) - | |
238 | CACHE_LINE(cache))); | |
239 | } | |
240 | ||
241 | static void __init dump_cpu_info(int cpu) | |
242 | { | |
243 | unsigned int info = read_cpuid(CPUID_CACHETYPE); | |
244 | ||
245 | if (info != processor_id) { | |
246 | printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT", | |
247 | cache_types[CACHE_TYPE(info)]); | |
248 | if (CACHE_S(info)) { | |
249 | dump_cache("I cache", cpu, CACHE_ISIZE(info)); | |
250 | dump_cache("D cache", cpu, CACHE_DSIZE(info)); | |
251 | } else { | |
252 | dump_cache("cache", cpu, CACHE_ISIZE(info)); | |
253 | } | |
254 | } | |
23759dc6 LB |
255 | |
256 | if (arch_is_coherent()) | |
257 | printk("Cache coherency enabled\n"); | |
1da177e4 LT |
258 | } |
259 | ||
260 | int cpu_architecture(void) | |
261 | { | |
262 | int cpu_arch; | |
263 | ||
6b090a25 | 264 | if ((processor_id & 0x0008f000) == 0) { |
1da177e4 | 265 | cpu_arch = CPU_ARCH_UNKNOWN; |
6b090a25 | 266 | } else if ((processor_id & 0x0008f000) == 0x00007000) { |
1da177e4 | 267 | cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3; |
6b090a25 | 268 | } else if ((processor_id & 0x00080000) == 0x00000000) { |
1da177e4 LT |
269 | cpu_arch = (processor_id >> 16) & 7; |
270 | if (cpu_arch) | |
271 | cpu_arch += CPU_ARCH_ARMv3; | |
6b090a25 CM |
272 | } else { |
273 | /* the revised CPUID */ | |
274 | cpu_arch = ((processor_id >> 12) & 0xf) - 0xb + CPU_ARCH_ARMv6; | |
1da177e4 LT |
275 | } |
276 | ||
277 | return cpu_arch; | |
278 | } | |
279 | ||
280 | /* | |
281 | * These functions re-use the assembly code in head.S, which | |
282 | * already provide the required functionality. | |
283 | */ | |
0f44ba1d | 284 | extern struct proc_info_list *lookup_processor_type(unsigned int); |
1da177e4 LT |
285 | extern struct machine_desc *lookup_machine_type(unsigned int); |
286 | ||
287 | static void __init setup_processor(void) | |
288 | { | |
289 | struct proc_info_list *list; | |
290 | ||
291 | /* | |
292 | * locate processor in the list of supported processor | |
293 | * types. The linker builds this table for us from the | |
294 | * entries in arch/arm/mm/proc-*.S | |
295 | */ | |
0f44ba1d | 296 | list = lookup_processor_type(processor_id); |
1da177e4 LT |
297 | if (!list) { |
298 | printk("CPU configuration botched (ID %08x), unable " | |
299 | "to continue.\n", processor_id); | |
300 | while (1); | |
301 | } | |
302 | ||
303 | cpu_name = list->cpu_name; | |
304 | ||
305 | #ifdef MULTI_CPU | |
306 | processor = *list->proc; | |
307 | #endif | |
308 | #ifdef MULTI_TLB | |
309 | cpu_tlb = *list->tlb; | |
310 | #endif | |
311 | #ifdef MULTI_USER | |
312 | cpu_user = *list->user; | |
313 | #endif | |
314 | #ifdef MULTI_CACHE | |
315 | cpu_cache = *list->cache; | |
316 | #endif | |
317 | ||
318 | printk("CPU: %s [%08x] revision %d (ARMv%s)\n", | |
319 | cpu_name, processor_id, (int)processor_id & 15, | |
320 | proc_arch[cpu_architecture()]); | |
321 | ||
1da177e4 LT |
322 | sprintf(system_utsname.machine, "%s%c", list->arch_name, ENDIANNESS); |
323 | sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS); | |
324 | elf_hwcap = list->elf_hwcap; | |
adeff422 CM |
325 | #ifndef CONFIG_ARM_THUMB |
326 | elf_hwcap &= ~HWCAP_THUMB; | |
327 | #endif | |
328 | #ifndef CONFIG_VFP | |
329 | elf_hwcap &= ~HWCAP_VFP; | |
330 | #endif | |
1da177e4 LT |
331 | |
332 | cpu_proc_init(); | |
333 | } | |
334 | ||
ccea7a19 RK |
335 | /* |
336 | * cpu_init - initialise one CPU. | |
337 | * | |
338 | * cpu_init dumps the cache information, initialises SMP specific | |
339 | * information, and sets up the per-CPU stacks. | |
340 | */ | |
36c5ed23 | 341 | void cpu_init(void) |
ccea7a19 RK |
342 | { |
343 | unsigned int cpu = smp_processor_id(); | |
344 | struct stack *stk = &stacks[cpu]; | |
345 | ||
346 | if (cpu >= NR_CPUS) { | |
347 | printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu); | |
348 | BUG(); | |
349 | } | |
350 | ||
32f8b97c RK |
351 | if (system_state == SYSTEM_BOOTING) |
352 | dump_cpu_info(cpu); | |
ccea7a19 RK |
353 | |
354 | /* | |
355 | * setup stacks for re-entrant exception handlers | |
356 | */ | |
357 | __asm__ ( | |
358 | "msr cpsr_c, %1\n\t" | |
359 | "add sp, %0, %2\n\t" | |
360 | "msr cpsr_c, %3\n\t" | |
361 | "add sp, %0, %4\n\t" | |
362 | "msr cpsr_c, %5\n\t" | |
363 | "add sp, %0, %6\n\t" | |
364 | "msr cpsr_c, %7" | |
365 | : | |
366 | : "r" (stk), | |
367 | "I" (PSR_F_BIT | PSR_I_BIT | IRQ_MODE), | |
368 | "I" (offsetof(struct stack, irq[0])), | |
369 | "I" (PSR_F_BIT | PSR_I_BIT | ABT_MODE), | |
370 | "I" (offsetof(struct stack, abt[0])), | |
371 | "I" (PSR_F_BIT | PSR_I_BIT | UND_MODE), | |
372 | "I" (offsetof(struct stack, und[0])), | |
aaaa3f9e CM |
373 | "I" (PSR_F_BIT | PSR_I_BIT | SVC_MODE) |
374 | : "r14"); | |
ccea7a19 RK |
375 | } |
376 | ||
1da177e4 LT |
377 | static struct machine_desc * __init setup_machine(unsigned int nr) |
378 | { | |
379 | struct machine_desc *list; | |
380 | ||
381 | /* | |
382 | * locate machine in the list of supported machines. | |
383 | */ | |
384 | list = lookup_machine_type(nr); | |
385 | if (!list) { | |
386 | printk("Machine configuration botched (nr %d), unable " | |
387 | "to continue.\n", nr); | |
388 | while (1); | |
389 | } | |
390 | ||
391 | printk("Machine: %s\n", list->name); | |
392 | ||
393 | return list; | |
394 | } | |
395 | ||
396 | static void __init early_initrd(char **p) | |
397 | { | |
398 | unsigned long start, size; | |
399 | ||
400 | start = memparse(*p, p); | |
401 | if (**p == ',') { | |
402 | size = memparse((*p) + 1, p); | |
403 | ||
404 | phys_initrd_start = start; | |
405 | phys_initrd_size = size; | |
406 | } | |
407 | } | |
408 | __early_param("initrd=", early_initrd); | |
409 | ||
1c97b73e | 410 | static void __init arm_add_memory(unsigned long start, unsigned long size) |
3a669411 RK |
411 | { |
412 | /* | |
413 | * Ensure that start/size are aligned to a page boundary. | |
414 | * Size is appropriately rounded down, start is rounded up. | |
415 | */ | |
416 | size -= start & ~PAGE_MASK; | |
417 | ||
418 | meminfo.bank[meminfo.nr_banks].start = PAGE_ALIGN(start); | |
419 | meminfo.bank[meminfo.nr_banks].size = size & PAGE_MASK; | |
420 | meminfo.bank[meminfo.nr_banks].node = PHYS_TO_NID(start); | |
421 | meminfo.nr_banks += 1; | |
422 | } | |
423 | ||
1da177e4 LT |
424 | /* |
425 | * Pick out the memory size. We look for mem=size@start, | |
426 | * where start and size are "size[KkMm]" | |
427 | */ | |
428 | static void __init early_mem(char **p) | |
429 | { | |
430 | static int usermem __initdata = 0; | |
431 | unsigned long size, start; | |
432 | ||
433 | /* | |
434 | * If the user specifies memory size, we | |
435 | * blow away any automatically generated | |
436 | * size. | |
437 | */ | |
438 | if (usermem == 0) { | |
439 | usermem = 1; | |
440 | meminfo.nr_banks = 0; | |
441 | } | |
442 | ||
443 | start = PHYS_OFFSET; | |
444 | size = memparse(*p, p); | |
445 | if (**p == '@') | |
446 | start = memparse(*p + 1, p); | |
447 | ||
1c97b73e | 448 | arm_add_memory(start, size); |
1da177e4 LT |
449 | } |
450 | __early_param("mem=", early_mem); | |
451 | ||
452 | /* | |
453 | * Initial parsing of the command line. | |
454 | */ | |
455 | static void __init parse_cmdline(char **cmdline_p, char *from) | |
456 | { | |
457 | char c = ' ', *to = command_line; | |
458 | int len = 0; | |
459 | ||
460 | for (;;) { | |
461 | if (c == ' ') { | |
462 | extern struct early_params __early_begin, __early_end; | |
463 | struct early_params *p; | |
464 | ||
465 | for (p = &__early_begin; p < &__early_end; p++) { | |
466 | int len = strlen(p->arg); | |
467 | ||
468 | if (memcmp(from, p->arg, len) == 0) { | |
469 | if (to != command_line) | |
470 | to -= 1; | |
471 | from += len; | |
472 | p->fn(&from); | |
473 | ||
474 | while (*from != ' ' && *from != '\0') | |
475 | from++; | |
476 | break; | |
477 | } | |
478 | } | |
479 | } | |
480 | c = *from++; | |
481 | if (!c) | |
482 | break; | |
483 | if (COMMAND_LINE_SIZE <= ++len) | |
484 | break; | |
485 | *to++ = c; | |
486 | } | |
487 | *to = '\0'; | |
488 | *cmdline_p = command_line; | |
489 | } | |
490 | ||
491 | static void __init | |
492 | setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz) | |
493 | { | |
494 | #ifdef CONFIG_BLK_DEV_RAM | |
495 | extern int rd_size, rd_image_start, rd_prompt, rd_doload; | |
496 | ||
497 | rd_image_start = image_start; | |
498 | rd_prompt = prompt; | |
499 | rd_doload = doload; | |
500 | ||
501 | if (rd_sz) | |
502 | rd_size = rd_sz; | |
503 | #endif | |
504 | } | |
505 | ||
506 | static void __init | |
507 | request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc) | |
508 | { | |
509 | struct resource *res; | |
510 | int i; | |
511 | ||
512 | kernel_code.start = virt_to_phys(&_text); | |
513 | kernel_code.end = virt_to_phys(&_etext - 1); | |
514 | kernel_data.start = virt_to_phys(&__data_start); | |
515 | kernel_data.end = virt_to_phys(&_end - 1); | |
516 | ||
517 | for (i = 0; i < mi->nr_banks; i++) { | |
518 | unsigned long virt_start, virt_end; | |
519 | ||
520 | if (mi->bank[i].size == 0) | |
521 | continue; | |
522 | ||
523 | virt_start = __phys_to_virt(mi->bank[i].start); | |
524 | virt_end = virt_start + mi->bank[i].size - 1; | |
525 | ||
526 | res = alloc_bootmem_low(sizeof(*res)); | |
527 | res->name = "System RAM"; | |
528 | res->start = __virt_to_phys(virt_start); | |
529 | res->end = __virt_to_phys(virt_end); | |
530 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
531 | ||
532 | request_resource(&iomem_resource, res); | |
533 | ||
534 | if (kernel_code.start >= res->start && | |
535 | kernel_code.end <= res->end) | |
536 | request_resource(res, &kernel_code); | |
537 | if (kernel_data.start >= res->start && | |
538 | kernel_data.end <= res->end) | |
539 | request_resource(res, &kernel_data); | |
540 | } | |
541 | ||
542 | if (mdesc->video_start) { | |
543 | video_ram.start = mdesc->video_start; | |
544 | video_ram.end = mdesc->video_end; | |
545 | request_resource(&iomem_resource, &video_ram); | |
546 | } | |
547 | ||
548 | /* | |
549 | * Some machines don't have the possibility of ever | |
550 | * possessing lp0, lp1 or lp2 | |
551 | */ | |
552 | if (mdesc->reserve_lp0) | |
553 | request_resource(&ioport_resource, &lp0); | |
554 | if (mdesc->reserve_lp1) | |
555 | request_resource(&ioport_resource, &lp1); | |
556 | if (mdesc->reserve_lp2) | |
557 | request_resource(&ioport_resource, &lp2); | |
558 | } | |
559 | ||
560 | /* | |
561 | * Tag parsing. | |
562 | * | |
563 | * This is the new way of passing data to the kernel at boot time. Rather | |
564 | * than passing a fixed inflexible structure to the kernel, we pass a list | |
565 | * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE | |
566 | * tag for the list to be recognised (to distinguish the tagged list from | |
567 | * a param_struct). The list is terminated with a zero-length tag (this tag | |
568 | * is not parsed in any way). | |
569 | */ | |
570 | static int __init parse_tag_core(const struct tag *tag) | |
571 | { | |
572 | if (tag->hdr.size > 2) { | |
573 | if ((tag->u.core.flags & 1) == 0) | |
574 | root_mountflags &= ~MS_RDONLY; | |
575 | ROOT_DEV = old_decode_dev(tag->u.core.rootdev); | |
576 | } | |
577 | return 0; | |
578 | } | |
579 | ||
580 | __tagtable(ATAG_CORE, parse_tag_core); | |
581 | ||
582 | static int __init parse_tag_mem32(const struct tag *tag) | |
583 | { | |
584 | if (meminfo.nr_banks >= NR_BANKS) { | |
585 | printk(KERN_WARNING | |
586 | "Ignoring memory bank 0x%08x size %dKB\n", | |
587 | tag->u.mem.start, tag->u.mem.size / 1024); | |
588 | return -EINVAL; | |
589 | } | |
1c97b73e | 590 | arm_add_memory(tag->u.mem.start, tag->u.mem.size); |
1da177e4 LT |
591 | return 0; |
592 | } | |
593 | ||
594 | __tagtable(ATAG_MEM, parse_tag_mem32); | |
595 | ||
596 | #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) | |
597 | struct screen_info screen_info = { | |
598 | .orig_video_lines = 30, | |
599 | .orig_video_cols = 80, | |
600 | .orig_video_mode = 0, | |
601 | .orig_video_ega_bx = 0, | |
602 | .orig_video_isVGA = 1, | |
603 | .orig_video_points = 8 | |
604 | }; | |
605 | ||
606 | static int __init parse_tag_videotext(const struct tag *tag) | |
607 | { | |
608 | screen_info.orig_x = tag->u.videotext.x; | |
609 | screen_info.orig_y = tag->u.videotext.y; | |
610 | screen_info.orig_video_page = tag->u.videotext.video_page; | |
611 | screen_info.orig_video_mode = tag->u.videotext.video_mode; | |
612 | screen_info.orig_video_cols = tag->u.videotext.video_cols; | |
613 | screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx; | |
614 | screen_info.orig_video_lines = tag->u.videotext.video_lines; | |
615 | screen_info.orig_video_isVGA = tag->u.videotext.video_isvga; | |
616 | screen_info.orig_video_points = tag->u.videotext.video_points; | |
617 | return 0; | |
618 | } | |
619 | ||
620 | __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext); | |
621 | #endif | |
622 | ||
623 | static int __init parse_tag_ramdisk(const struct tag *tag) | |
624 | { | |
625 | setup_ramdisk((tag->u.ramdisk.flags & 1) == 0, | |
626 | (tag->u.ramdisk.flags & 2) == 0, | |
627 | tag->u.ramdisk.start, tag->u.ramdisk.size); | |
628 | return 0; | |
629 | } | |
630 | ||
631 | __tagtable(ATAG_RAMDISK, parse_tag_ramdisk); | |
632 | ||
633 | static int __init parse_tag_initrd(const struct tag *tag) | |
634 | { | |
635 | printk(KERN_WARNING "ATAG_INITRD is deprecated; " | |
636 | "please update your bootloader.\n"); | |
637 | phys_initrd_start = __virt_to_phys(tag->u.initrd.start); | |
638 | phys_initrd_size = tag->u.initrd.size; | |
639 | return 0; | |
640 | } | |
641 | ||
642 | __tagtable(ATAG_INITRD, parse_tag_initrd); | |
643 | ||
644 | static int __init parse_tag_initrd2(const struct tag *tag) | |
645 | { | |
646 | phys_initrd_start = tag->u.initrd.start; | |
647 | phys_initrd_size = tag->u.initrd.size; | |
648 | return 0; | |
649 | } | |
650 | ||
651 | __tagtable(ATAG_INITRD2, parse_tag_initrd2); | |
652 | ||
653 | static int __init parse_tag_serialnr(const struct tag *tag) | |
654 | { | |
655 | system_serial_low = tag->u.serialnr.low; | |
656 | system_serial_high = tag->u.serialnr.high; | |
657 | return 0; | |
658 | } | |
659 | ||
660 | __tagtable(ATAG_SERIAL, parse_tag_serialnr); | |
661 | ||
662 | static int __init parse_tag_revision(const struct tag *tag) | |
663 | { | |
664 | system_rev = tag->u.revision.rev; | |
665 | return 0; | |
666 | } | |
667 | ||
668 | __tagtable(ATAG_REVISION, parse_tag_revision); | |
669 | ||
670 | static int __init parse_tag_cmdline(const struct tag *tag) | |
671 | { | |
672 | strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE); | |
673 | return 0; | |
674 | } | |
675 | ||
676 | __tagtable(ATAG_CMDLINE, parse_tag_cmdline); | |
677 | ||
678 | /* | |
679 | * Scan the tag table for this tag, and call its parse function. | |
680 | * The tag table is built by the linker from all the __tagtable | |
681 | * declarations. | |
682 | */ | |
683 | static int __init parse_tag(const struct tag *tag) | |
684 | { | |
685 | extern struct tagtable __tagtable_begin, __tagtable_end; | |
686 | struct tagtable *t; | |
687 | ||
688 | for (t = &__tagtable_begin; t < &__tagtable_end; t++) | |
689 | if (tag->hdr.tag == t->tag) { | |
690 | t->parse(tag); | |
691 | break; | |
692 | } | |
693 | ||
694 | return t < &__tagtable_end; | |
695 | } | |
696 | ||
697 | /* | |
698 | * Parse all tags in the list, checking both the global and architecture | |
699 | * specific tag tables. | |
700 | */ | |
701 | static void __init parse_tags(const struct tag *t) | |
702 | { | |
703 | for (; t->hdr.size; t = tag_next(t)) | |
704 | if (!parse_tag(t)) | |
705 | printk(KERN_WARNING | |
706 | "Ignoring unrecognised tag 0x%08x\n", | |
707 | t->hdr.tag); | |
708 | } | |
709 | ||
710 | /* | |
711 | * This holds our defaults. | |
712 | */ | |
713 | static struct init_tags { | |
714 | struct tag_header hdr1; | |
715 | struct tag_core core; | |
716 | struct tag_header hdr2; | |
717 | struct tag_mem32 mem; | |
718 | struct tag_header hdr3; | |
719 | } init_tags __initdata = { | |
720 | { tag_size(tag_core), ATAG_CORE }, | |
721 | { 1, PAGE_SIZE, 0xff }, | |
722 | { tag_size(tag_mem32), ATAG_MEM }, | |
723 | { MEM_SIZE, PHYS_OFFSET }, | |
724 | { 0, ATAG_NONE } | |
725 | }; | |
726 | ||
727 | static void (*init_machine)(void) __initdata; | |
728 | ||
729 | static int __init customize_machine(void) | |
730 | { | |
731 | /* customizes platform devices, or adds new ones */ | |
732 | if (init_machine) | |
733 | init_machine(); | |
734 | return 0; | |
735 | } | |
736 | arch_initcall(customize_machine); | |
737 | ||
738 | void __init setup_arch(char **cmdline_p) | |
739 | { | |
740 | struct tag *tags = (struct tag *)&init_tags; | |
741 | struct machine_desc *mdesc; | |
742 | char *from = default_command_line; | |
743 | ||
744 | setup_processor(); | |
745 | mdesc = setup_machine(machine_arch_type); | |
746 | machine_name = mdesc->name; | |
747 | ||
748 | if (mdesc->soft_reboot) | |
749 | reboot_setup("s"); | |
750 | ||
f9bd6ea4 RK |
751 | if (mdesc->boot_params) |
752 | tags = phys_to_virt(mdesc->boot_params); | |
1da177e4 LT |
753 | |
754 | /* | |
755 | * If we have the old style parameters, convert them to | |
756 | * a tag list. | |
757 | */ | |
758 | if (tags->hdr.tag != ATAG_CORE) | |
759 | convert_to_tag_list(tags); | |
760 | if (tags->hdr.tag != ATAG_CORE) | |
761 | tags = (struct tag *)&init_tags; | |
762 | ||
763 | if (mdesc->fixup) | |
764 | mdesc->fixup(mdesc, tags, &from, &meminfo); | |
765 | ||
766 | if (tags->hdr.tag == ATAG_CORE) { | |
767 | if (meminfo.nr_banks != 0) | |
768 | squash_mem_tags(tags); | |
769 | parse_tags(tags); | |
770 | } | |
771 | ||
772 | init_mm.start_code = (unsigned long) &_text; | |
773 | init_mm.end_code = (unsigned long) &_etext; | |
774 | init_mm.end_data = (unsigned long) &_edata; | |
775 | init_mm.brk = (unsigned long) &_end; | |
776 | ||
777 | memcpy(saved_command_line, from, COMMAND_LINE_SIZE); | |
778 | saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; | |
779 | parse_cmdline(cmdline_p, from); | |
780 | paging_init(&meminfo, mdesc); | |
781 | request_standard_resources(&meminfo, mdesc); | |
782 | ||
7bbb7940 RK |
783 | #ifdef CONFIG_SMP |
784 | smp_init_cpus(); | |
785 | #endif | |
786 | ||
ccea7a19 RK |
787 | cpu_init(); |
788 | ||
1da177e4 LT |
789 | /* |
790 | * Set up various architecture-specific pointers | |
791 | */ | |
792 | init_arch_irq = mdesc->init_irq; | |
793 | system_timer = mdesc->timer; | |
794 | init_machine = mdesc->init_machine; | |
795 | ||
796 | #ifdef CONFIG_VT | |
797 | #if defined(CONFIG_VGA_CONSOLE) | |
798 | conswitchp = &vga_con; | |
799 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
800 | conswitchp = &dummy_con; | |
801 | #endif | |
802 | #endif | |
803 | } | |
804 | ||
805 | ||
806 | static int __init topology_init(void) | |
807 | { | |
808 | int cpu; | |
809 | ||
036999d5 | 810 | for_each_possible_cpu(cpu) |
76b67ed9 | 811 | register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu); |
1da177e4 LT |
812 | |
813 | return 0; | |
814 | } | |
815 | ||
816 | subsys_initcall(topology_init); | |
817 | ||
818 | static const char *hwcap_str[] = { | |
819 | "swp", | |
820 | "half", | |
821 | "thumb", | |
822 | "26bit", | |
823 | "fastmult", | |
824 | "fpa", | |
825 | "vfp", | |
826 | "edsp", | |
827 | "java", | |
828 | NULL | |
829 | }; | |
830 | ||
831 | static void | |
832 | c_show_cache(struct seq_file *m, const char *type, unsigned int cache) | |
833 | { | |
834 | unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); | |
835 | ||
836 | seq_printf(m, "%s size\t\t: %d\n" | |
837 | "%s assoc\t\t: %d\n" | |
838 | "%s line length\t: %d\n" | |
839 | "%s sets\t\t: %d\n", | |
840 | type, mult << (8 + CACHE_SIZE(cache)), | |
841 | type, (mult << CACHE_ASSOC(cache)) >> 1, | |
842 | type, 8 << CACHE_LINE(cache), | |
843 | type, 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) - | |
844 | CACHE_LINE(cache))); | |
845 | } | |
846 | ||
847 | static int c_show(struct seq_file *m, void *v) | |
848 | { | |
849 | int i; | |
850 | ||
851 | seq_printf(m, "Processor\t: %s rev %d (%s)\n", | |
852 | cpu_name, (int)processor_id & 15, elf_platform); | |
853 | ||
854 | #if defined(CONFIG_SMP) | |
855 | for_each_online_cpu(i) { | |
15559722 RK |
856 | /* |
857 | * glibc reads /proc/cpuinfo to determine the number of | |
858 | * online processors, looking for lines beginning with | |
859 | * "processor". Give glibc what it expects. | |
860 | */ | |
861 | seq_printf(m, "processor\t: %d\n", i); | |
1da177e4 LT |
862 | seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n", |
863 | per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ), | |
864 | (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100); | |
865 | } | |
866 | #else /* CONFIG_SMP */ | |
867 | seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", | |
868 | loops_per_jiffy / (500000/HZ), | |
869 | (loops_per_jiffy / (5000/HZ)) % 100); | |
870 | #endif | |
871 | ||
872 | /* dump out the processor features */ | |
873 | seq_puts(m, "Features\t: "); | |
874 | ||
875 | for (i = 0; hwcap_str[i]; i++) | |
876 | if (elf_hwcap & (1 << i)) | |
877 | seq_printf(m, "%s ", hwcap_str[i]); | |
878 | ||
879 | seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24); | |
880 | seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]); | |
881 | ||
6b090a25 | 882 | if ((processor_id & 0x0008f000) == 0x00000000) { |
1da177e4 LT |
883 | /* pre-ARM7 */ |
884 | seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4); | |
885 | } else { | |
6b090a25 | 886 | if ((processor_id & 0x0008f000) == 0x00007000) { |
1da177e4 LT |
887 | /* ARM7 */ |
888 | seq_printf(m, "CPU variant\t: 0x%02x\n", | |
889 | (processor_id >> 16) & 127); | |
890 | } else { | |
891 | /* post-ARM7 */ | |
892 | seq_printf(m, "CPU variant\t: 0x%x\n", | |
893 | (processor_id >> 20) & 15); | |
894 | } | |
895 | seq_printf(m, "CPU part\t: 0x%03x\n", | |
896 | (processor_id >> 4) & 0xfff); | |
897 | } | |
898 | seq_printf(m, "CPU revision\t: %d\n", processor_id & 15); | |
899 | ||
900 | { | |
901 | unsigned int cache_info = read_cpuid(CPUID_CACHETYPE); | |
902 | if (cache_info != processor_id) { | |
903 | seq_printf(m, "Cache type\t: %s\n" | |
904 | "Cache clean\t: %s\n" | |
905 | "Cache lockdown\t: %s\n" | |
906 | "Cache format\t: %s\n", | |
907 | cache_types[CACHE_TYPE(cache_info)], | |
908 | cache_clean[CACHE_TYPE(cache_info)], | |
909 | cache_lockdown[CACHE_TYPE(cache_info)], | |
910 | CACHE_S(cache_info) ? "Harvard" : "Unified"); | |
911 | ||
912 | if (CACHE_S(cache_info)) { | |
913 | c_show_cache(m, "I", CACHE_ISIZE(cache_info)); | |
914 | c_show_cache(m, "D", CACHE_DSIZE(cache_info)); | |
915 | } else { | |
916 | c_show_cache(m, "Cache", CACHE_ISIZE(cache_info)); | |
917 | } | |
918 | } | |
919 | } | |
920 | ||
921 | seq_puts(m, "\n"); | |
922 | ||
923 | seq_printf(m, "Hardware\t: %s\n", machine_name); | |
924 | seq_printf(m, "Revision\t: %04x\n", system_rev); | |
925 | seq_printf(m, "Serial\t\t: %08x%08x\n", | |
926 | system_serial_high, system_serial_low); | |
927 | ||
928 | return 0; | |
929 | } | |
930 | ||
931 | static void *c_start(struct seq_file *m, loff_t *pos) | |
932 | { | |
933 | return *pos < 1 ? (void *)1 : NULL; | |
934 | } | |
935 | ||
936 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
937 | { | |
938 | ++*pos; | |
939 | return NULL; | |
940 | } | |
941 | ||
942 | static void c_stop(struct seq_file *m, void *v) | |
943 | { | |
944 | } | |
945 | ||
946 | struct seq_operations cpuinfo_op = { | |
947 | .start = c_start, | |
948 | .next = c_next, | |
949 | .stop = c_stop, | |
950 | .show = c_show | |
951 | }; |