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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 | ||
58 | extern unsigned int mem_fclk_21285; | |
59 | extern void paging_init(struct meminfo *, struct machine_desc *desc); | |
1da177e4 LT |
60 | extern void reboot_setup(char *str); |
61 | extern int root_mountflags; | |
62 | extern void _stext, _text, _etext, __data_start, _edata, _end; | |
63 | ||
64 | unsigned int processor_id; | |
65 | unsigned int __machine_arch_type; | |
66 | EXPORT_SYMBOL(__machine_arch_type); | |
67 | ||
68 | unsigned int system_rev; | |
69 | EXPORT_SYMBOL(system_rev); | |
70 | ||
71 | unsigned int system_serial_low; | |
72 | EXPORT_SYMBOL(system_serial_low); | |
73 | ||
74 | unsigned int system_serial_high; | |
75 | EXPORT_SYMBOL(system_serial_high); | |
76 | ||
77 | unsigned int elf_hwcap; | |
78 | EXPORT_SYMBOL(elf_hwcap); | |
79 | ||
80 | ||
81 | #ifdef MULTI_CPU | |
82 | struct processor processor; | |
83 | #endif | |
84 | #ifdef MULTI_TLB | |
85 | struct cpu_tlb_fns cpu_tlb; | |
86 | #endif | |
87 | #ifdef MULTI_USER | |
88 | struct cpu_user_fns cpu_user; | |
89 | #endif | |
90 | #ifdef MULTI_CACHE | |
91 | struct cpu_cache_fns cpu_cache; | |
92 | #endif | |
93 | ||
ccea7a19 RK |
94 | struct stack { |
95 | u32 irq[3]; | |
96 | u32 abt[3]; | |
97 | u32 und[3]; | |
98 | } ____cacheline_aligned; | |
99 | ||
100 | static struct stack stacks[NR_CPUS]; | |
101 | ||
1da177e4 LT |
102 | char elf_platform[ELF_PLATFORM_SIZE]; |
103 | EXPORT_SYMBOL(elf_platform); | |
104 | ||
105 | unsigned long phys_initrd_start __initdata = 0; | |
106 | unsigned long phys_initrd_size __initdata = 0; | |
107 | ||
108 | static struct meminfo meminfo __initdata = { 0, }; | |
109 | static const char *cpu_name; | |
110 | static const char *machine_name; | |
111 | static char command_line[COMMAND_LINE_SIZE]; | |
112 | ||
113 | static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE; | |
114 | static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } }; | |
115 | #define ENDIANNESS ((char)endian_test.l) | |
116 | ||
117 | DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data); | |
118 | ||
119 | /* | |
120 | * Standard memory resources | |
121 | */ | |
122 | static struct resource mem_res[] = { | |
123 | { "Video RAM", 0, 0, IORESOURCE_MEM }, | |
124 | { "Kernel text", 0, 0, IORESOURCE_MEM }, | |
125 | { "Kernel data", 0, 0, IORESOURCE_MEM } | |
126 | }; | |
127 | ||
128 | #define video_ram mem_res[0] | |
129 | #define kernel_code mem_res[1] | |
130 | #define kernel_data mem_res[2] | |
131 | ||
132 | static struct resource io_res[] = { | |
133 | { "reserved", 0x3bc, 0x3be, IORESOURCE_IO | IORESOURCE_BUSY }, | |
134 | { "reserved", 0x378, 0x37f, IORESOURCE_IO | IORESOURCE_BUSY }, | |
135 | { "reserved", 0x278, 0x27f, IORESOURCE_IO | IORESOURCE_BUSY } | |
136 | }; | |
137 | ||
138 | #define lp0 io_res[0] | |
139 | #define lp1 io_res[1] | |
140 | #define lp2 io_res[2] | |
141 | ||
142 | static const char *cache_types[16] = { | |
143 | "write-through", | |
144 | "write-back", | |
145 | "write-back", | |
146 | "undefined 3", | |
147 | "undefined 4", | |
148 | "undefined 5", | |
149 | "write-back", | |
150 | "write-back", | |
151 | "undefined 8", | |
152 | "undefined 9", | |
153 | "undefined 10", | |
154 | "undefined 11", | |
155 | "undefined 12", | |
156 | "undefined 13", | |
157 | "write-back", | |
158 | "undefined 15", | |
159 | }; | |
160 | ||
161 | static const char *cache_clean[16] = { | |
162 | "not required", | |
163 | "read-block", | |
164 | "cp15 c7 ops", | |
165 | "undefined 3", | |
166 | "undefined 4", | |
167 | "undefined 5", | |
168 | "cp15 c7 ops", | |
169 | "cp15 c7 ops", | |
170 | "undefined 8", | |
171 | "undefined 9", | |
172 | "undefined 10", | |
173 | "undefined 11", | |
174 | "undefined 12", | |
175 | "undefined 13", | |
176 | "cp15 c7 ops", | |
177 | "undefined 15", | |
178 | }; | |
179 | ||
180 | static const char *cache_lockdown[16] = { | |
181 | "not supported", | |
182 | "not supported", | |
183 | "not supported", | |
184 | "undefined 3", | |
185 | "undefined 4", | |
186 | "undefined 5", | |
187 | "format A", | |
188 | "format B", | |
189 | "undefined 8", | |
190 | "undefined 9", | |
191 | "undefined 10", | |
192 | "undefined 11", | |
193 | "undefined 12", | |
194 | "undefined 13", | |
195 | "format C", | |
196 | "undefined 15", | |
197 | }; | |
198 | ||
199 | static const char *proc_arch[] = { | |
200 | "undefined/unknown", | |
201 | "3", | |
202 | "4", | |
203 | "4T", | |
204 | "5", | |
205 | "5T", | |
206 | "5TE", | |
207 | "5TEJ", | |
208 | "6TEJ", | |
6b090a25 | 209 | "7", |
1da177e4 LT |
210 | "?(11)", |
211 | "?(12)", | |
212 | "?(13)", | |
213 | "?(14)", | |
214 | "?(15)", | |
215 | "?(16)", | |
216 | "?(17)", | |
217 | }; | |
218 | ||
219 | #define CACHE_TYPE(x) (((x) >> 25) & 15) | |
220 | #define CACHE_S(x) ((x) & (1 << 24)) | |
221 | #define CACHE_DSIZE(x) (((x) >> 12) & 4095) /* only if S=1 */ | |
222 | #define CACHE_ISIZE(x) ((x) & 4095) | |
223 | ||
224 | #define CACHE_SIZE(y) (((y) >> 6) & 7) | |
225 | #define CACHE_ASSOC(y) (((y) >> 3) & 7) | |
226 | #define CACHE_M(y) ((y) & (1 << 2)) | |
227 | #define CACHE_LINE(y) ((y) & 3) | |
228 | ||
229 | static inline void dump_cache(const char *prefix, int cpu, unsigned int cache) | |
230 | { | |
231 | unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); | |
232 | ||
233 | printk("CPU%u: %s: %d bytes, associativity %d, %d byte lines, %d sets\n", | |
234 | cpu, prefix, | |
235 | mult << (8 + CACHE_SIZE(cache)), | |
236 | (mult << CACHE_ASSOC(cache)) >> 1, | |
237 | 8 << CACHE_LINE(cache), | |
238 | 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) - | |
239 | CACHE_LINE(cache))); | |
240 | } | |
241 | ||
242 | static void __init dump_cpu_info(int cpu) | |
243 | { | |
244 | unsigned int info = read_cpuid(CPUID_CACHETYPE); | |
245 | ||
246 | if (info != processor_id) { | |
247 | printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT", | |
248 | cache_types[CACHE_TYPE(info)]); | |
249 | if (CACHE_S(info)) { | |
250 | dump_cache("I cache", cpu, CACHE_ISIZE(info)); | |
251 | dump_cache("D cache", cpu, CACHE_DSIZE(info)); | |
252 | } else { | |
253 | dump_cache("cache", cpu, CACHE_ISIZE(info)); | |
254 | } | |
255 | } | |
256 | } | |
257 | ||
258 | int cpu_architecture(void) | |
259 | { | |
260 | int cpu_arch; | |
261 | ||
6b090a25 | 262 | if ((processor_id & 0x0008f000) == 0) { |
1da177e4 | 263 | cpu_arch = CPU_ARCH_UNKNOWN; |
6b090a25 | 264 | } else if ((processor_id & 0x0008f000) == 0x00007000) { |
1da177e4 | 265 | cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3; |
6b090a25 | 266 | } else if ((processor_id & 0x00080000) == 0x00000000) { |
1da177e4 LT |
267 | cpu_arch = (processor_id >> 16) & 7; |
268 | if (cpu_arch) | |
269 | cpu_arch += CPU_ARCH_ARMv3; | |
6b090a25 CM |
270 | } else { |
271 | /* the revised CPUID */ | |
272 | cpu_arch = ((processor_id >> 12) & 0xf) - 0xb + CPU_ARCH_ARMv6; | |
1da177e4 LT |
273 | } |
274 | ||
275 | return cpu_arch; | |
276 | } | |
277 | ||
278 | /* | |
279 | * These functions re-use the assembly code in head.S, which | |
280 | * already provide the required functionality. | |
281 | */ | |
282 | extern struct proc_info_list *lookup_processor_type(void); | |
283 | extern struct machine_desc *lookup_machine_type(unsigned int); | |
284 | ||
285 | static void __init setup_processor(void) | |
286 | { | |
287 | struct proc_info_list *list; | |
288 | ||
289 | /* | |
290 | * locate processor in the list of supported processor | |
291 | * types. The linker builds this table for us from the | |
292 | * entries in arch/arm/mm/proc-*.S | |
293 | */ | |
294 | list = lookup_processor_type(); | |
295 | if (!list) { | |
296 | printk("CPU configuration botched (ID %08x), unable " | |
297 | "to continue.\n", processor_id); | |
298 | while (1); | |
299 | } | |
300 | ||
301 | cpu_name = list->cpu_name; | |
302 | ||
303 | #ifdef MULTI_CPU | |
304 | processor = *list->proc; | |
305 | #endif | |
306 | #ifdef MULTI_TLB | |
307 | cpu_tlb = *list->tlb; | |
308 | #endif | |
309 | #ifdef MULTI_USER | |
310 | cpu_user = *list->user; | |
311 | #endif | |
312 | #ifdef MULTI_CACHE | |
313 | cpu_cache = *list->cache; | |
314 | #endif | |
315 | ||
316 | printk("CPU: %s [%08x] revision %d (ARMv%s)\n", | |
317 | cpu_name, processor_id, (int)processor_id & 15, | |
318 | proc_arch[cpu_architecture()]); | |
319 | ||
1da177e4 LT |
320 | sprintf(system_utsname.machine, "%s%c", list->arch_name, ENDIANNESS); |
321 | sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS); | |
322 | elf_hwcap = list->elf_hwcap; | |
323 | ||
324 | cpu_proc_init(); | |
325 | } | |
326 | ||
ccea7a19 RK |
327 | /* |
328 | * cpu_init - initialise one CPU. | |
329 | * | |
330 | * cpu_init dumps the cache information, initialises SMP specific | |
331 | * information, and sets up the per-CPU stacks. | |
332 | */ | |
36c5ed23 | 333 | void cpu_init(void) |
ccea7a19 RK |
334 | { |
335 | unsigned int cpu = smp_processor_id(); | |
336 | struct stack *stk = &stacks[cpu]; | |
337 | ||
338 | if (cpu >= NR_CPUS) { | |
339 | printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu); | |
340 | BUG(); | |
341 | } | |
342 | ||
32f8b97c RK |
343 | if (system_state == SYSTEM_BOOTING) |
344 | dump_cpu_info(cpu); | |
ccea7a19 RK |
345 | |
346 | /* | |
347 | * setup stacks for re-entrant exception handlers | |
348 | */ | |
349 | __asm__ ( | |
350 | "msr cpsr_c, %1\n\t" | |
351 | "add sp, %0, %2\n\t" | |
352 | "msr cpsr_c, %3\n\t" | |
353 | "add sp, %0, %4\n\t" | |
354 | "msr cpsr_c, %5\n\t" | |
355 | "add sp, %0, %6\n\t" | |
356 | "msr cpsr_c, %7" | |
357 | : | |
358 | : "r" (stk), | |
359 | "I" (PSR_F_BIT | PSR_I_BIT | IRQ_MODE), | |
360 | "I" (offsetof(struct stack, irq[0])), | |
361 | "I" (PSR_F_BIT | PSR_I_BIT | ABT_MODE), | |
362 | "I" (offsetof(struct stack, abt[0])), | |
363 | "I" (PSR_F_BIT | PSR_I_BIT | UND_MODE), | |
364 | "I" (offsetof(struct stack, und[0])), | |
aaaa3f9e CM |
365 | "I" (PSR_F_BIT | PSR_I_BIT | SVC_MODE) |
366 | : "r14"); | |
ccea7a19 RK |
367 | } |
368 | ||
1da177e4 LT |
369 | static struct machine_desc * __init setup_machine(unsigned int nr) |
370 | { | |
371 | struct machine_desc *list; | |
372 | ||
373 | /* | |
374 | * locate machine in the list of supported machines. | |
375 | */ | |
376 | list = lookup_machine_type(nr); | |
377 | if (!list) { | |
378 | printk("Machine configuration botched (nr %d), unable " | |
379 | "to continue.\n", nr); | |
380 | while (1); | |
381 | } | |
382 | ||
383 | printk("Machine: %s\n", list->name); | |
384 | ||
385 | return list; | |
386 | } | |
387 | ||
388 | static void __init early_initrd(char **p) | |
389 | { | |
390 | unsigned long start, size; | |
391 | ||
392 | start = memparse(*p, p); | |
393 | if (**p == ',') { | |
394 | size = memparse((*p) + 1, p); | |
395 | ||
396 | phys_initrd_start = start; | |
397 | phys_initrd_size = size; | |
398 | } | |
399 | } | |
400 | __early_param("initrd=", early_initrd); | |
401 | ||
3a669411 RK |
402 | static void __init add_memory(unsigned long start, unsigned long size) |
403 | { | |
404 | /* | |
405 | * Ensure that start/size are aligned to a page boundary. | |
406 | * Size is appropriately rounded down, start is rounded up. | |
407 | */ | |
408 | size -= start & ~PAGE_MASK; | |
409 | ||
410 | meminfo.bank[meminfo.nr_banks].start = PAGE_ALIGN(start); | |
411 | meminfo.bank[meminfo.nr_banks].size = size & PAGE_MASK; | |
412 | meminfo.bank[meminfo.nr_banks].node = PHYS_TO_NID(start); | |
413 | meminfo.nr_banks += 1; | |
414 | } | |
415 | ||
1da177e4 LT |
416 | /* |
417 | * Pick out the memory size. We look for mem=size@start, | |
418 | * where start and size are "size[KkMm]" | |
419 | */ | |
420 | static void __init early_mem(char **p) | |
421 | { | |
422 | static int usermem __initdata = 0; | |
423 | unsigned long size, start; | |
424 | ||
425 | /* | |
426 | * If the user specifies memory size, we | |
427 | * blow away any automatically generated | |
428 | * size. | |
429 | */ | |
430 | if (usermem == 0) { | |
431 | usermem = 1; | |
432 | meminfo.nr_banks = 0; | |
433 | } | |
434 | ||
435 | start = PHYS_OFFSET; | |
436 | size = memparse(*p, p); | |
437 | if (**p == '@') | |
438 | start = memparse(*p + 1, p); | |
439 | ||
3a669411 | 440 | add_memory(start, size); |
1da177e4 LT |
441 | } |
442 | __early_param("mem=", early_mem); | |
443 | ||
444 | /* | |
445 | * Initial parsing of the command line. | |
446 | */ | |
447 | static void __init parse_cmdline(char **cmdline_p, char *from) | |
448 | { | |
449 | char c = ' ', *to = command_line; | |
450 | int len = 0; | |
451 | ||
452 | for (;;) { | |
453 | if (c == ' ') { | |
454 | extern struct early_params __early_begin, __early_end; | |
455 | struct early_params *p; | |
456 | ||
457 | for (p = &__early_begin; p < &__early_end; p++) { | |
458 | int len = strlen(p->arg); | |
459 | ||
460 | if (memcmp(from, p->arg, len) == 0) { | |
461 | if (to != command_line) | |
462 | to -= 1; | |
463 | from += len; | |
464 | p->fn(&from); | |
465 | ||
466 | while (*from != ' ' && *from != '\0') | |
467 | from++; | |
468 | break; | |
469 | } | |
470 | } | |
471 | } | |
472 | c = *from++; | |
473 | if (!c) | |
474 | break; | |
475 | if (COMMAND_LINE_SIZE <= ++len) | |
476 | break; | |
477 | *to++ = c; | |
478 | } | |
479 | *to = '\0'; | |
480 | *cmdline_p = command_line; | |
481 | } | |
482 | ||
483 | static void __init | |
484 | setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz) | |
485 | { | |
486 | #ifdef CONFIG_BLK_DEV_RAM | |
487 | extern int rd_size, rd_image_start, rd_prompt, rd_doload; | |
488 | ||
489 | rd_image_start = image_start; | |
490 | rd_prompt = prompt; | |
491 | rd_doload = doload; | |
492 | ||
493 | if (rd_sz) | |
494 | rd_size = rd_sz; | |
495 | #endif | |
496 | } | |
497 | ||
498 | static void __init | |
499 | request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc) | |
500 | { | |
501 | struct resource *res; | |
502 | int i; | |
503 | ||
504 | kernel_code.start = virt_to_phys(&_text); | |
505 | kernel_code.end = virt_to_phys(&_etext - 1); | |
506 | kernel_data.start = virt_to_phys(&__data_start); | |
507 | kernel_data.end = virt_to_phys(&_end - 1); | |
508 | ||
509 | for (i = 0; i < mi->nr_banks; i++) { | |
510 | unsigned long virt_start, virt_end; | |
511 | ||
512 | if (mi->bank[i].size == 0) | |
513 | continue; | |
514 | ||
515 | virt_start = __phys_to_virt(mi->bank[i].start); | |
516 | virt_end = virt_start + mi->bank[i].size - 1; | |
517 | ||
518 | res = alloc_bootmem_low(sizeof(*res)); | |
519 | res->name = "System RAM"; | |
520 | res->start = __virt_to_phys(virt_start); | |
521 | res->end = __virt_to_phys(virt_end); | |
522 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
523 | ||
524 | request_resource(&iomem_resource, res); | |
525 | ||
526 | if (kernel_code.start >= res->start && | |
527 | kernel_code.end <= res->end) | |
528 | request_resource(res, &kernel_code); | |
529 | if (kernel_data.start >= res->start && | |
530 | kernel_data.end <= res->end) | |
531 | request_resource(res, &kernel_data); | |
532 | } | |
533 | ||
534 | if (mdesc->video_start) { | |
535 | video_ram.start = mdesc->video_start; | |
536 | video_ram.end = mdesc->video_end; | |
537 | request_resource(&iomem_resource, &video_ram); | |
538 | } | |
539 | ||
540 | /* | |
541 | * Some machines don't have the possibility of ever | |
542 | * possessing lp0, lp1 or lp2 | |
543 | */ | |
544 | if (mdesc->reserve_lp0) | |
545 | request_resource(&ioport_resource, &lp0); | |
546 | if (mdesc->reserve_lp1) | |
547 | request_resource(&ioport_resource, &lp1); | |
548 | if (mdesc->reserve_lp2) | |
549 | request_resource(&ioport_resource, &lp2); | |
550 | } | |
551 | ||
552 | /* | |
553 | * Tag parsing. | |
554 | * | |
555 | * This is the new way of passing data to the kernel at boot time. Rather | |
556 | * than passing a fixed inflexible structure to the kernel, we pass a list | |
557 | * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE | |
558 | * tag for the list to be recognised (to distinguish the tagged list from | |
559 | * a param_struct). The list is terminated with a zero-length tag (this tag | |
560 | * is not parsed in any way). | |
561 | */ | |
562 | static int __init parse_tag_core(const struct tag *tag) | |
563 | { | |
564 | if (tag->hdr.size > 2) { | |
565 | if ((tag->u.core.flags & 1) == 0) | |
566 | root_mountflags &= ~MS_RDONLY; | |
567 | ROOT_DEV = old_decode_dev(tag->u.core.rootdev); | |
568 | } | |
569 | return 0; | |
570 | } | |
571 | ||
572 | __tagtable(ATAG_CORE, parse_tag_core); | |
573 | ||
574 | static int __init parse_tag_mem32(const struct tag *tag) | |
575 | { | |
576 | if (meminfo.nr_banks >= NR_BANKS) { | |
577 | printk(KERN_WARNING | |
578 | "Ignoring memory bank 0x%08x size %dKB\n", | |
579 | tag->u.mem.start, tag->u.mem.size / 1024); | |
580 | return -EINVAL; | |
581 | } | |
3a669411 | 582 | add_memory(tag->u.mem.start, tag->u.mem.size); |
1da177e4 LT |
583 | return 0; |
584 | } | |
585 | ||
586 | __tagtable(ATAG_MEM, parse_tag_mem32); | |
587 | ||
588 | #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) | |
589 | struct screen_info screen_info = { | |
590 | .orig_video_lines = 30, | |
591 | .orig_video_cols = 80, | |
592 | .orig_video_mode = 0, | |
593 | .orig_video_ega_bx = 0, | |
594 | .orig_video_isVGA = 1, | |
595 | .orig_video_points = 8 | |
596 | }; | |
597 | ||
598 | static int __init parse_tag_videotext(const struct tag *tag) | |
599 | { | |
600 | screen_info.orig_x = tag->u.videotext.x; | |
601 | screen_info.orig_y = tag->u.videotext.y; | |
602 | screen_info.orig_video_page = tag->u.videotext.video_page; | |
603 | screen_info.orig_video_mode = tag->u.videotext.video_mode; | |
604 | screen_info.orig_video_cols = tag->u.videotext.video_cols; | |
605 | screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx; | |
606 | screen_info.orig_video_lines = tag->u.videotext.video_lines; | |
607 | screen_info.orig_video_isVGA = tag->u.videotext.video_isvga; | |
608 | screen_info.orig_video_points = tag->u.videotext.video_points; | |
609 | return 0; | |
610 | } | |
611 | ||
612 | __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext); | |
613 | #endif | |
614 | ||
615 | static int __init parse_tag_ramdisk(const struct tag *tag) | |
616 | { | |
617 | setup_ramdisk((tag->u.ramdisk.flags & 1) == 0, | |
618 | (tag->u.ramdisk.flags & 2) == 0, | |
619 | tag->u.ramdisk.start, tag->u.ramdisk.size); | |
620 | return 0; | |
621 | } | |
622 | ||
623 | __tagtable(ATAG_RAMDISK, parse_tag_ramdisk); | |
624 | ||
625 | static int __init parse_tag_initrd(const struct tag *tag) | |
626 | { | |
627 | printk(KERN_WARNING "ATAG_INITRD is deprecated; " | |
628 | "please update your bootloader.\n"); | |
629 | phys_initrd_start = __virt_to_phys(tag->u.initrd.start); | |
630 | phys_initrd_size = tag->u.initrd.size; | |
631 | return 0; | |
632 | } | |
633 | ||
634 | __tagtable(ATAG_INITRD, parse_tag_initrd); | |
635 | ||
636 | static int __init parse_tag_initrd2(const struct tag *tag) | |
637 | { | |
638 | phys_initrd_start = tag->u.initrd.start; | |
639 | phys_initrd_size = tag->u.initrd.size; | |
640 | return 0; | |
641 | } | |
642 | ||
643 | __tagtable(ATAG_INITRD2, parse_tag_initrd2); | |
644 | ||
645 | static int __init parse_tag_serialnr(const struct tag *tag) | |
646 | { | |
647 | system_serial_low = tag->u.serialnr.low; | |
648 | system_serial_high = tag->u.serialnr.high; | |
649 | return 0; | |
650 | } | |
651 | ||
652 | __tagtable(ATAG_SERIAL, parse_tag_serialnr); | |
653 | ||
654 | static int __init parse_tag_revision(const struct tag *tag) | |
655 | { | |
656 | system_rev = tag->u.revision.rev; | |
657 | return 0; | |
658 | } | |
659 | ||
660 | __tagtable(ATAG_REVISION, parse_tag_revision); | |
661 | ||
662 | static int __init parse_tag_cmdline(const struct tag *tag) | |
663 | { | |
664 | strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE); | |
665 | return 0; | |
666 | } | |
667 | ||
668 | __tagtable(ATAG_CMDLINE, parse_tag_cmdline); | |
669 | ||
670 | /* | |
671 | * Scan the tag table for this tag, and call its parse function. | |
672 | * The tag table is built by the linker from all the __tagtable | |
673 | * declarations. | |
674 | */ | |
675 | static int __init parse_tag(const struct tag *tag) | |
676 | { | |
677 | extern struct tagtable __tagtable_begin, __tagtable_end; | |
678 | struct tagtable *t; | |
679 | ||
680 | for (t = &__tagtable_begin; t < &__tagtable_end; t++) | |
681 | if (tag->hdr.tag == t->tag) { | |
682 | t->parse(tag); | |
683 | break; | |
684 | } | |
685 | ||
686 | return t < &__tagtable_end; | |
687 | } | |
688 | ||
689 | /* | |
690 | * Parse all tags in the list, checking both the global and architecture | |
691 | * specific tag tables. | |
692 | */ | |
693 | static void __init parse_tags(const struct tag *t) | |
694 | { | |
695 | for (; t->hdr.size; t = tag_next(t)) | |
696 | if (!parse_tag(t)) | |
697 | printk(KERN_WARNING | |
698 | "Ignoring unrecognised tag 0x%08x\n", | |
699 | t->hdr.tag); | |
700 | } | |
701 | ||
702 | /* | |
703 | * This holds our defaults. | |
704 | */ | |
705 | static struct init_tags { | |
706 | struct tag_header hdr1; | |
707 | struct tag_core core; | |
708 | struct tag_header hdr2; | |
709 | struct tag_mem32 mem; | |
710 | struct tag_header hdr3; | |
711 | } init_tags __initdata = { | |
712 | { tag_size(tag_core), ATAG_CORE }, | |
713 | { 1, PAGE_SIZE, 0xff }, | |
714 | { tag_size(tag_mem32), ATAG_MEM }, | |
715 | { MEM_SIZE, PHYS_OFFSET }, | |
716 | { 0, ATAG_NONE } | |
717 | }; | |
718 | ||
719 | static void (*init_machine)(void) __initdata; | |
720 | ||
721 | static int __init customize_machine(void) | |
722 | { | |
723 | /* customizes platform devices, or adds new ones */ | |
724 | if (init_machine) | |
725 | init_machine(); | |
726 | return 0; | |
727 | } | |
728 | arch_initcall(customize_machine); | |
729 | ||
730 | void __init setup_arch(char **cmdline_p) | |
731 | { | |
732 | struct tag *tags = (struct tag *)&init_tags; | |
733 | struct machine_desc *mdesc; | |
734 | char *from = default_command_line; | |
735 | ||
736 | setup_processor(); | |
737 | mdesc = setup_machine(machine_arch_type); | |
738 | machine_name = mdesc->name; | |
739 | ||
740 | if (mdesc->soft_reboot) | |
741 | reboot_setup("s"); | |
742 | ||
f9bd6ea4 RK |
743 | if (mdesc->boot_params) |
744 | tags = phys_to_virt(mdesc->boot_params); | |
1da177e4 LT |
745 | |
746 | /* | |
747 | * If we have the old style parameters, convert them to | |
748 | * a tag list. | |
749 | */ | |
750 | if (tags->hdr.tag != ATAG_CORE) | |
751 | convert_to_tag_list(tags); | |
752 | if (tags->hdr.tag != ATAG_CORE) | |
753 | tags = (struct tag *)&init_tags; | |
754 | ||
755 | if (mdesc->fixup) | |
756 | mdesc->fixup(mdesc, tags, &from, &meminfo); | |
757 | ||
758 | if (tags->hdr.tag == ATAG_CORE) { | |
759 | if (meminfo.nr_banks != 0) | |
760 | squash_mem_tags(tags); | |
761 | parse_tags(tags); | |
762 | } | |
763 | ||
764 | init_mm.start_code = (unsigned long) &_text; | |
765 | init_mm.end_code = (unsigned long) &_etext; | |
766 | init_mm.end_data = (unsigned long) &_edata; | |
767 | init_mm.brk = (unsigned long) &_end; | |
768 | ||
769 | memcpy(saved_command_line, from, COMMAND_LINE_SIZE); | |
770 | saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; | |
771 | parse_cmdline(cmdline_p, from); | |
772 | paging_init(&meminfo, mdesc); | |
773 | request_standard_resources(&meminfo, mdesc); | |
774 | ||
7bbb7940 RK |
775 | #ifdef CONFIG_SMP |
776 | smp_init_cpus(); | |
777 | #endif | |
778 | ||
ccea7a19 RK |
779 | cpu_init(); |
780 | ||
1da177e4 LT |
781 | /* |
782 | * Set up various architecture-specific pointers | |
783 | */ | |
784 | init_arch_irq = mdesc->init_irq; | |
785 | system_timer = mdesc->timer; | |
786 | init_machine = mdesc->init_machine; | |
787 | ||
788 | #ifdef CONFIG_VT | |
789 | #if defined(CONFIG_VGA_CONSOLE) | |
790 | conswitchp = &vga_con; | |
791 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
792 | conswitchp = &dummy_con; | |
793 | #endif | |
794 | #endif | |
795 | } | |
796 | ||
797 | ||
798 | static int __init topology_init(void) | |
799 | { | |
800 | int cpu; | |
801 | ||
802 | for_each_cpu(cpu) | |
803 | register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu, NULL); | |
804 | ||
805 | return 0; | |
806 | } | |
807 | ||
808 | subsys_initcall(topology_init); | |
809 | ||
810 | static const char *hwcap_str[] = { | |
811 | "swp", | |
812 | "half", | |
813 | "thumb", | |
814 | "26bit", | |
815 | "fastmult", | |
816 | "fpa", | |
817 | "vfp", | |
818 | "edsp", | |
819 | "java", | |
820 | NULL | |
821 | }; | |
822 | ||
823 | static void | |
824 | c_show_cache(struct seq_file *m, const char *type, unsigned int cache) | |
825 | { | |
826 | unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); | |
827 | ||
828 | seq_printf(m, "%s size\t\t: %d\n" | |
829 | "%s assoc\t\t: %d\n" | |
830 | "%s line length\t: %d\n" | |
831 | "%s sets\t\t: %d\n", | |
832 | type, mult << (8 + CACHE_SIZE(cache)), | |
833 | type, (mult << CACHE_ASSOC(cache)) >> 1, | |
834 | type, 8 << CACHE_LINE(cache), | |
835 | type, 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) - | |
836 | CACHE_LINE(cache))); | |
837 | } | |
838 | ||
839 | static int c_show(struct seq_file *m, void *v) | |
840 | { | |
841 | int i; | |
842 | ||
843 | seq_printf(m, "Processor\t: %s rev %d (%s)\n", | |
844 | cpu_name, (int)processor_id & 15, elf_platform); | |
845 | ||
846 | #if defined(CONFIG_SMP) | |
847 | for_each_online_cpu(i) { | |
15559722 RK |
848 | /* |
849 | * glibc reads /proc/cpuinfo to determine the number of | |
850 | * online processors, looking for lines beginning with | |
851 | * "processor". Give glibc what it expects. | |
852 | */ | |
853 | seq_printf(m, "processor\t: %d\n", i); | |
1da177e4 LT |
854 | seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n", |
855 | per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ), | |
856 | (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100); | |
857 | } | |
858 | #else /* CONFIG_SMP */ | |
859 | seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", | |
860 | loops_per_jiffy / (500000/HZ), | |
861 | (loops_per_jiffy / (5000/HZ)) % 100); | |
862 | #endif | |
863 | ||
864 | /* dump out the processor features */ | |
865 | seq_puts(m, "Features\t: "); | |
866 | ||
867 | for (i = 0; hwcap_str[i]; i++) | |
868 | if (elf_hwcap & (1 << i)) | |
869 | seq_printf(m, "%s ", hwcap_str[i]); | |
870 | ||
871 | seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24); | |
872 | seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]); | |
873 | ||
6b090a25 | 874 | if ((processor_id & 0x0008f000) == 0x00000000) { |
1da177e4 LT |
875 | /* pre-ARM7 */ |
876 | seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4); | |
877 | } else { | |
6b090a25 | 878 | if ((processor_id & 0x0008f000) == 0x00007000) { |
1da177e4 LT |
879 | /* ARM7 */ |
880 | seq_printf(m, "CPU variant\t: 0x%02x\n", | |
881 | (processor_id >> 16) & 127); | |
882 | } else { | |
883 | /* post-ARM7 */ | |
884 | seq_printf(m, "CPU variant\t: 0x%x\n", | |
885 | (processor_id >> 20) & 15); | |
886 | } | |
887 | seq_printf(m, "CPU part\t: 0x%03x\n", | |
888 | (processor_id >> 4) & 0xfff); | |
889 | } | |
890 | seq_printf(m, "CPU revision\t: %d\n", processor_id & 15); | |
891 | ||
892 | { | |
893 | unsigned int cache_info = read_cpuid(CPUID_CACHETYPE); | |
894 | if (cache_info != processor_id) { | |
895 | seq_printf(m, "Cache type\t: %s\n" | |
896 | "Cache clean\t: %s\n" | |
897 | "Cache lockdown\t: %s\n" | |
898 | "Cache format\t: %s\n", | |
899 | cache_types[CACHE_TYPE(cache_info)], | |
900 | cache_clean[CACHE_TYPE(cache_info)], | |
901 | cache_lockdown[CACHE_TYPE(cache_info)], | |
902 | CACHE_S(cache_info) ? "Harvard" : "Unified"); | |
903 | ||
904 | if (CACHE_S(cache_info)) { | |
905 | c_show_cache(m, "I", CACHE_ISIZE(cache_info)); | |
906 | c_show_cache(m, "D", CACHE_DSIZE(cache_info)); | |
907 | } else { | |
908 | c_show_cache(m, "Cache", CACHE_ISIZE(cache_info)); | |
909 | } | |
910 | } | |
911 | } | |
912 | ||
913 | seq_puts(m, "\n"); | |
914 | ||
915 | seq_printf(m, "Hardware\t: %s\n", machine_name); | |
916 | seq_printf(m, "Revision\t: %04x\n", system_rev); | |
917 | seq_printf(m, "Serial\t\t: %08x%08x\n", | |
918 | system_serial_high, system_serial_low); | |
919 | ||
920 | return 0; | |
921 | } | |
922 | ||
923 | static void *c_start(struct seq_file *m, loff_t *pos) | |
924 | { | |
925 | return *pos < 1 ? (void *)1 : NULL; | |
926 | } | |
927 | ||
928 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
929 | { | |
930 | ++*pos; | |
931 | return NULL; | |
932 | } | |
933 | ||
934 | static void c_stop(struct seq_file *m, void *v) | |
935 | { | |
936 | } | |
937 | ||
938 | struct seq_operations cpuinfo_op = { | |
939 | .start = c_start, | |
940 | .next = c_next, | |
941 | .stop = c_stop, | |
942 | .show = c_show | |
943 | }; |