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Commit | Line | Data |
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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 | */ | |
ecea4ab6 | 10 | #include <linux/export.h> |
1da177e4 LT |
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> | |
894673ee | 20 | #include <linux/screen_info.h> |
1da177e4 | 21 | #include <linux/init.h> |
3c57fb43 | 22 | #include <linux/kexec.h> |
93c02ab4 | 23 | #include <linux/of_fdt.h> |
cea0bb1b | 24 | #include <linux/crash_dump.h> |
1da177e4 LT |
25 | #include <linux/root_dev.h> |
26 | #include <linux/cpu.h> | |
27 | #include <linux/interrupt.h> | |
7bbb7940 | 28 | #include <linux/smp.h> |
4e950f6f | 29 | #include <linux/fs.h> |
e119bfff | 30 | #include <linux/proc_fs.h> |
2778f620 | 31 | #include <linux/memblock.h> |
2ecccf90 DM |
32 | #include <linux/bug.h> |
33 | #include <linux/compiler.h> | |
1da177e4 | 34 | |
b86040a5 | 35 | #include <asm/unified.h> |
1da177e4 | 36 | #include <asm/cpu.h> |
0ba8b9b2 | 37 | #include <asm/cputype.h> |
1da177e4 | 38 | #include <asm/elf.h> |
1da177e4 | 39 | #include <asm/procinfo.h> |
37efe642 | 40 | #include <asm/sections.h> |
1da177e4 | 41 | #include <asm/setup.h> |
f00ec48f | 42 | #include <asm/smp_plat.h> |
1da177e4 LT |
43 | #include <asm/mach-types.h> |
44 | #include <asm/cacheflush.h> | |
46097c7d | 45 | #include <asm/cachetype.h> |
1da177e4 | 46 | #include <asm/tlbflush.h> |
2ecccf90 | 47 | #include <asm/system.h> |
1da177e4 | 48 | |
93c02ab4 | 49 | #include <asm/prom.h> |
1da177e4 LT |
50 | #include <asm/mach/arch.h> |
51 | #include <asm/mach/irq.h> | |
52 | #include <asm/mach/time.h> | |
5cbad0eb | 53 | #include <asm/traps.h> |
bff595c1 | 54 | #include <asm/unwind.h> |
1da177e4 | 55 | |
73a65b3f | 56 | #if defined(CONFIG_DEPRECATED_PARAM_STRUCT) |
0fc1c832 | 57 | #include "compat.h" |
73a65b3f | 58 | #endif |
4cd9d6f7 | 59 | #include "atags.h" |
bc581770 | 60 | #include "tcm.h" |
0fc1c832 | 61 | |
1da177e4 LT |
62 | #ifndef MEM_SIZE |
63 | #define MEM_SIZE (16*1024*1024) | |
64 | #endif | |
65 | ||
66 | #if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE) | |
67 | char fpe_type[8]; | |
68 | ||
69 | static int __init fpe_setup(char *line) | |
70 | { | |
71 | memcpy(fpe_type, line, 8); | |
72 | return 1; | |
73 | } | |
74 | ||
75 | __setup("fpe=", fpe_setup); | |
76 | #endif | |
77 | ||
4b5f32ce | 78 | extern void paging_init(struct machine_desc *desc); |
0371d3f7 | 79 | extern void sanity_check_meminfo(void); |
1da177e4 | 80 | extern void reboot_setup(char *str); |
1da177e4 LT |
81 | |
82 | unsigned int processor_id; | |
c18f6581 | 83 | EXPORT_SYMBOL(processor_id); |
0385ebc0 | 84 | unsigned int __machine_arch_type __read_mostly; |
1da177e4 | 85 | EXPORT_SYMBOL(__machine_arch_type); |
0385ebc0 | 86 | unsigned int cacheid __read_mostly; |
c0e95878 | 87 | EXPORT_SYMBOL(cacheid); |
1da177e4 | 88 | |
9d20fdd5 BG |
89 | unsigned int __atags_pointer __initdata; |
90 | ||
1da177e4 LT |
91 | unsigned int system_rev; |
92 | EXPORT_SYMBOL(system_rev); | |
93 | ||
94 | unsigned int system_serial_low; | |
95 | EXPORT_SYMBOL(system_serial_low); | |
96 | ||
97 | unsigned int system_serial_high; | |
98 | EXPORT_SYMBOL(system_serial_high); | |
99 | ||
0385ebc0 | 100 | unsigned int elf_hwcap __read_mostly; |
1da177e4 LT |
101 | EXPORT_SYMBOL(elf_hwcap); |
102 | ||
103 | ||
104 | #ifdef MULTI_CPU | |
0385ebc0 | 105 | struct processor processor __read_mostly; |
1da177e4 LT |
106 | #endif |
107 | #ifdef MULTI_TLB | |
0385ebc0 | 108 | struct cpu_tlb_fns cpu_tlb __read_mostly; |
1da177e4 LT |
109 | #endif |
110 | #ifdef MULTI_USER | |
0385ebc0 | 111 | struct cpu_user_fns cpu_user __read_mostly; |
1da177e4 LT |
112 | #endif |
113 | #ifdef MULTI_CACHE | |
0385ebc0 | 114 | struct cpu_cache_fns cpu_cache __read_mostly; |
1da177e4 | 115 | #endif |
953233dc | 116 | #ifdef CONFIG_OUTER_CACHE |
0385ebc0 | 117 | struct outer_cache_fns outer_cache __read_mostly; |
6c09f09d | 118 | EXPORT_SYMBOL(outer_cache); |
953233dc | 119 | #endif |
1da177e4 | 120 | |
2ecccf90 DM |
121 | /* |
122 | * Cached cpu_architecture() result for use by assembler code. | |
123 | * C code should use the cpu_architecture() function instead of accessing this | |
124 | * variable directly. | |
125 | */ | |
126 | int __cpu_architecture __read_mostly = CPU_ARCH_UNKNOWN; | |
127 | ||
ccea7a19 RK |
128 | struct stack { |
129 | u32 irq[3]; | |
130 | u32 abt[3]; | |
131 | u32 und[3]; | |
132 | } ____cacheline_aligned; | |
133 | ||
134 | static struct stack stacks[NR_CPUS]; | |
135 | ||
1da177e4 LT |
136 | char elf_platform[ELF_PLATFORM_SIZE]; |
137 | EXPORT_SYMBOL(elf_platform); | |
138 | ||
1da177e4 LT |
139 | static const char *cpu_name; |
140 | static const char *machine_name; | |
48ab7e09 | 141 | static char __initdata cmd_line[COMMAND_LINE_SIZE]; |
8ff1443c | 142 | struct machine_desc *machine_desc __initdata; |
1da177e4 LT |
143 | |
144 | static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE; | |
145 | static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } }; | |
146 | #define ENDIANNESS ((char)endian_test.l) | |
147 | ||
148 | DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data); | |
149 | ||
150 | /* | |
151 | * Standard memory resources | |
152 | */ | |
153 | static struct resource mem_res[] = { | |
740e518e GKH |
154 | { |
155 | .name = "Video RAM", | |
156 | .start = 0, | |
157 | .end = 0, | |
158 | .flags = IORESOURCE_MEM | |
159 | }, | |
160 | { | |
161 | .name = "Kernel text", | |
162 | .start = 0, | |
163 | .end = 0, | |
164 | .flags = IORESOURCE_MEM | |
165 | }, | |
166 | { | |
167 | .name = "Kernel data", | |
168 | .start = 0, | |
169 | .end = 0, | |
170 | .flags = IORESOURCE_MEM | |
171 | } | |
1da177e4 LT |
172 | }; |
173 | ||
174 | #define video_ram mem_res[0] | |
175 | #define kernel_code mem_res[1] | |
176 | #define kernel_data mem_res[2] | |
177 | ||
178 | static struct resource io_res[] = { | |
740e518e GKH |
179 | { |
180 | .name = "reserved", | |
181 | .start = 0x3bc, | |
182 | .end = 0x3be, | |
183 | .flags = IORESOURCE_IO | IORESOURCE_BUSY | |
184 | }, | |
185 | { | |
186 | .name = "reserved", | |
187 | .start = 0x378, | |
188 | .end = 0x37f, | |
189 | .flags = IORESOURCE_IO | IORESOURCE_BUSY | |
190 | }, | |
191 | { | |
192 | .name = "reserved", | |
193 | .start = 0x278, | |
194 | .end = 0x27f, | |
195 | .flags = IORESOURCE_IO | IORESOURCE_BUSY | |
196 | } | |
1da177e4 LT |
197 | }; |
198 | ||
199 | #define lp0 io_res[0] | |
200 | #define lp1 io_res[1] | |
201 | #define lp2 io_res[2] | |
202 | ||
1da177e4 LT |
203 | static const char *proc_arch[] = { |
204 | "undefined/unknown", | |
205 | "3", | |
206 | "4", | |
207 | "4T", | |
208 | "5", | |
209 | "5T", | |
210 | "5TE", | |
211 | "5TEJ", | |
212 | "6TEJ", | |
6b090a25 | 213 | "7", |
1da177e4 LT |
214 | "?(11)", |
215 | "?(12)", | |
216 | "?(13)", | |
217 | "?(14)", | |
218 | "?(15)", | |
219 | "?(16)", | |
220 | "?(17)", | |
221 | }; | |
222 | ||
2ecccf90 | 223 | static int __get_cpu_architecture(void) |
1da177e4 LT |
224 | { |
225 | int cpu_arch; | |
226 | ||
0ba8b9b2 | 227 | if ((read_cpuid_id() & 0x0008f000) == 0) { |
1da177e4 | 228 | cpu_arch = CPU_ARCH_UNKNOWN; |
0ba8b9b2 RK |
229 | } else if ((read_cpuid_id() & 0x0008f000) == 0x00007000) { |
230 | cpu_arch = (read_cpuid_id() & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3; | |
231 | } else if ((read_cpuid_id() & 0x00080000) == 0x00000000) { | |
232 | cpu_arch = (read_cpuid_id() >> 16) & 7; | |
1da177e4 LT |
233 | if (cpu_arch) |
234 | cpu_arch += CPU_ARCH_ARMv3; | |
0ba8b9b2 | 235 | } else if ((read_cpuid_id() & 0x000f0000) == 0x000f0000) { |
180005c4 CM |
236 | unsigned int mmfr0; |
237 | ||
238 | /* Revised CPUID format. Read the Memory Model Feature | |
239 | * Register 0 and check for VMSAv7 or PMSAv7 */ | |
240 | asm("mrc p15, 0, %0, c0, c1, 4" | |
241 | : "=r" (mmfr0)); | |
315cfe78 CM |
242 | if ((mmfr0 & 0x0000000f) >= 0x00000003 || |
243 | (mmfr0 & 0x000000f0) >= 0x00000030) | |
180005c4 CM |
244 | cpu_arch = CPU_ARCH_ARMv7; |
245 | else if ((mmfr0 & 0x0000000f) == 0x00000002 || | |
246 | (mmfr0 & 0x000000f0) == 0x00000020) | |
247 | cpu_arch = CPU_ARCH_ARMv6; | |
248 | else | |
249 | cpu_arch = CPU_ARCH_UNKNOWN; | |
250 | } else | |
251 | cpu_arch = CPU_ARCH_UNKNOWN; | |
1da177e4 LT |
252 | |
253 | return cpu_arch; | |
254 | } | |
255 | ||
2ecccf90 DM |
256 | int __pure cpu_architecture(void) |
257 | { | |
258 | BUG_ON(__cpu_architecture == CPU_ARCH_UNKNOWN); | |
259 | ||
260 | return __cpu_architecture; | |
261 | } | |
262 | ||
8925ec4c WD |
263 | static int cpu_has_aliasing_icache(unsigned int arch) |
264 | { | |
265 | int aliasing_icache; | |
266 | unsigned int id_reg, num_sets, line_size; | |
267 | ||
7f94e9cc WD |
268 | /* PIPT caches never alias. */ |
269 | if (icache_is_pipt()) | |
270 | return 0; | |
271 | ||
8925ec4c WD |
272 | /* arch specifies the register format */ |
273 | switch (arch) { | |
274 | case CPU_ARCH_ARMv7: | |
5fb31a96 LW |
275 | asm("mcr p15, 2, %0, c0, c0, 0 @ set CSSELR" |
276 | : /* No output operands */ | |
8925ec4c | 277 | : "r" (1)); |
5fb31a96 LW |
278 | isb(); |
279 | asm("mrc p15, 1, %0, c0, c0, 0 @ read CCSIDR" | |
280 | : "=r" (id_reg)); | |
8925ec4c WD |
281 | line_size = 4 << ((id_reg & 0x7) + 2); |
282 | num_sets = ((id_reg >> 13) & 0x7fff) + 1; | |
283 | aliasing_icache = (line_size * num_sets) > PAGE_SIZE; | |
284 | break; | |
285 | case CPU_ARCH_ARMv6: | |
286 | aliasing_icache = read_cpuid_cachetype() & (1 << 11); | |
287 | break; | |
288 | default: | |
289 | /* I-cache aliases will be handled by D-cache aliasing code */ | |
290 | aliasing_icache = 0; | |
291 | } | |
292 | ||
293 | return aliasing_icache; | |
294 | } | |
295 | ||
c0e95878 RK |
296 | static void __init cacheid_init(void) |
297 | { | |
298 | unsigned int cachetype = read_cpuid_cachetype(); | |
299 | unsigned int arch = cpu_architecture(); | |
300 | ||
b57ee99f CM |
301 | if (arch >= CPU_ARCH_ARMv6) { |
302 | if ((cachetype & (7 << 29)) == 4 << 29) { | |
303 | /* ARMv7 register format */ | |
72dc53ac | 304 | arch = CPU_ARCH_ARMv7; |
b57ee99f | 305 | cacheid = CACHEID_VIPT_NONALIASING; |
7f94e9cc WD |
306 | switch (cachetype & (3 << 14)) { |
307 | case (1 << 14): | |
b57ee99f | 308 | cacheid |= CACHEID_ASID_TAGGED; |
7f94e9cc WD |
309 | break; |
310 | case (3 << 14): | |
311 | cacheid |= CACHEID_PIPT; | |
312 | break; | |
313 | } | |
8925ec4c | 314 | } else { |
72dc53ac WD |
315 | arch = CPU_ARCH_ARMv6; |
316 | if (cachetype & (1 << 23)) | |
317 | cacheid = CACHEID_VIPT_ALIASING; | |
318 | else | |
319 | cacheid = CACHEID_VIPT_NONALIASING; | |
8925ec4c | 320 | } |
72dc53ac WD |
321 | if (cpu_has_aliasing_icache(arch)) |
322 | cacheid |= CACHEID_VIPT_I_ALIASING; | |
c0e95878 RK |
323 | } else { |
324 | cacheid = CACHEID_VIVT; | |
325 | } | |
2b4ae1f1 RK |
326 | |
327 | printk("CPU: %s data cache, %s instruction cache\n", | |
328 | cache_is_vivt() ? "VIVT" : | |
329 | cache_is_vipt_aliasing() ? "VIPT aliasing" : | |
7f94e9cc | 330 | cache_is_vipt_nonaliasing() ? "PIPT / VIPT nonaliasing" : "unknown", |
2b4ae1f1 RK |
331 | cache_is_vivt() ? "VIVT" : |
332 | icache_is_vivt_asid_tagged() ? "VIVT ASID tagged" : | |
8925ec4c | 333 | icache_is_vipt_aliasing() ? "VIPT aliasing" : |
7f94e9cc | 334 | icache_is_pipt() ? "PIPT" : |
2b4ae1f1 | 335 | cache_is_vipt_nonaliasing() ? "VIPT nonaliasing" : "unknown"); |
c0e95878 RK |
336 | } |
337 | ||
1da177e4 LT |
338 | /* |
339 | * These functions re-use the assembly code in head.S, which | |
340 | * already provide the required functionality. | |
341 | */ | |
0f44ba1d | 342 | extern struct proc_info_list *lookup_processor_type(unsigned int); |
6fc31d54 | 343 | |
93c02ab4 | 344 | void __init early_print(const char *str, ...) |
6fc31d54 RK |
345 | { |
346 | extern void printascii(const char *); | |
347 | char buf[256]; | |
348 | va_list ap; | |
349 | ||
350 | va_start(ap, str); | |
351 | vsnprintf(buf, sizeof(buf), str, ap); | |
352 | va_end(ap); | |
353 | ||
354 | #ifdef CONFIG_DEBUG_LL | |
355 | printascii(buf); | |
356 | #endif | |
357 | printk("%s", buf); | |
358 | } | |
359 | ||
f159f4ed TL |
360 | static void __init feat_v6_fixup(void) |
361 | { | |
362 | int id = read_cpuid_id(); | |
363 | ||
364 | if ((id & 0xff0f0000) != 0x41070000) | |
365 | return; | |
366 | ||
367 | /* | |
368 | * HWCAP_TLS is available only on 1136 r1p0 and later, | |
369 | * see also kuser_get_tls_init. | |
370 | */ | |
371 | if ((((id >> 4) & 0xfff) == 0xb36) && (((id >> 20) & 3) == 0)) | |
372 | elf_hwcap &= ~HWCAP_TLS; | |
373 | } | |
374 | ||
ccea7a19 RK |
375 | /* |
376 | * cpu_init - initialise one CPU. | |
377 | * | |
90f1e084 | 378 | * cpu_init sets up the per-CPU stacks. |
ccea7a19 | 379 | */ |
36c5ed23 | 380 | void cpu_init(void) |
ccea7a19 RK |
381 | { |
382 | unsigned int cpu = smp_processor_id(); | |
383 | struct stack *stk = &stacks[cpu]; | |
384 | ||
385 | if (cpu >= NR_CPUS) { | |
386 | printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu); | |
387 | BUG(); | |
388 | } | |
389 | ||
b69874e4 RK |
390 | cpu_proc_init(); |
391 | ||
b86040a5 CM |
392 | /* |
393 | * Define the placement constraint for the inline asm directive below. | |
394 | * In Thumb-2, msr with an immediate value is not allowed. | |
395 | */ | |
396 | #ifdef CONFIG_THUMB2_KERNEL | |
397 | #define PLC "r" | |
398 | #else | |
399 | #define PLC "I" | |
400 | #endif | |
401 | ||
ccea7a19 RK |
402 | /* |
403 | * setup stacks for re-entrant exception handlers | |
404 | */ | |
405 | __asm__ ( | |
406 | "msr cpsr_c, %1\n\t" | |
b86040a5 CM |
407 | "add r14, %0, %2\n\t" |
408 | "mov sp, r14\n\t" | |
ccea7a19 | 409 | "msr cpsr_c, %3\n\t" |
b86040a5 CM |
410 | "add r14, %0, %4\n\t" |
411 | "mov sp, r14\n\t" | |
ccea7a19 | 412 | "msr cpsr_c, %5\n\t" |
b86040a5 CM |
413 | "add r14, %0, %6\n\t" |
414 | "mov sp, r14\n\t" | |
ccea7a19 RK |
415 | "msr cpsr_c, %7" |
416 | : | |
417 | : "r" (stk), | |
b86040a5 | 418 | PLC (PSR_F_BIT | PSR_I_BIT | IRQ_MODE), |
ccea7a19 | 419 | "I" (offsetof(struct stack, irq[0])), |
b86040a5 | 420 | PLC (PSR_F_BIT | PSR_I_BIT | ABT_MODE), |
ccea7a19 | 421 | "I" (offsetof(struct stack, abt[0])), |
b86040a5 | 422 | PLC (PSR_F_BIT | PSR_I_BIT | UND_MODE), |
ccea7a19 | 423 | "I" (offsetof(struct stack, und[0])), |
b86040a5 | 424 | PLC (PSR_F_BIT | PSR_I_BIT | SVC_MODE) |
aaaa3f9e | 425 | : "r14"); |
ccea7a19 RK |
426 | } |
427 | ||
b69874e4 RK |
428 | static void __init setup_processor(void) |
429 | { | |
430 | struct proc_info_list *list; | |
431 | ||
432 | /* | |
433 | * locate processor in the list of supported processor | |
434 | * types. The linker builds this table for us from the | |
435 | * entries in arch/arm/mm/proc-*.S | |
436 | */ | |
437 | list = lookup_processor_type(read_cpuid_id()); | |
438 | if (!list) { | |
439 | printk("CPU configuration botched (ID %08x), unable " | |
440 | "to continue.\n", read_cpuid_id()); | |
441 | while (1); | |
442 | } | |
443 | ||
444 | cpu_name = list->cpu_name; | |
2ecccf90 | 445 | __cpu_architecture = __get_cpu_architecture(); |
b69874e4 RK |
446 | |
447 | #ifdef MULTI_CPU | |
448 | processor = *list->proc; | |
449 | #endif | |
450 | #ifdef MULTI_TLB | |
451 | cpu_tlb = *list->tlb; | |
452 | #endif | |
453 | #ifdef MULTI_USER | |
454 | cpu_user = *list->user; | |
455 | #endif | |
456 | #ifdef MULTI_CACHE | |
457 | cpu_cache = *list->cache; | |
458 | #endif | |
459 | ||
460 | printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n", | |
461 | cpu_name, read_cpuid_id(), read_cpuid_id() & 15, | |
462 | proc_arch[cpu_architecture()], cr_alignment); | |
463 | ||
a34dbfb0 WD |
464 | snprintf(init_utsname()->machine, __NEW_UTS_LEN + 1, "%s%c", |
465 | list->arch_name, ENDIANNESS); | |
466 | snprintf(elf_platform, ELF_PLATFORM_SIZE, "%s%c", | |
467 | list->elf_name, ENDIANNESS); | |
b69874e4 RK |
468 | elf_hwcap = list->elf_hwcap; |
469 | #ifndef CONFIG_ARM_THUMB | |
470 | elf_hwcap &= ~HWCAP_THUMB; | |
471 | #endif | |
472 | ||
473 | feat_v6_fixup(); | |
474 | ||
475 | cacheid_init(); | |
476 | cpu_init(); | |
477 | } | |
478 | ||
93c02ab4 | 479 | void __init dump_machine_table(void) |
1da177e4 | 480 | { |
dce72dd0 | 481 | struct machine_desc *p; |
1da177e4 | 482 | |
6291319d GL |
483 | early_print("Available machine support:\n\nID (hex)\tNAME\n"); |
484 | for_each_machine_desc(p) | |
dce72dd0 | 485 | early_print("%08x\t%s\n", p->nr, p->name); |
1da177e4 | 486 | |
dce72dd0 | 487 | early_print("\nPlease check your kernel config and/or bootloader.\n"); |
1da177e4 | 488 | |
dce72dd0 NP |
489 | while (true) |
490 | /* can't use cpu_relax() here as it may require MMU setup */; | |
1da177e4 LT |
491 | } |
492 | ||
9eb8f674 | 493 | int __init arm_add_memory(phys_addr_t start, unsigned long size) |
3a669411 | 494 | { |
4b5f32ce NP |
495 | struct membank *bank = &meminfo.bank[meminfo.nr_banks]; |
496 | ||
497 | if (meminfo.nr_banks >= NR_BANKS) { | |
498 | printk(KERN_CRIT "NR_BANKS too low, " | |
29a38193 | 499 | "ignoring memory at 0x%08llx\n", (long long)start); |
4b5f32ce NP |
500 | return -EINVAL; |
501 | } | |
05f96ef1 | 502 | |
3a669411 RK |
503 | /* |
504 | * Ensure that start/size are aligned to a page boundary. | |
505 | * Size is appropriately rounded down, start is rounded up. | |
506 | */ | |
507 | size -= start & ~PAGE_MASK; | |
05f96ef1 RK |
508 | bank->start = PAGE_ALIGN(start); |
509 | bank->size = size & PAGE_MASK; | |
4b5f32ce NP |
510 | |
511 | /* | |
512 | * Check whether this memory region has non-zero size or | |
513 | * invalid node number. | |
514 | */ | |
be370302 | 515 | if (bank->size == 0) |
4b5f32ce NP |
516 | return -EINVAL; |
517 | ||
518 | meminfo.nr_banks++; | |
519 | return 0; | |
3a669411 RK |
520 | } |
521 | ||
1da177e4 LT |
522 | /* |
523 | * Pick out the memory size. We look for mem=size@start, | |
524 | * where start and size are "size[KkMm]" | |
525 | */ | |
2b0d8c25 | 526 | static int __init early_mem(char *p) |
1da177e4 LT |
527 | { |
528 | static int usermem __initdata = 0; | |
f60892d3 WD |
529 | unsigned long size; |
530 | phys_addr_t start; | |
2b0d8c25 | 531 | char *endp; |
1da177e4 LT |
532 | |
533 | /* | |
534 | * If the user specifies memory size, we | |
535 | * blow away any automatically generated | |
536 | * size. | |
537 | */ | |
538 | if (usermem == 0) { | |
539 | usermem = 1; | |
540 | meminfo.nr_banks = 0; | |
541 | } | |
542 | ||
543 | start = PHYS_OFFSET; | |
2b0d8c25 JK |
544 | size = memparse(p, &endp); |
545 | if (*endp == '@') | |
546 | start = memparse(endp + 1, NULL); | |
1da177e4 | 547 | |
1c97b73e | 548 | arm_add_memory(start, size); |
1da177e4 | 549 | |
2b0d8c25 | 550 | return 0; |
1da177e4 | 551 | } |
2b0d8c25 | 552 | early_param("mem", early_mem); |
1da177e4 LT |
553 | |
554 | static void __init | |
555 | setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz) | |
556 | { | |
557 | #ifdef CONFIG_BLK_DEV_RAM | |
558 | extern int rd_size, rd_image_start, rd_prompt, rd_doload; | |
559 | ||
560 | rd_image_start = image_start; | |
561 | rd_prompt = prompt; | |
562 | rd_doload = doload; | |
563 | ||
564 | if (rd_sz) | |
565 | rd_size = rd_sz; | |
566 | #endif | |
567 | } | |
568 | ||
11b9369c | 569 | static void __init request_standard_resources(struct machine_desc *mdesc) |
1da177e4 | 570 | { |
11b9369c | 571 | struct memblock_region *region; |
1da177e4 | 572 | struct resource *res; |
1da177e4 | 573 | |
37efe642 RK |
574 | kernel_code.start = virt_to_phys(_text); |
575 | kernel_code.end = virt_to_phys(_etext - 1); | |
842eab40 | 576 | kernel_data.start = virt_to_phys(_sdata); |
37efe642 | 577 | kernel_data.end = virt_to_phys(_end - 1); |
1da177e4 | 578 | |
11b9369c | 579 | for_each_memblock(memory, region) { |
1da177e4 LT |
580 | res = alloc_bootmem_low(sizeof(*res)); |
581 | res->name = "System RAM"; | |
11b9369c DZ |
582 | res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region)); |
583 | res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1; | |
1da177e4 LT |
584 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
585 | ||
586 | request_resource(&iomem_resource, res); | |
587 | ||
588 | if (kernel_code.start >= res->start && | |
589 | kernel_code.end <= res->end) | |
590 | request_resource(res, &kernel_code); | |
591 | if (kernel_data.start >= res->start && | |
592 | kernel_data.end <= res->end) | |
593 | request_resource(res, &kernel_data); | |
594 | } | |
595 | ||
596 | if (mdesc->video_start) { | |
597 | video_ram.start = mdesc->video_start; | |
598 | video_ram.end = mdesc->video_end; | |
599 | request_resource(&iomem_resource, &video_ram); | |
600 | } | |
601 | ||
602 | /* | |
603 | * Some machines don't have the possibility of ever | |
604 | * possessing lp0, lp1 or lp2 | |
605 | */ | |
606 | if (mdesc->reserve_lp0) | |
607 | request_resource(&ioport_resource, &lp0); | |
608 | if (mdesc->reserve_lp1) | |
609 | request_resource(&ioport_resource, &lp1); | |
610 | if (mdesc->reserve_lp2) | |
611 | request_resource(&ioport_resource, &lp2); | |
612 | } | |
613 | ||
614 | /* | |
615 | * Tag parsing. | |
616 | * | |
617 | * This is the new way of passing data to the kernel at boot time. Rather | |
618 | * than passing a fixed inflexible structure to the kernel, we pass a list | |
619 | * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE | |
620 | * tag for the list to be recognised (to distinguish the tagged list from | |
621 | * a param_struct). The list is terminated with a zero-length tag (this tag | |
622 | * is not parsed in any way). | |
623 | */ | |
624 | static int __init parse_tag_core(const struct tag *tag) | |
625 | { | |
626 | if (tag->hdr.size > 2) { | |
627 | if ((tag->u.core.flags & 1) == 0) | |
628 | root_mountflags &= ~MS_RDONLY; | |
629 | ROOT_DEV = old_decode_dev(tag->u.core.rootdev); | |
630 | } | |
631 | return 0; | |
632 | } | |
633 | ||
634 | __tagtable(ATAG_CORE, parse_tag_core); | |
635 | ||
636 | static int __init parse_tag_mem32(const struct tag *tag) | |
637 | { | |
4b5f32ce | 638 | return arm_add_memory(tag->u.mem.start, tag->u.mem.size); |
1da177e4 LT |
639 | } |
640 | ||
641 | __tagtable(ATAG_MEM, parse_tag_mem32); | |
642 | ||
643 | #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) | |
644 | struct screen_info screen_info = { | |
645 | .orig_video_lines = 30, | |
646 | .orig_video_cols = 80, | |
647 | .orig_video_mode = 0, | |
648 | .orig_video_ega_bx = 0, | |
649 | .orig_video_isVGA = 1, | |
650 | .orig_video_points = 8 | |
651 | }; | |
652 | ||
653 | static int __init parse_tag_videotext(const struct tag *tag) | |
654 | { | |
655 | screen_info.orig_x = tag->u.videotext.x; | |
656 | screen_info.orig_y = tag->u.videotext.y; | |
657 | screen_info.orig_video_page = tag->u.videotext.video_page; | |
658 | screen_info.orig_video_mode = tag->u.videotext.video_mode; | |
659 | screen_info.orig_video_cols = tag->u.videotext.video_cols; | |
660 | screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx; | |
661 | screen_info.orig_video_lines = tag->u.videotext.video_lines; | |
662 | screen_info.orig_video_isVGA = tag->u.videotext.video_isvga; | |
663 | screen_info.orig_video_points = tag->u.videotext.video_points; | |
664 | return 0; | |
665 | } | |
666 | ||
667 | __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext); | |
668 | #endif | |
669 | ||
670 | static int __init parse_tag_ramdisk(const struct tag *tag) | |
671 | { | |
672 | setup_ramdisk((tag->u.ramdisk.flags & 1) == 0, | |
673 | (tag->u.ramdisk.flags & 2) == 0, | |
674 | tag->u.ramdisk.start, tag->u.ramdisk.size); | |
675 | return 0; | |
676 | } | |
677 | ||
678 | __tagtable(ATAG_RAMDISK, parse_tag_ramdisk); | |
679 | ||
1da177e4 LT |
680 | static int __init parse_tag_serialnr(const struct tag *tag) |
681 | { | |
682 | system_serial_low = tag->u.serialnr.low; | |
683 | system_serial_high = tag->u.serialnr.high; | |
684 | return 0; | |
685 | } | |
686 | ||
687 | __tagtable(ATAG_SERIAL, parse_tag_serialnr); | |
688 | ||
689 | static int __init parse_tag_revision(const struct tag *tag) | |
690 | { | |
691 | system_rev = tag->u.revision.rev; | |
692 | return 0; | |
693 | } | |
694 | ||
695 | __tagtable(ATAG_REVISION, parse_tag_revision); | |
696 | ||
697 | static int __init parse_tag_cmdline(const struct tag *tag) | |
698 | { | |
4394c124 VB |
699 | #if defined(CONFIG_CMDLINE_EXTEND) |
700 | strlcat(default_command_line, " ", COMMAND_LINE_SIZE); | |
701 | strlcat(default_command_line, tag->u.cmdline.cmdline, | |
702 | COMMAND_LINE_SIZE); | |
703 | #elif defined(CONFIG_CMDLINE_FORCE) | |
22eeb8f6 | 704 | pr_warning("Ignoring tag cmdline (using the default kernel command line)\n"); |
4394c124 VB |
705 | #else |
706 | strlcpy(default_command_line, tag->u.cmdline.cmdline, | |
707 | COMMAND_LINE_SIZE); | |
708 | #endif | |
1da177e4 LT |
709 | return 0; |
710 | } | |
711 | ||
712 | __tagtable(ATAG_CMDLINE, parse_tag_cmdline); | |
713 | ||
714 | /* | |
715 | * Scan the tag table for this tag, and call its parse function. | |
716 | * The tag table is built by the linker from all the __tagtable | |
717 | * declarations. | |
718 | */ | |
719 | static int __init parse_tag(const struct tag *tag) | |
720 | { | |
721 | extern struct tagtable __tagtable_begin, __tagtable_end; | |
722 | struct tagtable *t; | |
723 | ||
724 | for (t = &__tagtable_begin; t < &__tagtable_end; t++) | |
725 | if (tag->hdr.tag == t->tag) { | |
726 | t->parse(tag); | |
727 | break; | |
728 | } | |
729 | ||
730 | return t < &__tagtable_end; | |
731 | } | |
732 | ||
733 | /* | |
734 | * Parse all tags in the list, checking both the global and architecture | |
735 | * specific tag tables. | |
736 | */ | |
737 | static void __init parse_tags(const struct tag *t) | |
738 | { | |
739 | for (; t->hdr.size; t = tag_next(t)) | |
740 | if (!parse_tag(t)) | |
741 | printk(KERN_WARNING | |
742 | "Ignoring unrecognised tag 0x%08x\n", | |
743 | t->hdr.tag); | |
744 | } | |
745 | ||
746 | /* | |
747 | * This holds our defaults. | |
748 | */ | |
749 | static struct init_tags { | |
750 | struct tag_header hdr1; | |
751 | struct tag_core core; | |
752 | struct tag_header hdr2; | |
753 | struct tag_mem32 mem; | |
754 | struct tag_header hdr3; | |
755 | } init_tags __initdata = { | |
756 | { tag_size(tag_core), ATAG_CORE }, | |
757 | { 1, PAGE_SIZE, 0xff }, | |
758 | { tag_size(tag_mem32), ATAG_MEM }, | |
b75c178a | 759 | { MEM_SIZE }, |
1da177e4 LT |
760 | { 0, ATAG_NONE } |
761 | }; | |
762 | ||
1da177e4 LT |
763 | static int __init customize_machine(void) |
764 | { | |
765 | /* customizes platform devices, or adds new ones */ | |
8ff1443c RK |
766 | if (machine_desc->init_machine) |
767 | machine_desc->init_machine(); | |
1da177e4 LT |
768 | return 0; |
769 | } | |
770 | arch_initcall(customize_machine); | |
771 | ||
3c57fb43 MW |
772 | #ifdef CONFIG_KEXEC |
773 | static inline unsigned long long get_total_mem(void) | |
774 | { | |
775 | unsigned long total; | |
776 | ||
777 | total = max_low_pfn - min_low_pfn; | |
778 | return total << PAGE_SHIFT; | |
779 | } | |
780 | ||
781 | /** | |
782 | * reserve_crashkernel() - reserves memory are for crash kernel | |
783 | * | |
784 | * This function reserves memory area given in "crashkernel=" kernel command | |
785 | * line parameter. The memory reserved is used by a dump capture kernel when | |
786 | * primary kernel is crashing. | |
787 | */ | |
788 | static void __init reserve_crashkernel(void) | |
789 | { | |
790 | unsigned long long crash_size, crash_base; | |
791 | unsigned long long total_mem; | |
792 | int ret; | |
793 | ||
794 | total_mem = get_total_mem(); | |
795 | ret = parse_crashkernel(boot_command_line, total_mem, | |
796 | &crash_size, &crash_base); | |
797 | if (ret) | |
798 | return; | |
799 | ||
800 | ret = reserve_bootmem(crash_base, crash_size, BOOTMEM_EXCLUSIVE); | |
801 | if (ret < 0) { | |
802 | printk(KERN_WARNING "crashkernel reservation failed - " | |
803 | "memory is in use (0x%lx)\n", (unsigned long)crash_base); | |
804 | return; | |
805 | } | |
806 | ||
807 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " | |
808 | "for crashkernel (System RAM: %ldMB)\n", | |
809 | (unsigned long)(crash_size >> 20), | |
810 | (unsigned long)(crash_base >> 20), | |
811 | (unsigned long)(total_mem >> 20)); | |
812 | ||
813 | crashk_res.start = crash_base; | |
814 | crashk_res.end = crash_base + crash_size - 1; | |
815 | insert_resource(&iomem_resource, &crashk_res); | |
816 | } | |
817 | #else | |
818 | static inline void reserve_crashkernel(void) {} | |
819 | #endif /* CONFIG_KEXEC */ | |
820 | ||
73a65b3f UKK |
821 | static void __init squash_mem_tags(struct tag *tag) |
822 | { | |
823 | for (; tag->hdr.size; tag = tag_next(tag)) | |
824 | if (tag->hdr.tag == ATAG_MEM) | |
825 | tag->hdr.tag = ATAG_NONE; | |
826 | } | |
827 | ||
6291319d | 828 | static struct machine_desc * __init setup_machine_tags(unsigned int nr) |
1da177e4 LT |
829 | { |
830 | struct tag *tags = (struct tag *)&init_tags; | |
6291319d | 831 | struct machine_desc *mdesc = NULL, *p; |
1da177e4 LT |
832 | char *from = default_command_line; |
833 | ||
b75c178a RK |
834 | init_tags.mem.start = PHYS_OFFSET; |
835 | ||
6291319d GL |
836 | /* |
837 | * locate machine in the list of supported machines. | |
838 | */ | |
839 | for_each_machine_desc(p) | |
840 | if (nr == p->nr) { | |
841 | printk("Machine: %s\n", p->name); | |
842 | mdesc = p; | |
843 | break; | |
844 | } | |
1da177e4 | 845 | |
6291319d GL |
846 | if (!mdesc) { |
847 | early_print("\nError: unrecognized/unsupported machine ID" | |
848 | " (r1 = 0x%08x).\n\n", nr); | |
849 | dump_machine_table(); /* does not return */ | |
850 | } | |
1da177e4 | 851 | |
9d20fdd5 BG |
852 | if (__atags_pointer) |
853 | tags = phys_to_virt(__atags_pointer); | |
2bb9839e NP |
854 | else if (mdesc->atag_offset) |
855 | tags = (void *)(PAGE_OFFSET + mdesc->atag_offset); | |
1da177e4 | 856 | |
73a65b3f | 857 | #if defined(CONFIG_DEPRECATED_PARAM_STRUCT) |
1da177e4 LT |
858 | /* |
859 | * If we have the old style parameters, convert them to | |
860 | * a tag list. | |
861 | */ | |
862 | if (tags->hdr.tag != ATAG_CORE) | |
863 | convert_to_tag_list(tags); | |
73a65b3f | 864 | #endif |
93c02ab4 GL |
865 | |
866 | if (tags->hdr.tag != ATAG_CORE) { | |
867 | #if defined(CONFIG_OF) | |
868 | /* | |
869 | * If CONFIG_OF is set, then assume this is a reasonably | |
870 | * modern system that should pass boot parameters | |
871 | */ | |
872 | early_print("Warning: Neither atags nor dtb found\n"); | |
873 | #endif | |
1da177e4 | 874 | tags = (struct tag *)&init_tags; |
93c02ab4 | 875 | } |
1da177e4 LT |
876 | |
877 | if (mdesc->fixup) | |
0744a3ee | 878 | mdesc->fixup(tags, &from, &meminfo); |
1da177e4 LT |
879 | |
880 | if (tags->hdr.tag == ATAG_CORE) { | |
881 | if (meminfo.nr_banks != 0) | |
882 | squash_mem_tags(tags); | |
4cd9d6f7 | 883 | save_atags(tags); |
1da177e4 LT |
884 | parse_tags(tags); |
885 | } | |
886 | ||
6291319d GL |
887 | /* parse_early_param needs a boot_command_line */ |
888 | strlcpy(boot_command_line, from, COMMAND_LINE_SIZE); | |
889 | ||
890 | return mdesc; | |
891 | } | |
892 | ||
893 | ||
894 | void __init setup_arch(char **cmdline_p) | |
895 | { | |
896 | struct machine_desc *mdesc; | |
897 | ||
6291319d | 898 | setup_processor(); |
93c02ab4 GL |
899 | mdesc = setup_machine_fdt(__atags_pointer); |
900 | if (!mdesc) | |
901 | mdesc = setup_machine_tags(machine_arch_type); | |
6291319d GL |
902 | machine_desc = mdesc; |
903 | machine_name = mdesc->name; | |
904 | ||
905 | if (mdesc->soft_reboot) | |
906 | reboot_setup("s"); | |
907 | ||
37efe642 RK |
908 | init_mm.start_code = (unsigned long) _text; |
909 | init_mm.end_code = (unsigned long) _etext; | |
910 | init_mm.end_data = (unsigned long) _edata; | |
911 | init_mm.brk = (unsigned long) _end; | |
1da177e4 | 912 | |
48ab7e09 JK |
913 | /* populate cmd_line too for later use, preserving boot_command_line */ |
914 | strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE); | |
915 | *cmdline_p = cmd_line; | |
2b0d8c25 JK |
916 | |
917 | parse_early_param(); | |
918 | ||
0371d3f7 | 919 | sanity_check_meminfo(); |
8d717a52 | 920 | arm_memblock_init(&meminfo, mdesc); |
2778f620 | 921 | |
4b5f32ce | 922 | paging_init(mdesc); |
11b9369c | 923 | request_standard_resources(mdesc); |
1da177e4 | 924 | |
93c02ab4 GL |
925 | unflatten_device_tree(); |
926 | ||
7bbb7940 | 927 | #ifdef CONFIG_SMP |
f00ec48f RK |
928 | if (is_smp()) |
929 | smp_init_cpus(); | |
7bbb7940 | 930 | #endif |
3c57fb43 | 931 | reserve_crashkernel(); |
7bbb7940 | 932 | |
bc581770 | 933 | tcm_init(); |
ccea7a19 | 934 | |
4fddcaeb NP |
935 | #ifdef CONFIG_ZONE_DMA |
936 | if (mdesc->dma_zone_size) { | |
937 | extern unsigned long arm_dma_zone_size; | |
938 | arm_dma_zone_size = mdesc->dma_zone_size; | |
939 | } | |
940 | #endif | |
52108641 | 941 | #ifdef CONFIG_MULTI_IRQ_HANDLER |
942 | handle_arch_irq = mdesc->handle_irq; | |
943 | #endif | |
1da177e4 LT |
944 | |
945 | #ifdef CONFIG_VT | |
946 | #if defined(CONFIG_VGA_CONSOLE) | |
947 | conswitchp = &vga_con; | |
948 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
949 | conswitchp = &dummy_con; | |
950 | #endif | |
951 | #endif | |
5cbad0eb | 952 | early_trap_init(); |
dec12e62 RK |
953 | |
954 | if (mdesc->init_early) | |
955 | mdesc->init_early(); | |
1da177e4 LT |
956 | } |
957 | ||
958 | ||
959 | static int __init topology_init(void) | |
960 | { | |
961 | int cpu; | |
962 | ||
66fb8bd2 RK |
963 | for_each_possible_cpu(cpu) { |
964 | struct cpuinfo_arm *cpuinfo = &per_cpu(cpu_data, cpu); | |
965 | cpuinfo->cpu.hotpluggable = 1; | |
966 | register_cpu(&cpuinfo->cpu, cpu); | |
967 | } | |
1da177e4 LT |
968 | |
969 | return 0; | |
970 | } | |
1da177e4 LT |
971 | subsys_initcall(topology_init); |
972 | ||
e119bfff RK |
973 | #ifdef CONFIG_HAVE_PROC_CPU |
974 | static int __init proc_cpu_init(void) | |
975 | { | |
976 | struct proc_dir_entry *res; | |
977 | ||
978 | res = proc_mkdir("cpu", NULL); | |
979 | if (!res) | |
980 | return -ENOMEM; | |
981 | return 0; | |
982 | } | |
983 | fs_initcall(proc_cpu_init); | |
984 | #endif | |
985 | ||
1da177e4 LT |
986 | static const char *hwcap_str[] = { |
987 | "swp", | |
988 | "half", | |
989 | "thumb", | |
990 | "26bit", | |
991 | "fastmult", | |
992 | "fpa", | |
993 | "vfp", | |
994 | "edsp", | |
995 | "java", | |
8f7f9435 | 996 | "iwmmxt", |
99e4a6dd | 997 | "crunch", |
4369ae16 | 998 | "thumbee", |
2bedbdf4 | 999 | "neon", |
7279dc3e CM |
1000 | "vfpv3", |
1001 | "vfpv3d16", | |
254cdf8e WD |
1002 | "tls", |
1003 | "vfpv4", | |
1004 | "idiva", | |
1005 | "idivt", | |
1da177e4 LT |
1006 | NULL |
1007 | }; | |
1008 | ||
1da177e4 LT |
1009 | static int c_show(struct seq_file *m, void *v) |
1010 | { | |
1011 | int i; | |
1012 | ||
1013 | seq_printf(m, "Processor\t: %s rev %d (%s)\n", | |
0ba8b9b2 | 1014 | cpu_name, read_cpuid_id() & 15, elf_platform); |
1da177e4 LT |
1015 | |
1016 | #if defined(CONFIG_SMP) | |
1017 | for_each_online_cpu(i) { | |
15559722 RK |
1018 | /* |
1019 | * glibc reads /proc/cpuinfo to determine the number of | |
1020 | * online processors, looking for lines beginning with | |
1021 | * "processor". Give glibc what it expects. | |
1022 | */ | |
1023 | seq_printf(m, "processor\t: %d\n", i); | |
1da177e4 LT |
1024 | seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n", |
1025 | per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ), | |
1026 | (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100); | |
1027 | } | |
1028 | #else /* CONFIG_SMP */ | |
1029 | seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", | |
1030 | loops_per_jiffy / (500000/HZ), | |
1031 | (loops_per_jiffy / (5000/HZ)) % 100); | |
1032 | #endif | |
1033 | ||
1034 | /* dump out the processor features */ | |
1035 | seq_puts(m, "Features\t: "); | |
1036 | ||
1037 | for (i = 0; hwcap_str[i]; i++) | |
1038 | if (elf_hwcap & (1 << i)) | |
1039 | seq_printf(m, "%s ", hwcap_str[i]); | |
1040 | ||
0ba8b9b2 | 1041 | seq_printf(m, "\nCPU implementer\t: 0x%02x\n", read_cpuid_id() >> 24); |
1da177e4 LT |
1042 | seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]); |
1043 | ||
0ba8b9b2 | 1044 | if ((read_cpuid_id() & 0x0008f000) == 0x00000000) { |
1da177e4 | 1045 | /* pre-ARM7 */ |
0ba8b9b2 | 1046 | seq_printf(m, "CPU part\t: %07x\n", read_cpuid_id() >> 4); |
1da177e4 | 1047 | } else { |
0ba8b9b2 | 1048 | if ((read_cpuid_id() & 0x0008f000) == 0x00007000) { |
1da177e4 LT |
1049 | /* ARM7 */ |
1050 | seq_printf(m, "CPU variant\t: 0x%02x\n", | |
0ba8b9b2 | 1051 | (read_cpuid_id() >> 16) & 127); |
1da177e4 LT |
1052 | } else { |
1053 | /* post-ARM7 */ | |
1054 | seq_printf(m, "CPU variant\t: 0x%x\n", | |
0ba8b9b2 | 1055 | (read_cpuid_id() >> 20) & 15); |
1da177e4 LT |
1056 | } |
1057 | seq_printf(m, "CPU part\t: 0x%03x\n", | |
0ba8b9b2 | 1058 | (read_cpuid_id() >> 4) & 0xfff); |
1da177e4 | 1059 | } |
0ba8b9b2 | 1060 | seq_printf(m, "CPU revision\t: %d\n", read_cpuid_id() & 15); |
1da177e4 | 1061 | |
1da177e4 LT |
1062 | seq_puts(m, "\n"); |
1063 | ||
1064 | seq_printf(m, "Hardware\t: %s\n", machine_name); | |
1065 | seq_printf(m, "Revision\t: %04x\n", system_rev); | |
1066 | seq_printf(m, "Serial\t\t: %08x%08x\n", | |
1067 | system_serial_high, system_serial_low); | |
1068 | ||
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | static void *c_start(struct seq_file *m, loff_t *pos) | |
1073 | { | |
1074 | return *pos < 1 ? (void *)1 : NULL; | |
1075 | } | |
1076 | ||
1077 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
1078 | { | |
1079 | ++*pos; | |
1080 | return NULL; | |
1081 | } | |
1082 | ||
1083 | static void c_stop(struct seq_file *m, void *v) | |
1084 | { | |
1085 | } | |
1086 | ||
2ffd6e18 | 1087 | const struct seq_operations cpuinfo_op = { |
1da177e4 LT |
1088 | .start = c_start, |
1089 | .next = c_next, | |
1090 | .stop = c_stop, | |
1091 | .show = c_show | |
1092 | }; |