Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/module.h> |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/stddef.h> |
| 13 | #include <linux/ioport.h> |
| 14 | #include <linux/delay.h> |
| 15 | #include <linux/utsname.h> |
| 16 | #include <linux/initrd.h> |
| 17 | #include <linux/console.h> |
| 18 | #include <linux/bootmem.h> |
| 19 | #include <linux/seq_file.h> |
| 20 | #include <linux/tty.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/root_dev.h> |
| 23 | #include <linux/cpu.h> |
| 24 | #include <linux/interrupt.h> |
Russell King | 7bbb794 | 2006-02-16 11:08:09 +0000 | [diff] [blame] | 25 | #include <linux/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | #include <asm/cpu.h> |
| 28 | #include <asm/elf.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <asm/procinfo.h> |
| 30 | #include <asm/setup.h> |
| 31 | #include <asm/mach-types.h> |
| 32 | #include <asm/cacheflush.h> |
| 33 | #include <asm/tlbflush.h> |
| 34 | |
| 35 | #include <asm/mach/arch.h> |
| 36 | #include <asm/mach/irq.h> |
| 37 | #include <asm/mach/time.h> |
| 38 | |
Ben Dooks | 0fc1c83 | 2006-03-15 23:17:30 +0000 | [diff] [blame] | 39 | #include "compat.h" |
| 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #ifndef MEM_SIZE |
| 42 | #define MEM_SIZE (16*1024*1024) |
| 43 | #endif |
| 44 | |
| 45 | #if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE) |
| 46 | char fpe_type[8]; |
| 47 | |
| 48 | static int __init fpe_setup(char *line) |
| 49 | { |
| 50 | memcpy(fpe_type, line, 8); |
| 51 | return 1; |
| 52 | } |
| 53 | |
| 54 | __setup("fpe=", fpe_setup); |
| 55 | #endif |
| 56 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | extern void paging_init(struct meminfo *, struct machine_desc *desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | extern void reboot_setup(char *str); |
| 59 | extern int root_mountflags; |
| 60 | extern void _stext, _text, _etext, __data_start, _edata, _end; |
| 61 | |
| 62 | unsigned int processor_id; |
| 63 | unsigned int __machine_arch_type; |
| 64 | EXPORT_SYMBOL(__machine_arch_type); |
| 65 | |
| 66 | unsigned int system_rev; |
| 67 | EXPORT_SYMBOL(system_rev); |
| 68 | |
| 69 | unsigned int system_serial_low; |
| 70 | EXPORT_SYMBOL(system_serial_low); |
| 71 | |
| 72 | unsigned int system_serial_high; |
| 73 | EXPORT_SYMBOL(system_serial_high); |
| 74 | |
| 75 | unsigned int elf_hwcap; |
| 76 | EXPORT_SYMBOL(elf_hwcap); |
| 77 | |
| 78 | |
| 79 | #ifdef MULTI_CPU |
| 80 | struct processor processor; |
| 81 | #endif |
| 82 | #ifdef MULTI_TLB |
| 83 | struct cpu_tlb_fns cpu_tlb; |
| 84 | #endif |
| 85 | #ifdef MULTI_USER |
| 86 | struct cpu_user_fns cpu_user; |
| 87 | #endif |
| 88 | #ifdef MULTI_CACHE |
| 89 | struct cpu_cache_fns cpu_cache; |
| 90 | #endif |
| 91 | |
Russell King | ccea7a1 | 2005-05-31 22:22:32 +0100 | [diff] [blame] | 92 | struct stack { |
| 93 | u32 irq[3]; |
| 94 | u32 abt[3]; |
| 95 | u32 und[3]; |
| 96 | } ____cacheline_aligned; |
| 97 | |
| 98 | static struct stack stacks[NR_CPUS]; |
| 99 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | char elf_platform[ELF_PLATFORM_SIZE]; |
| 101 | EXPORT_SYMBOL(elf_platform); |
| 102 | |
| 103 | unsigned long phys_initrd_start __initdata = 0; |
| 104 | unsigned long phys_initrd_size __initdata = 0; |
| 105 | |
| 106 | static struct meminfo meminfo __initdata = { 0, }; |
| 107 | static const char *cpu_name; |
| 108 | static const char *machine_name; |
| 109 | static char command_line[COMMAND_LINE_SIZE]; |
| 110 | |
| 111 | static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE; |
| 112 | static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } }; |
| 113 | #define ENDIANNESS ((char)endian_test.l) |
| 114 | |
| 115 | DEFINE_PER_CPU(struct cpuinfo_arm, cpu_data); |
| 116 | |
| 117 | /* |
| 118 | * Standard memory resources |
| 119 | */ |
| 120 | static struct resource mem_res[] = { |
Greg Kroah-Hartman | 740e518 | 2006-06-12 14:47:06 -0700 | [diff] [blame] | 121 | { |
| 122 | .name = "Video RAM", |
| 123 | .start = 0, |
| 124 | .end = 0, |
| 125 | .flags = IORESOURCE_MEM |
| 126 | }, |
| 127 | { |
| 128 | .name = "Kernel text", |
| 129 | .start = 0, |
| 130 | .end = 0, |
| 131 | .flags = IORESOURCE_MEM |
| 132 | }, |
| 133 | { |
| 134 | .name = "Kernel data", |
| 135 | .start = 0, |
| 136 | .end = 0, |
| 137 | .flags = IORESOURCE_MEM |
| 138 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | }; |
| 140 | |
| 141 | #define video_ram mem_res[0] |
| 142 | #define kernel_code mem_res[1] |
| 143 | #define kernel_data mem_res[2] |
| 144 | |
| 145 | static struct resource io_res[] = { |
Greg Kroah-Hartman | 740e518 | 2006-06-12 14:47:06 -0700 | [diff] [blame] | 146 | { |
| 147 | .name = "reserved", |
| 148 | .start = 0x3bc, |
| 149 | .end = 0x3be, |
| 150 | .flags = IORESOURCE_IO | IORESOURCE_BUSY |
| 151 | }, |
| 152 | { |
| 153 | .name = "reserved", |
| 154 | .start = 0x378, |
| 155 | .end = 0x37f, |
| 156 | .flags = IORESOURCE_IO | IORESOURCE_BUSY |
| 157 | }, |
| 158 | { |
| 159 | .name = "reserved", |
| 160 | .start = 0x278, |
| 161 | .end = 0x27f, |
| 162 | .flags = IORESOURCE_IO | IORESOURCE_BUSY |
| 163 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | }; |
| 165 | |
| 166 | #define lp0 io_res[0] |
| 167 | #define lp1 io_res[1] |
| 168 | #define lp2 io_res[2] |
| 169 | |
| 170 | static const char *cache_types[16] = { |
| 171 | "write-through", |
| 172 | "write-back", |
| 173 | "write-back", |
| 174 | "undefined 3", |
| 175 | "undefined 4", |
| 176 | "undefined 5", |
| 177 | "write-back", |
| 178 | "write-back", |
| 179 | "undefined 8", |
| 180 | "undefined 9", |
| 181 | "undefined 10", |
| 182 | "undefined 11", |
| 183 | "undefined 12", |
| 184 | "undefined 13", |
| 185 | "write-back", |
| 186 | "undefined 15", |
| 187 | }; |
| 188 | |
| 189 | static const char *cache_clean[16] = { |
| 190 | "not required", |
| 191 | "read-block", |
| 192 | "cp15 c7 ops", |
| 193 | "undefined 3", |
| 194 | "undefined 4", |
| 195 | "undefined 5", |
| 196 | "cp15 c7 ops", |
| 197 | "cp15 c7 ops", |
| 198 | "undefined 8", |
| 199 | "undefined 9", |
| 200 | "undefined 10", |
| 201 | "undefined 11", |
| 202 | "undefined 12", |
| 203 | "undefined 13", |
| 204 | "cp15 c7 ops", |
| 205 | "undefined 15", |
| 206 | }; |
| 207 | |
| 208 | static const char *cache_lockdown[16] = { |
| 209 | "not supported", |
| 210 | "not supported", |
| 211 | "not supported", |
| 212 | "undefined 3", |
| 213 | "undefined 4", |
| 214 | "undefined 5", |
| 215 | "format A", |
| 216 | "format B", |
| 217 | "undefined 8", |
| 218 | "undefined 9", |
| 219 | "undefined 10", |
| 220 | "undefined 11", |
| 221 | "undefined 12", |
| 222 | "undefined 13", |
| 223 | "format C", |
| 224 | "undefined 15", |
| 225 | }; |
| 226 | |
| 227 | static const char *proc_arch[] = { |
| 228 | "undefined/unknown", |
| 229 | "3", |
| 230 | "4", |
| 231 | "4T", |
| 232 | "5", |
| 233 | "5T", |
| 234 | "5TE", |
| 235 | "5TEJ", |
| 236 | "6TEJ", |
Catalin Marinas | 6b090a2 | 2006-01-12 16:28:16 +0000 | [diff] [blame] | 237 | "7", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | "?(11)", |
| 239 | "?(12)", |
| 240 | "?(13)", |
| 241 | "?(14)", |
| 242 | "?(15)", |
| 243 | "?(16)", |
| 244 | "?(17)", |
| 245 | }; |
| 246 | |
| 247 | #define CACHE_TYPE(x) (((x) >> 25) & 15) |
| 248 | #define CACHE_S(x) ((x) & (1 << 24)) |
| 249 | #define CACHE_DSIZE(x) (((x) >> 12) & 4095) /* only if S=1 */ |
| 250 | #define CACHE_ISIZE(x) ((x) & 4095) |
| 251 | |
| 252 | #define CACHE_SIZE(y) (((y) >> 6) & 7) |
| 253 | #define CACHE_ASSOC(y) (((y) >> 3) & 7) |
| 254 | #define CACHE_M(y) ((y) & (1 << 2)) |
| 255 | #define CACHE_LINE(y) ((y) & 3) |
| 256 | |
| 257 | static inline void dump_cache(const char *prefix, int cpu, unsigned int cache) |
| 258 | { |
| 259 | unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); |
| 260 | |
| 261 | printk("CPU%u: %s: %d bytes, associativity %d, %d byte lines, %d sets\n", |
| 262 | cpu, prefix, |
| 263 | mult << (8 + CACHE_SIZE(cache)), |
| 264 | (mult << CACHE_ASSOC(cache)) >> 1, |
| 265 | 8 << CACHE_LINE(cache), |
| 266 | 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) - |
| 267 | CACHE_LINE(cache))); |
| 268 | } |
| 269 | |
| 270 | static void __init dump_cpu_info(int cpu) |
| 271 | { |
| 272 | unsigned int info = read_cpuid(CPUID_CACHETYPE); |
| 273 | |
| 274 | if (info != processor_id) { |
| 275 | printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT", |
| 276 | cache_types[CACHE_TYPE(info)]); |
| 277 | if (CACHE_S(info)) { |
| 278 | dump_cache("I cache", cpu, CACHE_ISIZE(info)); |
| 279 | dump_cache("D cache", cpu, CACHE_DSIZE(info)); |
| 280 | } else { |
| 281 | dump_cache("cache", cpu, CACHE_ISIZE(info)); |
| 282 | } |
| 283 | } |
Lennert Buytenhek | 23759dc | 2006-04-02 00:07:39 +0100 | [diff] [blame] | 284 | |
| 285 | if (arch_is_coherent()) |
| 286 | printk("Cache coherency enabled\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | int cpu_architecture(void) |
| 290 | { |
| 291 | int cpu_arch; |
| 292 | |
Catalin Marinas | 6b090a2 | 2006-01-12 16:28:16 +0000 | [diff] [blame] | 293 | if ((processor_id & 0x0008f000) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | cpu_arch = CPU_ARCH_UNKNOWN; |
Catalin Marinas | 6b090a2 | 2006-01-12 16:28:16 +0000 | [diff] [blame] | 295 | } else if ((processor_id & 0x0008f000) == 0x00007000) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3; |
Catalin Marinas | 6b090a2 | 2006-01-12 16:28:16 +0000 | [diff] [blame] | 297 | } else if ((processor_id & 0x00080000) == 0x00000000) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | cpu_arch = (processor_id >> 16) & 7; |
| 299 | if (cpu_arch) |
| 300 | cpu_arch += CPU_ARCH_ARMv3; |
Catalin Marinas | 6b090a2 | 2006-01-12 16:28:16 +0000 | [diff] [blame] | 301 | } else { |
| 302 | /* the revised CPUID */ |
| 303 | cpu_arch = ((processor_id >> 12) & 0xf) - 0xb + CPU_ARCH_ARMv6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | return cpu_arch; |
| 307 | } |
| 308 | |
| 309 | /* |
| 310 | * These functions re-use the assembly code in head.S, which |
| 311 | * already provide the required functionality. |
| 312 | */ |
Russell King | 0f44ba1 | 2006-02-24 21:04:56 +0000 | [diff] [blame] | 313 | extern struct proc_info_list *lookup_processor_type(unsigned int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | extern struct machine_desc *lookup_machine_type(unsigned int); |
| 315 | |
| 316 | static void __init setup_processor(void) |
| 317 | { |
| 318 | struct proc_info_list *list; |
| 319 | |
| 320 | /* |
| 321 | * locate processor in the list of supported processor |
| 322 | * types. The linker builds this table for us from the |
| 323 | * entries in arch/arm/mm/proc-*.S |
| 324 | */ |
Russell King | 0f44ba1 | 2006-02-24 21:04:56 +0000 | [diff] [blame] | 325 | list = lookup_processor_type(processor_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | if (!list) { |
| 327 | printk("CPU configuration botched (ID %08x), unable " |
| 328 | "to continue.\n", processor_id); |
| 329 | while (1); |
| 330 | } |
| 331 | |
| 332 | cpu_name = list->cpu_name; |
| 333 | |
| 334 | #ifdef MULTI_CPU |
| 335 | processor = *list->proc; |
| 336 | #endif |
| 337 | #ifdef MULTI_TLB |
| 338 | cpu_tlb = *list->tlb; |
| 339 | #endif |
| 340 | #ifdef MULTI_USER |
| 341 | cpu_user = *list->user; |
| 342 | #endif |
| 343 | #ifdef MULTI_CACHE |
| 344 | cpu_cache = *list->cache; |
| 345 | #endif |
| 346 | |
| 347 | printk("CPU: %s [%08x] revision %d (ARMv%s)\n", |
| 348 | cpu_name, processor_id, (int)processor_id & 15, |
| 349 | proc_arch[cpu_architecture()]); |
| 350 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | sprintf(system_utsname.machine, "%s%c", list->arch_name, ENDIANNESS); |
| 352 | sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS); |
| 353 | elf_hwcap = list->elf_hwcap; |
Catalin Marinas | adeff42 | 2006-04-10 21:32:35 +0100 | [diff] [blame] | 354 | #ifndef CONFIG_ARM_THUMB |
| 355 | elf_hwcap &= ~HWCAP_THUMB; |
| 356 | #endif |
| 357 | #ifndef CONFIG_VFP |
| 358 | elf_hwcap &= ~HWCAP_VFP; |
| 359 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
| 361 | cpu_proc_init(); |
| 362 | } |
| 363 | |
Russell King | ccea7a1 | 2005-05-31 22:22:32 +0100 | [diff] [blame] | 364 | /* |
| 365 | * cpu_init - initialise one CPU. |
| 366 | * |
| 367 | * cpu_init dumps the cache information, initialises SMP specific |
| 368 | * information, and sets up the per-CPU stacks. |
| 369 | */ |
Russell King | 36c5ed2 | 2005-06-19 18:39:33 +0100 | [diff] [blame] | 370 | void cpu_init(void) |
Russell King | ccea7a1 | 2005-05-31 22:22:32 +0100 | [diff] [blame] | 371 | { |
| 372 | unsigned int cpu = smp_processor_id(); |
| 373 | struct stack *stk = &stacks[cpu]; |
| 374 | |
| 375 | if (cpu >= NR_CPUS) { |
| 376 | printk(KERN_CRIT "CPU%u: bad primary CPU number\n", cpu); |
| 377 | BUG(); |
| 378 | } |
| 379 | |
Russell King | 32f8b97 | 2005-11-06 19:49:21 +0000 | [diff] [blame] | 380 | if (system_state == SYSTEM_BOOTING) |
| 381 | dump_cpu_info(cpu); |
Russell King | ccea7a1 | 2005-05-31 22:22:32 +0100 | [diff] [blame] | 382 | |
| 383 | /* |
| 384 | * setup stacks for re-entrant exception handlers |
| 385 | */ |
| 386 | __asm__ ( |
| 387 | "msr cpsr_c, %1\n\t" |
| 388 | "add sp, %0, %2\n\t" |
| 389 | "msr cpsr_c, %3\n\t" |
| 390 | "add sp, %0, %4\n\t" |
| 391 | "msr cpsr_c, %5\n\t" |
| 392 | "add sp, %0, %6\n\t" |
| 393 | "msr cpsr_c, %7" |
| 394 | : |
| 395 | : "r" (stk), |
| 396 | "I" (PSR_F_BIT | PSR_I_BIT | IRQ_MODE), |
| 397 | "I" (offsetof(struct stack, irq[0])), |
| 398 | "I" (PSR_F_BIT | PSR_I_BIT | ABT_MODE), |
| 399 | "I" (offsetof(struct stack, abt[0])), |
| 400 | "I" (PSR_F_BIT | PSR_I_BIT | UND_MODE), |
| 401 | "I" (offsetof(struct stack, und[0])), |
Catalin Marinas | aaaa3f9 | 2005-06-29 15:34:39 +0100 | [diff] [blame] | 402 | "I" (PSR_F_BIT | PSR_I_BIT | SVC_MODE) |
| 403 | : "r14"); |
Russell King | ccea7a1 | 2005-05-31 22:22:32 +0100 | [diff] [blame] | 404 | } |
| 405 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | static struct machine_desc * __init setup_machine(unsigned int nr) |
| 407 | { |
| 408 | struct machine_desc *list; |
| 409 | |
| 410 | /* |
| 411 | * locate machine in the list of supported machines. |
| 412 | */ |
| 413 | list = lookup_machine_type(nr); |
| 414 | if (!list) { |
| 415 | printk("Machine configuration botched (nr %d), unable " |
| 416 | "to continue.\n", nr); |
| 417 | while (1); |
| 418 | } |
| 419 | |
| 420 | printk("Machine: %s\n", list->name); |
| 421 | |
| 422 | return list; |
| 423 | } |
| 424 | |
| 425 | static void __init early_initrd(char **p) |
| 426 | { |
| 427 | unsigned long start, size; |
| 428 | |
| 429 | start = memparse(*p, p); |
| 430 | if (**p == ',') { |
| 431 | size = memparse((*p) + 1, p); |
| 432 | |
| 433 | phys_initrd_start = start; |
| 434 | phys_initrd_size = size; |
| 435 | } |
| 436 | } |
| 437 | __early_param("initrd=", early_initrd); |
| 438 | |
Andrew Morton | 1c97b73 | 2006-04-20 21:41:18 +0100 | [diff] [blame] | 439 | static void __init arm_add_memory(unsigned long start, unsigned long size) |
Russell King | 3a66941 | 2005-06-22 21:43:10 +0100 | [diff] [blame] | 440 | { |
| 441 | /* |
| 442 | * Ensure that start/size are aligned to a page boundary. |
| 443 | * Size is appropriately rounded down, start is rounded up. |
| 444 | */ |
| 445 | size -= start & ~PAGE_MASK; |
| 446 | |
| 447 | meminfo.bank[meminfo.nr_banks].start = PAGE_ALIGN(start); |
| 448 | meminfo.bank[meminfo.nr_banks].size = size & PAGE_MASK; |
| 449 | meminfo.bank[meminfo.nr_banks].node = PHYS_TO_NID(start); |
| 450 | meminfo.nr_banks += 1; |
| 451 | } |
| 452 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | /* |
| 454 | * Pick out the memory size. We look for mem=size@start, |
| 455 | * where start and size are "size[KkMm]" |
| 456 | */ |
| 457 | static void __init early_mem(char **p) |
| 458 | { |
| 459 | static int usermem __initdata = 0; |
| 460 | unsigned long size, start; |
| 461 | |
| 462 | /* |
| 463 | * If the user specifies memory size, we |
| 464 | * blow away any automatically generated |
| 465 | * size. |
| 466 | */ |
| 467 | if (usermem == 0) { |
| 468 | usermem = 1; |
| 469 | meminfo.nr_banks = 0; |
| 470 | } |
| 471 | |
| 472 | start = PHYS_OFFSET; |
| 473 | size = memparse(*p, p); |
| 474 | if (**p == '@') |
| 475 | start = memparse(*p + 1, p); |
| 476 | |
Andrew Morton | 1c97b73 | 2006-04-20 21:41:18 +0100 | [diff] [blame] | 477 | arm_add_memory(start, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | } |
| 479 | __early_param("mem=", early_mem); |
| 480 | |
| 481 | /* |
| 482 | * Initial parsing of the command line. |
| 483 | */ |
| 484 | static void __init parse_cmdline(char **cmdline_p, char *from) |
| 485 | { |
| 486 | char c = ' ', *to = command_line; |
| 487 | int len = 0; |
| 488 | |
| 489 | for (;;) { |
| 490 | if (c == ' ') { |
| 491 | extern struct early_params __early_begin, __early_end; |
| 492 | struct early_params *p; |
| 493 | |
| 494 | for (p = &__early_begin; p < &__early_end; p++) { |
| 495 | int len = strlen(p->arg); |
| 496 | |
| 497 | if (memcmp(from, p->arg, len) == 0) { |
| 498 | if (to != command_line) |
| 499 | to -= 1; |
| 500 | from += len; |
| 501 | p->fn(&from); |
| 502 | |
| 503 | while (*from != ' ' && *from != '\0') |
| 504 | from++; |
| 505 | break; |
| 506 | } |
| 507 | } |
| 508 | } |
| 509 | c = *from++; |
| 510 | if (!c) |
| 511 | break; |
| 512 | if (COMMAND_LINE_SIZE <= ++len) |
| 513 | break; |
| 514 | *to++ = c; |
| 515 | } |
| 516 | *to = '\0'; |
| 517 | *cmdline_p = command_line; |
| 518 | } |
| 519 | |
| 520 | static void __init |
| 521 | setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz) |
| 522 | { |
| 523 | #ifdef CONFIG_BLK_DEV_RAM |
| 524 | extern int rd_size, rd_image_start, rd_prompt, rd_doload; |
| 525 | |
| 526 | rd_image_start = image_start; |
| 527 | rd_prompt = prompt; |
| 528 | rd_doload = doload; |
| 529 | |
| 530 | if (rd_sz) |
| 531 | rd_size = rd_sz; |
| 532 | #endif |
| 533 | } |
| 534 | |
| 535 | static void __init |
| 536 | request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc) |
| 537 | { |
| 538 | struct resource *res; |
| 539 | int i; |
| 540 | |
| 541 | kernel_code.start = virt_to_phys(&_text); |
| 542 | kernel_code.end = virt_to_phys(&_etext - 1); |
| 543 | kernel_data.start = virt_to_phys(&__data_start); |
| 544 | kernel_data.end = virt_to_phys(&_end - 1); |
| 545 | |
| 546 | for (i = 0; i < mi->nr_banks; i++) { |
| 547 | unsigned long virt_start, virt_end; |
| 548 | |
| 549 | if (mi->bank[i].size == 0) |
| 550 | continue; |
| 551 | |
| 552 | virt_start = __phys_to_virt(mi->bank[i].start); |
| 553 | virt_end = virt_start + mi->bank[i].size - 1; |
| 554 | |
| 555 | res = alloc_bootmem_low(sizeof(*res)); |
| 556 | res->name = "System RAM"; |
| 557 | res->start = __virt_to_phys(virt_start); |
| 558 | res->end = __virt_to_phys(virt_end); |
| 559 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
| 560 | |
| 561 | request_resource(&iomem_resource, res); |
| 562 | |
| 563 | if (kernel_code.start >= res->start && |
| 564 | kernel_code.end <= res->end) |
| 565 | request_resource(res, &kernel_code); |
| 566 | if (kernel_data.start >= res->start && |
| 567 | kernel_data.end <= res->end) |
| 568 | request_resource(res, &kernel_data); |
| 569 | } |
| 570 | |
| 571 | if (mdesc->video_start) { |
| 572 | video_ram.start = mdesc->video_start; |
| 573 | video_ram.end = mdesc->video_end; |
| 574 | request_resource(&iomem_resource, &video_ram); |
| 575 | } |
| 576 | |
| 577 | /* |
| 578 | * Some machines don't have the possibility of ever |
| 579 | * possessing lp0, lp1 or lp2 |
| 580 | */ |
| 581 | if (mdesc->reserve_lp0) |
| 582 | request_resource(&ioport_resource, &lp0); |
| 583 | if (mdesc->reserve_lp1) |
| 584 | request_resource(&ioport_resource, &lp1); |
| 585 | if (mdesc->reserve_lp2) |
| 586 | request_resource(&ioport_resource, &lp2); |
| 587 | } |
| 588 | |
| 589 | /* |
| 590 | * Tag parsing. |
| 591 | * |
| 592 | * This is the new way of passing data to the kernel at boot time. Rather |
| 593 | * than passing a fixed inflexible structure to the kernel, we pass a list |
| 594 | * of variable-sized tags to the kernel. The first tag must be a ATAG_CORE |
| 595 | * tag for the list to be recognised (to distinguish the tagged list from |
| 596 | * a param_struct). The list is terminated with a zero-length tag (this tag |
| 597 | * is not parsed in any way). |
| 598 | */ |
| 599 | static int __init parse_tag_core(const struct tag *tag) |
| 600 | { |
| 601 | if (tag->hdr.size > 2) { |
| 602 | if ((tag->u.core.flags & 1) == 0) |
| 603 | root_mountflags &= ~MS_RDONLY; |
| 604 | ROOT_DEV = old_decode_dev(tag->u.core.rootdev); |
| 605 | } |
| 606 | return 0; |
| 607 | } |
| 608 | |
| 609 | __tagtable(ATAG_CORE, parse_tag_core); |
| 610 | |
| 611 | static int __init parse_tag_mem32(const struct tag *tag) |
| 612 | { |
| 613 | if (meminfo.nr_banks >= NR_BANKS) { |
| 614 | printk(KERN_WARNING |
| 615 | "Ignoring memory bank 0x%08x size %dKB\n", |
| 616 | tag->u.mem.start, tag->u.mem.size / 1024); |
| 617 | return -EINVAL; |
| 618 | } |
Andrew Morton | 1c97b73 | 2006-04-20 21:41:18 +0100 | [diff] [blame] | 619 | arm_add_memory(tag->u.mem.start, tag->u.mem.size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | return 0; |
| 621 | } |
| 622 | |
| 623 | __tagtable(ATAG_MEM, parse_tag_mem32); |
| 624 | |
| 625 | #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) |
| 626 | struct screen_info screen_info = { |
| 627 | .orig_video_lines = 30, |
| 628 | .orig_video_cols = 80, |
| 629 | .orig_video_mode = 0, |
| 630 | .orig_video_ega_bx = 0, |
| 631 | .orig_video_isVGA = 1, |
| 632 | .orig_video_points = 8 |
| 633 | }; |
| 634 | |
| 635 | static int __init parse_tag_videotext(const struct tag *tag) |
| 636 | { |
| 637 | screen_info.orig_x = tag->u.videotext.x; |
| 638 | screen_info.orig_y = tag->u.videotext.y; |
| 639 | screen_info.orig_video_page = tag->u.videotext.video_page; |
| 640 | screen_info.orig_video_mode = tag->u.videotext.video_mode; |
| 641 | screen_info.orig_video_cols = tag->u.videotext.video_cols; |
| 642 | screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx; |
| 643 | screen_info.orig_video_lines = tag->u.videotext.video_lines; |
| 644 | screen_info.orig_video_isVGA = tag->u.videotext.video_isvga; |
| 645 | screen_info.orig_video_points = tag->u.videotext.video_points; |
| 646 | return 0; |
| 647 | } |
| 648 | |
| 649 | __tagtable(ATAG_VIDEOTEXT, parse_tag_videotext); |
| 650 | #endif |
| 651 | |
| 652 | static int __init parse_tag_ramdisk(const struct tag *tag) |
| 653 | { |
| 654 | setup_ramdisk((tag->u.ramdisk.flags & 1) == 0, |
| 655 | (tag->u.ramdisk.flags & 2) == 0, |
| 656 | tag->u.ramdisk.start, tag->u.ramdisk.size); |
| 657 | return 0; |
| 658 | } |
| 659 | |
| 660 | __tagtable(ATAG_RAMDISK, parse_tag_ramdisk); |
| 661 | |
| 662 | static int __init parse_tag_initrd(const struct tag *tag) |
| 663 | { |
| 664 | printk(KERN_WARNING "ATAG_INITRD is deprecated; " |
| 665 | "please update your bootloader.\n"); |
| 666 | phys_initrd_start = __virt_to_phys(tag->u.initrd.start); |
| 667 | phys_initrd_size = tag->u.initrd.size; |
| 668 | return 0; |
| 669 | } |
| 670 | |
| 671 | __tagtable(ATAG_INITRD, parse_tag_initrd); |
| 672 | |
| 673 | static int __init parse_tag_initrd2(const struct tag *tag) |
| 674 | { |
| 675 | phys_initrd_start = tag->u.initrd.start; |
| 676 | phys_initrd_size = tag->u.initrd.size; |
| 677 | return 0; |
| 678 | } |
| 679 | |
| 680 | __tagtable(ATAG_INITRD2, parse_tag_initrd2); |
| 681 | |
| 682 | static int __init parse_tag_serialnr(const struct tag *tag) |
| 683 | { |
| 684 | system_serial_low = tag->u.serialnr.low; |
| 685 | system_serial_high = tag->u.serialnr.high; |
| 686 | return 0; |
| 687 | } |
| 688 | |
| 689 | __tagtable(ATAG_SERIAL, parse_tag_serialnr); |
| 690 | |
| 691 | static int __init parse_tag_revision(const struct tag *tag) |
| 692 | { |
| 693 | system_rev = tag->u.revision.rev; |
| 694 | return 0; |
| 695 | } |
| 696 | |
| 697 | __tagtable(ATAG_REVISION, parse_tag_revision); |
| 698 | |
| 699 | static int __init parse_tag_cmdline(const struct tag *tag) |
| 700 | { |
| 701 | strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE); |
| 702 | return 0; |
| 703 | } |
| 704 | |
| 705 | __tagtable(ATAG_CMDLINE, parse_tag_cmdline); |
| 706 | |
| 707 | /* |
| 708 | * Scan the tag table for this tag, and call its parse function. |
| 709 | * The tag table is built by the linker from all the __tagtable |
| 710 | * declarations. |
| 711 | */ |
| 712 | static int __init parse_tag(const struct tag *tag) |
| 713 | { |
| 714 | extern struct tagtable __tagtable_begin, __tagtable_end; |
| 715 | struct tagtable *t; |
| 716 | |
| 717 | for (t = &__tagtable_begin; t < &__tagtable_end; t++) |
| 718 | if (tag->hdr.tag == t->tag) { |
| 719 | t->parse(tag); |
| 720 | break; |
| 721 | } |
| 722 | |
| 723 | return t < &__tagtable_end; |
| 724 | } |
| 725 | |
| 726 | /* |
| 727 | * Parse all tags in the list, checking both the global and architecture |
| 728 | * specific tag tables. |
| 729 | */ |
| 730 | static void __init parse_tags(const struct tag *t) |
| 731 | { |
| 732 | for (; t->hdr.size; t = tag_next(t)) |
| 733 | if (!parse_tag(t)) |
| 734 | printk(KERN_WARNING |
| 735 | "Ignoring unrecognised tag 0x%08x\n", |
| 736 | t->hdr.tag); |
| 737 | } |
| 738 | |
| 739 | /* |
| 740 | * This holds our defaults. |
| 741 | */ |
| 742 | static struct init_tags { |
| 743 | struct tag_header hdr1; |
| 744 | struct tag_core core; |
| 745 | struct tag_header hdr2; |
| 746 | struct tag_mem32 mem; |
| 747 | struct tag_header hdr3; |
| 748 | } init_tags __initdata = { |
| 749 | { tag_size(tag_core), ATAG_CORE }, |
| 750 | { 1, PAGE_SIZE, 0xff }, |
| 751 | { tag_size(tag_mem32), ATAG_MEM }, |
| 752 | { MEM_SIZE, PHYS_OFFSET }, |
| 753 | { 0, ATAG_NONE } |
| 754 | }; |
| 755 | |
| 756 | static void (*init_machine)(void) __initdata; |
| 757 | |
| 758 | static int __init customize_machine(void) |
| 759 | { |
| 760 | /* customizes platform devices, or adds new ones */ |
| 761 | if (init_machine) |
| 762 | init_machine(); |
| 763 | return 0; |
| 764 | } |
| 765 | arch_initcall(customize_machine); |
| 766 | |
| 767 | void __init setup_arch(char **cmdline_p) |
| 768 | { |
| 769 | struct tag *tags = (struct tag *)&init_tags; |
| 770 | struct machine_desc *mdesc; |
| 771 | char *from = default_command_line; |
| 772 | |
| 773 | setup_processor(); |
| 774 | mdesc = setup_machine(machine_arch_type); |
| 775 | machine_name = mdesc->name; |
| 776 | |
| 777 | if (mdesc->soft_reboot) |
| 778 | reboot_setup("s"); |
| 779 | |
Russell King | f9bd6ea | 2005-07-04 10:43:36 +0100 | [diff] [blame] | 780 | if (mdesc->boot_params) |
| 781 | tags = phys_to_virt(mdesc->boot_params); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | |
| 783 | /* |
| 784 | * If we have the old style parameters, convert them to |
| 785 | * a tag list. |
| 786 | */ |
| 787 | if (tags->hdr.tag != ATAG_CORE) |
| 788 | convert_to_tag_list(tags); |
| 789 | if (tags->hdr.tag != ATAG_CORE) |
| 790 | tags = (struct tag *)&init_tags; |
| 791 | |
| 792 | if (mdesc->fixup) |
| 793 | mdesc->fixup(mdesc, tags, &from, &meminfo); |
| 794 | |
| 795 | if (tags->hdr.tag == ATAG_CORE) { |
| 796 | if (meminfo.nr_banks != 0) |
| 797 | squash_mem_tags(tags); |
| 798 | parse_tags(tags); |
| 799 | } |
| 800 | |
| 801 | init_mm.start_code = (unsigned long) &_text; |
| 802 | init_mm.end_code = (unsigned long) &_etext; |
| 803 | init_mm.end_data = (unsigned long) &_edata; |
| 804 | init_mm.brk = (unsigned long) &_end; |
| 805 | |
| 806 | memcpy(saved_command_line, from, COMMAND_LINE_SIZE); |
| 807 | saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; |
| 808 | parse_cmdline(cmdline_p, from); |
| 809 | paging_init(&meminfo, mdesc); |
| 810 | request_standard_resources(&meminfo, mdesc); |
| 811 | |
Russell King | 7bbb794 | 2006-02-16 11:08:09 +0000 | [diff] [blame] | 812 | #ifdef CONFIG_SMP |
| 813 | smp_init_cpus(); |
| 814 | #endif |
| 815 | |
Russell King | ccea7a1 | 2005-05-31 22:22:32 +0100 | [diff] [blame] | 816 | cpu_init(); |
| 817 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | /* |
| 819 | * Set up various architecture-specific pointers |
| 820 | */ |
| 821 | init_arch_irq = mdesc->init_irq; |
| 822 | system_timer = mdesc->timer; |
| 823 | init_machine = mdesc->init_machine; |
| 824 | |
| 825 | #ifdef CONFIG_VT |
| 826 | #if defined(CONFIG_VGA_CONSOLE) |
| 827 | conswitchp = &vga_con; |
| 828 | #elif defined(CONFIG_DUMMY_CONSOLE) |
| 829 | conswitchp = &dummy_con; |
| 830 | #endif |
| 831 | #endif |
| 832 | } |
| 833 | |
| 834 | |
| 835 | static int __init topology_init(void) |
| 836 | { |
| 837 | int cpu; |
| 838 | |
KAMEZAWA Hiroyuki | 036999d | 2006-04-20 21:48:02 +0100 | [diff] [blame] | 839 | for_each_possible_cpu(cpu) |
KAMEZAWA Hiroyuki | 76b67ed9 | 2006-06-27 02:53:41 -0700 | [diff] [blame] | 840 | register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | |
| 842 | return 0; |
| 843 | } |
| 844 | |
| 845 | subsys_initcall(topology_init); |
| 846 | |
| 847 | static const char *hwcap_str[] = { |
| 848 | "swp", |
| 849 | "half", |
| 850 | "thumb", |
| 851 | "26bit", |
| 852 | "fastmult", |
| 853 | "fpa", |
| 854 | "vfp", |
| 855 | "edsp", |
| 856 | "java", |
| 857 | NULL |
| 858 | }; |
| 859 | |
| 860 | static void |
| 861 | c_show_cache(struct seq_file *m, const char *type, unsigned int cache) |
| 862 | { |
| 863 | unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); |
| 864 | |
| 865 | seq_printf(m, "%s size\t\t: %d\n" |
| 866 | "%s assoc\t\t: %d\n" |
| 867 | "%s line length\t: %d\n" |
| 868 | "%s sets\t\t: %d\n", |
| 869 | type, mult << (8 + CACHE_SIZE(cache)), |
| 870 | type, (mult << CACHE_ASSOC(cache)) >> 1, |
| 871 | type, 8 << CACHE_LINE(cache), |
| 872 | type, 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) - |
| 873 | CACHE_LINE(cache))); |
| 874 | } |
| 875 | |
| 876 | static int c_show(struct seq_file *m, void *v) |
| 877 | { |
| 878 | int i; |
| 879 | |
| 880 | seq_printf(m, "Processor\t: %s rev %d (%s)\n", |
| 881 | cpu_name, (int)processor_id & 15, elf_platform); |
| 882 | |
| 883 | #if defined(CONFIG_SMP) |
| 884 | for_each_online_cpu(i) { |
Russell King | 1555972 | 2005-11-06 21:41:08 +0000 | [diff] [blame] | 885 | /* |
| 886 | * glibc reads /proc/cpuinfo to determine the number of |
| 887 | * online processors, looking for lines beginning with |
| 888 | * "processor". Give glibc what it expects. |
| 889 | */ |
| 890 | seq_printf(m, "processor\t: %d\n", i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n", |
| 892 | per_cpu(cpu_data, i).loops_per_jiffy / (500000UL/HZ), |
| 893 | (per_cpu(cpu_data, i).loops_per_jiffy / (5000UL/HZ)) % 100); |
| 894 | } |
| 895 | #else /* CONFIG_SMP */ |
| 896 | seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", |
| 897 | loops_per_jiffy / (500000/HZ), |
| 898 | (loops_per_jiffy / (5000/HZ)) % 100); |
| 899 | #endif |
| 900 | |
| 901 | /* dump out the processor features */ |
| 902 | seq_puts(m, "Features\t: "); |
| 903 | |
| 904 | for (i = 0; hwcap_str[i]; i++) |
| 905 | if (elf_hwcap & (1 << i)) |
| 906 | seq_printf(m, "%s ", hwcap_str[i]); |
| 907 | |
| 908 | seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24); |
| 909 | seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]); |
| 910 | |
Catalin Marinas | 6b090a2 | 2006-01-12 16:28:16 +0000 | [diff] [blame] | 911 | if ((processor_id & 0x0008f000) == 0x00000000) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | /* pre-ARM7 */ |
| 913 | seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4); |
| 914 | } else { |
Catalin Marinas | 6b090a2 | 2006-01-12 16:28:16 +0000 | [diff] [blame] | 915 | if ((processor_id & 0x0008f000) == 0x00007000) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | /* ARM7 */ |
| 917 | seq_printf(m, "CPU variant\t: 0x%02x\n", |
| 918 | (processor_id >> 16) & 127); |
| 919 | } else { |
| 920 | /* post-ARM7 */ |
| 921 | seq_printf(m, "CPU variant\t: 0x%x\n", |
| 922 | (processor_id >> 20) & 15); |
| 923 | } |
| 924 | seq_printf(m, "CPU part\t: 0x%03x\n", |
| 925 | (processor_id >> 4) & 0xfff); |
| 926 | } |
| 927 | seq_printf(m, "CPU revision\t: %d\n", processor_id & 15); |
| 928 | |
| 929 | { |
| 930 | unsigned int cache_info = read_cpuid(CPUID_CACHETYPE); |
| 931 | if (cache_info != processor_id) { |
| 932 | seq_printf(m, "Cache type\t: %s\n" |
| 933 | "Cache clean\t: %s\n" |
| 934 | "Cache lockdown\t: %s\n" |
| 935 | "Cache format\t: %s\n", |
| 936 | cache_types[CACHE_TYPE(cache_info)], |
| 937 | cache_clean[CACHE_TYPE(cache_info)], |
| 938 | cache_lockdown[CACHE_TYPE(cache_info)], |
| 939 | CACHE_S(cache_info) ? "Harvard" : "Unified"); |
| 940 | |
| 941 | if (CACHE_S(cache_info)) { |
| 942 | c_show_cache(m, "I", CACHE_ISIZE(cache_info)); |
| 943 | c_show_cache(m, "D", CACHE_DSIZE(cache_info)); |
| 944 | } else { |
| 945 | c_show_cache(m, "Cache", CACHE_ISIZE(cache_info)); |
| 946 | } |
| 947 | } |
| 948 | } |
| 949 | |
| 950 | seq_puts(m, "\n"); |
| 951 | |
| 952 | seq_printf(m, "Hardware\t: %s\n", machine_name); |
| 953 | seq_printf(m, "Revision\t: %04x\n", system_rev); |
| 954 | seq_printf(m, "Serial\t\t: %08x%08x\n", |
| 955 | system_serial_high, system_serial_low); |
| 956 | |
| 957 | return 0; |
| 958 | } |
| 959 | |
| 960 | static void *c_start(struct seq_file *m, loff_t *pos) |
| 961 | { |
| 962 | return *pos < 1 ? (void *)1 : NULL; |
| 963 | } |
| 964 | |
| 965 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) |
| 966 | { |
| 967 | ++*pos; |
| 968 | return NULL; |
| 969 | } |
| 970 | |
| 971 | static void c_stop(struct seq_file *m, void *v) |
| 972 | { |
| 973 | } |
| 974 | |
| 975 | struct seq_operations cpuinfo_op = { |
| 976 | .start = c_start, |
| 977 | .next = c_next, |
| 978 | .stop = c_stop, |
| 979 | .show = c_show |
| 980 | }; |