arch/x86_64/kernel/setup.c

   1 /*
   2  *  linux/arch/x86-64/kernel/setup.c
   3  *
   4  *  Copyright (C) 1995  Linus Torvalds
   5  *
   6  *  Nov 2001 Dave Jones <davej@suse.de>
   7  *  Forked from i386 setup code.
   8  *
   9  *  $Id$
  10  */
  11
  12 /*
  13  * This file handles the architecture-dependent parts of initialization
  14  */
  15
  16 #include <linux/errno.h>
  17 #include <linux/sched.h>
  18 #include <linux/kernel.h>
  19 #include <linux/mm.h>
  20 #include <linux/stddef.h>
  21 #include <linux/unistd.h>
  22 #include <linux/ptrace.h>
  23 #include <linux/slab.h>
  24 #include <linux/user.h>
  25 #include <linux/a.out.h>
  26 #include <linux/tty.h>
  27 #include <linux/ioport.h>
  28 #include <linux/delay.h>
  29 #include <linux/config.h>
  30 #include <linux/init.h>
  31 #include <linux/initrd.h>
  32 #include <linux/highmem.h>
  33 #include <linux/bootmem.h>
  34 #include <linux/module.h>
  35 #include <asm/processor.h>
  36 #include <linux/console.h>
  37 #include <linux/seq_file.h>
  38 #include <linux/root_dev.h>
  39 #include <linux/pci.h>
  40 #include <linux/acpi.h>
  41 #include <linux/kallsyms.h>
  42 #include <linux/edd.h>
  43 #include <linux/mmzone.h>
  44 #include <linux/kexec.h>
  45
  46 #include <asm/mtrr.h>
  47 #include <asm/uaccess.h>
  48 #include <asm/system.h>
  49 #include <asm/io.h>
  50 #include <asm/smp.h>
  51 #include <asm/msr.h>
  52 #include <asm/desc.h>
  53 #include <video/edid.h>
  54 #include <asm/e820.h>
  55 #include <asm/dma.h>
  56 #include <asm/mpspec.h>
  57 #include <asm/mmu_context.h>
  58 #include <asm/bootsetup.h>
  59 #include <asm/proto.h>
  60 #include <asm/setup.h>
  61 #include <asm/mach_apic.h>
  62 #include <asm/numa.h>
  63
  64 /*
  65  * Machine setup..
  66  */
  67
  68 struct cpuinfo_x86 boot_cpu_data;
  69
  70 unsigned long mmu_cr4_features;
  71
  72 int acpi_disabled;
  73 EXPORT_SYMBOL(acpi_disabled);
  74 #ifdef  CONFIG_ACPI_BOOT
  75 extern int __initdata acpi_ht;
  76 extern acpi_interrupt_flags     acpi_sci_flags;
  77 int __initdata acpi_force = 0;
  78 #endif
  79
  80 int acpi_numa __initdata;
  81
  82 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
  83 int bootloader_type;
  84
  85 unsigned long saved_video_mode;
  86
  87 #ifdef CONFIG_SWIOTLB
  88 int swiotlb;
  89 EXPORT_SYMBOL(swiotlb);
  90 #endif
  91
  92 /*
  93  * Setup options
  94  */
  95 struct drive_info_struct { char dummy[32]; } drive_info;
  96 struct screen_info screen_info;
  97 struct sys_desc_table_struct {
  98         unsigned short length;
  99         unsigned char table[0];
 100 };
 101
 102 struct edid_info edid_info;
 103 struct e820map e820;
 104
 105 extern int root_mountflags;
 106 extern char _text, _etext, _edata, _end;
 107
 108 char command_line[COMMAND_LINE_SIZE];
 109
 110 struct resource standard_io_resources[] = {
 111         { .name = "dma1", .start = 0x00, .end = 0x1f,
 112                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 113         { .name = "pic1", .start = 0x20, .end = 0x21,
 114                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 115         { .name = "timer0", .start = 0x40, .end = 0x43,
 116                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 117         { .name = "timer1", .start = 0x50, .end = 0x53,
 118                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 119         { .name = "keyboard", .start = 0x60, .end = 0x6f,
 120                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 121         { .name = "dma page reg", .start = 0x80, .end = 0x8f,
 122                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 123         { .name = "pic2", .start = 0xa0, .end = 0xa1,
 124                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 125         { .name = "dma2", .start = 0xc0, .end = 0xdf,
 126                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 127         { .name = "fpu", .start = 0xf0, .end = 0xff,
 128                 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
 129 };
 130
 131 #define STANDARD_IO_RESOURCES \
 132         (sizeof standard_io_resources / sizeof standard_io_resources[0])
 133
 134 #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
 135
 136 struct resource data_resource = {
 137         .name = "Kernel data",
 138         .start = 0,
 139         .end = 0,
 140         .flags = IORESOURCE_RAM,
 141 };
 142 struct resource code_resource = {
 143         .name = "Kernel code",
 144         .start = 0,
 145         .end = 0,
 146         .flags = IORESOURCE_RAM,
 147 };
 148
 149 #define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)
 150
 151 static struct resource system_rom_resource = {
 152         .name = "System ROM",
 153         .start = 0xf0000,
 154         .end = 0xfffff,
 155         .flags = IORESOURCE_ROM,
 156 };
 157
 158 static struct resource extension_rom_resource = {
 159         .name = "Extension ROM",
 160         .start = 0xe0000,
 161         .end = 0xeffff,
 162         .flags = IORESOURCE_ROM,
 163 };
 164
 165 static struct resource adapter_rom_resources[] = {
 166         { .name = "Adapter ROM", .start = 0xc8000, .end = 0,
 167                 .flags = IORESOURCE_ROM },
 168         { .name = "Adapter ROM", .start = 0, .end = 0,
 169                 .flags = IORESOURCE_ROM },
 170         { .name = "Adapter ROM", .start = 0, .end = 0,
 171                 .flags = IORESOURCE_ROM },
 172         { .name = "Adapter ROM", .start = 0, .end = 0,
 173                 .flags = IORESOURCE_ROM },
 174         { .name = "Adapter ROM", .start = 0, .end = 0,
 175                 .flags = IORESOURCE_ROM },
 176         { .name = "Adapter ROM", .start = 0, .end = 0,
 177                 .flags = IORESOURCE_ROM }
 178 };
 179
 180 #define ADAPTER_ROM_RESOURCES \
 181         (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
 182
 183 static struct resource video_rom_resource = {
 184         .name = "Video ROM",
 185         .start = 0xc0000,
 186         .end = 0xc7fff,
 187         .flags = IORESOURCE_ROM,
 188 };
 189
 190 static struct resource video_ram_resource = {
 191         .name = "Video RAM area",
 192         .start = 0xa0000,
 193         .end = 0xbffff,
 194         .flags = IORESOURCE_RAM,
 195 };
 196
 197 #define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
 198
 199 static int __init romchecksum(unsigned char *rom, unsigned long length)
 200 {
 201         unsigned char *p, sum = 0;
 202
 203         for (p = rom; p < rom + length; p++)
 204                 sum += *p;
 205         return sum == 0;
 206 }
 207
 208 static void __init probe_roms(void)
 209 {
 210         unsigned long start, length, upper;
 211         unsigned char *rom;
 212         int           i;
 213
 214         /* video rom */
 215         upper = adapter_rom_resources[0].start;
 216         for (start = video_rom_resource.start; start < upper; start += 2048) {
 217                 rom = isa_bus_to_virt(start);
 218                 if (!romsignature(rom))
 219                         continue;
 220
 221                 video_rom_resource.start = start;
 222
 223                 /* 0 < length <= 0x7f * 512, historically */
 224                 length = rom[2] * 512;
 225
 226                 /* if checksum okay, trust length byte */
 227                 if (length && romchecksum(rom, length))
 228                         video_rom_resource.end = start + length - 1;
 229
 230                 request_resource(&iomem_resource, &video_rom_resource);
 231                 break;
 232                         }
 233
 234         start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
 235         if (start < upper)
 236                 start = upper;
 237
 238         /* system rom */
 239         request_resource(&iomem_resource, &system_rom_resource);
 240         upper = system_rom_resource.start;
 241
 242         /* check for extension rom (ignore length byte!) */
 243         rom = isa_bus_to_virt(extension_rom_resource.start);
 244         if (romsignature(rom)) {
 245                 length = extension_rom_resource.end - extension_rom_resource.start + 1;
 246                 if (romchecksum(rom, length)) {
 247                         request_resource(&iomem_resource, &extension_rom_resource);
 248                         upper = extension_rom_resource.start;
 249                 }
 250         }
 251
 252         /* check for adapter roms on 2k boundaries */
 253         for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
 254                 rom = isa_bus_to_virt(start);
 255                 if (!romsignature(rom))
 256                         continue;
 257
 258                 /* 0 < length <= 0x7f * 512, historically */
 259                 length = rom[2] * 512;
 260
 261                 /* but accept any length that fits if checksum okay */
 262                 if (!length || start + length > upper || !romchecksum(rom, length))
 263                         continue;
 264
 265                 adapter_rom_resources[i].start = start;
 266                 adapter_rom_resources[i].end = start + length - 1;
 267                 request_resource(&iomem_resource, &adapter_rom_resources[i]);
 268
 269                 start = adapter_rom_resources[i++].end & ~2047UL;
 270         }
 271 }
 272
 273 static __init void parse_cmdline_early (char ** cmdline_p)
 274 {
 275         char c = ' ', *to = command_line, *from = COMMAND_LINE;
 276         int len = 0;
 277
 278         /* Save unparsed command line copy for /proc/cmdline */
 279         memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
 280         saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
 281
 282         for (;;) {
 283                 if (c != ' ')
 284                         goto next_char;
 285
 286 #ifdef  CONFIG_SMP
 287                 /*
 288                  * If the BIOS enumerates physical processors before logical,
 289                  * maxcpus=N at enumeration-time can be used to disable HT.
 290                  */
 291                 else if (!memcmp(from, "maxcpus=", 8)) {
 292                         extern unsigned int maxcpus;
 293
 294                         maxcpus = simple_strtoul(from + 8, NULL, 0);
 295                 }
 296 #endif
 297 #ifdef CONFIG_ACPI_BOOT
 298                 /* "acpi=off" disables both ACPI table parsing and interpreter init */
 299                 if (!memcmp(from, "acpi=off", 8))
 300                         disable_acpi();
 301
 302                 if (!memcmp(from, "acpi=force", 10)) {
 303                         /* add later when we do DMI horrors: */
 304                         acpi_force = 1;
 305                         acpi_disabled = 0;
 306                 }
 307
 308                 /* acpi=ht just means: do ACPI MADT parsing
 309                    at bootup, but don't enable the full ACPI interpreter */
 310                 if (!memcmp(from, "acpi=ht", 7)) {
 311                         if (!acpi_force)
 312                                 disable_acpi();
 313                         acpi_ht = 1;
 314                 }
 315                 else if (!memcmp(from, "pci=noacpi", 10))
 316                         acpi_disable_pci();
 317                 else if (!memcmp(from, "acpi=noirq", 10))
 318                         acpi_noirq_set();
 319
 320                 else if (!memcmp(from, "acpi_sci=edge", 13))
 321                         acpi_sci_flags.trigger =  1;
 322                 else if (!memcmp(from, "acpi_sci=level", 14))
 323                         acpi_sci_flags.trigger = 3;
 324                 else if (!memcmp(from, "acpi_sci=high", 13))
 325                         acpi_sci_flags.polarity = 1;
 326                 else if (!memcmp(from, "acpi_sci=low", 12))
 327                         acpi_sci_flags.polarity = 3;
 328
 329                 /* acpi=strict disables out-of-spec workarounds */
 330                 else if (!memcmp(from, "acpi=strict", 11)) {
 331                         acpi_strict = 1;
 332                 }
 333 #ifdef CONFIG_X86_IO_APIC
 334                 else if (!memcmp(from, "acpi_skip_timer_override", 24))
 335                         acpi_skip_timer_override = 1;
 336 #endif
 337 #endif
 338
 339                 if (!memcmp(from, "nolapic", 7) ||
 340                     !memcmp(from, "disableapic", 11))
 341                         disable_apic = 1;
 342
 343                 if (!memcmp(from, "noapic", 6))
 344                         skip_ioapic_setup = 1;
 345
 346                 if (!memcmp(from, "apic", 4)) {
 347                         skip_ioapic_setup = 0;
 348                         ioapic_force = 1;
 349                 }
 350
 351                 if (!memcmp(from, "mem=", 4))
 352                         parse_memopt(from+4, &from);
 353
 354 #ifdef CONFIG_NUMA
 355                 if (!memcmp(from, "numa=", 5))
 356                         numa_setup(from+5);
 357 #endif
 358
 359 #ifdef CONFIG_GART_IOMMU
 360                 if (!memcmp(from,"iommu=",6)) {
 361                         iommu_setup(from+6);
 362                 }
 363 #endif
 364
 365                 if (!memcmp(from,"oops=panic", 10))
 366                         panic_on_oops = 1;
 367
 368                 if (!memcmp(from, "noexec=", 7))
 369                         nonx_setup(from + 7);
 370
 371 #ifdef CONFIG_KEXEC
 372                 /* crashkernel=size@addr specifies the location to reserve for
 373                  * a crash kernel.  By reserving this memory we guarantee
 374                  * that linux never set's it up as a DMA target.
 375                  * Useful for holding code to do something appropriate
 376                  * after a kernel panic.
 377                  */
 378                 else if (!memcmp(from, "crashkernel=", 12)) {
 379                         unsigned long size, base;
 380                         size = memparse(from+12, &from);
 381                         if (*from == '@') {
 382                                 base = memparse(from+1, &from);
 383                                 /* FIXME: Do I want a sanity check
 384                                  * to validate the memory range?
 385                                  */
 386                                 crashk_res.start = base;
 387                                 crashk_res.end   = base + size - 1;
 388                         }
 389                 }
 390 #endif
 391
 392         next_char:
 393                 c = *(from++);
 394                 if (!c)
 395                         break;
 396                 if (COMMAND_LINE_SIZE <= ++len)
 397                         break;
 398                 *(to++) = c;
 399         }
 400         *to = '\0';
 401         *cmdline_p = command_line;
 402 }
 403
 404 #ifndef CONFIG_NUMA
 405 static void __init
 406 contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
 407 {
 408         unsigned long bootmap_size, bootmap;
 409
 410         memory_present(0, start_pfn, end_pfn);
 411         bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
 412         bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
 413         if (bootmap == -1L)
 414                 panic("Cannot find bootmem map of size %ld\n",bootmap_size);
 415         bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
 416         e820_bootmem_free(NODE_DATA(0), 0, end_pfn << PAGE_SHIFT);
 417         reserve_bootmem(bootmap, bootmap_size);
 418 }
 419 #endif
 420
 421 /* Use inline assembly to define this because the nops are defined
 422    as inline assembly strings in the include files and we cannot
 423    get them easily into strings. */
 424 asm("\t.data\nk8nops: "
 425     K8_NOP1 K8_NOP2 K8_NOP3 K8_NOP4 K8_NOP5 K8_NOP6
 426     K8_NOP7 K8_NOP8);
 427
 428 extern unsigned char k8nops[];
 429 static unsigned char *k8_nops[ASM_NOP_MAX+1] = {
 430      NULL,
 431      k8nops,
 432      k8nops + 1,
 433      k8nops + 1 + 2,
 434      k8nops + 1 + 2 + 3,
 435      k8nops + 1 + 2 + 3 + 4,
 436      k8nops + 1 + 2 + 3 + 4 + 5,
 437      k8nops + 1 + 2 + 3 + 4 + 5 + 6,
 438      k8nops + 1 + 2 + 3 + 4 + 5 + 6 + 7,
 439 };
 440
 441 /* Replace instructions with better alternatives for this CPU type.
 442
 443    This runs before SMP is initialized to avoid SMP problems with
 444    self modifying code. This implies that assymetric systems where
 445    APs have less capabilities than the boot processor are not handled.
 446    In this case boot with "noreplacement". */
 447 void apply_alternatives(void *start, void *end)
 448 {
 449         struct alt_instr *a;
 450         int diff, i, k;
 451         for (a = start; (void *)a < end; a++) {
 452                 if (!boot_cpu_has(a->cpuid))
 453                         continue;
 454
 455                 BUG_ON(a->replacementlen > a->instrlen);
 456                 __inline_memcpy(a->instr, a->replacement, a->replacementlen);
 457                 diff = a->instrlen - a->replacementlen;
 458
 459                 /* Pad the rest with nops */
 460                 for (i = a->replacementlen; diff > 0; diff -= k, i += k) {
 461                         k = diff;
 462                         if (k > ASM_NOP_MAX)
 463                                 k = ASM_NOP_MAX;
 464                         __inline_memcpy(a->instr + i, k8_nops[k], k);
 465                 }
 466         }
 467 }
 468
 469 static int no_replacement __initdata = 0;
 470
 471 void __init alternative_instructions(void)
 472 {
 473         extern struct alt_instr __alt_instructions[], __alt_instructions_end[];
 474         if (no_replacement)
 475                 return;
 476         apply_alternatives(__alt_instructions, __alt_instructions_end);
 477 }
 478
 479 static int __init noreplacement_setup(char *s)
 480 {
 481      no_replacement = 1;
 482      return 0;
 483 }
 484
 485 __setup("noreplacement", noreplacement_setup);
 486
 487 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
 488 struct edd edd;
 489 #ifdef CONFIG_EDD_MODULE
 490 EXPORT_SYMBOL(edd);
 491 #endif
 492 /**
 493  * copy_edd() - Copy the BIOS EDD information
 494  *              from boot_params into a safe place.
 495  *
 496  */
 497 static inline void copy_edd(void)
 498 {
 499      memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
 500      memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
 501      edd.mbr_signature_nr = EDD_MBR_SIG_NR;
 502      edd.edd_info_nr = EDD_NR;
 503 }
 504 #else
 505 static inline void copy_edd(void)
 506 {
 507 }
 508 #endif
 509
 510 #define EBDA_ADDR_POINTER 0x40E
 511 static void __init reserve_ebda_region(void)
 512 {
 513         unsigned int addr;
 514         /**
 515          * there is a real-mode segmented pointer pointing to the
 516          * 4K EBDA area at 0x40E
 517          */
 518         addr = *(unsigned short *)phys_to_virt(EBDA_ADDR_POINTER);
 519         addr <<= 4;
 520         if (addr)
 521                 reserve_bootmem_generic(addr, PAGE_SIZE);
 522 }
 523
 524 void __init setup_arch(char **cmdline_p)
 525 {
 526         unsigned long kernel_end;
 527
 528         ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
 529         drive_info = DRIVE_INFO;
 530         screen_info = SCREEN_INFO;
 531         edid_info = EDID_INFO;
 532         saved_video_mode = SAVED_VIDEO_MODE;
 533         bootloader_type = LOADER_TYPE;
 534
 535 #ifdef CONFIG_BLK_DEV_RAM
 536         rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
 537         rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
 538         rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
 539 #endif
 540         setup_memory_region();
 541         copy_edd();
 542
 543         if (!MOUNT_ROOT_RDONLY)
 544                 root_mountflags &= ~MS_RDONLY;
 545         init_mm.start_code = (unsigned long) &_text;
 546         init_mm.end_code = (unsigned long) &_etext;
 547         init_mm.end_data = (unsigned long) &_edata;
 548         init_mm.brk = (unsigned long) &_end;
 549
 550         code_resource.start = virt_to_phys(&_text);
 551         code_resource.end = virt_to_phys(&_etext)-1;
 552         data_resource.start = virt_to_phys(&_etext);
 553         data_resource.end = virt_to_phys(&_edata)-1;
 554
 555         parse_cmdline_early(cmdline_p);
 556
 557         early_identify_cpu(&boot_cpu_data);
 558
 559         /*
 560          * partially used pages are not usable - thus
 561          * we are rounding upwards:
 562          */
 563         end_pfn = e820_end_of_ram();
 564
 565         check_efer();
 566
 567         init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
 568
 569 #ifdef CONFIG_ACPI_BOOT
 570         /*
 571          * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
 572          * Call this early for SRAT node setup.
 573          */
 574         acpi_boot_table_init();
 575 #endif
 576
 577 #ifdef CONFIG_ACPI_NUMA
 578         /*
 579          * Parse SRAT to discover nodes.
 580          */
 581         acpi_numa_init();
 582 #endif
 583
 584 #ifdef CONFIG_NUMA
 585         numa_initmem_init(0, end_pfn);
 586 #else
 587         contig_initmem_init(0, end_pfn);
 588 #endif
 589
 590         /* Reserve direct mapping */
 591         reserve_bootmem_generic(table_start << PAGE_SHIFT,
 592                                 (table_end - table_start) << PAGE_SHIFT);
 593
 594         /* reserve kernel */
 595         kernel_end = round_up(__pa_symbol(&_end),PAGE_SIZE);
 596         reserve_bootmem_generic(HIGH_MEMORY, kernel_end - HIGH_MEMORY);
 597
 598         /*
 599          * reserve physical page 0 - it's a special BIOS page on many boxes,
 600          * enabling clean reboots, SMP operation, laptop functions.
 601          */
 602         reserve_bootmem_generic(0, PAGE_SIZE);
 603
 604         /* reserve ebda region */
 605         reserve_ebda_region();
 606
 607 #ifdef CONFIG_SMP
 608         /*
 609          * But first pinch a few for the stack/trampoline stuff
 610          * FIXME: Don't need the extra page at 4K, but need to fix
 611          * trampoline before removing it. (see the GDT stuff)
 612          */
 613         reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);
 614
 615         /* Reserve SMP trampoline */
 616         reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
 617 #endif
 618
 619 #ifdef CONFIG_ACPI_SLEEP
 620        /*
 621         * Reserve low memory region for sleep support.
 622         */
 623        acpi_reserve_bootmem();
 624 #endif
 625 #ifdef CONFIG_X86_LOCAL_APIC
 626         /*
 627          * Find and reserve possible boot-time SMP configuration:
 628          */
 629         find_smp_config();
 630 #endif
 631 #ifdef CONFIG_BLK_DEV_INITRD
 632         if (LOADER_TYPE && INITRD_START) {
 633                 if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
 634                         reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
 635                         initrd_start =
 636                                 INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
 637                         initrd_end = initrd_start+INITRD_SIZE;
 638                 }
 639                 else {
 640                         printk(KERN_ERR "initrd extends beyond end of memory "
 641                             "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
 642                             (unsigned long)(INITRD_START + INITRD_SIZE),
 643                             (unsigned long)(end_pfn << PAGE_SHIFT));
 644                         initrd_start = 0;
 645                 }
 646         }
 647 #endif
 648
 649         sparse_init();
 650
 651 #ifdef CONFIG_KEXEC
 652         if (crashk_res.start != crashk_res.end) {
 653                 reserve_bootmem(crashk_res.start,
 654                         crashk_res.end - crashk_res.start + 1);
 655         }
 656 #endif
 657         paging_init();
 658
 659         check_ioapic();
 660
 661 #ifdef CONFIG_ACPI_BOOT
 662         /*
 663          * Read APIC and some other early information from ACPI tables.
 664          */
 665         acpi_boot_init();
 666 #endif
 667
 668 #ifdef CONFIG_X86_LOCAL_APIC
 669         /*
 670          * get boot-time SMP configuration:
 671          */
 672         if (smp_found_config)
 673                 get_smp_config();
 674         init_apic_mappings();
 675 #endif
 676
 677         /*
 678          * Request address space for all standard RAM and ROM resources
 679          * and also for regions reported as reserved by the e820.
 680          */
 681         probe_roms();
 682         e820_reserve_resources();
 683
 684         request_resource(&iomem_resource, &video_ram_resource);
 685
 686         {
 687         unsigned i;
 688         /* request I/O space for devices used on all i[345]86 PCs */
 689         for (i = 0; i < STANDARD_IO_RESOURCES; i++)
 690                 request_resource(&ioport_resource, &standard_io_resources[i]);
 691         }
 692
 693         e820_setup_gap();
 694
 695 #ifdef CONFIG_GART_IOMMU
 696        iommu_hole_init();
 697 #endif
 698
 699 #ifdef CONFIG_VT
 700 #if defined(CONFIG_VGA_CONSOLE)
 701         conswitchp = &vga_con;
 702 #elif defined(CONFIG_DUMMY_CONSOLE)
 703         conswitchp = &dummy_con;
 704 #endif
 705 #endif
 706 }
 707
 708 static int __cpuinit get_model_name(struct cpuinfo_x86 *c)
 709 {
 710         unsigned int *v;
 711
 712         if (c->extended_cpuid_level < 0x80000004)
 713                 return 0;
 714
 715         v = (unsigned int *) c->x86_model_id;
 716         cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
 717         cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
 718         cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
 719         c->x86_model_id[48] = 0;
 720         return 1;
 721 }
 722
 723
 724 static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
 725 {
 726         unsigned int n, dummy, eax, ebx, ecx, edx;
 727
 728         n = c->extended_cpuid_level;
 729
 730         if (n >= 0x80000005) {
 731                 cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
 732                 printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
 733                         edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
 734                 c->x86_cache_size=(ecx>>24)+(edx>>24);
 735                 /* On K8 L1 TLB is inclusive, so don't count it */
 736                 c->x86_tlbsize = 0;
 737         }
 738
 739         if (n >= 0x80000006) {
 740                 cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
 741                 ecx = cpuid_ecx(0x80000006);
 742                 c->x86_cache_size = ecx >> 16;
 743                 c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
 744
 745                 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
 746                 c->x86_cache_size, ecx & 0xFF);
 747         }
 748
 749         if (n >= 0x80000007)
 750                 cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power);
 751         if (n >= 0x80000008) {
 752                 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
 753                 c->x86_virt_bits = (eax >> 8) & 0xff;
 754                 c->x86_phys_bits = eax & 0xff;
 755         }
 756 }
 757
 758 /*
 759  * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
 760  * Assumes number of cores is a power of two.
 761  */
 762 static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
 763 {
 764 #ifdef CONFIG_SMP
 765         int cpu = smp_processor_id();
 766         int node = 0;
 767         unsigned bits;
 768
 769         bits = 0;
 770         while ((1 << bits) < c->x86_num_cores)
 771                 bits++;
 772
 773         /* Low order bits define the core id (index of core in socket) */
 774         cpu_core_id[cpu] = phys_proc_id[cpu] & ((1 << bits)-1);
 775         /* Convert the APIC ID into the socket ID */
 776         phys_proc_id[cpu] >>= bits;
 777
 778 #ifdef CONFIG_NUMA
 779         /* When an ACPI SRAT table is available use the mappings from SRAT
 780            instead. */
 781         if (acpi_numa <= 0) {
 782                 node = phys_proc_id[cpu];
 783                 if (!node_online(node))
 784                         node = first_node(node_online_map);
 785                 cpu_to_node[cpu] = node;
 786         } else {
 787                 node = cpu_to_node[cpu];
 788         }
 789 #endif
 790
 791         printk(KERN_INFO "CPU %d(%d) -> Node %d -> Core %d\n",
 792                         cpu, c->x86_num_cores, node, cpu_core_id[cpu]);
 793 #endif
 794 }
 795
 796 static int __init init_amd(struct cpuinfo_x86 *c)
 797 {
 798         int r;
 799         int level;
 800
 801         /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
 802            3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
 803         clear_bit(0*32+31, &c->x86_capability);
 804
 805         /* C-stepping K8? */
 806         level = cpuid_eax(1);
 807         if ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58)
 808                 set_bit(X86_FEATURE_K8_C, &c->x86_capability);
 809
 810         r = get_model_name(c);
 811         if (!r) {
 812                 switch (c->x86) {
 813                 case 15:
 814                         /* Should distinguish Models here, but this is only
 815                            a fallback anyways. */
 816                         strcpy(c->x86_model_id, "Hammer");
 817                         break;
 818                 }
 819         }
 820         display_cacheinfo(c);
 821
 822         if (c->extended_cpuid_level >= 0x80000008) {
 823                 c->x86_num_cores = (cpuid_ecx(0x80000008) & 0xff) + 1;
 824                 if (c->x86_num_cores & (c->x86_num_cores - 1))
 825                         c->x86_num_cores = 1;
 826
 827                 amd_detect_cmp(c);
 828         }
 829
 830         return r;
 831 }
 832
 833 static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
 834 {
 835 #ifdef CONFIG_SMP
 836         u32     eax, ebx, ecx, edx;
 837         int     index_msb, tmp;
 838         int     cpu = smp_processor_id();
 839
 840         if (!cpu_has(c, X86_FEATURE_HT) || cpu_has(c, X86_FEATURE_CMP_LEGACY))
 841                 return;
 842
 843         cpuid(1, &eax, &ebx, &ecx, &edx);
 844         smp_num_siblings = (ebx & 0xff0000) >> 16;
 845
 846         if (smp_num_siblings == 1) {
 847                 printk(KERN_INFO  "CPU: Hyper-Threading is disabled\n");
 848         } else if (smp_num_siblings > 1) {
 849                 index_msb = 31;
 850                 /*
 851                  * At this point we only support two siblings per
 852                  * processor package.
 853                  */
 854                 if (smp_num_siblings > NR_CPUS) {
 855                         printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
 856                         smp_num_siblings = 1;
 857                         return;
 858                 }
 859                 tmp = smp_num_siblings;
 860                 while ((tmp & 0x80000000 ) == 0) {
 861                         tmp <<=1 ;
 862                         index_msb--;
 863                 }
 864                 if (smp_num_siblings & (smp_num_siblings - 1))
 865                         index_msb++;
 866                 phys_proc_id[cpu] = phys_pkg_id(index_msb);
 867
 868                 printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",
 869                        phys_proc_id[cpu]);
 870
 871                 smp_num_siblings = smp_num_siblings / c->x86_num_cores;
 872
 873                 tmp = smp_num_siblings;
 874                 index_msb = 31;
 875                 while ((tmp & 0x80000000) == 0) {
 876                         tmp <<=1 ;
 877                         index_msb--;
 878                 }
 879                 if (smp_num_siblings & (smp_num_siblings - 1))
 880                         index_msb++;
 881
 882                 cpu_core_id[cpu] = phys_pkg_id(index_msb);
 883
 884                 if (c->x86_num_cores > 1)
 885                         printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
 886                                cpu_core_id[cpu]);
 887         }
 888 #endif
 889 }
 890
 891 /*
 892  * find out the number of processor cores on the die
 893  */
 894 static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
 895 {
 896         unsigned int eax;
 897
 898         if (c->cpuid_level < 4)
 899                 return 1;
 900
 901         __asm__("cpuid"
 902                 : "=a" (eax)
 903                 : "0" (4), "c" (0)
 904                 : "bx", "dx");
 905
 906         if (eax & 0x1f)
 907                 return ((eax >> 26) + 1);
 908         else
 909                 return 1;
 910 }
 911
 912 static void __cpuinit init_intel(struct cpuinfo_x86 *c)
 913 {
 914         /* Cache sizes */
 915         unsigned n;
 916
 917         init_intel_cacheinfo(c);
 918         n = c->extended_cpuid_level;
 919         if (n >= 0x80000008) {
 920                 unsigned eax = cpuid_eax(0x80000008);
 921                 c->x86_virt_bits = (eax >> 8) & 0xff;
 922                 c->x86_phys_bits = eax & 0xff;
 923         }
 924
 925         if (c->x86 == 15)
 926                 c->x86_cache_alignment = c->x86_clflush_size * 2;
 927         if (c->x86 >= 15)
 928                 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
 929         c->x86_num_cores = intel_num_cpu_cores(c);
 930 }
 931
 932 void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
 933 {
 934         char *v = c->x86_vendor_id;
 935
 936         if (!strcmp(v, "AuthenticAMD"))
 937                 c->x86_vendor = X86_VENDOR_AMD;
 938         else if (!strcmp(v, "GenuineIntel"))
 939                 c->x86_vendor = X86_VENDOR_INTEL;
 940         else
 941                 c->x86_vendor = X86_VENDOR_UNKNOWN;
 942 }
 943
 944 struct cpu_model_info {
 945         int vendor;
 946         int family;
 947         char *model_names[16];
 948 };
 949
 950 /* Do some early cpuid on the boot CPU to get some parameter that are
 951    needed before check_bugs. Everything advanced is in identify_cpu
 952    below. */
 953 void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
 954 {
 955         u32 tfms;
 956
 957         c->loops_per_jiffy = loops_per_jiffy;
 958         c->x86_cache_size = -1;
 959         c->x86_vendor = X86_VENDOR_UNKNOWN;
 960         c->x86_model = c->x86_mask = 0; /* So far unknown... */
 961         c->x86_vendor_id[0] = '\0'; /* Unset */
 962         c->x86_model_id[0] = '\0';  /* Unset */
 963         c->x86_clflush_size = 64;
 964         c->x86_cache_alignment = c->x86_clflush_size;
 965         c->x86_num_cores = 1;
 966         c->extended_cpuid_level = 0;
 967         memset(&c->x86_capability, 0, sizeof c->x86_capability);
 968
 969         /* Get vendor name */
 970         cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
 971               (unsigned int *)&c->x86_vendor_id[0],
 972               (unsigned int *)&c->x86_vendor_id[8],
 973               (unsigned int *)&c->x86_vendor_id[4]);
 974
 975         get_cpu_vendor(c);
 976
 977         /* Initialize the standard set of capabilities */
 978         /* Note that the vendor-specific code below might override */
 979
 980         /* Intel-defined flags: level 0x00000001 */
 981         if (c->cpuid_level >= 0x00000001) {
 982                 __u32 misc;
 983                 cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
 984                       &c->x86_capability[0]);
 985                 c->x86 = (tfms >> 8) & 0xf;
 986                 c->x86_model = (tfms >> 4) & 0xf;
 987                 c->x86_mask = tfms & 0xf;
 988                 if (c->x86 == 0xf) {
 989                         c->x86 += (tfms >> 20) & 0xff;
 990                         c->x86_model += ((tfms >> 16) & 0xF) << 4;
 991                 }
 992                 if (c->x86_capability[0] & (1<<19))
 993                         c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
 994         } else {
 995                 /* Have CPUID level 0 only - unheard of */
 996                 c->x86 = 4;
 997         }
 998
 999 #ifdef CONFIG_SMP
1000         phys_proc_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff;
1001 #endif
1002 }
1003
1004 /*
1005  * This does the hard work of actually picking apart the CPU stuff...
1006  */
1007 void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
1008 {
1009         int i;
1010         u32 xlvl;
1011
1012         early_identify_cpu(c);
1013
1014         /* AMD-defined flags: level 0x80000001 */
1015         xlvl = cpuid_eax(0x80000000);
1016         c->extended_cpuid_level = xlvl;
1017         if ((xlvl & 0xffff0000) == 0x80000000) {
1018                 if (xlvl >= 0x80000001) {
1019                         c->x86_capability[1] = cpuid_edx(0x80000001);
1020                         c->x86_capability[6] = cpuid_ecx(0x80000001);
1021                 }
1022                 if (xlvl >= 0x80000004)
1023                         get_model_name(c); /* Default name */
1024         }
1025
1026         /* Transmeta-defined flags: level 0x80860001 */
1027         xlvl = cpuid_eax(0x80860000);
1028         if ((xlvl & 0xffff0000) == 0x80860000) {
1029                 /* Don't set x86_cpuid_level here for now to not confuse. */
1030                 if (xlvl >= 0x80860001)
1031                         c->x86_capability[2] = cpuid_edx(0x80860001);
1032         }
1033
1034         /*
1035          * Vendor-specific initialization.  In this section we
1036          * canonicalize the feature flags, meaning if there are
1037          * features a certain CPU supports which CPUID doesn't
1038          * tell us, CPUID claiming incorrect flags, or other bugs,
1039          * we handle them here.
1040          *
1041          * At the end of this section, c->x86_capability better
1042          * indicate the features this CPU genuinely supports!
1043          */
1044         switch (c->x86_vendor) {
1045         case X86_VENDOR_AMD:
1046                 init_amd(c);
1047                 break;
1048
1049         case X86_VENDOR_INTEL:
1050                 init_intel(c);
1051                 break;
1052
1053         case X86_VENDOR_UNKNOWN:
1054         default:
1055                 display_cacheinfo(c);
1056                 break;
1057         }
1058
1059         select_idle_routine(c);
1060         detect_ht(c);
1061
1062         /*
1063          * On SMP, boot_cpu_data holds the common feature set between
1064          * all CPUs; so make sure that we indicate which features are
1065          * common between the CPUs.  The first time this routine gets
1066          * executed, c == &boot_cpu_data.
1067          */
1068         if (c != &boot_cpu_data) {
1069                 /* AND the already accumulated flags with these */
1070                 for (i = 0 ; i < NCAPINTS ; i++)
1071                         boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
1072         }
1073
1074 #ifdef CONFIG_X86_MCE
1075         mcheck_init(c);
1076 #endif
1077         if (c == &boot_cpu_data)
1078                 mtrr_bp_init();
1079         else
1080                 mtrr_ap_init();
1081 #ifdef CONFIG_NUMA
1082         numa_add_cpu(smp_processor_id());
1083 #endif
1084 }
1085
1086
1087 void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
1088 {
1089         if (c->x86_model_id[0])
1090                 printk("%s", c->x86_model_id);
1091
1092         if (c->x86_mask || c->cpuid_level >= 0)
1093                 printk(" stepping %02x\n", c->x86_mask);
1094         else
1095                 printk("\n");
1096 }
1097
1098 /*
1099  *      Get CPU information for use by the procfs.
1100  */
1101
1102 static int show_cpuinfo(struct seq_file *m, void *v)
1103 {
1104         struct cpuinfo_x86 *c = v;
1105
1106         /*
1107          * These flag bits must match the definitions in <asm/cpufeature.h>.
1108          * NULL means this bit is undefined or reserved; either way it doesn't
1109          * have meaning as far as Linux is concerned.  Note that it's important
1110          * to realize there is a difference between this table and CPUID -- if
1111          * applications want to get the raw CPUID data, they should access
1112          * /dev/cpu/<cpu_nr>/cpuid instead.
1113          */
1114         static char *x86_cap_flags[] = {
1115                 /* Intel-defined */
1116                 "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
1117                 "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
1118                 "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
1119                 "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL,
1120
1121                 /* AMD-defined */
1122                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1123                 NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
1124                 NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
1125                 NULL, "fxsr_opt", NULL, NULL, NULL, "lm", "3dnowext", "3dnow",
1126
1127                 /* Transmeta-defined */
1128                 "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
1129                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1130                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1131                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1132
1133                 /* Other (Linux-defined) */
1134                 "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
1135                 "constant_tsc", NULL, NULL,
1136                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1137                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1138                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1139
1140                 /* Intel-defined (#2) */
1141                 "pni", NULL, NULL, "monitor", "ds_cpl", NULL, NULL, "est",
1142                 "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
1143                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1144                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1145
1146                 /* VIA/Cyrix/Centaur-defined */
1147                 NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
1148                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1149                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1150                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1151
1152                 /* AMD-defined (#2) */
1153                 "lahf_lm", "cmp_legacy", NULL, NULL, NULL, NULL, NULL, NULL,
1154                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1155                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1156                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1157         };
1158         static char *x86_power_flags[] = {
1159                 "ts",   /* temperature sensor */
1160                 "fid",  /* frequency id control */
1161                 "vid",  /* voltage id control */
1162                 "ttp",  /* thermal trip */
1163                 "tm",
1164                 "stc"
1165         };
1166
1167
1168 #ifdef CONFIG_SMP
1169         if (!cpu_online(c-cpu_data))
1170                 return 0;
1171 #endif
1172
1173         seq_printf(m,"processor\t: %u\n"
1174                      "vendor_id\t: %s\n"
1175                      "cpu family\t: %d\n"
1176                      "model\t\t: %d\n"
1177                      "model name\t: %s\n",
1178                      (unsigned)(c-cpu_data),
1179                      c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
1180                      c->x86,
1181                      (int)c->x86_model,
1182                      c->x86_model_id[0] ? c->x86_model_id : "unknown");
1183
1184         if (c->x86_mask || c->cpuid_level >= 0)
1185                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
1186         else
1187                 seq_printf(m, "stepping\t: unknown\n");
1188
1189         if (cpu_has(c,X86_FEATURE_TSC)) {
1190                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
1191                              cpu_khz / 1000, (cpu_khz % 1000));
1192         }
1193
1194         /* Cache size */
1195         if (c->x86_cache_size >= 0)
1196                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
1197
1198 #ifdef CONFIG_SMP
1199         if (smp_num_siblings * c->x86_num_cores > 1) {
1200                 int cpu = c - cpu_data;
1201                 seq_printf(m, "physical id\t: %d\n", phys_proc_id[cpu]);
1202                 seq_printf(m, "siblings\t: %d\n",
1203                                 c->x86_num_cores * smp_num_siblings);
1204                 seq_printf(m, "core id\t\t: %d\n", cpu_core_id[cpu]);
1205                 seq_printf(m, "cpu cores\t: %d\n", c->x86_num_cores);
1206         }
1207 #endif
1208
1209         seq_printf(m,
1210                 "fpu\t\t: yes\n"
1211                 "fpu_exception\t: yes\n"
1212                 "cpuid level\t: %d\n"
1213                 "wp\t\t: yes\n"
1214                 "flags\t\t:",
1215                    c->cpuid_level);
1216
1217         {
1218                 int i;
1219                 for ( i = 0 ; i < 32*NCAPINTS ; i++ )
1220                         if ( test_bit(i, &c->x86_capability) &&
1221                              x86_cap_flags[i] != NULL )
1222                                 seq_printf(m, " %s", x86_cap_flags[i]);
1223         }
1224
1225         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
1226                    c->loops_per_jiffy/(500000/HZ),
1227                    (c->loops_per_jiffy/(5000/HZ)) % 100);
1228
1229         if (c->x86_tlbsize > 0)
1230                 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
1231         seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
1232         seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
1233
1234         seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
1235                    c->x86_phys_bits, c->x86_virt_bits);
1236
1237         seq_printf(m, "power management:");
1238         {
1239                 unsigned i;
1240                 for (i = 0; i < 32; i++)
1241                         if (c->x86_power & (1 << i)) {
1242                                 if (i < ARRAY_SIZE(x86_power_flags))
1243                                         seq_printf(m, " %s", x86_power_flags[i]);
1244                                 else
1245                                         seq_printf(m, " [%d]", i);
1246                         }
1247         }
1248
1249         seq_printf(m, "\n\n");
1250
1251         return 0;
1252 }
1253
1254 static void *c_start(struct seq_file *m, loff_t *pos)
1255 {
1256         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
1257 }
1258
1259 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1260 {
1261         ++*pos;
1262         return c_start(m, pos);
1263 }
1264
1265 static void c_stop(struct seq_file *m, void *v)
1266 {
1267 }
1268
1269 struct seq_operations cpuinfo_op = {
1270         .start =c_start,
1271         .next = c_next,
1272         .stop = c_stop,
1273         .show = show_cpuinfo,
1274 };