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/crash_dump.h>
  39 #include <linux/root_dev.h>
  40 #include <linux/pci.h>
  41 #include <linux/acpi.h>
  42 #include <linux/kallsyms.h>
  43 #include <linux/edd.h>
  44 #include <linux/mmzone.h>
  45 #include <linux/kexec.h>
  46 #include <linux/cpufreq.h>
  47 #include <linux/dmi.h>
  48 #include <linux/dma-mapping.h>
  49
  50 #include <asm/mtrr.h>
  51 #include <asm/uaccess.h>
  52 #include <asm/system.h>
  53 #include <asm/io.h>
  54 #include <asm/smp.h>
  55 #include <asm/msr.h>
  56 #include <asm/desc.h>
  57 #include <video/edid.h>
  58 #include <asm/e820.h>
  59 #include <asm/dma.h>
  60 #include <asm/mpspec.h>
  61 #include <asm/mmu_context.h>
  62 #include <asm/bootsetup.h>
  63 #include <asm/proto.h>
  64 #include <asm/setup.h>
  65 #include <asm/mach_apic.h>
  66 #include <asm/numa.h>
  67 #include <asm/swiotlb.h>
  68 #include <asm/sections.h>
  69 #include <asm/gart-mapping.h>
  70
  71 /*
  72  * Machine setup..
  73  */
  74
  75 struct cpuinfo_x86 boot_cpu_data __read_mostly;
  76
  77 unsigned long mmu_cr4_features;
  78
  79 int acpi_disabled;
  80 EXPORT_SYMBOL(acpi_disabled);
  81 #ifdef  CONFIG_ACPI
  82 extern int __initdata acpi_ht;
  83 extern acpi_interrupt_flags     acpi_sci_flags;
  84 int __initdata acpi_force = 0;
  85 #endif
  86
  87 int acpi_numa __initdata;
  88
  89 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
  90 int bootloader_type;
  91
  92 unsigned long saved_video_mode;
  93
  94 /*
  95  * Setup options
  96  */
  97 struct drive_info_struct { char dummy[32]; } drive_info;
  98 struct screen_info screen_info;
  99 struct sys_desc_table_struct {
 100         unsigned short length;
 101         unsigned char table[0];
 102 };
 103
 104 struct edid_info edid_info;
 105 struct e820map e820;
 106
 107 extern int root_mountflags;
 108
 109 char command_line[COMMAND_LINE_SIZE];
 110
 111 struct resource standard_io_resources[] = {
 112         { .name = "dma1", .start = 0x00, .end = 0x1f,
 113                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 114         { .name = "pic1", .start = 0x20, .end = 0x21,
 115                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 116         { .name = "timer0", .start = 0x40, .end = 0x43,
 117                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 118         { .name = "timer1", .start = 0x50, .end = 0x53,
 119                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 120         { .name = "keyboard", .start = 0x60, .end = 0x6f,
 121                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 122         { .name = "dma page reg", .start = 0x80, .end = 0x8f,
 123                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 124         { .name = "pic2", .start = 0xa0, .end = 0xa1,
 125                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 126         { .name = "dma2", .start = 0xc0, .end = 0xdf,
 127                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 128         { .name = "fpu", .start = 0xf0, .end = 0xff,
 129                 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
 130 };
 131
 132 #define STANDARD_IO_RESOURCES \
 133         (sizeof standard_io_resources / sizeof standard_io_resources[0])
 134
 135 #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
 136
 137 struct resource data_resource = {
 138         .name = "Kernel data",
 139         .start = 0,
 140         .end = 0,
 141         .flags = IORESOURCE_RAM,
 142 };
 143 struct resource code_resource = {
 144         .name = "Kernel code",
 145         .start = 0,
 146         .end = 0,
 147         .flags = IORESOURCE_RAM,
 148 };
 149
 150 #define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)
 151
 152 static struct resource system_rom_resource = {
 153         .name = "System ROM",
 154         .start = 0xf0000,
 155         .end = 0xfffff,
 156         .flags = IORESOURCE_ROM,
 157 };
 158
 159 static struct resource extension_rom_resource = {
 160         .name = "Extension ROM",
 161         .start = 0xe0000,
 162         .end = 0xeffff,
 163         .flags = IORESOURCE_ROM,
 164 };
 165
 166 static struct resource adapter_rom_resources[] = {
 167         { .name = "Adapter ROM", .start = 0xc8000, .end = 0,
 168                 .flags = IORESOURCE_ROM },
 169         { .name = "Adapter ROM", .start = 0, .end = 0,
 170                 .flags = IORESOURCE_ROM },
 171         { .name = "Adapter ROM", .start = 0, .end = 0,
 172                 .flags = IORESOURCE_ROM },
 173         { .name = "Adapter ROM", .start = 0, .end = 0,
 174                 .flags = IORESOURCE_ROM },
 175         { .name = "Adapter ROM", .start = 0, .end = 0,
 176                 .flags = IORESOURCE_ROM },
 177         { .name = "Adapter ROM", .start = 0, .end = 0,
 178                 .flags = IORESOURCE_ROM }
 179 };
 180
 181 #define ADAPTER_ROM_RESOURCES \
 182         (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
 183
 184 static struct resource video_rom_resource = {
 185         .name = "Video ROM",
 186         .start = 0xc0000,
 187         .end = 0xc7fff,
 188         .flags = IORESOURCE_ROM,
 189 };
 190
 191 static struct resource video_ram_resource = {
 192         .name = "Video RAM area",
 193         .start = 0xa0000,
 194         .end = 0xbffff,
 195         .flags = IORESOURCE_RAM,
 196 };
 197
 198 #define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
 199
 200 static int __init romchecksum(unsigned char *rom, unsigned long length)
 201 {
 202         unsigned char *p, sum = 0;
 203
 204         for (p = rom; p < rom + length; p++)
 205                 sum += *p;
 206         return sum == 0;
 207 }
 208
 209 static void __init probe_roms(void)
 210 {
 211         unsigned long start, length, upper;
 212         unsigned char *rom;
 213         int           i;
 214
 215         /* video rom */
 216         upper = adapter_rom_resources[0].start;
 217         for (start = video_rom_resource.start; start < upper; start += 2048) {
 218                 rom = isa_bus_to_virt(start);
 219                 if (!romsignature(rom))
 220                         continue;
 221
 222                 video_rom_resource.start = start;
 223
 224                 /* 0 < length <= 0x7f * 512, historically */
 225                 length = rom[2] * 512;
 226
 227                 /* if checksum okay, trust length byte */
 228                 if (length && romchecksum(rom, length))
 229                         video_rom_resource.end = start + length - 1;
 230
 231                 request_resource(&iomem_resource, &video_rom_resource);
 232                 break;
 233                         }
 234
 235         start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
 236         if (start < upper)
 237                 start = upper;
 238
 239         /* system rom */
 240         request_resource(&iomem_resource, &system_rom_resource);
 241         upper = system_rom_resource.start;
 242
 243         /* check for extension rom (ignore length byte!) */
 244         rom = isa_bus_to_virt(extension_rom_resource.start);
 245         if (romsignature(rom)) {
 246                 length = extension_rom_resource.end - extension_rom_resource.start + 1;
 247                 if (romchecksum(rom, length)) {
 248                         request_resource(&iomem_resource, &extension_rom_resource);
 249                         upper = extension_rom_resource.start;
 250                 }
 251         }
 252
 253         /* check for adapter roms on 2k boundaries */
 254         for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
 255                 rom = isa_bus_to_virt(start);
 256                 if (!romsignature(rom))
 257                         continue;
 258
 259                 /* 0 < length <= 0x7f * 512, historically */
 260                 length = rom[2] * 512;
 261
 262                 /* but accept any length that fits if checksum okay */
 263                 if (!length || start + length > upper || !romchecksum(rom, length))
 264                         continue;
 265
 266                 adapter_rom_resources[i].start = start;
 267                 adapter_rom_resources[i].end = start + length - 1;
 268                 request_resource(&iomem_resource, &adapter_rom_resources[i]);
 269
 270                 start = adapter_rom_resources[i++].end & ~2047UL;
 271         }
 272 }
 273
 274 static __init void parse_cmdline_early (char ** cmdline_p)
 275 {
 276         char c = ' ', *to = command_line, *from = COMMAND_LINE;
 277         int len = 0;
 278         int userdef = 0;
 279
 280         /* Save unparsed command line copy for /proc/cmdline */
 281         memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
 282         saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
 283
 284         for (;;) {
 285                 if (c != ' ')
 286                         goto next_char;
 287
 288 #ifdef  CONFIG_SMP
 289                 /*
 290                  * If the BIOS enumerates physical processors before logical,
 291                  * maxcpus=N at enumeration-time can be used to disable HT.
 292                  */
 293                 else if (!memcmp(from, "maxcpus=", 8)) {
 294                         extern unsigned int maxcpus;
 295
 296                         maxcpus = simple_strtoul(from + 8, NULL, 0);
 297                 }
 298 #endif
 299 #ifdef CONFIG_ACPI
 300                 /* "acpi=off" disables both ACPI table parsing and interpreter init */
 301                 if (!memcmp(from, "acpi=off", 8))
 302                         disable_acpi();
 303
 304                 if (!memcmp(from, "acpi=force", 10)) {
 305                         /* add later when we do DMI horrors: */
 306                         acpi_force = 1;
 307                         acpi_disabled = 0;
 308                 }
 309
 310                 /* acpi=ht just means: do ACPI MADT parsing
 311                    at bootup, but don't enable the full ACPI interpreter */
 312                 if (!memcmp(from, "acpi=ht", 7)) {
 313                         if (!acpi_force)
 314                                 disable_acpi();
 315                         acpi_ht = 1;
 316                 }
 317                 else if (!memcmp(from, "pci=noacpi", 10))
 318                         acpi_disable_pci();
 319                 else if (!memcmp(from, "acpi=noirq", 10))
 320                         acpi_noirq_set();
 321
 322                 else if (!memcmp(from, "acpi_sci=edge", 13))
 323                         acpi_sci_flags.trigger =  1;
 324                 else if (!memcmp(from, "acpi_sci=level", 14))
 325                         acpi_sci_flags.trigger = 3;
 326                 else if (!memcmp(from, "acpi_sci=high", 13))
 327                         acpi_sci_flags.polarity = 1;
 328                 else if (!memcmp(from, "acpi_sci=low", 12))
 329                         acpi_sci_flags.polarity = 3;
 330
 331                 /* acpi=strict disables out-of-spec workarounds */
 332                 else if (!memcmp(from, "acpi=strict", 11)) {
 333                         acpi_strict = 1;
 334                 }
 335 #ifdef CONFIG_X86_IO_APIC
 336                 else if (!memcmp(from, "acpi_skip_timer_override", 24))
 337                         acpi_skip_timer_override = 1;
 338 #endif
 339 #endif
 340
 341                 if (!memcmp(from, "disable_timer_pin_1", 19))
 342                         disable_timer_pin_1 = 1;
 343                 if (!memcmp(from, "enable_timer_pin_1", 18))
 344                         disable_timer_pin_1 = -1;
 345
 346                 if (!memcmp(from, "nolapic", 7) ||
 347                     !memcmp(from, "disableapic", 11))
 348                         disable_apic = 1;
 349
 350                 if (!memcmp(from, "noapic", 6))
 351                         skip_ioapic_setup = 1;
 352
 353                 /* Make sure to not confuse with apic= */
 354                 if (!memcmp(from, "apic", 4) &&
 355                         (from[4] == ' ' || from[4] == 0)) {
 356                         skip_ioapic_setup = 0;
 357                         ioapic_force = 1;
 358                 }
 359
 360                 if (!memcmp(from, "mem=", 4))
 361                         parse_memopt(from+4, &from);
 362
 363                 if (!memcmp(from, "memmap=", 7)) {
 364                         /* exactmap option is for used defined memory */
 365                         if (!memcmp(from+7, "exactmap", 8)) {
 366 #ifdef CONFIG_CRASH_DUMP
 367                                 /* If we are doing a crash dump, we
 368                                  * still need to know the real mem
 369                                  * size before original memory map is
 370                                  * reset.
 371                                  */
 372                                 saved_max_pfn = e820_end_of_ram();
 373 #endif
 374                                 from += 8+7;
 375                                 end_pfn_map = 0;
 376                                 e820.nr_map = 0;
 377                                 userdef = 1;
 378                         }
 379                         else {
 380                                 parse_memmapopt(from+7, &from);
 381                                 userdef = 1;
 382                         }
 383                 }
 384
 385 #ifdef CONFIG_NUMA
 386                 if (!memcmp(from, "numa=", 5))
 387                         numa_setup(from+5);
 388 #endif
 389
 390                 if (!memcmp(from,"iommu=",6)) {
 391                         iommu_setup(from+6);
 392                 }
 393
 394                 if (!memcmp(from,"oops=panic", 10))
 395                         panic_on_oops = 1;
 396
 397                 if (!memcmp(from, "noexec=", 7))
 398                         nonx_setup(from + 7);
 399
 400 #ifdef CONFIG_KEXEC
 401                 /* crashkernel=size@addr specifies the location to reserve for
 402                  * a crash kernel.  By reserving this memory we guarantee
 403                  * that linux never set's it up as a DMA target.
 404                  * Useful for holding code to do something appropriate
 405                  * after a kernel panic.
 406                  */
 407                 else if (!memcmp(from, "crashkernel=", 12)) {
 408                         unsigned long size, base;
 409                         size = memparse(from+12, &from);
 410                         if (*from == '@') {
 411                                 base = memparse(from+1, &from);
 412                                 /* FIXME: Do I want a sanity check
 413                                  * to validate the memory range?
 414                                  */
 415                                 crashk_res.start = base;
 416                                 crashk_res.end   = base + size - 1;
 417                         }
 418                 }
 419 #endif
 420
 421 #ifdef CONFIG_PROC_VMCORE
 422                 /* elfcorehdr= specifies the location of elf core header
 423                  * stored by the crashed kernel. This option will be passed
 424                  * by kexec loader to the capture kernel.
 425                  */
 426                 else if(!memcmp(from, "elfcorehdr=", 11))
 427                         elfcorehdr_addr = memparse(from+11, &from);
 428 #endif
 429         next_char:
 430                 c = *(from++);
 431                 if (!c)
 432                         break;
 433                 if (COMMAND_LINE_SIZE <= ++len)
 434                         break;
 435                 *(to++) = c;
 436         }
 437         if (userdef) {
 438                 printk(KERN_INFO "user-defined physical RAM map:\n");
 439                 e820_print_map("user");
 440         }
 441         *to = '\0';
 442         *cmdline_p = command_line;
 443 }
 444
 445 #ifndef CONFIG_NUMA
 446 static void __init
 447 contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
 448 {
 449         unsigned long bootmap_size, bootmap;
 450
 451         bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
 452         bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
 453         if (bootmap == -1L)
 454                 panic("Cannot find bootmem map of size %ld\n",bootmap_size);
 455         bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
 456         e820_bootmem_free(NODE_DATA(0), 0, end_pfn << PAGE_SHIFT);
 457         reserve_bootmem(bootmap, bootmap_size);
 458 }
 459 #endif
 460
 461 /* Use inline assembly to define this because the nops are defined
 462    as inline assembly strings in the include files and we cannot
 463    get them easily into strings. */
 464 asm("\t.data\nk8nops: "
 465     K8_NOP1 K8_NOP2 K8_NOP3 K8_NOP4 K8_NOP5 K8_NOP6
 466     K8_NOP7 K8_NOP8);
 467
 468 extern unsigned char k8nops[];
 469 static unsigned char *k8_nops[ASM_NOP_MAX+1] = {
 470      NULL,
 471      k8nops,
 472      k8nops + 1,
 473      k8nops + 1 + 2,
 474      k8nops + 1 + 2 + 3,
 475      k8nops + 1 + 2 + 3 + 4,
 476      k8nops + 1 + 2 + 3 + 4 + 5,
 477      k8nops + 1 + 2 + 3 + 4 + 5 + 6,
 478      k8nops + 1 + 2 + 3 + 4 + 5 + 6 + 7,
 479 };
 480
 481 extern char __vsyscall_0;
 482
 483 /* Replace instructions with better alternatives for this CPU type.
 484
 485    This runs before SMP is initialized to avoid SMP problems with
 486    self modifying code. This implies that assymetric systems where
 487    APs have less capabilities than the boot processor are not handled.
 488    In this case boot with "noreplacement". */
 489 void apply_alternatives(void *start, void *end)
 490 {
 491         struct alt_instr *a;
 492         int diff, i, k;
 493         for (a = start; (void *)a < end; a++) {
 494                 u8 *instr;
 495
 496                 if (!boot_cpu_has(a->cpuid))
 497                         continue;
 498
 499                 BUG_ON(a->replacementlen > a->instrlen);
 500                 instr = a->instr;
 501                 /* vsyscall code is not mapped yet. resolve it manually. */
 502                 if (instr >= (u8 *)VSYSCALL_START && instr < (u8*)VSYSCALL_END)
 503                         instr = __va(instr - (u8*)VSYSCALL_START + (u8*)__pa_symbol(&__vsyscall_0));
 504                 __inline_memcpy(instr, a->replacement, a->replacementlen);
 505                 diff = a->instrlen - a->replacementlen;
 506
 507                 /* Pad the rest with nops */
 508                 for (i = a->replacementlen; diff > 0; diff -= k, i += k) {
 509                         k = diff;
 510                         if (k > ASM_NOP_MAX)
 511                                 k = ASM_NOP_MAX;
 512                         __inline_memcpy(instr + i, k8_nops[k], k);
 513                 }
 514         }
 515 }
 516
 517 static int no_replacement __initdata = 0;
 518
 519 void __init alternative_instructions(void)
 520 {
 521         extern struct alt_instr __alt_instructions[], __alt_instructions_end[];
 522         if (no_replacement)
 523                 return;
 524         apply_alternatives(__alt_instructions, __alt_instructions_end);
 525 }
 526
 527 static int __init noreplacement_setup(char *s)
 528 {
 529      no_replacement = 1;
 530      return 0;
 531 }
 532
 533 __setup("noreplacement", noreplacement_setup);
 534
 535 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
 536 struct edd edd;
 537 #ifdef CONFIG_EDD_MODULE
 538 EXPORT_SYMBOL(edd);
 539 #endif
 540 /**
 541  * copy_edd() - Copy the BIOS EDD information
 542  *              from boot_params into a safe place.
 543  *
 544  */
 545 static inline void copy_edd(void)
 546 {
 547      memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
 548      memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
 549      edd.mbr_signature_nr = EDD_MBR_SIG_NR;
 550      edd.edd_info_nr = EDD_NR;
 551 }
 552 #else
 553 static inline void copy_edd(void)
 554 {
 555 }
 556 #endif
 557
 558 #define EBDA_ADDR_POINTER 0x40E
 559 static void __init reserve_ebda_region(void)
 560 {
 561         unsigned int addr;
 562         /**
 563          * there is a real-mode segmented pointer pointing to the
 564          * 4K EBDA area at 0x40E
 565          */
 566         addr = *(unsigned short *)phys_to_virt(EBDA_ADDR_POINTER);
 567         addr <<= 4;
 568         if (addr)
 569                 reserve_bootmem_generic(addr, PAGE_SIZE);
 570 }
 571
 572 void __init setup_arch(char **cmdline_p)
 573 {
 574         unsigned long kernel_end;
 575
 576         ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
 577         drive_info = DRIVE_INFO;
 578         screen_info = SCREEN_INFO;
 579         edid_info = EDID_INFO;
 580         saved_video_mode = SAVED_VIDEO_MODE;
 581         bootloader_type = LOADER_TYPE;
 582
 583 #ifdef CONFIG_BLK_DEV_RAM
 584         rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
 585         rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
 586         rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
 587 #endif
 588         setup_memory_region();
 589         copy_edd();
 590
 591         if (!MOUNT_ROOT_RDONLY)
 592                 root_mountflags &= ~MS_RDONLY;
 593         init_mm.start_code = (unsigned long) &_text;
 594         init_mm.end_code = (unsigned long) &_etext;
 595         init_mm.end_data = (unsigned long) &_edata;
 596         init_mm.brk = (unsigned long) &_end;
 597
 598         code_resource.start = virt_to_phys(&_text);
 599         code_resource.end = virt_to_phys(&_etext)-1;
 600         data_resource.start = virt_to_phys(&_etext);
 601         data_resource.end = virt_to_phys(&_edata)-1;
 602
 603         parse_cmdline_early(cmdline_p);
 604
 605         early_identify_cpu(&boot_cpu_data);
 606
 607         /*
 608          * partially used pages are not usable - thus
 609          * we are rounding upwards:
 610          */
 611         end_pfn = e820_end_of_ram();
 612
 613         check_efer();
 614
 615         init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
 616
 617         zap_low_mappings(0);
 618
 619 #ifdef CONFIG_ACPI
 620         /*
 621          * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
 622          * Call this early for SRAT node setup.
 623          */
 624         acpi_boot_table_init();
 625 #endif
 626
 627 #ifdef CONFIG_ACPI_NUMA
 628         /*
 629          * Parse SRAT to discover nodes.
 630          */
 631         acpi_numa_init();
 632 #endif
 633
 634 #ifdef CONFIG_NUMA
 635         numa_initmem_init(0, end_pfn);
 636 #else
 637         contig_initmem_init(0, end_pfn);
 638 #endif
 639
 640         /* Reserve direct mapping */
 641         reserve_bootmem_generic(table_start << PAGE_SHIFT,
 642                                 (table_end - table_start) << PAGE_SHIFT);
 643
 644         /* reserve kernel */
 645         kernel_end = round_up(__pa_symbol(&_end),PAGE_SIZE);
 646         reserve_bootmem_generic(HIGH_MEMORY, kernel_end - HIGH_MEMORY);
 647
 648         /*
 649          * reserve physical page 0 - it's a special BIOS page on many boxes,
 650          * enabling clean reboots, SMP operation, laptop functions.
 651          */
 652         reserve_bootmem_generic(0, PAGE_SIZE);
 653
 654         /* reserve ebda region */
 655         reserve_ebda_region();
 656
 657 #ifdef CONFIG_SMP
 658         /*
 659          * But first pinch a few for the stack/trampoline stuff
 660          * FIXME: Don't need the extra page at 4K, but need to fix
 661          * trampoline before removing it. (see the GDT stuff)
 662          */
 663         reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);
 664
 665         /* Reserve SMP trampoline */
 666         reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
 667 #endif
 668
 669 #ifdef CONFIG_ACPI_SLEEP
 670        /*
 671         * Reserve low memory region for sleep support.
 672         */
 673        acpi_reserve_bootmem();
 674 #endif
 675 #ifdef CONFIG_X86_LOCAL_APIC
 676         /*
 677          * Find and reserve possible boot-time SMP configuration:
 678          */
 679         find_smp_config();
 680 #endif
 681 #ifdef CONFIG_BLK_DEV_INITRD
 682         if (LOADER_TYPE && INITRD_START) {
 683                 if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
 684                         reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
 685                         initrd_start =
 686                                 INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
 687                         initrd_end = initrd_start+INITRD_SIZE;
 688                 }
 689                 else {
 690                         printk(KERN_ERR "initrd extends beyond end of memory "
 691                             "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
 692                             (unsigned long)(INITRD_START + INITRD_SIZE),
 693                             (unsigned long)(end_pfn << PAGE_SHIFT));
 694                         initrd_start = 0;
 695                 }
 696         }
 697 #endif
 698 #ifdef CONFIG_KEXEC
 699         if (crashk_res.start != crashk_res.end) {
 700                 reserve_bootmem(crashk_res.start,
 701                         crashk_res.end - crashk_res.start + 1);
 702         }
 703 #endif
 704
 705         paging_init();
 706
 707         check_ioapic();
 708
 709 #ifdef CONFIG_ACPI
 710         /*
 711          * Read APIC and some other early information from ACPI tables.
 712          */
 713         acpi_boot_init();
 714 #endif
 715
 716 #ifdef CONFIG_X86_LOCAL_APIC
 717         /*
 718          * get boot-time SMP configuration:
 719          */
 720         if (smp_found_config)
 721                 get_smp_config();
 722         init_apic_mappings();
 723 #endif
 724
 725         /*
 726          * Request address space for all standard RAM and ROM resources
 727          * and also for regions reported as reserved by the e820.
 728          */
 729         probe_roms();
 730         e820_reserve_resources();
 731
 732         request_resource(&iomem_resource, &video_ram_resource);
 733
 734         {
 735         unsigned i;
 736         /* request I/O space for devices used on all i[345]86 PCs */
 737         for (i = 0; i < STANDARD_IO_RESOURCES; i++)
 738                 request_resource(&ioport_resource, &standard_io_resources[i]);
 739         }
 740
 741         e820_setup_gap();
 742
 743 #ifdef CONFIG_GART_IOMMU
 744        iommu_hole_init();
 745 #endif
 746
 747 #ifdef CONFIG_VT
 748 #if defined(CONFIG_VGA_CONSOLE)
 749         conswitchp = &vga_con;
 750 #elif defined(CONFIG_DUMMY_CONSOLE)
 751         conswitchp = &dummy_con;
 752 #endif
 753 #endif
 754 }
 755
 756 static int __cpuinit get_model_name(struct cpuinfo_x86 *c)
 757 {
 758         unsigned int *v;
 759
 760         if (c->extended_cpuid_level < 0x80000004)
 761                 return 0;
 762
 763         v = (unsigned int *) c->x86_model_id;
 764         cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
 765         cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
 766         cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
 767         c->x86_model_id[48] = 0;
 768         return 1;
 769 }
 770
 771
 772 static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
 773 {
 774         unsigned int n, dummy, eax, ebx, ecx, edx;
 775
 776         n = c->extended_cpuid_level;
 777
 778         if (n >= 0x80000005) {
 779                 cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
 780                 printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
 781                         edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
 782                 c->x86_cache_size=(ecx>>24)+(edx>>24);
 783                 /* On K8 L1 TLB is inclusive, so don't count it */
 784                 c->x86_tlbsize = 0;
 785         }
 786
 787         if (n >= 0x80000006) {
 788                 cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
 789                 ecx = cpuid_ecx(0x80000006);
 790                 c->x86_cache_size = ecx >> 16;
 791                 c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
 792
 793                 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
 794                 c->x86_cache_size, ecx & 0xFF);
 795         }
 796
 797         if (n >= 0x80000007)
 798                 cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power);
 799         if (n >= 0x80000008) {
 800                 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
 801                 c->x86_virt_bits = (eax >> 8) & 0xff;
 802                 c->x86_phys_bits = eax & 0xff;
 803         }
 804 }
 805
 806 #ifdef CONFIG_NUMA
 807 static int nearby_node(int apicid)
 808 {
 809         int i;
 810         for (i = apicid - 1; i >= 0; i--) {
 811                 int node = apicid_to_node[i];
 812                 if (node != NUMA_NO_NODE && node_online(node))
 813                         return node;
 814         }
 815         for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) {
 816                 int node = apicid_to_node[i];
 817                 if (node != NUMA_NO_NODE && node_online(node))
 818                         return node;
 819         }
 820         return first_node(node_online_map); /* Shouldn't happen */
 821 }
 822 #endif
 823
 824 /*
 825  * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
 826  * Assumes number of cores is a power of two.
 827  */
 828 static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
 829 {
 830 #ifdef CONFIG_SMP
 831         int cpu = smp_processor_id();
 832         unsigned bits;
 833 #ifdef CONFIG_NUMA
 834         int node = 0;
 835         unsigned apicid = phys_proc_id[cpu];
 836 #endif
 837
 838         bits = 0;
 839         while ((1 << bits) < c->x86_max_cores)
 840                 bits++;
 841
 842         /* Low order bits define the core id (index of core in socket) */
 843         cpu_core_id[cpu] = phys_proc_id[cpu] & ((1 << bits)-1);
 844         /* Convert the APIC ID into the socket ID */
 845         phys_proc_id[cpu] >>= bits;
 846
 847 #ifdef CONFIG_NUMA
 848         node = phys_proc_id[cpu];
 849         if (apicid_to_node[apicid] != NUMA_NO_NODE)
 850                 node = apicid_to_node[apicid];
 851         if (!node_online(node)) {
 852                 /* Two possibilities here:
 853                    - The CPU is missing memory and no node was created.
 854                    In that case try picking one from a nearby CPU
 855                    - The APIC IDs differ from the HyperTransport node IDs
 856                    which the K8 northbridge parsing fills in.
 857                    Assume they are all increased by a constant offset,
 858                    but in the same order as the HT nodeids.
 859                    If that doesn't result in a usable node fall back to the
 860                    path for the previous case.  */
 861                 int ht_nodeid = apicid - (phys_proc_id[0] << bits);
 862                 if (ht_nodeid >= 0 &&
 863                     apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
 864                         node = apicid_to_node[ht_nodeid];
 865                 /* Pick a nearby node */
 866                 if (!node_online(node))
 867                         node = nearby_node(apicid);
 868         }
 869         numa_set_node(cpu, node);
 870
 871         printk(KERN_INFO "CPU %d(%d) -> Node %d -> Core %d\n",
 872                         cpu, c->x86_max_cores, node, cpu_core_id[cpu]);
 873 #endif
 874 #endif
 875 }
 876
 877 static int __init init_amd(struct cpuinfo_x86 *c)
 878 {
 879         int r;
 880         int level;
 881
 882 #ifdef CONFIG_SMP
 883         unsigned long value;
 884
 885         /*
 886          * Disable TLB flush filter by setting HWCR.FFDIS on K8
 887          * bit 6 of msr C001_0015
 888          *
 889          * Errata 63 for SH-B3 steppings
 890          * Errata 122 for all steppings (F+ have it disabled by default)
 891          */
 892         if (c->x86 == 15) {
 893                 rdmsrl(MSR_K8_HWCR, value);
 894                 value |= 1 << 6;
 895                 wrmsrl(MSR_K8_HWCR, value);
 896         }
 897 #endif
 898
 899         /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
 900            3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
 901         clear_bit(0*32+31, &c->x86_capability);
 902
 903         /* C-stepping K8? */
 904         level = cpuid_eax(1);
 905         if ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58)
 906                 set_bit(X86_FEATURE_K8_C, &c->x86_capability);
 907
 908         r = get_model_name(c);
 909         if (!r) {
 910                 switch (c->x86) {
 911                 case 15:
 912                         /* Should distinguish Models here, but this is only
 913                            a fallback anyways. */
 914                         strcpy(c->x86_model_id, "Hammer");
 915                         break;
 916                 }
 917         }
 918         display_cacheinfo(c);
 919
 920         /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
 921         if (c->x86_power & (1<<8))
 922                 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
 923
 924         if (c->extended_cpuid_level >= 0x80000008) {
 925                 c->x86_max_cores = (cpuid_ecx(0x80000008) & 0xff) + 1;
 926                 if (c->x86_max_cores & (c->x86_max_cores - 1))
 927                         c->x86_max_cores = 1;
 928
 929                 amd_detect_cmp(c);
 930         }
 931
 932         return r;
 933 }
 934
 935 static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
 936 {
 937 #ifdef CONFIG_SMP
 938         u32     eax, ebx, ecx, edx;
 939         int     index_msb, core_bits;
 940         int     cpu = smp_processor_id();
 941
 942         cpuid(1, &eax, &ebx, &ecx, &edx);
 943
 944         c->apicid = phys_pkg_id(0);
 945
 946         if (!cpu_has(c, X86_FEATURE_HT) || cpu_has(c, X86_FEATURE_CMP_LEGACY))
 947                 return;
 948
 949         smp_num_siblings = (ebx & 0xff0000) >> 16;
 950
 951         if (smp_num_siblings == 1) {
 952                 printk(KERN_INFO  "CPU: Hyper-Threading is disabled\n");
 953         } else if (smp_num_siblings > 1 ) {
 954
 955                 if (smp_num_siblings > NR_CPUS) {
 956                         printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
 957                         smp_num_siblings = 1;
 958                         return;
 959                 }
 960
 961                 index_msb = get_count_order(smp_num_siblings);
 962                 phys_proc_id[cpu] = phys_pkg_id(index_msb);
 963
 964                 printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",
 965                        phys_proc_id[cpu]);
 966
 967                 smp_num_siblings = smp_num_siblings / c->x86_max_cores;
 968
 969                 index_msb = get_count_order(smp_num_siblings) ;
 970
 971                 core_bits = get_count_order(c->x86_max_cores);
 972
 973                 cpu_core_id[cpu] = phys_pkg_id(index_msb) &
 974                                                ((1 << core_bits) - 1);
 975
 976                 if (c->x86_max_cores > 1)
 977                         printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
 978                                cpu_core_id[cpu]);
 979         }
 980 #endif
 981 }
 982
 983 /*
 984  * find out the number of processor cores on the die
 985  */
 986 static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
 987 {
 988         unsigned int eax;
 989
 990         if (c->cpuid_level < 4)
 991                 return 1;
 992
 993         __asm__("cpuid"
 994                 : "=a" (eax)
 995                 : "0" (4), "c" (0)
 996                 : "bx", "dx");
 997
 998         if (eax & 0x1f)
 999                 return ((eax >> 26) + 1);
1000         else
1001                 return 1;
1002 }
1003
1004 static void srat_detect_node(void)
1005 {
1006 #ifdef CONFIG_NUMA
1007         unsigned node;
1008         int cpu = smp_processor_id();
1009
1010         /* Don't do the funky fallback heuristics the AMD version employs
1011            for now. */
1012         node = apicid_to_node[hard_smp_processor_id()];
1013         if (node == NUMA_NO_NODE)
1014                 node = 0;
1015         numa_set_node(cpu, node);
1016
1017         if (acpi_numa > 0)
1018                 printk(KERN_INFO "CPU %d -> Node %d\n", cpu, node);
1019 #endif
1020 }
1021
1022 static void __cpuinit init_intel(struct cpuinfo_x86 *c)
1023 {
1024         /* Cache sizes */
1025         unsigned n;
1026
1027         init_intel_cacheinfo(c);
1028         n = c->extended_cpuid_level;
1029         if (n >= 0x80000008) {
1030                 unsigned eax = cpuid_eax(0x80000008);
1031                 c->x86_virt_bits = (eax >> 8) & 0xff;
1032                 c->x86_phys_bits = eax & 0xff;
1033                 /* CPUID workaround for Intel 0F34 CPU */
1034                 if (c->x86_vendor == X86_VENDOR_INTEL &&
1035                     c->x86 == 0xF && c->x86_model == 0x3 &&
1036                     c->x86_mask == 0x4)
1037                         c->x86_phys_bits = 36;
1038         }
1039
1040         if (c->x86 == 15)
1041                 c->x86_cache_alignment = c->x86_clflush_size * 2;
1042         if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
1043             (c->x86 == 0x6 && c->x86_model >= 0x0e))
1044                 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
1045         c->x86_max_cores = intel_num_cpu_cores(c);
1046
1047         srat_detect_node();
1048 }
1049
1050 static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
1051 {
1052         char *v = c->x86_vendor_id;
1053
1054         if (!strcmp(v, "AuthenticAMD"))
1055                 c->x86_vendor = X86_VENDOR_AMD;
1056         else if (!strcmp(v, "GenuineIntel"))
1057                 c->x86_vendor = X86_VENDOR_INTEL;
1058         else
1059                 c->x86_vendor = X86_VENDOR_UNKNOWN;
1060 }
1061
1062 struct cpu_model_info {
1063         int vendor;
1064         int family;
1065         char *model_names[16];
1066 };
1067
1068 /* Do some early cpuid on the boot CPU to get some parameter that are
1069    needed before check_bugs. Everything advanced is in identify_cpu
1070    below. */
1071 void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
1072 {
1073         u32 tfms;
1074
1075         c->loops_per_jiffy = loops_per_jiffy;
1076         c->x86_cache_size = -1;
1077         c->x86_vendor = X86_VENDOR_UNKNOWN;
1078         c->x86_model = c->x86_mask = 0; /* So far unknown... */
1079         c->x86_vendor_id[0] = '\0'; /* Unset */
1080         c->x86_model_id[0] = '\0';  /* Unset */
1081         c->x86_clflush_size = 64;
1082         c->x86_cache_alignment = c->x86_clflush_size;
1083         c->x86_max_cores = 1;
1084         c->extended_cpuid_level = 0;
1085         memset(&c->x86_capability, 0, sizeof c->x86_capability);
1086
1087         /* Get vendor name */
1088         cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
1089               (unsigned int *)&c->x86_vendor_id[0],
1090               (unsigned int *)&c->x86_vendor_id[8],
1091               (unsigned int *)&c->x86_vendor_id[4]);
1092
1093         get_cpu_vendor(c);
1094
1095         /* Initialize the standard set of capabilities */
1096         /* Note that the vendor-specific code below might override */
1097
1098         /* Intel-defined flags: level 0x00000001 */
1099         if (c->cpuid_level >= 0x00000001) {
1100                 __u32 misc;
1101                 cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
1102                       &c->x86_capability[0]);
1103                 c->x86 = (tfms >> 8) & 0xf;
1104                 c->x86_model = (tfms >> 4) & 0xf;
1105                 c->x86_mask = tfms & 0xf;
1106                 if (c->x86 == 0xf)
1107                         c->x86 += (tfms >> 20) & 0xff;
1108                 if (c->x86 >= 0x6)
1109                         c->x86_model += ((tfms >> 16) & 0xF) << 4;
1110                 if (c->x86_capability[0] & (1<<19))
1111                         c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
1112         } else {
1113                 /* Have CPUID level 0 only - unheard of */
1114                 c->x86 = 4;
1115         }
1116
1117 #ifdef CONFIG_SMP
1118         phys_proc_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff;
1119 #endif
1120 }
1121
1122 /*
1123  * This does the hard work of actually picking apart the CPU stuff...
1124  */
1125 void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
1126 {
1127         int i;
1128         u32 xlvl;
1129
1130         early_identify_cpu(c);
1131
1132         /* AMD-defined flags: level 0x80000001 */
1133         xlvl = cpuid_eax(0x80000000);
1134         c->extended_cpuid_level = xlvl;
1135         if ((xlvl & 0xffff0000) == 0x80000000) {
1136                 if (xlvl >= 0x80000001) {
1137                         c->x86_capability[1] = cpuid_edx(0x80000001);
1138                         c->x86_capability[6] = cpuid_ecx(0x80000001);
1139                 }
1140                 if (xlvl >= 0x80000004)
1141                         get_model_name(c); /* Default name */
1142         }
1143
1144         /* Transmeta-defined flags: level 0x80860001 */
1145         xlvl = cpuid_eax(0x80860000);
1146         if ((xlvl & 0xffff0000) == 0x80860000) {
1147                 /* Don't set x86_cpuid_level here for now to not confuse. */
1148                 if (xlvl >= 0x80860001)
1149                         c->x86_capability[2] = cpuid_edx(0x80860001);
1150         }
1151
1152         /*
1153          * Vendor-specific initialization.  In this section we
1154          * canonicalize the feature flags, meaning if there are
1155          * features a certain CPU supports which CPUID doesn't
1156          * tell us, CPUID claiming incorrect flags, or other bugs,
1157          * we handle them here.
1158          *
1159          * At the end of this section, c->x86_capability better
1160          * indicate the features this CPU genuinely supports!
1161          */
1162         switch (c->x86_vendor) {
1163         case X86_VENDOR_AMD:
1164                 init_amd(c);
1165                 break;
1166
1167         case X86_VENDOR_INTEL:
1168                 init_intel(c);
1169                 break;
1170
1171         case X86_VENDOR_UNKNOWN:
1172         default:
1173                 display_cacheinfo(c);
1174                 break;
1175         }
1176
1177         select_idle_routine(c);
1178         detect_ht(c);
1179
1180         /*
1181          * On SMP, boot_cpu_data holds the common feature set between
1182          * all CPUs; so make sure that we indicate which features are
1183          * common between the CPUs.  The first time this routine gets
1184          * executed, c == &boot_cpu_data.
1185          */
1186         if (c != &boot_cpu_data) {
1187                 /* AND the already accumulated flags with these */
1188                 for (i = 0 ; i < NCAPINTS ; i++)
1189                         boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
1190         }
1191
1192 #ifdef CONFIG_X86_MCE
1193         mcheck_init(c);
1194 #endif
1195         if (c == &boot_cpu_data)
1196                 mtrr_bp_init();
1197         else
1198                 mtrr_ap_init();
1199 #ifdef CONFIG_NUMA
1200         numa_add_cpu(smp_processor_id());
1201 #endif
1202 }
1203
1204
1205 void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
1206 {
1207         if (c->x86_model_id[0])
1208                 printk("%s", c->x86_model_id);
1209
1210         if (c->x86_mask || c->cpuid_level >= 0)
1211                 printk(" stepping %02x\n", c->x86_mask);
1212         else
1213                 printk("\n");
1214 }
1215
1216 /*
1217  *      Get CPU information for use by the procfs.
1218  */
1219
1220 static int show_cpuinfo(struct seq_file *m, void *v)
1221 {
1222         struct cpuinfo_x86 *c = v;
1223
1224         /*
1225          * These flag bits must match the definitions in <asm/cpufeature.h>.
1226          * NULL means this bit is undefined or reserved; either way it doesn't
1227          * have meaning as far as Linux is concerned.  Note that it's important
1228          * to realize there is a difference between this table and CPUID -- if
1229          * applications want to get the raw CPUID data, they should access
1230          * /dev/cpu/<cpu_nr>/cpuid instead.
1231          */
1232         static char *x86_cap_flags[] = {
1233                 /* Intel-defined */
1234                 "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
1235                 "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
1236                 "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
1237                 "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL,
1238
1239                 /* AMD-defined */
1240                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1241                 NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
1242                 NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
1243                 NULL, "fxsr_opt", "rdtscp", NULL, NULL, "lm", "3dnowext", "3dnow",
1244
1245                 /* Transmeta-defined */
1246                 "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
1247                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1248                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1249                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1250
1251                 /* Other (Linux-defined) */
1252                 "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
1253                 "constant_tsc", NULL, NULL,
1254                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1255                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1256                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1257
1258                 /* Intel-defined (#2) */
1259                 "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", NULL, "est",
1260                 "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
1261                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1262                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1263
1264                 /* VIA/Cyrix/Centaur-defined */
1265                 NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
1266                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1267                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1268                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1269
1270                 /* AMD-defined (#2) */
1271                 "lahf_lm", "cmp_legacy", "svm", NULL, "cr8_legacy", NULL, NULL, NULL,
1272                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1273                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1274                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1275         };
1276         static char *x86_power_flags[] = {
1277                 "ts",   /* temperature sensor */
1278                 "fid",  /* frequency id control */
1279                 "vid",  /* voltage id control */
1280                 "ttp",  /* thermal trip */
1281                 "tm",
1282                 "stc",
1283                 NULL,
1284                 /* nothing */   /* constant_tsc - moved to flags */
1285         };
1286
1287
1288 #ifdef CONFIG_SMP
1289         if (!cpu_online(c-cpu_data))
1290                 return 0;
1291 #endif
1292
1293         seq_printf(m,"processor\t: %u\n"
1294                      "vendor_id\t: %s\n"
1295                      "cpu family\t: %d\n"
1296                      "model\t\t: %d\n"
1297                      "model name\t: %s\n",
1298                      (unsigned)(c-cpu_data),
1299                      c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
1300                      c->x86,
1301                      (int)c->x86_model,
1302                      c->x86_model_id[0] ? c->x86_model_id : "unknown");
1303
1304         if (c->x86_mask || c->cpuid_level >= 0)
1305                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
1306         else
1307                 seq_printf(m, "stepping\t: unknown\n");
1308
1309         if (cpu_has(c,X86_FEATURE_TSC)) {
1310                 unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data));
1311                 if (!freq)
1312                         freq = cpu_khz;
1313                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
1314                              freq / 1000, (freq % 1000));
1315         }
1316
1317         /* Cache size */
1318         if (c->x86_cache_size >= 0)
1319                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
1320
1321 #ifdef CONFIG_SMP
1322         if (smp_num_siblings * c->x86_max_cores > 1) {
1323                 int cpu = c - cpu_data;
1324                 seq_printf(m, "physical id\t: %d\n", phys_proc_id[cpu]);
1325                 seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[cpu]));
1326                 seq_printf(m, "core id\t\t: %d\n", cpu_core_id[cpu]);
1327                 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
1328         }
1329 #endif
1330
1331         seq_printf(m,
1332                 "fpu\t\t: yes\n"
1333                 "fpu_exception\t: yes\n"
1334                 "cpuid level\t: %d\n"
1335                 "wp\t\t: yes\n"
1336                 "flags\t\t:",
1337                    c->cpuid_level);
1338
1339         {
1340                 int i;
1341                 for ( i = 0 ; i < 32*NCAPINTS ; i++ )
1342                         if ( test_bit(i, &c->x86_capability) &&
1343                              x86_cap_flags[i] != NULL )
1344                                 seq_printf(m, " %s", x86_cap_flags[i]);
1345         }
1346
1347         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
1348                    c->loops_per_jiffy/(500000/HZ),
1349                    (c->loops_per_jiffy/(5000/HZ)) % 100);
1350
1351         if (c->x86_tlbsize > 0)
1352                 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
1353         seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
1354         seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
1355
1356         seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
1357                    c->x86_phys_bits, c->x86_virt_bits);
1358
1359         seq_printf(m, "power management:");
1360         {
1361                 unsigned i;
1362                 for (i = 0; i < 32; i++)
1363                         if (c->x86_power & (1 << i)) {
1364                                 if (i < ARRAY_SIZE(x86_power_flags) &&
1365                                         x86_power_flags[i])
1366                                         seq_printf(m, "%s%s",
1367                                                 x86_power_flags[i][0]?" ":"",
1368                                                 x86_power_flags[i]);
1369                                 else
1370                                         seq_printf(m, " [%d]", i);
1371                         }
1372         }
1373
1374         seq_printf(m, "\n\n");
1375
1376         return 0;
1377 }
1378
1379 static void *c_start(struct seq_file *m, loff_t *pos)
1380 {
1381         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
1382 }
1383
1384 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1385 {
1386         ++*pos;
1387         return c_start(m, pos);
1388 }
1389
1390 static void c_stop(struct seq_file *m, void *v)
1391 {
1392 }
1393
1394 struct seq_operations cpuinfo_op = {
1395         .start =c_start,
1396         .next = c_next,
1397         .stop = c_stop,
1398         .show = show_cpuinfo,
1399 };
1400
1401 static int __init run_dmi_scan(void)
1402 {
1403         dmi_scan_machine();
1404         return 0;
1405 }
1406 core_initcall(run_dmi_scan);
1407