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
  10 /*
  11  * This file handles the architecture-dependent parts of initialization
  12  */
  13
  14 #include <linux/errno.h>
  15 #include <linux/sched.h>
  16 #include <linux/kernel.h>
  17 #include <linux/mm.h>
  18 #include <linux/stddef.h>
  19 #include <linux/unistd.h>
  20 #include <linux/ptrace.h>
  21 #include <linux/slab.h>
  22 #include <linux/user.h>
  23 #include <linux/a.out.h>
  24 #include <linux/screen_info.h>
  25 #include <linux/ioport.h>
  26 #include <linux/delay.h>
  27 #include <linux/init.h>
  28 #include <linux/initrd.h>
  29 #include <linux/highmem.h>
  30 #include <linux/bootmem.h>
  31 #include <linux/module.h>
  32 #include <asm/processor.h>
  33 #include <linux/console.h>
  34 #include <linux/seq_file.h>
  35 #include <linux/crash_dump.h>
  36 #include <linux/root_dev.h>
  37 #include <linux/pci.h>
  38 #include <linux/acpi.h>
  39 #include <linux/kallsyms.h>
  40 #include <linux/edd.h>
  41 #include <linux/mmzone.h>
  42 #include <linux/kexec.h>
  43 #include <linux/cpufreq.h>
  44 #include <linux/dmi.h>
  45 #include <linux/dma-mapping.h>
  46 #include <linux/ctype.h>
  47
  48 #include <asm/mtrr.h>
  49 #include <asm/uaccess.h>
  50 #include <asm/system.h>
  51 #include <asm/io.h>
  52 #include <asm/smp.h>
  53 #include <asm/msr.h>
  54 #include <asm/desc.h>
  55 #include <video/edid.h>
  56 #include <asm/e820.h>
  57 #include <asm/dma.h>
  58 #include <asm/mpspec.h>
  59 #include <asm/mmu_context.h>
  60 #include <asm/bootsetup.h>
  61 #include <asm/proto.h>
  62 #include <asm/setup.h>
  63 #include <asm/mach_apic.h>
  64 #include <asm/numa.h>
  65 #include <asm/sections.h>
  66 #include <asm/dmi.h>
  67
  68 /*
  69  * Machine setup..
  70  */
  71
  72 struct cpuinfo_x86 boot_cpu_data __read_mostly;
  73 EXPORT_SYMBOL(boot_cpu_data);
  74
  75 unsigned long mmu_cr4_features;
  76
  77 int acpi_disabled;
  78 EXPORT_SYMBOL(acpi_disabled);
  79 #ifdef  CONFIG_ACPI
  80 extern int __initdata acpi_ht;
  81 extern acpi_interrupt_flags     acpi_sci_flags;
  82 int __initdata acpi_force = 0;
  83 #endif
  84
  85 int acpi_numa __initdata;
  86
  87 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
  88 int bootloader_type;
  89
  90 unsigned long saved_video_mode;
  91
  92 /*
  93  * Early DMI memory
  94  */
  95 int dmi_alloc_index;
  96 char dmi_alloc_data[DMI_MAX_DATA];
  97
  98 /*
  99  * Setup options
 100  */
 101 struct screen_info screen_info;
 102 EXPORT_SYMBOL(screen_info);
 103 struct sys_desc_table_struct {
 104         unsigned short length;
 105         unsigned char table[0];
 106 };
 107
 108 struct edid_info edid_info;
 109 EXPORT_SYMBOL_GPL(edid_info);
 110 struct e820map e820;
 111
 112 extern int root_mountflags;
 113
 114 char command_line[COMMAND_LINE_SIZE];
 115
 116 struct resource standard_io_resources[] = {
 117         { .name = "dma1", .start = 0x00, .end = 0x1f,
 118                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 119         { .name = "pic1", .start = 0x20, .end = 0x21,
 120                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 121         { .name = "timer0", .start = 0x40, .end = 0x43,
 122                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 123         { .name = "timer1", .start = 0x50, .end = 0x53,
 124                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 125         { .name = "keyboard", .start = 0x60, .end = 0x6f,
 126                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 127         { .name = "dma page reg", .start = 0x80, .end = 0x8f,
 128                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 129         { .name = "pic2", .start = 0xa0, .end = 0xa1,
 130                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 131         { .name = "dma2", .start = 0xc0, .end = 0xdf,
 132                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 133         { .name = "fpu", .start = 0xf0, .end = 0xff,
 134                 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
 135 };
 136
 137 #define STANDARD_IO_RESOURCES \
 138         (sizeof standard_io_resources / sizeof standard_io_resources[0])
 139
 140 #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
 141
 142 struct resource data_resource = {
 143         .name = "Kernel data",
 144         .start = 0,
 145         .end = 0,
 146         .flags = IORESOURCE_RAM,
 147 };
 148 struct resource code_resource = {
 149         .name = "Kernel code",
 150         .start = 0,
 151         .end = 0,
 152         .flags = IORESOURCE_RAM,
 153 };
 154
 155 #define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)
 156
 157 static struct resource system_rom_resource = {
 158         .name = "System ROM",
 159         .start = 0xf0000,
 160         .end = 0xfffff,
 161         .flags = IORESOURCE_ROM,
 162 };
 163
 164 static struct resource extension_rom_resource = {
 165         .name = "Extension ROM",
 166         .start = 0xe0000,
 167         .end = 0xeffff,
 168         .flags = IORESOURCE_ROM,
 169 };
 170
 171 static struct resource adapter_rom_resources[] = {
 172         { .name = "Adapter ROM", .start = 0xc8000, .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         { .name = "Adapter ROM", .start = 0, .end = 0,
 179                 .flags = IORESOURCE_ROM },
 180         { .name = "Adapter ROM", .start = 0, .end = 0,
 181                 .flags = IORESOURCE_ROM },
 182         { .name = "Adapter ROM", .start = 0, .end = 0,
 183                 .flags = IORESOURCE_ROM }
 184 };
 185
 186 #define ADAPTER_ROM_RESOURCES \
 187         (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
 188
 189 static struct resource video_rom_resource = {
 190         .name = "Video ROM",
 191         .start = 0xc0000,
 192         .end = 0xc7fff,
 193         .flags = IORESOURCE_ROM,
 194 };
 195
 196 static struct resource video_ram_resource = {
 197         .name = "Video RAM area",
 198         .start = 0xa0000,
 199         .end = 0xbffff,
 200         .flags = IORESOURCE_RAM,
 201 };
 202
 203 #define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
 204
 205 static int __init romchecksum(unsigned char *rom, unsigned long length)
 206 {
 207         unsigned char *p, sum = 0;
 208
 209         for (p = rom; p < rom + length; p++)
 210                 sum += *p;
 211         return sum == 0;
 212 }
 213
 214 static void __init probe_roms(void)
 215 {
 216         unsigned long start, length, upper;
 217         unsigned char *rom;
 218         int           i;
 219
 220         /* video rom */
 221         upper = adapter_rom_resources[0].start;
 222         for (start = video_rom_resource.start; start < upper; start += 2048) {
 223                 rom = isa_bus_to_virt(start);
 224                 if (!romsignature(rom))
 225                         continue;
 226
 227                 video_rom_resource.start = start;
 228
 229                 /* 0 < length <= 0x7f * 512, historically */
 230                 length = rom[2] * 512;
 231
 232                 /* if checksum okay, trust length byte */
 233                 if (length && romchecksum(rom, length))
 234                         video_rom_resource.end = start + length - 1;
 235
 236                 request_resource(&iomem_resource, &video_rom_resource);
 237                 break;
 238                         }
 239
 240         start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
 241         if (start < upper)
 242                 start = upper;
 243
 244         /* system rom */
 245         request_resource(&iomem_resource, &system_rom_resource);
 246         upper = system_rom_resource.start;
 247
 248         /* check for extension rom (ignore length byte!) */
 249         rom = isa_bus_to_virt(extension_rom_resource.start);
 250         if (romsignature(rom)) {
 251                 length = extension_rom_resource.end - extension_rom_resource.start + 1;
 252                 if (romchecksum(rom, length)) {
 253                         request_resource(&iomem_resource, &extension_rom_resource);
 254                         upper = extension_rom_resource.start;
 255                 }
 256         }
 257
 258         /* check for adapter roms on 2k boundaries */
 259         for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
 260                 rom = isa_bus_to_virt(start);
 261                 if (!romsignature(rom))
 262                         continue;
 263
 264                 /* 0 < length <= 0x7f * 512, historically */
 265                 length = rom[2] * 512;
 266
 267                 /* but accept any length that fits if checksum okay */
 268                 if (!length || start + length > upper || !romchecksum(rom, length))
 269                         continue;
 270
 271                 adapter_rom_resources[i].start = start;
 272                 adapter_rom_resources[i].end = start + length - 1;
 273                 request_resource(&iomem_resource, &adapter_rom_resources[i]);
 274
 275                 start = adapter_rom_resources[i++].end & ~2047UL;
 276         }
 277 }
 278
 279 /* Check for full argument with no trailing characters */
 280 static int fullarg(char *p, char *arg)
 281 {
 282         int l = strlen(arg);
 283         return !memcmp(p, arg, l) && (p[l] == 0 || isspace(p[l]));
 284 }
 285
 286 static __init void parse_cmdline_early (char ** cmdline_p)
 287 {
 288         char c = ' ', *to = command_line, *from = COMMAND_LINE;
 289         int len = 0;
 290         int userdef = 0;
 291
 292         for (;;) {
 293                 if (c != ' ')
 294                         goto next_char;
 295
 296 #ifdef  CONFIG_SMP
 297                 /*
 298                  * If the BIOS enumerates physical processors before logical,
 299                  * maxcpus=N at enumeration-time can be used to disable HT.
 300                  */
 301                 else if (!memcmp(from, "maxcpus=", 8)) {
 302                         extern unsigned int maxcpus;
 303
 304                         maxcpus = simple_strtoul(from + 8, NULL, 0);
 305                 }
 306 #endif
 307 #ifdef CONFIG_ACPI
 308                 /* "acpi=off" disables both ACPI table parsing and interpreter init */
 309                 if (fullarg(from,"acpi=off"))
 310                         disable_acpi();
 311
 312                 if (fullarg(from, "acpi=force")) {
 313                         /* add later when we do DMI horrors: */
 314                         acpi_force = 1;
 315                         acpi_disabled = 0;
 316                 }
 317
 318                 /* acpi=ht just means: do ACPI MADT parsing
 319                    at bootup, but don't enable the full ACPI interpreter */
 320                 if (fullarg(from, "acpi=ht")) {
 321                         if (!acpi_force)
 322                                 disable_acpi();
 323                         acpi_ht = 1;
 324                 }
 325                 else if (fullarg(from, "pci=noacpi"))
 326                         acpi_disable_pci();
 327                 else if (fullarg(from, "acpi=noirq"))
 328                         acpi_noirq_set();
 329
 330                 else if (fullarg(from, "acpi_sci=edge"))
 331                         acpi_sci_flags.trigger =  1;
 332                 else if (fullarg(from, "acpi_sci=level"))
 333                         acpi_sci_flags.trigger = 3;
 334                 else if (fullarg(from, "acpi_sci=high"))
 335                         acpi_sci_flags.polarity = 1;
 336                 else if (fullarg(from, "acpi_sci=low"))
 337                         acpi_sci_flags.polarity = 3;
 338
 339                 /* acpi=strict disables out-of-spec workarounds */
 340                 else if (fullarg(from, "acpi=strict")) {
 341                         acpi_strict = 1;
 342                 }
 343                 else if (fullarg(from, "acpi_skip_timer_override"))
 344                         acpi_skip_timer_override = 1;
 345 #endif
 346
 347                 if (fullarg(from, "disable_timer_pin_1"))
 348                         disable_timer_pin_1 = 1;
 349                 if (fullarg(from, "enable_timer_pin_1"))
 350                         disable_timer_pin_1 = -1;
 351
 352                 if (fullarg(from, "nolapic") || fullarg(from, "disableapic")) {
 353                         clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
 354                         disable_apic = 1;
 355                 }
 356
 357                 if (fullarg(from, "noapic"))
 358                         skip_ioapic_setup = 1;
 359
 360                 if (fullarg(from,"apic")) {
 361                         skip_ioapic_setup = 0;
 362                         ioapic_force = 1;
 363                 }
 364
 365                 if (!memcmp(from, "mem=", 4))
 366                         parse_memopt(from+4, &from);
 367
 368                 if (!memcmp(from, "memmap=", 7)) {
 369                         /* exactmap option is for used defined memory */
 370                         if (!memcmp(from+7, "exactmap", 8)) {
 371 #ifdef CONFIG_CRASH_DUMP
 372                                 /* If we are doing a crash dump, we
 373                                  * still need to know the real mem
 374                                  * size before original memory map is
 375                                  * reset.
 376                                  */
 377                                 saved_max_pfn = e820_end_of_ram();
 378 #endif
 379                                 from += 8+7;
 380                                 end_pfn_map = 0;
 381                                 e820.nr_map = 0;
 382                                 userdef = 1;
 383                         }
 384                         else {
 385                                 parse_memmapopt(from+7, &from);
 386                                 userdef = 1;
 387                         }
 388                 }
 389
 390 #ifdef CONFIG_NUMA
 391                 if (!memcmp(from, "numa=", 5))
 392                         numa_setup(from+5);
 393 #endif
 394
 395                 if (!memcmp(from,"iommu=",6)) {
 396                         iommu_setup(from+6);
 397                 }
 398
 399                 if (fullarg(from,"oops=panic"))
 400                         panic_on_oops = 1;
 401
 402                 if (!memcmp(from, "noexec=", 7))
 403                         nonx_setup(from + 7);
 404
 405 #ifdef CONFIG_KEXEC
 406                 /* crashkernel=size@addr specifies the location to reserve for
 407                  * a crash kernel.  By reserving this memory we guarantee
 408                  * that linux never set's it up as a DMA target.
 409                  * Useful for holding code to do something appropriate
 410                  * after a kernel panic.
 411                  */
 412                 else if (!memcmp(from, "crashkernel=", 12)) {
 413                         unsigned long size, base;
 414                         size = memparse(from+12, &from);
 415                         if (*from == '@') {
 416                                 base = memparse(from+1, &from);
 417                                 /* FIXME: Do I want a sanity check
 418                                  * to validate the memory range?
 419                                  */
 420                                 crashk_res.start = base;
 421                                 crashk_res.end   = base + size - 1;
 422                         }
 423                 }
 424 #endif
 425
 426 #ifdef CONFIG_PROC_VMCORE
 427                 /* elfcorehdr= specifies the location of elf core header
 428                  * stored by the crashed kernel. This option will be passed
 429                  * by kexec loader to the capture kernel.
 430                  */
 431                 else if(!memcmp(from, "elfcorehdr=", 11))
 432                         elfcorehdr_addr = memparse(from+11, &from);
 433 #endif
 434
 435 #ifdef CONFIG_HOTPLUG_CPU
 436                 else if (!memcmp(from, "additional_cpus=", 16))
 437                         setup_additional_cpus(from+16);
 438 #endif
 439
 440         next_char:
 441                 c = *(from++);
 442                 if (!c)
 443                         break;
 444                 if (COMMAND_LINE_SIZE <= ++len)
 445                         break;
 446                 *(to++) = c;
 447         }
 448         if (userdef) {
 449                 printk(KERN_INFO "user-defined physical RAM map:\n");
 450                 e820_print_map("user");
 451         }
 452         *to = '\0';
 453         *cmdline_p = command_line;
 454 }
 455
 456 #ifndef CONFIG_NUMA
 457 static void __init
 458 contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
 459 {
 460         unsigned long bootmap_size, bootmap;
 461
 462         bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
 463         bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
 464         if (bootmap == -1L)
 465                 panic("Cannot find bootmem map of size %ld\n",bootmap_size);
 466         bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
 467         e820_bootmem_free(NODE_DATA(0), 0, end_pfn << PAGE_SHIFT);
 468         reserve_bootmem(bootmap, bootmap_size);
 469 }
 470 #endif
 471
 472 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
 473 struct edd edd;
 474 #ifdef CONFIG_EDD_MODULE
 475 EXPORT_SYMBOL(edd);
 476 #endif
 477 /**
 478  * copy_edd() - Copy the BIOS EDD information
 479  *              from boot_params into a safe place.
 480  *
 481  */
 482 static inline void copy_edd(void)
 483 {
 484      memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
 485      memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
 486      edd.mbr_signature_nr = EDD_MBR_SIG_NR;
 487      edd.edd_info_nr = EDD_NR;
 488 }
 489 #else
 490 static inline void copy_edd(void)
 491 {
 492 }
 493 #endif
 494
 495 #define EBDA_ADDR_POINTER 0x40E
 496
 497 unsigned __initdata ebda_addr;
 498 unsigned __initdata ebda_size;
 499
 500 static void discover_ebda(void)
 501 {
 502         /*
 503          * there is a real-mode segmented pointer pointing to the
 504          * 4K EBDA area at 0x40E
 505          */
 506         ebda_addr = *(unsigned short *)EBDA_ADDR_POINTER;
 507         ebda_addr <<= 4;
 508
 509         ebda_size = *(unsigned short *)(unsigned long)ebda_addr;
 510
 511         /* Round EBDA up to pages */
 512         if (ebda_size == 0)
 513                 ebda_size = 1;
 514         ebda_size <<= 10;
 515         ebda_size = round_up(ebda_size + (ebda_addr & ~PAGE_MASK), PAGE_SIZE);
 516         if (ebda_size > 64*1024)
 517                 ebda_size = 64*1024;
 518 }
 519
 520 void __init setup_arch(char **cmdline_p)
 521 {
 522         ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
 523         screen_info = SCREEN_INFO;
 524         edid_info = EDID_INFO;
 525         saved_video_mode = SAVED_VIDEO_MODE;
 526         bootloader_type = LOADER_TYPE;
 527
 528 #ifdef CONFIG_BLK_DEV_RAM
 529         rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
 530         rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
 531         rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
 532 #endif
 533         setup_memory_region();
 534         copy_edd();
 535
 536         if (!MOUNT_ROOT_RDONLY)
 537                 root_mountflags &= ~MS_RDONLY;
 538         init_mm.start_code = (unsigned long) &_text;
 539         init_mm.end_code = (unsigned long) &_etext;
 540         init_mm.end_data = (unsigned long) &_edata;
 541         init_mm.brk = (unsigned long) &_end;
 542
 543         code_resource.start = virt_to_phys(&_text);
 544         code_resource.end = virt_to_phys(&_etext)-1;
 545         data_resource.start = virt_to_phys(&_etext);
 546         data_resource.end = virt_to_phys(&_edata)-1;
 547
 548         parse_cmdline_early(cmdline_p);
 549
 550         early_identify_cpu(&boot_cpu_data);
 551
 552         /*
 553          * partially used pages are not usable - thus
 554          * we are rounding upwards:
 555          */
 556         end_pfn = e820_end_of_ram();
 557         num_physpages = end_pfn;                /* for pfn_valid */
 558
 559         check_efer();
 560
 561         discover_ebda();
 562
 563         init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
 564
 565         dmi_scan_machine();
 566
 567         zap_low_mappings(0);
 568
 569 #ifdef CONFIG_ACPI
 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         reserve_bootmem_generic(__pa_symbol(&_text),
 596                                 __pa_symbol(&_end) - __pa_symbol(&_text));
 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         if (ebda_addr)
 606                 reserve_bootmem_generic(ebda_addr, ebda_size);
 607
 608 #ifdef CONFIG_SMP
 609         /*
 610          * But first pinch a few for the stack/trampoline stuff
 611          * FIXME: Don't need the extra page at 4K, but need to fix
 612          * trampoline before removing it. (see the GDT stuff)
 613          */
 614         reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);
 615
 616         /* Reserve SMP trampoline */
 617         reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
 618 #endif
 619
 620 #ifdef CONFIG_ACPI_SLEEP
 621        /*
 622         * Reserve low memory region for sleep support.
 623         */
 624        acpi_reserve_bootmem();
 625 #endif
 626         /*
 627          * Find and reserve possible boot-time SMP configuration:
 628          */
 629         find_smp_config();
 630 #ifdef CONFIG_BLK_DEV_INITRD
 631         if (LOADER_TYPE && INITRD_START) {
 632                 if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
 633                         reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
 634                         initrd_start =
 635                                 INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
 636                         initrd_end = initrd_start+INITRD_SIZE;
 637                 }
 638                 else {
 639                         printk(KERN_ERR "initrd extends beyond end of memory "
 640                             "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
 641                             (unsigned long)(INITRD_START + INITRD_SIZE),
 642                             (unsigned long)(end_pfn << PAGE_SHIFT));
 643                         initrd_start = 0;
 644                 }
 645         }
 646 #endif
 647 #ifdef CONFIG_KEXEC
 648         if (crashk_res.start != crashk_res.end) {
 649                 reserve_bootmem_generic(crashk_res.start,
 650                         crashk_res.end - crashk_res.start + 1);
 651         }
 652 #endif
 653
 654         paging_init();
 655
 656         check_ioapic();
 657
 658         /*
 659          * set this early, so we dont allocate cpu0
 660          * if MADT list doesnt list BSP first
 661          * mpparse.c/MP_processor_info() allocates logical cpu numbers.
 662          */
 663         cpu_set(0, cpu_present_map);
 664 #ifdef CONFIG_ACPI
 665         /*
 666          * Read APIC and some other early information from ACPI tables.
 667          */
 668         acpi_boot_init();
 669 #endif
 670
 671         init_cpu_to_node();
 672
 673         /*
 674          * get boot-time SMP configuration:
 675          */
 676         if (smp_found_config)
 677                 get_smp_config();
 678         init_apic_mappings();
 679
 680         /*
 681          * Request address space for all standard RAM and ROM resources
 682          * and also for regions reported as reserved by the e820.
 683          */
 684         probe_roms();
 685         e820_reserve_resources();
 686
 687         request_resource(&iomem_resource, &video_ram_resource);
 688
 689         {
 690         unsigned i;
 691         /* request I/O space for devices used on all i[345]86 PCs */
 692         for (i = 0; i < STANDARD_IO_RESOURCES; i++)
 693                 request_resource(&ioport_resource, &standard_io_resources[i]);
 694         }
 695
 696         e820_setup_gap();
 697
 698 #ifdef CONFIG_VT
 699 #if defined(CONFIG_VGA_CONSOLE)
 700         conswitchp = &vga_con;
 701 #elif defined(CONFIG_DUMMY_CONSOLE)
 702         conswitchp = &dummy_con;
 703 #endif
 704 #endif
 705 }
 706
 707 static int __cpuinit get_model_name(struct cpuinfo_x86 *c)
 708 {
 709         unsigned int *v;
 710
 711         if (c->extended_cpuid_level < 0x80000004)
 712                 return 0;
 713
 714         v = (unsigned int *) c->x86_model_id;
 715         cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
 716         cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
 717         cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
 718         c->x86_model_id[48] = 0;
 719         return 1;
 720 }
 721
 722
 723 static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
 724 {
 725         unsigned int n, dummy, eax, ebx, ecx, edx;
 726
 727         n = c->extended_cpuid_level;
 728
 729         if (n >= 0x80000005) {
 730                 cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
 731                 printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
 732                         edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
 733                 c->x86_cache_size=(ecx>>24)+(edx>>24);
 734                 /* On K8 L1 TLB is inclusive, so don't count it */
 735                 c->x86_tlbsize = 0;
 736         }
 737
 738         if (n >= 0x80000006) {
 739                 cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
 740                 ecx = cpuid_ecx(0x80000006);
 741                 c->x86_cache_size = ecx >> 16;
 742                 c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
 743
 744                 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
 745                 c->x86_cache_size, ecx & 0xFF);
 746         }
 747
 748         if (n >= 0x80000007)
 749                 cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power);
 750         if (n >= 0x80000008) {
 751                 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
 752                 c->x86_virt_bits = (eax >> 8) & 0xff;
 753                 c->x86_phys_bits = eax & 0xff;
 754         }
 755 }
 756
 757 #ifdef CONFIG_NUMA
 758 static int nearby_node(int apicid)
 759 {
 760         int i;
 761         for (i = apicid - 1; i >= 0; i--) {
 762                 int node = apicid_to_node[i];
 763                 if (node != NUMA_NO_NODE && node_online(node))
 764                         return node;
 765         }
 766         for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) {
 767                 int node = apicid_to_node[i];
 768                 if (node != NUMA_NO_NODE && node_online(node))
 769                         return node;
 770         }
 771         return first_node(node_online_map); /* Shouldn't happen */
 772 }
 773 #endif
 774
 775 /*
 776  * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
 777  * Assumes number of cores is a power of two.
 778  */
 779 static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
 780 {
 781 #ifdef CONFIG_SMP
 782         unsigned bits;
 783 #ifdef CONFIG_NUMA
 784         int cpu = smp_processor_id();
 785         int node = 0;
 786         unsigned apicid = hard_smp_processor_id();
 787 #endif
 788         unsigned ecx = cpuid_ecx(0x80000008);
 789
 790         c->x86_max_cores = (ecx & 0xff) + 1;
 791
 792         /* CPU telling us the core id bits shift? */
 793         bits = (ecx >> 12) & 0xF;
 794
 795         /* Otherwise recompute */
 796         if (bits == 0) {
 797                 while ((1 << bits) < c->x86_max_cores)
 798                         bits++;
 799         }
 800
 801         /* Low order bits define the core id (index of core in socket) */
 802         c->cpu_core_id = c->phys_proc_id & ((1 << bits)-1);
 803         /* Convert the APIC ID into the socket ID */
 804         c->phys_proc_id = phys_pkg_id(bits);
 805
 806 #ifdef CONFIG_NUMA
 807         node = c->phys_proc_id;
 808         if (apicid_to_node[apicid] != NUMA_NO_NODE)
 809                 node = apicid_to_node[apicid];
 810         if (!node_online(node)) {
 811                 /* Two possibilities here:
 812                    - The CPU is missing memory and no node was created.
 813                    In that case try picking one from a nearby CPU
 814                    - The APIC IDs differ from the HyperTransport node IDs
 815                    which the K8 northbridge parsing fills in.
 816                    Assume they are all increased by a constant offset,
 817                    but in the same order as the HT nodeids.
 818                    If that doesn't result in a usable node fall back to the
 819                    path for the previous case.  */
 820                 int ht_nodeid = apicid - (cpu_data[0].phys_proc_id << bits);
 821                 if (ht_nodeid >= 0 &&
 822                     apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
 823                         node = apicid_to_node[ht_nodeid];
 824                 /* Pick a nearby node */
 825                 if (!node_online(node))
 826                         node = nearby_node(apicid);
 827         }
 828         numa_set_node(cpu, node);
 829
 830         printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
 831 #endif
 832 #endif
 833 }
 834
 835 static void __init init_amd(struct cpuinfo_x86 *c)
 836 {
 837         unsigned level;
 838
 839 #ifdef CONFIG_SMP
 840         unsigned long value;
 841
 842         /*
 843          * Disable TLB flush filter by setting HWCR.FFDIS on K8
 844          * bit 6 of msr C001_0015
 845          *
 846          * Errata 63 for SH-B3 steppings
 847          * Errata 122 for all steppings (F+ have it disabled by default)
 848          */
 849         if (c->x86 == 15) {
 850                 rdmsrl(MSR_K8_HWCR, value);
 851                 value |= 1 << 6;
 852                 wrmsrl(MSR_K8_HWCR, value);
 853         }
 854 #endif
 855
 856         /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
 857            3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
 858         clear_bit(0*32+31, &c->x86_capability);
 859
 860         /* On C+ stepping K8 rep microcode works well for copy/memset */
 861         level = cpuid_eax(1);
 862         if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58))
 863                 set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
 864
 865         /* Enable workaround for FXSAVE leak */
 866         if (c->x86 >= 6)
 867                 set_bit(X86_FEATURE_FXSAVE_LEAK, &c->x86_capability);
 868
 869         level = get_model_name(c);
 870         if (!level) {
 871                 switch (c->x86) {
 872                 case 15:
 873                         /* Should distinguish Models here, but this is only
 874                            a fallback anyways. */
 875                         strcpy(c->x86_model_id, "Hammer");
 876                         break;
 877                 }
 878         }
 879         display_cacheinfo(c);
 880
 881         /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
 882         if (c->x86_power & (1<<8))
 883                 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
 884
 885         /* Multi core CPU? */
 886         if (c->extended_cpuid_level >= 0x80000008)
 887                 amd_detect_cmp(c);
 888
 889         /* Fix cpuid4 emulation for more */
 890         num_cache_leaves = 3;
 891 }
 892
 893 static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
 894 {
 895 #ifdef CONFIG_SMP
 896         u32     eax, ebx, ecx, edx;
 897         int     index_msb, core_bits;
 898
 899         cpuid(1, &eax, &ebx, &ecx, &edx);
 900
 901
 902         if (!cpu_has(c, X86_FEATURE_HT))
 903                 return;
 904         if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
 905                 goto out;
 906
 907         smp_num_siblings = (ebx & 0xff0000) >> 16;
 908
 909         if (smp_num_siblings == 1) {
 910                 printk(KERN_INFO  "CPU: Hyper-Threading is disabled\n");
 911         } else if (smp_num_siblings > 1 ) {
 912
 913                 if (smp_num_siblings > NR_CPUS) {
 914                         printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
 915                         smp_num_siblings = 1;
 916                         return;
 917                 }
 918
 919                 index_msb = get_count_order(smp_num_siblings);
 920                 c->phys_proc_id = phys_pkg_id(index_msb);
 921
 922                 smp_num_siblings = smp_num_siblings / c->x86_max_cores;
 923
 924                 index_msb = get_count_order(smp_num_siblings) ;
 925
 926                 core_bits = get_count_order(c->x86_max_cores);
 927
 928                 c->cpu_core_id = phys_pkg_id(index_msb) &
 929                                                ((1 << core_bits) - 1);
 930         }
 931 out:
 932         if ((c->x86_max_cores * smp_num_siblings) > 1) {
 933                 printk(KERN_INFO  "CPU: Physical Processor ID: %d\n", c->phys_proc_id);
 934                 printk(KERN_INFO  "CPU: Processor Core ID: %d\n", c->cpu_core_id);
 935         }
 936
 937 #endif
 938 }
 939
 940 /*
 941  * find out the number of processor cores on the die
 942  */
 943 static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
 944 {
 945         unsigned int eax, t;
 946
 947         if (c->cpuid_level < 4)
 948                 return 1;
 949
 950         cpuid_count(4, 0, &eax, &t, &t, &t);
 951
 952         if (eax & 0x1f)
 953                 return ((eax >> 26) + 1);
 954         else
 955                 return 1;
 956 }
 957
 958 static void srat_detect_node(void)
 959 {
 960 #ifdef CONFIG_NUMA
 961         unsigned node;
 962         int cpu = smp_processor_id();
 963         int apicid = hard_smp_processor_id();
 964
 965         /* Don't do the funky fallback heuristics the AMD version employs
 966            for now. */
 967         node = apicid_to_node[apicid];
 968         if (node == NUMA_NO_NODE)
 969                 node = first_node(node_online_map);
 970         numa_set_node(cpu, node);
 971
 972         if (acpi_numa > 0)
 973                 printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
 974 #endif
 975 }
 976
 977 static void __cpuinit init_intel(struct cpuinfo_x86 *c)
 978 {
 979         /* Cache sizes */
 980         unsigned n;
 981
 982         init_intel_cacheinfo(c);
 983         if (c->cpuid_level > 9 ) {
 984                 unsigned eax = cpuid_eax(10);
 985                 /* Check for version and the number of counters */
 986                 if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
 987                         set_bit(X86_FEATURE_ARCH_PERFMON, &c->x86_capability);
 988         }
 989
 990         n = c->extended_cpuid_level;
 991         if (n >= 0x80000008) {
 992                 unsigned eax = cpuid_eax(0x80000008);
 993                 c->x86_virt_bits = (eax >> 8) & 0xff;
 994                 c->x86_phys_bits = eax & 0xff;
 995                 /* CPUID workaround for Intel 0F34 CPU */
 996                 if (c->x86_vendor == X86_VENDOR_INTEL &&
 997                     c->x86 == 0xF && c->x86_model == 0x3 &&
 998                     c->x86_mask == 0x4)
 999                         c->x86_phys_bits = 36;
1000         }
1001
1002         if (c->x86 == 15)
1003                 c->x86_cache_alignment = c->x86_clflush_size * 2;
1004         if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
1005             (c->x86 == 0x6 && c->x86_model >= 0x0e))
1006                 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
1007         set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
1008         c->x86_max_cores = intel_num_cpu_cores(c);
1009
1010         srat_detect_node();
1011 }
1012
1013 static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
1014 {
1015         char *v = c->x86_vendor_id;
1016
1017         if (!strcmp(v, "AuthenticAMD"))
1018                 c->x86_vendor = X86_VENDOR_AMD;
1019         else if (!strcmp(v, "GenuineIntel"))
1020                 c->x86_vendor = X86_VENDOR_INTEL;
1021         else
1022                 c->x86_vendor = X86_VENDOR_UNKNOWN;
1023 }
1024
1025 struct cpu_model_info {
1026         int vendor;
1027         int family;
1028         char *model_names[16];
1029 };
1030
1031 /* Do some early cpuid on the boot CPU to get some parameter that are
1032    needed before check_bugs. Everything advanced is in identify_cpu
1033    below. */
1034 void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
1035 {
1036         u32 tfms;
1037
1038         c->loops_per_jiffy = loops_per_jiffy;
1039         c->x86_cache_size = -1;
1040         c->x86_vendor = X86_VENDOR_UNKNOWN;
1041         c->x86_model = c->x86_mask = 0; /* So far unknown... */
1042         c->x86_vendor_id[0] = '\0'; /* Unset */
1043         c->x86_model_id[0] = '\0';  /* Unset */
1044         c->x86_clflush_size = 64;
1045         c->x86_cache_alignment = c->x86_clflush_size;
1046         c->x86_max_cores = 1;
1047         c->extended_cpuid_level = 0;
1048         memset(&c->x86_capability, 0, sizeof c->x86_capability);
1049
1050         /* Get vendor name */
1051         cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
1052               (unsigned int *)&c->x86_vendor_id[0],
1053               (unsigned int *)&c->x86_vendor_id[8],
1054               (unsigned int *)&c->x86_vendor_id[4]);
1055
1056         get_cpu_vendor(c);
1057
1058         /* Initialize the standard set of capabilities */
1059         /* Note that the vendor-specific code below might override */
1060
1061         /* Intel-defined flags: level 0x00000001 */
1062         if (c->cpuid_level >= 0x00000001) {
1063                 __u32 misc;
1064                 cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
1065                       &c->x86_capability[0]);
1066                 c->x86 = (tfms >> 8) & 0xf;
1067                 c->x86_model = (tfms >> 4) & 0xf;
1068                 c->x86_mask = tfms & 0xf;
1069                 if (c->x86 == 0xf)
1070                         c->x86 += (tfms >> 20) & 0xff;
1071                 if (c->x86 >= 0x6)
1072                         c->x86_model += ((tfms >> 16) & 0xF) << 4;
1073                 if (c->x86_capability[0] & (1<<19))
1074                         c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
1075         } else {
1076                 /* Have CPUID level 0 only - unheard of */
1077                 c->x86 = 4;
1078         }
1079
1080 #ifdef CONFIG_SMP
1081         c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
1082 #endif
1083 }
1084
1085 /*
1086  * This does the hard work of actually picking apart the CPU stuff...
1087  */
1088 void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
1089 {
1090         int i;
1091         u32 xlvl;
1092
1093         early_identify_cpu(c);
1094
1095         /* AMD-defined flags: level 0x80000001 */
1096         xlvl = cpuid_eax(0x80000000);
1097         c->extended_cpuid_level = xlvl;
1098         if ((xlvl & 0xffff0000) == 0x80000000) {
1099                 if (xlvl >= 0x80000001) {
1100                         c->x86_capability[1] = cpuid_edx(0x80000001);
1101                         c->x86_capability[6] = cpuid_ecx(0x80000001);
1102                 }
1103                 if (xlvl >= 0x80000004)
1104                         get_model_name(c); /* Default name */
1105         }
1106
1107         /* Transmeta-defined flags: level 0x80860001 */
1108         xlvl = cpuid_eax(0x80860000);
1109         if ((xlvl & 0xffff0000) == 0x80860000) {
1110                 /* Don't set x86_cpuid_level here for now to not confuse. */
1111                 if (xlvl >= 0x80860001)
1112                         c->x86_capability[2] = cpuid_edx(0x80860001);
1113         }
1114
1115         c->apicid = phys_pkg_id(0);
1116
1117         /*
1118          * Vendor-specific initialization.  In this section we
1119          * canonicalize the feature flags, meaning if there are
1120          * features a certain CPU supports which CPUID doesn't
1121          * tell us, CPUID claiming incorrect flags, or other bugs,
1122          * we handle them here.
1123          *
1124          * At the end of this section, c->x86_capability better
1125          * indicate the features this CPU genuinely supports!
1126          */
1127         switch (c->x86_vendor) {
1128         case X86_VENDOR_AMD:
1129                 init_amd(c);
1130                 break;
1131
1132         case X86_VENDOR_INTEL:
1133                 init_intel(c);
1134                 break;
1135
1136         case X86_VENDOR_UNKNOWN:
1137         default:
1138                 display_cacheinfo(c);
1139                 break;
1140         }
1141
1142         select_idle_routine(c);
1143         detect_ht(c);
1144
1145         /*
1146          * On SMP, boot_cpu_data holds the common feature set between
1147          * all CPUs; so make sure that we indicate which features are
1148          * common between the CPUs.  The first time this routine gets
1149          * executed, c == &boot_cpu_data.
1150          */
1151         if (c != &boot_cpu_data) {
1152                 /* AND the already accumulated flags with these */
1153                 for (i = 0 ; i < NCAPINTS ; i++)
1154                         boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
1155         }
1156
1157 #ifdef CONFIG_X86_MCE
1158         mcheck_init(c);
1159 #endif
1160         if (c == &boot_cpu_data)
1161                 mtrr_bp_init();
1162         else
1163                 mtrr_ap_init();
1164 #ifdef CONFIG_NUMA
1165         numa_add_cpu(smp_processor_id());
1166 #endif
1167 }
1168
1169
1170 void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
1171 {
1172         if (c->x86_model_id[0])
1173                 printk("%s", c->x86_model_id);
1174
1175         if (c->x86_mask || c->cpuid_level >= 0)
1176                 printk(" stepping %02x\n", c->x86_mask);
1177         else
1178                 printk("\n");
1179 }
1180
1181 /*
1182  *      Get CPU information for use by the procfs.
1183  */
1184
1185 static int show_cpuinfo(struct seq_file *m, void *v)
1186 {
1187         struct cpuinfo_x86 *c = v;
1188
1189         /*
1190          * These flag bits must match the definitions in <asm/cpufeature.h>.
1191          * NULL means this bit is undefined or reserved; either way it doesn't
1192          * have meaning as far as Linux is concerned.  Note that it's important
1193          * to realize there is a difference between this table and CPUID -- if
1194          * applications want to get the raw CPUID data, they should access
1195          * /dev/cpu/<cpu_nr>/cpuid instead.
1196          */
1197         static char *x86_cap_flags[] = {
1198                 /* Intel-defined */
1199                 "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
1200                 "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
1201                 "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
1202                 "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL,
1203
1204                 /* AMD-defined */
1205                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1206                 NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
1207                 NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
1208                 NULL, "fxsr_opt", NULL, "rdtscp", NULL, "lm", "3dnowext", "3dnow",
1209
1210                 /* Transmeta-defined */
1211                 "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
1212                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1213                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1214                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1215
1216                 /* Other (Linux-defined) */
1217                 "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
1218                 "constant_tsc", NULL, NULL,
1219                 "up", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1220                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1221                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1222
1223                 /* Intel-defined (#2) */
1224                 "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
1225                 "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
1226                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1227                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1228
1229                 /* VIA/Cyrix/Centaur-defined */
1230                 NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
1231                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1232                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1233                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1234
1235                 /* AMD-defined (#2) */
1236                 "lahf_lm", "cmp_legacy", "svm", NULL, "cr8_legacy", NULL, NULL, NULL,
1237                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1238                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1239                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1240         };
1241         static char *x86_power_flags[] = {
1242                 "ts",   /* temperature sensor */
1243                 "fid",  /* frequency id control */
1244                 "vid",  /* voltage id control */
1245                 "ttp",  /* thermal trip */
1246                 "tm",
1247                 "stc",
1248                 NULL,
1249                 /* nothing */   /* constant_tsc - moved to flags */
1250         };
1251
1252
1253 #ifdef CONFIG_SMP
1254         if (!cpu_online(c-cpu_data))
1255                 return 0;
1256 #endif
1257
1258         seq_printf(m,"processor\t: %u\n"
1259                      "vendor_id\t: %s\n"
1260                      "cpu family\t: %d\n"
1261                      "model\t\t: %d\n"
1262                      "model name\t: %s\n",
1263                      (unsigned)(c-cpu_data),
1264                      c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
1265                      c->x86,
1266                      (int)c->x86_model,
1267                      c->x86_model_id[0] ? c->x86_model_id : "unknown");
1268
1269         if (c->x86_mask || c->cpuid_level >= 0)
1270                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
1271         else
1272                 seq_printf(m, "stepping\t: unknown\n");
1273
1274         if (cpu_has(c,X86_FEATURE_TSC)) {
1275                 unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data));
1276                 if (!freq)
1277                         freq = cpu_khz;
1278                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
1279                              freq / 1000, (freq % 1000));
1280         }
1281
1282         /* Cache size */
1283         if (c->x86_cache_size >= 0)
1284                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
1285
1286 #ifdef CONFIG_SMP
1287         if (smp_num_siblings * c->x86_max_cores > 1) {
1288                 int cpu = c - cpu_data;
1289                 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
1290                 seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[cpu]));
1291                 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
1292                 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
1293         }
1294 #endif
1295
1296         seq_printf(m,
1297                 "fpu\t\t: yes\n"
1298                 "fpu_exception\t: yes\n"
1299                 "cpuid level\t: %d\n"
1300                 "wp\t\t: yes\n"
1301                 "flags\t\t:",
1302                    c->cpuid_level);
1303
1304         {
1305                 int i;
1306                 for ( i = 0 ; i < 32*NCAPINTS ; i++ )
1307                         if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
1308                                 seq_printf(m, " %s", x86_cap_flags[i]);
1309         }
1310
1311         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
1312                    c->loops_per_jiffy/(500000/HZ),
1313                    (c->loops_per_jiffy/(5000/HZ)) % 100);
1314
1315         if (c->x86_tlbsize > 0)
1316                 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
1317         seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
1318         seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
1319
1320         seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
1321                    c->x86_phys_bits, c->x86_virt_bits);
1322
1323         seq_printf(m, "power management:");
1324         {
1325                 unsigned i;
1326                 for (i = 0; i < 32; i++)
1327                         if (c->x86_power & (1 << i)) {
1328                                 if (i < ARRAY_SIZE(x86_power_flags) &&
1329                                         x86_power_flags[i])
1330                                         seq_printf(m, "%s%s",
1331                                                 x86_power_flags[i][0]?" ":"",
1332                                                 x86_power_flags[i]);
1333                                 else
1334                                         seq_printf(m, " [%d]", i);
1335                         }
1336         }
1337
1338         seq_printf(m, "\n\n");
1339
1340         return 0;
1341 }
1342
1343 static void *c_start(struct seq_file *m, loff_t *pos)
1344 {
1345         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
1346 }
1347
1348 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1349 {
1350         ++*pos;
1351         return c_start(m, pos);
1352 }
1353
1354 static void c_stop(struct seq_file *m, void *v)
1355 {
1356 }
1357
1358 struct seq_operations cpuinfo_op = {
1359         .start =c_start,
1360         .next = c_next,
1361         .stop = c_stop,
1362         .show = show_cpuinfo,
1363 };
1364
1365 #if defined(CONFIG_INPUT_PCSPKR) || defined(CONFIG_INPUT_PCSPKR_MODULE)
1366 #include <linux/platform_device.h>
1367 static __init int add_pcspkr(void)
1368 {
1369         struct platform_device *pd;
1370         int ret;
1371
1372         pd = platform_device_alloc("pcspkr", -1);
1373         if (!pd)
1374                 return -ENOMEM;
1375
1376         ret = platform_device_add(pd);
1377         if (ret)
1378                 platform_device_put(pd);
1379
1380         return ret;
1381 }
1382 device_initcall(add_pcspkr);
1383 #endif