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 #include <linux/ctype.h>
  50 #include <linux/suspend.h>
  51
  52 #include <asm/mtrr.h>
  53 #include <asm/uaccess.h>
  54 #include <asm/system.h>
  55 #include <asm/io.h>
  56 #include <asm/smp.h>
  57 #include <asm/msr.h>
  58 #include <asm/desc.h>
  59 #include <video/edid.h>
  60 #include <asm/e820.h>
  61 #include <asm/dma.h>
  62 #include <asm/mpspec.h>
  63 #include <asm/mmu_context.h>
  64 #include <asm/bootsetup.h>
  65 #include <asm/proto.h>
  66 #include <asm/setup.h>
  67 #include <asm/mach_apic.h>
  68 #include <asm/numa.h>
  69 #include <asm/swiotlb.h>
  70 #include <asm/sections.h>
  71 #include <asm/gart-mapping.h>
  72 #include <asm/dmi.h>
  73
  74 /*
  75  * Machine setup..
  76  */
  77
  78 struct cpuinfo_x86 boot_cpu_data __read_mostly;
  79
  80 unsigned long mmu_cr4_features;
  81
  82 int acpi_disabled;
  83 EXPORT_SYMBOL(acpi_disabled);
  84 #ifdef  CONFIG_ACPI
  85 extern int __initdata acpi_ht;
  86 extern acpi_interrupt_flags     acpi_sci_flags;
  87 int __initdata acpi_force = 0;
  88 #endif
  89
  90 int acpi_numa __initdata;
  91
  92 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
  93 int bootloader_type;
  94
  95 unsigned long saved_video_mode;
  96
  97 /*
  98  * Early DMI memory
  99  */
 100 int dmi_alloc_index;
 101 char dmi_alloc_data[DMI_MAX_DATA];
 102
 103 /*
 104  * Setup options
 105  */
 106 struct screen_info screen_info;
 107 struct sys_desc_table_struct {
 108         unsigned short length;
 109         unsigned char table[0];
 110 };
 111
 112 struct edid_info edid_info;
 113 struct e820map e820;
 114
 115 extern int root_mountflags;
 116
 117 char command_line[COMMAND_LINE_SIZE];
 118
 119 struct resource standard_io_resources[] = {
 120         { .name = "dma1", .start = 0x00, .end = 0x1f,
 121                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 122         { .name = "pic1", .start = 0x20, .end = 0x21,
 123                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 124         { .name = "timer0", .start = 0x40, .end = 0x43,
 125                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 126         { .name = "timer1", .start = 0x50, .end = 0x53,
 127                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 128         { .name = "keyboard", .start = 0x60, .end = 0x6f,
 129                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 130         { .name = "dma page reg", .start = 0x80, .end = 0x8f,
 131                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 132         { .name = "pic2", .start = 0xa0, .end = 0xa1,
 133                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 134         { .name = "dma2", .start = 0xc0, .end = 0xdf,
 135                 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
 136         { .name = "fpu", .start = 0xf0, .end = 0xff,
 137                 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
 138 };
 139
 140 #define STANDARD_IO_RESOURCES \
 141         (sizeof standard_io_resources / sizeof standard_io_resources[0])
 142
 143 #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
 144
 145 struct resource data_resource = {
 146         .name = "Kernel data",
 147         .start = 0,
 148         .end = 0,
 149         .flags = IORESOURCE_RAM,
 150 };
 151 struct resource code_resource = {
 152         .name = "Kernel code",
 153         .start = 0,
 154         .end = 0,
 155         .flags = IORESOURCE_RAM,
 156 };
 157
 158 #define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)
 159
 160 static struct resource system_rom_resource = {
 161         .name = "System ROM",
 162         .start = 0xf0000,
 163         .end = 0xfffff,
 164         .flags = IORESOURCE_ROM,
 165 };
 166
 167 static struct resource extension_rom_resource = {
 168         .name = "Extension ROM",
 169         .start = 0xe0000,
 170         .end = 0xeffff,
 171         .flags = IORESOURCE_ROM,
 172 };
 173
 174 static struct resource adapter_rom_resources[] = {
 175         { .name = "Adapter ROM", .start = 0xc8000, .end = 0,
 176                 .flags = IORESOURCE_ROM },
 177         { .name = "Adapter ROM", .start = 0, .end = 0,
 178                 .flags = IORESOURCE_ROM },
 179         { .name = "Adapter ROM", .start = 0, .end = 0,
 180                 .flags = IORESOURCE_ROM },
 181         { .name = "Adapter ROM", .start = 0, .end = 0,
 182                 .flags = IORESOURCE_ROM },
 183         { .name = "Adapter ROM", .start = 0, .end = 0,
 184                 .flags = IORESOURCE_ROM },
 185         { .name = "Adapter ROM", .start = 0, .end = 0,
 186                 .flags = IORESOURCE_ROM }
 187 };
 188
 189 #define ADAPTER_ROM_RESOURCES \
 190         (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
 191
 192 static struct resource video_rom_resource = {
 193         .name = "Video ROM",
 194         .start = 0xc0000,
 195         .end = 0xc7fff,
 196         .flags = IORESOURCE_ROM,
 197 };
 198
 199 static struct resource video_ram_resource = {
 200         .name = "Video RAM area",
 201         .start = 0xa0000,
 202         .end = 0xbffff,
 203         .flags = IORESOURCE_RAM,
 204 };
 205
 206 #define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
 207
 208 static int __init romchecksum(unsigned char *rom, unsigned long length)
 209 {
 210         unsigned char *p, sum = 0;
 211
 212         for (p = rom; p < rom + length; p++)
 213                 sum += *p;
 214         return sum == 0;
 215 }
 216
 217 static void __init probe_roms(void)
 218 {
 219         unsigned long start, length, upper;
 220         unsigned char *rom;
 221         int           i;
 222
 223         /* video rom */
 224         upper = adapter_rom_resources[0].start;
 225         for (start = video_rom_resource.start; start < upper; start += 2048) {
 226                 rom = isa_bus_to_virt(start);
 227                 if (!romsignature(rom))
 228                         continue;
 229
 230                 video_rom_resource.start = start;
 231
 232                 /* 0 < length <= 0x7f * 512, historically */
 233                 length = rom[2] * 512;
 234
 235                 /* if checksum okay, trust length byte */
 236                 if (length && romchecksum(rom, length))
 237                         video_rom_resource.end = start + length - 1;
 238
 239                 request_resource(&iomem_resource, &video_rom_resource);
 240                 break;
 241                         }
 242
 243         start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
 244         if (start < upper)
 245                 start = upper;
 246
 247         /* system rom */
 248         request_resource(&iomem_resource, &system_rom_resource);
 249         upper = system_rom_resource.start;
 250
 251         /* check for extension rom (ignore length byte!) */
 252         rom = isa_bus_to_virt(extension_rom_resource.start);
 253         if (romsignature(rom)) {
 254                 length = extension_rom_resource.end - extension_rom_resource.start + 1;
 255                 if (romchecksum(rom, length)) {
 256                         request_resource(&iomem_resource, &extension_rom_resource);
 257                         upper = extension_rom_resource.start;
 258                 }
 259         }
 260
 261         /* check for adapter roms on 2k boundaries */
 262         for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
 263                 rom = isa_bus_to_virt(start);
 264                 if (!romsignature(rom))
 265                         continue;
 266
 267                 /* 0 < length <= 0x7f * 512, historically */
 268                 length = rom[2] * 512;
 269
 270                 /* but accept any length that fits if checksum okay */
 271                 if (!length || start + length > upper || !romchecksum(rom, length))
 272                         continue;
 273
 274                 adapter_rom_resources[i].start = start;
 275                 adapter_rom_resources[i].end = start + length - 1;
 276                 request_resource(&iomem_resource, &adapter_rom_resources[i]);
 277
 278                 start = adapter_rom_resources[i++].end & ~2047UL;
 279         }
 280 }
 281
 282 /* Check for full argument with no trailing characters */
 283 static int fullarg(char *p, char *arg)
 284 {
 285         int l = strlen(arg);
 286         return !memcmp(p, arg, l) && (p[l] == 0 || isspace(p[l]));
 287 }
 288
 289 static __init void parse_cmdline_early (char ** cmdline_p)
 290 {
 291         char c = ' ', *to = command_line, *from = COMMAND_LINE;
 292         int len = 0;
 293         int userdef = 0;
 294
 295         for (;;) {
 296                 if (c != ' ')
 297                         goto next_char;
 298
 299 #ifdef  CONFIG_SMP
 300                 /*
 301                  * If the BIOS enumerates physical processors before logical,
 302                  * maxcpus=N at enumeration-time can be used to disable HT.
 303                  */
 304                 else if (!memcmp(from, "maxcpus=", 8)) {
 305                         extern unsigned int maxcpus;
 306
 307                         maxcpus = simple_strtoul(from + 8, NULL, 0);
 308                 }
 309 #endif
 310 #ifdef CONFIG_ACPI
 311                 /* "acpi=off" disables both ACPI table parsing and interpreter init */
 312                 if (fullarg(from,"acpi=off"))
 313                         disable_acpi();
 314
 315                 if (fullarg(from, "acpi=force")) {
 316                         /* add later when we do DMI horrors: */
 317                         acpi_force = 1;
 318                         acpi_disabled = 0;
 319                 }
 320
 321                 /* acpi=ht just means: do ACPI MADT parsing
 322                    at bootup, but don't enable the full ACPI interpreter */
 323                 if (fullarg(from, "acpi=ht")) {
 324                         if (!acpi_force)
 325                                 disable_acpi();
 326                         acpi_ht = 1;
 327                 }
 328                 else if (fullarg(from, "pci=noacpi"))
 329                         acpi_disable_pci();
 330                 else if (fullarg(from, "acpi=noirq"))
 331                         acpi_noirq_set();
 332
 333                 else if (fullarg(from, "acpi_sci=edge"))
 334                         acpi_sci_flags.trigger =  1;
 335                 else if (fullarg(from, "acpi_sci=level"))
 336                         acpi_sci_flags.trigger = 3;
 337                 else if (fullarg(from, "acpi_sci=high"))
 338                         acpi_sci_flags.polarity = 1;
 339                 else if (fullarg(from, "acpi_sci=low"))
 340                         acpi_sci_flags.polarity = 3;
 341
 342                 /* acpi=strict disables out-of-spec workarounds */
 343                 else if (fullarg(from, "acpi=strict")) {
 344                         acpi_strict = 1;
 345                 }
 346 #ifdef CONFIG_X86_IO_APIC
 347                 else if (fullarg(from, "acpi_skip_timer_override"))
 348                         acpi_skip_timer_override = 1;
 349 #endif
 350 #endif
 351
 352                 if (fullarg(from, "disable_timer_pin_1"))
 353                         disable_timer_pin_1 = 1;
 354                 if (fullarg(from, "enable_timer_pin_1"))
 355                         disable_timer_pin_1 = -1;
 356
 357                 if (fullarg(from, "nolapic") || fullarg(from, "disableapic")) {
 358                         clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
 359                         disable_apic = 1;
 360                 }
 361
 362                 if (fullarg(from, "noapic"))
 363                         skip_ioapic_setup = 1;
 364
 365                 if (fullarg(from,"apic")) {
 366                         skip_ioapic_setup = 0;
 367                         ioapic_force = 1;
 368                 }
 369
 370                 if (!memcmp(from, "mem=", 4))
 371                         parse_memopt(from+4, &from);
 372
 373                 if (!memcmp(from, "memmap=", 7)) {
 374                         /* exactmap option is for used defined memory */
 375                         if (!memcmp(from+7, "exactmap", 8)) {
 376 #ifdef CONFIG_CRASH_DUMP
 377                                 /* If we are doing a crash dump, we
 378                                  * still need to know the real mem
 379                                  * size before original memory map is
 380                                  * reset.
 381                                  */
 382                                 saved_max_pfn = e820_end_of_ram();
 383 #endif
 384                                 from += 8+7;
 385                                 end_pfn_map = 0;
 386                                 e820.nr_map = 0;
 387                                 userdef = 1;
 388                         }
 389                         else {
 390                                 parse_memmapopt(from+7, &from);
 391                                 userdef = 1;
 392                         }
 393                 }
 394
 395 #ifdef CONFIG_NUMA
 396                 if (!memcmp(from, "numa=", 5))
 397                         numa_setup(from+5);
 398 #endif
 399
 400                 if (!memcmp(from,"iommu=",6)) {
 401                         iommu_setup(from+6);
 402                 }
 403
 404                 if (fullarg(from,"oops=panic"))
 405                         panic_on_oops = 1;
 406
 407                 if (!memcmp(from, "noexec=", 7))
 408                         nonx_setup(from + 7);
 409
 410 #ifdef CONFIG_KEXEC
 411                 /* crashkernel=size@addr specifies the location to reserve for
 412                  * a crash kernel.  By reserving this memory we guarantee
 413                  * that linux never set's it up as a DMA target.
 414                  * Useful for holding code to do something appropriate
 415                  * after a kernel panic.
 416                  */
 417                 else if (!memcmp(from, "crashkernel=", 12)) {
 418                         unsigned long size, base;
 419                         size = memparse(from+12, &from);
 420                         if (*from == '@') {
 421                                 base = memparse(from+1, &from);
 422                                 /* FIXME: Do I want a sanity check
 423                                  * to validate the memory range?
 424                                  */
 425                                 crashk_res.start = base;
 426                                 crashk_res.end   = base + size - 1;
 427                         }
 428                 }
 429 #endif
 430
 431 #ifdef CONFIG_PROC_VMCORE
 432                 /* elfcorehdr= specifies the location of elf core header
 433                  * stored by the crashed kernel. This option will be passed
 434                  * by kexec loader to the capture kernel.
 435                  */
 436                 else if(!memcmp(from, "elfcorehdr=", 11))
 437                         elfcorehdr_addr = memparse(from+11, &from);
 438 #endif
 439
 440 #ifdef CONFIG_HOTPLUG_CPU
 441                 else if (!memcmp(from, "additional_cpus=", 16))
 442                         setup_additional_cpus(from+16);
 443 #endif
 444
 445         next_char:
 446                 c = *(from++);
 447                 if (!c)
 448                         break;
 449                 if (COMMAND_LINE_SIZE <= ++len)
 450                         break;
 451                 *(to++) = c;
 452         }
 453         if (userdef) {
 454                 printk(KERN_INFO "user-defined physical RAM map:\n");
 455                 e820_print_map("user");
 456         }
 457         *to = '\0';
 458         *cmdline_p = command_line;
 459 }
 460
 461 #ifndef CONFIG_NUMA
 462 static void __init
 463 contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
 464 {
 465         unsigned long bootmap_size, bootmap;
 466
 467         bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
 468         bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
 469         if (bootmap == -1L)
 470                 panic("Cannot find bootmem map of size %ld\n",bootmap_size);
 471         bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
 472         e820_bootmem_free(NODE_DATA(0), 0, end_pfn << PAGE_SHIFT);
 473         reserve_bootmem(bootmap, bootmap_size);
 474 }
 475 #endif
 476
 477 /* Use inline assembly to define this because the nops are defined
 478    as inline assembly strings in the include files and we cannot
 479    get them easily into strings. */
 480 asm("\t.data\nk8nops: "
 481     K8_NOP1 K8_NOP2 K8_NOP3 K8_NOP4 K8_NOP5 K8_NOP6
 482     K8_NOP7 K8_NOP8);
 483
 484 extern unsigned char k8nops[];
 485 static unsigned char *k8_nops[ASM_NOP_MAX+1] = {
 486      NULL,
 487      k8nops,
 488      k8nops + 1,
 489      k8nops + 1 + 2,
 490      k8nops + 1 + 2 + 3,
 491      k8nops + 1 + 2 + 3 + 4,
 492      k8nops + 1 + 2 + 3 + 4 + 5,
 493      k8nops + 1 + 2 + 3 + 4 + 5 + 6,
 494      k8nops + 1 + 2 + 3 + 4 + 5 + 6 + 7,
 495 };
 496
 497 extern char __vsyscall_0;
 498
 499 /* Replace instructions with better alternatives for this CPU type.
 500
 501    This runs before SMP is initialized to avoid SMP problems with
 502    self modifying code. This implies that assymetric systems where
 503    APs have less capabilities than the boot processor are not handled.
 504    In this case boot with "noreplacement". */
 505 void apply_alternatives(void *start, void *end)
 506 {
 507         struct alt_instr *a;
 508         int diff, i, k;
 509         for (a = start; (void *)a < end; a++) {
 510                 u8 *instr;
 511
 512                 if (!boot_cpu_has(a->cpuid))
 513                         continue;
 514
 515                 BUG_ON(a->replacementlen > a->instrlen);
 516                 instr = a->instr;
 517                 /* vsyscall code is not mapped yet. resolve it manually. */
 518                 if (instr >= (u8 *)VSYSCALL_START && instr < (u8*)VSYSCALL_END)
 519                         instr = __va(instr - (u8*)VSYSCALL_START + (u8*)__pa_symbol(&__vsyscall_0));
 520                 __inline_memcpy(instr, a->replacement, a->replacementlen);
 521                 diff = a->instrlen - a->replacementlen;
 522
 523                 /* Pad the rest with nops */
 524                 for (i = a->replacementlen; diff > 0; diff -= k, i += k) {
 525                         k = diff;
 526                         if (k > ASM_NOP_MAX)
 527                                 k = ASM_NOP_MAX;
 528                         __inline_memcpy(instr + i, k8_nops[k], k);
 529                 }
 530         }
 531 }
 532
 533 static int no_replacement __initdata = 0;
 534
 535 void __init alternative_instructions(void)
 536 {
 537         extern struct alt_instr __alt_instructions[], __alt_instructions_end[];
 538         if (no_replacement)
 539                 return;
 540         apply_alternatives(__alt_instructions, __alt_instructions_end);
 541 }
 542
 543 static int __init noreplacement_setup(char *s)
 544 {
 545      no_replacement = 1;
 546      return 1;
 547 }
 548
 549 __setup("noreplacement", noreplacement_setup);
 550
 551 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
 552 struct edd edd;
 553 #ifdef CONFIG_EDD_MODULE
 554 EXPORT_SYMBOL(edd);
 555 #endif
 556 /**
 557  * copy_edd() - Copy the BIOS EDD information
 558  *              from boot_params into a safe place.
 559  *
 560  */
 561 static inline void copy_edd(void)
 562 {
 563      memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
 564      memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
 565      edd.mbr_signature_nr = EDD_MBR_SIG_NR;
 566      edd.edd_info_nr = EDD_NR;
 567 }
 568 #else
 569 static inline void copy_edd(void)
 570 {
 571 }
 572 #endif
 573
 574 #define EBDA_ADDR_POINTER 0x40E
 575
 576 unsigned __initdata ebda_addr;
 577 unsigned __initdata ebda_size;
 578
 579 static void discover_ebda(void)
 580 {
 581         /*
 582          * there is a real-mode segmented pointer pointing to the
 583          * 4K EBDA area at 0x40E
 584          */
 585         ebda_addr = *(unsigned short *)EBDA_ADDR_POINTER;
 586         ebda_addr <<= 4;
 587
 588         ebda_size = *(unsigned short *)(unsigned long)ebda_addr;
 589
 590         /* Round EBDA up to pages */
 591         if (ebda_size == 0)
 592                 ebda_size = 1;
 593         ebda_size <<= 10;
 594         ebda_size = round_up(ebda_size + (ebda_addr & ~PAGE_MASK), PAGE_SIZE);
 595         if (ebda_size > 64*1024)
 596                 ebda_size = 64*1024;
 597 }
 598
 599 #ifdef CONFIG_SOFTWARE_SUSPEND
 600 static void __init mark_nosave_page_range(unsigned long start, unsigned long end)
 601 {
 602         struct page *page;
 603         while (start <= end) {
 604                 page = pfn_to_page(start);
 605                 SetPageNosave(page);
 606                 start++;
 607         }
 608 }
 609
 610 static void __init e820_nosave_reserved_pages(void)
 611 {
 612         int i;
 613         unsigned long r_start = 0, r_end = 0;
 614
 615         /* Assume e820 map is sorted */
 616         for (i = 0; i < e820.nr_map; i++) {
 617                 struct e820entry *ei = &e820.map[i];
 618                 unsigned long start, end;
 619
 620                 start = round_down(ei->addr, PAGE_SIZE);
 621                 end = round_up(ei->addr + ei->size, PAGE_SIZE);
 622                 if (start >= end)
 623                         continue;
 624                 if (ei->type == E820_RESERVED)
 625                         continue;
 626                 r_end = start>>PAGE_SHIFT;
 627                 /* swsusp ignores invalid pfn, ignore these pages here */
 628                 if (r_end > end_pfn)
 629                         r_end = end_pfn;
 630                 if (r_end > r_start)
 631                         mark_nosave_page_range(r_start, r_end-1);
 632                 if (r_end >= end_pfn)
 633                         break;
 634                 r_start = end>>PAGE_SHIFT;
 635         }
 636 }
 637
 638 static void __init e820_save_acpi_pages(void)
 639 {
 640         int i;
 641
 642         /* Assume e820 map is sorted */
 643         for (i = 0; i < e820.nr_map; i++) {
 644                 struct e820entry *ei = &e820.map[i];
 645                 unsigned long start, end;
 646
 647                 start = ei->addr, PAGE_SIZE;
 648                 end = ei->addr + ei->size;
 649                 if (start >= end)
 650                         continue;
 651                 if (ei->type != E820_ACPI && ei->type != E820_NVS)
 652                         continue;
 653                 /*
 654                  * If the region is below end_pfn, it will be
 655                  * saved/restored by swsusp follow 'RAM' type.
 656                  */
 657                 if (start < (end_pfn << PAGE_SHIFT))
 658                         start = end_pfn << PAGE_SHIFT;
 659                 if (end > start)
 660                         swsusp_add_arch_pages(start, end);
 661         }
 662 }
 663
 664 extern char __start_rodata, __end_rodata;
 665 /*
 666  * BIOS reserved region/hole - no save/restore
 667  * ACPI NVS - save/restore
 668  * ACPI Data - this is a little tricky, the mem could be used by OS after OS
 669  * reads tables from the region, but anyway save/restore the memory hasn't any
 670  * side effect and Linux runtime module load/unload might use it.
 671  * kernel rodata - no save/restore (kernel rodata isn't changed)
 672  */
 673 static int __init mark_nosave_pages(void)
 674 {
 675         unsigned long pfn_start, pfn_end;
 676
 677         /* BIOS reserved regions & holes */
 678         e820_nosave_reserved_pages();
 679
 680         /* kernel rodata */
 681         pfn_start = round_up(__pa_symbol(&__start_rodata), PAGE_SIZE) >> PAGE_SHIFT;
 682         pfn_end = round_down(__pa_symbol(&__end_rodata), PAGE_SIZE) >> PAGE_SHIFT;
 683         mark_nosave_page_range(pfn_start, pfn_end-1);
 684
 685         /* record ACPI Data/NVS as saveable */
 686         e820_save_acpi_pages();
 687
 688         return 0;
 689 }
 690 core_initcall(mark_nosave_pages);
 691 #endif
 692
 693 void __init setup_arch(char **cmdline_p)
 694 {
 695         unsigned long kernel_end;
 696
 697         ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
 698         screen_info = SCREEN_INFO;
 699         edid_info = EDID_INFO;
 700         saved_video_mode = SAVED_VIDEO_MODE;
 701         bootloader_type = LOADER_TYPE;
 702
 703 #ifdef CONFIG_BLK_DEV_RAM
 704         rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
 705         rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
 706         rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
 707 #endif
 708         setup_memory_region();
 709         copy_edd();
 710
 711         if (!MOUNT_ROOT_RDONLY)
 712                 root_mountflags &= ~MS_RDONLY;
 713         init_mm.start_code = (unsigned long) &_text;
 714         init_mm.end_code = (unsigned long) &_etext;
 715         init_mm.end_data = (unsigned long) &_edata;
 716         init_mm.brk = (unsigned long) &_end;
 717
 718         code_resource.start = virt_to_phys(&_text);
 719         code_resource.end = virt_to_phys(&_etext)-1;
 720         data_resource.start = virt_to_phys(&_etext);
 721         data_resource.end = virt_to_phys(&_edata)-1;
 722
 723         parse_cmdline_early(cmdline_p);
 724
 725         early_identify_cpu(&boot_cpu_data);
 726
 727         /*
 728          * partially used pages are not usable - thus
 729          * we are rounding upwards:
 730          */
 731         end_pfn = e820_end_of_ram();
 732         num_physpages = end_pfn;                /* for pfn_valid */
 733
 734         check_efer();
 735
 736         discover_ebda();
 737
 738         init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
 739
 740         dmi_scan_machine();
 741
 742         zap_low_mappings(0);
 743
 744 #ifdef CONFIG_ACPI
 745         /*
 746          * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
 747          * Call this early for SRAT node setup.
 748          */
 749         acpi_boot_table_init();
 750 #endif
 751
 752 #ifdef CONFIG_ACPI_NUMA
 753         /*
 754          * Parse SRAT to discover nodes.
 755          */
 756         acpi_numa_init();
 757 #endif
 758
 759 #ifdef CONFIG_NUMA
 760         numa_initmem_init(0, end_pfn);
 761 #else
 762         contig_initmem_init(0, end_pfn);
 763 #endif
 764
 765         /* Reserve direct mapping */
 766         reserve_bootmem_generic(table_start << PAGE_SHIFT,
 767                                 (table_end - table_start) << PAGE_SHIFT);
 768
 769         /* reserve kernel */
 770         kernel_end = round_up(__pa_symbol(&_end),PAGE_SIZE);
 771         reserve_bootmem_generic(HIGH_MEMORY, kernel_end - HIGH_MEMORY);
 772
 773         /*
 774          * reserve physical page 0 - it's a special BIOS page on many boxes,
 775          * enabling clean reboots, SMP operation, laptop functions.
 776          */
 777         reserve_bootmem_generic(0, PAGE_SIZE);
 778
 779         /* reserve ebda region */
 780         if (ebda_addr)
 781                 reserve_bootmem_generic(ebda_addr, ebda_size);
 782
 783 #ifdef CONFIG_SMP
 784         /*
 785          * But first pinch a few for the stack/trampoline stuff
 786          * FIXME: Don't need the extra page at 4K, but need to fix
 787          * trampoline before removing it. (see the GDT stuff)
 788          */
 789         reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);
 790
 791         /* Reserve SMP trampoline */
 792         reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
 793 #endif
 794
 795 #ifdef CONFIG_ACPI_SLEEP
 796        /*
 797         * Reserve low memory region for sleep support.
 798         */
 799        acpi_reserve_bootmem();
 800 #endif
 801 #ifdef CONFIG_X86_LOCAL_APIC
 802         /*
 803          * Find and reserve possible boot-time SMP configuration:
 804          */
 805         find_smp_config();
 806 #endif
 807 #ifdef CONFIG_BLK_DEV_INITRD
 808         if (LOADER_TYPE && INITRD_START) {
 809                 if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
 810                         reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
 811                         initrd_start =
 812                                 INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
 813                         initrd_end = initrd_start+INITRD_SIZE;
 814                 }
 815                 else {
 816                         printk(KERN_ERR "initrd extends beyond end of memory "
 817                             "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
 818                             (unsigned long)(INITRD_START + INITRD_SIZE),
 819                             (unsigned long)(end_pfn << PAGE_SHIFT));
 820                         initrd_start = 0;
 821                 }
 822         }
 823 #endif
 824 #ifdef CONFIG_KEXEC
 825         if (crashk_res.start != crashk_res.end) {
 826                 reserve_bootmem(crashk_res.start,
 827                         crashk_res.end - crashk_res.start + 1);
 828         }
 829 #endif
 830
 831         paging_init();
 832
 833         check_ioapic();
 834
 835         /*
 836          * set this early, so we dont allocate cpu0
 837          * if MADT list doesnt list BSP first
 838          * mpparse.c/MP_processor_info() allocates logical cpu numbers.
 839          */
 840         cpu_set(0, cpu_present_map);
 841 #ifdef CONFIG_ACPI
 842         /*
 843          * Read APIC and some other early information from ACPI tables.
 844          */
 845         acpi_boot_init();
 846 #endif
 847
 848         init_cpu_to_node();
 849
 850 #ifdef CONFIG_X86_LOCAL_APIC
 851         /*
 852          * get boot-time SMP configuration:
 853          */
 854         if (smp_found_config)
 855                 get_smp_config();
 856         init_apic_mappings();
 857 #endif
 858
 859         /*
 860          * Request address space for all standard RAM and ROM resources
 861          * and also for regions reported as reserved by the e820.
 862          */
 863         probe_roms();
 864         e820_reserve_resources();
 865
 866         request_resource(&iomem_resource, &video_ram_resource);
 867
 868         {
 869         unsigned i;
 870         /* request I/O space for devices used on all i[345]86 PCs */
 871         for (i = 0; i < STANDARD_IO_RESOURCES; i++)
 872                 request_resource(&ioport_resource, &standard_io_resources[i]);
 873         }
 874
 875         e820_setup_gap();
 876
 877 #ifdef CONFIG_GART_IOMMU
 878         iommu_hole_init();
 879 #endif
 880
 881 #ifdef CONFIG_VT
 882 #if defined(CONFIG_VGA_CONSOLE)
 883         conswitchp = &vga_con;
 884 #elif defined(CONFIG_DUMMY_CONSOLE)
 885         conswitchp = &dummy_con;
 886 #endif
 887 #endif
 888 }
 889
 890 static int __cpuinit get_model_name(struct cpuinfo_x86 *c)
 891 {
 892         unsigned int *v;
 893
 894         if (c->extended_cpuid_level < 0x80000004)
 895                 return 0;
 896
 897         v = (unsigned int *) c->x86_model_id;
 898         cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
 899         cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
 900         cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
 901         c->x86_model_id[48] = 0;
 902         return 1;
 903 }
 904
 905
 906 static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
 907 {
 908         unsigned int n, dummy, eax, ebx, ecx, edx;
 909
 910         n = c->extended_cpuid_level;
 911
 912         if (n >= 0x80000005) {
 913                 cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
 914                 printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
 915                         edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
 916                 c->x86_cache_size=(ecx>>24)+(edx>>24);
 917                 /* On K8 L1 TLB is inclusive, so don't count it */
 918                 c->x86_tlbsize = 0;
 919         }
 920
 921         if (n >= 0x80000006) {
 922                 cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
 923                 ecx = cpuid_ecx(0x80000006);
 924                 c->x86_cache_size = ecx >> 16;
 925                 c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
 926
 927                 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
 928                 c->x86_cache_size, ecx & 0xFF);
 929         }
 930
 931         if (n >= 0x80000007)
 932                 cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power);
 933         if (n >= 0x80000008) {
 934                 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
 935                 c->x86_virt_bits = (eax >> 8) & 0xff;
 936                 c->x86_phys_bits = eax & 0xff;
 937         }
 938 }
 939
 940 #ifdef CONFIG_NUMA
 941 static int nearby_node(int apicid)
 942 {
 943         int i;
 944         for (i = apicid - 1; i >= 0; i--) {
 945                 int node = apicid_to_node[i];
 946                 if (node != NUMA_NO_NODE && node_online(node))
 947                         return node;
 948         }
 949         for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) {
 950                 int node = apicid_to_node[i];
 951                 if (node != NUMA_NO_NODE && node_online(node))
 952                         return node;
 953         }
 954         return first_node(node_online_map); /* Shouldn't happen */
 955 }
 956 #endif
 957
 958 /*
 959  * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
 960  * Assumes number of cores is a power of two.
 961  */
 962 static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
 963 {
 964 #ifdef CONFIG_SMP
 965         int cpu = smp_processor_id();
 966         unsigned bits;
 967 #ifdef CONFIG_NUMA
 968         int node = 0;
 969         unsigned apicid = hard_smp_processor_id();
 970 #endif
 971
 972         bits = 0;
 973         while ((1 << bits) < c->x86_max_cores)
 974                 bits++;
 975
 976         /* Low order bits define the core id (index of core in socket) */
 977         cpu_core_id[cpu] = phys_proc_id[cpu] & ((1 << bits)-1);
 978         /* Convert the APIC ID into the socket ID */
 979         phys_proc_id[cpu] = phys_pkg_id(bits);
 980
 981 #ifdef CONFIG_NUMA
 982         node = phys_proc_id[cpu];
 983         if (apicid_to_node[apicid] != NUMA_NO_NODE)
 984                 node = apicid_to_node[apicid];
 985         if (!node_online(node)) {
 986                 /* Two possibilities here:
 987                    - The CPU is missing memory and no node was created.
 988                    In that case try picking one from a nearby CPU
 989                    - The APIC IDs differ from the HyperTransport node IDs
 990                    which the K8 northbridge parsing fills in.
 991                    Assume they are all increased by a constant offset,
 992                    but in the same order as the HT nodeids.
 993                    If that doesn't result in a usable node fall back to the
 994                    path for the previous case.  */
 995                 int ht_nodeid = apicid - (phys_proc_id[0] << bits);
 996                 if (ht_nodeid >= 0 &&
 997                     apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
 998                         node = apicid_to_node[ht_nodeid];
 999                 /* Pick a nearby node */
1000                 if (!node_online(node))
1001                         node = nearby_node(apicid);
1002         }
1003         numa_set_node(cpu, node);
1004
1005         printk(KERN_INFO "CPU %d/%x(%d) -> Node %d -> Core %d\n",
1006                         cpu, apicid, c->x86_max_cores, node, cpu_core_id[cpu]);
1007 #endif
1008 #endif
1009 }
1010
1011 static int __init init_amd(struct cpuinfo_x86 *c)
1012 {
1013         int r;
1014         unsigned level;
1015
1016 #ifdef CONFIG_SMP
1017         unsigned long value;
1018
1019         /*
1020          * Disable TLB flush filter by setting HWCR.FFDIS on K8
1021          * bit 6 of msr C001_0015
1022          *
1023          * Errata 63 for SH-B3 steppings
1024          * Errata 122 for all steppings (F+ have it disabled by default)
1025          */
1026         if (c->x86 == 15) {
1027                 rdmsrl(MSR_K8_HWCR, value);
1028                 value |= 1 << 6;
1029                 wrmsrl(MSR_K8_HWCR, value);
1030         }
1031 #endif
1032
1033         /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
1034            3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
1035         clear_bit(0*32+31, &c->x86_capability);
1036
1037         /* On C+ stepping K8 rep microcode works well for copy/memset */
1038         level = cpuid_eax(1);
1039         if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58))
1040                 set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
1041
1042         /* Enable workaround for FXSAVE leak */
1043         if (c->x86 >= 6)
1044                 set_bit(X86_FEATURE_FXSAVE_LEAK, &c->x86_capability);
1045
1046         r = get_model_name(c);
1047         if (!r) {
1048                 switch (c->x86) {
1049                 case 15:
1050                         /* Should distinguish Models here, but this is only
1051                            a fallback anyways. */
1052                         strcpy(c->x86_model_id, "Hammer");
1053                         break;
1054                 }
1055         }
1056         display_cacheinfo(c);
1057
1058         /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
1059         if (c->x86_power & (1<<8))
1060                 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
1061
1062         if (c->extended_cpuid_level >= 0x80000008) {
1063                 c->x86_max_cores = (cpuid_ecx(0x80000008) & 0xff) + 1;
1064
1065                 amd_detect_cmp(c);
1066         }
1067
1068         return r;
1069 }
1070
1071 static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
1072 {
1073 #ifdef CONFIG_SMP
1074         u32     eax, ebx, ecx, edx;
1075         int     index_msb, core_bits;
1076         int     cpu = smp_processor_id();
1077
1078         cpuid(1, &eax, &ebx, &ecx, &edx);
1079
1080
1081         if (!cpu_has(c, X86_FEATURE_HT) || cpu_has(c, X86_FEATURE_CMP_LEGACY))
1082                 return;
1083
1084         smp_num_siblings = (ebx & 0xff0000) >> 16;
1085
1086         if (smp_num_siblings == 1) {
1087                 printk(KERN_INFO  "CPU: Hyper-Threading is disabled\n");
1088         } else if (smp_num_siblings > 1 ) {
1089
1090                 if (smp_num_siblings > NR_CPUS) {
1091                         printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
1092                         smp_num_siblings = 1;
1093                         return;
1094                 }
1095
1096                 index_msb = get_count_order(smp_num_siblings);
1097                 phys_proc_id[cpu] = phys_pkg_id(index_msb);
1098
1099                 printk(KERN_INFO  "CPU: Physical Processor ID: %d\n",
1100                        phys_proc_id[cpu]);
1101
1102                 smp_num_siblings = smp_num_siblings / c->x86_max_cores;
1103
1104                 index_msb = get_count_order(smp_num_siblings) ;
1105
1106                 core_bits = get_count_order(c->x86_max_cores);
1107
1108                 cpu_core_id[cpu] = phys_pkg_id(index_msb) &
1109                                                ((1 << core_bits) - 1);
1110
1111                 if (c->x86_max_cores > 1)
1112                         printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
1113                                cpu_core_id[cpu]);
1114         }
1115 #endif
1116 }
1117
1118 /*
1119  * find out the number of processor cores on the die
1120  */
1121 static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
1122 {
1123         unsigned int eax;
1124
1125         if (c->cpuid_level < 4)
1126                 return 1;
1127
1128         __asm__("cpuid"
1129                 : "=a" (eax)
1130                 : "0" (4), "c" (0)
1131                 : "bx", "dx");
1132
1133         if (eax & 0x1f)
1134                 return ((eax >> 26) + 1);
1135         else
1136                 return 1;
1137 }
1138
1139 static void srat_detect_node(void)
1140 {
1141 #ifdef CONFIG_NUMA
1142         unsigned node;
1143         int cpu = smp_processor_id();
1144
1145         /* Don't do the funky fallback heuristics the AMD version employs
1146            for now. */
1147         node = apicid_to_node[hard_smp_processor_id()];
1148         if (node == NUMA_NO_NODE)
1149                 node = first_node(node_online_map);
1150         numa_set_node(cpu, node);
1151
1152         if (acpi_numa > 0)
1153                 printk(KERN_INFO "CPU %d -> Node %d\n", cpu, node);
1154 #endif
1155 }
1156
1157 static void __cpuinit init_intel(struct cpuinfo_x86 *c)
1158 {
1159         /* Cache sizes */
1160         unsigned n;
1161
1162         init_intel_cacheinfo(c);
1163         n = c->extended_cpuid_level;
1164         if (n >= 0x80000008) {
1165                 unsigned eax = cpuid_eax(0x80000008);
1166                 c->x86_virt_bits = (eax >> 8) & 0xff;
1167                 c->x86_phys_bits = eax & 0xff;
1168                 /* CPUID workaround for Intel 0F34 CPU */
1169                 if (c->x86_vendor == X86_VENDOR_INTEL &&
1170                     c->x86 == 0xF && c->x86_model == 0x3 &&
1171                     c->x86_mask == 0x4)
1172                         c->x86_phys_bits = 36;
1173         }
1174
1175         if (c->x86 == 15)
1176                 c->x86_cache_alignment = c->x86_clflush_size * 2;
1177         if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
1178             (c->x86 == 0x6 && c->x86_model >= 0x0e))
1179                 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
1180         set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
1181         c->x86_max_cores = intel_num_cpu_cores(c);
1182
1183         srat_detect_node();
1184 }
1185
1186 static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
1187 {
1188         char *v = c->x86_vendor_id;
1189
1190         if (!strcmp(v, "AuthenticAMD"))
1191                 c->x86_vendor = X86_VENDOR_AMD;
1192         else if (!strcmp(v, "GenuineIntel"))
1193                 c->x86_vendor = X86_VENDOR_INTEL;
1194         else
1195                 c->x86_vendor = X86_VENDOR_UNKNOWN;
1196 }
1197
1198 struct cpu_model_info {
1199         int vendor;
1200         int family;
1201         char *model_names[16];
1202 };
1203
1204 /* Do some early cpuid on the boot CPU to get some parameter that are
1205    needed before check_bugs. Everything advanced is in identify_cpu
1206    below. */
1207 void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
1208 {
1209         u32 tfms;
1210
1211         c->loops_per_jiffy = loops_per_jiffy;
1212         c->x86_cache_size = -1;
1213         c->x86_vendor = X86_VENDOR_UNKNOWN;
1214         c->x86_model = c->x86_mask = 0; /* So far unknown... */
1215         c->x86_vendor_id[0] = '\0'; /* Unset */
1216         c->x86_model_id[0] = '\0';  /* Unset */
1217         c->x86_clflush_size = 64;
1218         c->x86_cache_alignment = c->x86_clflush_size;
1219         c->x86_max_cores = 1;
1220         c->extended_cpuid_level = 0;
1221         memset(&c->x86_capability, 0, sizeof c->x86_capability);
1222
1223         /* Get vendor name */
1224         cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
1225               (unsigned int *)&c->x86_vendor_id[0],
1226               (unsigned int *)&c->x86_vendor_id[8],
1227               (unsigned int *)&c->x86_vendor_id[4]);
1228
1229         get_cpu_vendor(c);
1230
1231         /* Initialize the standard set of capabilities */
1232         /* Note that the vendor-specific code below might override */
1233
1234         /* Intel-defined flags: level 0x00000001 */
1235         if (c->cpuid_level >= 0x00000001) {
1236                 __u32 misc;
1237                 cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
1238                       &c->x86_capability[0]);
1239                 c->x86 = (tfms >> 8) & 0xf;
1240                 c->x86_model = (tfms >> 4) & 0xf;
1241                 c->x86_mask = tfms & 0xf;
1242                 if (c->x86 == 0xf)
1243                         c->x86 += (tfms >> 20) & 0xff;
1244                 if (c->x86 >= 0x6)
1245                         c->x86_model += ((tfms >> 16) & 0xF) << 4;
1246                 if (c->x86_capability[0] & (1<<19))
1247                         c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
1248         } else {
1249                 /* Have CPUID level 0 only - unheard of */
1250                 c->x86 = 4;
1251         }
1252
1253 #ifdef CONFIG_SMP
1254         phys_proc_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff;
1255 #endif
1256 }
1257
1258 /*
1259  * This does the hard work of actually picking apart the CPU stuff...
1260  */
1261 void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
1262 {
1263         int i;
1264         u32 xlvl;
1265
1266         early_identify_cpu(c);
1267
1268         /* AMD-defined flags: level 0x80000001 */
1269         xlvl = cpuid_eax(0x80000000);
1270         c->extended_cpuid_level = xlvl;
1271         if ((xlvl & 0xffff0000) == 0x80000000) {
1272                 if (xlvl >= 0x80000001) {
1273                         c->x86_capability[1] = cpuid_edx(0x80000001);
1274                         c->x86_capability[6] = cpuid_ecx(0x80000001);
1275                 }
1276                 if (xlvl >= 0x80000004)
1277                         get_model_name(c); /* Default name */
1278         }
1279
1280         /* Transmeta-defined flags: level 0x80860001 */
1281         xlvl = cpuid_eax(0x80860000);
1282         if ((xlvl & 0xffff0000) == 0x80860000) {
1283                 /* Don't set x86_cpuid_level here for now to not confuse. */
1284                 if (xlvl >= 0x80860001)
1285                         c->x86_capability[2] = cpuid_edx(0x80860001);
1286         }
1287
1288         c->apicid = phys_pkg_id(0);
1289
1290         /*
1291          * Vendor-specific initialization.  In this section we
1292          * canonicalize the feature flags, meaning if there are
1293          * features a certain CPU supports which CPUID doesn't
1294          * tell us, CPUID claiming incorrect flags, or other bugs,
1295          * we handle them here.
1296          *
1297          * At the end of this section, c->x86_capability better
1298          * indicate the features this CPU genuinely supports!
1299          */
1300         switch (c->x86_vendor) {
1301         case X86_VENDOR_AMD:
1302                 init_amd(c);
1303                 break;
1304
1305         case X86_VENDOR_INTEL:
1306                 init_intel(c);
1307                 break;
1308
1309         case X86_VENDOR_UNKNOWN:
1310         default:
1311                 display_cacheinfo(c);
1312                 break;
1313         }
1314
1315         select_idle_routine(c);
1316         detect_ht(c);
1317
1318         /*
1319          * On SMP, boot_cpu_data holds the common feature set between
1320          * all CPUs; so make sure that we indicate which features are
1321          * common between the CPUs.  The first time this routine gets
1322          * executed, c == &boot_cpu_data.
1323          */
1324         if (c != &boot_cpu_data) {
1325                 /* AND the already accumulated flags with these */
1326                 for (i = 0 ; i < NCAPINTS ; i++)
1327                         boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
1328         }
1329
1330 #ifdef CONFIG_X86_MCE
1331         mcheck_init(c);
1332 #endif
1333         if (c == &boot_cpu_data)
1334                 mtrr_bp_init();
1335         else
1336                 mtrr_ap_init();
1337 #ifdef CONFIG_NUMA
1338         numa_add_cpu(smp_processor_id());
1339 #endif
1340 }
1341
1342
1343 void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
1344 {
1345         if (c->x86_model_id[0])
1346                 printk("%s", c->x86_model_id);
1347
1348         if (c->x86_mask || c->cpuid_level >= 0)
1349                 printk(" stepping %02x\n", c->x86_mask);
1350         else
1351                 printk("\n");
1352 }
1353
1354 /*
1355  *      Get CPU information for use by the procfs.
1356  */
1357
1358 static int show_cpuinfo(struct seq_file *m, void *v)
1359 {
1360         struct cpuinfo_x86 *c = v;
1361
1362         /*
1363          * These flag bits must match the definitions in <asm/cpufeature.h>.
1364          * NULL means this bit is undefined or reserved; either way it doesn't
1365          * have meaning as far as Linux is concerned.  Note that it's important
1366          * to realize there is a difference between this table and CPUID -- if
1367          * applications want to get the raw CPUID data, they should access
1368          * /dev/cpu/<cpu_nr>/cpuid instead.
1369          */
1370         static char *x86_cap_flags[] = {
1371                 /* Intel-defined */
1372                 "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
1373                 "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
1374                 "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
1375                 "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL,
1376
1377                 /* AMD-defined */
1378                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1379                 NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
1380                 NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
1381                 NULL, "fxsr_opt", "rdtscp", NULL, NULL, "lm", "3dnowext", "3dnow",
1382
1383                 /* Transmeta-defined */
1384                 "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
1385                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1386                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1387                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1388
1389                 /* Other (Linux-defined) */
1390                 "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
1391                 "constant_tsc", NULL, NULL,
1392                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1393                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1394                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1395
1396                 /* Intel-defined (#2) */
1397                 "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
1398                 "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
1399                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1400                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1401
1402                 /* VIA/Cyrix/Centaur-defined */
1403                 NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
1404                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1405                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1406                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1407
1408                 /* AMD-defined (#2) */
1409                 "lahf_lm", "cmp_legacy", "svm", NULL, "cr8_legacy", NULL, NULL, NULL,
1410                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1411                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1412                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1413         };
1414         static char *x86_power_flags[] = {
1415                 "ts",   /* temperature sensor */
1416                 "fid",  /* frequency id control */
1417                 "vid",  /* voltage id control */
1418                 "ttp",  /* thermal trip */
1419                 "tm",
1420                 "stc",
1421                 NULL,
1422                 /* nothing */   /* constant_tsc - moved to flags */
1423         };
1424
1425
1426 #ifdef CONFIG_SMP
1427         if (!cpu_online(c-cpu_data))
1428                 return 0;
1429 #endif
1430
1431         seq_printf(m,"processor\t: %u\n"
1432                      "vendor_id\t: %s\n"
1433                      "cpu family\t: %d\n"
1434                      "model\t\t: %d\n"
1435                      "model name\t: %s\n",
1436                      (unsigned)(c-cpu_data),
1437                      c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
1438                      c->x86,
1439                      (int)c->x86_model,
1440                      c->x86_model_id[0] ? c->x86_model_id : "unknown");
1441
1442         if (c->x86_mask || c->cpuid_level >= 0)
1443                 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
1444         else
1445                 seq_printf(m, "stepping\t: unknown\n");
1446
1447         if (cpu_has(c,X86_FEATURE_TSC)) {
1448                 unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data));
1449                 if (!freq)
1450                         freq = cpu_khz;
1451                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
1452                              freq / 1000, (freq % 1000));
1453         }
1454
1455         /* Cache size */
1456         if (c->x86_cache_size >= 0)
1457                 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
1458
1459 #ifdef CONFIG_SMP
1460         if (smp_num_siblings * c->x86_max_cores > 1) {
1461                 int cpu = c - cpu_data;
1462                 seq_printf(m, "physical id\t: %d\n", phys_proc_id[cpu]);
1463                 seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[cpu]));
1464                 seq_printf(m, "core id\t\t: %d\n", cpu_core_id[cpu]);
1465                 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
1466         }
1467 #endif
1468
1469         seq_printf(m,
1470                 "fpu\t\t: yes\n"
1471                 "fpu_exception\t: yes\n"
1472                 "cpuid level\t: %d\n"
1473                 "wp\t\t: yes\n"
1474                 "flags\t\t:",
1475                    c->cpuid_level);
1476
1477         {
1478                 int i;
1479                 for ( i = 0 ; i < 32*NCAPINTS ; i++ )
1480                         if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
1481                                 seq_printf(m, " %s", x86_cap_flags[i]);
1482         }
1483
1484         seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
1485                    c->loops_per_jiffy/(500000/HZ),
1486                    (c->loops_per_jiffy/(5000/HZ)) % 100);
1487
1488         if (c->x86_tlbsize > 0)
1489                 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
1490         seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
1491         seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
1492
1493         seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
1494                    c->x86_phys_bits, c->x86_virt_bits);
1495
1496         seq_printf(m, "power management:");
1497         {
1498                 unsigned i;
1499                 for (i = 0; i < 32; i++)
1500                         if (c->x86_power & (1 << i)) {
1501                                 if (i < ARRAY_SIZE(x86_power_flags) &&
1502                                         x86_power_flags[i])
1503                                         seq_printf(m, "%s%s",
1504                                                 x86_power_flags[i][0]?" ":"",
1505                                                 x86_power_flags[i]);
1506                                 else
1507                                         seq_printf(m, " [%d]", i);
1508                         }
1509         }
1510
1511         seq_printf(m, "\n\n");
1512
1513         return 0;
1514 }
1515
1516 static void *c_start(struct seq_file *m, loff_t *pos)
1517 {
1518         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
1519 }
1520
1521 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1522 {
1523         ++*pos;
1524         return c_start(m, pos);
1525 }
1526
1527 static void c_stop(struct seq_file *m, void *v)
1528 {
1529 }
1530
1531 struct seq_operations cpuinfo_op = {
1532         .start =c_start,
1533         .next = c_next,
1534         .stop = c_stop,
1535         .show = show_cpuinfo,
1536 };
1537
1538 #ifdef CONFIG_INPUT_PCSPKR
1539 #include <linux/platform_device.h>
1540 static __init int add_pcspkr(void)
1541 {
1542         struct platform_device *pd;
1543         int ret;
1544
1545         pd = platform_device_alloc("pcspkr", -1);
1546         if (!pd)
1547                 return -ENOMEM;
1548
1549         ret = platform_device_add(pd);
1550         if (ret)
1551                 platform_device_put(pd);
1552
1553         return ret;
1554 }
1555 device_initcall(add_pcspkr);
1556 #endif