arch/x86/kernel/setup_32.c

   1 /*
   2  *  Copyright (C) 1995  Linus Torvalds
   3  *
   4  *  Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
   5  *
   6  *  Memory region support
   7  *      David Parsons <orc@pell.chi.il.us>, July-August 1999
   8  *
   9  *  Added E820 sanitization routine (removes overlapping memory regions);
  10  *  Brian Moyle <bmoyle@mvista.com>, February 2001
  11  *
  12  * Moved CPU detection code to cpu/${cpu}.c
  13  *    Patrick Mochel <mochel@osdl.org>, March 2002
  14  *
  15  *  Provisions for empty E820 memory regions (reported by certain BIOSes).
  16  *  Alex Achenbach <xela@slit.de>, December 2002.
  17  *
  18  */
  19
  20 /*
  21  * This file handles the architecture-dependent parts of initialization
  22  */
  23
  24 #include <linux/sched.h>
  25 #include <linux/mm.h>
  26 #include <linux/mmzone.h>
  27 #include <linux/screen_info.h>
  28 #include <linux/ioport.h>
  29 #include <linux/acpi.h>
  30 #include <linux/apm_bios.h>
  31 #include <linux/initrd.h>
  32 #include <linux/bootmem.h>
  33 #include <linux/seq_file.h>
  34 #include <linux/console.h>
  35 #include <linux/mca.h>
  36 #include <linux/root_dev.h>
  37 #include <linux/highmem.h>
  38 #include <linux/module.h>
  39 #include <linux/efi.h>
  40 #include <linux/init.h>
  41 #include <linux/edd.h>
  42 #include <linux/iscsi_ibft.h>
  43 #include <linux/nodemask.h>
  44 #include <linux/kexec.h>
  45 #include <linux/crash_dump.h>
  46 #include <linux/dmi.h>
  47 #include <linux/pfn.h>
  48 #include <linux/pci.h>
  49 #include <linux/init_ohci1394_dma.h>
  50 #include <linux/kvm_para.h>
  51
  52 #include <video/edid.h>
  53
  54 #include <asm/mtrr.h>
  55 #include <asm/apic.h>
  56 #include <asm/e820.h>
  57 #include <asm/mpspec.h>
  58 #include <asm/mmzone.h>
  59 #include <asm/setup.h>
  60 #include <asm/arch_hooks.h>
  61 #include <asm/sections.h>
  62 #include <asm/io_apic.h>
  63 #include <asm/ist.h>
  64 #include <asm/io.h>
  65 #include <asm/vmi.h>
  66 #include <setup_arch.h>
  67 #include <asm/bios_ebda.h>
  68 #include <asm/cacheflush.h>
  69 #include <asm/processor.h>
  70
  71 /* This value is set up by the early boot code to point to the value
  72    immediately after the boot time page tables.  It contains a *physical*
  73    address, and must not be in the .bss segment! */
  74 unsigned long init_pg_tables_start __initdata = ~0UL;
  75 unsigned long init_pg_tables_end __initdata = ~0UL;
  76
  77 /*
  78  * Machine setup..
  79  */
  80 static struct resource data_resource = {
  81         .name   = "Kernel data",
  82         .start  = 0,
  83         .end    = 0,
  84         .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
  85 };
  86
  87 static struct resource code_resource = {
  88         .name   = "Kernel code",
  89         .start  = 0,
  90         .end    = 0,
  91         .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
  92 };
  93
  94 static struct resource bss_resource = {
  95         .name   = "Kernel bss",
  96         .start  = 0,
  97         .end    = 0,
  98         .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
  99 };
 100
 101 static struct resource video_ram_resource = {
 102         .name   = "Video RAM area",
 103         .start  = 0xa0000,
 104         .end    = 0xbffff,
 105         .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
 106 };
 107
 108 static struct resource standard_io_resources[] = { {
 109         .name   = "dma1",
 110         .start  = 0x0000,
 111         .end    = 0x001f,
 112         .flags  = IORESOURCE_BUSY | IORESOURCE_IO
 113 }, {
 114         .name   = "pic1",
 115         .start  = 0x0020,
 116         .end    = 0x0021,
 117         .flags  = IORESOURCE_BUSY | IORESOURCE_IO
 118 }, {
 119         .name   = "timer0",
 120         .start  = 0x0040,
 121         .end    = 0x0043,
 122         .flags  = IORESOURCE_BUSY | IORESOURCE_IO
 123 }, {
 124         .name   = "timer1",
 125         .start  = 0x0050,
 126         .end    = 0x0053,
 127         .flags  = IORESOURCE_BUSY | IORESOURCE_IO
 128 }, {
 129         .name   = "keyboard",
 130         .start  = 0x0060,
 131         .end    = 0x0060,
 132         .flags  = IORESOURCE_BUSY | IORESOURCE_IO
 133 }, {
 134         .name   = "keyboard",
 135         .start  = 0x0064,
 136         .end    = 0x0064,
 137         .flags  = IORESOURCE_BUSY | IORESOURCE_IO
 138 }, {
 139         .name   = "dma page reg",
 140         .start  = 0x0080,
 141         .end    = 0x008f,
 142         .flags  = IORESOURCE_BUSY | IORESOURCE_IO
 143 }, {
 144         .name   = "pic2",
 145         .start  = 0x00a0,
 146         .end    = 0x00a1,
 147         .flags  = IORESOURCE_BUSY | IORESOURCE_IO
 148 }, {
 149         .name   = "dma2",
 150         .start  = 0x00c0,
 151         .end    = 0x00df,
 152         .flags  = IORESOURCE_BUSY | IORESOURCE_IO
 153 }, {
 154         .name   = "fpu",
 155         .start  = 0x00f0,
 156         .end    = 0x00ff,
 157         .flags  = IORESOURCE_BUSY | IORESOURCE_IO
 158 } };
 159
 160 /* cpu data as detected by the assembly code in head.S */
 161 struct cpuinfo_x86 new_cpu_data __cpuinitdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
 162 /* common cpu data for all cpus */
 163 struct cpuinfo_x86 boot_cpu_data __read_mostly = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
 164 EXPORT_SYMBOL(boot_cpu_data);
 165
 166 unsigned int def_to_bigsmp;
 167
 168 #ifndef CONFIG_X86_PAE
 169 unsigned long mmu_cr4_features;
 170 #else
 171 unsigned long mmu_cr4_features = X86_CR4_PAE;
 172 #endif
 173
 174 /* for MCA, but anyone else can use it if they want */
 175 unsigned int machine_id;
 176 unsigned int machine_submodel_id;
 177 unsigned int BIOS_revision;
 178
 179 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
 180 int bootloader_type;
 181
 182 /* user-defined highmem size */
 183 static unsigned int highmem_pages = -1;
 184
 185 /*
 186  * Setup options
 187  */
 188 struct screen_info screen_info;
 189 EXPORT_SYMBOL(screen_info);
 190 struct apm_info apm_info;
 191 EXPORT_SYMBOL(apm_info);
 192 struct edid_info edid_info;
 193 EXPORT_SYMBOL_GPL(edid_info);
 194 struct ist_info ist_info;
 195 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
 196         defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
 197 EXPORT_SYMBOL(ist_info);
 198 #endif
 199
 200 extern void early_cpu_init(void);
 201 extern int root_mountflags;
 202
 203 unsigned long saved_video_mode;
 204
 205 #define RAMDISK_IMAGE_START_MASK        0x07FF
 206 #define RAMDISK_PROMPT_FLAG             0x8000
 207 #define RAMDISK_LOAD_FLAG               0x4000
 208
 209 static char __initdata command_line[COMMAND_LINE_SIZE];
 210
 211 #ifndef CONFIG_DEBUG_BOOT_PARAMS
 212 struct boot_params __initdata boot_params;
 213 #else
 214 struct boot_params boot_params;
 215 #endif
 216
 217 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
 218 struct edd edd;
 219 #ifdef CONFIG_EDD_MODULE
 220 EXPORT_SYMBOL(edd);
 221 #endif
 222 /**
 223  * copy_edd() - Copy the BIOS EDD information
 224  *              from boot_params into a safe place.
 225  *
 226  */
 227 static inline void copy_edd(void)
 228 {
 229      memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
 230             sizeof(edd.mbr_signature));
 231      memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
 232      edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
 233      edd.edd_info_nr = boot_params.eddbuf_entries;
 234 }
 235 #else
 236 static inline void copy_edd(void)
 237 {
 238 }
 239 #endif
 240
 241 #ifdef CONFIG_PROC_VMCORE
 242 /* elfcorehdr= specifies the location of elf core header
 243  * stored by the crashed kernel.
 244  */
 245 static int __init parse_elfcorehdr(char *arg)
 246 {
 247         if (!arg)
 248                 return -EINVAL;
 249
 250         elfcorehdr_addr = memparse(arg, &arg);
 251         return 0;
 252 }
 253 early_param("elfcorehdr", parse_elfcorehdr);
 254 #endif /* CONFIG_PROC_VMCORE */
 255
 256 /*
 257  * highmem=size forces highmem to be exactly 'size' bytes.
 258  * This works even on boxes that have no highmem otherwise.
 259  * This also works to reduce highmem size on bigger boxes.
 260  */
 261 static int __init parse_highmem(char *arg)
 262 {
 263         if (!arg)
 264                 return -EINVAL;
 265
 266         highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
 267         return 0;
 268 }
 269 early_param("highmem", parse_highmem);
 270
 271 /*
 272  * vmalloc=size forces the vmalloc area to be exactly 'size'
 273  * bytes. This can be used to increase (or decrease) the
 274  * vmalloc area - the default is 128m.
 275  */
 276 static int __init parse_vmalloc(char *arg)
 277 {
 278         if (!arg)
 279                 return -EINVAL;
 280
 281         __VMALLOC_RESERVE = memparse(arg, &arg);
 282         return 0;
 283 }
 284 early_param("vmalloc", parse_vmalloc);
 285
 286 /*
 287  * reservetop=size reserves a hole at the top of the kernel address space which
 288  * a hypervisor can load into later.  Needed for dynamically loaded hypervisors,
 289  * so relocating the fixmap can be done before paging initialization.
 290  */
 291 static int __init parse_reservetop(char *arg)
 292 {
 293         unsigned long address;
 294
 295         if (!arg)
 296                 return -EINVAL;
 297
 298         address = memparse(arg, &arg);
 299         reserve_top_address(address);
 300         return 0;
 301 }
 302 early_param("reservetop", parse_reservetop);
 303
 304 /*
 305  * Determine low and high memory ranges:
 306  */
 307 unsigned long __init find_max_low_pfn(void)
 308 {
 309         unsigned long max_low_pfn;
 310
 311         max_low_pfn = max_pfn;
 312         if (max_low_pfn > MAXMEM_PFN) {
 313                 if (highmem_pages == -1)
 314                         highmem_pages = max_pfn - MAXMEM_PFN;
 315                 if (highmem_pages + MAXMEM_PFN < max_pfn)
 316                         max_pfn = MAXMEM_PFN + highmem_pages;
 317                 if (highmem_pages + MAXMEM_PFN > max_pfn) {
 318                         printk("only %luMB highmem pages available, ignoring highmem size of %uMB.\n", pages_to_mb(max_pfn - MAXMEM_PFN), pages_to_mb(highmem_pages));
 319                         highmem_pages = 0;
 320                 }
 321                 max_low_pfn = MAXMEM_PFN;
 322 #ifndef CONFIG_HIGHMEM
 323                 /* Maximum memory usable is what is directly addressable */
 324                 printk(KERN_WARNING "Warning only %ldMB will be used.\n",
 325                                         MAXMEM>>20);
 326                 if (max_pfn > MAX_NONPAE_PFN)
 327                         printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
 328                 else
 329                         printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
 330                 max_pfn = MAXMEM_PFN;
 331 #else /* !CONFIG_HIGHMEM */
 332 #ifndef CONFIG_HIGHMEM64G
 333                 if (max_pfn > MAX_NONPAE_PFN) {
 334                         max_pfn = MAX_NONPAE_PFN;
 335                         printk(KERN_WARNING "Warning only 4GB will be used.\n");
 336                         printk(KERN_WARNING "Use a HIGHMEM64G enabled kernel.\n");
 337                 }
 338 #endif /* !CONFIG_HIGHMEM64G */
 339 #endif /* !CONFIG_HIGHMEM */
 340         } else {
 341                 if (highmem_pages == -1)
 342                         highmem_pages = 0;
 343 #ifdef CONFIG_HIGHMEM
 344                 if (highmem_pages >= max_pfn) {
 345                         printk(KERN_ERR "highmem size specified (%uMB) is bigger than pages available (%luMB)!.\n", pages_to_mb(highmem_pages), pages_to_mb(max_pfn));
 346                         highmem_pages = 0;
 347                 }
 348                 if (highmem_pages) {
 349                         if (max_low_pfn-highmem_pages < 64*1024*1024/PAGE_SIZE){
 350                                 printk(KERN_ERR "highmem size %uMB results in smaller than 64MB lowmem, ignoring it.\n", pages_to_mb(highmem_pages));
 351                                 highmem_pages = 0;
 352                         }
 353                         max_low_pfn -= highmem_pages;
 354                 }
 355 #else
 356                 if (highmem_pages)
 357                         printk(KERN_ERR "ignoring highmem size on non-highmem kernel!\n");
 358 #endif
 359         }
 360         return max_low_pfn;
 361 }
 362
 363 #ifndef CONFIG_NEED_MULTIPLE_NODES
 364 static void __init setup_bootmem_allocator(void);
 365 static unsigned long __init setup_memory(void)
 366 {
 367         /*
 368          * partially used pages are not usable - thus
 369          * we are rounding upwards:
 370          */
 371         min_low_pfn = PFN_UP(init_pg_tables_end);
 372
 373         max_low_pfn = find_max_low_pfn();
 374
 375 #ifdef CONFIG_HIGHMEM
 376         highstart_pfn = highend_pfn = max_pfn;
 377         if (max_pfn > max_low_pfn) {
 378                 highstart_pfn = max_low_pfn;
 379         }
 380         printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
 381                 pages_to_mb(highend_pfn - highstart_pfn));
 382         num_physpages = highend_pfn;
 383         high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
 384 #else
 385         num_physpages = max_low_pfn;
 386         high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
 387 #endif
 388 #ifdef CONFIG_FLATMEM
 389         max_mapnr = num_physpages;
 390 #endif
 391         printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
 392                         pages_to_mb(max_low_pfn));
 393
 394         setup_bootmem_allocator();
 395
 396         return max_low_pfn;
 397 }
 398
 399 static void __init zone_sizes_init(void)
 400 {
 401         unsigned long max_zone_pfns[MAX_NR_ZONES];
 402         memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
 403         max_zone_pfns[ZONE_DMA] =
 404                 virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
 405         max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
 406 #ifdef CONFIG_HIGHMEM
 407         max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
 408         add_active_range(0, 0, highend_pfn);
 409 #else
 410         add_active_range(0, 0, max_low_pfn);
 411 #endif
 412
 413         free_area_init_nodes(max_zone_pfns);
 414 }
 415 #else
 416 extern unsigned long __init setup_memory(void);
 417 extern void zone_sizes_init(void);
 418 #endif /* !CONFIG_NEED_MULTIPLE_NODES */
 419
 420 static inline unsigned long long get_total_mem(void)
 421 {
 422         unsigned long long total;
 423
 424         total = max_low_pfn - min_low_pfn;
 425 #ifdef CONFIG_HIGHMEM
 426         total += highend_pfn - highstart_pfn;
 427 #endif
 428
 429         return total << PAGE_SHIFT;
 430 }
 431
 432 #ifdef CONFIG_KEXEC
 433 static void __init reserve_crashkernel(void)
 434 {
 435         unsigned long long total_mem;
 436         unsigned long long crash_size, crash_base;
 437         int ret;
 438
 439         total_mem = get_total_mem();
 440
 441         ret = parse_crashkernel(boot_command_line, total_mem,
 442                         &crash_size, &crash_base);
 443         if (ret == 0 && crash_size > 0) {
 444                 if (crash_base > 0) {
 445                         printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
 446                                         "for crashkernel (System RAM: %ldMB)\n",
 447                                         (unsigned long)(crash_size >> 20),
 448                                         (unsigned long)(crash_base >> 20),
 449                                         (unsigned long)(total_mem >> 20));
 450                         crashk_res.start = crash_base;
 451                         crashk_res.end   = crash_base + crash_size - 1;
 452                         reserve_bootmem(crash_base, crash_size,
 453                                         BOOTMEM_DEFAULT);
 454                 } else
 455                         printk(KERN_INFO "crashkernel reservation failed - "
 456                                         "you have to specify a base address\n");
 457         }
 458 }
 459 #else
 460 static inline void __init reserve_crashkernel(void)
 461 {}
 462 #endif
 463
 464 #ifdef CONFIG_BLK_DEV_INITRD
 465
 466 static bool do_relocate_initrd = false;
 467
 468 static void __init reserve_initrd(void)
 469 {
 470         u64 ramdisk_image = boot_params.hdr.ramdisk_image;
 471         u64 ramdisk_size  = boot_params.hdr.ramdisk_size;
 472         u64 ramdisk_end   = ramdisk_image + ramdisk_size;
 473         u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
 474         u64 ramdisk_here;
 475
 476         if (!boot_params.hdr.type_of_loader ||
 477             !ramdisk_image || !ramdisk_size)
 478                 return;         /* No initrd provided by bootloader */
 479
 480         initrd_start = 0;
 481
 482         if (ramdisk_size >= end_of_lowmem/2) {
 483                 free_early(ramdisk_image, ramdisk_end);
 484                 printk(KERN_ERR "initrd too large to handle, "
 485                        "disabling initrd\n");
 486                 return;
 487         }
 488
 489         printk(KERN_INFO "old RAMDISK: %08llx - %08llx\n", ramdisk_image,
 490                         ramdisk_end);
 491
 492
 493         if (ramdisk_end <= end_of_lowmem) {
 494                 /* All in lowmem, easy case */
 495                 /*
 496                  * don't need to reserve again, already reserved early
 497                  * in i386_start_kernel
 498                  */
 499                 initrd_start = ramdisk_image + PAGE_OFFSET;
 500                 initrd_end = initrd_start+ramdisk_size;
 501                 return;
 502         }
 503
 504         /* We need to move the initrd down into lowmem */
 505         ramdisk_here = find_e820_area(min_low_pfn<<PAGE_SHIFT,
 506                                  end_of_lowmem, ramdisk_size,
 507                                  PAGE_SIZE);
 508
 509         if (ramdisk_here == -1ULL)
 510                 panic("Cannot find place for new RAMDISK of size %lld\n",
 511                          ramdisk_size);
 512
 513         /* Note: this includes all the lowmem currently occupied by
 514            the initrd, we rely on that fact to keep the data intact. */
 515         reserve_early(ramdisk_here, ramdisk_here + ramdisk_size,
 516                          "NEW RAMDISK");
 517         initrd_start = ramdisk_here + PAGE_OFFSET;
 518         initrd_end   = initrd_start + ramdisk_size;
 519         printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n",
 520                          ramdisk_here, ramdisk_here + ramdisk_size);
 521
 522         do_relocate_initrd = true;
 523 }
 524
 525 #define MAX_MAP_CHUNK   (NR_FIX_BTMAPS << PAGE_SHIFT)
 526
 527 static void __init relocate_initrd(void)
 528 {
 529         u64 ramdisk_image = boot_params.hdr.ramdisk_image;
 530         u64 ramdisk_size  = boot_params.hdr.ramdisk_size;
 531         u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
 532         u64 ramdisk_here;
 533         unsigned long slop, clen, mapaddr;
 534         char *p, *q;
 535
 536         if (!do_relocate_initrd)
 537                 return;
 538
 539         ramdisk_here = initrd_start - PAGE_OFFSET;
 540
 541         q = (char *)initrd_start;
 542
 543         /* Copy any lowmem portion of the initrd */
 544         if (ramdisk_image < end_of_lowmem) {
 545                 clen = end_of_lowmem - ramdisk_image;
 546                 p = (char *)__va(ramdisk_image);
 547                 memcpy(q, p, clen);
 548                 q += clen;
 549                 /* need to free these low pages...*/
 550                 printk(KERN_INFO "Freeing old partial RAMDISK %08llx-%08llx\n",
 551                          ramdisk_image, ramdisk_image + clen - 1);
 552                 free_bootmem(ramdisk_image, clen);
 553                 ramdisk_image += clen;
 554                 ramdisk_size  -= clen;
 555         }
 556
 557         /* Copy the highmem portion of the initrd */
 558         while (ramdisk_size) {
 559                 slop = ramdisk_image & ~PAGE_MASK;
 560                 clen = ramdisk_size;
 561                 if (clen > MAX_MAP_CHUNK-slop)
 562                         clen = MAX_MAP_CHUNK-slop;
 563                 mapaddr = ramdisk_image & PAGE_MASK;
 564                 p = early_ioremap(mapaddr, clen+slop);
 565                 memcpy(q, p+slop, clen);
 566                 early_iounmap(p, clen+slop);
 567                 q += clen;
 568                 ramdisk_image += clen;
 569                 ramdisk_size  -= clen;
 570         }
 571         /* high pages is not converted by early_res_to_bootmem */
 572         ramdisk_image = boot_params.hdr.ramdisk_image;
 573         ramdisk_size  = boot_params.hdr.ramdisk_size;
 574         printk(KERN_INFO "Copied RAMDISK from %016llx - %016llx to %08llx - %08llx\n",
 575                 ramdisk_image, ramdisk_image + ramdisk_size - 1,
 576                 ramdisk_here, ramdisk_here + ramdisk_size - 1);
 577 }
 578
 579 #endif /* CONFIG_BLK_DEV_INITRD */
 580
 581 void __init setup_bootmem_allocator(void)
 582 {
 583         unsigned long bootmap_size, bootmap;
 584         /*
 585          * Initialize the boot-time allocator (with low memory only):
 586          */
 587         bootmap_size = bootmem_bootmap_pages(max_low_pfn)<<PAGE_SHIFT;
 588         bootmap = find_e820_area(min_low_pfn<<PAGE_SHIFT,
 589                                  max_low_pfn<<PAGE_SHIFT, bootmap_size,
 590                                  PAGE_SIZE);
 591         if (bootmap == -1L)
 592                 panic("Cannot find bootmem map of size %ld\n", bootmap_size);
 593         reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");
 594 #ifdef CONFIG_BLK_DEV_INITRD
 595         reserve_initrd();
 596 #endif
 597         bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, max_low_pfn);
 598         printk(KERN_INFO "  low ram: %08lx - %08lx\n",
 599                  min_low_pfn<<PAGE_SHIFT, max_low_pfn<<PAGE_SHIFT);
 600         printk(KERN_INFO "  bootmap %08lx - %08lx\n",
 601                  bootmap, bootmap + bootmap_size);
 602         register_bootmem_low_pages(max_low_pfn);
 603         early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
 604
 605 #ifdef CONFIG_ACPI_SLEEP
 606         /*
 607          * Reserve low memory region for sleep support.
 608          */
 609         acpi_reserve_bootmem();
 610 #endif
 611 #ifdef CONFIG_X86_FIND_SMP_CONFIG
 612         /*
 613          * Find and reserve possible boot-time SMP configuration:
 614          */
 615         find_smp_config();
 616 #endif
 617         reserve_crashkernel();
 618
 619         reserve_ibft_region();
 620 }
 621
 622 /*
 623  * The node 0 pgdat is initialized before all of these because
 624  * it's needed for bootmem.  node>0 pgdats have their virtual
 625  * space allocated before the pagetables are in place to access
 626  * them, so they can't be cleared then.
 627  *
 628  * This should all compile down to nothing when NUMA is off.
 629  */
 630 static void __init remapped_pgdat_init(void)
 631 {
 632         int nid;
 633
 634         for_each_online_node(nid) {
 635                 if (nid != 0)
 636                         memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
 637         }
 638 }
 639
 640 #ifdef CONFIG_MCA
 641 static void set_mca_bus(int x)
 642 {
 643         MCA_bus = x;
 644 }
 645 #else
 646 static void set_mca_bus(int x) { }
 647 #endif
 648
 649 #ifdef CONFIG_NUMA
 650 /*
 651  * In the golden day, when everything among i386 and x86_64 will be
 652  * integrated, this will not live here
 653  */
 654 void *x86_cpu_to_node_map_early_ptr;
 655 int x86_cpu_to_node_map_init[NR_CPUS] = {
 656         [0 ... NR_CPUS-1] = NUMA_NO_NODE
 657 };
 658 DEFINE_PER_CPU(int, x86_cpu_to_node_map) = NUMA_NO_NODE;
 659 #endif
 660
 661 /*
 662  * Determine if we were loaded by an EFI loader.  If so, then we have also been
 663  * passed the efi memmap, systab, etc., so we should use these data structures
 664  * for initialization.  Note, the efi init code path is determined by the
 665  * global efi_enabled. This allows the same kernel image to be used on existing
 666  * systems (with a traditional BIOS) as well as on EFI systems.
 667  */
 668 void __init setup_arch(char **cmdline_p)
 669 {
 670         unsigned long max_low_pfn;
 671
 672         memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
 673         pre_setup_arch_hook();
 674         early_cpu_init();
 675         early_ioremap_init();
 676
 677 #ifdef CONFIG_EFI
 678         if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
 679                      "EL32", 4))
 680                 efi_enabled = 1;
 681 #endif
 682
 683         ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
 684         screen_info = boot_params.screen_info;
 685         edid_info = boot_params.edid_info;
 686         apm_info.bios = boot_params.apm_bios_info;
 687         ist_info = boot_params.ist_info;
 688         saved_video_mode = boot_params.hdr.vid_mode;
 689         if( boot_params.sys_desc_table.length != 0 ) {
 690                 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
 691                 machine_id = boot_params.sys_desc_table.table[0];
 692                 machine_submodel_id = boot_params.sys_desc_table.table[1];
 693                 BIOS_revision = boot_params.sys_desc_table.table[2];
 694         }
 695         bootloader_type = boot_params.hdr.type_of_loader;
 696
 697 #ifdef CONFIG_BLK_DEV_RAM
 698         rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
 699         rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
 700         rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
 701 #endif
 702         ARCH_SETUP
 703
 704         setup_memory_map();
 705
 706         copy_edd();
 707
 708         if (!boot_params.hdr.root_flags)
 709                 root_mountflags &= ~MS_RDONLY;
 710         init_mm.start_code = (unsigned long) _text;
 711         init_mm.end_code = (unsigned long) _etext;
 712         init_mm.end_data = (unsigned long) _edata;
 713         init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
 714
 715         code_resource.start = virt_to_phys(_text);
 716         code_resource.end = virt_to_phys(_etext)-1;
 717         data_resource.start = virt_to_phys(_etext);
 718         data_resource.end = virt_to_phys(_edata)-1;
 719         bss_resource.start = virt_to_phys(&__bss_start);
 720         bss_resource.end = virt_to_phys(&__bss_stop)-1;
 721
 722         parse_early_param();
 723
 724         finish_e820_parsing();
 725
 726         strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
 727         *cmdline_p = command_line;
 728
 729         if (efi_enabled)
 730                 efi_init();
 731
 732         /* update e820 for memory not covered by WB MTRRs */
 733         find_max_pfn();
 734         mtrr_bp_init();
 735         if (mtrr_trim_uncached_memory(max_pfn))
 736                 find_max_pfn();
 737
 738         max_low_pfn = setup_memory();
 739
 740 #ifdef CONFIG_KVM_CLOCK
 741         kvmclock_init();
 742 #endif
 743
 744 #ifdef CONFIG_VMI
 745         /*
 746          * Must be after max_low_pfn is determined, and before kernel
 747          * pagetables are setup.
 748          */
 749         vmi_init();
 750 #endif
 751         kvm_guest_init();
 752
 753         /*
 754          * NOTE: before this point _nobody_ is allowed to allocate
 755          * any memory using the bootmem allocator.  Although the
 756          * allocator is now initialised only the first 8Mb of the kernel
 757          * virtual address space has been mapped.  All allocations before
 758          * paging_init() has completed must use the alloc_bootmem_low_pages()
 759          * variant (which allocates DMA'able memory) and care must be taken
 760          * not to exceed the 8Mb limit.
 761          */
 762
 763         paging_init();
 764
 765         /*
 766          * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
 767          */
 768
 769 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
 770         if (init_ohci1394_dma_early)
 771                 init_ohci1394_dma_on_all_controllers();
 772 #endif
 773
 774         remapped_pgdat_init();
 775         sparse_init();
 776         zone_sizes_init();
 777
 778         /*
 779          * NOTE: at this point the bootmem allocator is fully available.
 780          */
 781
 782 #ifdef CONFIG_BLK_DEV_INITRD
 783         relocate_initrd();
 784 #endif
 785
 786         paravirt_post_allocator_init();
 787
 788         dmi_scan_machine();
 789
 790         io_delay_init();
 791
 792 #ifdef CONFIG_X86_SMP
 793         /*
 794          * setup to use the early static init tables during kernel startup
 795          * X86_SMP will exclude sub-arches that don't deal well with it.
 796          */
 797         x86_cpu_to_apicid_early_ptr = (void *)x86_cpu_to_apicid_init;
 798         x86_bios_cpu_apicid_early_ptr = (void *)x86_bios_cpu_apicid_init;
 799 #ifdef CONFIG_NUMA
 800         x86_cpu_to_node_map_early_ptr = (void *)x86_cpu_to_node_map_init;
 801 #endif
 802 #endif
 803
 804 #ifdef CONFIG_X86_GENERICARCH
 805         generic_apic_probe();
 806 #endif
 807
 808 #ifdef CONFIG_ACPI
 809         /*
 810          * Parse the ACPI tables for possible boot-time SMP configuration.
 811          */
 812         acpi_boot_table_init();
 813 #endif
 814
 815         early_quirks();
 816
 817 #ifdef CONFIG_ACPI
 818         acpi_boot_init();
 819
 820 #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
 821         if (def_to_bigsmp)
 822                 printk(KERN_WARNING "More than 8 CPUs detected and "
 823                         "CONFIG_X86_PC cannot handle it.\nUse "
 824                         "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
 825 #endif
 826 #endif
 827 #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
 828         if (smp_found_config)
 829                 get_smp_config();
 830 #endif
 831
 832         e820_setup_gap();
 833         e820_mark_nosave_regions(max_low_pfn);
 834
 835 #ifdef CONFIG_VT
 836 #if defined(CONFIG_VGA_CONSOLE)
 837         if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
 838                 conswitchp = &vga_con;
 839 #elif defined(CONFIG_DUMMY_CONSOLE)
 840         conswitchp = &dummy_con;
 841 #endif
 842 #endif
 843 }
 844
 845 /*
 846  * Request address space for all standard resources
 847  *
 848  * This is called just before pcibios_init(), which is also a
 849  * subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
 850  */
 851 static int __init request_standard_resources(void)
 852 {
 853         int i;
 854
 855         printk(KERN_INFO "Setting up standard PCI resources\n");
 856         init_iomem_resources(&code_resource, &data_resource, &bss_resource);
 857
 858         request_resource(&iomem_resource, &video_ram_resource);
 859
 860         /* request I/O space for devices used on all i[345]86 PCs */
 861         for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
 862                 request_resource(&ioport_resource, &standard_io_resources[i]);
 863         return 0;
 864 }
 865
 866 subsys_initcall(request_standard_resources);