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/sfi.h> 31#include <linux/apm_bios.h> 32#include <linux/initrd.h> 33#include <linux/bootmem.h> 34#include <linux/memblock.h> 35#include <linux/seq_file.h> 36#include <linux/console.h> 37#include <linux/mca.h> 38#include <linux/root_dev.h> 39#include <linux/highmem.h> 40#include <linux/module.h> 41#include <linux/efi.h> 42#include <linux/init.h> 43#include <linux/edd.h> 44#include <linux/iscsi_ibft.h> 45#include <linux/nodemask.h> 46#include <linux/kexec.h> 47#include <linux/dmi.h> 48#include <linux/pfn.h> 49#include <linux/pci.h> 50#include <asm/pci-direct.h> 51#include <linux/init_ohci1394_dma.h> 52#include <linux/kvm_para.h> 53 54#include <linux/errno.h> 55#include <linux/kernel.h> 56#include <linux/stddef.h> 57#include <linux/unistd.h> 58#include <linux/ptrace.h> 59#include <linux/user.h> 60#include <linux/delay.h> 61 62#include <linux/kallsyms.h> 63#include <linux/cpufreq.h> 64#include <linux/dma-mapping.h> 65#include <linux/ctype.h> 66#include <linux/uaccess.h> 67 68#include <linux/percpu.h> 69#include <linux/crash_dump.h> 70#include <linux/tboot.h> 71 72#include <video/edid.h> 73 74#include <asm/mtrr.h> 75#include <asm/apic.h> 76#include <asm/trampoline.h> 77#include <asm/e820.h> 78#include <asm/mpspec.h> 79#include <asm/setup.h> 80#include <asm/efi.h> 81#include <asm/timer.h> 82#include <asm/i8259.h> 83#include <asm/sections.h> 84#include <asm/dmi.h> 85#include <asm/io_apic.h> 86#include <asm/ist.h> 87#include <asm/setup_arch.h> 88#include <asm/bios_ebda.h> 89#include <asm/cacheflush.h> 90#include <asm/processor.h> 91#include <asm/bugs.h> 92 93#include <asm/vsyscall.h> 94#include <asm/cpu.h> 95#include <asm/desc.h> 96#include <asm/dma.h> 97#include <asm/iommu.h> 98#include <asm/gart.h> 99#include <asm/mmu_context.h> 100#include <asm/proto.h> 101 102#include <asm/paravirt.h> 103#include <asm/hypervisor.h> 104#include <asm/olpc_ofw.h> 105 106#include <asm/percpu.h> 107#include <asm/topology.h> 108#include <asm/apicdef.h> 109#include <asm/amd_nb.h> 110#ifdef CONFIG_X86_64 111#include <asm/numa_64.h> 112#endif 113#include <asm/mce.h> 114#include <asm/alternative.h> 115#include <asm/prom.h> 116 117/* 118 * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries. 119 * The direct mapping extends to max_pfn_mapped, so that we can directly access 120 * apertures, ACPI and other tables without having to play with fixmaps. 121 */ 122unsigned long max_low_pfn_mapped; 123unsigned long max_pfn_mapped; 124 125#ifdef CONFIG_DMI 126RESERVE_BRK(dmi_alloc, 65536); 127#endif 128 129 130static __initdata unsigned long _brk_start = (unsigned long)__brk_base; 131unsigned long _brk_end = (unsigned long)__brk_base; 132 133#ifdef CONFIG_X86_64 134int default_cpu_present_to_apicid(int mps_cpu) 135{ 136 return __default_cpu_present_to_apicid(mps_cpu); 137} 138 139int default_check_phys_apicid_present(int phys_apicid) 140{ 141 return __default_check_phys_apicid_present(phys_apicid); 142} 143#endif 144 145#ifndef CONFIG_DEBUG_BOOT_PARAMS 146struct boot_params __initdata boot_params; 147#else 148struct boot_params boot_params; 149#endif 150 151/* 152 * Machine setup.. 153 */ 154static struct resource data_resource = { 155 .name = "Kernel data", 156 .start = 0, 157 .end = 0, 158 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 159}; 160 161static struct resource code_resource = { 162 .name = "Kernel code", 163 .start = 0, 164 .end = 0, 165 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 166}; 167 168static struct resource bss_resource = { 169 .name = "Kernel bss", 170 .start = 0, 171 .end = 0, 172 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 173}; 174 175 176#ifdef CONFIG_X86_32 177/* cpu data as detected by the assembly code in head.S */ 178struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; 179/* common cpu data for all cpus */ 180struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; 181EXPORT_SYMBOL(boot_cpu_data); 182static void set_mca_bus(int x) 183{ 184#ifdef CONFIG_MCA 185 MCA_bus = x; 186#endif 187} 188 189unsigned int def_to_bigsmp; 190 191/* for MCA, but anyone else can use it if they want */ 192unsigned int machine_id; 193unsigned int machine_submodel_id; 194unsigned int BIOS_revision; 195 196struct apm_info apm_info; 197EXPORT_SYMBOL(apm_info); 198 199#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ 200 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) 201struct ist_info ist_info; 202EXPORT_SYMBOL(ist_info); 203#else 204struct ist_info ist_info; 205#endif 206 207#else 208struct cpuinfo_x86 boot_cpu_data __read_mostly = { 209 .x86_phys_bits = MAX_PHYSMEM_BITS, 210}; 211EXPORT_SYMBOL(boot_cpu_data); 212#endif 213 214 215#if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) 216unsigned long mmu_cr4_features; 217#else 218unsigned long mmu_cr4_features = X86_CR4_PAE; 219#endif 220 221/* Boot loader ID and version as integers, for the benefit of proc_dointvec */ 222int bootloader_type, bootloader_version; 223 224/* 225 * Setup options 226 */ 227struct screen_info screen_info; 228EXPORT_SYMBOL(screen_info); 229struct edid_info edid_info; 230EXPORT_SYMBOL_GPL(edid_info); 231 232extern int root_mountflags; 233 234unsigned long saved_video_mode; 235 236#define RAMDISK_IMAGE_START_MASK 0x07FF 237#define RAMDISK_PROMPT_FLAG 0x8000 238#define RAMDISK_LOAD_FLAG 0x4000 239 240static char __initdata command_line[COMMAND_LINE_SIZE]; 241#ifdef CONFIG_CMDLINE_BOOL 242static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; 243#endif 244 245#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) 246struct edd edd; 247#ifdef CONFIG_EDD_MODULE 248EXPORT_SYMBOL(edd); 249#endif 250/** 251 * copy_edd() - Copy the BIOS EDD information 252 * from boot_params into a safe place. 253 * 254 */ 255static inline void __init copy_edd(void) 256{ 257 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, 258 sizeof(edd.mbr_signature)); 259 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); 260 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; 261 edd.edd_info_nr = boot_params.eddbuf_entries; 262} 263#else 264static inline void __init copy_edd(void) 265{ 266} 267#endif 268 269void * __init extend_brk(size_t size, size_t align) 270{ 271 size_t mask = align - 1; 272 void *ret; 273 274 BUG_ON(_brk_start == 0); 275 BUG_ON(align & mask); 276 277 _brk_end = (_brk_end + mask) & ~mask; 278 BUG_ON((char *)(_brk_end + size) > __brk_limit); 279 280 ret = (void *)_brk_end; 281 _brk_end += size; 282 283 memset(ret, 0, size); 284 285 return ret; 286} 287 288#ifdef CONFIG_X86_64 289static void __init init_gbpages(void) 290{ 291 if (direct_gbpages && cpu_has_gbpages) 292 printk(KERN_INFO "Using GB pages for direct mapping\n"); 293 else 294 direct_gbpages = 0; 295} 296#else 297static inline void init_gbpages(void) 298{ 299} 300static void __init cleanup_highmap(void) 301{ 302} 303#endif 304 305static void __init reserve_brk(void) 306{ 307 if (_brk_end > _brk_start) 308 memblock_reserve(__pa(_brk_start), 309 __pa(_brk_end) - __pa(_brk_start)); 310 311 /* Mark brk area as locked down and no longer taking any 312 new allocations */ 313 _brk_start = 0; 314} 315 316#ifdef CONFIG_BLK_DEV_INITRD 317 318#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) 319static void __init relocate_initrd(void) 320{ 321 /* Assume only end is not page aligned */ 322 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 323 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 324 u64 area_size = PAGE_ALIGN(ramdisk_size); 325 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; 326 u64 ramdisk_here; 327 unsigned long slop, clen, mapaddr; 328 char *p, *q; 329 330 /* We need to move the initrd down into lowmem */ 331 ramdisk_here = memblock_find_in_range(0, end_of_lowmem, area_size, 332 PAGE_SIZE); 333 334 if (!ramdisk_here) 335 panic("Cannot find place for new RAMDISK of size %lld\n", 336 ramdisk_size); 337 338 /* Note: this includes all the lowmem currently occupied by 339 the initrd, we rely on that fact to keep the data intact. */ 340 memblock_reserve(ramdisk_here, area_size); 341 initrd_start = ramdisk_here + PAGE_OFFSET; 342 initrd_end = initrd_start + ramdisk_size; 343 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", 344 ramdisk_here, ramdisk_here + ramdisk_size); 345 346 q = (char *)initrd_start; 347 348 /* Copy any lowmem portion of the initrd */ 349 if (ramdisk_image < end_of_lowmem) { 350 clen = end_of_lowmem - ramdisk_image; 351 p = (char *)__va(ramdisk_image); 352 memcpy(q, p, clen); 353 q += clen; 354 ramdisk_image += clen; 355 ramdisk_size -= clen; 356 } 357 358 /* Copy the highmem portion of the initrd */ 359 while (ramdisk_size) { 360 slop = ramdisk_image & ~PAGE_MASK; 361 clen = ramdisk_size; 362 if (clen > MAX_MAP_CHUNK-slop) 363 clen = MAX_MAP_CHUNK-slop; 364 mapaddr = ramdisk_image & PAGE_MASK; 365 p = early_memremap(mapaddr, clen+slop); 366 memcpy(q, p+slop, clen); 367 early_iounmap(p, clen+slop); 368 q += clen; 369 ramdisk_image += clen; 370 ramdisk_size -= clen; 371 } 372 /* high pages is not converted by early_res_to_bootmem */ 373 ramdisk_image = boot_params.hdr.ramdisk_image; 374 ramdisk_size = boot_params.hdr.ramdisk_size; 375 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" 376 " %08llx - %08llx\n", 377 ramdisk_image, ramdisk_image + ramdisk_size - 1, 378 ramdisk_here, ramdisk_here + ramdisk_size - 1); 379} 380 381static void __init reserve_initrd(void) 382{ 383 /* Assume only end is not page aligned */ 384 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 385 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 386 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); 387 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; 388 389 if (!boot_params.hdr.type_of_loader || 390 !ramdisk_image || !ramdisk_size) 391 return; /* No initrd provided by bootloader */ 392 393 initrd_start = 0; 394 395 if (ramdisk_size >= (end_of_lowmem>>1)) { 396 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image); 397 printk(KERN_ERR "initrd too large to handle, " 398 "disabling initrd\n"); 399 return; 400 } 401 402 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, 403 ramdisk_end); 404 405 406 if (ramdisk_end <= end_of_lowmem) { 407 /* All in lowmem, easy case */ 408 /* 409 * don't need to reserve again, already reserved early 410 * in i386_start_kernel 411 */ 412 initrd_start = ramdisk_image + PAGE_OFFSET; 413 initrd_end = initrd_start + ramdisk_size; 414 return; 415 } 416 417 relocate_initrd(); 418 419 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image); 420} 421#else 422static void __init reserve_initrd(void) 423{ 424} 425#endif /* CONFIG_BLK_DEV_INITRD */ 426 427static void __init parse_setup_data(void) 428{ 429 struct setup_data *data; 430 u64 pa_data; 431 432 if (boot_params.hdr.version < 0x0209) 433 return; 434 pa_data = boot_params.hdr.setup_data; 435 while (pa_data) { 436 u32 data_len, map_len; 437 438 map_len = max(PAGE_SIZE - (pa_data & ~PAGE_MASK), 439 (u64)sizeof(struct setup_data)); 440 data = early_memremap(pa_data, map_len); 441 data_len = data->len + sizeof(struct setup_data); 442 if (data_len > map_len) { 443 early_iounmap(data, map_len); 444 data = early_memremap(pa_data, data_len); 445 map_len = data_len; 446 } 447 448 switch (data->type) { 449 case SETUP_E820_EXT: 450 parse_e820_ext(data); 451 break; 452 case SETUP_DTB: 453 add_dtb(pa_data); 454 break; 455 default: 456 break; 457 } 458 pa_data = data->next; 459 early_iounmap(data, map_len); 460 } 461} 462 463static void __init e820_reserve_setup_data(void) 464{ 465 struct setup_data *data; 466 u64 pa_data; 467 int found = 0; 468 469 if (boot_params.hdr.version < 0x0209) 470 return; 471 pa_data = boot_params.hdr.setup_data; 472 while (pa_data) { 473 data = early_memremap(pa_data, sizeof(*data)); 474 e820_update_range(pa_data, sizeof(*data)+data->len, 475 E820_RAM, E820_RESERVED_KERN); 476 found = 1; 477 pa_data = data->next; 478 early_iounmap(data, sizeof(*data)); 479 } 480 if (!found) 481 return; 482 483 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 484 memcpy(&e820_saved, &e820, sizeof(struct e820map)); 485 printk(KERN_INFO "extended physical RAM map:\n"); 486 e820_print_map("reserve setup_data"); 487} 488 489static void __init memblock_x86_reserve_range_setup_data(void) 490{ 491 struct setup_data *data; 492 u64 pa_data; 493 494 if (boot_params.hdr.version < 0x0209) 495 return; 496 pa_data = boot_params.hdr.setup_data; 497 while (pa_data) { 498 data = early_memremap(pa_data, sizeof(*data)); 499 memblock_reserve(pa_data, sizeof(*data) + data->len); 500 pa_data = data->next; 501 early_iounmap(data, sizeof(*data)); 502 } 503} 504 505/* 506 * --------- Crashkernel reservation ------------------------------ 507 */ 508 509#ifdef CONFIG_KEXEC 510 511/* 512 * Keep the crash kernel below this limit. On 32 bits earlier kernels 513 * would limit the kernel to the low 512 MiB due to mapping restrictions. 514 * On 64 bits, kexec-tools currently limits us to 896 MiB; increase this 515 * limit once kexec-tools are fixed. 516 */ 517#ifdef CONFIG_X86_32 518# define CRASH_KERNEL_ADDR_MAX (512 << 20) 519#else 520# define CRASH_KERNEL_ADDR_MAX (896 << 20) 521#endif 522 523static void __init reserve_crashkernel(void) 524{ 525 unsigned long long total_mem; 526 unsigned long long crash_size, crash_base; 527 int ret; 528 529 total_mem = memblock_phys_mem_size(); 530 531 ret = parse_crashkernel(boot_command_line, total_mem, 532 &crash_size, &crash_base); 533 if (ret != 0 || crash_size <= 0) 534 return; 535 536 /* 0 means: find the address automatically */ 537 if (crash_base <= 0) { 538 const unsigned long long alignment = 16<<20; /* 16M */ 539 540 /* 541 * kexec want bzImage is below CRASH_KERNEL_ADDR_MAX 542 */ 543 crash_base = memblock_find_in_range(alignment, 544 CRASH_KERNEL_ADDR_MAX, crash_size, alignment); 545 546 if (!crash_base) { 547 pr_info("crashkernel reservation failed - No suitable area found.\n"); 548 return; 549 } 550 } else { 551 unsigned long long start; 552 553 start = memblock_find_in_range(crash_base, 554 crash_base + crash_size, crash_size, 1<<20); 555 if (start != crash_base) { 556 pr_info("crashkernel reservation failed - memory is in use.\n"); 557 return; 558 } 559 } 560 memblock_reserve(crash_base, crash_size); 561 562 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " 563 "for crashkernel (System RAM: %ldMB)\n", 564 (unsigned long)(crash_size >> 20), 565 (unsigned long)(crash_base >> 20), 566 (unsigned long)(total_mem >> 20)); 567 568 crashk_res.start = crash_base; 569 crashk_res.end = crash_base + crash_size - 1; 570 insert_resource(&iomem_resource, &crashk_res); 571} 572#else 573static void __init reserve_crashkernel(void) 574{ 575} 576#endif 577 578static struct resource standard_io_resources[] = { 579 { .name = "dma1", .start = 0x00, .end = 0x1f, 580 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 581 { .name = "pic1", .start = 0x20, .end = 0x21, 582 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 583 { .name = "timer0", .start = 0x40, .end = 0x43, 584 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 585 { .name = "timer1", .start = 0x50, .end = 0x53, 586 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 587 { .name = "keyboard", .start = 0x60, .end = 0x60, 588 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 589 { .name = "keyboard", .start = 0x64, .end = 0x64, 590 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 591 { .name = "dma page reg", .start = 0x80, .end = 0x8f, 592 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 593 { .name = "pic2", .start = 0xa0, .end = 0xa1, 594 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 595 { .name = "dma2", .start = 0xc0, .end = 0xdf, 596 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 597 { .name = "fpu", .start = 0xf0, .end = 0xff, 598 .flags = IORESOURCE_BUSY | IORESOURCE_IO } 599}; 600 601void __init reserve_standard_io_resources(void) 602{ 603 int i; 604 605 /* request I/O space for devices used on all i[345]86 PCs */ 606 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) 607 request_resource(&ioport_resource, &standard_io_resources[i]); 608 609} 610 611static __init void reserve_ibft_region(void) 612{ 613 unsigned long addr, size = 0; 614 615 addr = find_ibft_region(&size); 616 617 if (size) 618 memblock_reserve(addr, size); 619} 620 621static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10; 622 623static void __init trim_bios_range(void) 624{ 625 /* 626 * A special case is the first 4Kb of memory; 627 * This is a BIOS owned area, not kernel ram, but generally 628 * not listed as such in the E820 table. 629 * 630 * This typically reserves additional memory (64KiB by default) 631 * since some BIOSes are known to corrupt low memory. See the 632 * Kconfig help text for X86_RESERVE_LOW. 633 */ 634 e820_update_range(0, ALIGN(reserve_low, PAGE_SIZE), 635 E820_RAM, E820_RESERVED); 636 637 /* 638 * special case: Some BIOSen report the PC BIOS 639 * area (640->1Mb) as ram even though it is not. 640 * take them out. 641 */ 642 e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1); 643 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 644} 645 646static int __init parse_reservelow(char *p) 647{ 648 unsigned long long size; 649 650 if (!p) 651 return -EINVAL; 652 653 size = memparse(p, &p); 654 655 if (size < 4096) 656 size = 4096; 657 658 if (size > 640*1024) 659 size = 640*1024; 660 661 reserve_low = size; 662 663 return 0; 664} 665 666early_param("reservelow", parse_reservelow); 667 668/* 669 * Determine if we were loaded by an EFI loader. If so, then we have also been 670 * passed the efi memmap, systab, etc., so we should use these data structures 671 * for initialization. Note, the efi init code path is determined by the 672 * global efi_enabled. This allows the same kernel image to be used on existing 673 * systems (with a traditional BIOS) as well as on EFI systems. 674 */ 675/* 676 * setup_arch - architecture-specific boot-time initializations 677 * 678 * Note: On x86_64, fixmaps are ready for use even before this is called. 679 */ 680 681void __init setup_arch(char **cmdline_p) 682{ 683#ifdef CONFIG_X86_32 684 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); 685 visws_early_detect(); 686 687 /* 688 * copy kernel address range established so far and switch 689 * to the proper swapper page table 690 */ 691 clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY, 692 initial_page_table + KERNEL_PGD_BOUNDARY, 693 KERNEL_PGD_PTRS); 694 695 load_cr3(swapper_pg_dir); 696 __flush_tlb_all(); 697#else 698 printk(KERN_INFO "Command line: %s\n", boot_command_line); 699#endif 700 701 /* 702 * If we have OLPC OFW, we might end up relocating the fixmap due to 703 * reserve_top(), so do this before touching the ioremap area. 704 */ 705 olpc_ofw_detect(); 706 707 early_trap_init(); 708 early_cpu_init(); 709 early_ioremap_init(); 710 711 setup_olpc_ofw_pgd(); 712 713 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); 714 screen_info = boot_params.screen_info; 715 edid_info = boot_params.edid_info; 716#ifdef CONFIG_X86_32 717 apm_info.bios = boot_params.apm_bios_info; 718 ist_info = boot_params.ist_info; 719 if (boot_params.sys_desc_table.length != 0) { 720 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); 721 machine_id = boot_params.sys_desc_table.table[0]; 722 machine_submodel_id = boot_params.sys_desc_table.table[1]; 723 BIOS_revision = boot_params.sys_desc_table.table[2]; 724 } 725#endif 726 saved_video_mode = boot_params.hdr.vid_mode; 727 bootloader_type = boot_params.hdr.type_of_loader; 728 if ((bootloader_type >> 4) == 0xe) { 729 bootloader_type &= 0xf; 730 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4; 731 } 732 bootloader_version = bootloader_type & 0xf; 733 bootloader_version |= boot_params.hdr.ext_loader_ver << 4; 734 735#ifdef CONFIG_BLK_DEV_RAM 736 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; 737 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); 738 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); 739#endif 740#ifdef CONFIG_EFI 741 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, 742 "EL32", 4)) { 743 efi_enabled = 1; 744 efi_64bit = false; 745 } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, 746 "EL64", 4)) { 747 efi_enabled = 1; 748 efi_64bit = true; 749 } 750 if (efi_enabled && efi_memblock_x86_reserve_range()) 751 efi_enabled = 0; 752#endif 753 754 x86_init.oem.arch_setup(); 755 756 iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1; 757 setup_memory_map(); 758 parse_setup_data(); 759 /* update the e820_saved too */ 760 e820_reserve_setup_data(); 761 762 copy_edd(); 763 764 if (!boot_params.hdr.root_flags) 765 root_mountflags &= ~MS_RDONLY; 766 init_mm.start_code = (unsigned long) _text; 767 init_mm.end_code = (unsigned long) _etext; 768 init_mm.end_data = (unsigned long) _edata; 769 init_mm.brk = _brk_end; 770 771 code_resource.start = virt_to_phys(_text); 772 code_resource.end = virt_to_phys(_etext)-1; 773 data_resource.start = virt_to_phys(_etext); 774 data_resource.end = virt_to_phys(_edata)-1; 775 bss_resource.start = virt_to_phys(&__bss_start); 776 bss_resource.end = virt_to_phys(&__bss_stop)-1; 777 778#ifdef CONFIG_CMDLINE_BOOL 779#ifdef CONFIG_CMDLINE_OVERRIDE 780 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); 781#else 782 if (builtin_cmdline[0]) { 783 /* append boot loader cmdline to builtin */ 784 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); 785 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); 786 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); 787 } 788#endif 789#endif 790 791 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); 792 *cmdline_p = command_line; 793 794 /* 795 * x86_configure_nx() is called before parse_early_param() to detect 796 * whether hardware doesn't support NX (so that the early EHCI debug 797 * console setup can safely call set_fixmap()). It may then be called 798 * again from within noexec_setup() during parsing early parameters 799 * to honor the respective command line option. 800 */ 801 x86_configure_nx(); 802 803 parse_early_param(); 804 805 x86_report_nx(); 806 807 /* after early param, so could get panic from serial */ 808 memblock_x86_reserve_range_setup_data(); 809 810 if (acpi_mps_check()) { 811#ifdef CONFIG_X86_LOCAL_APIC 812 disable_apic = 1; 813#endif 814 setup_clear_cpu_cap(X86_FEATURE_APIC); 815 } 816 817#ifdef CONFIG_PCI 818 if (pci_early_dump_regs) 819 early_dump_pci_devices(); 820#endif 821 822 finish_e820_parsing(); 823 824 if (efi_enabled) 825 efi_init(); 826 827 dmi_scan_machine(); 828 829 /* 830 * VMware detection requires dmi to be available, so this 831 * needs to be done after dmi_scan_machine, for the BP. 832 */ 833 init_hypervisor_platform(); 834 835 x86_init.resources.probe_roms(); 836 837 /* after parse_early_param, so could debug it */ 838 insert_resource(&iomem_resource, &code_resource); 839 insert_resource(&iomem_resource, &data_resource); 840 insert_resource(&iomem_resource, &bss_resource); 841 842 trim_bios_range(); 843#ifdef CONFIG_X86_32 844 if (ppro_with_ram_bug()) { 845 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, 846 E820_RESERVED); 847 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 848 printk(KERN_INFO "fixed physical RAM map:\n"); 849 e820_print_map("bad_ppro"); 850 } 851#else 852 early_gart_iommu_check(); 853#endif 854 855 /* 856 * partially used pages are not usable - thus 857 * we are rounding upwards: 858 */ 859 max_pfn = e820_end_of_ram_pfn(); 860 861 /* update e820 for memory not covered by WB MTRRs */ 862 mtrr_bp_init(); 863 if (mtrr_trim_uncached_memory(max_pfn)) 864 max_pfn = e820_end_of_ram_pfn(); 865 866#ifdef CONFIG_X86_32 867 /* max_low_pfn get updated here */ 868 find_low_pfn_range(); 869#else 870 num_physpages = max_pfn; 871 872 check_x2apic(); 873 874 /* How many end-of-memory variables you have, grandma! */ 875 /* need this before calling reserve_initrd */ 876 if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) 877 max_low_pfn = e820_end_of_low_ram_pfn(); 878 else 879 max_low_pfn = max_pfn; 880 881 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; 882#endif 883 884 /* 885 * Find and reserve possible boot-time SMP configuration: 886 */ 887 find_smp_config(); 888 889 reserve_ibft_region(); 890 891 /* 892 * Need to conclude brk, before memblock_x86_fill() 893 * it could use memblock_find_in_range, could overlap with 894 * brk area. 895 */ 896 reserve_brk(); 897 898 cleanup_highmap(); 899 900 memblock.current_limit = get_max_mapped(); 901 memblock_x86_fill(); 902 903 /* 904 * The EFI specification says that boot service code won't be called 905 * after ExitBootServices(). This is, in fact, a lie. 906 */ 907 if (efi_enabled) 908 efi_reserve_boot_services(); 909 910 /* preallocate 4k for mptable mpc */ 911 early_reserve_e820_mpc_new(); 912 913#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION 914 setup_bios_corruption_check(); 915#endif 916 917 printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n", 918 max_pfn_mapped<<PAGE_SHIFT); 919 920 setup_trampolines(); 921 922 init_gbpages(); 923 924 /* max_pfn_mapped is updated here */ 925 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); 926 max_pfn_mapped = max_low_pfn_mapped; 927 928#ifdef CONFIG_X86_64 929 if (max_pfn > max_low_pfn) { 930 max_pfn_mapped = init_memory_mapping(1UL<<32, 931 max_pfn<<PAGE_SHIFT); 932 /* can we preseve max_low_pfn ?*/ 933 max_low_pfn = max_pfn; 934 } 935#endif 936 memblock.current_limit = get_max_mapped(); 937 938 /* 939 * NOTE: On x86-32, only from this point on, fixmaps are ready for use. 940 */ 941 942#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT 943 if (init_ohci1394_dma_early) 944 init_ohci1394_dma_on_all_controllers(); 945#endif 946 /* Allocate bigger log buffer */ 947 setup_log_buf(1); 948 949 reserve_initrd(); 950 951 reserve_crashkernel(); 952 953 vsmp_init(); 954 955 io_delay_init(); 956 957 /* 958 * Parse the ACPI tables for possible boot-time SMP configuration. 959 */ 960 acpi_boot_table_init(); 961 962 early_acpi_boot_init(); 963 964 initmem_init(); 965 memblock_find_dma_reserve(); 966 967#ifdef CONFIG_KVM_CLOCK 968 kvmclock_init(); 969#endif 970 971 x86_init.paging.pagetable_setup_start(swapper_pg_dir); 972 paging_init(); 973 x86_init.paging.pagetable_setup_done(swapper_pg_dir); 974 975 if (boot_cpu_data.cpuid_level >= 0) { 976 /* A CPU has %cr4 if and only if it has CPUID */ 977 mmu_cr4_features = read_cr4(); 978 } 979 980#ifdef CONFIG_X86_32 981 /* sync back kernel address range */ 982 clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY, 983 swapper_pg_dir + KERNEL_PGD_BOUNDARY, 984 KERNEL_PGD_PTRS); 985#endif 986 987 tboot_probe(); 988 989#ifdef CONFIG_X86_64 990 map_vsyscall(); 991#endif 992 993 generic_apic_probe(); 994 995 early_quirks(); 996 997 /* 998 * Read APIC and some other early information from ACPI tables. 999 */ 1000 acpi_boot_init(); 1001 sfi_init(); 1002 x86_dtb_init(); 1003 1004 /* 1005 * get boot-time SMP configuration: 1006 */ 1007 if (smp_found_config) 1008 get_smp_config(); 1009 1010 prefill_possible_map(); 1011 1012 init_cpu_to_node(); 1013 1014 init_apic_mappings(); 1015 ioapic_and_gsi_init(); 1016 1017 kvm_guest_init(); 1018 1019 e820_reserve_resources(); 1020 e820_mark_nosave_regions(max_low_pfn); 1021 1022 x86_init.resources.reserve_resources(); 1023 1024 e820_setup_gap(); 1025 1026#ifdef CONFIG_VT 1027#if defined(CONFIG_VGA_CONSOLE) 1028 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) 1029 conswitchp = &vga_con; 1030#elif defined(CONFIG_DUMMY_CONSOLE) 1031 conswitchp = &dummy_con; 1032#endif 1033#endif 1034 x86_init.oem.banner(); 1035 1036 x86_init.timers.wallclock_init(); 1037 1038 x86_platform.wallclock_init(); 1039 1040 mcheck_init(); 1041 1042 arch_init_ideal_nops(); 1043} 1044 1045#ifdef CONFIG_X86_32 1046 1047static struct resource video_ram_resource = { 1048 .name = "Video RAM area", 1049 .start = 0xa0000, 1050 .end = 0xbffff, 1051 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 1052}; 1053 1054void __init i386_reserve_resources(void) 1055{ 1056 request_resource(&iomem_resource, &video_ram_resource); 1057 reserve_standard_io_resources(); 1058} 1059 1060#endif /* CONFIG_X86_32 */ 1061