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/system.h> 94 #include <asm/vsyscall.h> 95 #include <asm/cpu.h> 96 #include <asm/desc.h> 97 #include <asm/dma.h> 98 #include <asm/iommu.h> 99 #include <asm/gart.h> 100 #include <asm/mmu_context.h> 101 #include <asm/proto.h> 102 103 #include <asm/paravirt.h> 104 #include <asm/hypervisor.h> 105 #include <asm/olpc_ofw.h> 106 107 #include <asm/percpu.h> 108 #include <asm/topology.h> 109 #include <asm/apicdef.h> 110 #include <asm/amd_nb.h> 111 #ifdef CONFIG_X86_64 112 #include <asm/numa_64.h> 113 #endif 114 #include <asm/mce.h> 115 #include <asm/alternative.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 */ 122 unsigned long max_low_pfn_mapped; 123 unsigned long max_pfn_mapped; 124 125 #ifdef CONFIG_DMI 126 RESERVE_BRK(dmi_alloc, 65536); 127 #endif 128 129 130 static __initdata unsigned long _brk_start = (unsigned long)__brk_base; 131 unsigned long _brk_end = (unsigned long)__brk_base; 132 133 #ifdef CONFIG_X86_64 134 int default_cpu_present_to_apicid(int mps_cpu) 135 { 136 return __default_cpu_present_to_apicid(mps_cpu); 137 } 138 139 int 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 146 struct boot_params __initdata boot_params; 147 #else 148 struct boot_params boot_params; 149 #endif 150 151 /* 152 * Machine setup.. 153 */ 154 static struct resource data_resource = { 155 .name = "Kernel data", 156 .start = 0, 157 .end = 0, 158 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 159 }; 160 161 static struct resource code_resource = { 162 .name = "Kernel code", 163 .start = 0, 164 .end = 0, 165 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 166 }; 167 168 static 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 */ 178 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; 179 /* common cpu data for all cpus */ 180 struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; 181 EXPORT_SYMBOL(boot_cpu_data); 182 static void set_mca_bus(int x) 183 { 184 #ifdef CONFIG_MCA 185 MCA_bus = x; 186 #endif 187 } 188 189 unsigned int def_to_bigsmp; 190 191 /* for MCA, but anyone else can use it if they want */ 192 unsigned int machine_id; 193 unsigned int machine_submodel_id; 194 unsigned int BIOS_revision; 195 196 struct apm_info apm_info; 197 EXPORT_SYMBOL(apm_info); 198 199 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ 200 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) 201 struct ist_info ist_info; 202 EXPORT_SYMBOL(ist_info); 203 #else 204 struct ist_info ist_info; 205 #endif 206 207 #else 208 struct cpuinfo_x86 boot_cpu_data __read_mostly = { 209 .x86_phys_bits = MAX_PHYSMEM_BITS, 210 }; 211 EXPORT_SYMBOL(boot_cpu_data); 212 #endif 213 214 215 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) 216 unsigned long mmu_cr4_features; 217 #else 218 unsigned long mmu_cr4_features = X86_CR4_PAE; 219 #endif 220 221 /* Boot loader ID and version as integers, for the benefit of proc_dointvec */ 222 int bootloader_type, bootloader_version; 223 224 /* 225 * Setup options 226 */ 227 struct screen_info screen_info; 228 EXPORT_SYMBOL(screen_info); 229 struct edid_info edid_info; 230 EXPORT_SYMBOL_GPL(edid_info); 231 232 extern int root_mountflags; 233 234 unsigned long saved_video_mode; 235 236 #define RAMDISK_IMAGE_START_MASK 0x07FF 237 #define RAMDISK_PROMPT_FLAG 0x8000 238 #define RAMDISK_LOAD_FLAG 0x4000 239 240 static char __initdata command_line[COMMAND_LINE_SIZE]; 241 #ifdef CONFIG_CMDLINE_BOOL 242 static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; 243 #endif 244 245 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) 246 struct edd edd; 247 #ifdef CONFIG_EDD_MODULE 248 EXPORT_SYMBOL(edd); 249 #endif 250 /** 251 * copy_edd() - Copy the BIOS EDD information 252 * from boot_params into a safe place. 253 * 254 */ 255 static 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 264 static inline void __init copy_edd(void) 265 { 266 } 267 #endif 268 269 void * __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_64 289 static 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 297 static inline void init_gbpages(void) 298 { 299 } 300 #endif 301 302 static void __init reserve_brk(void) 303 { 304 if (_brk_end > _brk_start) 305 memblock_x86_reserve_range(__pa(_brk_start), __pa(_brk_end), "BRK"); 306 307 /* Mark brk area as locked down and no longer taking any 308 new allocations */ 309 _brk_start = 0; 310 } 311 312 #ifdef CONFIG_BLK_DEV_INITRD 313 314 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) 315 static void __init relocate_initrd(void) 316 { 317 /* Assume only end is not page aligned */ 318 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 319 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 320 u64 area_size = PAGE_ALIGN(ramdisk_size); 321 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; 322 u64 ramdisk_here; 323 unsigned long slop, clen, mapaddr; 324 char *p, *q; 325 326 /* We need to move the initrd down into lowmem */ 327 ramdisk_here = memblock_find_in_range(0, end_of_lowmem, area_size, 328 PAGE_SIZE); 329 330 if (ramdisk_here == MEMBLOCK_ERROR) 331 panic("Cannot find place for new RAMDISK of size %lld\n", 332 ramdisk_size); 333 334 /* Note: this includes all the lowmem currently occupied by 335 the initrd, we rely on that fact to keep the data intact. */ 336 memblock_x86_reserve_range(ramdisk_here, ramdisk_here + area_size, "NEW RAMDISK"); 337 initrd_start = ramdisk_here + PAGE_OFFSET; 338 initrd_end = initrd_start + ramdisk_size; 339 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", 340 ramdisk_here, ramdisk_here + ramdisk_size); 341 342 q = (char *)initrd_start; 343 344 /* Copy any lowmem portion of the initrd */ 345 if (ramdisk_image < end_of_lowmem) { 346 clen = end_of_lowmem - ramdisk_image; 347 p = (char *)__va(ramdisk_image); 348 memcpy(q, p, clen); 349 q += clen; 350 ramdisk_image += clen; 351 ramdisk_size -= clen; 352 } 353 354 /* Copy the highmem portion of the initrd */ 355 while (ramdisk_size) { 356 slop = ramdisk_image & ~PAGE_MASK; 357 clen = ramdisk_size; 358 if (clen > MAX_MAP_CHUNK-slop) 359 clen = MAX_MAP_CHUNK-slop; 360 mapaddr = ramdisk_image & PAGE_MASK; 361 p = early_memremap(mapaddr, clen+slop); 362 memcpy(q, p+slop, clen); 363 early_iounmap(p, clen+slop); 364 q += clen; 365 ramdisk_image += clen; 366 ramdisk_size -= clen; 367 } 368 /* high pages is not converted by early_res_to_bootmem */ 369 ramdisk_image = boot_params.hdr.ramdisk_image; 370 ramdisk_size = boot_params.hdr.ramdisk_size; 371 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" 372 " %08llx - %08llx\n", 373 ramdisk_image, ramdisk_image + ramdisk_size - 1, 374 ramdisk_here, ramdisk_here + ramdisk_size - 1); 375 } 376 377 static void __init reserve_initrd(void) 378 { 379 /* Assume only end is not page aligned */ 380 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 381 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 382 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); 383 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; 384 385 if (!boot_params.hdr.type_of_loader || 386 !ramdisk_image || !ramdisk_size) 387 return; /* No initrd provided by bootloader */ 388 389 initrd_start = 0; 390 391 if (ramdisk_size >= (end_of_lowmem>>1)) { 392 memblock_x86_free_range(ramdisk_image, ramdisk_end); 393 printk(KERN_ERR "initrd too large to handle, " 394 "disabling initrd\n"); 395 return; 396 } 397 398 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, 399 ramdisk_end); 400 401 402 if (ramdisk_end <= end_of_lowmem) { 403 /* All in lowmem, easy case */ 404 /* 405 * don't need to reserve again, already reserved early 406 * in i386_start_kernel 407 */ 408 initrd_start = ramdisk_image + PAGE_OFFSET; 409 initrd_end = initrd_start + ramdisk_size; 410 return; 411 } 412 413 relocate_initrd(); 414 415 memblock_x86_free_range(ramdisk_image, ramdisk_end); 416 } 417 #else 418 static void __init reserve_initrd(void) 419 { 420 } 421 #endif /* CONFIG_BLK_DEV_INITRD */ 422 423 static void __init parse_setup_data(void) 424 { 425 struct setup_data *data; 426 u64 pa_data; 427 428 if (boot_params.hdr.version < 0x0209) 429 return; 430 pa_data = boot_params.hdr.setup_data; 431 while (pa_data) { 432 data = early_memremap(pa_data, PAGE_SIZE); 433 switch (data->type) { 434 case SETUP_E820_EXT: 435 parse_e820_ext(data, pa_data); 436 break; 437 default: 438 break; 439 } 440 pa_data = data->next; 441 early_iounmap(data, PAGE_SIZE); 442 } 443 } 444 445 static void __init e820_reserve_setup_data(void) 446 { 447 struct setup_data *data; 448 u64 pa_data; 449 int found = 0; 450 451 if (boot_params.hdr.version < 0x0209) 452 return; 453 pa_data = boot_params.hdr.setup_data; 454 while (pa_data) { 455 data = early_memremap(pa_data, sizeof(*data)); 456 e820_update_range(pa_data, sizeof(*data)+data->len, 457 E820_RAM, E820_RESERVED_KERN); 458 found = 1; 459 pa_data = data->next; 460 early_iounmap(data, sizeof(*data)); 461 } 462 if (!found) 463 return; 464 465 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 466 memcpy(&e820_saved, &e820, sizeof(struct e820map)); 467 printk(KERN_INFO "extended physical RAM map:\n"); 468 e820_print_map("reserve setup_data"); 469 } 470 471 static void __init memblock_x86_reserve_range_setup_data(void) 472 { 473 struct setup_data *data; 474 u64 pa_data; 475 char buf[32]; 476 477 if (boot_params.hdr.version < 0x0209) 478 return; 479 pa_data = boot_params.hdr.setup_data; 480 while (pa_data) { 481 data = early_memremap(pa_data, sizeof(*data)); 482 sprintf(buf, "setup data %x", data->type); 483 memblock_x86_reserve_range(pa_data, pa_data+sizeof(*data)+data->len, buf); 484 pa_data = data->next; 485 early_iounmap(data, sizeof(*data)); 486 } 487 } 488 489 /* 490 * --------- Crashkernel reservation ------------------------------ 491 */ 492 493 #ifdef CONFIG_KEXEC 494 495 static inline unsigned long long get_total_mem(void) 496 { 497 unsigned long long total; 498 499 total = max_pfn - min_low_pfn; 500 501 return total << PAGE_SHIFT; 502 } 503 504 #define DEFAULT_BZIMAGE_ADDR_MAX 0x37FFFFFF 505 static void __init reserve_crashkernel(void) 506 { 507 unsigned long long total_mem; 508 unsigned long long crash_size, crash_base; 509 int ret; 510 511 total_mem = get_total_mem(); 512 513 ret = parse_crashkernel(boot_command_line, total_mem, 514 &crash_size, &crash_base); 515 if (ret != 0 || crash_size <= 0) 516 return; 517 518 /* 0 means: find the address automatically */ 519 if (crash_base <= 0) { 520 const unsigned long long alignment = 16<<20; /* 16M */ 521 522 /* 523 * kexec want bzImage is below DEFAULT_BZIMAGE_ADDR_MAX 524 */ 525 crash_base = memblock_find_in_range(alignment, 526 DEFAULT_BZIMAGE_ADDR_MAX, crash_size, alignment); 527 528 if (crash_base == MEMBLOCK_ERROR) { 529 pr_info("crashkernel reservation failed - No suitable area found.\n"); 530 return; 531 } 532 } else { 533 unsigned long long start; 534 535 start = memblock_find_in_range(crash_base, 536 crash_base + crash_size, crash_size, 1<<20); 537 if (start != crash_base) { 538 pr_info("crashkernel reservation failed - memory is in use.\n"); 539 return; 540 } 541 } 542 memblock_x86_reserve_range(crash_base, crash_base + crash_size, "CRASH KERNEL"); 543 544 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " 545 "for crashkernel (System RAM: %ldMB)\n", 546 (unsigned long)(crash_size >> 20), 547 (unsigned long)(crash_base >> 20), 548 (unsigned long)(total_mem >> 20)); 549 550 crashk_res.start = crash_base; 551 crashk_res.end = crash_base + crash_size - 1; 552 insert_resource(&iomem_resource, &crashk_res); 553 } 554 #else 555 static void __init reserve_crashkernel(void) 556 { 557 } 558 #endif 559 560 static struct resource standard_io_resources[] = { 561 { .name = "dma1", .start = 0x00, .end = 0x1f, 562 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 563 { .name = "pic1", .start = 0x20, .end = 0x21, 564 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 565 { .name = "timer0", .start = 0x40, .end = 0x43, 566 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 567 { .name = "timer1", .start = 0x50, .end = 0x53, 568 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 569 { .name = "keyboard", .start = 0x60, .end = 0x60, 570 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 571 { .name = "keyboard", .start = 0x64, .end = 0x64, 572 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 573 { .name = "dma page reg", .start = 0x80, .end = 0x8f, 574 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 575 { .name = "pic2", .start = 0xa0, .end = 0xa1, 576 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 577 { .name = "dma2", .start = 0xc0, .end = 0xdf, 578 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 579 { .name = "fpu", .start = 0xf0, .end = 0xff, 580 .flags = IORESOURCE_BUSY | IORESOURCE_IO } 581 }; 582 583 void __init reserve_standard_io_resources(void) 584 { 585 int i; 586 587 /* request I/O space for devices used on all i[345]86 PCs */ 588 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) 589 request_resource(&ioport_resource, &standard_io_resources[i]); 590 591 } 592 593 /* 594 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by 595 * is_kdump_kernel() to determine if we are booting after a panic. Hence 596 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE. 597 */ 598 599 #ifdef CONFIG_CRASH_DUMP 600 /* elfcorehdr= specifies the location of elf core header 601 * stored by the crashed kernel. This option will be passed 602 * by kexec loader to the capture kernel. 603 */ 604 static int __init setup_elfcorehdr(char *arg) 605 { 606 char *end; 607 if (!arg) 608 return -EINVAL; 609 elfcorehdr_addr = memparse(arg, &end); 610 return end > arg ? 0 : -EINVAL; 611 } 612 early_param("elfcorehdr", setup_elfcorehdr); 613 #endif 614 615 static __init void reserve_ibft_region(void) 616 { 617 unsigned long addr, size = 0; 618 619 addr = find_ibft_region(&size); 620 621 if (size) 622 memblock_x86_reserve_range(addr, addr + size, "* ibft"); 623 } 624 625 static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10; 626 627 static void __init trim_bios_range(void) 628 { 629 /* 630 * A special case is the first 4Kb of memory; 631 * This is a BIOS owned area, not kernel ram, but generally 632 * not listed as such in the E820 table. 633 * 634 * This typically reserves additional memory (64KiB by default) 635 * since some BIOSes are known to corrupt low memory. See the 636 * Kconfig help text for X86_RESERVE_LOW. 637 */ 638 e820_update_range(0, ALIGN(reserve_low, PAGE_SIZE), 639 E820_RAM, E820_RESERVED); 640 641 /* 642 * special case: Some BIOSen report the PC BIOS 643 * area (640->1Mb) as ram even though it is not. 644 * take them out. 645 */ 646 e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1); 647 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 648 } 649 650 static int __init parse_reservelow(char *p) 651 { 652 unsigned long long size; 653 654 if (!p) 655 return -EINVAL; 656 657 size = memparse(p, &p); 658 659 if (size < 4096) 660 size = 4096; 661 662 if (size > 640*1024) 663 size = 640*1024; 664 665 reserve_low = size; 666 667 return 0; 668 } 669 670 early_param("reservelow", parse_reservelow); 671 672 static u64 __init get_max_mapped(void) 673 { 674 u64 end = max_pfn_mapped; 675 676 end <<= PAGE_SHIFT; 677 678 return end; 679 } 680 681 /* 682 * Determine if we were loaded by an EFI loader. If so, then we have also been 683 * passed the efi memmap, systab, etc., so we should use these data structures 684 * for initialization. Note, the efi init code path is determined by the 685 * global efi_enabled. This allows the same kernel image to be used on existing 686 * systems (with a traditional BIOS) as well as on EFI systems. 687 */ 688 /* 689 * setup_arch - architecture-specific boot-time initializations 690 * 691 * Note: On x86_64, fixmaps are ready for use even before this is called. 692 */ 693 694 void __init setup_arch(char **cmdline_p) 695 { 696 int acpi = 0; 697 int k8 = 0; 698 unsigned long flags; 699 700 #ifdef CONFIG_X86_32 701 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); 702 visws_early_detect(); 703 #else 704 printk(KERN_INFO "Command line: %s\n", boot_command_line); 705 #endif 706 707 /* 708 * If we have OLPC OFW, we might end up relocating the fixmap due to 709 * reserve_top(), so do this before touching the ioremap area. 710 */ 711 olpc_ofw_detect(); 712 713 early_trap_init(); 714 early_cpu_init(); 715 early_ioremap_init(); 716 717 setup_olpc_ofw_pgd(); 718 719 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); 720 screen_info = boot_params.screen_info; 721 edid_info = boot_params.edid_info; 722 #ifdef CONFIG_X86_32 723 apm_info.bios = boot_params.apm_bios_info; 724 ist_info = boot_params.ist_info; 725 if (boot_params.sys_desc_table.length != 0) { 726 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); 727 machine_id = boot_params.sys_desc_table.table[0]; 728 machine_submodel_id = boot_params.sys_desc_table.table[1]; 729 BIOS_revision = boot_params.sys_desc_table.table[2]; 730 } 731 #endif 732 saved_video_mode = boot_params.hdr.vid_mode; 733 bootloader_type = boot_params.hdr.type_of_loader; 734 if ((bootloader_type >> 4) == 0xe) { 735 bootloader_type &= 0xf; 736 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4; 737 } 738 bootloader_version = bootloader_type & 0xf; 739 bootloader_version |= boot_params.hdr.ext_loader_ver << 4; 740 741 #ifdef CONFIG_BLK_DEV_RAM 742 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; 743 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); 744 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); 745 #endif 746 #ifdef CONFIG_EFI 747 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, 748 #ifdef CONFIG_X86_32 749 "EL32", 750 #else 751 "EL64", 752 #endif 753 4)) { 754 efi_enabled = 1; 755 efi_memblock_x86_reserve_range(); 756 } 757 #endif 758 759 x86_init.oem.arch_setup(); 760 761 setup_memory_map(); 762 parse_setup_data(); 763 /* update the e820_saved too */ 764 e820_reserve_setup_data(); 765 766 copy_edd(); 767 768 if (!boot_params.hdr.root_flags) 769 root_mountflags &= ~MS_RDONLY; 770 init_mm.start_code = (unsigned long) _text; 771 init_mm.end_code = (unsigned long) _etext; 772 init_mm.end_data = (unsigned long) _edata; 773 init_mm.brk = _brk_end; 774 775 code_resource.start = virt_to_phys(_text); 776 code_resource.end = virt_to_phys(_etext)-1; 777 data_resource.start = virt_to_phys(_etext); 778 data_resource.end = virt_to_phys(_edata)-1; 779 bss_resource.start = virt_to_phys(&__bss_start); 780 bss_resource.end = virt_to_phys(&__bss_stop)-1; 781 782 #ifdef CONFIG_CMDLINE_BOOL 783 #ifdef CONFIG_CMDLINE_OVERRIDE 784 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); 785 #else 786 if (builtin_cmdline[0]) { 787 /* append boot loader cmdline to builtin */ 788 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); 789 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); 790 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); 791 } 792 #endif 793 #endif 794 795 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); 796 *cmdline_p = command_line; 797 798 /* 799 * x86_configure_nx() is called before parse_early_param() to detect 800 * whether hardware doesn't support NX (so that the early EHCI debug 801 * console setup can safely call set_fixmap()). It may then be called 802 * again from within noexec_setup() during parsing early parameters 803 * to honor the respective command line option. 804 */ 805 x86_configure_nx(); 806 807 parse_early_param(); 808 809 x86_report_nx(); 810 811 /* after early param, so could get panic from serial */ 812 memblock_x86_reserve_range_setup_data(); 813 814 if (acpi_mps_check()) { 815 #ifdef CONFIG_X86_LOCAL_APIC 816 disable_apic = 1; 817 #endif 818 setup_clear_cpu_cap(X86_FEATURE_APIC); 819 } 820 821 #ifdef CONFIG_PCI 822 if (pci_early_dump_regs) 823 early_dump_pci_devices(); 824 #endif 825 826 finish_e820_parsing(); 827 828 if (efi_enabled) 829 efi_init(); 830 831 dmi_scan_machine(); 832 833 /* 834 * VMware detection requires dmi to be available, so this 835 * needs to be done after dmi_scan_machine, for the BP. 836 */ 837 init_hypervisor_platform(); 838 839 x86_init.resources.probe_roms(); 840 841 /* after parse_early_param, so could debug it */ 842 insert_resource(&iomem_resource, &code_resource); 843 insert_resource(&iomem_resource, &data_resource); 844 insert_resource(&iomem_resource, &bss_resource); 845 846 trim_bios_range(); 847 #ifdef CONFIG_X86_32 848 if (ppro_with_ram_bug()) { 849 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, 850 E820_RESERVED); 851 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 852 printk(KERN_INFO "fixed physical RAM map:\n"); 853 e820_print_map("bad_ppro"); 854 } 855 #else 856 early_gart_iommu_check(); 857 #endif 858 859 /* 860 * partially used pages are not usable - thus 861 * we are rounding upwards: 862 */ 863 max_pfn = e820_end_of_ram_pfn(); 864 865 /* update e820 for memory not covered by WB MTRRs */ 866 mtrr_bp_init(); 867 if (mtrr_trim_uncached_memory(max_pfn)) 868 max_pfn = e820_end_of_ram_pfn(); 869 870 #ifdef CONFIG_X86_32 871 /* max_low_pfn get updated here */ 872 find_low_pfn_range(); 873 #else 874 num_physpages = max_pfn; 875 876 check_x2apic(); 877 878 /* How many end-of-memory variables you have, grandma! */ 879 /* need this before calling reserve_initrd */ 880 if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) 881 max_low_pfn = e820_end_of_low_ram_pfn(); 882 else 883 max_low_pfn = max_pfn; 884 885 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; 886 #endif 887 888 /* 889 * Find and reserve possible boot-time SMP configuration: 890 */ 891 find_smp_config(); 892 893 reserve_ibft_region(); 894 895 /* 896 * Need to conclude brk, before memblock_x86_fill() 897 * it could use memblock_find_in_range, could overlap with 898 * brk area. 899 */ 900 reserve_brk(); 901 902 memblock.current_limit = get_max_mapped(); 903 memblock_x86_fill(); 904 905 /* preallocate 4k for mptable mpc */ 906 early_reserve_e820_mpc_new(); 907 908 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION 909 setup_bios_corruption_check(); 910 #endif 911 912 printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n", 913 max_pfn_mapped<<PAGE_SHIFT); 914 915 reserve_trampoline_memory(); 916 917 #ifdef CONFIG_ACPI_SLEEP 918 /* 919 * Reserve low memory region for sleep support. 920 * even before init_memory_mapping 921 */ 922 acpi_reserve_wakeup_memory(); 923 #endif 924 init_gbpages(); 925 926 /* max_pfn_mapped is updated here */ 927 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); 928 max_pfn_mapped = max_low_pfn_mapped; 929 930 #ifdef CONFIG_X86_64 931 if (max_pfn > max_low_pfn) { 932 max_pfn_mapped = init_memory_mapping(1UL<<32, 933 max_pfn<<PAGE_SHIFT); 934 /* can we preseve max_low_pfn ?*/ 935 max_low_pfn = max_pfn; 936 } 937 #endif 938 memblock.current_limit = get_max_mapped(); 939 940 /* 941 * NOTE: On x86-32, only from this point on, fixmaps are ready for use. 942 */ 943 944 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT 945 if (init_ohci1394_dma_early) 946 init_ohci1394_dma_on_all_controllers(); 947 #endif 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 #ifdef CONFIG_ACPI_NUMA 965 /* 966 * Parse SRAT to discover nodes. 967 */ 968 acpi = acpi_numa_init(); 969 #endif 970 971 #ifdef CONFIG_K8_NUMA 972 if (!acpi) 973 k8 = !k8_numa_init(0, max_pfn); 974 #endif 975 976 initmem_init(0, max_pfn, acpi, k8); 977 memblock_find_dma_reserve(); 978 dma32_reserve_bootmem(); 979 980 #ifdef CONFIG_KVM_CLOCK 981 kvmclock_init(); 982 #endif 983 984 x86_init.paging.pagetable_setup_start(swapper_pg_dir); 985 paging_init(); 986 x86_init.paging.pagetable_setup_done(swapper_pg_dir); 987 988 setup_trampoline_page_table(); 989 990 tboot_probe(); 991 992 #ifdef CONFIG_X86_64 993 map_vsyscall(); 994 #endif 995 996 generic_apic_probe(); 997 998 early_quirks(); 999 1000 /* 1001 * Read APIC and some other early information from ACPI tables. 1002 */ 1003 acpi_boot_init(); 1004 1005 sfi_init(); 1006 1007 /* 1008 * get boot-time SMP configuration: 1009 */ 1010 if (smp_found_config) 1011 get_smp_config(); 1012 1013 prefill_possible_map(); 1014 1015 #ifdef CONFIG_X86_64 1016 init_cpu_to_node(); 1017 #endif 1018 1019 init_apic_mappings(); 1020 ioapic_init_mappings(); 1021 1022 /* need to wait for io_apic is mapped */ 1023 probe_nr_irqs_gsi(); 1024 1025 kvm_guest_init(); 1026 1027 e820_reserve_resources(); 1028 e820_mark_nosave_regions(max_low_pfn); 1029 1030 x86_init.resources.reserve_resources(); 1031 1032 e820_setup_gap(); 1033 1034 #ifdef CONFIG_VT 1035 #if defined(CONFIG_VGA_CONSOLE) 1036 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) 1037 conswitchp = &vga_con; 1038 #elif defined(CONFIG_DUMMY_CONSOLE) 1039 conswitchp = &dummy_con; 1040 #endif 1041 #endif 1042 x86_init.oem.banner(); 1043 1044 mcheck_init(); 1045 1046 local_irq_save(flags); 1047 arch_init_ideal_nop5(); 1048 local_irq_restore(flags); 1049 } 1050 1051 #ifdef CONFIG_X86_32 1052 1053 static struct resource video_ram_resource = { 1054 .name = "Video RAM area", 1055 .start = 0xa0000, 1056 .end = 0xbffff, 1057 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 1058 }; 1059 1060 void __init i386_reserve_resources(void) 1061 { 1062 request_resource(&iomem_resource, &video_ram_resource); 1063 reserve_standard_io_resources(); 1064 } 1065 1066 #endif /* CONFIG_X86_32 */ 1067