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/dmi.h> 46 #include <linux/pfn.h> 47 #include <linux/pci.h> 48 #include <asm/pci-direct.h> 49 #include <linux/init_ohci1394_dma.h> 50 #include <linux/kvm_para.h> 51 52 #include <linux/errno.h> 53 #include <linux/kernel.h> 54 #include <linux/stddef.h> 55 #include <linux/unistd.h> 56 #include <linux/ptrace.h> 57 #include <linux/slab.h> 58 #include <linux/user.h> 59 #include <linux/delay.h> 60 61 #include <linux/kallsyms.h> 62 #include <linux/cpufreq.h> 63 #include <linux/dma-mapping.h> 64 #include <linux/ctype.h> 65 #include <linux/uaccess.h> 66 67 #include <linux/percpu.h> 68 #include <linux/crash_dump.h> 69 #include <linux/tboot.h> 70 71 #include <video/edid.h> 72 73 #include <asm/mtrr.h> 74 #include <asm/apic.h> 75 #include <asm/e820.h> 76 #include <asm/mpspec.h> 77 #include <asm/setup.h> 78 #include <asm/efi.h> 79 #include <asm/timer.h> 80 #include <asm/i8259.h> 81 #include <asm/sections.h> 82 #include <asm/dmi.h> 83 #include <asm/io_apic.h> 84 #include <asm/ist.h> 85 #include <asm/vmi.h> 86 #include <asm/setup_arch.h> 87 #include <asm/bios_ebda.h> 88 #include <asm/cacheflush.h> 89 #include <asm/processor.h> 90 #include <asm/bugs.h> 91 92 #include <asm/system.h> 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> 104 105 #include <asm/percpu.h> 106 #include <asm/topology.h> 107 #include <asm/apicdef.h> 108 #ifdef CONFIG_X86_64 109 #include <asm/numa_64.h> 110 #endif 111 112 /* 113 * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries. 114 * The direct mapping extends to max_pfn_mapped, so that we can directly access 115 * apertures, ACPI and other tables without having to play with fixmaps. 116 */ 117 unsigned long max_low_pfn_mapped; 118 unsigned long max_pfn_mapped; 119 120 RESERVE_BRK(dmi_alloc, 65536); 121 122 unsigned int boot_cpu_id __read_mostly; 123 124 static __initdata unsigned long _brk_start = (unsigned long)__brk_base; 125 unsigned long _brk_end = (unsigned long)__brk_base; 126 127 #ifdef CONFIG_X86_64 128 int default_cpu_present_to_apicid(int mps_cpu) 129 { 130 return __default_cpu_present_to_apicid(mps_cpu); 131 } 132 133 int default_check_phys_apicid_present(int phys_apicid) 134 { 135 return __default_check_phys_apicid_present(phys_apicid); 136 } 137 #endif 138 139 #ifndef CONFIG_DEBUG_BOOT_PARAMS 140 struct boot_params __initdata boot_params; 141 #else 142 struct boot_params boot_params; 143 #endif 144 145 /* 146 * Machine setup.. 147 */ 148 static struct resource data_resource = { 149 .name = "Kernel data", 150 .start = 0, 151 .end = 0, 152 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 153 }; 154 155 static struct resource code_resource = { 156 .name = "Kernel code", 157 .start = 0, 158 .end = 0, 159 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 160 }; 161 162 static struct resource bss_resource = { 163 .name = "Kernel bss", 164 .start = 0, 165 .end = 0, 166 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 167 }; 168 169 170 #ifdef CONFIG_X86_32 171 /* cpu data as detected by the assembly code in head.S */ 172 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; 173 /* common cpu data for all cpus */ 174 struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; 175 EXPORT_SYMBOL(boot_cpu_data); 176 static void set_mca_bus(int x) 177 { 178 #ifdef CONFIG_MCA 179 MCA_bus = x; 180 #endif 181 } 182 183 unsigned int def_to_bigsmp; 184 185 /* for MCA, but anyone else can use it if they want */ 186 unsigned int machine_id; 187 unsigned int machine_submodel_id; 188 unsigned int BIOS_revision; 189 190 struct apm_info apm_info; 191 EXPORT_SYMBOL(apm_info); 192 193 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ 194 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) 195 struct ist_info ist_info; 196 EXPORT_SYMBOL(ist_info); 197 #else 198 struct ist_info ist_info; 199 #endif 200 201 #else 202 struct cpuinfo_x86 boot_cpu_data __read_mostly = { 203 .x86_phys_bits = MAX_PHYSMEM_BITS, 204 }; 205 EXPORT_SYMBOL(boot_cpu_data); 206 #endif 207 208 209 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) 210 unsigned long mmu_cr4_features; 211 #else 212 unsigned long mmu_cr4_features = X86_CR4_PAE; 213 #endif 214 215 /* Boot loader ID and version as integers, for the benefit of proc_dointvec */ 216 int bootloader_type, bootloader_version; 217 218 /* 219 * Setup options 220 */ 221 struct screen_info screen_info; 222 EXPORT_SYMBOL(screen_info); 223 struct edid_info edid_info; 224 EXPORT_SYMBOL_GPL(edid_info); 225 226 extern int root_mountflags; 227 228 unsigned long saved_video_mode; 229 230 #define RAMDISK_IMAGE_START_MASK 0x07FF 231 #define RAMDISK_PROMPT_FLAG 0x8000 232 #define RAMDISK_LOAD_FLAG 0x4000 233 234 static char __initdata command_line[COMMAND_LINE_SIZE]; 235 #ifdef CONFIG_CMDLINE_BOOL 236 static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; 237 #endif 238 239 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) 240 struct edd edd; 241 #ifdef CONFIG_EDD_MODULE 242 EXPORT_SYMBOL(edd); 243 #endif 244 /** 245 * copy_edd() - Copy the BIOS EDD information 246 * from boot_params into a safe place. 247 * 248 */ 249 static inline void copy_edd(void) 250 { 251 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, 252 sizeof(edd.mbr_signature)); 253 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); 254 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; 255 edd.edd_info_nr = boot_params.eddbuf_entries; 256 } 257 #else 258 static inline void copy_edd(void) 259 { 260 } 261 #endif 262 263 void * __init extend_brk(size_t size, size_t align) 264 { 265 size_t mask = align - 1; 266 void *ret; 267 268 BUG_ON(_brk_start == 0); 269 BUG_ON(align & mask); 270 271 _brk_end = (_brk_end + mask) & ~mask; 272 BUG_ON((char *)(_brk_end + size) > __brk_limit); 273 274 ret = (void *)_brk_end; 275 _brk_end += size; 276 277 memset(ret, 0, size); 278 279 return ret; 280 } 281 282 #ifdef CONFIG_X86_64 283 static void __init init_gbpages(void) 284 { 285 if (direct_gbpages && cpu_has_gbpages) 286 printk(KERN_INFO "Using GB pages for direct mapping\n"); 287 else 288 direct_gbpages = 0; 289 } 290 #else 291 static inline void init_gbpages(void) 292 { 293 } 294 #endif 295 296 static void __init reserve_brk(void) 297 { 298 if (_brk_end > _brk_start) 299 reserve_early(__pa(_brk_start), __pa(_brk_end), "BRK"); 300 301 /* Mark brk area as locked down and no longer taking any 302 new allocations */ 303 _brk_start = 0; 304 } 305 306 #ifdef CONFIG_BLK_DEV_INITRD 307 308 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) 309 static void __init relocate_initrd(void) 310 { 311 312 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 313 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 314 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; 315 u64 ramdisk_here; 316 unsigned long slop, clen, mapaddr; 317 char *p, *q; 318 319 /* We need to move the initrd down into lowmem */ 320 ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size, 321 PAGE_SIZE); 322 323 if (ramdisk_here == -1ULL) 324 panic("Cannot find place for new RAMDISK of size %lld\n", 325 ramdisk_size); 326 327 /* Note: this includes all the lowmem currently occupied by 328 the initrd, we rely on that fact to keep the data intact. */ 329 reserve_early(ramdisk_here, ramdisk_here + ramdisk_size, 330 "NEW RAMDISK"); 331 initrd_start = ramdisk_here + PAGE_OFFSET; 332 initrd_end = initrd_start + ramdisk_size; 333 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", 334 ramdisk_here, ramdisk_here + ramdisk_size); 335 336 q = (char *)initrd_start; 337 338 /* Copy any lowmem portion of the initrd */ 339 if (ramdisk_image < end_of_lowmem) { 340 clen = end_of_lowmem - ramdisk_image; 341 p = (char *)__va(ramdisk_image); 342 memcpy(q, p, clen); 343 q += clen; 344 ramdisk_image += clen; 345 ramdisk_size -= clen; 346 } 347 348 /* Copy the highmem portion of the initrd */ 349 while (ramdisk_size) { 350 slop = ramdisk_image & ~PAGE_MASK; 351 clen = ramdisk_size; 352 if (clen > MAX_MAP_CHUNK-slop) 353 clen = MAX_MAP_CHUNK-slop; 354 mapaddr = ramdisk_image & PAGE_MASK; 355 p = early_memremap(mapaddr, clen+slop); 356 memcpy(q, p+slop, clen); 357 early_iounmap(p, clen+slop); 358 q += clen; 359 ramdisk_image += clen; 360 ramdisk_size -= clen; 361 } 362 /* high pages is not converted by early_res_to_bootmem */ 363 ramdisk_image = boot_params.hdr.ramdisk_image; 364 ramdisk_size = boot_params.hdr.ramdisk_size; 365 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" 366 " %08llx - %08llx\n", 367 ramdisk_image, ramdisk_image + ramdisk_size - 1, 368 ramdisk_here, ramdisk_here + ramdisk_size - 1); 369 } 370 371 static void __init reserve_initrd(void) 372 { 373 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 374 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 375 u64 ramdisk_end = ramdisk_image + ramdisk_size; 376 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; 377 378 if (!boot_params.hdr.type_of_loader || 379 !ramdisk_image || !ramdisk_size) 380 return; /* No initrd provided by bootloader */ 381 382 initrd_start = 0; 383 384 if (ramdisk_size >= (end_of_lowmem>>1)) { 385 free_early(ramdisk_image, ramdisk_end); 386 printk(KERN_ERR "initrd too large to handle, " 387 "disabling initrd\n"); 388 return; 389 } 390 391 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, 392 ramdisk_end); 393 394 395 if (ramdisk_end <= end_of_lowmem) { 396 /* All in lowmem, easy case */ 397 /* 398 * don't need to reserve again, already reserved early 399 * in i386_start_kernel 400 */ 401 initrd_start = ramdisk_image + PAGE_OFFSET; 402 initrd_end = initrd_start + ramdisk_size; 403 return; 404 } 405 406 relocate_initrd(); 407 408 free_early(ramdisk_image, ramdisk_end); 409 } 410 #else 411 static void __init reserve_initrd(void) 412 { 413 } 414 #endif /* CONFIG_BLK_DEV_INITRD */ 415 416 static void __init parse_setup_data(void) 417 { 418 struct setup_data *data; 419 u64 pa_data; 420 421 if (boot_params.hdr.version < 0x0209) 422 return; 423 pa_data = boot_params.hdr.setup_data; 424 while (pa_data) { 425 data = early_memremap(pa_data, PAGE_SIZE); 426 switch (data->type) { 427 case SETUP_E820_EXT: 428 parse_e820_ext(data, pa_data); 429 break; 430 default: 431 break; 432 } 433 pa_data = data->next; 434 early_iounmap(data, PAGE_SIZE); 435 } 436 } 437 438 static void __init e820_reserve_setup_data(void) 439 { 440 struct setup_data *data; 441 u64 pa_data; 442 int found = 0; 443 444 if (boot_params.hdr.version < 0x0209) 445 return; 446 pa_data = boot_params.hdr.setup_data; 447 while (pa_data) { 448 data = early_memremap(pa_data, sizeof(*data)); 449 e820_update_range(pa_data, sizeof(*data)+data->len, 450 E820_RAM, E820_RESERVED_KERN); 451 found = 1; 452 pa_data = data->next; 453 early_iounmap(data, sizeof(*data)); 454 } 455 if (!found) 456 return; 457 458 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 459 memcpy(&e820_saved, &e820, sizeof(struct e820map)); 460 printk(KERN_INFO "extended physical RAM map:\n"); 461 e820_print_map("reserve setup_data"); 462 } 463 464 static void __init reserve_early_setup_data(void) 465 { 466 struct setup_data *data; 467 u64 pa_data; 468 char buf[32]; 469 470 if (boot_params.hdr.version < 0x0209) 471 return; 472 pa_data = boot_params.hdr.setup_data; 473 while (pa_data) { 474 data = early_memremap(pa_data, sizeof(*data)); 475 sprintf(buf, "setup data %x", data->type); 476 reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf); 477 pa_data = data->next; 478 early_iounmap(data, sizeof(*data)); 479 } 480 } 481 482 /* 483 * --------- Crashkernel reservation ------------------------------ 484 */ 485 486 #ifdef CONFIG_KEXEC 487 488 /** 489 * Reserve @size bytes of crashkernel memory at any suitable offset. 490 * 491 * @size: Size of the crashkernel memory to reserve. 492 * Returns the base address on success, and -1ULL on failure. 493 */ 494 static 495 unsigned long long __init find_and_reserve_crashkernel(unsigned long long size) 496 { 497 const unsigned long long alignment = 16<<20; /* 16M */ 498 unsigned long long start = 0LL; 499 500 while (1) { 501 int ret; 502 503 start = find_e820_area(start, ULONG_MAX, size, alignment); 504 if (start == -1ULL) 505 return start; 506 507 /* try to reserve it */ 508 ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE); 509 if (ret >= 0) 510 return start; 511 512 start += alignment; 513 } 514 } 515 516 static inline unsigned long long get_total_mem(void) 517 { 518 unsigned long long total; 519 520 total = max_low_pfn - min_low_pfn; 521 #ifdef CONFIG_HIGHMEM 522 total += highend_pfn - highstart_pfn; 523 #endif 524 525 return total << PAGE_SHIFT; 526 } 527 528 static void __init reserve_crashkernel(void) 529 { 530 unsigned long long total_mem; 531 unsigned long long crash_size, crash_base; 532 int ret; 533 534 total_mem = get_total_mem(); 535 536 ret = parse_crashkernel(boot_command_line, total_mem, 537 &crash_size, &crash_base); 538 if (ret != 0 || crash_size <= 0) 539 return; 540 541 /* 0 means: find the address automatically */ 542 if (crash_base <= 0) { 543 crash_base = find_and_reserve_crashkernel(crash_size); 544 if (crash_base == -1ULL) { 545 pr_info("crashkernel reservation failed. " 546 "No suitable area found.\n"); 547 return; 548 } 549 } else { 550 ret = reserve_bootmem_generic(crash_base, crash_size, 551 BOOTMEM_EXCLUSIVE); 552 if (ret < 0) { 553 pr_info("crashkernel reservation failed - " 554 "memory is in use\n"); 555 return; 556 } 557 } 558 559 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " 560 "for crashkernel (System RAM: %ldMB)\n", 561 (unsigned long)(crash_size >> 20), 562 (unsigned long)(crash_base >> 20), 563 (unsigned long)(total_mem >> 20)); 564 565 crashk_res.start = crash_base; 566 crashk_res.end = crash_base + crash_size - 1; 567 insert_resource(&iomem_resource, &crashk_res); 568 } 569 #else 570 static void __init reserve_crashkernel(void) 571 { 572 } 573 #endif 574 575 static struct resource standard_io_resources[] = { 576 { .name = "dma1", .start = 0x00, .end = 0x1f, 577 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 578 { .name = "pic1", .start = 0x20, .end = 0x21, 579 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 580 { .name = "timer0", .start = 0x40, .end = 0x43, 581 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 582 { .name = "timer1", .start = 0x50, .end = 0x53, 583 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 584 { .name = "keyboard", .start = 0x60, .end = 0x60, 585 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 586 { .name = "keyboard", .start = 0x64, .end = 0x64, 587 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 588 { .name = "dma page reg", .start = 0x80, .end = 0x8f, 589 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 590 { .name = "pic2", .start = 0xa0, .end = 0xa1, 591 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 592 { .name = "dma2", .start = 0xc0, .end = 0xdf, 593 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 594 { .name = "fpu", .start = 0xf0, .end = 0xff, 595 .flags = IORESOURCE_BUSY | IORESOURCE_IO } 596 }; 597 598 void __init reserve_standard_io_resources(void) 599 { 600 int i; 601 602 /* request I/O space for devices used on all i[345]86 PCs */ 603 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) 604 request_resource(&ioport_resource, &standard_io_resources[i]); 605 606 } 607 608 /* 609 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by 610 * is_kdump_kernel() to determine if we are booting after a panic. Hence 611 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE. 612 */ 613 614 #ifdef CONFIG_CRASH_DUMP 615 /* elfcorehdr= specifies the location of elf core header 616 * stored by the crashed kernel. This option will be passed 617 * by kexec loader to the capture kernel. 618 */ 619 static int __init setup_elfcorehdr(char *arg) 620 { 621 char *end; 622 if (!arg) 623 return -EINVAL; 624 elfcorehdr_addr = memparse(arg, &end); 625 return end > arg ? 0 : -EINVAL; 626 } 627 early_param("elfcorehdr", setup_elfcorehdr); 628 #endif 629 630 #ifdef CONFIG_X86_RESERVE_LOW_64K 631 static int __init dmi_low_memory_corruption(const struct dmi_system_id *d) 632 { 633 printk(KERN_NOTICE 634 "%s detected: BIOS may corrupt low RAM, working around it.\n", 635 d->ident); 636 637 e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED); 638 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 639 640 return 0; 641 } 642 #endif 643 644 /* List of systems that have known low memory corruption BIOS problems */ 645 static struct dmi_system_id __initdata bad_bios_dmi_table[] = { 646 #ifdef CONFIG_X86_RESERVE_LOW_64K 647 { 648 .callback = dmi_low_memory_corruption, 649 .ident = "AMI BIOS", 650 .matches = { 651 DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), 652 }, 653 }, 654 { 655 .callback = dmi_low_memory_corruption, 656 .ident = "Phoenix BIOS", 657 .matches = { 658 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"), 659 }, 660 }, 661 { 662 /* 663 * AMI BIOS with low memory corruption was found on Intel DG45ID board. 664 * It hase different DMI_BIOS_VENDOR = "Intel Corp.", for now we will 665 * match only DMI_BOARD_NAME and see if there is more bad products 666 * with this vendor. 667 */ 668 .callback = dmi_low_memory_corruption, 669 .ident = "AMI BIOS", 670 .matches = { 671 DMI_MATCH(DMI_BOARD_NAME, "DG45ID"), 672 }, 673 }, 674 #endif 675 {} 676 }; 677 678 /* 679 * Determine if we were loaded by an EFI loader. If so, then we have also been 680 * passed the efi memmap, systab, etc., so we should use these data structures 681 * for initialization. Note, the efi init code path is determined by the 682 * global efi_enabled. This allows the same kernel image to be used on existing 683 * systems (with a traditional BIOS) as well as on EFI systems. 684 */ 685 /* 686 * setup_arch - architecture-specific boot-time initializations 687 * 688 * Note: On x86_64, fixmaps are ready for use even before this is called. 689 */ 690 691 void __init setup_arch(char **cmdline_p) 692 { 693 #ifdef CONFIG_X86_32 694 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); 695 visws_early_detect(); 696 #else 697 printk(KERN_INFO "Command line: %s\n", boot_command_line); 698 #endif 699 700 /* VMI may relocate the fixmap; do this before touching ioremap area */ 701 vmi_init(); 702 703 early_cpu_init(); 704 early_ioremap_init(); 705 706 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); 707 screen_info = boot_params.screen_info; 708 edid_info = boot_params.edid_info; 709 #ifdef CONFIG_X86_32 710 apm_info.bios = boot_params.apm_bios_info; 711 ist_info = boot_params.ist_info; 712 if (boot_params.sys_desc_table.length != 0) { 713 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); 714 machine_id = boot_params.sys_desc_table.table[0]; 715 machine_submodel_id = boot_params.sys_desc_table.table[1]; 716 BIOS_revision = boot_params.sys_desc_table.table[2]; 717 } 718 #endif 719 saved_video_mode = boot_params.hdr.vid_mode; 720 bootloader_type = boot_params.hdr.type_of_loader; 721 if ((bootloader_type >> 4) == 0xe) { 722 bootloader_type &= 0xf; 723 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4; 724 } 725 bootloader_version = bootloader_type & 0xf; 726 bootloader_version |= boot_params.hdr.ext_loader_ver << 4; 727 728 #ifdef CONFIG_BLK_DEV_RAM 729 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; 730 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); 731 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); 732 #endif 733 #ifdef CONFIG_EFI 734 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, 735 #ifdef CONFIG_X86_32 736 "EL32", 737 #else 738 "EL64", 739 #endif 740 4)) { 741 efi_enabled = 1; 742 efi_reserve_early(); 743 } 744 #endif 745 746 x86_init.oem.arch_setup(); 747 748 setup_memory_map(); 749 parse_setup_data(); 750 /* update the e820_saved too */ 751 e820_reserve_setup_data(); 752 753 copy_edd(); 754 755 if (!boot_params.hdr.root_flags) 756 root_mountflags &= ~MS_RDONLY; 757 init_mm.start_code = (unsigned long) _text; 758 init_mm.end_code = (unsigned long) _etext; 759 init_mm.end_data = (unsigned long) _edata; 760 init_mm.brk = _brk_end; 761 762 code_resource.start = virt_to_phys(_text); 763 code_resource.end = virt_to_phys(_etext)-1; 764 data_resource.start = virt_to_phys(_etext); 765 data_resource.end = virt_to_phys(_edata)-1; 766 bss_resource.start = virt_to_phys(&__bss_start); 767 bss_resource.end = virt_to_phys(&__bss_stop)-1; 768 769 #ifdef CONFIG_CMDLINE_BOOL 770 #ifdef CONFIG_CMDLINE_OVERRIDE 771 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); 772 #else 773 if (builtin_cmdline[0]) { 774 /* append boot loader cmdline to builtin */ 775 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); 776 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); 777 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); 778 } 779 #endif 780 #endif 781 782 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); 783 *cmdline_p = command_line; 784 785 #ifdef CONFIG_X86_64 786 /* 787 * Must call this twice: Once just to detect whether hardware doesn't 788 * support NX (so that the early EHCI debug console setup can safely 789 * call set_fixmap(), and then again after parsing early parameters to 790 * honor the respective command line option. 791 */ 792 check_efer(); 793 #endif 794 795 parse_early_param(); 796 797 #ifdef CONFIG_X86_64 798 check_efer(); 799 #endif 800 801 /* Must be before kernel pagetables are setup */ 802 vmi_activate(); 803 804 /* after early param, so could get panic from serial */ 805 reserve_early_setup_data(); 806 807 if (acpi_mps_check()) { 808 #ifdef CONFIG_X86_LOCAL_APIC 809 disable_apic = 1; 810 #endif 811 setup_clear_cpu_cap(X86_FEATURE_APIC); 812 } 813 814 #ifdef CONFIG_PCI 815 if (pci_early_dump_regs) 816 early_dump_pci_devices(); 817 #endif 818 819 finish_e820_parsing(); 820 821 if (efi_enabled) 822 efi_init(); 823 824 dmi_scan_machine(); 825 826 dmi_check_system(bad_bios_dmi_table); 827 828 /* 829 * VMware detection requires dmi to be available, so this 830 * needs to be done after dmi_scan_machine, for the BP. 831 */ 832 init_hypervisor_platform(); 833 834 x86_init.resources.probe_roms(); 835 836 /* after parse_early_param, so could debug it */ 837 insert_resource(&iomem_resource, &code_resource); 838 insert_resource(&iomem_resource, &data_resource); 839 insert_resource(&iomem_resource, &bss_resource); 840 841 842 #ifdef CONFIG_X86_32 843 if (ppro_with_ram_bug()) { 844 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, 845 E820_RESERVED); 846 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 847 printk(KERN_INFO "fixed physical RAM map:\n"); 848 e820_print_map("bad_ppro"); 849 } 850 #else 851 early_gart_iommu_check(); 852 #endif 853 854 /* 855 * partially used pages are not usable - thus 856 * we are rounding upwards: 857 */ 858 max_pfn = e820_end_of_ram_pfn(); 859 860 /* preallocate 4k for mptable mpc */ 861 early_reserve_e820_mpc_new(); 862 /* update e820 for memory not covered by WB MTRRs */ 863 mtrr_bp_init(); 864 if (mtrr_trim_uncached_memory(max_pfn)) 865 max_pfn = e820_end_of_ram_pfn(); 866 867 #ifdef CONFIG_X86_32 868 /* max_low_pfn get updated here */ 869 find_low_pfn_range(); 870 #else 871 num_physpages = max_pfn; 872 873 check_x2apic(); 874 875 /* How many end-of-memory variables you have, grandma! */ 876 /* need this before calling reserve_initrd */ 877 if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) 878 max_low_pfn = e820_end_of_low_ram_pfn(); 879 else 880 max_low_pfn = max_pfn; 881 882 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; 883 max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT; 884 #endif 885 886 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION 887 setup_bios_corruption_check(); 888 #endif 889 890 printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n", 891 max_pfn_mapped<<PAGE_SHIFT); 892 893 reserve_brk(); 894 895 init_gbpages(); 896 897 /* max_pfn_mapped is updated here */ 898 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); 899 max_pfn_mapped = max_low_pfn_mapped; 900 901 #ifdef CONFIG_X86_64 902 if (max_pfn > max_low_pfn) { 903 max_pfn_mapped = init_memory_mapping(1UL<<32, 904 max_pfn<<PAGE_SHIFT); 905 /* can we preseve max_low_pfn ?*/ 906 max_low_pfn = max_pfn; 907 } 908 #endif 909 910 /* 911 * NOTE: On x86-32, only from this point on, fixmaps are ready for use. 912 */ 913 914 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT 915 if (init_ohci1394_dma_early) 916 init_ohci1394_dma_on_all_controllers(); 917 #endif 918 919 reserve_initrd(); 920 921 vsmp_init(); 922 923 io_delay_init(); 924 925 /* 926 * Parse the ACPI tables for possible boot-time SMP configuration. 927 */ 928 acpi_boot_table_init(); 929 930 early_acpi_boot_init(); 931 932 #ifdef CONFIG_ACPI_NUMA 933 /* 934 * Parse SRAT to discover nodes. 935 */ 936 acpi_numa_init(); 937 #endif 938 939 initmem_init(0, max_pfn); 940 941 #ifdef CONFIG_ACPI_SLEEP 942 /* 943 * Reserve low memory region for sleep support. 944 */ 945 acpi_reserve_bootmem(); 946 #endif 947 /* 948 * Find and reserve possible boot-time SMP configuration: 949 */ 950 find_smp_config(); 951 952 reserve_crashkernel(); 953 954 #ifdef CONFIG_X86_64 955 /* 956 * dma32_reserve_bootmem() allocates bootmem which may conflict 957 * with the crashkernel command line, so do that after 958 * reserve_crashkernel() 959 */ 960 dma32_reserve_bootmem(); 961 #endif 962 963 reserve_ibft_region(); 964 965 #ifdef CONFIG_KVM_CLOCK 966 kvmclock_init(); 967 #endif 968 969 x86_init.paging.pagetable_setup_start(swapper_pg_dir); 970 paging_init(); 971 x86_init.paging.pagetable_setup_done(swapper_pg_dir); 972 973 tboot_probe(); 974 975 #ifdef CONFIG_X86_64 976 map_vsyscall(); 977 #endif 978 979 generic_apic_probe(); 980 981 early_quirks(); 982 983 /* 984 * Read APIC and some other early information from ACPI tables. 985 */ 986 acpi_boot_init(); 987 988 /* 989 * get boot-time SMP configuration: 990 */ 991 if (smp_found_config) 992 get_smp_config(); 993 994 prefill_possible_map(); 995 996 #ifdef CONFIG_X86_64 997 init_cpu_to_node(); 998 #endif 999 1000 init_apic_mappings(); 1001 ioapic_init_mappings(); 1002 1003 /* need to wait for io_apic is mapped */ 1004 probe_nr_irqs_gsi(); 1005 1006 kvm_guest_init(); 1007 1008 e820_reserve_resources(); 1009 e820_mark_nosave_regions(max_low_pfn); 1010 1011 x86_init.resources.reserve_resources(); 1012 1013 e820_setup_gap(); 1014 1015 #ifdef CONFIG_VT 1016 #if defined(CONFIG_VGA_CONSOLE) 1017 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) 1018 conswitchp = &vga_con; 1019 #elif defined(CONFIG_DUMMY_CONSOLE) 1020 conswitchp = &dummy_con; 1021 #endif 1022 #endif 1023 x86_init.oem.banner(); 1024 } 1025 1026 #ifdef CONFIG_X86_32 1027 1028 static struct resource video_ram_resource = { 1029 .name = "Video RAM area", 1030 .start = 0xa0000, 1031 .end = 0xbffff, 1032 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 1033 }; 1034 1035 void __init i386_reserve_resources(void) 1036 { 1037 request_resource(&iomem_resource, &video_ram_resource); 1038 reserve_standard_io_resources(); 1039 } 1040 1041 #endif /* CONFIG_X86_32 */ 1042