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/seq_file.h> 35 #include <linux/console.h> 36 #include <linux/mca.h> 37 #include <linux/root_dev.h> 38 #include <linux/highmem.h> 39 #include <linux/module.h> 40 #include <linux/efi.h> 41 #include <linux/init.h> 42 #include <linux/edd.h> 43 #include <linux/iscsi_ibft.h> 44 #include <linux/nodemask.h> 45 #include <linux/kexec.h> 46 #include <linux/dmi.h> 47 #include <linux/pfn.h> 48 #include <linux/pci.h> 49 #include <asm/pci-direct.h> 50 #include <linux/init_ohci1394_dma.h> 51 #include <linux/kvm_para.h> 52 53 #include <linux/errno.h> 54 #include <linux/kernel.h> 55 #include <linux/stddef.h> 56 #include <linux/unistd.h> 57 #include <linux/ptrace.h> 58 #include <linux/slab.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/vmi.h> 88 #include <asm/setup_arch.h> 89 #include <asm/bios_ebda.h> 90 #include <asm/cacheflush.h> 91 #include <asm/processor.h> 92 #include <asm/bugs.h> 93 94 #include <asm/system.h> 95 #include <asm/vsyscall.h> 96 #include <asm/cpu.h> 97 #include <asm/desc.h> 98 #include <asm/dma.h> 99 #include <asm/iommu.h> 100 #include <asm/gart.h> 101 #include <asm/mmu_context.h> 102 #include <asm/proto.h> 103 104 #include <asm/paravirt.h> 105 #include <asm/hypervisor.h> 106 107 #include <asm/percpu.h> 108 #include <asm/topology.h> 109 #include <asm/apicdef.h> 110 #include <asm/k8.h> 111 #ifdef CONFIG_X86_64 112 #include <asm/numa_64.h> 113 #endif 114 #include <asm/mce.h> 115 116 /* 117 * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries. 118 * The direct mapping extends to max_pfn_mapped, so that we can directly access 119 * apertures, ACPI and other tables without having to play with fixmaps. 120 */ 121 unsigned long max_low_pfn_mapped; 122 unsigned long max_pfn_mapped; 123 124 RESERVE_BRK(dmi_alloc, 65536); 125 126 unsigned int boot_cpu_id __read_mostly; 127 128 static __initdata unsigned long _brk_start = (unsigned long)__brk_base; 129 unsigned long _brk_end = (unsigned long)__brk_base; 130 131 #ifdef CONFIG_X86_64 132 int default_cpu_present_to_apicid(int mps_cpu) 133 { 134 return __default_cpu_present_to_apicid(mps_cpu); 135 } 136 137 int default_check_phys_apicid_present(int phys_apicid) 138 { 139 return __default_check_phys_apicid_present(phys_apicid); 140 } 141 #endif 142 143 #ifndef CONFIG_DEBUG_BOOT_PARAMS 144 struct boot_params __initdata boot_params; 145 #else 146 struct boot_params boot_params; 147 #endif 148 149 /* 150 * Machine setup.. 151 */ 152 static struct resource data_resource = { 153 .name = "Kernel data", 154 .start = 0, 155 .end = 0, 156 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 157 }; 158 159 static struct resource code_resource = { 160 .name = "Kernel code", 161 .start = 0, 162 .end = 0, 163 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 164 }; 165 166 static struct resource bss_resource = { 167 .name = "Kernel bss", 168 .start = 0, 169 .end = 0, 170 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 171 }; 172 173 174 #ifdef CONFIG_X86_32 175 /* cpu data as detected by the assembly code in head.S */ 176 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; 177 /* common cpu data for all cpus */ 178 struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; 179 EXPORT_SYMBOL(boot_cpu_data); 180 static void set_mca_bus(int x) 181 { 182 #ifdef CONFIG_MCA 183 MCA_bus = x; 184 #endif 185 } 186 187 unsigned int def_to_bigsmp; 188 189 /* for MCA, but anyone else can use it if they want */ 190 unsigned int machine_id; 191 unsigned int machine_submodel_id; 192 unsigned int BIOS_revision; 193 194 struct apm_info apm_info; 195 EXPORT_SYMBOL(apm_info); 196 197 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ 198 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) 199 struct ist_info ist_info; 200 EXPORT_SYMBOL(ist_info); 201 #else 202 struct ist_info ist_info; 203 #endif 204 205 #else 206 struct cpuinfo_x86 boot_cpu_data __read_mostly = { 207 .x86_phys_bits = MAX_PHYSMEM_BITS, 208 }; 209 EXPORT_SYMBOL(boot_cpu_data); 210 #endif 211 212 213 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) 214 unsigned long mmu_cr4_features; 215 #else 216 unsigned long mmu_cr4_features = X86_CR4_PAE; 217 #endif 218 219 /* Boot loader ID and version as integers, for the benefit of proc_dointvec */ 220 int bootloader_type, bootloader_version; 221 222 /* 223 * Setup options 224 */ 225 struct screen_info screen_info; 226 EXPORT_SYMBOL(screen_info); 227 struct edid_info edid_info; 228 EXPORT_SYMBOL_GPL(edid_info); 229 230 extern int root_mountflags; 231 232 unsigned long saved_video_mode; 233 234 #define RAMDISK_IMAGE_START_MASK 0x07FF 235 #define RAMDISK_PROMPT_FLAG 0x8000 236 #define RAMDISK_LOAD_FLAG 0x4000 237 238 static char __initdata command_line[COMMAND_LINE_SIZE]; 239 #ifdef CONFIG_CMDLINE_BOOL 240 static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; 241 #endif 242 243 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) 244 struct edd edd; 245 #ifdef CONFIG_EDD_MODULE 246 EXPORT_SYMBOL(edd); 247 #endif 248 /** 249 * copy_edd() - Copy the BIOS EDD information 250 * from boot_params into a safe place. 251 * 252 */ 253 static inline void __init copy_edd(void) 254 { 255 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, 256 sizeof(edd.mbr_signature)); 257 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); 258 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; 259 edd.edd_info_nr = boot_params.eddbuf_entries; 260 } 261 #else 262 static inline void __init copy_edd(void) 263 { 264 } 265 #endif 266 267 void * __init extend_brk(size_t size, size_t align) 268 { 269 size_t mask = align - 1; 270 void *ret; 271 272 BUG_ON(_brk_start == 0); 273 BUG_ON(align & mask); 274 275 _brk_end = (_brk_end + mask) & ~mask; 276 BUG_ON((char *)(_brk_end + size) > __brk_limit); 277 278 ret = (void *)_brk_end; 279 _brk_end += size; 280 281 memset(ret, 0, size); 282 283 return ret; 284 } 285 286 #ifdef CONFIG_X86_64 287 static void __init init_gbpages(void) 288 { 289 if (direct_gbpages && cpu_has_gbpages) 290 printk(KERN_INFO "Using GB pages for direct mapping\n"); 291 else 292 direct_gbpages = 0; 293 } 294 #else 295 static inline void init_gbpages(void) 296 { 297 } 298 #endif 299 300 static void __init reserve_brk(void) 301 { 302 if (_brk_end > _brk_start) 303 reserve_early(__pa(_brk_start), __pa(_brk_end), "BRK"); 304 305 /* Mark brk area as locked down and no longer taking any 306 new allocations */ 307 _brk_start = 0; 308 } 309 310 #ifdef CONFIG_BLK_DEV_INITRD 311 312 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) 313 static void __init relocate_initrd(void) 314 { 315 316 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 317 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 318 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; 319 u64 ramdisk_here; 320 unsigned long slop, clen, mapaddr; 321 char *p, *q; 322 323 /* We need to move the initrd down into lowmem */ 324 ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size, 325 PAGE_SIZE); 326 327 if (ramdisk_here == -1ULL) 328 panic("Cannot find place for new RAMDISK of size %lld\n", 329 ramdisk_size); 330 331 /* Note: this includes all the lowmem currently occupied by 332 the initrd, we rely on that fact to keep the data intact. */ 333 reserve_early(ramdisk_here, ramdisk_here + ramdisk_size, 334 "NEW RAMDISK"); 335 initrd_start = ramdisk_here + PAGE_OFFSET; 336 initrd_end = initrd_start + ramdisk_size; 337 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", 338 ramdisk_here, ramdisk_here + ramdisk_size); 339 340 q = (char *)initrd_start; 341 342 /* Copy any lowmem portion of the initrd */ 343 if (ramdisk_image < end_of_lowmem) { 344 clen = end_of_lowmem - ramdisk_image; 345 p = (char *)__va(ramdisk_image); 346 memcpy(q, p, clen); 347 q += clen; 348 ramdisk_image += clen; 349 ramdisk_size -= clen; 350 } 351 352 /* Copy the highmem portion of the initrd */ 353 while (ramdisk_size) { 354 slop = ramdisk_image & ~PAGE_MASK; 355 clen = ramdisk_size; 356 if (clen > MAX_MAP_CHUNK-slop) 357 clen = MAX_MAP_CHUNK-slop; 358 mapaddr = ramdisk_image & PAGE_MASK; 359 p = early_memremap(mapaddr, clen+slop); 360 memcpy(q, p+slop, clen); 361 early_iounmap(p, clen+slop); 362 q += clen; 363 ramdisk_image += clen; 364 ramdisk_size -= clen; 365 } 366 /* high pages is not converted by early_res_to_bootmem */ 367 ramdisk_image = boot_params.hdr.ramdisk_image; 368 ramdisk_size = boot_params.hdr.ramdisk_size; 369 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" 370 " %08llx - %08llx\n", 371 ramdisk_image, ramdisk_image + ramdisk_size - 1, 372 ramdisk_here, ramdisk_here + ramdisk_size - 1); 373 } 374 375 static void __init reserve_initrd(void) 376 { 377 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 378 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 379 u64 ramdisk_end = ramdisk_image + ramdisk_size; 380 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; 381 382 if (!boot_params.hdr.type_of_loader || 383 !ramdisk_image || !ramdisk_size) 384 return; /* No initrd provided by bootloader */ 385 386 initrd_start = 0; 387 388 if (ramdisk_size >= (end_of_lowmem>>1)) { 389 free_early(ramdisk_image, ramdisk_end); 390 printk(KERN_ERR "initrd too large to handle, " 391 "disabling initrd\n"); 392 return; 393 } 394 395 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, 396 ramdisk_end); 397 398 399 if (ramdisk_end <= end_of_lowmem) { 400 /* All in lowmem, easy case */ 401 /* 402 * don't need to reserve again, already reserved early 403 * in i386_start_kernel 404 */ 405 initrd_start = ramdisk_image + PAGE_OFFSET; 406 initrd_end = initrd_start + ramdisk_size; 407 return; 408 } 409 410 relocate_initrd(); 411 412 free_early(ramdisk_image, ramdisk_end); 413 } 414 #else 415 static void __init reserve_initrd(void) 416 { 417 } 418 #endif /* CONFIG_BLK_DEV_INITRD */ 419 420 static void __init parse_setup_data(void) 421 { 422 struct setup_data *data; 423 u64 pa_data; 424 425 if (boot_params.hdr.version < 0x0209) 426 return; 427 pa_data = boot_params.hdr.setup_data; 428 while (pa_data) { 429 data = early_memremap(pa_data, PAGE_SIZE); 430 switch (data->type) { 431 case SETUP_E820_EXT: 432 parse_e820_ext(data, pa_data); 433 break; 434 default: 435 break; 436 } 437 pa_data = data->next; 438 early_iounmap(data, PAGE_SIZE); 439 } 440 } 441 442 static void __init e820_reserve_setup_data(void) 443 { 444 struct setup_data *data; 445 u64 pa_data; 446 int found = 0; 447 448 if (boot_params.hdr.version < 0x0209) 449 return; 450 pa_data = boot_params.hdr.setup_data; 451 while (pa_data) { 452 data = early_memremap(pa_data, sizeof(*data)); 453 e820_update_range(pa_data, sizeof(*data)+data->len, 454 E820_RAM, E820_RESERVED_KERN); 455 found = 1; 456 pa_data = data->next; 457 early_iounmap(data, sizeof(*data)); 458 } 459 if (!found) 460 return; 461 462 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 463 memcpy(&e820_saved, &e820, sizeof(struct e820map)); 464 printk(KERN_INFO "extended physical RAM map:\n"); 465 e820_print_map("reserve setup_data"); 466 } 467 468 static void __init reserve_early_setup_data(void) 469 { 470 struct setup_data *data; 471 u64 pa_data; 472 char buf[32]; 473 474 if (boot_params.hdr.version < 0x0209) 475 return; 476 pa_data = boot_params.hdr.setup_data; 477 while (pa_data) { 478 data = early_memremap(pa_data, sizeof(*data)); 479 sprintf(buf, "setup data %x", data->type); 480 reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf); 481 pa_data = data->next; 482 early_iounmap(data, sizeof(*data)); 483 } 484 } 485 486 /* 487 * --------- Crashkernel reservation ------------------------------ 488 */ 489 490 #ifdef CONFIG_KEXEC 491 492 static inline unsigned long long get_total_mem(void) 493 { 494 unsigned long long total; 495 496 total = max_pfn - min_low_pfn; 497 498 return total << PAGE_SHIFT; 499 } 500 501 static void __init reserve_crashkernel(void) 502 { 503 unsigned long long total_mem; 504 unsigned long long crash_size, crash_base; 505 int ret; 506 507 total_mem = get_total_mem(); 508 509 ret = parse_crashkernel(boot_command_line, total_mem, 510 &crash_size, &crash_base); 511 if (ret != 0 || crash_size <= 0) 512 return; 513 514 /* 0 means: find the address automatically */ 515 if (crash_base <= 0) { 516 const unsigned long long alignment = 16<<20; /* 16M */ 517 518 crash_base = find_e820_area(alignment, ULONG_MAX, crash_size, 519 alignment); 520 if (crash_base == -1ULL) { 521 pr_info("crashkernel reservation failed - No suitable area found.\n"); 522 return; 523 } 524 } else { 525 unsigned long long start; 526 527 start = find_e820_area(crash_base, ULONG_MAX, crash_size, 528 1<<20); 529 if (start != crash_base) { 530 pr_info("crashkernel reservation failed - memory is in use.\n"); 531 return; 532 } 533 } 534 reserve_early(crash_base, crash_base + crash_size, "CRASH KERNEL"); 535 536 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " 537 "for crashkernel (System RAM: %ldMB)\n", 538 (unsigned long)(crash_size >> 20), 539 (unsigned long)(crash_base >> 20), 540 (unsigned long)(total_mem >> 20)); 541 542 crashk_res.start = crash_base; 543 crashk_res.end = crash_base + crash_size - 1; 544 insert_resource(&iomem_resource, &crashk_res); 545 } 546 #else 547 static void __init reserve_crashkernel(void) 548 { 549 } 550 #endif 551 552 static struct resource standard_io_resources[] = { 553 { .name = "dma1", .start = 0x00, .end = 0x1f, 554 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 555 { .name = "pic1", .start = 0x20, .end = 0x21, 556 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 557 { .name = "timer0", .start = 0x40, .end = 0x43, 558 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 559 { .name = "timer1", .start = 0x50, .end = 0x53, 560 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 561 { .name = "keyboard", .start = 0x60, .end = 0x60, 562 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 563 { .name = "keyboard", .start = 0x64, .end = 0x64, 564 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 565 { .name = "dma page reg", .start = 0x80, .end = 0x8f, 566 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 567 { .name = "pic2", .start = 0xa0, .end = 0xa1, 568 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 569 { .name = "dma2", .start = 0xc0, .end = 0xdf, 570 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 571 { .name = "fpu", .start = 0xf0, .end = 0xff, 572 .flags = IORESOURCE_BUSY | IORESOURCE_IO } 573 }; 574 575 void __init reserve_standard_io_resources(void) 576 { 577 int i; 578 579 /* request I/O space for devices used on all i[345]86 PCs */ 580 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) 581 request_resource(&ioport_resource, &standard_io_resources[i]); 582 583 } 584 585 /* 586 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by 587 * is_kdump_kernel() to determine if we are booting after a panic. Hence 588 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE. 589 */ 590 591 #ifdef CONFIG_CRASH_DUMP 592 /* elfcorehdr= specifies the location of elf core header 593 * stored by the crashed kernel. This option will be passed 594 * by kexec loader to the capture kernel. 595 */ 596 static int __init setup_elfcorehdr(char *arg) 597 { 598 char *end; 599 if (!arg) 600 return -EINVAL; 601 elfcorehdr_addr = memparse(arg, &end); 602 return end > arg ? 0 : -EINVAL; 603 } 604 early_param("elfcorehdr", setup_elfcorehdr); 605 #endif 606 607 #ifdef CONFIG_X86_RESERVE_LOW_64K 608 static int __init dmi_low_memory_corruption(const struct dmi_system_id *d) 609 { 610 printk(KERN_NOTICE 611 "%s detected: BIOS may corrupt low RAM, working around it.\n", 612 d->ident); 613 614 e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED); 615 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 616 617 return 0; 618 } 619 #endif 620 621 /* List of systems that have known low memory corruption BIOS problems */ 622 static struct dmi_system_id __initdata bad_bios_dmi_table[] = { 623 #ifdef CONFIG_X86_RESERVE_LOW_64K 624 { 625 .callback = dmi_low_memory_corruption, 626 .ident = "AMI BIOS", 627 .matches = { 628 DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), 629 }, 630 }, 631 { 632 .callback = dmi_low_memory_corruption, 633 .ident = "Phoenix BIOS", 634 .matches = { 635 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"), 636 }, 637 }, 638 { 639 .callback = dmi_low_memory_corruption, 640 .ident = "Phoenix/MSC BIOS", 641 .matches = { 642 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix/MSC"), 643 }, 644 }, 645 /* 646 * AMI BIOS with low memory corruption was found on Intel DG45ID and 647 * DG45FC boards. 648 * It has a different DMI_BIOS_VENDOR = "Intel Corp.", for now we will 649 * match only DMI_BOARD_NAME and see if there is more bad products 650 * with this vendor. 651 */ 652 { 653 .callback = dmi_low_memory_corruption, 654 .ident = "AMI BIOS", 655 .matches = { 656 DMI_MATCH(DMI_BOARD_NAME, "DG45ID"), 657 }, 658 }, 659 { 660 .callback = dmi_low_memory_corruption, 661 .ident = "AMI BIOS", 662 .matches = { 663 DMI_MATCH(DMI_BOARD_NAME, "DG45FC"), 664 }, 665 }, 666 #endif 667 {} 668 }; 669 670 /* 671 * Determine if we were loaded by an EFI loader. If so, then we have also been 672 * passed the efi memmap, systab, etc., so we should use these data structures 673 * for initialization. Note, the efi init code path is determined by the 674 * global efi_enabled. This allows the same kernel image to be used on existing 675 * systems (with a traditional BIOS) as well as on EFI systems. 676 */ 677 /* 678 * setup_arch - architecture-specific boot-time initializations 679 * 680 * Note: On x86_64, fixmaps are ready for use even before this is called. 681 */ 682 683 void __init setup_arch(char **cmdline_p) 684 { 685 int acpi = 0; 686 int k8 = 0; 687 688 #ifdef CONFIG_X86_32 689 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); 690 visws_early_detect(); 691 #else 692 printk(KERN_INFO "Command line: %s\n", boot_command_line); 693 #endif 694 695 /* VMI may relocate the fixmap; do this before touching ioremap area */ 696 vmi_init(); 697 698 early_cpu_init(); 699 early_ioremap_init(); 700 701 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); 702 screen_info = boot_params.screen_info; 703 edid_info = boot_params.edid_info; 704 #ifdef CONFIG_X86_32 705 apm_info.bios = boot_params.apm_bios_info; 706 ist_info = boot_params.ist_info; 707 if (boot_params.sys_desc_table.length != 0) { 708 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); 709 machine_id = boot_params.sys_desc_table.table[0]; 710 machine_submodel_id = boot_params.sys_desc_table.table[1]; 711 BIOS_revision = boot_params.sys_desc_table.table[2]; 712 } 713 #endif 714 saved_video_mode = boot_params.hdr.vid_mode; 715 bootloader_type = boot_params.hdr.type_of_loader; 716 if ((bootloader_type >> 4) == 0xe) { 717 bootloader_type &= 0xf; 718 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4; 719 } 720 bootloader_version = bootloader_type & 0xf; 721 bootloader_version |= boot_params.hdr.ext_loader_ver << 4; 722 723 #ifdef CONFIG_BLK_DEV_RAM 724 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; 725 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); 726 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); 727 #endif 728 #ifdef CONFIG_EFI 729 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, 730 #ifdef CONFIG_X86_32 731 "EL32", 732 #else 733 "EL64", 734 #endif 735 4)) { 736 efi_enabled = 1; 737 efi_reserve_early(); 738 } 739 #endif 740 741 x86_init.oem.arch_setup(); 742 743 setup_memory_map(); 744 parse_setup_data(); 745 /* update the e820_saved too */ 746 e820_reserve_setup_data(); 747 748 copy_edd(); 749 750 if (!boot_params.hdr.root_flags) 751 root_mountflags &= ~MS_RDONLY; 752 init_mm.start_code = (unsigned long) _text; 753 init_mm.end_code = (unsigned long) _etext; 754 init_mm.end_data = (unsigned long) _edata; 755 init_mm.brk = _brk_end; 756 757 code_resource.start = virt_to_phys(_text); 758 code_resource.end = virt_to_phys(_etext)-1; 759 data_resource.start = virt_to_phys(_etext); 760 data_resource.end = virt_to_phys(_edata)-1; 761 bss_resource.start = virt_to_phys(&__bss_start); 762 bss_resource.end = virt_to_phys(&__bss_stop)-1; 763 764 #ifdef CONFIG_CMDLINE_BOOL 765 #ifdef CONFIG_CMDLINE_OVERRIDE 766 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); 767 #else 768 if (builtin_cmdline[0]) { 769 /* append boot loader cmdline to builtin */ 770 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); 771 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); 772 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); 773 } 774 #endif 775 #endif 776 777 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); 778 *cmdline_p = command_line; 779 780 /* 781 * x86_configure_nx() is called before parse_early_param() to detect 782 * whether hardware doesn't support NX (so that the early EHCI debug 783 * console setup can safely call set_fixmap()). It may then be called 784 * again from within noexec_setup() during parsing early parameters 785 * to honor the respective command line option. 786 */ 787 x86_configure_nx(); 788 789 parse_early_param(); 790 791 x86_report_nx(); 792 793 /* Must be before kernel pagetables are setup */ 794 vmi_activate(); 795 796 /* after early param, so could get panic from serial */ 797 reserve_early_setup_data(); 798 799 if (acpi_mps_check()) { 800 #ifdef CONFIG_X86_LOCAL_APIC 801 disable_apic = 1; 802 #endif 803 setup_clear_cpu_cap(X86_FEATURE_APIC); 804 } 805 806 #ifdef CONFIG_PCI 807 if (pci_early_dump_regs) 808 early_dump_pci_devices(); 809 #endif 810 811 finish_e820_parsing(); 812 813 if (efi_enabled) 814 efi_init(); 815 816 dmi_scan_machine(); 817 818 dmi_check_system(bad_bios_dmi_table); 819 820 /* 821 * VMware detection requires dmi to be available, so this 822 * needs to be done after dmi_scan_machine, for the BP. 823 */ 824 init_hypervisor_platform(); 825 826 x86_init.resources.probe_roms(); 827 828 /* after parse_early_param, so could debug it */ 829 insert_resource(&iomem_resource, &code_resource); 830 insert_resource(&iomem_resource, &data_resource); 831 insert_resource(&iomem_resource, &bss_resource); 832 833 834 #ifdef CONFIG_X86_32 835 if (ppro_with_ram_bug()) { 836 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, 837 E820_RESERVED); 838 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 839 printk(KERN_INFO "fixed physical RAM map:\n"); 840 e820_print_map("bad_ppro"); 841 } 842 #else 843 early_gart_iommu_check(); 844 #endif 845 846 /* 847 * partially used pages are not usable - thus 848 * we are rounding upwards: 849 */ 850 max_pfn = e820_end_of_ram_pfn(); 851 852 /* preallocate 4k for mptable mpc */ 853 early_reserve_e820_mpc_new(); 854 /* update e820 for memory not covered by WB MTRRs */ 855 mtrr_bp_init(); 856 if (mtrr_trim_uncached_memory(max_pfn)) 857 max_pfn = e820_end_of_ram_pfn(); 858 859 #ifdef CONFIG_X86_32 860 /* max_low_pfn get updated here */ 861 find_low_pfn_range(); 862 #else 863 num_physpages = max_pfn; 864 865 check_x2apic(); 866 867 /* How many end-of-memory variables you have, grandma! */ 868 /* need this before calling reserve_initrd */ 869 if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) 870 max_low_pfn = e820_end_of_low_ram_pfn(); 871 else 872 max_low_pfn = max_pfn; 873 874 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; 875 max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT; 876 #endif 877 878 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION 879 setup_bios_corruption_check(); 880 #endif 881 882 printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n", 883 max_pfn_mapped<<PAGE_SHIFT); 884 885 reserve_brk(); 886 887 /* 888 * Find and reserve possible boot-time SMP configuration: 889 */ 890 find_smp_config(); 891 892 reserve_trampoline_memory(); 893 894 #ifdef CONFIG_ACPI_SLEEP 895 /* 896 * Reserve low memory region for sleep support. 897 * even before init_memory_mapping 898 */ 899 acpi_reserve_wakeup_memory(); 900 #endif 901 init_gbpages(); 902 903 /* max_pfn_mapped is updated here */ 904 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); 905 max_pfn_mapped = max_low_pfn_mapped; 906 907 #ifdef CONFIG_X86_64 908 if (max_pfn > max_low_pfn) { 909 max_pfn_mapped = init_memory_mapping(1UL<<32, 910 max_pfn<<PAGE_SHIFT); 911 /* can we preseve max_low_pfn ?*/ 912 max_low_pfn = max_pfn; 913 } 914 #endif 915 916 /* 917 * NOTE: On x86-32, only from this point on, fixmaps are ready for use. 918 */ 919 920 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT 921 if (init_ohci1394_dma_early) 922 init_ohci1394_dma_on_all_controllers(); 923 #endif 924 925 reserve_initrd(); 926 927 reserve_crashkernel(); 928 929 vsmp_init(); 930 931 io_delay_init(); 932 933 /* 934 * Parse the ACPI tables for possible boot-time SMP configuration. 935 */ 936 acpi_boot_table_init(); 937 938 early_acpi_boot_init(); 939 940 #ifdef CONFIG_ACPI_NUMA 941 /* 942 * Parse SRAT to discover nodes. 943 */ 944 acpi = acpi_numa_init(); 945 #endif 946 947 #ifdef CONFIG_K8_NUMA 948 if (!acpi) 949 k8 = !k8_numa_init(0, max_pfn); 950 #endif 951 952 initmem_init(0, max_pfn, acpi, k8); 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 sfi_init(); 989 990 /* 991 * get boot-time SMP configuration: 992 */ 993 if (smp_found_config) 994 get_smp_config(); 995 996 prefill_possible_map(); 997 998 #ifdef CONFIG_X86_64 999 init_cpu_to_node(); 1000 #endif 1001 1002 init_apic_mappings(); 1003 ioapic_init_mappings(); 1004 1005 /* need to wait for io_apic is mapped */ 1006 probe_nr_irqs_gsi(); 1007 1008 kvm_guest_init(); 1009 1010 e820_reserve_resources(); 1011 e820_mark_nosave_regions(max_low_pfn); 1012 1013 x86_init.resources.reserve_resources(); 1014 1015 e820_setup_gap(); 1016 1017 #ifdef CONFIG_VT 1018 #if defined(CONFIG_VGA_CONSOLE) 1019 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) 1020 conswitchp = &vga_con; 1021 #elif defined(CONFIG_DUMMY_CONSOLE) 1022 conswitchp = &dummy_con; 1023 #endif 1024 #endif 1025 x86_init.oem.banner(); 1026 1027 mcheck_init(); 1028 } 1029 1030 #ifdef CONFIG_X86_32 1031 1032 static struct resource video_ram_resource = { 1033 .name = "Video RAM area", 1034 .start = 0xa0000, 1035 .end = 0xbffff, 1036 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 1037 }; 1038 1039 void __init i386_reserve_resources(void) 1040 { 1041 request_resource(&iomem_resource, &video_ram_resource); 1042 reserve_standard_io_resources(); 1043 } 1044 1045 #endif /* CONFIG_X86_32 */ 1046