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 #include <asm/prom.h> 117 118 /* 119 * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries. 120 * The direct mapping extends to max_pfn_mapped, so that we can directly access 121 * apertures, ACPI and other tables without having to play with fixmaps. 122 */ 123 unsigned long max_low_pfn_mapped; 124 unsigned long max_pfn_mapped; 125 126 #ifdef CONFIG_DMI 127 RESERVE_BRK(dmi_alloc, 65536); 128 #endif 129 130 131 static __initdata unsigned long _brk_start = (unsigned long)__brk_base; 132 unsigned long _brk_end = (unsigned long)__brk_base; 133 134 #ifdef CONFIG_X86_64 135 int default_cpu_present_to_apicid(int mps_cpu) 136 { 137 return __default_cpu_present_to_apicid(mps_cpu); 138 } 139 140 int default_check_phys_apicid_present(int phys_apicid) 141 { 142 return __default_check_phys_apicid_present(phys_apicid); 143 } 144 #endif 145 146 #ifndef CONFIG_DEBUG_BOOT_PARAMS 147 struct boot_params __initdata boot_params; 148 #else 149 struct boot_params boot_params; 150 #endif 151 152 /* 153 * Machine setup.. 154 */ 155 static struct resource data_resource = { 156 .name = "Kernel data", 157 .start = 0, 158 .end = 0, 159 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 160 }; 161 162 static struct resource code_resource = { 163 .name = "Kernel code", 164 .start = 0, 165 .end = 0, 166 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 167 }; 168 169 static struct resource bss_resource = { 170 .name = "Kernel bss", 171 .start = 0, 172 .end = 0, 173 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 174 }; 175 176 177 #ifdef CONFIG_X86_32 178 /* cpu data as detected by the assembly code in head.S */ 179 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; 180 /* common cpu data for all cpus */ 181 struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; 182 EXPORT_SYMBOL(boot_cpu_data); 183 static void set_mca_bus(int x) 184 { 185 #ifdef CONFIG_MCA 186 MCA_bus = x; 187 #endif 188 } 189 190 unsigned int def_to_bigsmp; 191 192 /* for MCA, but anyone else can use it if they want */ 193 unsigned int machine_id; 194 unsigned int machine_submodel_id; 195 unsigned int BIOS_revision; 196 197 struct apm_info apm_info; 198 EXPORT_SYMBOL(apm_info); 199 200 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ 201 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) 202 struct ist_info ist_info; 203 EXPORT_SYMBOL(ist_info); 204 #else 205 struct ist_info ist_info; 206 #endif 207 208 #else 209 struct cpuinfo_x86 boot_cpu_data __read_mostly = { 210 .x86_phys_bits = MAX_PHYSMEM_BITS, 211 }; 212 EXPORT_SYMBOL(boot_cpu_data); 213 #endif 214 215 216 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) 217 unsigned long mmu_cr4_features; 218 #else 219 unsigned long mmu_cr4_features = X86_CR4_PAE; 220 #endif 221 222 /* Boot loader ID and version as integers, for the benefit of proc_dointvec */ 223 int bootloader_type, bootloader_version; 224 225 /* 226 * Setup options 227 */ 228 struct screen_info screen_info; 229 EXPORT_SYMBOL(screen_info); 230 struct edid_info edid_info; 231 EXPORT_SYMBOL_GPL(edid_info); 232 233 extern int root_mountflags; 234 235 unsigned long saved_video_mode; 236 237 #define RAMDISK_IMAGE_START_MASK 0x07FF 238 #define RAMDISK_PROMPT_FLAG 0x8000 239 #define RAMDISK_LOAD_FLAG 0x4000 240 241 static char __initdata command_line[COMMAND_LINE_SIZE]; 242 #ifdef CONFIG_CMDLINE_BOOL 243 static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; 244 #endif 245 246 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) 247 struct edd edd; 248 #ifdef CONFIG_EDD_MODULE 249 EXPORT_SYMBOL(edd); 250 #endif 251 /** 252 * copy_edd() - Copy the BIOS EDD information 253 * from boot_params into a safe place. 254 * 255 */ 256 static inline void __init copy_edd(void) 257 { 258 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, 259 sizeof(edd.mbr_signature)); 260 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); 261 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; 262 edd.edd_info_nr = boot_params.eddbuf_entries; 263 } 264 #else 265 static inline void __init copy_edd(void) 266 { 267 } 268 #endif 269 270 void * __init extend_brk(size_t size, size_t align) 271 { 272 size_t mask = align - 1; 273 void *ret; 274 275 BUG_ON(_brk_start == 0); 276 BUG_ON(align & mask); 277 278 _brk_end = (_brk_end + mask) & ~mask; 279 BUG_ON((char *)(_brk_end + size) > __brk_limit); 280 281 ret = (void *)_brk_end; 282 _brk_end += size; 283 284 memset(ret, 0, size); 285 286 return ret; 287 } 288 289 #ifdef CONFIG_X86_64 290 static void __init init_gbpages(void) 291 { 292 if (direct_gbpages && cpu_has_gbpages) 293 printk(KERN_INFO "Using GB pages for direct mapping\n"); 294 else 295 direct_gbpages = 0; 296 } 297 #else 298 static inline void init_gbpages(void) 299 { 300 } 301 static void __init cleanup_highmap(void) 302 { 303 } 304 #endif 305 306 static void __init reserve_brk(void) 307 { 308 if (_brk_end > _brk_start) 309 memblock_reserve(__pa(_brk_start), 310 __pa(_brk_end) - __pa(_brk_start)); 311 312 /* Mark brk area as locked down and no longer taking any 313 new allocations */ 314 _brk_start = 0; 315 } 316 317 #ifdef CONFIG_BLK_DEV_INITRD 318 319 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) 320 static void __init relocate_initrd(void) 321 { 322 /* Assume only end is not page aligned */ 323 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 324 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 325 u64 area_size = PAGE_ALIGN(ramdisk_size); 326 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; 327 u64 ramdisk_here; 328 unsigned long slop, clen, mapaddr; 329 char *p, *q; 330 331 /* We need to move the initrd down into lowmem */ 332 ramdisk_here = memblock_find_in_range(0, end_of_lowmem, area_size, 333 PAGE_SIZE); 334 335 if (!ramdisk_here) 336 panic("Cannot find place for new RAMDISK of size %lld\n", 337 ramdisk_size); 338 339 /* Note: this includes all the lowmem currently occupied by 340 the initrd, we rely on that fact to keep the data intact. */ 341 memblock_reserve(ramdisk_here, area_size); 342 initrd_start = ramdisk_here + PAGE_OFFSET; 343 initrd_end = initrd_start + ramdisk_size; 344 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", 345 ramdisk_here, ramdisk_here + ramdisk_size); 346 347 q = (char *)initrd_start; 348 349 /* Copy any lowmem portion of the initrd */ 350 if (ramdisk_image < end_of_lowmem) { 351 clen = end_of_lowmem - ramdisk_image; 352 p = (char *)__va(ramdisk_image); 353 memcpy(q, p, clen); 354 q += clen; 355 ramdisk_image += clen; 356 ramdisk_size -= clen; 357 } 358 359 /* Copy the highmem portion of the initrd */ 360 while (ramdisk_size) { 361 slop = ramdisk_image & ~PAGE_MASK; 362 clen = ramdisk_size; 363 if (clen > MAX_MAP_CHUNK-slop) 364 clen = MAX_MAP_CHUNK-slop; 365 mapaddr = ramdisk_image & PAGE_MASK; 366 p = early_memremap(mapaddr, clen+slop); 367 memcpy(q, p+slop, clen); 368 early_iounmap(p, clen+slop); 369 q += clen; 370 ramdisk_image += clen; 371 ramdisk_size -= clen; 372 } 373 /* high pages is not converted by early_res_to_bootmem */ 374 ramdisk_image = boot_params.hdr.ramdisk_image; 375 ramdisk_size = boot_params.hdr.ramdisk_size; 376 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" 377 " %08llx - %08llx\n", 378 ramdisk_image, ramdisk_image + ramdisk_size - 1, 379 ramdisk_here, ramdisk_here + ramdisk_size - 1); 380 } 381 382 static void __init reserve_initrd(void) 383 { 384 /* Assume only end is not page aligned */ 385 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 386 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 387 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); 388 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; 389 390 if (!boot_params.hdr.type_of_loader || 391 !ramdisk_image || !ramdisk_size) 392 return; /* No initrd provided by bootloader */ 393 394 initrd_start = 0; 395 396 if (ramdisk_size >= (end_of_lowmem>>1)) { 397 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image); 398 printk(KERN_ERR "initrd too large to handle, " 399 "disabling initrd\n"); 400 return; 401 } 402 403 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, 404 ramdisk_end); 405 406 407 if (ramdisk_end <= end_of_lowmem) { 408 /* All in lowmem, easy case */ 409 /* 410 * don't need to reserve again, already reserved early 411 * in i386_start_kernel 412 */ 413 initrd_start = ramdisk_image + PAGE_OFFSET; 414 initrd_end = initrd_start + ramdisk_size; 415 return; 416 } 417 418 relocate_initrd(); 419 420 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image); 421 } 422 #else 423 static void __init reserve_initrd(void) 424 { 425 } 426 #endif /* CONFIG_BLK_DEV_INITRD */ 427 428 static void __init parse_setup_data(void) 429 { 430 struct setup_data *data; 431 u64 pa_data; 432 433 if (boot_params.hdr.version < 0x0209) 434 return; 435 pa_data = boot_params.hdr.setup_data; 436 while (pa_data) { 437 u32 data_len, map_len; 438 439 map_len = max(PAGE_SIZE - (pa_data & ~PAGE_MASK), 440 (u64)sizeof(struct setup_data)); 441 data = early_memremap(pa_data, map_len); 442 data_len = data->len + sizeof(struct setup_data); 443 if (data_len > map_len) { 444 early_iounmap(data, map_len); 445 data = early_memremap(pa_data, data_len); 446 map_len = data_len; 447 } 448 449 switch (data->type) { 450 case SETUP_E820_EXT: 451 parse_e820_ext(data); 452 break; 453 case SETUP_DTB: 454 add_dtb(pa_data); 455 break; 456 default: 457 break; 458 } 459 pa_data = data->next; 460 early_iounmap(data, map_len); 461 } 462 } 463 464 static void __init e820_reserve_setup_data(void) 465 { 466 struct setup_data *data; 467 u64 pa_data; 468 int found = 0; 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 e820_update_range(pa_data, sizeof(*data)+data->len, 476 E820_RAM, E820_RESERVED_KERN); 477 found = 1; 478 pa_data = data->next; 479 early_iounmap(data, sizeof(*data)); 480 } 481 if (!found) 482 return; 483 484 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 485 memcpy(&e820_saved, &e820, sizeof(struct e820map)); 486 printk(KERN_INFO "extended physical RAM map:\n"); 487 e820_print_map("reserve setup_data"); 488 } 489 490 static void __init memblock_x86_reserve_range_setup_data(void) 491 { 492 struct setup_data *data; 493 u64 pa_data; 494 495 if (boot_params.hdr.version < 0x0209) 496 return; 497 pa_data = boot_params.hdr.setup_data; 498 while (pa_data) { 499 data = early_memremap(pa_data, sizeof(*data)); 500 memblock_reserve(pa_data, sizeof(*data) + data->len); 501 pa_data = data->next; 502 early_iounmap(data, sizeof(*data)); 503 } 504 } 505 506 /* 507 * --------- Crashkernel reservation ------------------------------ 508 */ 509 510 #ifdef CONFIG_KEXEC 511 512 static inline unsigned long long get_total_mem(void) 513 { 514 unsigned long long total; 515 516 total = max_pfn - min_low_pfn; 517 518 return total << PAGE_SHIFT; 519 } 520 521 /* 522 * Keep the crash kernel below this limit. On 32 bits earlier kernels 523 * would limit the kernel to the low 512 MiB due to mapping restrictions. 524 * On 64 bits, kexec-tools currently limits us to 896 MiB; increase this 525 * limit once kexec-tools are fixed. 526 */ 527 #ifdef CONFIG_X86_32 528 # define CRASH_KERNEL_ADDR_MAX (512 << 20) 529 #else 530 # define CRASH_KERNEL_ADDR_MAX (896 << 20) 531 #endif 532 533 static void __init reserve_crashkernel(void) 534 { 535 unsigned long long total_mem; 536 unsigned long long crash_size, crash_base; 537 int ret; 538 539 total_mem = get_total_mem(); 540 541 ret = parse_crashkernel(boot_command_line, total_mem, 542 &crash_size, &crash_base); 543 if (ret != 0 || crash_size <= 0) 544 return; 545 546 /* 0 means: find the address automatically */ 547 if (crash_base <= 0) { 548 const unsigned long long alignment = 16<<20; /* 16M */ 549 550 /* 551 * kexec want bzImage is below CRASH_KERNEL_ADDR_MAX 552 */ 553 crash_base = memblock_find_in_range(alignment, 554 CRASH_KERNEL_ADDR_MAX, crash_size, alignment); 555 556 if (!crash_base) { 557 pr_info("crashkernel reservation failed - No suitable area found.\n"); 558 return; 559 } 560 } else { 561 unsigned long long start; 562 563 start = memblock_find_in_range(crash_base, 564 crash_base + crash_size, crash_size, 1<<20); 565 if (start != crash_base) { 566 pr_info("crashkernel reservation failed - memory is in use.\n"); 567 return; 568 } 569 } 570 memblock_reserve(crash_base, crash_size); 571 572 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " 573 "for crashkernel (System RAM: %ldMB)\n", 574 (unsigned long)(crash_size >> 20), 575 (unsigned long)(crash_base >> 20), 576 (unsigned long)(total_mem >> 20)); 577 578 crashk_res.start = crash_base; 579 crashk_res.end = crash_base + crash_size - 1; 580 insert_resource(&iomem_resource, &crashk_res); 581 } 582 #else 583 static void __init reserve_crashkernel(void) 584 { 585 } 586 #endif 587 588 static struct resource standard_io_resources[] = { 589 { .name = "dma1", .start = 0x00, .end = 0x1f, 590 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 591 { .name = "pic1", .start = 0x20, .end = 0x21, 592 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 593 { .name = "timer0", .start = 0x40, .end = 0x43, 594 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 595 { .name = "timer1", .start = 0x50, .end = 0x53, 596 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 597 { .name = "keyboard", .start = 0x60, .end = 0x60, 598 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 599 { .name = "keyboard", .start = 0x64, .end = 0x64, 600 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 601 { .name = "dma page reg", .start = 0x80, .end = 0x8f, 602 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 603 { .name = "pic2", .start = 0xa0, .end = 0xa1, 604 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 605 { .name = "dma2", .start = 0xc0, .end = 0xdf, 606 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 607 { .name = "fpu", .start = 0xf0, .end = 0xff, 608 .flags = IORESOURCE_BUSY | IORESOURCE_IO } 609 }; 610 611 void __init reserve_standard_io_resources(void) 612 { 613 int i; 614 615 /* request I/O space for devices used on all i[345]86 PCs */ 616 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) 617 request_resource(&ioport_resource, &standard_io_resources[i]); 618 619 } 620 621 static __init void reserve_ibft_region(void) 622 { 623 unsigned long addr, size = 0; 624 625 addr = find_ibft_region(&size); 626 627 if (size) 628 memblock_reserve(addr, size); 629 } 630 631 static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10; 632 633 static void __init trim_bios_range(void) 634 { 635 /* 636 * A special case is the first 4Kb of memory; 637 * This is a BIOS owned area, not kernel ram, but generally 638 * not listed as such in the E820 table. 639 * 640 * This typically reserves additional memory (64KiB by default) 641 * since some BIOSes are known to corrupt low memory. See the 642 * Kconfig help text for X86_RESERVE_LOW. 643 */ 644 e820_update_range(0, ALIGN(reserve_low, PAGE_SIZE), 645 E820_RAM, E820_RESERVED); 646 647 /* 648 * special case: Some BIOSen report the PC BIOS 649 * area (640->1Mb) as ram even though it is not. 650 * take them out. 651 */ 652 e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1); 653 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 654 } 655 656 static int __init parse_reservelow(char *p) 657 { 658 unsigned long long size; 659 660 if (!p) 661 return -EINVAL; 662 663 size = memparse(p, &p); 664 665 if (size < 4096) 666 size = 4096; 667 668 if (size > 640*1024) 669 size = 640*1024; 670 671 reserve_low = size; 672 673 return 0; 674 } 675 676 early_param("reservelow", parse_reservelow); 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(); 696 697 /* 698 * copy kernel address range established so far and switch 699 * to the proper swapper page table 700 */ 701 clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY, 702 initial_page_table + KERNEL_PGD_BOUNDARY, 703 KERNEL_PGD_PTRS); 704 705 load_cr3(swapper_pg_dir); 706 __flush_tlb_all(); 707 #else 708 printk(KERN_INFO "Command line: %s\n", boot_command_line); 709 #endif 710 711 /* 712 * If we have OLPC OFW, we might end up relocating the fixmap due to 713 * reserve_top(), so do this before touching the ioremap area. 714 */ 715 olpc_ofw_detect(); 716 717 early_trap_init(); 718 early_cpu_init(); 719 early_ioremap_init(); 720 721 setup_olpc_ofw_pgd(); 722 723 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); 724 screen_info = boot_params.screen_info; 725 edid_info = boot_params.edid_info; 726 #ifdef CONFIG_X86_32 727 apm_info.bios = boot_params.apm_bios_info; 728 ist_info = boot_params.ist_info; 729 if (boot_params.sys_desc_table.length != 0) { 730 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); 731 machine_id = boot_params.sys_desc_table.table[0]; 732 machine_submodel_id = boot_params.sys_desc_table.table[1]; 733 BIOS_revision = boot_params.sys_desc_table.table[2]; 734 } 735 #endif 736 saved_video_mode = boot_params.hdr.vid_mode; 737 bootloader_type = boot_params.hdr.type_of_loader; 738 if ((bootloader_type >> 4) == 0xe) { 739 bootloader_type &= 0xf; 740 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4; 741 } 742 bootloader_version = bootloader_type & 0xf; 743 bootloader_version |= boot_params.hdr.ext_loader_ver << 4; 744 745 #ifdef CONFIG_BLK_DEV_RAM 746 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; 747 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); 748 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); 749 #endif 750 #ifdef CONFIG_EFI 751 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, 752 EFI_LOADER_SIGNATURE, 4)) { 753 efi_enabled = 1; 754 efi_memblock_x86_reserve_range(); 755 } 756 #endif 757 758 x86_init.oem.arch_setup(); 759 760 iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1; 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 cleanup_highmap(); 903 904 memblock.current_limit = get_max_mapped(); 905 memblock_x86_fill(); 906 907 /* 908 * The EFI specification says that boot service code won't be called 909 * after ExitBootServices(). This is, in fact, a lie. 910 */ 911 if (efi_enabled) 912 efi_reserve_boot_services(); 913 914 /* preallocate 4k for mptable mpc */ 915 early_reserve_e820_mpc_new(); 916 917 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION 918 setup_bios_corruption_check(); 919 #endif 920 921 printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n", 922 max_pfn_mapped<<PAGE_SHIFT); 923 924 setup_trampolines(); 925 926 init_gbpages(); 927 928 /* max_pfn_mapped is updated here */ 929 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); 930 max_pfn_mapped = max_low_pfn_mapped; 931 932 #ifdef CONFIG_X86_64 933 if (max_pfn > max_low_pfn) { 934 max_pfn_mapped = init_memory_mapping(1UL<<32, 935 max_pfn<<PAGE_SHIFT); 936 /* can we preseve max_low_pfn ?*/ 937 max_low_pfn = max_pfn; 938 } 939 #endif 940 memblock.current_limit = get_max_mapped(); 941 942 /* 943 * NOTE: On x86-32, only from this point on, fixmaps are ready for use. 944 */ 945 946 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT 947 if (init_ohci1394_dma_early) 948 init_ohci1394_dma_on_all_controllers(); 949 #endif 950 /* Allocate bigger log buffer */ 951 setup_log_buf(1); 952 953 reserve_initrd(); 954 955 reserve_crashkernel(); 956 957 vsmp_init(); 958 959 io_delay_init(); 960 961 /* 962 * Parse the ACPI tables for possible boot-time SMP configuration. 963 */ 964 acpi_boot_table_init(); 965 966 early_acpi_boot_init(); 967 968 initmem_init(); 969 memblock_find_dma_reserve(); 970 971 #ifdef CONFIG_KVM_CLOCK 972 kvmclock_init(); 973 #endif 974 975 x86_init.paging.pagetable_setup_start(swapper_pg_dir); 976 paging_init(); 977 x86_init.paging.pagetable_setup_done(swapper_pg_dir); 978 979 if (boot_cpu_data.cpuid_level >= 0) { 980 /* A CPU has %cr4 if and only if it has CPUID */ 981 mmu_cr4_features = read_cr4(); 982 } 983 984 #ifdef CONFIG_X86_32 985 /* sync back kernel address range */ 986 clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY, 987 swapper_pg_dir + KERNEL_PGD_BOUNDARY, 988 KERNEL_PGD_PTRS); 989 #endif 990 991 tboot_probe(); 992 993 #ifdef CONFIG_X86_64 994 map_vsyscall(); 995 #endif 996 997 generic_apic_probe(); 998 999 early_quirks(); 1000 1001 /* 1002 * Read APIC and some other early information from ACPI tables. 1003 */ 1004 acpi_boot_init(); 1005 sfi_init(); 1006 x86_dtb_init(); 1007 1008 /* 1009 * get boot-time SMP configuration: 1010 */ 1011 if (smp_found_config) 1012 get_smp_config(); 1013 1014 prefill_possible_map(); 1015 1016 init_cpu_to_node(); 1017 1018 init_apic_mappings(); 1019 ioapic_and_gsi_init(); 1020 1021 kvm_guest_init(); 1022 1023 e820_reserve_resources(); 1024 e820_mark_nosave_regions(max_low_pfn); 1025 1026 x86_init.resources.reserve_resources(); 1027 1028 e820_setup_gap(); 1029 1030 #ifdef CONFIG_VT 1031 #if defined(CONFIG_VGA_CONSOLE) 1032 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) 1033 conswitchp = &vga_con; 1034 #elif defined(CONFIG_DUMMY_CONSOLE) 1035 conswitchp = &dummy_con; 1036 #endif 1037 #endif 1038 x86_init.oem.banner(); 1039 1040 x86_init.timers.wallclock_init(); 1041 1042 x86_platform.wallclock_init(); 1043 1044 mcheck_init(); 1045 1046 arch_init_ideal_nops(); 1047 } 1048 1049 #ifdef CONFIG_X86_32 1050 1051 static struct resource video_ram_resource = { 1052 .name = "Video RAM area", 1053 .start = 0xa0000, 1054 .end = 0xbffff, 1055 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 1056 }; 1057 1058 void __init i386_reserve_resources(void) 1059 { 1060 request_resource(&iomem_resource, &video_ram_resource); 1061 reserve_standard_io_resources(); 1062 } 1063 1064 #endif /* CONFIG_X86_32 */ 1065