1 /* 2 * Copyright (C) 1995 Linus Torvalds 3 * 4 * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999 5 * 6 * Memory region support 7 * David Parsons <orc@pell.chi.il.us>, July-August 1999 8 * 9 * Added E820 sanitization routine (removes overlapping memory regions); 10 * Brian Moyle <bmoyle@mvista.com>, February 2001 11 * 12 * Moved CPU detection code to cpu/${cpu}.c 13 * Patrick Mochel <mochel@osdl.org>, March 2002 14 * 15 * Provisions for empty E820 memory regions (reported by certain BIOSes). 16 * Alex Achenbach <xela@slit.de>, December 2002. 17 * 18 */ 19 20 /* 21 * This file handles the architecture-dependent parts of initialization 22 */ 23 24 #include <linux/sched.h> 25 #include <linux/mm.h> 26 #include <linux/mmzone.h> 27 #include <linux/screen_info.h> 28 #include <linux/ioport.h> 29 #include <linux/acpi.h> 30 #include <linux/sfi.h> 31 #include <linux/apm_bios.h> 32 #include <linux/initrd.h> 33 #include <linux/bootmem.h> 34 #include <linux/memblock.h> 35 #include <linux/seq_file.h> 36 #include <linux/console.h> 37 #include <linux/mca.h> 38 #include <linux/root_dev.h> 39 #include <linux/highmem.h> 40 #include <linux/module.h> 41 #include <linux/efi.h> 42 #include <linux/init.h> 43 #include <linux/edd.h> 44 #include <linux/iscsi_ibft.h> 45 #include <linux/nodemask.h> 46 #include <linux/kexec.h> 47 #include <linux/dmi.h> 48 #include <linux/pfn.h> 49 #include <linux/pci.h> 50 #include <asm/pci-direct.h> 51 #include <linux/init_ohci1394_dma.h> 52 #include <linux/kvm_para.h> 53 54 #include <linux/errno.h> 55 #include <linux/kernel.h> 56 #include <linux/stddef.h> 57 #include <linux/unistd.h> 58 #include <linux/ptrace.h> 59 #include <linux/user.h> 60 #include <linux/delay.h> 61 62 #include <linux/kallsyms.h> 63 #include <linux/cpufreq.h> 64 #include <linux/dma-mapping.h> 65 #include <linux/ctype.h> 66 #include <linux/uaccess.h> 67 68 #include <linux/percpu.h> 69 #include <linux/crash_dump.h> 70 #include <linux/tboot.h> 71 72 #include <video/edid.h> 73 74 #include <asm/mtrr.h> 75 #include <asm/apic.h> 76 #include <asm/trampoline.h> 77 #include <asm/e820.h> 78 #include <asm/mpspec.h> 79 #include <asm/setup.h> 80 #include <asm/efi.h> 81 #include <asm/timer.h> 82 #include <asm/i8259.h> 83 #include <asm/sections.h> 84 #include <asm/dmi.h> 85 #include <asm/io_apic.h> 86 #include <asm/ist.h> 87 #include <asm/setup_arch.h> 88 #include <asm/bios_ebda.h> 89 #include <asm/cacheflush.h> 90 #include <asm/processor.h> 91 #include <asm/bugs.h> 92 93 #include <asm/vsyscall.h> 94 #include <asm/cpu.h> 95 #include <asm/desc.h> 96 #include <asm/dma.h> 97 #include <asm/iommu.h> 98 #include <asm/gart.h> 99 #include <asm/mmu_context.h> 100 #include <asm/proto.h> 101 102 #include <asm/paravirt.h> 103 #include <asm/hypervisor.h> 104 #include <asm/olpc_ofw.h> 105 106 #include <asm/percpu.h> 107 #include <asm/topology.h> 108 #include <asm/apicdef.h> 109 #include <asm/amd_nb.h> 110 #ifdef CONFIG_X86_64 111 #include <asm/numa_64.h> 112 #endif 113 #include <asm/mce.h> 114 #include <asm/alternative.h> 115 #include <asm/prom.h> 116 117 /* 118 * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries. 119 * The direct mapping extends to max_pfn_mapped, so that we can directly access 120 * apertures, ACPI and other tables without having to play with fixmaps. 121 */ 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 static void __init cleanup_highmap(void) 301 { 302 } 303 #endif 304 305 static void __init reserve_brk(void) 306 { 307 if (_brk_end > _brk_start) 308 memblock_reserve(__pa(_brk_start), 309 __pa(_brk_end) - __pa(_brk_start)); 310 311 /* Mark brk area as locked down and no longer taking any 312 new allocations */ 313 _brk_start = 0; 314 } 315 316 #ifdef CONFIG_BLK_DEV_INITRD 317 318 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) 319 static void __init relocate_initrd(void) 320 { 321 /* Assume only end is not page aligned */ 322 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 323 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 324 u64 area_size = PAGE_ALIGN(ramdisk_size); 325 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; 326 u64 ramdisk_here; 327 unsigned long slop, clen, mapaddr; 328 char *p, *q; 329 330 /* We need to move the initrd down into lowmem */ 331 ramdisk_here = memblock_find_in_range(0, end_of_lowmem, area_size, 332 PAGE_SIZE); 333 334 if (!ramdisk_here) 335 panic("Cannot find place for new RAMDISK of size %lld\n", 336 ramdisk_size); 337 338 /* Note: this includes all the lowmem currently occupied by 339 the initrd, we rely on that fact to keep the data intact. */ 340 memblock_reserve(ramdisk_here, area_size); 341 initrd_start = ramdisk_here + PAGE_OFFSET; 342 initrd_end = initrd_start + ramdisk_size; 343 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", 344 ramdisk_here, ramdisk_here + ramdisk_size); 345 346 q = (char *)initrd_start; 347 348 /* Copy any lowmem portion of the initrd */ 349 if (ramdisk_image < end_of_lowmem) { 350 clen = end_of_lowmem - ramdisk_image; 351 p = (char *)__va(ramdisk_image); 352 memcpy(q, p, clen); 353 q += clen; 354 ramdisk_image += clen; 355 ramdisk_size -= clen; 356 } 357 358 /* Copy the highmem portion of the initrd */ 359 while (ramdisk_size) { 360 slop = ramdisk_image & ~PAGE_MASK; 361 clen = ramdisk_size; 362 if (clen > MAX_MAP_CHUNK-slop) 363 clen = MAX_MAP_CHUNK-slop; 364 mapaddr = ramdisk_image & PAGE_MASK; 365 p = early_memremap(mapaddr, clen+slop); 366 memcpy(q, p+slop, clen); 367 early_iounmap(p, clen+slop); 368 q += clen; 369 ramdisk_image += clen; 370 ramdisk_size -= clen; 371 } 372 /* high pages is not converted by early_res_to_bootmem */ 373 ramdisk_image = boot_params.hdr.ramdisk_image; 374 ramdisk_size = boot_params.hdr.ramdisk_size; 375 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" 376 " %08llx - %08llx\n", 377 ramdisk_image, ramdisk_image + ramdisk_size - 1, 378 ramdisk_here, ramdisk_here + ramdisk_size - 1); 379 } 380 381 static void __init reserve_initrd(void) 382 { 383 /* Assume only end is not page aligned */ 384 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 385 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 386 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); 387 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT; 388 389 if (!boot_params.hdr.type_of_loader || 390 !ramdisk_image || !ramdisk_size) 391 return; /* No initrd provided by bootloader */ 392 393 initrd_start = 0; 394 395 if (ramdisk_size >= (end_of_lowmem>>1)) { 396 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image); 397 printk(KERN_ERR "initrd too large to handle, " 398 "disabling initrd\n"); 399 return; 400 } 401 402 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, 403 ramdisk_end); 404 405 406 if (ramdisk_end <= end_of_lowmem) { 407 /* All in lowmem, easy case */ 408 /* 409 * don't need to reserve again, already reserved early 410 * in i386_start_kernel 411 */ 412 initrd_start = ramdisk_image + PAGE_OFFSET; 413 initrd_end = initrd_start + ramdisk_size; 414 return; 415 } 416 417 relocate_initrd(); 418 419 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image); 420 } 421 #else 422 static void __init reserve_initrd(void) 423 { 424 } 425 #endif /* CONFIG_BLK_DEV_INITRD */ 426 427 static void __init parse_setup_data(void) 428 { 429 struct setup_data *data; 430 u64 pa_data; 431 432 if (boot_params.hdr.version < 0x0209) 433 return; 434 pa_data = boot_params.hdr.setup_data; 435 while (pa_data) { 436 u32 data_len, map_len; 437 438 map_len = max(PAGE_SIZE - (pa_data & ~PAGE_MASK), 439 (u64)sizeof(struct setup_data)); 440 data = early_memremap(pa_data, map_len); 441 data_len = data->len + sizeof(struct setup_data); 442 if (data_len > map_len) { 443 early_iounmap(data, map_len); 444 data = early_memremap(pa_data, data_len); 445 map_len = data_len; 446 } 447 448 switch (data->type) { 449 case SETUP_E820_EXT: 450 parse_e820_ext(data); 451 break; 452 case SETUP_DTB: 453 add_dtb(pa_data); 454 break; 455 default: 456 break; 457 } 458 pa_data = data->next; 459 early_iounmap(data, map_len); 460 } 461 } 462 463 static void __init e820_reserve_setup_data(void) 464 { 465 struct setup_data *data; 466 u64 pa_data; 467 int found = 0; 468 469 if (boot_params.hdr.version < 0x0209) 470 return; 471 pa_data = boot_params.hdr.setup_data; 472 while (pa_data) { 473 data = early_memremap(pa_data, sizeof(*data)); 474 e820_update_range(pa_data, sizeof(*data)+data->len, 475 E820_RAM, E820_RESERVED_KERN); 476 found = 1; 477 pa_data = data->next; 478 early_iounmap(data, sizeof(*data)); 479 } 480 if (!found) 481 return; 482 483 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 484 memcpy(&e820_saved, &e820, sizeof(struct e820map)); 485 printk(KERN_INFO "extended physical RAM map:\n"); 486 e820_print_map("reserve setup_data"); 487 } 488 489 static void __init memblock_x86_reserve_range_setup_data(void) 490 { 491 struct setup_data *data; 492 u64 pa_data; 493 494 if (boot_params.hdr.version < 0x0209) 495 return; 496 pa_data = boot_params.hdr.setup_data; 497 while (pa_data) { 498 data = early_memremap(pa_data, sizeof(*data)); 499 memblock_reserve(pa_data, sizeof(*data) + data->len); 500 pa_data = data->next; 501 early_iounmap(data, sizeof(*data)); 502 } 503 } 504 505 /* 506 * --------- Crashkernel reservation ------------------------------ 507 */ 508 509 #ifdef CONFIG_KEXEC 510 511 static inline unsigned long long get_total_mem(void) 512 { 513 unsigned long long total; 514 515 total = max_pfn - min_low_pfn; 516 517 return total << PAGE_SHIFT; 518 } 519 520 /* 521 * Keep the crash kernel below this limit. On 32 bits earlier kernels 522 * would limit the kernel to the low 512 MiB due to mapping restrictions. 523 * On 64 bits, kexec-tools currently limits us to 896 MiB; increase this 524 * limit once kexec-tools are fixed. 525 */ 526 #ifdef CONFIG_X86_32 527 # define CRASH_KERNEL_ADDR_MAX (512 << 20) 528 #else 529 # define CRASH_KERNEL_ADDR_MAX (896 << 20) 530 #endif 531 532 static void __init reserve_crashkernel(void) 533 { 534 unsigned long long total_mem; 535 unsigned long long crash_size, crash_base; 536 int ret; 537 538 total_mem = get_total_mem(); 539 540 ret = parse_crashkernel(boot_command_line, total_mem, 541 &crash_size, &crash_base); 542 if (ret != 0 || crash_size <= 0) 543 return; 544 545 /* 0 means: find the address automatically */ 546 if (crash_base <= 0) { 547 const unsigned long long alignment = 16<<20; /* 16M */ 548 549 /* 550 * kexec want bzImage is below CRASH_KERNEL_ADDR_MAX 551 */ 552 crash_base = memblock_find_in_range(alignment, 553 CRASH_KERNEL_ADDR_MAX, crash_size, alignment); 554 555 if (!crash_base) { 556 pr_info("crashkernel reservation failed - No suitable area found.\n"); 557 return; 558 } 559 } else { 560 unsigned long long start; 561 562 start = memblock_find_in_range(crash_base, 563 crash_base + crash_size, crash_size, 1<<20); 564 if (start != crash_base) { 565 pr_info("crashkernel reservation failed - memory is in use.\n"); 566 return; 567 } 568 } 569 memblock_reserve(crash_base, crash_size); 570 571 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " 572 "for crashkernel (System RAM: %ldMB)\n", 573 (unsigned long)(crash_size >> 20), 574 (unsigned long)(crash_base >> 20), 575 (unsigned long)(total_mem >> 20)); 576 577 crashk_res.start = crash_base; 578 crashk_res.end = crash_base + crash_size - 1; 579 insert_resource(&iomem_resource, &crashk_res); 580 } 581 #else 582 static void __init reserve_crashkernel(void) 583 { 584 } 585 #endif 586 587 static struct resource standard_io_resources[] = { 588 { .name = "dma1", .start = 0x00, .end = 0x1f, 589 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 590 { .name = "pic1", .start = 0x20, .end = 0x21, 591 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 592 { .name = "timer0", .start = 0x40, .end = 0x43, 593 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 594 { .name = "timer1", .start = 0x50, .end = 0x53, 595 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 596 { .name = "keyboard", .start = 0x60, .end = 0x60, 597 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 598 { .name = "keyboard", .start = 0x64, .end = 0x64, 599 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 600 { .name = "dma page reg", .start = 0x80, .end = 0x8f, 601 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 602 { .name = "pic2", .start = 0xa0, .end = 0xa1, 603 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 604 { .name = "dma2", .start = 0xc0, .end = 0xdf, 605 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 606 { .name = "fpu", .start = 0xf0, .end = 0xff, 607 .flags = IORESOURCE_BUSY | IORESOURCE_IO } 608 }; 609 610 void __init reserve_standard_io_resources(void) 611 { 612 int i; 613 614 /* request I/O space for devices used on all i[345]86 PCs */ 615 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) 616 request_resource(&ioport_resource, &standard_io_resources[i]); 617 618 } 619 620 static __init void reserve_ibft_region(void) 621 { 622 unsigned long addr, size = 0; 623 624 addr = find_ibft_region(&size); 625 626 if (size) 627 memblock_reserve(addr, size); 628 } 629 630 static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10; 631 632 static void __init trim_bios_range(void) 633 { 634 /* 635 * A special case is the first 4Kb of memory; 636 * This is a BIOS owned area, not kernel ram, but generally 637 * not listed as such in the E820 table. 638 * 639 * This typically reserves additional memory (64KiB by default) 640 * since some BIOSes are known to corrupt low memory. See the 641 * Kconfig help text for X86_RESERVE_LOW. 642 */ 643 e820_update_range(0, ALIGN(reserve_low, PAGE_SIZE), 644 E820_RAM, E820_RESERVED); 645 646 /* 647 * special case: Some BIOSen report the PC BIOS 648 * area (640->1Mb) as ram even though it is not. 649 * take them out. 650 */ 651 e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1); 652 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 653 } 654 655 static int __init parse_reservelow(char *p) 656 { 657 unsigned long long size; 658 659 if (!p) 660 return -EINVAL; 661 662 size = memparse(p, &p); 663 664 if (size < 4096) 665 size = 4096; 666 667 if (size > 640*1024) 668 size = 640*1024; 669 670 reserve_low = size; 671 672 return 0; 673 } 674 675 early_param("reservelow", parse_reservelow); 676 677 /* 678 * Determine if we were loaded by an EFI loader. If so, then we have also been 679 * passed the efi memmap, systab, etc., so we should use these data structures 680 * for initialization. Note, the efi init code path is determined by the 681 * global efi_enabled. This allows the same kernel image to be used on existing 682 * systems (with a traditional BIOS) as well as on EFI systems. 683 */ 684 /* 685 * setup_arch - architecture-specific boot-time initializations 686 * 687 * Note: On x86_64, fixmaps are ready for use even before this is called. 688 */ 689 690 void __init setup_arch(char **cmdline_p) 691 { 692 #ifdef CONFIG_X86_32 693 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); 694 visws_early_detect(); 695 696 /* 697 * copy kernel address range established so far and switch 698 * to the proper swapper page table 699 */ 700 clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY, 701 initial_page_table + KERNEL_PGD_BOUNDARY, 702 KERNEL_PGD_PTRS); 703 704 load_cr3(swapper_pg_dir); 705 __flush_tlb_all(); 706 #else 707 printk(KERN_INFO "Command line: %s\n", boot_command_line); 708 #endif 709 710 /* 711 * If we have OLPC OFW, we might end up relocating the fixmap due to 712 * reserve_top(), so do this before touching the ioremap area. 713 */ 714 olpc_ofw_detect(); 715 716 early_trap_init(); 717 early_cpu_init(); 718 early_ioremap_init(); 719 720 setup_olpc_ofw_pgd(); 721 722 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); 723 screen_info = boot_params.screen_info; 724 edid_info = boot_params.edid_info; 725 #ifdef CONFIG_X86_32 726 apm_info.bios = boot_params.apm_bios_info; 727 ist_info = boot_params.ist_info; 728 if (boot_params.sys_desc_table.length != 0) { 729 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); 730 machine_id = boot_params.sys_desc_table.table[0]; 731 machine_submodel_id = boot_params.sys_desc_table.table[1]; 732 BIOS_revision = boot_params.sys_desc_table.table[2]; 733 } 734 #endif 735 saved_video_mode = boot_params.hdr.vid_mode; 736 bootloader_type = boot_params.hdr.type_of_loader; 737 if ((bootloader_type >> 4) == 0xe) { 738 bootloader_type &= 0xf; 739 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4; 740 } 741 bootloader_version = bootloader_type & 0xf; 742 bootloader_version |= boot_params.hdr.ext_loader_ver << 4; 743 744 #ifdef CONFIG_BLK_DEV_RAM 745 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; 746 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); 747 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); 748 #endif 749 #ifdef CONFIG_EFI 750 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, 751 "EL32", 4)) { 752 efi_enabled = 1; 753 efi_64bit = false; 754 } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, 755 "EL64", 4)) { 756 efi_enabled = 1; 757 efi_64bit = true; 758 } 759 if (efi_enabled && efi_memblock_x86_reserve_range()) 760 efi_enabled = 0; 761 #endif 762 763 x86_init.oem.arch_setup(); 764 765 iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1; 766 setup_memory_map(); 767 parse_setup_data(); 768 /* update the e820_saved too */ 769 e820_reserve_setup_data(); 770 771 copy_edd(); 772 773 if (!boot_params.hdr.root_flags) 774 root_mountflags &= ~MS_RDONLY; 775 init_mm.start_code = (unsigned long) _text; 776 init_mm.end_code = (unsigned long) _etext; 777 init_mm.end_data = (unsigned long) _edata; 778 init_mm.brk = _brk_end; 779 780 code_resource.start = virt_to_phys(_text); 781 code_resource.end = virt_to_phys(_etext)-1; 782 data_resource.start = virt_to_phys(_etext); 783 data_resource.end = virt_to_phys(_edata)-1; 784 bss_resource.start = virt_to_phys(&__bss_start); 785 bss_resource.end = virt_to_phys(&__bss_stop)-1; 786 787 #ifdef CONFIG_CMDLINE_BOOL 788 #ifdef CONFIG_CMDLINE_OVERRIDE 789 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); 790 #else 791 if (builtin_cmdline[0]) { 792 /* append boot loader cmdline to builtin */ 793 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); 794 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); 795 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); 796 } 797 #endif 798 #endif 799 800 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); 801 *cmdline_p = command_line; 802 803 /* 804 * x86_configure_nx() is called before parse_early_param() to detect 805 * whether hardware doesn't support NX (so that the early EHCI debug 806 * console setup can safely call set_fixmap()). It may then be called 807 * again from within noexec_setup() during parsing early parameters 808 * to honor the respective command line option. 809 */ 810 x86_configure_nx(); 811 812 parse_early_param(); 813 814 x86_report_nx(); 815 816 /* after early param, so could get panic from serial */ 817 memblock_x86_reserve_range_setup_data(); 818 819 if (acpi_mps_check()) { 820 #ifdef CONFIG_X86_LOCAL_APIC 821 disable_apic = 1; 822 #endif 823 setup_clear_cpu_cap(X86_FEATURE_APIC); 824 } 825 826 #ifdef CONFIG_PCI 827 if (pci_early_dump_regs) 828 early_dump_pci_devices(); 829 #endif 830 831 finish_e820_parsing(); 832 833 if (efi_enabled) 834 efi_init(); 835 836 dmi_scan_machine(); 837 838 /* 839 * VMware detection requires dmi to be available, so this 840 * needs to be done after dmi_scan_machine, for the BP. 841 */ 842 init_hypervisor_platform(); 843 844 x86_init.resources.probe_roms(); 845 846 /* after parse_early_param, so could debug it */ 847 insert_resource(&iomem_resource, &code_resource); 848 insert_resource(&iomem_resource, &data_resource); 849 insert_resource(&iomem_resource, &bss_resource); 850 851 trim_bios_range(); 852 #ifdef CONFIG_X86_32 853 if (ppro_with_ram_bug()) { 854 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, 855 E820_RESERVED); 856 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 857 printk(KERN_INFO "fixed physical RAM map:\n"); 858 e820_print_map("bad_ppro"); 859 } 860 #else 861 early_gart_iommu_check(); 862 #endif 863 864 /* 865 * partially used pages are not usable - thus 866 * we are rounding upwards: 867 */ 868 max_pfn = e820_end_of_ram_pfn(); 869 870 /* update e820 for memory not covered by WB MTRRs */ 871 mtrr_bp_init(); 872 if (mtrr_trim_uncached_memory(max_pfn)) 873 max_pfn = e820_end_of_ram_pfn(); 874 875 #ifdef CONFIG_X86_32 876 /* max_low_pfn get updated here */ 877 find_low_pfn_range(); 878 #else 879 num_physpages = max_pfn; 880 881 check_x2apic(); 882 883 /* How many end-of-memory variables you have, grandma! */ 884 /* need this before calling reserve_initrd */ 885 if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) 886 max_low_pfn = e820_end_of_low_ram_pfn(); 887 else 888 max_low_pfn = max_pfn; 889 890 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; 891 #endif 892 893 /* 894 * Find and reserve possible boot-time SMP configuration: 895 */ 896 find_smp_config(); 897 898 reserve_ibft_region(); 899 900 /* 901 * Need to conclude brk, before memblock_x86_fill() 902 * it could use memblock_find_in_range, could overlap with 903 * brk area. 904 */ 905 reserve_brk(); 906 907 cleanup_highmap(); 908 909 memblock.current_limit = get_max_mapped(); 910 memblock_x86_fill(); 911 912 /* 913 * The EFI specification says that boot service code won't be called 914 * after ExitBootServices(). This is, in fact, a lie. 915 */ 916 if (efi_enabled) 917 efi_reserve_boot_services(); 918 919 /* preallocate 4k for mptable mpc */ 920 early_reserve_e820_mpc_new(); 921 922 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION 923 setup_bios_corruption_check(); 924 #endif 925 926 printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n", 927 max_pfn_mapped<<PAGE_SHIFT); 928 929 setup_trampolines(); 930 931 init_gbpages(); 932 933 /* max_pfn_mapped is updated here */ 934 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); 935 max_pfn_mapped = max_low_pfn_mapped; 936 937 #ifdef CONFIG_X86_64 938 if (max_pfn > max_low_pfn) { 939 max_pfn_mapped = init_memory_mapping(1UL<<32, 940 max_pfn<<PAGE_SHIFT); 941 /* can we preseve max_low_pfn ?*/ 942 max_low_pfn = max_pfn; 943 } 944 #endif 945 memblock.current_limit = get_max_mapped(); 946 947 /* 948 * NOTE: On x86-32, only from this point on, fixmaps are ready for use. 949 */ 950 951 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT 952 if (init_ohci1394_dma_early) 953 init_ohci1394_dma_on_all_controllers(); 954 #endif 955 /* Allocate bigger log buffer */ 956 setup_log_buf(1); 957 958 reserve_initrd(); 959 960 reserve_crashkernel(); 961 962 vsmp_init(); 963 964 io_delay_init(); 965 966 /* 967 * Parse the ACPI tables for possible boot-time SMP configuration. 968 */ 969 acpi_boot_table_init(); 970 971 early_acpi_boot_init(); 972 973 initmem_init(); 974 memblock_find_dma_reserve(); 975 976 #ifdef CONFIG_KVM_CLOCK 977 kvmclock_init(); 978 #endif 979 980 x86_init.paging.pagetable_setup_start(swapper_pg_dir); 981 paging_init(); 982 x86_init.paging.pagetable_setup_done(swapper_pg_dir); 983 984 if (boot_cpu_data.cpuid_level >= 0) { 985 /* A CPU has %cr4 if and only if it has CPUID */ 986 mmu_cr4_features = read_cr4(); 987 } 988 989 #ifdef CONFIG_X86_32 990 /* sync back kernel address range */ 991 clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY, 992 swapper_pg_dir + KERNEL_PGD_BOUNDARY, 993 KERNEL_PGD_PTRS); 994 #endif 995 996 tboot_probe(); 997 998 #ifdef CONFIG_X86_64 999 map_vsyscall(); 1000 #endif 1001 1002 generic_apic_probe(); 1003 1004 early_quirks(); 1005 1006 /* 1007 * Read APIC and some other early information from ACPI tables. 1008 */ 1009 acpi_boot_init(); 1010 sfi_init(); 1011 x86_dtb_init(); 1012 1013 /* 1014 * get boot-time SMP configuration: 1015 */ 1016 if (smp_found_config) 1017 get_smp_config(); 1018 1019 prefill_possible_map(); 1020 1021 init_cpu_to_node(); 1022 1023 init_apic_mappings(); 1024 ioapic_and_gsi_init(); 1025 1026 kvm_guest_init(); 1027 1028 e820_reserve_resources(); 1029 e820_mark_nosave_regions(max_low_pfn); 1030 1031 x86_init.resources.reserve_resources(); 1032 1033 e820_setup_gap(); 1034 1035 #ifdef CONFIG_VT 1036 #if defined(CONFIG_VGA_CONSOLE) 1037 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) 1038 conswitchp = &vga_con; 1039 #elif defined(CONFIG_DUMMY_CONSOLE) 1040 conswitchp = &dummy_con; 1041 #endif 1042 #endif 1043 x86_init.oem.banner(); 1044 1045 x86_init.timers.wallclock_init(); 1046 1047 x86_platform.wallclock_init(); 1048 1049 mcheck_init(); 1050 1051 arch_init_ideal_nops(); 1052 } 1053 1054 #ifdef CONFIG_X86_32 1055 1056 static struct resource video_ram_resource = { 1057 .name = "Video RAM area", 1058 .start = 0xa0000, 1059 .end = 0xbffff, 1060 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 1061 }; 1062 1063 void __init i386_reserve_resources(void) 1064 { 1065 request_resource(&iomem_resource, &video_ram_resource); 1066 reserve_standard_io_resources(); 1067 } 1068 1069 #endif /* CONFIG_X86_32 */ 1070