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 70 #include <video/edid.h> 71 72 #include <asm/mtrr.h> 73 #include <asm/apic.h> 74 #include <asm/e820.h> 75 #include <asm/mpspec.h> 76 #include <asm/setup.h> 77 #include <asm/efi.h> 78 #include <asm/timer.h> 79 #include <asm/i8259.h> 80 #include <asm/sections.h> 81 #include <asm/dmi.h> 82 #include <asm/io_apic.h> 83 #include <asm/ist.h> 84 #include <asm/vmi.h> 85 #include <asm/setup_arch.h> 86 #include <asm/bios_ebda.h> 87 #include <asm/cacheflush.h> 88 #include <asm/processor.h> 89 #include <asm/bugs.h> 90 91 #include <asm/system.h> 92 #include <asm/vsyscall.h> 93 #include <asm/cpu.h> 94 #include <asm/desc.h> 95 #include <asm/dma.h> 96 #include <asm/iommu.h> 97 #include <asm/gart.h> 98 #include <asm/mmu_context.h> 99 #include <asm/proto.h> 100 101 #include <asm/paravirt.h> 102 #include <asm/hypervisor.h> 103 104 #include <asm/percpu.h> 105 #include <asm/topology.h> 106 #include <asm/apicdef.h> 107 #ifdef CONFIG_X86_64 108 #include <asm/numa_64.h> 109 #endif 110 111 #ifndef ARCH_SETUP 112 #define ARCH_SETUP 113 #endif 114 115 RESERVE_BRK(dmi_alloc, 65536); 116 117 unsigned int boot_cpu_id __read_mostly; 118 119 static __initdata unsigned long _brk_start = (unsigned long)__brk_base; 120 unsigned long _brk_end = (unsigned long)__brk_base; 121 122 #ifdef CONFIG_X86_64 123 int default_cpu_present_to_apicid(int mps_cpu) 124 { 125 return __default_cpu_present_to_apicid(mps_cpu); 126 } 127 128 int default_check_phys_apicid_present(int boot_cpu_physical_apicid) 129 { 130 return __default_check_phys_apicid_present(boot_cpu_physical_apicid); 131 } 132 #endif 133 134 #ifndef CONFIG_DEBUG_BOOT_PARAMS 135 struct boot_params __initdata boot_params; 136 #else 137 struct boot_params boot_params; 138 #endif 139 140 /* 141 * Machine setup.. 142 */ 143 static struct resource data_resource = { 144 .name = "Kernel data", 145 .start = 0, 146 .end = 0, 147 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 148 }; 149 150 static struct resource code_resource = { 151 .name = "Kernel code", 152 .start = 0, 153 .end = 0, 154 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 155 }; 156 157 static struct resource bss_resource = { 158 .name = "Kernel bss", 159 .start = 0, 160 .end = 0, 161 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 162 }; 163 164 165 #ifdef CONFIG_X86_32 166 static struct resource video_ram_resource = { 167 .name = "Video RAM area", 168 .start = 0xa0000, 169 .end = 0xbffff, 170 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 171 }; 172 173 /* cpu data as detected by the assembly code in head.S */ 174 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; 175 /* common cpu data for all cpus */ 176 struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; 177 EXPORT_SYMBOL(boot_cpu_data); 178 static void set_mca_bus(int x) 179 { 180 #ifdef CONFIG_MCA 181 MCA_bus = x; 182 #endif 183 } 184 185 unsigned int def_to_bigsmp; 186 187 /* for MCA, but anyone else can use it if they want */ 188 unsigned int machine_id; 189 unsigned int machine_submodel_id; 190 unsigned int BIOS_revision; 191 192 struct apm_info apm_info; 193 EXPORT_SYMBOL(apm_info); 194 195 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ 196 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) 197 struct ist_info ist_info; 198 EXPORT_SYMBOL(ist_info); 199 #else 200 struct ist_info ist_info; 201 #endif 202 203 #else 204 struct cpuinfo_x86 boot_cpu_data __read_mostly = { 205 .x86_phys_bits = MAX_PHYSMEM_BITS, 206 }; 207 EXPORT_SYMBOL(boot_cpu_data); 208 #endif 209 210 211 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) 212 unsigned long mmu_cr4_features; 213 #else 214 unsigned long mmu_cr4_features = X86_CR4_PAE; 215 #endif 216 217 /* Boot loader ID as an integer, for the benefit of proc_dointvec */ 218 int bootloader_type; 219 220 /* 221 * Setup options 222 */ 223 struct screen_info screen_info; 224 EXPORT_SYMBOL(screen_info); 225 struct edid_info edid_info; 226 EXPORT_SYMBOL_GPL(edid_info); 227 228 extern int root_mountflags; 229 230 unsigned long saved_video_mode; 231 232 #define RAMDISK_IMAGE_START_MASK 0x07FF 233 #define RAMDISK_PROMPT_FLAG 0x8000 234 #define RAMDISK_LOAD_FLAG 0x4000 235 236 static char __initdata command_line[COMMAND_LINE_SIZE]; 237 #ifdef CONFIG_CMDLINE_BOOL 238 static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; 239 #endif 240 241 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) 242 struct edd edd; 243 #ifdef CONFIG_EDD_MODULE 244 EXPORT_SYMBOL(edd); 245 #endif 246 /** 247 * copy_edd() - Copy the BIOS EDD information 248 * from boot_params into a safe place. 249 * 250 */ 251 static inline void copy_edd(void) 252 { 253 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, 254 sizeof(edd.mbr_signature)); 255 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); 256 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; 257 edd.edd_info_nr = boot_params.eddbuf_entries; 258 } 259 #else 260 static inline void copy_edd(void) 261 { 262 } 263 #endif 264 265 void * __init extend_brk(size_t size, size_t align) 266 { 267 size_t mask = align - 1; 268 void *ret; 269 270 BUG_ON(_brk_start == 0); 271 BUG_ON(align & mask); 272 273 _brk_end = (_brk_end + mask) & ~mask; 274 BUG_ON((char *)(_brk_end + size) > __brk_limit); 275 276 ret = (void *)_brk_end; 277 _brk_end += size; 278 279 memset(ret, 0, size); 280 281 return ret; 282 } 283 284 static void __init reserve_brk(void) 285 { 286 if (_brk_end > _brk_start) 287 reserve_early(__pa(_brk_start), __pa(_brk_end), "BRK"); 288 289 /* Mark brk area as locked down and no longer taking any 290 new allocations */ 291 _brk_start = 0; 292 } 293 294 #ifdef CONFIG_BLK_DEV_INITRD 295 296 #ifdef CONFIG_X86_32 297 298 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) 299 static void __init relocate_initrd(void) 300 { 301 302 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 303 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 304 u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; 305 u64 ramdisk_here; 306 unsigned long slop, clen, mapaddr; 307 char *p, *q; 308 309 /* We need to move the initrd down into lowmem */ 310 ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size, 311 PAGE_SIZE); 312 313 if (ramdisk_here == -1ULL) 314 panic("Cannot find place for new RAMDISK of size %lld\n", 315 ramdisk_size); 316 317 /* Note: this includes all the lowmem currently occupied by 318 the initrd, we rely on that fact to keep the data intact. */ 319 reserve_early(ramdisk_here, ramdisk_here + ramdisk_size, 320 "NEW RAMDISK"); 321 initrd_start = ramdisk_here + PAGE_OFFSET; 322 initrd_end = initrd_start + ramdisk_size; 323 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", 324 ramdisk_here, ramdisk_here + ramdisk_size); 325 326 q = (char *)initrd_start; 327 328 /* Copy any lowmem portion of the initrd */ 329 if (ramdisk_image < end_of_lowmem) { 330 clen = end_of_lowmem - ramdisk_image; 331 p = (char *)__va(ramdisk_image); 332 memcpy(q, p, clen); 333 q += clen; 334 ramdisk_image += clen; 335 ramdisk_size -= clen; 336 } 337 338 /* Copy the highmem portion of the initrd */ 339 while (ramdisk_size) { 340 slop = ramdisk_image & ~PAGE_MASK; 341 clen = ramdisk_size; 342 if (clen > MAX_MAP_CHUNK-slop) 343 clen = MAX_MAP_CHUNK-slop; 344 mapaddr = ramdisk_image & PAGE_MASK; 345 p = early_memremap(mapaddr, clen+slop); 346 memcpy(q, p+slop, clen); 347 early_iounmap(p, clen+slop); 348 q += clen; 349 ramdisk_image += clen; 350 ramdisk_size -= clen; 351 } 352 /* high pages is not converted by early_res_to_bootmem */ 353 ramdisk_image = boot_params.hdr.ramdisk_image; 354 ramdisk_size = boot_params.hdr.ramdisk_size; 355 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" 356 " %08llx - %08llx\n", 357 ramdisk_image, ramdisk_image + ramdisk_size - 1, 358 ramdisk_here, ramdisk_here + ramdisk_size - 1); 359 } 360 #endif 361 362 static void __init reserve_initrd(void) 363 { 364 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 365 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 366 u64 ramdisk_end = ramdisk_image + ramdisk_size; 367 u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; 368 369 if (!boot_params.hdr.type_of_loader || 370 !ramdisk_image || !ramdisk_size) 371 return; /* No initrd provided by bootloader */ 372 373 initrd_start = 0; 374 375 if (ramdisk_size >= (end_of_lowmem>>1)) { 376 free_early(ramdisk_image, ramdisk_end); 377 printk(KERN_ERR "initrd too large to handle, " 378 "disabling initrd\n"); 379 return; 380 } 381 382 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, 383 ramdisk_end); 384 385 386 if (ramdisk_end <= end_of_lowmem) { 387 /* All in lowmem, easy case */ 388 /* 389 * don't need to reserve again, already reserved early 390 * in i386_start_kernel 391 */ 392 initrd_start = ramdisk_image + PAGE_OFFSET; 393 initrd_end = initrd_start + ramdisk_size; 394 return; 395 } 396 397 #ifdef CONFIG_X86_32 398 relocate_initrd(); 399 #else 400 printk(KERN_ERR "initrd extends beyond end of memory " 401 "(0x%08llx > 0x%08llx)\ndisabling initrd\n", 402 ramdisk_end, end_of_lowmem); 403 initrd_start = 0; 404 #endif 405 free_early(ramdisk_image, ramdisk_end); 406 } 407 #else 408 static void __init reserve_initrd(void) 409 { 410 } 411 #endif /* CONFIG_BLK_DEV_INITRD */ 412 413 static void __init parse_setup_data(void) 414 { 415 struct setup_data *data; 416 u64 pa_data; 417 418 if (boot_params.hdr.version < 0x0209) 419 return; 420 pa_data = boot_params.hdr.setup_data; 421 while (pa_data) { 422 data = early_memremap(pa_data, PAGE_SIZE); 423 switch (data->type) { 424 case SETUP_E820_EXT: 425 parse_e820_ext(data, pa_data); 426 break; 427 default: 428 break; 429 } 430 pa_data = data->next; 431 early_iounmap(data, PAGE_SIZE); 432 } 433 } 434 435 static void __init e820_reserve_setup_data(void) 436 { 437 struct setup_data *data; 438 u64 pa_data; 439 int found = 0; 440 441 if (boot_params.hdr.version < 0x0209) 442 return; 443 pa_data = boot_params.hdr.setup_data; 444 while (pa_data) { 445 data = early_memremap(pa_data, sizeof(*data)); 446 e820_update_range(pa_data, sizeof(*data)+data->len, 447 E820_RAM, E820_RESERVED_KERN); 448 found = 1; 449 pa_data = data->next; 450 early_iounmap(data, sizeof(*data)); 451 } 452 if (!found) 453 return; 454 455 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 456 memcpy(&e820_saved, &e820, sizeof(struct e820map)); 457 printk(KERN_INFO "extended physical RAM map:\n"); 458 e820_print_map("reserve setup_data"); 459 } 460 461 static void __init reserve_early_setup_data(void) 462 { 463 struct setup_data *data; 464 u64 pa_data; 465 char buf[32]; 466 467 if (boot_params.hdr.version < 0x0209) 468 return; 469 pa_data = boot_params.hdr.setup_data; 470 while (pa_data) { 471 data = early_memremap(pa_data, sizeof(*data)); 472 sprintf(buf, "setup data %x", data->type); 473 reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf); 474 pa_data = data->next; 475 early_iounmap(data, sizeof(*data)); 476 } 477 } 478 479 /* 480 * --------- Crashkernel reservation ------------------------------ 481 */ 482 483 #ifdef CONFIG_KEXEC 484 485 /** 486 * Reserve @size bytes of crashkernel memory at any suitable offset. 487 * 488 * @size: Size of the crashkernel memory to reserve. 489 * Returns the base address on success, and -1ULL on failure. 490 */ 491 static 492 unsigned long long __init find_and_reserve_crashkernel(unsigned long long size) 493 { 494 const unsigned long long alignment = 16<<20; /* 16M */ 495 unsigned long long start = 0LL; 496 497 while (1) { 498 int ret; 499 500 start = find_e820_area(start, ULONG_MAX, size, alignment); 501 if (start == -1ULL) 502 return start; 503 504 /* try to reserve it */ 505 ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE); 506 if (ret >= 0) 507 return start; 508 509 start += alignment; 510 } 511 } 512 513 static inline unsigned long long get_total_mem(void) 514 { 515 unsigned long long total; 516 517 total = max_low_pfn - min_low_pfn; 518 #ifdef CONFIG_HIGHMEM 519 total += highend_pfn - highstart_pfn; 520 #endif 521 522 return total << PAGE_SHIFT; 523 } 524 525 static void __init reserve_crashkernel(void) 526 { 527 unsigned long long total_mem; 528 unsigned long long crash_size, crash_base; 529 int ret; 530 531 total_mem = get_total_mem(); 532 533 ret = parse_crashkernel(boot_command_line, total_mem, 534 &crash_size, &crash_base); 535 if (ret != 0 || crash_size <= 0) 536 return; 537 538 /* 0 means: find the address automatically */ 539 if (crash_base <= 0) { 540 crash_base = find_and_reserve_crashkernel(crash_size); 541 if (crash_base == -1ULL) { 542 pr_info("crashkernel reservation failed. " 543 "No suitable area found.\n"); 544 return; 545 } 546 } else { 547 ret = reserve_bootmem_generic(crash_base, crash_size, 548 BOOTMEM_EXCLUSIVE); 549 if (ret < 0) { 550 pr_info("crashkernel reservation failed - " 551 "memory is in use\n"); 552 return; 553 } 554 } 555 556 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " 557 "for crashkernel (System RAM: %ldMB)\n", 558 (unsigned long)(crash_size >> 20), 559 (unsigned long)(crash_base >> 20), 560 (unsigned long)(total_mem >> 20)); 561 562 crashk_res.start = crash_base; 563 crashk_res.end = crash_base + crash_size - 1; 564 insert_resource(&iomem_resource, &crashk_res); 565 } 566 #else 567 static void __init reserve_crashkernel(void) 568 { 569 } 570 #endif 571 572 static struct resource standard_io_resources[] = { 573 { .name = "dma1", .start = 0x00, .end = 0x1f, 574 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 575 { .name = "pic1", .start = 0x20, .end = 0x21, 576 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 577 { .name = "timer0", .start = 0x40, .end = 0x43, 578 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 579 { .name = "timer1", .start = 0x50, .end = 0x53, 580 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 581 { .name = "keyboard", .start = 0x60, .end = 0x60, 582 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 583 { .name = "keyboard", .start = 0x64, .end = 0x64, 584 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 585 { .name = "dma page reg", .start = 0x80, .end = 0x8f, 586 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 587 { .name = "pic2", .start = 0xa0, .end = 0xa1, 588 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 589 { .name = "dma2", .start = 0xc0, .end = 0xdf, 590 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 591 { .name = "fpu", .start = 0xf0, .end = 0xff, 592 .flags = IORESOURCE_BUSY | IORESOURCE_IO } 593 }; 594 595 static void __init reserve_standard_io_resources(void) 596 { 597 int i; 598 599 /* request I/O space for devices used on all i[345]86 PCs */ 600 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) 601 request_resource(&ioport_resource, &standard_io_resources[i]); 602 603 } 604 605 /* 606 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by 607 * is_kdump_kernel() to determine if we are booting after a panic. Hence 608 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE. 609 */ 610 611 #ifdef CONFIG_CRASH_DUMP 612 /* elfcorehdr= specifies the location of elf core header 613 * stored by the crashed kernel. This option will be passed 614 * by kexec loader to the capture kernel. 615 */ 616 static int __init setup_elfcorehdr(char *arg) 617 { 618 char *end; 619 if (!arg) 620 return -EINVAL; 621 elfcorehdr_addr = memparse(arg, &end); 622 return end > arg ? 0 : -EINVAL; 623 } 624 early_param("elfcorehdr", setup_elfcorehdr); 625 #endif 626 627 static struct x86_quirks default_x86_quirks __initdata; 628 629 struct x86_quirks *x86_quirks __initdata = &default_x86_quirks; 630 631 #ifdef CONFIG_X86_RESERVE_LOW_64K 632 static int __init dmi_low_memory_corruption(const struct dmi_system_id *d) 633 { 634 printk(KERN_NOTICE 635 "%s detected: BIOS may corrupt low RAM, working around it.\n", 636 d->ident); 637 638 e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED); 639 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 640 641 return 0; 642 } 643 #endif 644 645 /* List of systems that have known low memory corruption BIOS problems */ 646 static struct dmi_system_id __initdata bad_bios_dmi_table[] = { 647 #ifdef CONFIG_X86_RESERVE_LOW_64K 648 { 649 .callback = dmi_low_memory_corruption, 650 .ident = "AMI BIOS", 651 .matches = { 652 DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), 653 }, 654 }, 655 { 656 .callback = dmi_low_memory_corruption, 657 .ident = "Phoenix BIOS", 658 .matches = { 659 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"), 660 }, 661 }, 662 #endif 663 {} 664 }; 665 666 /* 667 * Determine if we were loaded by an EFI loader. If so, then we have also been 668 * passed the efi memmap, systab, etc., so we should use these data structures 669 * for initialization. Note, the efi init code path is determined by the 670 * global efi_enabled. This allows the same kernel image to be used on existing 671 * systems (with a traditional BIOS) as well as on EFI systems. 672 */ 673 /* 674 * setup_arch - architecture-specific boot-time initializations 675 * 676 * Note: On x86_64, fixmaps are ready for use even before this is called. 677 */ 678 679 void __init setup_arch(char **cmdline_p) 680 { 681 #ifdef CONFIG_X86_32 682 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); 683 visws_early_detect(); 684 #else 685 printk(KERN_INFO "Command line: %s\n", boot_command_line); 686 #endif 687 688 /* VMI may relocate the fixmap; do this before touching ioremap area */ 689 vmi_init(); 690 691 early_cpu_init(); 692 early_ioremap_init(); 693 694 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); 695 screen_info = boot_params.screen_info; 696 edid_info = boot_params.edid_info; 697 #ifdef CONFIG_X86_32 698 apm_info.bios = boot_params.apm_bios_info; 699 ist_info = boot_params.ist_info; 700 if (boot_params.sys_desc_table.length != 0) { 701 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); 702 machine_id = boot_params.sys_desc_table.table[0]; 703 machine_submodel_id = boot_params.sys_desc_table.table[1]; 704 BIOS_revision = boot_params.sys_desc_table.table[2]; 705 } 706 #endif 707 saved_video_mode = boot_params.hdr.vid_mode; 708 bootloader_type = boot_params.hdr.type_of_loader; 709 710 #ifdef CONFIG_BLK_DEV_RAM 711 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; 712 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); 713 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); 714 #endif 715 #ifdef CONFIG_EFI 716 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, 717 #ifdef CONFIG_X86_32 718 "EL32", 719 #else 720 "EL64", 721 #endif 722 4)) { 723 efi_enabled = 1; 724 efi_reserve_early(); 725 } 726 #endif 727 728 ARCH_SETUP 729 730 setup_memory_map(); 731 parse_setup_data(); 732 /* update the e820_saved too */ 733 e820_reserve_setup_data(); 734 735 copy_edd(); 736 737 if (!boot_params.hdr.root_flags) 738 root_mountflags &= ~MS_RDONLY; 739 init_mm.start_code = (unsigned long) _text; 740 init_mm.end_code = (unsigned long) _etext; 741 init_mm.end_data = (unsigned long) _edata; 742 init_mm.brk = _brk_end; 743 744 code_resource.start = virt_to_phys(_text); 745 code_resource.end = virt_to_phys(_etext)-1; 746 data_resource.start = virt_to_phys(_etext); 747 data_resource.end = virt_to_phys(_edata)-1; 748 bss_resource.start = virt_to_phys(&__bss_start); 749 bss_resource.end = virt_to_phys(&__bss_stop)-1; 750 751 #ifdef CONFIG_CMDLINE_BOOL 752 #ifdef CONFIG_CMDLINE_OVERRIDE 753 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); 754 #else 755 if (builtin_cmdline[0]) { 756 /* append boot loader cmdline to builtin */ 757 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); 758 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); 759 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); 760 } 761 #endif 762 #endif 763 764 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); 765 *cmdline_p = command_line; 766 767 parse_early_param(); 768 769 #ifdef CONFIG_X86_64 770 check_efer(); 771 #endif 772 773 /* Must be before kernel pagetables are setup */ 774 vmi_activate(); 775 776 /* after early param, so could get panic from serial */ 777 reserve_early_setup_data(); 778 779 if (acpi_mps_check()) { 780 #ifdef CONFIG_X86_LOCAL_APIC 781 disable_apic = 1; 782 #endif 783 setup_clear_cpu_cap(X86_FEATURE_APIC); 784 } 785 786 #ifdef CONFIG_PCI 787 if (pci_early_dump_regs) 788 early_dump_pci_devices(); 789 #endif 790 791 finish_e820_parsing(); 792 793 if (efi_enabled) 794 efi_init(); 795 796 dmi_scan_machine(); 797 798 dmi_check_system(bad_bios_dmi_table); 799 800 /* 801 * VMware detection requires dmi to be available, so this 802 * needs to be done after dmi_scan_machine, for the BP. 803 */ 804 init_hypervisor(&boot_cpu_data); 805 806 #ifdef CONFIG_X86_32 807 probe_roms(); 808 #endif 809 810 /* after parse_early_param, so could debug it */ 811 insert_resource(&iomem_resource, &code_resource); 812 insert_resource(&iomem_resource, &data_resource); 813 insert_resource(&iomem_resource, &bss_resource); 814 815 816 #ifdef CONFIG_X86_32 817 if (ppro_with_ram_bug()) { 818 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, 819 E820_RESERVED); 820 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 821 printk(KERN_INFO "fixed physical RAM map:\n"); 822 e820_print_map("bad_ppro"); 823 } 824 #else 825 early_gart_iommu_check(); 826 #endif 827 828 /* 829 * partially used pages are not usable - thus 830 * we are rounding upwards: 831 */ 832 max_pfn = e820_end_of_ram_pfn(); 833 834 /* preallocate 4k for mptable mpc */ 835 early_reserve_e820_mpc_new(); 836 /* update e820 for memory not covered by WB MTRRs */ 837 mtrr_bp_init(); 838 if (mtrr_trim_uncached_memory(max_pfn)) 839 max_pfn = e820_end_of_ram_pfn(); 840 841 #ifdef CONFIG_X86_32 842 /* max_low_pfn get updated here */ 843 find_low_pfn_range(); 844 #else 845 num_physpages = max_pfn; 846 847 check_x2apic(); 848 849 /* How many end-of-memory variables you have, grandma! */ 850 /* need this before calling reserve_initrd */ 851 if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) 852 max_low_pfn = e820_end_of_low_ram_pfn(); 853 else 854 max_low_pfn = max_pfn; 855 856 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; 857 #endif 858 859 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION 860 setup_bios_corruption_check(); 861 #endif 862 863 reserve_brk(); 864 865 /* max_pfn_mapped is updated here */ 866 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); 867 max_pfn_mapped = max_low_pfn_mapped; 868 869 #ifdef CONFIG_X86_64 870 if (max_pfn > max_low_pfn) { 871 max_pfn_mapped = init_memory_mapping(1UL<<32, 872 max_pfn<<PAGE_SHIFT); 873 /* can we preseve max_low_pfn ?*/ 874 max_low_pfn = max_pfn; 875 } 876 #endif 877 878 /* 879 * NOTE: On x86-32, only from this point on, fixmaps are ready for use. 880 */ 881 882 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT 883 if (init_ohci1394_dma_early) 884 init_ohci1394_dma_on_all_controllers(); 885 #endif 886 887 reserve_initrd(); 888 889 vsmp_init(); 890 891 io_delay_init(); 892 893 /* 894 * Parse the ACPI tables for possible boot-time SMP configuration. 895 */ 896 acpi_boot_table_init(); 897 898 early_acpi_boot_init(); 899 900 #ifdef CONFIG_ACPI_NUMA 901 /* 902 * Parse SRAT to discover nodes. 903 */ 904 acpi_numa_init(); 905 #endif 906 907 initmem_init(0, max_pfn); 908 909 #ifdef CONFIG_ACPI_SLEEP 910 /* 911 * Reserve low memory region for sleep support. 912 */ 913 acpi_reserve_bootmem(); 914 #endif 915 /* 916 * Find and reserve possible boot-time SMP configuration: 917 */ 918 find_smp_config(); 919 920 reserve_crashkernel(); 921 922 #ifdef CONFIG_X86_64 923 /* 924 * dma32_reserve_bootmem() allocates bootmem which may conflict 925 * with the crashkernel command line, so do that after 926 * reserve_crashkernel() 927 */ 928 dma32_reserve_bootmem(); 929 #endif 930 931 reserve_ibft_region(); 932 933 #ifdef CONFIG_KVM_CLOCK 934 kvmclock_init(); 935 #endif 936 937 paravirt_pagetable_setup_start(swapper_pg_dir); 938 paging_init(); 939 paravirt_pagetable_setup_done(swapper_pg_dir); 940 paravirt_post_allocator_init(); 941 942 #ifdef CONFIG_X86_64 943 map_vsyscall(); 944 #endif 945 946 generic_apic_probe(); 947 948 early_quirks(); 949 950 /* 951 * Read APIC and some other early information from ACPI tables. 952 */ 953 acpi_boot_init(); 954 955 #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS) 956 /* 957 * get boot-time SMP configuration: 958 */ 959 if (smp_found_config) 960 get_smp_config(); 961 #endif 962 963 prefill_possible_map(); 964 965 #ifdef CONFIG_X86_64 966 init_cpu_to_node(); 967 #endif 968 969 init_apic_mappings(); 970 ioapic_init_mappings(); 971 972 /* need to wait for io_apic is mapped */ 973 probe_nr_irqs_gsi(); 974 975 kvm_guest_init(); 976 977 e820_reserve_resources(); 978 e820_mark_nosave_regions(max_low_pfn); 979 980 #ifdef CONFIG_X86_32 981 request_resource(&iomem_resource, &video_ram_resource); 982 #endif 983 reserve_standard_io_resources(); 984 985 e820_setup_gap(); 986 987 #ifdef CONFIG_VT 988 #if defined(CONFIG_VGA_CONSOLE) 989 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) 990 conswitchp = &vga_con; 991 #elif defined(CONFIG_DUMMY_CONSOLE) 992 conswitchp = &dummy_con; 993 #endif 994 #endif 995 } 996 997 #ifdef CONFIG_X86_32 998 999 /** 1000 * x86_quirk_pre_intr_init - initialisation prior to setting up interrupt vectors 1001 * 1002 * Description: 1003 * Perform any necessary interrupt initialisation prior to setting up 1004 * the "ordinary" interrupt call gates. For legacy reasons, the ISA 1005 * interrupts should be initialised here if the machine emulates a PC 1006 * in any way. 1007 **/ 1008 void __init x86_quirk_pre_intr_init(void) 1009 { 1010 if (x86_quirks->arch_pre_intr_init) { 1011 if (x86_quirks->arch_pre_intr_init()) 1012 return; 1013 } 1014 init_ISA_irqs(); 1015 } 1016 1017 /** 1018 * x86_quirk_intr_init - post gate setup interrupt initialisation 1019 * 1020 * Description: 1021 * Fill in any interrupts that may have been left out by the general 1022 * init_IRQ() routine. interrupts having to do with the machine rather 1023 * than the devices on the I/O bus (like APIC interrupts in intel MP 1024 * systems) are started here. 1025 **/ 1026 void __init x86_quirk_intr_init(void) 1027 { 1028 if (x86_quirks->arch_intr_init) { 1029 if (x86_quirks->arch_intr_init()) 1030 return; 1031 } 1032 } 1033 1034 /** 1035 * x86_quirk_trap_init - initialise system specific traps 1036 * 1037 * Description: 1038 * Called as the final act of trap_init(). Used in VISWS to initialise 1039 * the various board specific APIC traps. 1040 **/ 1041 void __init x86_quirk_trap_init(void) 1042 { 1043 if (x86_quirks->arch_trap_init) { 1044 if (x86_quirks->arch_trap_init()) 1045 return; 1046 } 1047 } 1048 1049 static struct irqaction irq0 = { 1050 .handler = timer_interrupt, 1051 .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER, 1052 .name = "timer" 1053 }; 1054 1055 /** 1056 * x86_quirk_pre_time_init - do any specific initialisations before. 1057 * 1058 **/ 1059 void __init x86_quirk_pre_time_init(void) 1060 { 1061 if (x86_quirks->arch_pre_time_init) 1062 x86_quirks->arch_pre_time_init(); 1063 } 1064 1065 /** 1066 * x86_quirk_time_init - do any specific initialisations for the system timer. 1067 * 1068 * Description: 1069 * Must plug the system timer interrupt source at HZ into the IRQ listed 1070 * in irq_vectors.h:TIMER_IRQ 1071 **/ 1072 void __init x86_quirk_time_init(void) 1073 { 1074 if (x86_quirks->arch_time_init) { 1075 /* 1076 * A nonzero return code does not mean failure, it means 1077 * that the architecture quirk does not want any 1078 * generic (timer) setup to be performed after this: 1079 */ 1080 if (x86_quirks->arch_time_init()) 1081 return; 1082 } 1083 1084 irq0.mask = cpumask_of_cpu(0); 1085 setup_irq(0, &irq0); 1086 } 1087 #endif /* CONFIG_X86_32 */ 1088