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