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/arch_hooks.h> 78 #include <asm/efi.h> 79 #include <asm/sections.h> 80 #include <asm/dmi.h> 81 #include <asm/io_apic.h> 82 #include <asm/ist.h> 83 #include <asm/vmi.h> 84 #include <setup_arch.h> 85 #include <asm/bios_ebda.h> 86 #include <asm/cacheflush.h> 87 #include <asm/processor.h> 88 #include <asm/bugs.h> 89 90 #include <asm/system.h> 91 #include <asm/vsyscall.h> 92 #include <asm/smp.h> 93 #include <asm/desc.h> 94 #include <asm/dma.h> 95 #include <asm/iommu.h> 96 #include <asm/mmu_context.h> 97 #include <asm/proto.h> 98 99 #include <mach_apic.h> 100 #include <asm/paravirt.h> 101 102 #include <asm/percpu.h> 103 #include <asm/topology.h> 104 #include <asm/apicdef.h> 105 #ifdef CONFIG_X86_64 106 #include <asm/numa_64.h> 107 #endif 108 109 #ifndef ARCH_SETUP 110 #define ARCH_SETUP 111 #endif 112 113 #ifndef CONFIG_DEBUG_BOOT_PARAMS 114 struct boot_params __initdata boot_params; 115 #else 116 struct boot_params boot_params; 117 #endif 118 119 /* 120 * Machine setup.. 121 */ 122 static struct resource data_resource = { 123 .name = "Kernel data", 124 .start = 0, 125 .end = 0, 126 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 127 }; 128 129 static struct resource code_resource = { 130 .name = "Kernel code", 131 .start = 0, 132 .end = 0, 133 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 134 }; 135 136 static struct resource bss_resource = { 137 .name = "Kernel bss", 138 .start = 0, 139 .end = 0, 140 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 141 }; 142 143 144 #ifdef CONFIG_X86_32 145 /* This value is set up by the early boot code to point to the value 146 immediately after the boot time page tables. It contains a *physical* 147 address, and must not be in the .bss segment! */ 148 unsigned long init_pg_tables_start __initdata = ~0UL; 149 unsigned long init_pg_tables_end __initdata = ~0UL; 150 151 static struct resource video_ram_resource = { 152 .name = "Video RAM area", 153 .start = 0xa0000, 154 .end = 0xbffff, 155 .flags = IORESOURCE_BUSY | IORESOURCE_MEM 156 }; 157 158 /* cpu data as detected by the assembly code in head.S */ 159 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; 160 /* common cpu data for all cpus */ 161 struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; 162 EXPORT_SYMBOL(boot_cpu_data); 163 static void set_mca_bus(int x) 164 { 165 #ifdef CONFIG_MCA 166 MCA_bus = x; 167 #endif 168 } 169 170 unsigned int def_to_bigsmp; 171 172 /* for MCA, but anyone else can use it if they want */ 173 unsigned int machine_id; 174 unsigned int machine_submodel_id; 175 unsigned int BIOS_revision; 176 177 struct apm_info apm_info; 178 EXPORT_SYMBOL(apm_info); 179 180 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ 181 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) 182 struct ist_info ist_info; 183 EXPORT_SYMBOL(ist_info); 184 #else 185 struct ist_info ist_info; 186 #endif 187 188 #else 189 struct cpuinfo_x86 boot_cpu_data __read_mostly; 190 EXPORT_SYMBOL(boot_cpu_data); 191 #endif 192 193 194 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) 195 unsigned long mmu_cr4_features; 196 #else 197 unsigned long mmu_cr4_features = X86_CR4_PAE; 198 #endif 199 200 /* Boot loader ID as an integer, for the benefit of proc_dointvec */ 201 int bootloader_type; 202 203 /* 204 * Early DMI memory 205 */ 206 int dmi_alloc_index; 207 char dmi_alloc_data[DMI_MAX_DATA]; 208 209 /* 210 * Setup options 211 */ 212 struct screen_info screen_info; 213 EXPORT_SYMBOL(screen_info); 214 struct edid_info edid_info; 215 EXPORT_SYMBOL_GPL(edid_info); 216 217 extern int root_mountflags; 218 219 unsigned long saved_video_mode; 220 221 #define RAMDISK_IMAGE_START_MASK 0x07FF 222 #define RAMDISK_PROMPT_FLAG 0x8000 223 #define RAMDISK_LOAD_FLAG 0x4000 224 225 static char __initdata command_line[COMMAND_LINE_SIZE]; 226 227 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) 228 struct edd edd; 229 #ifdef CONFIG_EDD_MODULE 230 EXPORT_SYMBOL(edd); 231 #endif 232 /** 233 * copy_edd() - Copy the BIOS EDD information 234 * from boot_params into a safe place. 235 * 236 */ 237 static inline void copy_edd(void) 238 { 239 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, 240 sizeof(edd.mbr_signature)); 241 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); 242 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; 243 edd.edd_info_nr = boot_params.eddbuf_entries; 244 } 245 #else 246 static inline void copy_edd(void) 247 { 248 } 249 #endif 250 251 #ifdef CONFIG_BLK_DEV_INITRD 252 253 #ifdef CONFIG_X86_32 254 255 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) 256 static void __init relocate_initrd(void) 257 { 258 259 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 260 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 261 u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; 262 u64 ramdisk_here; 263 unsigned long slop, clen, mapaddr; 264 char *p, *q; 265 266 /* We need to move the initrd down into lowmem */ 267 ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size, 268 PAGE_SIZE); 269 270 if (ramdisk_here == -1ULL) 271 panic("Cannot find place for new RAMDISK of size %lld\n", 272 ramdisk_size); 273 274 /* Note: this includes all the lowmem currently occupied by 275 the initrd, we rely on that fact to keep the data intact. */ 276 reserve_early(ramdisk_here, ramdisk_here + ramdisk_size, 277 "NEW RAMDISK"); 278 initrd_start = ramdisk_here + PAGE_OFFSET; 279 initrd_end = initrd_start + ramdisk_size; 280 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", 281 ramdisk_here, ramdisk_here + ramdisk_size); 282 283 q = (char *)initrd_start; 284 285 /* Copy any lowmem portion of the initrd */ 286 if (ramdisk_image < end_of_lowmem) { 287 clen = end_of_lowmem - ramdisk_image; 288 p = (char *)__va(ramdisk_image); 289 memcpy(q, p, clen); 290 q += clen; 291 ramdisk_image += clen; 292 ramdisk_size -= clen; 293 } 294 295 /* Copy the highmem portion of the initrd */ 296 while (ramdisk_size) { 297 slop = ramdisk_image & ~PAGE_MASK; 298 clen = ramdisk_size; 299 if (clen > MAX_MAP_CHUNK-slop) 300 clen = MAX_MAP_CHUNK-slop; 301 mapaddr = ramdisk_image & PAGE_MASK; 302 p = early_ioremap(mapaddr, clen+slop); 303 memcpy(q, p+slop, clen); 304 early_iounmap(p, clen+slop); 305 q += clen; 306 ramdisk_image += clen; 307 ramdisk_size -= clen; 308 } 309 /* high pages is not converted by early_res_to_bootmem */ 310 ramdisk_image = boot_params.hdr.ramdisk_image; 311 ramdisk_size = boot_params.hdr.ramdisk_size; 312 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" 313 " %08llx - %08llx\n", 314 ramdisk_image, ramdisk_image + ramdisk_size - 1, 315 ramdisk_here, ramdisk_here + ramdisk_size - 1); 316 } 317 #endif 318 319 static void __init reserve_initrd(void) 320 { 321 u64 ramdisk_image = boot_params.hdr.ramdisk_image; 322 u64 ramdisk_size = boot_params.hdr.ramdisk_size; 323 u64 ramdisk_end = ramdisk_image + ramdisk_size; 324 u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; 325 326 if (!boot_params.hdr.type_of_loader || 327 !ramdisk_image || !ramdisk_size) 328 return; /* No initrd provided by bootloader */ 329 330 initrd_start = 0; 331 332 if (ramdisk_size >= (end_of_lowmem>>1)) { 333 free_early(ramdisk_image, ramdisk_end); 334 printk(KERN_ERR "initrd too large to handle, " 335 "disabling initrd\n"); 336 return; 337 } 338 339 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, 340 ramdisk_end); 341 342 343 if (ramdisk_end <= end_of_lowmem) { 344 /* All in lowmem, easy case */ 345 /* 346 * don't need to reserve again, already reserved early 347 * in i386_start_kernel 348 */ 349 initrd_start = ramdisk_image + PAGE_OFFSET; 350 initrd_end = initrd_start + ramdisk_size; 351 return; 352 } 353 354 #ifdef CONFIG_X86_32 355 relocate_initrd(); 356 #else 357 printk(KERN_ERR "initrd extends beyond end of memory " 358 "(0x%08llx > 0x%08llx)\ndisabling initrd\n", 359 ramdisk_end, end_of_lowmem); 360 initrd_start = 0; 361 #endif 362 free_early(ramdisk_image, ramdisk_end); 363 } 364 #else 365 static void __init reserve_initrd(void) 366 { 367 } 368 #endif /* CONFIG_BLK_DEV_INITRD */ 369 370 static void __init parse_setup_data(void) 371 { 372 struct setup_data *data; 373 u64 pa_data; 374 375 if (boot_params.hdr.version < 0x0209) 376 return; 377 pa_data = boot_params.hdr.setup_data; 378 while (pa_data) { 379 data = early_ioremap(pa_data, PAGE_SIZE); 380 switch (data->type) { 381 case SETUP_E820_EXT: 382 parse_e820_ext(data, pa_data); 383 break; 384 default: 385 break; 386 } 387 pa_data = data->next; 388 early_iounmap(data, PAGE_SIZE); 389 } 390 } 391 392 static void __init e820_reserve_setup_data(void) 393 { 394 struct setup_data *data; 395 u64 pa_data; 396 int found = 0; 397 398 if (boot_params.hdr.version < 0x0209) 399 return; 400 pa_data = boot_params.hdr.setup_data; 401 while (pa_data) { 402 data = early_ioremap(pa_data, sizeof(*data)); 403 e820_update_range(pa_data, sizeof(*data)+data->len, 404 E820_RAM, E820_RESERVED_KERN); 405 found = 1; 406 pa_data = data->next; 407 early_iounmap(data, sizeof(*data)); 408 } 409 if (!found) 410 return; 411 412 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 413 memcpy(&e820_saved, &e820, sizeof(struct e820map)); 414 printk(KERN_INFO "extended physical RAM map:\n"); 415 e820_print_map("reserve setup_data"); 416 } 417 418 static void __init reserve_early_setup_data(void) 419 { 420 struct setup_data *data; 421 u64 pa_data; 422 char buf[32]; 423 424 if (boot_params.hdr.version < 0x0209) 425 return; 426 pa_data = boot_params.hdr.setup_data; 427 while (pa_data) { 428 data = early_ioremap(pa_data, sizeof(*data)); 429 sprintf(buf, "setup data %x", data->type); 430 reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf); 431 pa_data = data->next; 432 early_iounmap(data, sizeof(*data)); 433 } 434 } 435 436 /* 437 * --------- Crashkernel reservation ------------------------------ 438 */ 439 440 #ifdef CONFIG_KEXEC 441 442 /** 443 * Reserve @size bytes of crashkernel memory at any suitable offset. 444 * 445 * @size: Size of the crashkernel memory to reserve. 446 * Returns the base address on success, and -1ULL on failure. 447 */ 448 unsigned long long find_and_reserve_crashkernel(unsigned long long size) 449 { 450 const unsigned long long alignment = 16<<20; /* 16M */ 451 unsigned long long start = 0LL; 452 453 while (1) { 454 int ret; 455 456 start = find_e820_area(start, ULONG_MAX, size, alignment); 457 if (start == -1ULL) 458 return start; 459 460 /* try to reserve it */ 461 ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE); 462 if (ret >= 0) 463 return start; 464 465 start += alignment; 466 } 467 } 468 469 static inline unsigned long long get_total_mem(void) 470 { 471 unsigned long long total; 472 473 total = max_low_pfn - min_low_pfn; 474 #ifdef CONFIG_HIGHMEM 475 total += highend_pfn - highstart_pfn; 476 #endif 477 478 return total << PAGE_SHIFT; 479 } 480 481 static void __init reserve_crashkernel(void) 482 { 483 unsigned long long total_mem; 484 unsigned long long crash_size, crash_base; 485 int ret; 486 487 total_mem = get_total_mem(); 488 489 ret = parse_crashkernel(boot_command_line, total_mem, 490 &crash_size, &crash_base); 491 if (ret != 0 || crash_size <= 0) 492 return; 493 494 /* 0 means: find the address automatically */ 495 if (crash_base <= 0) { 496 crash_base = find_and_reserve_crashkernel(crash_size); 497 if (crash_base == -1ULL) { 498 pr_info("crashkernel reservation failed. " 499 "No suitable area found.\n"); 500 return; 501 } 502 } else { 503 ret = reserve_bootmem_generic(crash_base, crash_size, 504 BOOTMEM_EXCLUSIVE); 505 if (ret < 0) { 506 pr_info("crashkernel reservation failed - " 507 "memory is in use\n"); 508 return; 509 } 510 } 511 512 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " 513 "for crashkernel (System RAM: %ldMB)\n", 514 (unsigned long)(crash_size >> 20), 515 (unsigned long)(crash_base >> 20), 516 (unsigned long)(total_mem >> 20)); 517 518 crashk_res.start = crash_base; 519 crashk_res.end = crash_base + crash_size - 1; 520 insert_resource(&iomem_resource, &crashk_res); 521 } 522 #else 523 static void __init reserve_crashkernel(void) 524 { 525 } 526 #endif 527 528 static struct resource standard_io_resources[] = { 529 { .name = "dma1", .start = 0x00, .end = 0x1f, 530 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 531 { .name = "pic1", .start = 0x20, .end = 0x21, 532 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 533 { .name = "timer0", .start = 0x40, .end = 0x43, 534 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 535 { .name = "timer1", .start = 0x50, .end = 0x53, 536 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 537 { .name = "keyboard", .start = 0x60, .end = 0x60, 538 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 539 { .name = "keyboard", .start = 0x64, .end = 0x64, 540 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 541 { .name = "dma page reg", .start = 0x80, .end = 0x8f, 542 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 543 { .name = "pic2", .start = 0xa0, .end = 0xa1, 544 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 545 { .name = "dma2", .start = 0xc0, .end = 0xdf, 546 .flags = IORESOURCE_BUSY | IORESOURCE_IO }, 547 { .name = "fpu", .start = 0xf0, .end = 0xff, 548 .flags = IORESOURCE_BUSY | IORESOURCE_IO } 549 }; 550 551 static void __init reserve_standard_io_resources(void) 552 { 553 int i; 554 555 /* request I/O space for devices used on all i[345]86 PCs */ 556 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) 557 request_resource(&ioport_resource, &standard_io_resources[i]); 558 559 } 560 561 #ifdef CONFIG_PROC_VMCORE 562 /* elfcorehdr= specifies the location of elf core header 563 * stored by the crashed kernel. This option will be passed 564 * by kexec loader to the capture kernel. 565 */ 566 static int __init setup_elfcorehdr(char *arg) 567 { 568 char *end; 569 if (!arg) 570 return -EINVAL; 571 elfcorehdr_addr = memparse(arg, &end); 572 return end > arg ? 0 : -EINVAL; 573 } 574 early_param("elfcorehdr", setup_elfcorehdr); 575 #endif 576 577 static struct x86_quirks default_x86_quirks __initdata; 578 579 struct x86_quirks *x86_quirks __initdata = &default_x86_quirks; 580 581 /* 582 * Determine if we were loaded by an EFI loader. If so, then we have also been 583 * passed the efi memmap, systab, etc., so we should use these data structures 584 * for initialization. Note, the efi init code path is determined by the 585 * global efi_enabled. This allows the same kernel image to be used on existing 586 * systems (with a traditional BIOS) as well as on EFI systems. 587 */ 588 /* 589 * setup_arch - architecture-specific boot-time initializations 590 * 591 * Note: On x86_64, fixmaps are ready for use even before this is called. 592 */ 593 594 void __init setup_arch(char **cmdline_p) 595 { 596 #ifdef CONFIG_X86_32 597 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); 598 visws_early_detect(); 599 pre_setup_arch_hook(); 600 #else 601 printk(KERN_INFO "Command line: %s\n", boot_command_line); 602 #endif 603 604 early_cpu_init(); 605 early_ioremap_init(); 606 607 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); 608 screen_info = boot_params.screen_info; 609 edid_info = boot_params.edid_info; 610 #ifdef CONFIG_X86_32 611 apm_info.bios = boot_params.apm_bios_info; 612 ist_info = boot_params.ist_info; 613 if (boot_params.sys_desc_table.length != 0) { 614 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2); 615 machine_id = boot_params.sys_desc_table.table[0]; 616 machine_submodel_id = boot_params.sys_desc_table.table[1]; 617 BIOS_revision = boot_params.sys_desc_table.table[2]; 618 } 619 #endif 620 saved_video_mode = boot_params.hdr.vid_mode; 621 bootloader_type = boot_params.hdr.type_of_loader; 622 623 #ifdef CONFIG_BLK_DEV_RAM 624 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; 625 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0); 626 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0); 627 #endif 628 #ifdef CONFIG_EFI 629 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, 630 #ifdef CONFIG_X86_32 631 "EL32", 632 #else 633 "EL64", 634 #endif 635 4)) { 636 efi_enabled = 1; 637 efi_reserve_early(); 638 } 639 #endif 640 641 ARCH_SETUP 642 643 setup_memory_map(); 644 parse_setup_data(); 645 /* update the e820_saved too */ 646 e820_reserve_setup_data(); 647 648 copy_edd(); 649 650 if (!boot_params.hdr.root_flags) 651 root_mountflags &= ~MS_RDONLY; 652 init_mm.start_code = (unsigned long) _text; 653 init_mm.end_code = (unsigned long) _etext; 654 init_mm.end_data = (unsigned long) _edata; 655 #ifdef CONFIG_X86_32 656 init_mm.brk = init_pg_tables_end + PAGE_OFFSET; 657 #else 658 init_mm.brk = (unsigned long) &_end; 659 #endif 660 661 code_resource.start = virt_to_phys(_text); 662 code_resource.end = virt_to_phys(_etext)-1; 663 data_resource.start = virt_to_phys(_etext); 664 data_resource.end = virt_to_phys(_edata)-1; 665 bss_resource.start = virt_to_phys(&__bss_start); 666 bss_resource.end = virt_to_phys(&__bss_stop)-1; 667 668 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); 669 *cmdline_p = command_line; 670 671 parse_early_param(); 672 673 /* after early param, so could get panic from serial */ 674 reserve_early_setup_data(); 675 676 if (acpi_mps_check()) { 677 #ifdef CONFIG_X86_LOCAL_APIC 678 disable_apic = 1; 679 #endif 680 setup_clear_cpu_cap(X86_FEATURE_APIC); 681 } 682 683 #ifdef CONFIG_PCI 684 if (pci_early_dump_regs) 685 early_dump_pci_devices(); 686 #endif 687 688 finish_e820_parsing(); 689 690 #ifdef CONFIG_X86_32 691 probe_roms(); 692 #endif 693 694 /* after parse_early_param, so could debug it */ 695 insert_resource(&iomem_resource, &code_resource); 696 insert_resource(&iomem_resource, &data_resource); 697 insert_resource(&iomem_resource, &bss_resource); 698 699 if (efi_enabled) 700 efi_init(); 701 702 #ifdef CONFIG_X86_32 703 if (ppro_with_ram_bug()) { 704 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, 705 E820_RESERVED); 706 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); 707 printk(KERN_INFO "fixed physical RAM map:\n"); 708 e820_print_map("bad_ppro"); 709 } 710 #else 711 early_gart_iommu_check(); 712 #endif 713 714 /* 715 * partially used pages are not usable - thus 716 * we are rounding upwards: 717 */ 718 max_pfn = e820_end_of_ram_pfn(); 719 720 /* preallocate 4k for mptable mpc */ 721 early_reserve_e820_mpc_new(); 722 /* update e820 for memory not covered by WB MTRRs */ 723 mtrr_bp_init(); 724 if (mtrr_trim_uncached_memory(max_pfn)) 725 max_pfn = e820_end_of_ram_pfn(); 726 727 #ifdef CONFIG_X86_32 728 /* max_low_pfn get updated here */ 729 find_low_pfn_range(); 730 #else 731 num_physpages = max_pfn; 732 733 check_efer(); 734 735 /* How many end-of-memory variables you have, grandma! */ 736 /* need this before calling reserve_initrd */ 737 if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) 738 max_low_pfn = e820_end_of_low_ram_pfn(); 739 else 740 max_low_pfn = max_pfn; 741 742 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; 743 #endif 744 745 /* max_pfn_mapped is updated here */ 746 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); 747 max_pfn_mapped = max_low_pfn_mapped; 748 749 #ifdef CONFIG_X86_64 750 if (max_pfn > max_low_pfn) { 751 max_pfn_mapped = init_memory_mapping(1UL<<32, 752 max_pfn<<PAGE_SHIFT); 753 /* can we preseve max_low_pfn ?*/ 754 max_low_pfn = max_pfn; 755 } 756 #endif 757 758 /* 759 * NOTE: On x86-32, only from this point on, fixmaps are ready for use. 760 */ 761 762 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT 763 if (init_ohci1394_dma_early) 764 init_ohci1394_dma_on_all_controllers(); 765 #endif 766 767 reserve_initrd(); 768 769 #ifdef CONFIG_X86_64 770 vsmp_init(); 771 #endif 772 773 dmi_scan_machine(); 774 775 io_delay_init(); 776 777 /* 778 * Parse the ACPI tables for possible boot-time SMP configuration. 779 */ 780 acpi_boot_table_init(); 781 782 #ifdef CONFIG_ACPI_NUMA 783 /* 784 * Parse SRAT to discover nodes. 785 */ 786 acpi_numa_init(); 787 #endif 788 789 initmem_init(0, max_pfn); 790 791 #ifdef CONFIG_X86_64 792 dma32_reserve_bootmem(); 793 #endif 794 795 #ifdef CONFIG_ACPI_SLEEP 796 /* 797 * Reserve low memory region for sleep support. 798 */ 799 acpi_reserve_bootmem(); 800 #endif 801 #ifdef CONFIG_X86_FIND_SMP_CONFIG 802 /* 803 * Find and reserve possible boot-time SMP configuration: 804 */ 805 find_smp_config(); 806 #endif 807 reserve_crashkernel(); 808 809 reserve_ibft_region(); 810 811 #ifdef CONFIG_KVM_CLOCK 812 kvmclock_init(); 813 #endif 814 815 #if defined(CONFIG_VMI) && defined(CONFIG_X86_32) 816 /* 817 * Must be after max_low_pfn is determined, and before kernel 818 * pagetables are setup. 819 */ 820 vmi_init(); 821 #endif 822 823 paravirt_pagetable_setup_start(swapper_pg_dir); 824 paging_init(); 825 paravirt_pagetable_setup_done(swapper_pg_dir); 826 paravirt_post_allocator_init(); 827 828 #ifdef CONFIG_X86_64 829 map_vsyscall(); 830 #endif 831 832 #ifdef CONFIG_X86_GENERICARCH 833 generic_apic_probe(); 834 #endif 835 836 early_quirks(); 837 838 /* 839 * Read APIC and some other early information from ACPI tables. 840 */ 841 acpi_boot_init(); 842 843 #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS) 844 /* 845 * get boot-time SMP configuration: 846 */ 847 if (smp_found_config) 848 get_smp_config(); 849 #endif 850 851 prefill_possible_map(); 852 #ifdef CONFIG_X86_64 853 init_cpu_to_node(); 854 #endif 855 856 init_apic_mappings(); 857 ioapic_init_mappings(); 858 859 #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) && defined(CONFIG_X86_32) 860 if (def_to_bigsmp) 861 printk(KERN_WARNING "More than 8 CPUs detected and " 862 "CONFIG_X86_PC cannot handle it.\nUse " 863 "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n"); 864 #endif 865 kvm_guest_init(); 866 867 e820_reserve_resources(); 868 e820_mark_nosave_regions(max_low_pfn); 869 870 #ifdef CONFIG_X86_32 871 request_resource(&iomem_resource, &video_ram_resource); 872 #endif 873 reserve_standard_io_resources(); 874 875 e820_setup_gap(); 876 877 #ifdef CONFIG_VT 878 #if defined(CONFIG_VGA_CONSOLE) 879 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) 880 conswitchp = &vga_con; 881 #elif defined(CONFIG_DUMMY_CONSOLE) 882 conswitchp = &dummy_con; 883 #endif 884 #endif 885 } 886