| 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/gart.h> |
| 97 | #include <asm/mmu_context.h> |
| 98 | #include <asm/proto.h> |
| 99 | |
| 100 | #include <mach_apic.h> |
| 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 | #ifndef CONFIG_DEBUG_BOOT_PARAMS |
| 116 | struct boot_params __initdata boot_params; |
| 117 | #else |
| 118 | struct boot_params boot_params; |
| 119 | #endif |
| 120 | |
| 121 | /* |
| 122 | * Machine setup.. |
| 123 | */ |
| 124 | static struct resource data_resource = { |
| 125 | .name = "Kernel data", |
| 126 | .start = 0, |
| 127 | .end = 0, |
| 128 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM |
| 129 | }; |
| 130 | |
| 131 | static struct resource code_resource = { |
| 132 | .name = "Kernel code", |
| 133 | .start = 0, |
| 134 | .end = 0, |
| 135 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM |
| 136 | }; |
| 137 | |
| 138 | static struct resource bss_resource = { |
| 139 | .name = "Kernel bss", |
| 140 | .start = 0, |
| 141 | .end = 0, |
| 142 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM |
| 143 | }; |
| 144 | |
| 145 | |
| 146 | #ifdef CONFIG_X86_32 |
| 147 | /* This value is set up by the early boot code to point to the value |
| 148 | immediately after the boot time page tables. It contains a *physical* |
| 149 | address, and must not be in the .bss segment! */ |
| 150 | unsigned long init_pg_tables_start __initdata = ~0UL; |
| 151 | unsigned long init_pg_tables_end __initdata = ~0UL; |
| 152 | |
| 153 | static struct resource video_ram_resource = { |
| 154 | .name = "Video RAM area", |
| 155 | .start = 0xa0000, |
| 156 | .end = 0xbffff, |
| 157 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM |
| 158 | }; |
| 159 | |
| 160 | /* cpu data as detected by the assembly code in head.S */ |
| 161 | struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
| 162 | /* common cpu data for all cpus */ |
| 163 | struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; |
| 164 | EXPORT_SYMBOL(boot_cpu_data); |
| 165 | static void set_mca_bus(int x) |
| 166 | { |
| 167 | #ifdef CONFIG_MCA |
| 168 | MCA_bus = x; |
| 169 | #endif |
| 170 | } |
| 171 | |
| 172 | unsigned int def_to_bigsmp; |
| 173 | |
| 174 | /* for MCA, but anyone else can use it if they want */ |
| 175 | unsigned int machine_id; |
| 176 | unsigned int machine_submodel_id; |
| 177 | unsigned int BIOS_revision; |
| 178 | |
| 179 | struct apm_info apm_info; |
| 180 | EXPORT_SYMBOL(apm_info); |
| 181 | |
| 182 | #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ |
| 183 | defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) |
| 184 | struct ist_info ist_info; |
| 185 | EXPORT_SYMBOL(ist_info); |
| 186 | #else |
| 187 | struct ist_info ist_info; |
| 188 | #endif |
| 189 | |
| 190 | #else |
| 191 | struct cpuinfo_x86 boot_cpu_data __read_mostly; |
| 192 | EXPORT_SYMBOL(boot_cpu_data); |
| 193 | #endif |
| 194 | |
| 195 | |
| 196 | #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) |
| 197 | unsigned long mmu_cr4_features; |
| 198 | #else |
| 199 | unsigned long mmu_cr4_features = X86_CR4_PAE; |
| 200 | #endif |
| 201 | |
| 202 | /* Boot loader ID as an integer, for the benefit of proc_dointvec */ |
| 203 | int bootloader_type; |
| 204 | |
| 205 | /* |
| 206 | * Early DMI memory |
| 207 | */ |
| 208 | int dmi_alloc_index; |
| 209 | char dmi_alloc_data[DMI_MAX_DATA]; |
| 210 | |
| 211 | /* |
| 212 | * Setup options |
| 213 | */ |
| 214 | struct screen_info screen_info; |
| 215 | EXPORT_SYMBOL(screen_info); |
| 216 | struct edid_info edid_info; |
| 217 | EXPORT_SYMBOL_GPL(edid_info); |
| 218 | |
| 219 | extern int root_mountflags; |
| 220 | |
| 221 | unsigned long saved_video_mode; |
| 222 | |
| 223 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
| 224 | #define RAMDISK_PROMPT_FLAG 0x8000 |
| 225 | #define RAMDISK_LOAD_FLAG 0x4000 |
| 226 | |
| 227 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
| 228 | #ifdef CONFIG_CMDLINE_BOOL |
| 229 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; |
| 230 | #endif |
| 231 | |
| 232 | #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) |
| 233 | struct edd edd; |
| 234 | #ifdef CONFIG_EDD_MODULE |
| 235 | EXPORT_SYMBOL(edd); |
| 236 | #endif |
| 237 | /** |
| 238 | * copy_edd() - Copy the BIOS EDD information |
| 239 | * from boot_params into a safe place. |
| 240 | * |
| 241 | */ |
| 242 | static inline void copy_edd(void) |
| 243 | { |
| 244 | memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, |
| 245 | sizeof(edd.mbr_signature)); |
| 246 | memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info)); |
| 247 | edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries; |
| 248 | edd.edd_info_nr = boot_params.eddbuf_entries; |
| 249 | } |
| 250 | #else |
| 251 | static inline void copy_edd(void) |
| 252 | { |
| 253 | } |
| 254 | #endif |
| 255 | |
| 256 | #ifdef CONFIG_BLK_DEV_INITRD |
| 257 | |
| 258 | #ifdef CONFIG_X86_32 |
| 259 | |
| 260 | #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) |
| 261 | static void __init relocate_initrd(void) |
| 262 | { |
| 263 | |
| 264 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
| 265 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; |
| 266 | u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; |
| 267 | u64 ramdisk_here; |
| 268 | unsigned long slop, clen, mapaddr; |
| 269 | char *p, *q; |
| 270 | |
| 271 | /* We need to move the initrd down into lowmem */ |
| 272 | ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size, |
| 273 | PAGE_SIZE); |
| 274 | |
| 275 | if (ramdisk_here == -1ULL) |
| 276 | panic("Cannot find place for new RAMDISK of size %lld\n", |
| 277 | ramdisk_size); |
| 278 | |
| 279 | /* Note: this includes all the lowmem currently occupied by |
| 280 | the initrd, we rely on that fact to keep the data intact. */ |
| 281 | reserve_early(ramdisk_here, ramdisk_here + ramdisk_size, |
| 282 | "NEW RAMDISK"); |
| 283 | initrd_start = ramdisk_here + PAGE_OFFSET; |
| 284 | initrd_end = initrd_start + ramdisk_size; |
| 285 | printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", |
| 286 | ramdisk_here, ramdisk_here + ramdisk_size); |
| 287 | |
| 288 | q = (char *)initrd_start; |
| 289 | |
| 290 | /* Copy any lowmem portion of the initrd */ |
| 291 | if (ramdisk_image < end_of_lowmem) { |
| 292 | clen = end_of_lowmem - ramdisk_image; |
| 293 | p = (char *)__va(ramdisk_image); |
| 294 | memcpy(q, p, clen); |
| 295 | q += clen; |
| 296 | ramdisk_image += clen; |
| 297 | ramdisk_size -= clen; |
| 298 | } |
| 299 | |
| 300 | /* Copy the highmem portion of the initrd */ |
| 301 | while (ramdisk_size) { |
| 302 | slop = ramdisk_image & ~PAGE_MASK; |
| 303 | clen = ramdisk_size; |
| 304 | if (clen > MAX_MAP_CHUNK-slop) |
| 305 | clen = MAX_MAP_CHUNK-slop; |
| 306 | mapaddr = ramdisk_image & PAGE_MASK; |
| 307 | p = early_memremap(mapaddr, clen+slop); |
| 308 | memcpy(q, p+slop, clen); |
| 309 | early_iounmap(p, clen+slop); |
| 310 | q += clen; |
| 311 | ramdisk_image += clen; |
| 312 | ramdisk_size -= clen; |
| 313 | } |
| 314 | /* high pages is not converted by early_res_to_bootmem */ |
| 315 | ramdisk_image = boot_params.hdr.ramdisk_image; |
| 316 | ramdisk_size = boot_params.hdr.ramdisk_size; |
| 317 | printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" |
| 318 | " %08llx - %08llx\n", |
| 319 | ramdisk_image, ramdisk_image + ramdisk_size - 1, |
| 320 | ramdisk_here, ramdisk_here + ramdisk_size - 1); |
| 321 | } |
| 322 | #endif |
| 323 | |
| 324 | static void __init reserve_initrd(void) |
| 325 | { |
| 326 | u64 ramdisk_image = boot_params.hdr.ramdisk_image; |
| 327 | u64 ramdisk_size = boot_params.hdr.ramdisk_size; |
| 328 | u64 ramdisk_end = ramdisk_image + ramdisk_size; |
| 329 | u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; |
| 330 | |
| 331 | if (!boot_params.hdr.type_of_loader || |
| 332 | !ramdisk_image || !ramdisk_size) |
| 333 | return; /* No initrd provided by bootloader */ |
| 334 | |
| 335 | initrd_start = 0; |
| 336 | |
| 337 | if (ramdisk_size >= (end_of_lowmem>>1)) { |
| 338 | free_early(ramdisk_image, ramdisk_end); |
| 339 | printk(KERN_ERR "initrd too large to handle, " |
| 340 | "disabling initrd\n"); |
| 341 | return; |
| 342 | } |
| 343 | |
| 344 | printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, |
| 345 | ramdisk_end); |
| 346 | |
| 347 | |
| 348 | if (ramdisk_end <= end_of_lowmem) { |
| 349 | /* All in lowmem, easy case */ |
| 350 | /* |
| 351 | * don't need to reserve again, already reserved early |
| 352 | * in i386_start_kernel |
| 353 | */ |
| 354 | initrd_start = ramdisk_image + PAGE_OFFSET; |
| 355 | initrd_end = initrd_start + ramdisk_size; |
| 356 | return; |
| 357 | } |
| 358 | |
| 359 | #ifdef CONFIG_X86_32 |
| 360 | relocate_initrd(); |
| 361 | #else |
| 362 | printk(KERN_ERR "initrd extends beyond end of memory " |
| 363 | "(0x%08llx > 0x%08llx)\ndisabling initrd\n", |
| 364 | ramdisk_end, end_of_lowmem); |
| 365 | initrd_start = 0; |
| 366 | #endif |
| 367 | free_early(ramdisk_image, ramdisk_end); |
| 368 | } |
| 369 | #else |
| 370 | static void __init reserve_initrd(void) |
| 371 | { |
| 372 | } |
| 373 | #endif /* CONFIG_BLK_DEV_INITRD */ |
| 374 | |
| 375 | static void __init parse_setup_data(void) |
| 376 | { |
| 377 | struct setup_data *data; |
| 378 | u64 pa_data; |
| 379 | |
| 380 | if (boot_params.hdr.version < 0x0209) |
| 381 | return; |
| 382 | pa_data = boot_params.hdr.setup_data; |
| 383 | while (pa_data) { |
| 384 | data = early_memremap(pa_data, PAGE_SIZE); |
| 385 | switch (data->type) { |
| 386 | case SETUP_E820_EXT: |
| 387 | parse_e820_ext(data, pa_data); |
| 388 | break; |
| 389 | default: |
| 390 | break; |
| 391 | } |
| 392 | pa_data = data->next; |
| 393 | early_iounmap(data, PAGE_SIZE); |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | static void __init e820_reserve_setup_data(void) |
| 398 | { |
| 399 | struct setup_data *data; |
| 400 | u64 pa_data; |
| 401 | int found = 0; |
| 402 | |
| 403 | if (boot_params.hdr.version < 0x0209) |
| 404 | return; |
| 405 | pa_data = boot_params.hdr.setup_data; |
| 406 | while (pa_data) { |
| 407 | data = early_memremap(pa_data, sizeof(*data)); |
| 408 | e820_update_range(pa_data, sizeof(*data)+data->len, |
| 409 | E820_RAM, E820_RESERVED_KERN); |
| 410 | found = 1; |
| 411 | pa_data = data->next; |
| 412 | early_iounmap(data, sizeof(*data)); |
| 413 | } |
| 414 | if (!found) |
| 415 | return; |
| 416 | |
| 417 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
| 418 | memcpy(&e820_saved, &e820, sizeof(struct e820map)); |
| 419 | printk(KERN_INFO "extended physical RAM map:\n"); |
| 420 | e820_print_map("reserve setup_data"); |
| 421 | } |
| 422 | |
| 423 | static void __init reserve_early_setup_data(void) |
| 424 | { |
| 425 | struct setup_data *data; |
| 426 | u64 pa_data; |
| 427 | char buf[32]; |
| 428 | |
| 429 | if (boot_params.hdr.version < 0x0209) |
| 430 | return; |
| 431 | pa_data = boot_params.hdr.setup_data; |
| 432 | while (pa_data) { |
| 433 | data = early_memremap(pa_data, sizeof(*data)); |
| 434 | sprintf(buf, "setup data %x", data->type); |
| 435 | reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf); |
| 436 | pa_data = data->next; |
| 437 | early_iounmap(data, sizeof(*data)); |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | /* |
| 442 | * --------- Crashkernel reservation ------------------------------ |
| 443 | */ |
| 444 | |
| 445 | #ifdef CONFIG_KEXEC |
| 446 | |
| 447 | /** |
| 448 | * Reserve @size bytes of crashkernel memory at any suitable offset. |
| 449 | * |
| 450 | * @size: Size of the crashkernel memory to reserve. |
| 451 | * Returns the base address on success, and -1ULL on failure. |
| 452 | */ |
| 453 | static |
| 454 | unsigned long long __init find_and_reserve_crashkernel(unsigned long long size) |
| 455 | { |
| 456 | const unsigned long long alignment = 16<<20; /* 16M */ |
| 457 | unsigned long long start = 0LL; |
| 458 | |
| 459 | while (1) { |
| 460 | int ret; |
| 461 | |
| 462 | start = find_e820_area(start, ULONG_MAX, size, alignment); |
| 463 | if (start == -1ULL) |
| 464 | return start; |
| 465 | |
| 466 | /* try to reserve it */ |
| 467 | ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE); |
| 468 | if (ret >= 0) |
| 469 | return start; |
| 470 | |
| 471 | start += alignment; |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | static inline unsigned long long get_total_mem(void) |
| 476 | { |
| 477 | unsigned long long total; |
| 478 | |
| 479 | total = max_low_pfn - min_low_pfn; |
| 480 | #ifdef CONFIG_HIGHMEM |
| 481 | total += highend_pfn - highstart_pfn; |
| 482 | #endif |
| 483 | |
| 484 | return total << PAGE_SHIFT; |
| 485 | } |
| 486 | |
| 487 | static void __init reserve_crashkernel(void) |
| 488 | { |
| 489 | unsigned long long total_mem; |
| 490 | unsigned long long crash_size, crash_base; |
| 491 | int ret; |
| 492 | |
| 493 | total_mem = get_total_mem(); |
| 494 | |
| 495 | ret = parse_crashkernel(boot_command_line, total_mem, |
| 496 | &crash_size, &crash_base); |
| 497 | if (ret != 0 || crash_size <= 0) |
| 498 | return; |
| 499 | |
| 500 | /* 0 means: find the address automatically */ |
| 501 | if (crash_base <= 0) { |
| 502 | crash_base = find_and_reserve_crashkernel(crash_size); |
| 503 | if (crash_base == -1ULL) { |
| 504 | pr_info("crashkernel reservation failed. " |
| 505 | "No suitable area found.\n"); |
| 506 | return; |
| 507 | } |
| 508 | } else { |
| 509 | ret = reserve_bootmem_generic(crash_base, crash_size, |
| 510 | BOOTMEM_EXCLUSIVE); |
| 511 | if (ret < 0) { |
| 512 | pr_info("crashkernel reservation failed - " |
| 513 | "memory is in use\n"); |
| 514 | return; |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " |
| 519 | "for crashkernel (System RAM: %ldMB)\n", |
| 520 | (unsigned long)(crash_size >> 20), |
| 521 | (unsigned long)(crash_base >> 20), |
| 522 | (unsigned long)(total_mem >> 20)); |
| 523 | |
| 524 | crashk_res.start = crash_base; |
| 525 | crashk_res.end = crash_base + crash_size - 1; |
| 526 | insert_resource(&iomem_resource, &crashk_res); |
| 527 | } |
| 528 | #else |
| 529 | static void __init reserve_crashkernel(void) |
| 530 | { |
| 531 | } |
| 532 | #endif |
| 533 | |
| 534 | static struct resource standard_io_resources[] = { |
| 535 | { .name = "dma1", .start = 0x00, .end = 0x1f, |
| 536 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 537 | { .name = "pic1", .start = 0x20, .end = 0x21, |
| 538 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 539 | { .name = "timer0", .start = 0x40, .end = 0x43, |
| 540 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 541 | { .name = "timer1", .start = 0x50, .end = 0x53, |
| 542 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 543 | { .name = "keyboard", .start = 0x60, .end = 0x60, |
| 544 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 545 | { .name = "keyboard", .start = 0x64, .end = 0x64, |
| 546 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 547 | { .name = "dma page reg", .start = 0x80, .end = 0x8f, |
| 548 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 549 | { .name = "pic2", .start = 0xa0, .end = 0xa1, |
| 550 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 551 | { .name = "dma2", .start = 0xc0, .end = 0xdf, |
| 552 | .flags = IORESOURCE_BUSY | IORESOURCE_IO }, |
| 553 | { .name = "fpu", .start = 0xf0, .end = 0xff, |
| 554 | .flags = IORESOURCE_BUSY | IORESOURCE_IO } |
| 555 | }; |
| 556 | |
| 557 | static void __init reserve_standard_io_resources(void) |
| 558 | { |
| 559 | int i; |
| 560 | |
| 561 | /* request I/O space for devices used on all i[345]86 PCs */ |
| 562 | for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) |
| 563 | request_resource(&ioport_resource, &standard_io_resources[i]); |
| 564 | |
| 565 | } |
| 566 | |
| 567 | /* |
| 568 | * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by |
| 569 | * is_kdump_kernel() to determine if we are booting after a panic. Hence |
| 570 | * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE. |
| 571 | */ |
| 572 | |
| 573 | #ifdef CONFIG_CRASH_DUMP |
| 574 | /* elfcorehdr= specifies the location of elf core header |
| 575 | * stored by the crashed kernel. This option will be passed |
| 576 | * by kexec loader to the capture kernel. |
| 577 | */ |
| 578 | static int __init setup_elfcorehdr(char *arg) |
| 579 | { |
| 580 | char *end; |
| 581 | if (!arg) |
| 582 | return -EINVAL; |
| 583 | elfcorehdr_addr = memparse(arg, &end); |
| 584 | return end > arg ? 0 : -EINVAL; |
| 585 | } |
| 586 | early_param("elfcorehdr", setup_elfcorehdr); |
| 587 | #endif |
| 588 | |
| 589 | static int __init default_update_genapic(void) |
| 590 | { |
| 591 | #ifdef CONFIG_X86_SMP |
| 592 | # if defined(CONFIG_X86_GENERICARCH) || defined(CONFIG_X86_64) |
| 593 | genapic->wakeup_cpu = wakeup_secondary_cpu_via_init; |
| 594 | # endif |
| 595 | #endif |
| 596 | |
| 597 | return 0; |
| 598 | } |
| 599 | |
| 600 | static struct x86_quirks default_x86_quirks __initdata = { |
| 601 | .update_genapic = default_update_genapic, |
| 602 | }; |
| 603 | |
| 604 | struct x86_quirks *x86_quirks __initdata = &default_x86_quirks; |
| 605 | |
| 606 | #ifdef CONFIG_X86_RESERVE_LOW_64K |
| 607 | static int __init dmi_low_memory_corruption(const struct dmi_system_id *d) |
| 608 | { |
| 609 | printk(KERN_NOTICE |
| 610 | "%s detected: BIOS may corrupt low RAM, working around it.\n", |
| 611 | d->ident); |
| 612 | |
| 613 | e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED); |
| 614 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); |
| 615 | |
| 616 | return 0; |
| 617 | } |
| 618 | #endif |
| 619 | |
| 620 | /* List of systems that have known low memory corruption BIOS problems */ |
| 621 | static struct dmi_system_id __initdata bad_bios_dmi_table[] = { |
| 622 | #ifdef CONFIG_X86_RESERVE_LOW_64K |
| 623 | { |
| 624 | .callback = dmi_low_memory_corruption, |
| 625 | .ident = "AMI BIOS", |
| 626 | .matches = { |
| 627 | DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."), |
| 628 | }, |
| 629 | }, |
| 630 | { |
| 631 | .callback = dmi_low_memory_corruption, |
| 632 | .ident = "Phoenix BIOS", |
| 633 | .matches = { |
| 634 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"), |
| 635 | }, |
| 636 | }, |
| 637 | #endif |
| 638 | {} |
| 639 | }; |
| 640 | |
| 641 | /* |
| 642 | * Determine if we were loaded by an EFI loader. If so, then we have also been |
| 643 | * passed the efi memmap, systab, etc., so we should use these data structures |
| 644 | * for initialization. Note, the efi init code path is determined by the |
| 645 | * global efi_enabled. This allows the same kernel image to be used on existing |
| 646 | * systems (with a traditional BIOS) as well as on EFI systems. |
| 647 | */ |
| 648 | /* |
| 649 | * setup_arch - architecture-specific boot-time initializations |
| 650 | * |
| 651 | * Note: On x86_64, fixmaps are ready for use even before this is called. |
| 652 | */ |
| 653 | |
| 654 | void __init setup_arch(char **cmdline_p) |
| 655 | { |
| 656 | #ifdef CONFIG_X86_32 |
| 657 | memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); |
| 658 | visws_early_detect(); |
| 659 | pre_setup_arch_hook(); |
| 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 | if (cpu_has_x2apic) |
| 828 | check_x2apic(); |
| 829 | |
| 830 | /* How many end-of-memory variables you have, grandma! */ |
| 831 | /* need this before calling reserve_initrd */ |
| 832 | if (max_pfn > (1UL<<(32 - PAGE_SHIFT))) |
| 833 | max_low_pfn = e820_end_of_low_ram_pfn(); |
| 834 | else |
| 835 | max_low_pfn = max_pfn; |
| 836 | |
| 837 | high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; |
| 838 | #endif |
| 839 | |
| 840 | #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION |
| 841 | setup_bios_corruption_check(); |
| 842 | #endif |
| 843 | |
| 844 | /* max_pfn_mapped is updated here */ |
| 845 | max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT); |
| 846 | max_pfn_mapped = max_low_pfn_mapped; |
| 847 | |
| 848 | #ifdef CONFIG_X86_64 |
| 849 | if (max_pfn > max_low_pfn) { |
| 850 | max_pfn_mapped = init_memory_mapping(1UL<<32, |
| 851 | max_pfn<<PAGE_SHIFT); |
| 852 | /* can we preseve max_low_pfn ?*/ |
| 853 | max_low_pfn = max_pfn; |
| 854 | } |
| 855 | #endif |
| 856 | |
| 857 | /* |
| 858 | * NOTE: On x86-32, only from this point on, fixmaps are ready for use. |
| 859 | */ |
| 860 | |
| 861 | #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT |
| 862 | if (init_ohci1394_dma_early) |
| 863 | init_ohci1394_dma_on_all_controllers(); |
| 864 | #endif |
| 865 | |
| 866 | reserve_initrd(); |
| 867 | |
| 868 | #ifdef CONFIG_X86_64 |
| 869 | vsmp_init(); |
| 870 | #endif |
| 871 | |
| 872 | io_delay_init(); |
| 873 | |
| 874 | /* |
| 875 | * Parse the ACPI tables for possible boot-time SMP configuration. |
| 876 | */ |
| 877 | acpi_boot_table_init(); |
| 878 | |
| 879 | early_acpi_boot_init(); |
| 880 | |
| 881 | #ifdef CONFIG_ACPI_NUMA |
| 882 | /* |
| 883 | * Parse SRAT to discover nodes. |
| 884 | */ |
| 885 | acpi_numa_init(); |
| 886 | #endif |
| 887 | |
| 888 | initmem_init(0, max_pfn); |
| 889 | |
| 890 | #ifdef CONFIG_ACPI_SLEEP |
| 891 | /* |
| 892 | * Reserve low memory region for sleep support. |
| 893 | */ |
| 894 | acpi_reserve_bootmem(); |
| 895 | #endif |
| 896 | #ifdef CONFIG_X86_FIND_SMP_CONFIG |
| 897 | /* |
| 898 | * Find and reserve possible boot-time SMP configuration: |
| 899 | */ |
| 900 | find_smp_config(); |
| 901 | #endif |
| 902 | reserve_crashkernel(); |
| 903 | |
| 904 | #ifdef CONFIG_X86_64 |
| 905 | /* |
| 906 | * dma32_reserve_bootmem() allocates bootmem which may conflict |
| 907 | * with the crashkernel command line, so do that after |
| 908 | * reserve_crashkernel() |
| 909 | */ |
| 910 | dma32_reserve_bootmem(); |
| 911 | #endif |
| 912 | |
| 913 | reserve_ibft_region(); |
| 914 | |
| 915 | #ifdef CONFIG_KVM_CLOCK |
| 916 | kvmclock_init(); |
| 917 | #endif |
| 918 | |
| 919 | paravirt_pagetable_setup_start(swapper_pg_dir); |
| 920 | paging_init(); |
| 921 | paravirt_pagetable_setup_done(swapper_pg_dir); |
| 922 | paravirt_post_allocator_init(); |
| 923 | |
| 924 | #ifdef CONFIG_X86_64 |
| 925 | map_vsyscall(); |
| 926 | #endif |
| 927 | |
| 928 | #ifdef CONFIG_X86_GENERICARCH |
| 929 | generic_apic_probe(); |
| 930 | #endif |
| 931 | |
| 932 | early_quirks(); |
| 933 | |
| 934 | /* |
| 935 | * Read APIC and some other early information from ACPI tables. |
| 936 | */ |
| 937 | acpi_boot_init(); |
| 938 | |
| 939 | #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS) |
| 940 | /* |
| 941 | * get boot-time SMP configuration: |
| 942 | */ |
| 943 | if (smp_found_config) |
| 944 | get_smp_config(); |
| 945 | #endif |
| 946 | |
| 947 | prefill_possible_map(); |
| 948 | |
| 949 | #ifdef CONFIG_X86_64 |
| 950 | init_cpu_to_node(); |
| 951 | #endif |
| 952 | |
| 953 | init_apic_mappings(); |
| 954 | ioapic_init_mappings(); |
| 955 | |
| 956 | /* need to wait for io_apic is mapped */ |
| 957 | probe_nr_irqs_gsi(); |
| 958 | |
| 959 | kvm_guest_init(); |
| 960 | |
| 961 | e820_reserve_resources(); |
| 962 | e820_mark_nosave_regions(max_low_pfn); |
| 963 | |
| 964 | #ifdef CONFIG_X86_32 |
| 965 | request_resource(&iomem_resource, &video_ram_resource); |
| 966 | #endif |
| 967 | reserve_standard_io_resources(); |
| 968 | |
| 969 | e820_setup_gap(); |
| 970 | |
| 971 | #ifdef CONFIG_VT |
| 972 | #if defined(CONFIG_VGA_CONSOLE) |
| 973 | if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) |
| 974 | conswitchp = &vga_con; |
| 975 | #elif defined(CONFIG_DUMMY_CONSOLE) |
| 976 | conswitchp = &dummy_con; |
| 977 | #endif |
| 978 | #endif |
| 979 | } |
| 980 | |
| 981 | |