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1/*
2 * Copyright (C) 1995 Linus Torvalds
3 *
4 * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
5 *
6 * Memory region support
7 * David Parsons <orc@pell.chi.il.us>, July-August 1999
8 *
9 * Added E820 sanitization routine (removes overlapping memory regions);
10 * Brian Moyle <bmoyle@mvista.com>, February 2001
11 *
12 * Moved CPU detection code to cpu/${cpu}.c
13 * Patrick Mochel <mochel@osdl.org>, March 2002
14 *
15 * Provisions for empty E820 memory regions (reported by certain BIOSes).
16 * Alex Achenbach <xela@slit.de>, December 2002.
17 *
18 */
19
20/*
21 * This file handles the architecture-dependent parts of initialization
22 */
23
24#include <linux/sched.h>
25#include <linux/mm.h>
26#include <linux/mmzone.h>
27#include <linux/screen_info.h>
28#include <linux/ioport.h>
29#include <linux/acpi.h>
30#include <linux/sfi.h>
31#include <linux/apm_bios.h>
32#include <linux/initrd.h>
33#include <linux/bootmem.h>
34#include <linux/memblock.h>
35#include <linux/seq_file.h>
36#include <linux/console.h>
37#include <linux/root_dev.h>
38#include <linux/highmem.h>
39#include <linux/module.h>
40#include <linux/efi.h>
41#include <linux/init.h>
42#include <linux/edd.h>
43#include <linux/iscsi_ibft.h>
44#include <linux/nodemask.h>
45#include <linux/kexec.h>
46#include <linux/dmi.h>
47#include <linux/pfn.h>
48#include <linux/pci.h>
49#include <asm/pci-direct.h>
50#include <linux/init_ohci1394_dma.h>
51#include <linux/kvm_para.h>
52#include <linux/dma-contiguous.h>
53
54#include <linux/errno.h>
55#include <linux/kernel.h>
56#include <linux/stddef.h>
57#include <linux/unistd.h>
58#include <linux/ptrace.h>
59#include <linux/user.h>
60#include <linux/delay.h>
61
62#include <linux/kallsyms.h>
63#include <linux/cpufreq.h>
64#include <linux/dma-mapping.h>
65#include <linux/ctype.h>
66#include <linux/uaccess.h>
67
68#include <linux/percpu.h>
69#include <linux/crash_dump.h>
70#include <linux/tboot.h>
71
72#include <video/edid.h>
73
74#include <asm/mtrr.h>
75#include <asm/apic.h>
76#include <asm/realmode.h>
77#include <asm/e820.h>
78#include <asm/mpspec.h>
79#include <asm/setup.h>
80#include <asm/efi.h>
81#include <asm/timer.h>
82#include <asm/i8259.h>
83#include <asm/sections.h>
84#include <asm/dmi.h>
85#include <asm/io_apic.h>
86#include <asm/ist.h>
87#include <asm/setup_arch.h>
88#include <asm/bios_ebda.h>
89#include <asm/cacheflush.h>
90#include <asm/processor.h>
91#include <asm/bugs.h>
92
93#include <asm/vsyscall.h>
94#include <asm/cpu.h>
95#include <asm/desc.h>
96#include <asm/dma.h>
97#include <asm/iommu.h>
98#include <asm/gart.h>
99#include <asm/mmu_context.h>
100#include <asm/proto.h>
101
102#include <asm/paravirt.h>
103#include <asm/hypervisor.h>
104#include <asm/olpc_ofw.h>
105
106#include <asm/percpu.h>
107#include <asm/topology.h>
108#include <asm/apicdef.h>
109#include <asm/amd_nb.h>
110#ifdef CONFIG_X86_64
111#include <asm/numa_64.h>
112#endif
113#include <asm/mce.h>
114#include <asm/alternative.h>
115#include <asm/prom.h>
116
117/*
118 * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
119 * The direct mapping extends to max_pfn_mapped, so that we can directly access
120 * apertures, ACPI and other tables without having to play with fixmaps.
121 */
122unsigned long max_low_pfn_mapped;
123unsigned long max_pfn_mapped;
124
125#ifdef CONFIG_DMI
126RESERVE_BRK(dmi_alloc, 65536);
127#endif
128
129
130static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
131unsigned long _brk_end = (unsigned long)__brk_base;
132
133#ifdef CONFIG_X86_64
134int default_cpu_present_to_apicid(int mps_cpu)
135{
136 return __default_cpu_present_to_apicid(mps_cpu);
137}
138
139int default_check_phys_apicid_present(int phys_apicid)
140{
141 return __default_check_phys_apicid_present(phys_apicid);
142}
143#endif
144
145#ifndef CONFIG_DEBUG_BOOT_PARAMS
146struct boot_params __initdata boot_params;
147#else
148struct boot_params boot_params;
149#endif
150
151/*
152 * Machine setup..
153 */
154static struct resource data_resource = {
155 .name = "Kernel data",
156 .start = 0,
157 .end = 0,
158 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
159};
160
161static struct resource code_resource = {
162 .name = "Kernel code",
163 .start = 0,
164 .end = 0,
165 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
166};
167
168static struct resource bss_resource = {
169 .name = "Kernel bss",
170 .start = 0,
171 .end = 0,
172 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
173};
174
175
176#ifdef CONFIG_X86_32
177/* cpu data as detected by the assembly code in head.S */
178struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1};
179/* common cpu data for all cpus */
180struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1};
181EXPORT_SYMBOL(boot_cpu_data);
182
183unsigned int def_to_bigsmp;
184
185/* for MCA, but anyone else can use it if they want */
186unsigned int machine_id;
187unsigned int machine_submodel_id;
188unsigned int BIOS_revision;
189
190struct apm_info apm_info;
191EXPORT_SYMBOL(apm_info);
192
193#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
194 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
195struct ist_info ist_info;
196EXPORT_SYMBOL(ist_info);
197#else
198struct ist_info ist_info;
199#endif
200
201#else
202struct cpuinfo_x86 boot_cpu_data __read_mostly = {
203 .x86_phys_bits = MAX_PHYSMEM_BITS,
204};
205EXPORT_SYMBOL(boot_cpu_data);
206#endif
207
208
209#if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
210unsigned long mmu_cr4_features;
211#else
212unsigned long mmu_cr4_features = X86_CR4_PAE;
213#endif
214
215/* Boot loader ID and version as integers, for the benefit of proc_dointvec */
216int bootloader_type, bootloader_version;
217
218/*
219 * Setup options
220 */
221struct screen_info screen_info;
222EXPORT_SYMBOL(screen_info);
223struct edid_info edid_info;
224EXPORT_SYMBOL_GPL(edid_info);
225
226extern int root_mountflags;
227
228unsigned long saved_video_mode;
229
230#define RAMDISK_IMAGE_START_MASK 0x07FF
231#define RAMDISK_PROMPT_FLAG 0x8000
232#define RAMDISK_LOAD_FLAG 0x4000
233
234static char __initdata command_line[COMMAND_LINE_SIZE];
235#ifdef CONFIG_CMDLINE_BOOL
236static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
237#endif
238
239#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
240struct edd edd;
241#ifdef CONFIG_EDD_MODULE
242EXPORT_SYMBOL(edd);
243#endif
244/**
245 * copy_edd() - Copy the BIOS EDD information
246 * from boot_params into a safe place.
247 *
248 */
249static inline void __init copy_edd(void)
250{
251 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
252 sizeof(edd.mbr_signature));
253 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
254 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
255 edd.edd_info_nr = boot_params.eddbuf_entries;
256}
257#else
258static inline void __init copy_edd(void)
259{
260}
261#endif
262
263void * __init extend_brk(size_t size, size_t align)
264{
265 size_t mask = align - 1;
266 void *ret;
267
268 BUG_ON(_brk_start == 0);
269 BUG_ON(align & mask);
270
271 _brk_end = (_brk_end + mask) & ~mask;
272 BUG_ON((char *)(_brk_end + size) > __brk_limit);
273
274 ret = (void *)_brk_end;
275 _brk_end += size;
276
277 memset(ret, 0, size);
278
279 return ret;
280}
281
282#ifdef CONFIG_X86_64
283static void __init init_gbpages(void)
284{
285 if (direct_gbpages && cpu_has_gbpages)
286 printk(KERN_INFO "Using GB pages for direct mapping\n");
287 else
288 direct_gbpages = 0;
289}
290#else
291static inline void init_gbpages(void)
292{
293}
294static void __init cleanup_highmap(void)
295{
296}
297#endif
298
299static void __init reserve_brk(void)
300{
301 if (_brk_end > _brk_start)
302 memblock_reserve(__pa(_brk_start),
303 __pa(_brk_end) - __pa(_brk_start));
304
305 /* Mark brk area as locked down and no longer taking any
306 new allocations */
307 _brk_start = 0;
308}
309
310#ifdef CONFIG_BLK_DEV_INITRD
311
312#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
313static void __init relocate_initrd(void)
314{
315 /* Assume only end is not page aligned */
316 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
317 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
318 u64 area_size = PAGE_ALIGN(ramdisk_size);
319 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
320 u64 ramdisk_here;
321 unsigned long slop, clen, mapaddr;
322 char *p, *q;
323
324 /* We need to move the initrd down into lowmem */
325 ramdisk_here = memblock_find_in_range(0, end_of_lowmem, area_size,
326 PAGE_SIZE);
327
328 if (!ramdisk_here)
329 panic("Cannot find place for new RAMDISK of size %lld\n",
330 ramdisk_size);
331
332 /* Note: this includes all the lowmem currently occupied by
333 the initrd, we rely on that fact to keep the data intact. */
334 memblock_reserve(ramdisk_here, area_size);
335 initrd_start = ramdisk_here + PAGE_OFFSET;
336 initrd_end = initrd_start + ramdisk_size;
337 printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n",
338 ramdisk_here, ramdisk_here + ramdisk_size - 1);
339
340 q = (char *)initrd_start;
341
342 /* Copy any lowmem portion of the initrd */
343 if (ramdisk_image < end_of_lowmem) {
344 clen = end_of_lowmem - ramdisk_image;
345 p = (char *)__va(ramdisk_image);
346 memcpy(q, p, clen);
347 q += clen;
348 ramdisk_image += clen;
349 ramdisk_size -= clen;
350 }
351
352 /* Copy the highmem portion of the initrd */
353 while (ramdisk_size) {
354 slop = ramdisk_image & ~PAGE_MASK;
355 clen = ramdisk_size;
356 if (clen > MAX_MAP_CHUNK-slop)
357 clen = MAX_MAP_CHUNK-slop;
358 mapaddr = ramdisk_image & PAGE_MASK;
359 p = early_memremap(mapaddr, clen+slop);
360 memcpy(q, p+slop, clen);
361 early_iounmap(p, clen+slop);
362 q += clen;
363 ramdisk_image += clen;
364 ramdisk_size -= clen;
365 }
366 /* high pages is not converted by early_res_to_bootmem */
367 ramdisk_image = boot_params.hdr.ramdisk_image;
368 ramdisk_size = boot_params.hdr.ramdisk_size;
369 printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to"
370 " [mem %#010llx-%#010llx]\n",
371 ramdisk_image, ramdisk_image + ramdisk_size - 1,
372 ramdisk_here, ramdisk_here + ramdisk_size - 1);
373}
374
375static void __init reserve_initrd(void)
376{
377 /* Assume only end is not page aligned */
378 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
379 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
380 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
381 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
382
383 if (!boot_params.hdr.type_of_loader ||
384 !ramdisk_image || !ramdisk_size)
385 return; /* No initrd provided by bootloader */
386
387 initrd_start = 0;
388
389 if (ramdisk_size >= (end_of_lowmem>>1)) {
390 panic("initrd too large to handle, "
391 "disabling initrd (%lld needed, %lld available)\n",
392 ramdisk_size, end_of_lowmem>>1);
393 }
394
395 printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image,
396 ramdisk_end - 1);
397
398
399 if (ramdisk_end <= end_of_lowmem) {
400 /* All in lowmem, easy case */
401 /*
402 * don't need to reserve again, already reserved early
403 * in i386_start_kernel
404 */
405 initrd_start = ramdisk_image + PAGE_OFFSET;
406 initrd_end = initrd_start + ramdisk_size;
407 return;
408 }
409
410 relocate_initrd();
411
412 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image);
413}
414#else
415static void __init reserve_initrd(void)
416{
417}
418#endif /* CONFIG_BLK_DEV_INITRD */
419
420static void __init parse_setup_data(void)
421{
422 struct setup_data *data;
423 u64 pa_data;
424
425 if (boot_params.hdr.version < 0x0209)
426 return;
427 pa_data = boot_params.hdr.setup_data;
428 while (pa_data) {
429 u32 data_len, map_len;
430
431 map_len = max(PAGE_SIZE - (pa_data & ~PAGE_MASK),
432 (u64)sizeof(struct setup_data));
433 data = early_memremap(pa_data, map_len);
434 data_len = data->len + sizeof(struct setup_data);
435 if (data_len > map_len) {
436 early_iounmap(data, map_len);
437 data = early_memremap(pa_data, data_len);
438 map_len = data_len;
439 }
440
441 switch (data->type) {
442 case SETUP_E820_EXT:
443 parse_e820_ext(data);
444 break;
445 case SETUP_DTB:
446 add_dtb(pa_data);
447 break;
448 default:
449 break;
450 }
451 pa_data = data->next;
452 early_iounmap(data, map_len);
453 }
454}
455
456static void __init e820_reserve_setup_data(void)
457{
458 struct setup_data *data;
459 u64 pa_data;
460 int found = 0;
461
462 if (boot_params.hdr.version < 0x0209)
463 return;
464 pa_data = boot_params.hdr.setup_data;
465 while (pa_data) {
466 data = early_memremap(pa_data, sizeof(*data));
467 e820_update_range(pa_data, sizeof(*data)+data->len,
468 E820_RAM, E820_RESERVED_KERN);
469 found = 1;
470 pa_data = data->next;
471 early_iounmap(data, sizeof(*data));
472 }
473 if (!found)
474 return;
475
476 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
477 memcpy(&e820_saved, &e820, sizeof(struct e820map));
478 printk(KERN_INFO "extended physical RAM map:\n");
479 e820_print_map("reserve setup_data");
480}
481
482static void __init memblock_x86_reserve_range_setup_data(void)
483{
484 struct setup_data *data;
485 u64 pa_data;
486
487 if (boot_params.hdr.version < 0x0209)
488 return;
489 pa_data = boot_params.hdr.setup_data;
490 while (pa_data) {
491 data = early_memremap(pa_data, sizeof(*data));
492 memblock_reserve(pa_data, sizeof(*data) + data->len);
493 pa_data = data->next;
494 early_iounmap(data, sizeof(*data));
495 }
496}
497
498/*
499 * --------- Crashkernel reservation ------------------------------
500 */
501
502#ifdef CONFIG_KEXEC
503
504/*
505 * Keep the crash kernel below this limit. On 32 bits earlier kernels
506 * would limit the kernel to the low 512 MiB due to mapping restrictions.
507 * On 64 bits, kexec-tools currently limits us to 896 MiB; increase this
508 * limit once kexec-tools are fixed.
509 */
510#ifdef CONFIG_X86_32
511# define CRASH_KERNEL_ADDR_MAX (512 << 20)
512#else
513# define CRASH_KERNEL_ADDR_MAX (896 << 20)
514#endif
515
516static void __init reserve_crashkernel(void)
517{
518 unsigned long long total_mem;
519 unsigned long long crash_size, crash_base;
520 int ret;
521
522 total_mem = memblock_phys_mem_size();
523
524 ret = parse_crashkernel(boot_command_line, total_mem,
525 &crash_size, &crash_base);
526 if (ret != 0 || crash_size <= 0)
527 return;
528
529 /* 0 means: find the address automatically */
530 if (crash_base <= 0) {
531 const unsigned long long alignment = 16<<20; /* 16M */
532
533 /*
534 * kexec want bzImage is below CRASH_KERNEL_ADDR_MAX
535 */
536 crash_base = memblock_find_in_range(alignment,
537 CRASH_KERNEL_ADDR_MAX, crash_size, alignment);
538
539 if (!crash_base) {
540 pr_info("crashkernel reservation failed - No suitable area found.\n");
541 return;
542 }
543 } else {
544 unsigned long long start;
545
546 start = memblock_find_in_range(crash_base,
547 crash_base + crash_size, crash_size, 1<<20);
548 if (start != crash_base) {
549 pr_info("crashkernel reservation failed - memory is in use.\n");
550 return;
551 }
552 }
553 memblock_reserve(crash_base, crash_size);
554
555 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
556 "for crashkernel (System RAM: %ldMB)\n",
557 (unsigned long)(crash_size >> 20),
558 (unsigned long)(crash_base >> 20),
559 (unsigned long)(total_mem >> 20));
560
561 crashk_res.start = crash_base;
562 crashk_res.end = crash_base + crash_size - 1;
563 insert_resource(&iomem_resource, &crashk_res);
564}
565#else
566static void __init reserve_crashkernel(void)
567{
568}
569#endif
570
571static struct resource standard_io_resources[] = {
572 { .name = "dma1", .start = 0x00, .end = 0x1f,
573 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
574 { .name = "pic1", .start = 0x20, .end = 0x21,
575 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
576 { .name = "timer0", .start = 0x40, .end = 0x43,
577 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
578 { .name = "timer1", .start = 0x50, .end = 0x53,
579 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
580 { .name = "keyboard", .start = 0x60, .end = 0x60,
581 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
582 { .name = "keyboard", .start = 0x64, .end = 0x64,
583 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
584 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
585 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
586 { .name = "pic2", .start = 0xa0, .end = 0xa1,
587 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
588 { .name = "dma2", .start = 0xc0, .end = 0xdf,
589 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
590 { .name = "fpu", .start = 0xf0, .end = 0xff,
591 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
592};
593
594void __init reserve_standard_io_resources(void)
595{
596 int i;
597
598 /* request I/O space for devices used on all i[345]86 PCs */
599 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
600 request_resource(&ioport_resource, &standard_io_resources[i]);
601
602}
603
604static __init void reserve_ibft_region(void)
605{
606 unsigned long addr, size = 0;
607
608 addr = find_ibft_region(&size);
609
610 if (size)
611 memblock_reserve(addr, size);
612}
613
614static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10;
615
616static void __init trim_bios_range(void)
617{
618 /*
619 * A special case is the first 4Kb of memory;
620 * This is a BIOS owned area, not kernel ram, but generally
621 * not listed as such in the E820 table.
622 *
623 * This typically reserves additional memory (64KiB by default)
624 * since some BIOSes are known to corrupt low memory. See the
625 * Kconfig help text for X86_RESERVE_LOW.
626 */
627 e820_update_range(0, ALIGN(reserve_low, PAGE_SIZE),
628 E820_RAM, E820_RESERVED);
629
630 /*
631 * special case: Some BIOSen report the PC BIOS
632 * area (640->1Mb) as ram even though it is not.
633 * take them out.
634 */
635 e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1);
636 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
637}
638
639static int __init parse_reservelow(char *p)
640{
641 unsigned long long size;
642
643 if (!p)
644 return -EINVAL;
645
646 size = memparse(p, &p);
647
648 if (size < 4096)
649 size = 4096;
650
651 if (size > 640*1024)
652 size = 640*1024;
653
654 reserve_low = size;
655
656 return 0;
657}
658
659early_param("reservelow", parse_reservelow);
660
661/*
662 * Determine if we were loaded by an EFI loader. If so, then we have also been
663 * passed the efi memmap, systab, etc., so we should use these data structures
664 * for initialization. Note, the efi init code path is determined by the
665 * global efi_enabled. This allows the same kernel image to be used on existing
666 * systems (with a traditional BIOS) as well as on EFI systems.
667 */
668/*
669 * setup_arch - architecture-specific boot-time initializations
670 *
671 * Note: On x86_64, fixmaps are ready for use even before this is called.
672 */
673
674void __init setup_arch(char **cmdline_p)
675{
676#ifdef CONFIG_X86_32
677 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
678 visws_early_detect();
679
680 /*
681 * copy kernel address range established so far and switch
682 * to the proper swapper page table
683 */
684 clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY,
685 initial_page_table + KERNEL_PGD_BOUNDARY,
686 KERNEL_PGD_PTRS);
687
688 load_cr3(swapper_pg_dir);
689 __flush_tlb_all();
690#else
691 printk(KERN_INFO "Command line: %s\n", boot_command_line);
692#endif
693
694 /*
695 * If we have OLPC OFW, we might end up relocating the fixmap due to
696 * reserve_top(), so do this before touching the ioremap area.
697 */
698 olpc_ofw_detect();
699
700 early_trap_init();
701 early_cpu_init();
702 early_ioremap_init();
703
704 setup_olpc_ofw_pgd();
705
706 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
707 screen_info = boot_params.screen_info;
708 edid_info = boot_params.edid_info;
709#ifdef CONFIG_X86_32
710 apm_info.bios = boot_params.apm_bios_info;
711 ist_info = boot_params.ist_info;
712 if (boot_params.sys_desc_table.length != 0) {
713 machine_id = boot_params.sys_desc_table.table[0];
714 machine_submodel_id = boot_params.sys_desc_table.table[1];
715 BIOS_revision = boot_params.sys_desc_table.table[2];
716 }
717#endif
718 saved_video_mode = boot_params.hdr.vid_mode;
719 bootloader_type = boot_params.hdr.type_of_loader;
720 if ((bootloader_type >> 4) == 0xe) {
721 bootloader_type &= 0xf;
722 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
723 }
724 bootloader_version = bootloader_type & 0xf;
725 bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
726
727#ifdef CONFIG_BLK_DEV_RAM
728 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
729 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
730 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
731#endif
732#ifdef CONFIG_EFI
733 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
734 "EL32", 4)) {
735 efi_enabled = 1;
736 efi_64bit = false;
737 } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
738 "EL64", 4)) {
739 efi_enabled = 1;
740 efi_64bit = true;
741 }
742 if (efi_enabled && efi_memblock_x86_reserve_range())
743 efi_enabled = 0;
744#endif
745
746 x86_init.oem.arch_setup();
747
748 iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
749 setup_memory_map();
750 parse_setup_data();
751 /* update the e820_saved too */
752 e820_reserve_setup_data();
753
754 copy_edd();
755
756 if (!boot_params.hdr.root_flags)
757 root_mountflags &= ~MS_RDONLY;
758 init_mm.start_code = (unsigned long) _text;
759 init_mm.end_code = (unsigned long) _etext;
760 init_mm.end_data = (unsigned long) _edata;
761 init_mm.brk = _brk_end;
762
763 code_resource.start = virt_to_phys(_text);
764 code_resource.end = virt_to_phys(_etext)-1;
765 data_resource.start = virt_to_phys(_etext);
766 data_resource.end = virt_to_phys(_edata)-1;
767 bss_resource.start = virt_to_phys(&__bss_start);
768 bss_resource.end = virt_to_phys(&__bss_stop)-1;
769
770#ifdef CONFIG_CMDLINE_BOOL
771#ifdef CONFIG_CMDLINE_OVERRIDE
772 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
773#else
774 if (builtin_cmdline[0]) {
775 /* append boot loader cmdline to builtin */
776 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
777 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
778 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
779 }
780#endif
781#endif
782
783 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
784 *cmdline_p = command_line;
785
786 /*
787 * x86_configure_nx() is called before parse_early_param() to detect
788 * whether hardware doesn't support NX (so that the early EHCI debug
789 * console setup can safely call set_fixmap()). It may then be called
790 * again from within noexec_setup() during parsing early parameters
791 * to honor the respective command line option.
792 */
793 x86_configure_nx();
794
795 parse_early_param();
796
797 x86_report_nx();
798
799 /* after early param, so could get panic from serial */
800 memblock_x86_reserve_range_setup_data();
801
802 if (acpi_mps_check()) {
803#ifdef CONFIG_X86_LOCAL_APIC
804 disable_apic = 1;
805#endif
806 setup_clear_cpu_cap(X86_FEATURE_APIC);
807 }
808
809#ifdef CONFIG_PCI
810 if (pci_early_dump_regs)
811 early_dump_pci_devices();
812#endif
813
814 finish_e820_parsing();
815
816 if (efi_enabled)
817 efi_init();
818
819 dmi_scan_machine();
820
821 /*
822 * VMware detection requires dmi to be available, so this
823 * needs to be done after dmi_scan_machine, for the BP.
824 */
825 init_hypervisor_platform();
826
827 x86_init.resources.probe_roms();
828
829 /* after parse_early_param, so could debug it */
830 insert_resource(&iomem_resource, &code_resource);
831 insert_resource(&iomem_resource, &data_resource);
832 insert_resource(&iomem_resource, &bss_resource);
833
834 trim_bios_range();
835#ifdef CONFIG_X86_32
836 if (ppro_with_ram_bug()) {
837 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
838 E820_RESERVED);
839 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
840 printk(KERN_INFO "fixed physical RAM map:\n");
841 e820_print_map("bad_ppro");
842 }
843#else
844 early_gart_iommu_check();
845#endif
846
847 /*
848 * partially used pages are not usable - thus
849 * we are rounding upwards:
850 */
851 max_pfn = e820_end_of_ram_pfn();
852
853 /* update e820 for memory not covered by WB MTRRs */
854 mtrr_bp_init();
855 if (mtrr_trim_uncached_memory(max_pfn))
856 max_pfn = e820_end_of_ram_pfn();
857
858#ifdef CONFIG_X86_32
859 /* max_low_pfn get updated here */
860 find_low_pfn_range();
861#else
862 num_physpages = max_pfn;
863
864 check_x2apic();
865
866 /* How many end-of-memory variables you have, grandma! */
867 /* need this before calling reserve_initrd */
868 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
869 max_low_pfn = e820_end_of_low_ram_pfn();
870 else
871 max_low_pfn = max_pfn;
872
873 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
874#endif
875
876 /*
877 * Find and reserve possible boot-time SMP configuration:
878 */
879 find_smp_config();
880
881 reserve_ibft_region();
882
883 /*
884 * Need to conclude brk, before memblock_x86_fill()
885 * it could use memblock_find_in_range, could overlap with
886 * brk area.
887 */
888 reserve_brk();
889
890 cleanup_highmap();
891
892 memblock.current_limit = get_max_mapped();
893 memblock_x86_fill();
894
895 /*
896 * The EFI specification says that boot service code won't be called
897 * after ExitBootServices(). This is, in fact, a lie.
898 */
899 if (efi_enabled)
900 efi_reserve_boot_services();
901
902 /* preallocate 4k for mptable mpc */
903 early_reserve_e820_mpc_new();
904
905#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
906 setup_bios_corruption_check();
907#endif
908
909 printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n",
910 (max_pfn_mapped<<PAGE_SHIFT) - 1);
911
912 setup_real_mode();
913
914 init_gbpages();
915
916 /* max_pfn_mapped is updated here */
917 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
918 max_pfn_mapped = max_low_pfn_mapped;
919
920#ifdef CONFIG_X86_64
921 if (max_pfn > max_low_pfn) {
922 max_pfn_mapped = init_memory_mapping(1UL<<32,
923 max_pfn<<PAGE_SHIFT);
924 /* can we preseve max_low_pfn ?*/
925 max_low_pfn = max_pfn;
926 }
927#endif
928 memblock.current_limit = get_max_mapped();
929 dma_contiguous_reserve(0);
930
931 /*
932 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
933 */
934
935#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
936 if (init_ohci1394_dma_early)
937 init_ohci1394_dma_on_all_controllers();
938#endif
939 /* Allocate bigger log buffer */
940 setup_log_buf(1);
941
942 reserve_initrd();
943
944 reserve_crashkernel();
945
946 vsmp_init();
947
948 io_delay_init();
949
950 /*
951 * Parse the ACPI tables for possible boot-time SMP configuration.
952 */
953 acpi_boot_table_init();
954
955 early_acpi_boot_init();
956
957 initmem_init();
958 memblock_find_dma_reserve();
959
960#ifdef CONFIG_KVM_CLOCK
961 kvmclock_init();
962#endif
963
964 x86_init.paging.pagetable_setup_start(swapper_pg_dir);
965 paging_init();
966 x86_init.paging.pagetable_setup_done(swapper_pg_dir);
967
968 if (boot_cpu_data.cpuid_level >= 0) {
969 /* A CPU has %cr4 if and only if it has CPUID */
970 mmu_cr4_features = read_cr4();
971 if (trampoline_cr4_features)
972 *trampoline_cr4_features = mmu_cr4_features;
973 }
974
975#ifdef CONFIG_X86_32
976 /* sync back kernel address range */
977 clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY,
978 swapper_pg_dir + KERNEL_PGD_BOUNDARY,
979 KERNEL_PGD_PTRS);
980#endif
981
982 tboot_probe();
983
984#ifdef CONFIG_X86_64
985 map_vsyscall();
986#endif
987
988 generic_apic_probe();
989
990 early_quirks();
991
992 /*
993 * Read APIC and some other early information from ACPI tables.
994 */
995 acpi_boot_init();
996 sfi_init();
997 x86_dtb_init();
998
999 /*
1000 * get boot-time SMP configuration:
1001 */
1002 if (smp_found_config)
1003 get_smp_config();
1004
1005 prefill_possible_map();
1006
1007 init_cpu_to_node();
1008
1009 init_apic_mappings();
1010 if (x86_io_apic_ops.init)
1011 x86_io_apic_ops.init();
1012
1013 kvm_guest_init();
1014
1015 e820_reserve_resources();
1016 e820_mark_nosave_regions(max_low_pfn);
1017
1018 x86_init.resources.reserve_resources();
1019
1020 e820_setup_gap();
1021
1022#ifdef CONFIG_VT
1023#if defined(CONFIG_VGA_CONSOLE)
1024 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1025 conswitchp = &vga_con;
1026#elif defined(CONFIG_DUMMY_CONSOLE)
1027 conswitchp = &dummy_con;
1028#endif
1029#endif
1030 x86_init.oem.banner();
1031
1032 x86_init.timers.wallclock_init();
1033
1034 x86_platform.wallclock_init();
1035
1036 mcheck_init();
1037
1038 arch_init_ideal_nops();
1039}
1040
1041#ifdef CONFIG_X86_32
1042
1043static struct resource video_ram_resource = {
1044 .name = "Video RAM area",
1045 .start = 0xa0000,
1046 .end = 0xbffff,
1047 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
1048};
1049
1050void __init i386_reserve_resources(void)
1051{
1052 request_resource(&iomem_resource, &video_ram_resource);
1053 reserve_standard_io_resources();
1054}
1055
1056#endif /* CONFIG_X86_32 */
1/*
2 * Copyright (C) 1995 Linus Torvalds
3 *
4 * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
5 *
6 * Memory region support
7 * David Parsons <orc@pell.chi.il.us>, July-August 1999
8 *
9 * Added E820 sanitization routine (removes overlapping memory regions);
10 * Brian Moyle <bmoyle@mvista.com>, February 2001
11 *
12 * Moved CPU detection code to cpu/${cpu}.c
13 * Patrick Mochel <mochel@osdl.org>, March 2002
14 *
15 * Provisions for empty E820 memory regions (reported by certain BIOSes).
16 * Alex Achenbach <xela@slit.de>, December 2002.
17 *
18 */
19
20/*
21 * This file handles the architecture-dependent parts of initialization
22 */
23
24#include <linux/sched.h>
25#include <linux/mm.h>
26#include <linux/mmzone.h>
27#include <linux/screen_info.h>
28#include <linux/ioport.h>
29#include <linux/acpi.h>
30#include <linux/sfi.h>
31#include <linux/apm_bios.h>
32#include <linux/initrd.h>
33#include <linux/bootmem.h>
34#include <linux/memblock.h>
35#include <linux/seq_file.h>
36#include <linux/console.h>
37#include <linux/root_dev.h>
38#include <linux/highmem.h>
39#include <linux/module.h>
40#include <linux/efi.h>
41#include <linux/init.h>
42#include <linux/edd.h>
43#include <linux/iscsi_ibft.h>
44#include <linux/nodemask.h>
45#include <linux/kexec.h>
46#include <linux/dmi.h>
47#include <linux/pfn.h>
48#include <linux/pci.h>
49#include <asm/pci-direct.h>
50#include <linux/init_ohci1394_dma.h>
51#include <linux/kvm_para.h>
52#include <linux/dma-contiguous.h>
53
54#include <linux/errno.h>
55#include <linux/kernel.h>
56#include <linux/stddef.h>
57#include <linux/unistd.h>
58#include <linux/ptrace.h>
59#include <linux/user.h>
60#include <linux/delay.h>
61
62#include <linux/kallsyms.h>
63#include <linux/cpufreq.h>
64#include <linux/dma-mapping.h>
65#include <linux/ctype.h>
66#include <linux/uaccess.h>
67
68#include <linux/percpu.h>
69#include <linux/crash_dump.h>
70#include <linux/tboot.h>
71#include <linux/jiffies.h>
72
73#include <video/edid.h>
74
75#include <asm/mtrr.h>
76#include <asm/apic.h>
77#include <asm/realmode.h>
78#include <asm/e820.h>
79#include <asm/mpspec.h>
80#include <asm/setup.h>
81#include <asm/efi.h>
82#include <asm/timer.h>
83#include <asm/i8259.h>
84#include <asm/sections.h>
85#include <asm/io_apic.h>
86#include <asm/ist.h>
87#include <asm/setup_arch.h>
88#include <asm/bios_ebda.h>
89#include <asm/cacheflush.h>
90#include <asm/processor.h>
91#include <asm/bugs.h>
92#include <asm/kasan.h>
93
94#include <asm/vsyscall.h>
95#include <asm/cpu.h>
96#include <asm/desc.h>
97#include <asm/dma.h>
98#include <asm/iommu.h>
99#include <asm/gart.h>
100#include <asm/mmu_context.h>
101#include <asm/proto.h>
102
103#include <asm/paravirt.h>
104#include <asm/hypervisor.h>
105#include <asm/olpc_ofw.h>
106
107#include <asm/percpu.h>
108#include <asm/topology.h>
109#include <asm/apicdef.h>
110#include <asm/amd_nb.h>
111#include <asm/mce.h>
112#include <asm/alternative.h>
113#include <asm/prom.h>
114#include <asm/microcode.h>
115#include <asm/mmu_context.h>
116
117/*
118 * max_low_pfn_mapped: highest direct mapped pfn under 4GB
119 * max_pfn_mapped: highest direct mapped pfn over 4GB
120 *
121 * The direct mapping only covers E820_RAM regions, so the ranges and gaps are
122 * represented by pfn_mapped
123 */
124unsigned long max_low_pfn_mapped;
125unsigned long max_pfn_mapped;
126
127#ifdef CONFIG_DMI
128RESERVE_BRK(dmi_alloc, 65536);
129#endif
130
131
132static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
133unsigned long _brk_end = (unsigned long)__brk_base;
134
135#ifdef CONFIG_X86_64
136int default_cpu_present_to_apicid(int mps_cpu)
137{
138 return __default_cpu_present_to_apicid(mps_cpu);
139}
140
141int default_check_phys_apicid_present(int phys_apicid)
142{
143 return __default_check_phys_apicid_present(phys_apicid);
144}
145#endif
146
147struct boot_params boot_params;
148
149/*
150 * Machine setup..
151 */
152static struct resource data_resource = {
153 .name = "Kernel data",
154 .start = 0,
155 .end = 0,
156 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
157};
158
159static struct resource code_resource = {
160 .name = "Kernel code",
161 .start = 0,
162 .end = 0,
163 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
164};
165
166static struct resource bss_resource = {
167 .name = "Kernel bss",
168 .start = 0,
169 .end = 0,
170 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
171};
172
173
174#ifdef CONFIG_X86_32
175/* cpu data as detected by the assembly code in head.S */
176struct cpuinfo_x86 new_cpu_data = {
177 .wp_works_ok = -1,
178};
179/* common cpu data for all cpus */
180struct cpuinfo_x86 boot_cpu_data __read_mostly = {
181 .wp_works_ok = -1,
182};
183EXPORT_SYMBOL(boot_cpu_data);
184
185unsigned int def_to_bigsmp;
186
187/* for MCA, but anyone else can use it if they want */
188unsigned int machine_id;
189unsigned int machine_submodel_id;
190unsigned int BIOS_revision;
191
192struct apm_info apm_info;
193EXPORT_SYMBOL(apm_info);
194
195#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
196 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
197struct ist_info ist_info;
198EXPORT_SYMBOL(ist_info);
199#else
200struct ist_info ist_info;
201#endif
202
203#else
204struct cpuinfo_x86 boot_cpu_data __read_mostly = {
205 .x86_phys_bits = MAX_PHYSMEM_BITS,
206};
207EXPORT_SYMBOL(boot_cpu_data);
208#endif
209
210
211#if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
212__visible unsigned long mmu_cr4_features;
213#else
214__visible unsigned long mmu_cr4_features = X86_CR4_PAE;
215#endif
216
217/* Boot loader ID and version as integers, for the benefit of proc_dointvec */
218int bootloader_type, bootloader_version;
219
220/*
221 * Setup options
222 */
223struct screen_info screen_info;
224EXPORT_SYMBOL(screen_info);
225struct edid_info edid_info;
226EXPORT_SYMBOL_GPL(edid_info);
227
228extern int root_mountflags;
229
230unsigned 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
236static char __initdata command_line[COMMAND_LINE_SIZE];
237#ifdef CONFIG_CMDLINE_BOOL
238static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
239#endif
240
241#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
242struct edd edd;
243#ifdef CONFIG_EDD_MODULE
244EXPORT_SYMBOL(edd);
245#endif
246/**
247 * copy_edd() - Copy the BIOS EDD information
248 * from boot_params into a safe place.
249 *
250 */
251static inline void __init 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
260static inline void __init copy_edd(void)
261{
262}
263#endif
264
265void * __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#ifdef CONFIG_X86_32
285static void __init cleanup_highmap(void)
286{
287}
288#endif
289
290static void __init reserve_brk(void)
291{
292 if (_brk_end > _brk_start)
293 memblock_reserve(__pa_symbol(_brk_start),
294 _brk_end - _brk_start);
295
296 /* Mark brk area as locked down and no longer taking any
297 new allocations */
298 _brk_start = 0;
299}
300
301u64 relocated_ramdisk;
302
303#ifdef CONFIG_BLK_DEV_INITRD
304
305static u64 __init get_ramdisk_image(void)
306{
307 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
308
309 ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32;
310
311 return ramdisk_image;
312}
313static u64 __init get_ramdisk_size(void)
314{
315 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
316
317 ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32;
318
319 return ramdisk_size;
320}
321
322static void __init relocate_initrd(void)
323{
324 /* Assume only end is not page aligned */
325 u64 ramdisk_image = get_ramdisk_image();
326 u64 ramdisk_size = get_ramdisk_size();
327 u64 area_size = PAGE_ALIGN(ramdisk_size);
328
329 /* We need to move the initrd down into directly mapped mem */
330 relocated_ramdisk = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped),
331 area_size, PAGE_SIZE);
332
333 if (!relocated_ramdisk)
334 panic("Cannot find place for new RAMDISK of size %lld\n",
335 ramdisk_size);
336
337 /* Note: this includes all the mem currently occupied by
338 the initrd, we rely on that fact to keep the data intact. */
339 memblock_reserve(relocated_ramdisk, area_size);
340 initrd_start = relocated_ramdisk + PAGE_OFFSET;
341 initrd_end = initrd_start + ramdisk_size;
342 printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n",
343 relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);
344
345 copy_from_early_mem((void *)initrd_start, ramdisk_image, ramdisk_size);
346
347 printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to"
348 " [mem %#010llx-%#010llx]\n",
349 ramdisk_image, ramdisk_image + ramdisk_size - 1,
350 relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);
351}
352
353static void __init early_reserve_initrd(void)
354{
355 /* Assume only end is not page aligned */
356 u64 ramdisk_image = get_ramdisk_image();
357 u64 ramdisk_size = get_ramdisk_size();
358 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
359
360 if (!boot_params.hdr.type_of_loader ||
361 !ramdisk_image || !ramdisk_size)
362 return; /* No initrd provided by bootloader */
363
364 memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image);
365}
366static void __init reserve_initrd(void)
367{
368 /* Assume only end is not page aligned */
369 u64 ramdisk_image = get_ramdisk_image();
370 u64 ramdisk_size = get_ramdisk_size();
371 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
372 u64 mapped_size;
373
374 if (!boot_params.hdr.type_of_loader ||
375 !ramdisk_image || !ramdisk_size)
376 return; /* No initrd provided by bootloader */
377
378 initrd_start = 0;
379
380 mapped_size = memblock_mem_size(max_pfn_mapped);
381 if (ramdisk_size >= (mapped_size>>1))
382 panic("initrd too large to handle, "
383 "disabling initrd (%lld needed, %lld available)\n",
384 ramdisk_size, mapped_size>>1);
385
386 printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image,
387 ramdisk_end - 1);
388
389 if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image),
390 PFN_DOWN(ramdisk_end))) {
391 /* All are mapped, easy case */
392 initrd_start = ramdisk_image + PAGE_OFFSET;
393 initrd_end = initrd_start + ramdisk_size;
394 return;
395 }
396
397 relocate_initrd();
398
399 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image);
400}
401#else
402static void __init early_reserve_initrd(void)
403{
404}
405static void __init reserve_initrd(void)
406{
407}
408#endif /* CONFIG_BLK_DEV_INITRD */
409
410static void __init parse_setup_data(void)
411{
412 struct setup_data *data;
413 u64 pa_data, pa_next;
414
415 pa_data = boot_params.hdr.setup_data;
416 while (pa_data) {
417 u32 data_len, data_type;
418
419 data = early_memremap(pa_data, sizeof(*data));
420 data_len = data->len + sizeof(struct setup_data);
421 data_type = data->type;
422 pa_next = data->next;
423 early_memunmap(data, sizeof(*data));
424
425 switch (data_type) {
426 case SETUP_E820_EXT:
427 parse_e820_ext(pa_data, data_len);
428 break;
429 case SETUP_DTB:
430 add_dtb(pa_data);
431 break;
432 case SETUP_EFI:
433 parse_efi_setup(pa_data, data_len);
434 break;
435 default:
436 break;
437 }
438 pa_data = pa_next;
439 }
440}
441
442static void __init e820_reserve_setup_data(void)
443{
444 struct setup_data *data;
445 u64 pa_data;
446
447 pa_data = boot_params.hdr.setup_data;
448 if (!pa_data)
449 return;
450
451 while (pa_data) {
452 data = early_memremap(pa_data, sizeof(*data));
453 e820_update_range(pa_data, sizeof(*data)+data->len,
454 E820_RAM, E820_RESERVED_KERN);
455 pa_data = data->next;
456 early_memunmap(data, sizeof(*data));
457 }
458
459 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
460 memcpy(&e820_saved, &e820, sizeof(struct e820map));
461 printk(KERN_INFO "extended physical RAM map:\n");
462 e820_print_map("reserve setup_data");
463}
464
465static void __init memblock_x86_reserve_range_setup_data(void)
466{
467 struct setup_data *data;
468 u64 pa_data;
469
470 pa_data = boot_params.hdr.setup_data;
471 while (pa_data) {
472 data = early_memremap(pa_data, sizeof(*data));
473 memblock_reserve(pa_data, sizeof(*data) + data->len);
474 pa_data = data->next;
475 early_memunmap(data, sizeof(*data));
476 }
477}
478
479/*
480 * --------- Crashkernel reservation ------------------------------
481 */
482
483#ifdef CONFIG_KEXEC_CORE
484
485/* 16M alignment for crash kernel regions */
486#define CRASH_ALIGN (16 << 20)
487
488/*
489 * Keep the crash kernel below this limit. On 32 bits earlier kernels
490 * would limit the kernel to the low 512 MiB due to mapping restrictions.
491 * On 64bit, old kexec-tools need to under 896MiB.
492 */
493#ifdef CONFIG_X86_32
494# define CRASH_ADDR_LOW_MAX (512 << 20)
495# define CRASH_ADDR_HIGH_MAX (512 << 20)
496#else
497# define CRASH_ADDR_LOW_MAX (896UL << 20)
498# define CRASH_ADDR_HIGH_MAX MAXMEM
499#endif
500
501static int __init reserve_crashkernel_low(void)
502{
503#ifdef CONFIG_X86_64
504 unsigned long long base, low_base = 0, low_size = 0;
505 unsigned long total_low_mem;
506 int ret;
507
508 total_low_mem = memblock_mem_size(1UL << (32 - PAGE_SHIFT));
509
510 /* crashkernel=Y,low */
511 ret = parse_crashkernel_low(boot_command_line, total_low_mem, &low_size, &base);
512 if (ret) {
513 /*
514 * two parts from lib/swiotlb.c:
515 * -swiotlb size: user-specified with swiotlb= or default.
516 *
517 * -swiotlb overflow buffer: now hardcoded to 32k. We round it
518 * to 8M for other buffers that may need to stay low too. Also
519 * make sure we allocate enough extra low memory so that we
520 * don't run out of DMA buffers for 32-bit devices.
521 */
522 low_size = max(swiotlb_size_or_default() + (8UL << 20), 256UL << 20);
523 } else {
524 /* passed with crashkernel=0,low ? */
525 if (!low_size)
526 return 0;
527 }
528
529 low_base = memblock_find_in_range(low_size, 1ULL << 32, low_size, CRASH_ALIGN);
530 if (!low_base) {
531 pr_err("Cannot reserve %ldMB crashkernel low memory, please try smaller size.\n",
532 (unsigned long)(low_size >> 20));
533 return -ENOMEM;
534 }
535
536 ret = memblock_reserve(low_base, low_size);
537 if (ret) {
538 pr_err("%s: Error reserving crashkernel low memblock.\n", __func__);
539 return ret;
540 }
541
542 pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (System low RAM: %ldMB)\n",
543 (unsigned long)(low_size >> 20),
544 (unsigned long)(low_base >> 20),
545 (unsigned long)(total_low_mem >> 20));
546
547 crashk_low_res.start = low_base;
548 crashk_low_res.end = low_base + low_size - 1;
549 insert_resource(&iomem_resource, &crashk_low_res);
550#endif
551 return 0;
552}
553
554static void __init reserve_crashkernel(void)
555{
556 unsigned long long crash_size, crash_base, total_mem;
557 bool high = false;
558 int ret;
559
560 total_mem = memblock_phys_mem_size();
561
562 /* crashkernel=XM */
563 ret = parse_crashkernel(boot_command_line, total_mem, &crash_size, &crash_base);
564 if (ret != 0 || crash_size <= 0) {
565 /* crashkernel=X,high */
566 ret = parse_crashkernel_high(boot_command_line, total_mem,
567 &crash_size, &crash_base);
568 if (ret != 0 || crash_size <= 0)
569 return;
570 high = true;
571 }
572
573 /* 0 means: find the address automatically */
574 if (crash_base <= 0) {
575 /*
576 * kexec want bzImage is below CRASH_KERNEL_ADDR_MAX
577 */
578 crash_base = memblock_find_in_range(CRASH_ALIGN,
579 high ? CRASH_ADDR_HIGH_MAX
580 : CRASH_ADDR_LOW_MAX,
581 crash_size, CRASH_ALIGN);
582 if (!crash_base) {
583 pr_info("crashkernel reservation failed - No suitable area found.\n");
584 return;
585 }
586
587 } else {
588 unsigned long long start;
589
590 start = memblock_find_in_range(crash_base,
591 crash_base + crash_size,
592 crash_size, 1 << 20);
593 if (start != crash_base) {
594 pr_info("crashkernel reservation failed - memory is in use.\n");
595 return;
596 }
597 }
598 ret = memblock_reserve(crash_base, crash_size);
599 if (ret) {
600 pr_err("%s: Error reserving crashkernel memblock.\n", __func__);
601 return;
602 }
603
604 if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) {
605 memblock_free(crash_base, crash_size);
606 return;
607 }
608
609 pr_info("Reserving %ldMB of memory at %ldMB for crashkernel (System RAM: %ldMB)\n",
610 (unsigned long)(crash_size >> 20),
611 (unsigned long)(crash_base >> 20),
612 (unsigned long)(total_mem >> 20));
613
614 crashk_res.start = crash_base;
615 crashk_res.end = crash_base + crash_size - 1;
616 insert_resource(&iomem_resource, &crashk_res);
617}
618#else
619static void __init reserve_crashkernel(void)
620{
621}
622#endif
623
624static struct resource standard_io_resources[] = {
625 { .name = "dma1", .start = 0x00, .end = 0x1f,
626 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
627 { .name = "pic1", .start = 0x20, .end = 0x21,
628 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
629 { .name = "timer0", .start = 0x40, .end = 0x43,
630 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
631 { .name = "timer1", .start = 0x50, .end = 0x53,
632 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
633 { .name = "keyboard", .start = 0x60, .end = 0x60,
634 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
635 { .name = "keyboard", .start = 0x64, .end = 0x64,
636 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
637 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
638 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
639 { .name = "pic2", .start = 0xa0, .end = 0xa1,
640 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
641 { .name = "dma2", .start = 0xc0, .end = 0xdf,
642 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
643 { .name = "fpu", .start = 0xf0, .end = 0xff,
644 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
645};
646
647void __init reserve_standard_io_resources(void)
648{
649 int i;
650
651 /* request I/O space for devices used on all i[345]86 PCs */
652 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
653 request_resource(&ioport_resource, &standard_io_resources[i]);
654
655}
656
657static __init void reserve_ibft_region(void)
658{
659 unsigned long addr, size = 0;
660
661 addr = find_ibft_region(&size);
662
663 if (size)
664 memblock_reserve(addr, size);
665}
666
667static bool __init snb_gfx_workaround_needed(void)
668{
669#ifdef CONFIG_PCI
670 int i;
671 u16 vendor, devid;
672 static const __initconst u16 snb_ids[] = {
673 0x0102,
674 0x0112,
675 0x0122,
676 0x0106,
677 0x0116,
678 0x0126,
679 0x010a,
680 };
681
682 /* Assume no if something weird is going on with PCI */
683 if (!early_pci_allowed())
684 return false;
685
686 vendor = read_pci_config_16(0, 2, 0, PCI_VENDOR_ID);
687 if (vendor != 0x8086)
688 return false;
689
690 devid = read_pci_config_16(0, 2, 0, PCI_DEVICE_ID);
691 for (i = 0; i < ARRAY_SIZE(snb_ids); i++)
692 if (devid == snb_ids[i])
693 return true;
694#endif
695
696 return false;
697}
698
699/*
700 * Sandy Bridge graphics has trouble with certain ranges, exclude
701 * them from allocation.
702 */
703static void __init trim_snb_memory(void)
704{
705 static const __initconst unsigned long bad_pages[] = {
706 0x20050000,
707 0x20110000,
708 0x20130000,
709 0x20138000,
710 0x40004000,
711 };
712 int i;
713
714 if (!snb_gfx_workaround_needed())
715 return;
716
717 printk(KERN_DEBUG "reserving inaccessible SNB gfx pages\n");
718
719 /*
720 * Reserve all memory below the 1 MB mark that has not
721 * already been reserved.
722 */
723 memblock_reserve(0, 1<<20);
724
725 for (i = 0; i < ARRAY_SIZE(bad_pages); i++) {
726 if (memblock_reserve(bad_pages[i], PAGE_SIZE))
727 printk(KERN_WARNING "failed to reserve 0x%08lx\n",
728 bad_pages[i]);
729 }
730}
731
732/*
733 * Here we put platform-specific memory range workarounds, i.e.
734 * memory known to be corrupt or otherwise in need to be reserved on
735 * specific platforms.
736 *
737 * If this gets used more widely it could use a real dispatch mechanism.
738 */
739static void __init trim_platform_memory_ranges(void)
740{
741 trim_snb_memory();
742}
743
744static void __init trim_bios_range(void)
745{
746 /*
747 * A special case is the first 4Kb of memory;
748 * This is a BIOS owned area, not kernel ram, but generally
749 * not listed as such in the E820 table.
750 *
751 * This typically reserves additional memory (64KiB by default)
752 * since some BIOSes are known to corrupt low memory. See the
753 * Kconfig help text for X86_RESERVE_LOW.
754 */
755 e820_update_range(0, PAGE_SIZE, E820_RAM, E820_RESERVED);
756
757 /*
758 * special case: Some BIOSen report the PC BIOS
759 * area (640->1Mb) as ram even though it is not.
760 * take them out.
761 */
762 e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1);
763
764 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
765}
766
767/* called before trim_bios_range() to spare extra sanitize */
768static void __init e820_add_kernel_range(void)
769{
770 u64 start = __pa_symbol(_text);
771 u64 size = __pa_symbol(_end) - start;
772
773 /*
774 * Complain if .text .data and .bss are not marked as E820_RAM and
775 * attempt to fix it by adding the range. We may have a confused BIOS,
776 * or the user may have used memmap=exactmap or memmap=xxM$yyM to
777 * exclude kernel range. If we really are running on top non-RAM,
778 * we will crash later anyways.
779 */
780 if (e820_all_mapped(start, start + size, E820_RAM))
781 return;
782
783 pr_warn(".text .data .bss are not marked as E820_RAM!\n");
784 e820_remove_range(start, size, E820_RAM, 0);
785 e820_add_region(start, size, E820_RAM);
786}
787
788static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10;
789
790static int __init parse_reservelow(char *p)
791{
792 unsigned long long size;
793
794 if (!p)
795 return -EINVAL;
796
797 size = memparse(p, &p);
798
799 if (size < 4096)
800 size = 4096;
801
802 if (size > 640*1024)
803 size = 640*1024;
804
805 reserve_low = size;
806
807 return 0;
808}
809
810early_param("reservelow", parse_reservelow);
811
812static void __init trim_low_memory_range(void)
813{
814 memblock_reserve(0, ALIGN(reserve_low, PAGE_SIZE));
815}
816
817/*
818 * Dump out kernel offset information on panic.
819 */
820static int
821dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p)
822{
823 if (kaslr_enabled()) {
824 pr_emerg("Kernel Offset: 0x%lx from 0x%lx (relocation range: 0x%lx-0x%lx)\n",
825 kaslr_offset(),
826 __START_KERNEL,
827 __START_KERNEL_map,
828 MODULES_VADDR-1);
829 } else {
830 pr_emerg("Kernel Offset: disabled\n");
831 }
832
833 return 0;
834}
835
836/*
837 * Determine if we were loaded by an EFI loader. If so, then we have also been
838 * passed the efi memmap, systab, etc., so we should use these data structures
839 * for initialization. Note, the efi init code path is determined by the
840 * global efi_enabled. This allows the same kernel image to be used on existing
841 * systems (with a traditional BIOS) as well as on EFI systems.
842 */
843/*
844 * setup_arch - architecture-specific boot-time initializations
845 *
846 * Note: On x86_64, fixmaps are ready for use even before this is called.
847 */
848
849void __init setup_arch(char **cmdline_p)
850{
851 memblock_reserve(__pa_symbol(_text),
852 (unsigned long)__bss_stop - (unsigned long)_text);
853
854 early_reserve_initrd();
855
856 /*
857 * At this point everything still needed from the boot loader
858 * or BIOS or kernel text should be early reserved or marked not
859 * RAM in e820. All other memory is free game.
860 */
861
862#ifdef CONFIG_X86_32
863 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
864
865 /*
866 * copy kernel address range established so far and switch
867 * to the proper swapper page table
868 */
869 clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY,
870 initial_page_table + KERNEL_PGD_BOUNDARY,
871 KERNEL_PGD_PTRS);
872
873 load_cr3(swapper_pg_dir);
874 /*
875 * Note: Quark X1000 CPUs advertise PGE incorrectly and require
876 * a cr3 based tlb flush, so the following __flush_tlb_all()
877 * will not flush anything because the cpu quirk which clears
878 * X86_FEATURE_PGE has not been invoked yet. Though due to the
879 * load_cr3() above the TLB has been flushed already. The
880 * quirk is invoked before subsequent calls to __flush_tlb_all()
881 * so proper operation is guaranteed.
882 */
883 __flush_tlb_all();
884#else
885 printk(KERN_INFO "Command line: %s\n", boot_command_line);
886#endif
887
888 /*
889 * If we have OLPC OFW, we might end up relocating the fixmap due to
890 * reserve_top(), so do this before touching the ioremap area.
891 */
892 olpc_ofw_detect();
893
894 early_trap_init();
895 early_cpu_init();
896 early_ioremap_init();
897
898 setup_olpc_ofw_pgd();
899
900 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
901 screen_info = boot_params.screen_info;
902 edid_info = boot_params.edid_info;
903#ifdef CONFIG_X86_32
904 apm_info.bios = boot_params.apm_bios_info;
905 ist_info = boot_params.ist_info;
906#endif
907 saved_video_mode = boot_params.hdr.vid_mode;
908 bootloader_type = boot_params.hdr.type_of_loader;
909 if ((bootloader_type >> 4) == 0xe) {
910 bootloader_type &= 0xf;
911 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
912 }
913 bootloader_version = bootloader_type & 0xf;
914 bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
915
916#ifdef CONFIG_BLK_DEV_RAM
917 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
918 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
919 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
920#endif
921#ifdef CONFIG_EFI
922 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
923 EFI32_LOADER_SIGNATURE, 4)) {
924 set_bit(EFI_BOOT, &efi.flags);
925 } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
926 EFI64_LOADER_SIGNATURE, 4)) {
927 set_bit(EFI_BOOT, &efi.flags);
928 set_bit(EFI_64BIT, &efi.flags);
929 }
930
931 if (efi_enabled(EFI_BOOT))
932 efi_memblock_x86_reserve_range();
933#endif
934
935 x86_init.oem.arch_setup();
936
937 iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
938 setup_memory_map();
939 parse_setup_data();
940
941 copy_edd();
942
943 if (!boot_params.hdr.root_flags)
944 root_mountflags &= ~MS_RDONLY;
945 init_mm.start_code = (unsigned long) _text;
946 init_mm.end_code = (unsigned long) _etext;
947 init_mm.end_data = (unsigned long) _edata;
948 init_mm.brk = _brk_end;
949
950 mpx_mm_init(&init_mm);
951
952 code_resource.start = __pa_symbol(_text);
953 code_resource.end = __pa_symbol(_etext)-1;
954 data_resource.start = __pa_symbol(_etext);
955 data_resource.end = __pa_symbol(_edata)-1;
956 bss_resource.start = __pa_symbol(__bss_start);
957 bss_resource.end = __pa_symbol(__bss_stop)-1;
958
959#ifdef CONFIG_CMDLINE_BOOL
960#ifdef CONFIG_CMDLINE_OVERRIDE
961 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
962#else
963 if (builtin_cmdline[0]) {
964 /* append boot loader cmdline to builtin */
965 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
966 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
967 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
968 }
969#endif
970#endif
971
972 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
973 *cmdline_p = command_line;
974
975 /*
976 * x86_configure_nx() is called before parse_early_param() to detect
977 * whether hardware doesn't support NX (so that the early EHCI debug
978 * console setup can safely call set_fixmap()). It may then be called
979 * again from within noexec_setup() during parsing early parameters
980 * to honor the respective command line option.
981 */
982 x86_configure_nx();
983
984 parse_early_param();
985
986 x86_report_nx();
987
988 /* after early param, so could get panic from serial */
989 memblock_x86_reserve_range_setup_data();
990
991 if (acpi_mps_check()) {
992#ifdef CONFIG_X86_LOCAL_APIC
993 disable_apic = 1;
994#endif
995 setup_clear_cpu_cap(X86_FEATURE_APIC);
996 }
997
998#ifdef CONFIG_PCI
999 if (pci_early_dump_regs)
1000 early_dump_pci_devices();
1001#endif
1002
1003 /* update the e820_saved too */
1004 e820_reserve_setup_data();
1005 finish_e820_parsing();
1006
1007 if (efi_enabled(EFI_BOOT))
1008 efi_init();
1009
1010 dmi_scan_machine();
1011 dmi_memdev_walk();
1012 dmi_set_dump_stack_arch_desc();
1013
1014 /*
1015 * VMware detection requires dmi to be available, so this
1016 * needs to be done after dmi_scan_machine, for the BP.
1017 */
1018 init_hypervisor_platform();
1019
1020 x86_init.resources.probe_roms();
1021
1022 /* after parse_early_param, so could debug it */
1023 insert_resource(&iomem_resource, &code_resource);
1024 insert_resource(&iomem_resource, &data_resource);
1025 insert_resource(&iomem_resource, &bss_resource);
1026
1027 e820_add_kernel_range();
1028 trim_bios_range();
1029#ifdef CONFIG_X86_32
1030 if (ppro_with_ram_bug()) {
1031 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
1032 E820_RESERVED);
1033 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
1034 printk(KERN_INFO "fixed physical RAM map:\n");
1035 e820_print_map("bad_ppro");
1036 }
1037#else
1038 early_gart_iommu_check();
1039#endif
1040
1041 /*
1042 * partially used pages are not usable - thus
1043 * we are rounding upwards:
1044 */
1045 max_pfn = e820_end_of_ram_pfn();
1046
1047 /* update e820 for memory not covered by WB MTRRs */
1048 mtrr_bp_init();
1049 if (mtrr_trim_uncached_memory(max_pfn))
1050 max_pfn = e820_end_of_ram_pfn();
1051
1052 max_possible_pfn = max_pfn;
1053
1054#ifdef CONFIG_X86_32
1055 /* max_low_pfn get updated here */
1056 find_low_pfn_range();
1057#else
1058 check_x2apic();
1059
1060 /* How many end-of-memory variables you have, grandma! */
1061 /* need this before calling reserve_initrd */
1062 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
1063 max_low_pfn = e820_end_of_low_ram_pfn();
1064 else
1065 max_low_pfn = max_pfn;
1066
1067 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
1068#endif
1069
1070 /*
1071 * Find and reserve possible boot-time SMP configuration:
1072 */
1073 find_smp_config();
1074
1075 reserve_ibft_region();
1076
1077 early_alloc_pgt_buf();
1078
1079 /*
1080 * Need to conclude brk, before memblock_x86_fill()
1081 * it could use memblock_find_in_range, could overlap with
1082 * brk area.
1083 */
1084 reserve_brk();
1085
1086 cleanup_highmap();
1087
1088 memblock_set_current_limit(ISA_END_ADDRESS);
1089 memblock_x86_fill();
1090
1091 if (efi_enabled(EFI_BOOT)) {
1092 efi_fake_memmap();
1093 efi_find_mirror();
1094 }
1095
1096 /*
1097 * The EFI specification says that boot service code won't be called
1098 * after ExitBootServices(). This is, in fact, a lie.
1099 */
1100 if (efi_enabled(EFI_MEMMAP))
1101 efi_reserve_boot_services();
1102
1103 /* preallocate 4k for mptable mpc */
1104 early_reserve_e820_mpc_new();
1105
1106#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
1107 setup_bios_corruption_check();
1108#endif
1109
1110#ifdef CONFIG_X86_32
1111 printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n",
1112 (max_pfn_mapped<<PAGE_SHIFT) - 1);
1113#endif
1114
1115 reserve_real_mode();
1116
1117 trim_platform_memory_ranges();
1118 trim_low_memory_range();
1119
1120 init_mem_mapping();
1121
1122 early_trap_pf_init();
1123
1124 setup_real_mode();
1125
1126 memblock_set_current_limit(get_max_mapped());
1127
1128 /*
1129 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
1130 */
1131
1132#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
1133 if (init_ohci1394_dma_early)
1134 init_ohci1394_dma_on_all_controllers();
1135#endif
1136 /* Allocate bigger log buffer */
1137 setup_log_buf(1);
1138
1139 reserve_initrd();
1140
1141#if defined(CONFIG_ACPI) && defined(CONFIG_BLK_DEV_INITRD)
1142 acpi_initrd_override((void *)initrd_start, initrd_end - initrd_start);
1143#endif
1144
1145 vsmp_init();
1146
1147 io_delay_init();
1148
1149 /*
1150 * Parse the ACPI tables for possible boot-time SMP configuration.
1151 */
1152 acpi_boot_table_init();
1153
1154 early_acpi_boot_init();
1155
1156 initmem_init();
1157 dma_contiguous_reserve(max_pfn_mapped << PAGE_SHIFT);
1158
1159 /*
1160 * Reserve memory for crash kernel after SRAT is parsed so that it
1161 * won't consume hotpluggable memory.
1162 */
1163 reserve_crashkernel();
1164
1165 memblock_find_dma_reserve();
1166
1167#ifdef CONFIG_KVM_GUEST
1168 kvmclock_init();
1169#endif
1170
1171 x86_init.paging.pagetable_init();
1172
1173 kasan_init();
1174
1175 if (boot_cpu_data.cpuid_level >= 0) {
1176 /* A CPU has %cr4 if and only if it has CPUID */
1177 mmu_cr4_features = __read_cr4();
1178 if (trampoline_cr4_features)
1179 *trampoline_cr4_features = mmu_cr4_features;
1180 }
1181
1182#ifdef CONFIG_X86_32
1183 /* sync back kernel address range */
1184 clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY,
1185 swapper_pg_dir + KERNEL_PGD_BOUNDARY,
1186 KERNEL_PGD_PTRS);
1187
1188 /*
1189 * sync back low identity map too. It is used for example
1190 * in the 32-bit EFI stub.
1191 */
1192 clone_pgd_range(initial_page_table,
1193 swapper_pg_dir + KERNEL_PGD_BOUNDARY,
1194 min(KERNEL_PGD_PTRS, KERNEL_PGD_BOUNDARY));
1195#endif
1196
1197 tboot_probe();
1198
1199 map_vsyscall();
1200
1201 generic_apic_probe();
1202
1203 early_quirks();
1204
1205 /*
1206 * Read APIC and some other early information from ACPI tables.
1207 */
1208 acpi_boot_init();
1209 sfi_init();
1210 x86_dtb_init();
1211
1212 /*
1213 * get boot-time SMP configuration:
1214 */
1215 if (smp_found_config)
1216 get_smp_config();
1217
1218 prefill_possible_map();
1219
1220 init_cpu_to_node();
1221
1222 init_apic_mappings();
1223 io_apic_init_mappings();
1224
1225 kvm_guest_init();
1226
1227 e820_reserve_resources();
1228 e820_mark_nosave_regions(max_low_pfn);
1229
1230 x86_init.resources.reserve_resources();
1231
1232 e820_setup_gap();
1233
1234#ifdef CONFIG_VT
1235#if defined(CONFIG_VGA_CONSOLE)
1236 if (!efi_enabled(EFI_BOOT) || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1237 conswitchp = &vga_con;
1238#elif defined(CONFIG_DUMMY_CONSOLE)
1239 conswitchp = &dummy_con;
1240#endif
1241#endif
1242 x86_init.oem.banner();
1243
1244 x86_init.timers.wallclock_init();
1245
1246 mcheck_init();
1247
1248 arch_init_ideal_nops();
1249
1250 register_refined_jiffies(CLOCK_TICK_RATE);
1251
1252#ifdef CONFIG_EFI
1253 if (efi_enabled(EFI_BOOT))
1254 efi_apply_memmap_quirks();
1255#endif
1256}
1257
1258#ifdef CONFIG_X86_32
1259
1260static struct resource video_ram_resource = {
1261 .name = "Video RAM area",
1262 .start = 0xa0000,
1263 .end = 0xbffff,
1264 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
1265};
1266
1267void __init i386_reserve_resources(void)
1268{
1269 request_resource(&iomem_resource, &video_ram_resource);
1270 reserve_standard_io_resources();
1271}
1272
1273#endif /* CONFIG_X86_32 */
1274
1275static struct notifier_block kernel_offset_notifier = {
1276 .notifier_call = dump_kernel_offset
1277};
1278
1279static int __init register_kernel_offset_dumper(void)
1280{
1281 atomic_notifier_chain_register(&panic_notifier_list,
1282 &kernel_offset_notifier);
1283 return 0;
1284}
1285__initcall(register_kernel_offset_dumper);
1286
1287void arch_show_smap(struct seq_file *m, struct vm_area_struct *vma)
1288{
1289 if (!boot_cpu_has(X86_FEATURE_OSPKE))
1290 return;
1291
1292 seq_printf(m, "ProtectionKey: %8u\n", vma_pkey(vma));
1293}