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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
119
120
121
122
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
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
176struct cpuinfo_x86 new_cpu_data = {
177 .wp_works_ok = -1,
178};
179
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
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
218int bootloader_type, bootloader_version;
219
220
221
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
248
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
297
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
325 u64 ramdisk_image = get_ramdisk_image();
326 u64 ramdisk_size = get_ramdisk_size();
327 u64 area_size = PAGE_ALIGN(ramdisk_size);
328
329
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
338
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
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;
363
364 memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image);
365}
366static void __init reserve_initrd(void)
367{
368
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;
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
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
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
481
482
483#ifdef CONFIG_KEXEC_CORE
484
485
486#define CRASH_ALIGN (16 << 20)
487
488
489
490
491
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
511 ret = parse_crashkernel_low(boot_command_line, total_low_mem, &low_size, &base);
512 if (ret) {
513
514
515
516
517
518
519
520
521
522 low_size = max(swiotlb_size_or_default() + (8UL << 20), 256UL << 20);
523 } else {
524
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
563 ret = parse_crashkernel(boot_command_line, total_mem, &crash_size, &crash_base);
564 if (ret != 0 || crash_size <= 0) {
565
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
574 if (crash_base <= 0) {
575
576
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
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
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
701
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
721
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
734
735
736
737
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
748
749
750
751
752
753
754
755 e820_update_range(0, PAGE_SIZE, E820_RAM, E820_RESERVED);
756
757
758
759
760
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
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
775
776
777
778
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
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
838
839
840
841
842
843
844
845
846
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
858
859
860
861
862#ifdef CONFIG_X86_32
863 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
864
865
866
867
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
876
877
878
879
880
881
882
883 __flush_tlb_all();
884#else
885 printk(KERN_INFO "Command line: %s\n", boot_command_line);
886#endif
887
888
889
890
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
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
977
978
979
980
981
982 x86_configure_nx();
983
984 parse_early_param();
985
986 x86_report_nx();
987
988
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
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
1016
1017
1018 init_hypervisor_platform();
1019
1020 x86_init.resources.probe_roms();
1021
1022
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
1043
1044
1045 max_pfn = e820_end_of_ram_pfn();
1046
1047
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
1056 find_low_pfn_range();
1057#else
1058 check_x2apic();
1059
1060
1061
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
1072
1073 find_smp_config();
1074
1075 reserve_ibft_region();
1076
1077 early_alloc_pgt_buf();
1078
1079
1080
1081
1082
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
1098
1099
1100 if (efi_enabled(EFI_MEMMAP))
1101 efi_reserve_boot_services();
1102
1103
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
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
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
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
1161
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
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
1184 clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY,
1185 swapper_pg_dir + KERNEL_PGD_BOUNDARY,
1186 KERNEL_PGD_PTRS);
1187
1188
1189
1190
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
1207
1208 acpi_boot_init();
1209 sfi_init();
1210 x86_dtb_init();
1211
1212
1213
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
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}
1294