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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
115
116
117
118
119
120
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
145struct boot_params boot_params;
146
147
148
149
150static struct resource data_resource = {
151 .name = "Kernel data",
152 .start = 0,
153 .end = 0,
154 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
155};
156
157static struct resource code_resource = {
158 .name = "Kernel code",
159 .start = 0,
160 .end = 0,
161 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
162};
163
164static struct resource bss_resource = {
165 .name = "Kernel bss",
166 .start = 0,
167 .end = 0,
168 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
169};
170
171
172#ifdef CONFIG_X86_32
173
174struct cpuinfo_x86 new_cpu_data = {
175 .wp_works_ok = -1,
176};
177
178struct cpuinfo_x86 boot_cpu_data __read_mostly = {
179 .wp_works_ok = -1,
180};
181EXPORT_SYMBOL(boot_cpu_data);
182
183unsigned int def_to_bigsmp;
184
185
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)
210__visible unsigned long mmu_cr4_features;
211#else
212__visible unsigned long mmu_cr4_features = X86_CR4_PAE;
213#endif
214
215
216int bootloader_type, bootloader_version;
217
218
219
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
246
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_32
283static void __init cleanup_highmap(void)
284{
285}
286#endif
287
288static void __init reserve_brk(void)
289{
290 if (_brk_end > _brk_start)
291 memblock_reserve(__pa_symbol(_brk_start),
292 _brk_end - _brk_start);
293
294
295
296 _brk_start = 0;
297}
298
299u64 relocated_ramdisk;
300
301#ifdef CONFIG_BLK_DEV_INITRD
302
303static u64 __init get_ramdisk_image(void)
304{
305 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
306
307 ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32;
308
309 return ramdisk_image;
310}
311static u64 __init get_ramdisk_size(void)
312{
313 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
314
315 ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32;
316
317 return ramdisk_size;
318}
319
320static void __init relocate_initrd(void)
321{
322
323 u64 ramdisk_image = get_ramdisk_image();
324 u64 ramdisk_size = get_ramdisk_size();
325 u64 area_size = PAGE_ALIGN(ramdisk_size);
326
327
328 relocated_ramdisk = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped),
329 area_size, PAGE_SIZE);
330
331 if (!relocated_ramdisk)
332 panic("Cannot find place for new RAMDISK of size %lld\n",
333 ramdisk_size);
334
335
336
337 memblock_reserve(relocated_ramdisk, area_size);
338 initrd_start = relocated_ramdisk + PAGE_OFFSET;
339 initrd_end = initrd_start + ramdisk_size;
340 printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n",
341 relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);
342
343 copy_from_early_mem((void *)initrd_start, ramdisk_image, ramdisk_size);
344
345 printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to"
346 " [mem %#010llx-%#010llx]\n",
347 ramdisk_image, ramdisk_image + ramdisk_size - 1,
348 relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);
349}
350
351static void __init early_reserve_initrd(void)
352{
353
354 u64 ramdisk_image = get_ramdisk_image();
355 u64 ramdisk_size = get_ramdisk_size();
356 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
357
358 if (!boot_params.hdr.type_of_loader ||
359 !ramdisk_image || !ramdisk_size)
360 return;
361
362 memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image);
363}
364static void __init reserve_initrd(void)
365{
366
367 u64 ramdisk_image = get_ramdisk_image();
368 u64 ramdisk_size = get_ramdisk_size();
369 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
370 u64 mapped_size;
371
372 if (!boot_params.hdr.type_of_loader ||
373 !ramdisk_image || !ramdisk_size)
374 return;
375
376 initrd_start = 0;
377
378 mapped_size = memblock_mem_size(max_pfn_mapped);
379 if (ramdisk_size >= (mapped_size>>1))
380 panic("initrd too large to handle, "
381 "disabling initrd (%lld needed, %lld available)\n",
382 ramdisk_size, mapped_size>>1);
383
384 printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image,
385 ramdisk_end - 1);
386
387 if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image),
388 PFN_DOWN(ramdisk_end))) {
389
390 initrd_start = ramdisk_image + PAGE_OFFSET;
391 initrd_end = initrd_start + ramdisk_size;
392 return;
393 }
394
395 relocate_initrd();
396
397 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image);
398}
399#else
400static void __init early_reserve_initrd(void)
401{
402}
403static void __init reserve_initrd(void)
404{
405}
406#endif
407
408static void __init parse_setup_data(void)
409{
410 struct setup_data *data;
411 u64 pa_data, pa_next;
412
413 pa_data = boot_params.hdr.setup_data;
414 while (pa_data) {
415 u32 data_len, data_type;
416
417 data = early_memremap(pa_data, sizeof(*data));
418 data_len = data->len + sizeof(struct setup_data);
419 data_type = data->type;
420 pa_next = data->next;
421 early_memunmap(data, sizeof(*data));
422
423 switch (data_type) {
424 case SETUP_E820_EXT:
425 parse_e820_ext(pa_data, data_len);
426 break;
427 case SETUP_DTB:
428 add_dtb(pa_data);
429 break;
430 case SETUP_EFI:
431 parse_efi_setup(pa_data, data_len);
432 break;
433 default:
434 break;
435 }
436 pa_data = pa_next;
437 }
438}
439
440static void __init e820_reserve_setup_data(void)
441{
442 struct setup_data *data;
443 u64 pa_data;
444
445 pa_data = boot_params.hdr.setup_data;
446 if (!pa_data)
447 return;
448
449 while (pa_data) {
450 data = early_memremap(pa_data, sizeof(*data));
451 e820_update_range(pa_data, sizeof(*data)+data->len,
452 E820_RAM, E820_RESERVED_KERN);
453 pa_data = data->next;
454 early_memunmap(data, sizeof(*data));
455 }
456
457 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
458 memcpy(&e820_saved, &e820, sizeof(struct e820map));
459 printk(KERN_INFO "extended physical RAM map:\n");
460 e820_print_map("reserve setup_data");
461}
462
463static void __init memblock_x86_reserve_range_setup_data(void)
464{
465 struct setup_data *data;
466 u64 pa_data;
467
468 pa_data = boot_params.hdr.setup_data;
469 while (pa_data) {
470 data = early_memremap(pa_data, sizeof(*data));
471 memblock_reserve(pa_data, sizeof(*data) + data->len);
472 pa_data = data->next;
473 early_memunmap(data, sizeof(*data));
474 }
475}
476
477
478
479
480
481#ifdef CONFIG_KEXEC_CORE
482
483
484
485
486
487
488#ifdef CONFIG_X86_32
489# define CRASH_KERNEL_ADDR_LOW_MAX (512 << 20)
490# define CRASH_KERNEL_ADDR_HIGH_MAX (512 << 20)
491#else
492# define CRASH_KERNEL_ADDR_LOW_MAX (896UL<<20)
493# define CRASH_KERNEL_ADDR_HIGH_MAX MAXMEM
494#endif
495
496static void __init reserve_crashkernel_low(void)
497{
498#ifdef CONFIG_X86_64
499 const unsigned long long alignment = 16<<20;
500 unsigned long long low_base = 0, low_size = 0;
501 unsigned long total_low_mem;
502 unsigned long long base;
503 bool auto_set = false;
504 int ret;
505
506 total_low_mem = memblock_mem_size(1UL<<(32-PAGE_SHIFT));
507
508 ret = parse_crashkernel_low(boot_command_line, total_low_mem,
509 &low_size, &base);
510 if (ret != 0) {
511
512
513
514
515
516
517
518
519
520 low_size = max(swiotlb_size_or_default() + (8UL<<20), 256UL<<20);
521 auto_set = true;
522 } else {
523
524 if (!low_size)
525 return;
526 }
527
528 low_base = memblock_find_in_range(low_size, (1ULL<<32),
529 low_size, alignment);
530
531 if (!low_base) {
532 if (!auto_set)
533 pr_info("crashkernel low reservation failed - No suitable area found.\n");
534
535 return;
536 }
537
538 memblock_reserve(low_base, low_size);
539 pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (System low RAM: %ldMB)\n",
540 (unsigned long)(low_size >> 20),
541 (unsigned long)(low_base >> 20),
542 (unsigned long)(total_low_mem >> 20));
543 crashk_low_res.start = low_base;
544 crashk_low_res.end = low_base + low_size - 1;
545 insert_resource(&iomem_resource, &crashk_low_res);
546#endif
547}
548
549static void __init reserve_crashkernel(void)
550{
551 const unsigned long long alignment = 16<<20;
552 unsigned long long total_mem;
553 unsigned long long crash_size, crash_base;
554 bool high = false;
555 int ret;
556
557 total_mem = memblock_phys_mem_size();
558
559
560 ret = parse_crashkernel(boot_command_line, total_mem,
561 &crash_size, &crash_base);
562 if (ret != 0 || crash_size <= 0) {
563
564 ret = parse_crashkernel_high(boot_command_line, total_mem,
565 &crash_size, &crash_base);
566 if (ret != 0 || crash_size <= 0)
567 return;
568 high = true;
569 }
570
571
572 if (crash_base <= 0) {
573
574
575
576 crash_base = memblock_find_in_range(alignment,
577 high ? CRASH_KERNEL_ADDR_HIGH_MAX :
578 CRASH_KERNEL_ADDR_LOW_MAX,
579 crash_size, alignment);
580
581 if (!crash_base) {
582 pr_info("crashkernel reservation failed - No suitable area found.\n");
583 return;
584 }
585
586 } else {
587 unsigned long long start;
588
589 start = memblock_find_in_range(crash_base,
590 crash_base + crash_size, crash_size, 1<<20);
591 if (start != crash_base) {
592 pr_info("crashkernel reservation failed - memory is in use.\n");
593 return;
594 }
595 }
596 memblock_reserve(crash_base, crash_size);
597
598 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
599 "for crashkernel (System RAM: %ldMB)\n",
600 (unsigned long)(crash_size >> 20),
601 (unsigned long)(crash_base >> 20),
602 (unsigned long)(total_mem >> 20));
603
604 crashk_res.start = crash_base;
605 crashk_res.end = crash_base + crash_size - 1;
606 insert_resource(&iomem_resource, &crashk_res);
607
608 if (crash_base >= (1ULL<<32))
609 reserve_crashkernel_low();
610}
611#else
612static void __init reserve_crashkernel(void)
613{
614}
615#endif
616
617static struct resource standard_io_resources[] = {
618 { .name = "dma1", .start = 0x00, .end = 0x1f,
619 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
620 { .name = "pic1", .start = 0x20, .end = 0x21,
621 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
622 { .name = "timer0", .start = 0x40, .end = 0x43,
623 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
624 { .name = "timer1", .start = 0x50, .end = 0x53,
625 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
626 { .name = "keyboard", .start = 0x60, .end = 0x60,
627 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
628 { .name = "keyboard", .start = 0x64, .end = 0x64,
629 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
630 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
631 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
632 { .name = "pic2", .start = 0xa0, .end = 0xa1,
633 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
634 { .name = "dma2", .start = 0xc0, .end = 0xdf,
635 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
636 { .name = "fpu", .start = 0xf0, .end = 0xff,
637 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
638};
639
640void __init reserve_standard_io_resources(void)
641{
642 int i;
643
644
645 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
646 request_resource(&ioport_resource, &standard_io_resources[i]);
647
648}
649
650static __init void reserve_ibft_region(void)
651{
652 unsigned long addr, size = 0;
653
654 addr = find_ibft_region(&size);
655
656 if (size)
657 memblock_reserve(addr, size);
658}
659
660static bool __init snb_gfx_workaround_needed(void)
661{
662#ifdef CONFIG_PCI
663 int i;
664 u16 vendor, devid;
665 static const __initconst u16 snb_ids[] = {
666 0x0102,
667 0x0112,
668 0x0122,
669 0x0106,
670 0x0116,
671 0x0126,
672 0x010a,
673 };
674
675
676 if (!early_pci_allowed())
677 return false;
678
679 vendor = read_pci_config_16(0, 2, 0, PCI_VENDOR_ID);
680 if (vendor != 0x8086)
681 return false;
682
683 devid = read_pci_config_16(0, 2, 0, PCI_DEVICE_ID);
684 for (i = 0; i < ARRAY_SIZE(snb_ids); i++)
685 if (devid == snb_ids[i])
686 return true;
687#endif
688
689 return false;
690}
691
692
693
694
695
696static void __init trim_snb_memory(void)
697{
698 static const __initconst unsigned long bad_pages[] = {
699 0x20050000,
700 0x20110000,
701 0x20130000,
702 0x20138000,
703 0x40004000,
704 };
705 int i;
706
707 if (!snb_gfx_workaround_needed())
708 return;
709
710 printk(KERN_DEBUG "reserving inaccessible SNB gfx pages\n");
711
712
713
714
715
716 memblock_reserve(0, 1<<20);
717
718 for (i = 0; i < ARRAY_SIZE(bad_pages); i++) {
719 if (memblock_reserve(bad_pages[i], PAGE_SIZE))
720 printk(KERN_WARNING "failed to reserve 0x%08lx\n",
721 bad_pages[i]);
722 }
723}
724
725
726
727
728
729
730
731
732static void __init trim_platform_memory_ranges(void)
733{
734 trim_snb_memory();
735}
736
737static void __init trim_bios_range(void)
738{
739
740
741
742
743
744
745
746
747
748 e820_update_range(0, PAGE_SIZE, E820_RAM, E820_RESERVED);
749
750
751
752
753
754
755 e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1);
756
757 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
758}
759
760
761static void __init e820_add_kernel_range(void)
762{
763 u64 start = __pa_symbol(_text);
764 u64 size = __pa_symbol(_end) - start;
765
766
767
768
769
770
771
772
773 if (e820_all_mapped(start, start + size, E820_RAM))
774 return;
775
776 pr_warn(".text .data .bss are not marked as E820_RAM!\n");
777 e820_remove_range(start, size, E820_RAM, 0);
778 e820_add_region(start, size, E820_RAM);
779}
780
781static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10;
782
783static int __init parse_reservelow(char *p)
784{
785 unsigned long long size;
786
787 if (!p)
788 return -EINVAL;
789
790 size = memparse(p, &p);
791
792 if (size < 4096)
793 size = 4096;
794
795 if (size > 640*1024)
796 size = 640*1024;
797
798 reserve_low = size;
799
800 return 0;
801}
802
803early_param("reservelow", parse_reservelow);
804
805static void __init trim_low_memory_range(void)
806{
807 memblock_reserve(0, ALIGN(reserve_low, PAGE_SIZE));
808}
809
810
811
812
813static int
814dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p)
815{
816 if (kaslr_enabled()) {
817 pr_emerg("Kernel Offset: 0x%lx from 0x%lx (relocation range: 0x%lx-0x%lx)\n",
818 kaslr_offset(),
819 __START_KERNEL,
820 __START_KERNEL_map,
821 MODULES_VADDR-1);
822 } else {
823 pr_emerg("Kernel Offset: disabled\n");
824 }
825
826 return 0;
827}
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842void __init setup_arch(char **cmdline_p)
843{
844 memblock_reserve(__pa_symbol(_text),
845 (unsigned long)__bss_stop - (unsigned long)_text);
846
847 early_reserve_initrd();
848
849
850
851
852
853
854
855#ifdef CONFIG_X86_32
856 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
857
858
859
860
861
862 clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY,
863 initial_page_table + KERNEL_PGD_BOUNDARY,
864 KERNEL_PGD_PTRS);
865
866 load_cr3(swapper_pg_dir);
867
868
869
870
871
872
873
874
875
876 __flush_tlb_all();
877#else
878 printk(KERN_INFO "Command line: %s\n", boot_command_line);
879#endif
880
881
882
883
884
885 olpc_ofw_detect();
886
887 early_trap_init();
888 early_cpu_init();
889 early_ioremap_init();
890
891 setup_olpc_ofw_pgd();
892
893 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
894 screen_info = boot_params.screen_info;
895 edid_info = boot_params.edid_info;
896#ifdef CONFIG_X86_32
897 apm_info.bios = boot_params.apm_bios_info;
898 ist_info = boot_params.ist_info;
899#endif
900 saved_video_mode = boot_params.hdr.vid_mode;
901 bootloader_type = boot_params.hdr.type_of_loader;
902 if ((bootloader_type >> 4) == 0xe) {
903 bootloader_type &= 0xf;
904 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
905 }
906 bootloader_version = bootloader_type & 0xf;
907 bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
908
909#ifdef CONFIG_BLK_DEV_RAM
910 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
911 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
912 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
913#endif
914#ifdef CONFIG_EFI
915 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
916 EFI32_LOADER_SIGNATURE, 4)) {
917 set_bit(EFI_BOOT, &efi.flags);
918 } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
919 EFI64_LOADER_SIGNATURE, 4)) {
920 set_bit(EFI_BOOT, &efi.flags);
921 set_bit(EFI_64BIT, &efi.flags);
922 }
923
924 if (efi_enabled(EFI_BOOT))
925 efi_memblock_x86_reserve_range();
926#endif
927
928 x86_init.oem.arch_setup();
929
930 iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
931 setup_memory_map();
932 parse_setup_data();
933
934 copy_edd();
935
936 if (!boot_params.hdr.root_flags)
937 root_mountflags &= ~MS_RDONLY;
938 init_mm.start_code = (unsigned long) _text;
939 init_mm.end_code = (unsigned long) _etext;
940 init_mm.end_data = (unsigned long) _edata;
941 init_mm.brk = _brk_end;
942
943 mpx_mm_init(&init_mm);
944
945 code_resource.start = __pa_symbol(_text);
946 code_resource.end = __pa_symbol(_etext)-1;
947 data_resource.start = __pa_symbol(_etext);
948 data_resource.end = __pa_symbol(_edata)-1;
949 bss_resource.start = __pa_symbol(__bss_start);
950 bss_resource.end = __pa_symbol(__bss_stop)-1;
951
952#ifdef CONFIG_CMDLINE_BOOL
953#ifdef CONFIG_CMDLINE_OVERRIDE
954 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
955#else
956 if (builtin_cmdline[0]) {
957
958 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
959 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
960 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
961 }
962#endif
963#endif
964
965 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
966 *cmdline_p = command_line;
967
968
969
970
971
972
973
974
975 x86_configure_nx();
976
977 parse_early_param();
978
979 x86_report_nx();
980
981
982 memblock_x86_reserve_range_setup_data();
983
984 if (acpi_mps_check()) {
985#ifdef CONFIG_X86_LOCAL_APIC
986 disable_apic = 1;
987#endif
988 setup_clear_cpu_cap(X86_FEATURE_APIC);
989 }
990
991#ifdef CONFIG_PCI
992 if (pci_early_dump_regs)
993 early_dump_pci_devices();
994#endif
995
996
997 e820_reserve_setup_data();
998 finish_e820_parsing();
999
1000 if (efi_enabled(EFI_BOOT))
1001 efi_init();
1002
1003 dmi_scan_machine();
1004 dmi_memdev_walk();
1005 dmi_set_dump_stack_arch_desc();
1006
1007
1008
1009
1010
1011 init_hypervisor_platform();
1012
1013 x86_init.resources.probe_roms();
1014
1015
1016 insert_resource(&iomem_resource, &code_resource);
1017 insert_resource(&iomem_resource, &data_resource);
1018 insert_resource(&iomem_resource, &bss_resource);
1019
1020 e820_add_kernel_range();
1021 trim_bios_range();
1022#ifdef CONFIG_X86_32
1023 if (ppro_with_ram_bug()) {
1024 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
1025 E820_RESERVED);
1026 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
1027 printk(KERN_INFO "fixed physical RAM map:\n");
1028 e820_print_map("bad_ppro");
1029 }
1030#else
1031 early_gart_iommu_check();
1032#endif
1033
1034
1035
1036
1037
1038 max_pfn = e820_end_of_ram_pfn();
1039
1040
1041 mtrr_bp_init();
1042 if (mtrr_trim_uncached_memory(max_pfn))
1043 max_pfn = e820_end_of_ram_pfn();
1044
1045#ifdef CONFIG_X86_32
1046
1047 find_low_pfn_range();
1048#else
1049 check_x2apic();
1050
1051
1052
1053 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
1054 max_low_pfn = e820_end_of_low_ram_pfn();
1055 else
1056 max_low_pfn = max_pfn;
1057
1058 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
1059#endif
1060
1061
1062
1063
1064 find_smp_config();
1065
1066 reserve_ibft_region();
1067
1068 early_alloc_pgt_buf();
1069
1070
1071
1072
1073
1074
1075 reserve_brk();
1076
1077 cleanup_highmap();
1078
1079 memblock_set_current_limit(ISA_END_ADDRESS);
1080 memblock_x86_fill();
1081
1082 if (efi_enabled(EFI_BOOT))
1083 efi_find_mirror();
1084
1085
1086
1087
1088
1089 if (efi_enabled(EFI_MEMMAP))
1090 efi_reserve_boot_services();
1091
1092
1093 early_reserve_e820_mpc_new();
1094
1095#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
1096 setup_bios_corruption_check();
1097#endif
1098
1099#ifdef CONFIG_X86_32
1100 printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n",
1101 (max_pfn_mapped<<PAGE_SHIFT) - 1);
1102#endif
1103
1104 reserve_real_mode();
1105
1106 trim_platform_memory_ranges();
1107 trim_low_memory_range();
1108
1109 init_mem_mapping();
1110
1111 early_trap_pf_init();
1112
1113 setup_real_mode();
1114
1115 memblock_set_current_limit(get_max_mapped());
1116
1117
1118
1119
1120
1121#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
1122 if (init_ohci1394_dma_early)
1123 init_ohci1394_dma_on_all_controllers();
1124#endif
1125
1126 setup_log_buf(1);
1127
1128 reserve_initrd();
1129
1130#if defined(CONFIG_ACPI) && defined(CONFIG_BLK_DEV_INITRD)
1131 acpi_initrd_override((void *)initrd_start, initrd_end - initrd_start);
1132#endif
1133
1134 vsmp_init();
1135
1136 io_delay_init();
1137
1138
1139
1140
1141 acpi_boot_table_init();
1142
1143 early_acpi_boot_init();
1144
1145 initmem_init();
1146 dma_contiguous_reserve(max_pfn_mapped << PAGE_SHIFT);
1147
1148
1149
1150
1151
1152 reserve_crashkernel();
1153
1154 memblock_find_dma_reserve();
1155
1156#ifdef CONFIG_KVM_GUEST
1157 kvmclock_init();
1158#endif
1159
1160 x86_init.paging.pagetable_init();
1161
1162 kasan_init();
1163
1164 if (boot_cpu_data.cpuid_level >= 0) {
1165
1166 mmu_cr4_features = __read_cr4();
1167 if (trampoline_cr4_features)
1168 *trampoline_cr4_features = mmu_cr4_features;
1169 }
1170
1171#ifdef CONFIG_X86_32
1172
1173 clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY,
1174 swapper_pg_dir + KERNEL_PGD_BOUNDARY,
1175 KERNEL_PGD_PTRS);
1176
1177
1178
1179
1180
1181 clone_pgd_range(initial_page_table,
1182 swapper_pg_dir + KERNEL_PGD_BOUNDARY,
1183 KERNEL_PGD_PTRS);
1184#endif
1185
1186 tboot_probe();
1187
1188 map_vsyscall();
1189
1190 generic_apic_probe();
1191
1192 early_quirks();
1193
1194
1195
1196
1197 acpi_boot_init();
1198 sfi_init();
1199 x86_dtb_init();
1200
1201
1202
1203
1204 if (smp_found_config)
1205 get_smp_config();
1206
1207 prefill_possible_map();
1208
1209 init_cpu_to_node();
1210
1211 init_apic_mappings();
1212 io_apic_init_mappings();
1213
1214 kvm_guest_init();
1215
1216 e820_reserve_resources();
1217 e820_mark_nosave_regions(max_low_pfn);
1218
1219 x86_init.resources.reserve_resources();
1220
1221 e820_setup_gap();
1222
1223#ifdef CONFIG_VT
1224#if defined(CONFIG_VGA_CONSOLE)
1225 if (!efi_enabled(EFI_BOOT) || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1226 conswitchp = &vga_con;
1227#elif defined(CONFIG_DUMMY_CONSOLE)
1228 conswitchp = &dummy_con;
1229#endif
1230#endif
1231 x86_init.oem.banner();
1232
1233 x86_init.timers.wallclock_init();
1234
1235 mcheck_init();
1236
1237 arch_init_ideal_nops();
1238
1239 register_refined_jiffies(CLOCK_TICK_RATE);
1240
1241#ifdef CONFIG_EFI
1242 if (efi_enabled(EFI_BOOT))
1243 efi_apply_memmap_quirks();
1244#endif
1245}
1246
1247#ifdef CONFIG_X86_32
1248
1249static struct resource video_ram_resource = {
1250 .name = "Video RAM area",
1251 .start = 0xa0000,
1252 .end = 0xbffff,
1253 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
1254};
1255
1256void __init i386_reserve_resources(void)
1257{
1258 request_resource(&iomem_resource, &video_ram_resource);
1259 reserve_standard_io_resources();
1260}
1261
1262#endif
1263
1264static struct notifier_block kernel_offset_notifier = {
1265 .notifier_call = dump_kernel_offset
1266};
1267
1268static int __init register_kernel_offset_dumper(void)
1269{
1270 atomic_notifier_chain_register(&panic_notifier_list,
1271 &kernel_offset_notifier);
1272 return 0;
1273}
1274__initcall(register_kernel_offset_dumper);
1275