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6
7
8#include <linux/console.h>
9#include <linux/crash_dump.h>
10#include <linux/dma-map-ops.h>
11#include <linux/dmi.h>
12#include <linux/efi.h>
13#include <linux/init_ohci1394_dma.h>
14#include <linux/initrd.h>
15#include <linux/iscsi_ibft.h>
16#include <linux/memblock.h>
17#include <linux/pci.h>
18#include <linux/root_dev.h>
19#include <linux/hugetlb.h>
20#include <linux/tboot.h>
21#include <linux/usb/xhci-dbgp.h>
22#include <linux/static_call.h>
23#include <linux/swiotlb.h>
24
25#include <uapi/linux/mount.h>
26
27#include <xen/xen.h>
28
29#include <asm/apic.h>
30#include <asm/numa.h>
31#include <asm/bios_ebda.h>
32#include <asm/bugs.h>
33#include <asm/cpu.h>
34#include <asm/efi.h>
35#include <asm/gart.h>
36#include <asm/hypervisor.h>
37#include <asm/io_apic.h>
38#include <asm/kasan.h>
39#include <asm/kaslr.h>
40#include <asm/mce.h>
41#include <asm/mtrr.h>
42#include <asm/realmode.h>
43#include <asm/olpc_ofw.h>
44#include <asm/pci-direct.h>
45#include <asm/prom.h>
46#include <asm/proto.h>
47#include <asm/thermal.h>
48#include <asm/unwind.h>
49#include <asm/vsyscall.h>
50#include <linux/vmalloc.h>
51
52
53
54
55
56
57
58
59unsigned long max_low_pfn_mapped;
60unsigned long max_pfn_mapped;
61
62#ifdef CONFIG_DMI
63RESERVE_BRK(dmi_alloc, 65536);
64#endif
65
66
67
68
69
70
71
72unsigned long _brk_start = (unsigned long)__brk_base;
73unsigned long _brk_end = (unsigned long)__brk_base;
74
75struct boot_params boot_params;
76
77
78
79
80
81
82
83static struct resource rodata_resource = {
84 .name = "Kernel rodata",
85 .start = 0,
86 .end = 0,
87 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
88};
89
90static struct resource data_resource = {
91 .name = "Kernel data",
92 .start = 0,
93 .end = 0,
94 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
95};
96
97static struct resource code_resource = {
98 .name = "Kernel code",
99 .start = 0,
100 .end = 0,
101 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
102};
103
104static struct resource bss_resource = {
105 .name = "Kernel bss",
106 .start = 0,
107 .end = 0,
108 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
109};
110
111
112#ifdef CONFIG_X86_32
113
114struct cpuinfo_x86 new_cpu_data;
115
116
117struct cpuinfo_x86 boot_cpu_data __read_mostly;
118EXPORT_SYMBOL(boot_cpu_data);
119
120unsigned int def_to_bigsmp;
121
122struct apm_info apm_info;
123EXPORT_SYMBOL(apm_info);
124
125#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
126 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
127struct ist_info ist_info;
128EXPORT_SYMBOL(ist_info);
129#else
130struct ist_info ist_info;
131#endif
132
133#else
134struct cpuinfo_x86 boot_cpu_data __read_mostly;
135EXPORT_SYMBOL(boot_cpu_data);
136#endif
137
138
139#if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
140__visible unsigned long mmu_cr4_features __ro_after_init;
141#else
142__visible unsigned long mmu_cr4_features __ro_after_init = X86_CR4_PAE;
143#endif
144
145
146int bootloader_type, bootloader_version;
147
148
149
150
151struct screen_info screen_info;
152EXPORT_SYMBOL(screen_info);
153struct edid_info edid_info;
154EXPORT_SYMBOL_GPL(edid_info);
155
156extern int root_mountflags;
157
158unsigned long saved_video_mode;
159
160#define RAMDISK_IMAGE_START_MASK 0x07FF
161#define RAMDISK_PROMPT_FLAG 0x8000
162#define RAMDISK_LOAD_FLAG 0x4000
163
164static char __initdata command_line[COMMAND_LINE_SIZE];
165#ifdef CONFIG_CMDLINE_BOOL
166static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
167#endif
168
169#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
170struct edd edd;
171#ifdef CONFIG_EDD_MODULE
172EXPORT_SYMBOL(edd);
173#endif
174
175
176
177
178
179static inline void __init copy_edd(void)
180{
181 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
182 sizeof(edd.mbr_signature));
183 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
184 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
185 edd.edd_info_nr = boot_params.eddbuf_entries;
186}
187#else
188static inline void __init copy_edd(void)
189{
190}
191#endif
192
193void * __init extend_brk(size_t size, size_t align)
194{
195 size_t mask = align - 1;
196 void *ret;
197
198 BUG_ON(_brk_start == 0);
199 BUG_ON(align & mask);
200
201 _brk_end = (_brk_end + mask) & ~mask;
202 BUG_ON((char *)(_brk_end + size) > __brk_limit);
203
204 ret = (void *)_brk_end;
205 _brk_end += size;
206
207 memset(ret, 0, size);
208
209 return ret;
210}
211
212#ifdef CONFIG_X86_32
213static void __init cleanup_highmap(void)
214{
215}
216#endif
217
218static void __init reserve_brk(void)
219{
220 if (_brk_end > _brk_start)
221 memblock_reserve(__pa_symbol(_brk_start),
222 _brk_end - _brk_start);
223
224
225
226 _brk_start = 0;
227}
228
229u64 relocated_ramdisk;
230
231#ifdef CONFIG_BLK_DEV_INITRD
232
233static u64 __init get_ramdisk_image(void)
234{
235 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
236
237 ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32;
238
239 if (ramdisk_image == 0)
240 ramdisk_image = phys_initrd_start;
241
242 return ramdisk_image;
243}
244static u64 __init get_ramdisk_size(void)
245{
246 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
247
248 ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32;
249
250 if (ramdisk_size == 0)
251 ramdisk_size = phys_initrd_size;
252
253 return ramdisk_size;
254}
255
256static void __init relocate_initrd(void)
257{
258
259 u64 ramdisk_image = get_ramdisk_image();
260 u64 ramdisk_size = get_ramdisk_size();
261 u64 area_size = PAGE_ALIGN(ramdisk_size);
262
263
264 relocated_ramdisk = memblock_phys_alloc_range(area_size, PAGE_SIZE, 0,
265 PFN_PHYS(max_pfn_mapped));
266 if (!relocated_ramdisk)
267 panic("Cannot find place for new RAMDISK of size %lld\n",
268 ramdisk_size);
269
270 initrd_start = relocated_ramdisk + PAGE_OFFSET;
271 initrd_end = initrd_start + ramdisk_size;
272 printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n",
273 relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);
274
275 copy_from_early_mem((void *)initrd_start, ramdisk_image, ramdisk_size);
276
277 printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to"
278 " [mem %#010llx-%#010llx]\n",
279 ramdisk_image, ramdisk_image + ramdisk_size - 1,
280 relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);
281}
282
283static void __init early_reserve_initrd(void)
284{
285
286 u64 ramdisk_image = get_ramdisk_image();
287 u64 ramdisk_size = get_ramdisk_size();
288 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
289
290 if (!boot_params.hdr.type_of_loader ||
291 !ramdisk_image || !ramdisk_size)
292 return;
293
294 memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image);
295}
296
297static void __init reserve_initrd(void)
298{
299
300 u64 ramdisk_image = get_ramdisk_image();
301 u64 ramdisk_size = get_ramdisk_size();
302 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
303
304 if (!boot_params.hdr.type_of_loader ||
305 !ramdisk_image || !ramdisk_size)
306 return;
307
308 initrd_start = 0;
309
310 printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image,
311 ramdisk_end - 1);
312
313 if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image),
314 PFN_DOWN(ramdisk_end))) {
315
316 initrd_start = ramdisk_image + PAGE_OFFSET;
317 initrd_end = initrd_start + ramdisk_size;
318 return;
319 }
320
321 relocate_initrd();
322
323 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image);
324}
325
326#else
327static void __init early_reserve_initrd(void)
328{
329}
330static void __init reserve_initrd(void)
331{
332}
333#endif
334
335static void __init parse_setup_data(void)
336{
337 struct setup_data *data;
338 u64 pa_data, pa_next;
339
340 pa_data = boot_params.hdr.setup_data;
341 while (pa_data) {
342 u32 data_len, data_type;
343
344 data = early_memremap(pa_data, sizeof(*data));
345 data_len = data->len + sizeof(struct setup_data);
346 data_type = data->type;
347 pa_next = data->next;
348 early_memunmap(data, sizeof(*data));
349
350 switch (data_type) {
351 case SETUP_E820_EXT:
352 e820__memory_setup_extended(pa_data, data_len);
353 break;
354 case SETUP_DTB:
355 add_dtb(pa_data);
356 break;
357 case SETUP_EFI:
358 parse_efi_setup(pa_data, data_len);
359 break;
360 default:
361 break;
362 }
363 pa_data = pa_next;
364 }
365}
366
367static void __init memblock_x86_reserve_range_setup_data(void)
368{
369 struct setup_data *data;
370 u64 pa_data;
371
372 pa_data = boot_params.hdr.setup_data;
373 while (pa_data) {
374 data = early_memremap(pa_data, sizeof(*data));
375 memblock_reserve(pa_data, sizeof(*data) + data->len);
376
377 if (data->type == SETUP_INDIRECT &&
378 ((struct setup_indirect *)data->data)->type != SETUP_INDIRECT)
379 memblock_reserve(((struct setup_indirect *)data->data)->addr,
380 ((struct setup_indirect *)data->data)->len);
381
382 pa_data = data->next;
383 early_memunmap(data, sizeof(*data));
384 }
385}
386
387
388
389
390
391#ifdef CONFIG_KEXEC_CORE
392
393
394#define CRASH_ALIGN SZ_16M
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409#ifdef CONFIG_X86_32
410# define CRASH_ADDR_LOW_MAX SZ_512M
411# define CRASH_ADDR_HIGH_MAX SZ_512M
412#else
413# define CRASH_ADDR_LOW_MAX SZ_4G
414# define CRASH_ADDR_HIGH_MAX SZ_64T
415#endif
416
417static int __init reserve_crashkernel_low(void)
418{
419#ifdef CONFIG_X86_64
420 unsigned long long base, low_base = 0, low_size = 0;
421 unsigned long low_mem_limit;
422 int ret;
423
424 low_mem_limit = min(memblock_phys_mem_size(), CRASH_ADDR_LOW_MAX);
425
426
427 ret = parse_crashkernel_low(boot_command_line, low_mem_limit, &low_size, &base);
428 if (ret) {
429
430
431
432
433
434
435
436
437
438 low_size = max(swiotlb_size_or_default() + (8UL << 20), 256UL << 20);
439 } else {
440
441 if (!low_size)
442 return 0;
443 }
444
445 low_base = memblock_phys_alloc_range(low_size, CRASH_ALIGN, 0, CRASH_ADDR_LOW_MAX);
446 if (!low_base) {
447 pr_err("Cannot reserve %ldMB crashkernel low memory, please try smaller size.\n",
448 (unsigned long)(low_size >> 20));
449 return -ENOMEM;
450 }
451
452 pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (low RAM limit: %ldMB)\n",
453 (unsigned long)(low_size >> 20),
454 (unsigned long)(low_base >> 20),
455 (unsigned long)(low_mem_limit >> 20));
456
457 crashk_low_res.start = low_base;
458 crashk_low_res.end = low_base + low_size - 1;
459 insert_resource(&iomem_resource, &crashk_low_res);
460#endif
461 return 0;
462}
463
464static void __init reserve_crashkernel(void)
465{
466 unsigned long long crash_size, crash_base, total_mem;
467 bool high = false;
468 int ret;
469
470 total_mem = memblock_phys_mem_size();
471
472
473 ret = parse_crashkernel(boot_command_line, total_mem, &crash_size, &crash_base);
474 if (ret != 0 || crash_size <= 0) {
475
476 ret = parse_crashkernel_high(boot_command_line, total_mem,
477 &crash_size, &crash_base);
478 if (ret != 0 || crash_size <= 0)
479 return;
480 high = true;
481 }
482
483 if (xen_pv_domain()) {
484 pr_info("Ignoring crashkernel for a Xen PV domain\n");
485 return;
486 }
487
488
489 if (!crash_base) {
490
491
492
493
494
495
496
497
498 if (!high)
499 crash_base = memblock_phys_alloc_range(crash_size,
500 CRASH_ALIGN, CRASH_ALIGN,
501 CRASH_ADDR_LOW_MAX);
502 if (!crash_base)
503 crash_base = memblock_phys_alloc_range(crash_size,
504 CRASH_ALIGN, CRASH_ALIGN,
505 CRASH_ADDR_HIGH_MAX);
506 if (!crash_base) {
507 pr_info("crashkernel reservation failed - No suitable area found.\n");
508 return;
509 }
510 } else {
511 unsigned long long start;
512
513 start = memblock_phys_alloc_range(crash_size, SZ_1M, crash_base,
514 crash_base + crash_size);
515 if (start != crash_base) {
516 pr_info("crashkernel reservation failed - memory is in use.\n");
517 return;
518 }
519 }
520
521 if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) {
522 memblock_free(crash_base, crash_size);
523 return;
524 }
525
526 pr_info("Reserving %ldMB of memory at %ldMB for crashkernel (System RAM: %ldMB)\n",
527 (unsigned long)(crash_size >> 20),
528 (unsigned long)(crash_base >> 20),
529 (unsigned long)(total_mem >> 20));
530
531 crashk_res.start = crash_base;
532 crashk_res.end = crash_base + crash_size - 1;
533 insert_resource(&iomem_resource, &crashk_res);
534}
535#else
536static void __init reserve_crashkernel(void)
537{
538}
539#endif
540
541static struct resource standard_io_resources[] = {
542 { .name = "dma1", .start = 0x00, .end = 0x1f,
543 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
544 { .name = "pic1", .start = 0x20, .end = 0x21,
545 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
546 { .name = "timer0", .start = 0x40, .end = 0x43,
547 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
548 { .name = "timer1", .start = 0x50, .end = 0x53,
549 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
550 { .name = "keyboard", .start = 0x60, .end = 0x60,
551 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
552 { .name = "keyboard", .start = 0x64, .end = 0x64,
553 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
554 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
555 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
556 { .name = "pic2", .start = 0xa0, .end = 0xa1,
557 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
558 { .name = "dma2", .start = 0xc0, .end = 0xdf,
559 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
560 { .name = "fpu", .start = 0xf0, .end = 0xff,
561 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
562};
563
564void __init reserve_standard_io_resources(void)
565{
566 int i;
567
568
569 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
570 request_resource(&ioport_resource, &standard_io_resources[i]);
571
572}
573
574static __init void reserve_ibft_region(void)
575{
576 unsigned long addr, size = 0;
577
578 addr = find_ibft_region(&size);
579
580 if (size)
581 memblock_reserve(addr, size);
582}
583
584static bool __init snb_gfx_workaround_needed(void)
585{
586#ifdef CONFIG_PCI
587 int i;
588 u16 vendor, devid;
589 static const __initconst u16 snb_ids[] = {
590 0x0102,
591 0x0112,
592 0x0122,
593 0x0106,
594 0x0116,
595 0x0126,
596 0x010a,
597 };
598
599
600 if (!early_pci_allowed())
601 return false;
602
603 vendor = read_pci_config_16(0, 2, 0, PCI_VENDOR_ID);
604 if (vendor != 0x8086)
605 return false;
606
607 devid = read_pci_config_16(0, 2, 0, PCI_DEVICE_ID);
608 for (i = 0; i < ARRAY_SIZE(snb_ids); i++)
609 if (devid == snb_ids[i])
610 return true;
611#endif
612
613 return false;
614}
615
616
617
618
619
620static void __init trim_snb_memory(void)
621{
622 static const __initconst unsigned long bad_pages[] = {
623 0x20050000,
624 0x20110000,
625 0x20130000,
626 0x20138000,
627 0x40004000,
628 };
629 int i;
630
631 if (!snb_gfx_workaround_needed())
632 return;
633
634 printk(KERN_DEBUG "reserving inaccessible SNB gfx pages\n");
635
636
637
638
639
640
641
642
643
644
645
646
647 for (i = 0; i < ARRAY_SIZE(bad_pages); i++) {
648 if (memblock_reserve(bad_pages[i], PAGE_SIZE))
649 printk(KERN_WARNING "failed to reserve 0x%08lx\n",
650 bad_pages[i]);
651 }
652}
653
654static void __init trim_bios_range(void)
655{
656
657
658
659
660
661
662
663
664
665 e820__range_update(0, PAGE_SIZE, E820_TYPE_RAM, E820_TYPE_RESERVED);
666
667
668
669
670
671
672 e820__range_remove(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_TYPE_RAM, 1);
673
674 e820__update_table(e820_table);
675}
676
677
678static void __init e820_add_kernel_range(void)
679{
680 u64 start = __pa_symbol(_text);
681 u64 size = __pa_symbol(_end) - start;
682
683
684
685
686
687
688
689
690 if (e820__mapped_all(start, start + size, E820_TYPE_RAM))
691 return;
692
693 pr_warn(".text .data .bss are not marked as E820_TYPE_RAM!\n");
694 e820__range_remove(start, size, E820_TYPE_RAM, 0);
695 e820__range_add(start, size, E820_TYPE_RAM);
696}
697
698static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10;
699
700static int __init parse_reservelow(char *p)
701{
702 unsigned long long size;
703
704 if (!p)
705 return -EINVAL;
706
707 size = memparse(p, &p);
708
709 if (size < 4096)
710 size = 4096;
711
712 if (size > 640*1024)
713 size = 640*1024;
714
715 reserve_low = size;
716
717 return 0;
718}
719
720early_param("reservelow", parse_reservelow);
721
722static void __init early_reserve_memory(void)
723{
724
725
726
727
728
729
730 memblock_reserve(__pa_symbol(_text),
731 (unsigned long)__end_of_kernel_reserve - (unsigned long)_text);
732
733
734
735
736
737
738
739
740
741
742
743
744 memblock_reserve(0, SZ_64K);
745
746 early_reserve_initrd();
747
748 if (efi_enabled(EFI_BOOT))
749 efi_memblock_x86_reserve_range();
750
751 memblock_x86_reserve_range_setup_data();
752
753 reserve_ibft_region();
754 reserve_bios_regions();
755 trim_snb_memory();
756}
757
758
759
760
761static int
762dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p)
763{
764 if (kaslr_enabled()) {
765 pr_emerg("Kernel Offset: 0x%lx from 0x%lx (relocation range: 0x%lx-0x%lx)\n",
766 kaslr_offset(),
767 __START_KERNEL,
768 __START_KERNEL_map,
769 MODULES_VADDR-1);
770 } else {
771 pr_emerg("Kernel Offset: disabled\n");
772 }
773
774 return 0;
775}
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790void __init setup_arch(char **cmdline_p)
791{
792#ifdef CONFIG_X86_32
793 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
794
795
796
797
798
799 clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY,
800 initial_page_table + KERNEL_PGD_BOUNDARY,
801 KERNEL_PGD_PTRS);
802
803 load_cr3(swapper_pg_dir);
804
805
806
807
808
809
810
811
812
813 __flush_tlb_all();
814#else
815 printk(KERN_INFO "Command line: %s\n", boot_command_line);
816 boot_cpu_data.x86_phys_bits = MAX_PHYSMEM_BITS;
817#endif
818
819
820
821
822
823 olpc_ofw_detect();
824
825 idt_setup_early_traps();
826 early_cpu_init();
827 jump_label_init();
828 static_call_init();
829 early_ioremap_init();
830
831 setup_olpc_ofw_pgd();
832
833 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
834 screen_info = boot_params.screen_info;
835 edid_info = boot_params.edid_info;
836#ifdef CONFIG_X86_32
837 apm_info.bios = boot_params.apm_bios_info;
838 ist_info = boot_params.ist_info;
839#endif
840 saved_video_mode = boot_params.hdr.vid_mode;
841 bootloader_type = boot_params.hdr.type_of_loader;
842 if ((bootloader_type >> 4) == 0xe) {
843 bootloader_type &= 0xf;
844 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
845 }
846 bootloader_version = bootloader_type & 0xf;
847 bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
848
849#ifdef CONFIG_BLK_DEV_RAM
850 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
851#endif
852#ifdef CONFIG_EFI
853 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
854 EFI32_LOADER_SIGNATURE, 4)) {
855 set_bit(EFI_BOOT, &efi.flags);
856 } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
857 EFI64_LOADER_SIGNATURE, 4)) {
858 set_bit(EFI_BOOT, &efi.flags);
859 set_bit(EFI_64BIT, &efi.flags);
860 }
861#endif
862
863 x86_init.oem.arch_setup();
864
865 iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
866 e820__memory_setup();
867 parse_setup_data();
868
869 copy_edd();
870
871 if (!boot_params.hdr.root_flags)
872 root_mountflags &= ~MS_RDONLY;
873 init_mm.start_code = (unsigned long) _text;
874 init_mm.end_code = (unsigned long) _etext;
875 init_mm.end_data = (unsigned long) _edata;
876 init_mm.brk = _brk_end;
877
878 code_resource.start = __pa_symbol(_text);
879 code_resource.end = __pa_symbol(_etext)-1;
880 rodata_resource.start = __pa_symbol(__start_rodata);
881 rodata_resource.end = __pa_symbol(__end_rodata)-1;
882 data_resource.start = __pa_symbol(_sdata);
883 data_resource.end = __pa_symbol(_edata)-1;
884 bss_resource.start = __pa_symbol(__bss_start);
885 bss_resource.end = __pa_symbol(__bss_stop)-1;
886
887#ifdef CONFIG_CMDLINE_BOOL
888#ifdef CONFIG_CMDLINE_OVERRIDE
889 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
890#else
891 if (builtin_cmdline[0]) {
892
893 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
894 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
895 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
896 }
897#endif
898#endif
899
900 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
901 *cmdline_p = command_line;
902
903
904
905
906
907
908
909
910 x86_configure_nx();
911
912 parse_early_param();
913
914
915
916
917
918
919
920
921
922
923
924 early_reserve_memory();
925
926#ifdef CONFIG_MEMORY_HOTPLUG
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946 if (movable_node_is_enabled())
947 memblock_set_bottom_up(true);
948#endif
949
950 x86_report_nx();
951
952 if (acpi_mps_check()) {
953#ifdef CONFIG_X86_LOCAL_APIC
954 disable_apic = 1;
955#endif
956 setup_clear_cpu_cap(X86_FEATURE_APIC);
957 }
958
959 e820__reserve_setup_data();
960 e820__finish_early_params();
961
962 if (efi_enabled(EFI_BOOT))
963 efi_init();
964
965 dmi_setup();
966
967
968
969
970
971 init_hypervisor_platform();
972
973 tsc_early_init();
974 x86_init.resources.probe_roms();
975
976
977 insert_resource(&iomem_resource, &code_resource);
978 insert_resource(&iomem_resource, &rodata_resource);
979 insert_resource(&iomem_resource, &data_resource);
980 insert_resource(&iomem_resource, &bss_resource);
981
982 e820_add_kernel_range();
983 trim_bios_range();
984#ifdef CONFIG_X86_32
985 if (ppro_with_ram_bug()) {
986 e820__range_update(0x70000000ULL, 0x40000ULL, E820_TYPE_RAM,
987 E820_TYPE_RESERVED);
988 e820__update_table(e820_table);
989 printk(KERN_INFO "fixed physical RAM map:\n");
990 e820__print_table("bad_ppro");
991 }
992#else
993 early_gart_iommu_check();
994#endif
995
996
997
998
999
1000 max_pfn = e820__end_of_ram_pfn();
1001
1002
1003 mtrr_bp_init();
1004 if (mtrr_trim_uncached_memory(max_pfn))
1005 max_pfn = e820__end_of_ram_pfn();
1006
1007 max_possible_pfn = max_pfn;
1008
1009
1010
1011
1012
1013
1014 init_cache_modes();
1015
1016
1017
1018
1019
1020 kernel_randomize_memory();
1021
1022#ifdef CONFIG_X86_32
1023
1024 find_low_pfn_range();
1025#else
1026 check_x2apic();
1027
1028
1029
1030 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
1031 max_low_pfn = e820__end_of_low_ram_pfn();
1032 else
1033 max_low_pfn = max_pfn;
1034
1035 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
1036#endif
1037
1038
1039
1040
1041 find_smp_config();
1042
1043 early_alloc_pgt_buf();
1044
1045
1046
1047
1048
1049
1050 reserve_brk();
1051
1052 cleanup_highmap();
1053
1054 memblock_set_current_limit(ISA_END_ADDRESS);
1055 e820__memblock_setup();
1056
1057
1058
1059
1060
1061 sev_setup_arch();
1062
1063 efi_fake_memmap();
1064 efi_find_mirror();
1065 efi_esrt_init();
1066 efi_mokvar_table_init();
1067
1068
1069
1070
1071
1072 efi_reserve_boot_services();
1073
1074
1075 e820__memblock_alloc_reserved_mpc_new();
1076
1077#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
1078 setup_bios_corruption_check();
1079#endif
1080
1081#ifdef CONFIG_X86_32
1082 printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n",
1083 (max_pfn_mapped<<PAGE_SHIFT) - 1);
1084#endif
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099 reserve_real_mode();
1100
1101 init_mem_mapping();
1102
1103 idt_setup_early_pf();
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114 mmu_cr4_features = __read_cr4() & ~X86_CR4_PCIDE;
1115
1116 memblock_set_current_limit(get_max_mapped());
1117
1118
1119
1120
1121
1122#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
1123 if (init_ohci1394_dma_early)
1124 init_ohci1394_dma_on_all_controllers();
1125#endif
1126
1127 setup_log_buf(1);
1128
1129 if (efi_enabled(EFI_BOOT)) {
1130 switch (boot_params.secure_boot) {
1131 case efi_secureboot_mode_disabled:
1132 pr_info("Secure boot disabled\n");
1133 break;
1134 case efi_secureboot_mode_enabled:
1135 pr_info("Secure boot enabled\n");
1136 break;
1137 default:
1138 pr_info("Secure boot could not be determined\n");
1139 break;
1140 }
1141 }
1142
1143 reserve_initrd();
1144
1145 acpi_table_upgrade();
1146
1147 acpi_boot_table_init();
1148
1149 vsmp_init();
1150
1151 io_delay_init();
1152
1153 early_platform_quirks();
1154
1155 early_acpi_boot_init();
1156
1157 initmem_init();
1158 dma_contiguous_reserve(max_pfn_mapped << PAGE_SHIFT);
1159
1160 if (boot_cpu_has(X86_FEATURE_GBPAGES))
1161 hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);
1162
1163
1164
1165
1166
1167 reserve_crashkernel();
1168
1169 memblock_find_dma_reserve();
1170
1171 if (!early_xdbc_setup_hardware())
1172 early_xdbc_register_console();
1173
1174 x86_init.paging.pagetable_init();
1175
1176 kasan_init();
1177
1178
1179
1180
1181
1182
1183
1184 sync_initial_page_table();
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 x86_dtb_init();
1199
1200
1201
1202
1203 get_smp_config();
1204
1205
1206
1207
1208
1209 init_apic_mappings();
1210
1211 prefill_possible_map();
1212
1213 init_cpu_to_node();
1214 init_gi_nodes();
1215
1216 io_apic_init_mappings();
1217
1218 x86_init.hyper.guest_late_init();
1219
1220 e820__reserve_resources();
1221 e820__register_nosave_regions(max_pfn);
1222
1223 x86_init.resources.reserve_resources();
1224
1225 e820__setup_pci_gap();
1226
1227#ifdef CONFIG_VT
1228#if defined(CONFIG_VGA_CONSOLE)
1229 if (!efi_enabled(EFI_BOOT) || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1230 conswitchp = &vga_con;
1231#endif
1232#endif
1233 x86_init.oem.banner();
1234
1235 x86_init.timers.wallclock_init();
1236
1237
1238
1239
1240
1241
1242
1243 therm_lvt_init();
1244
1245 mcheck_init();
1246
1247 register_refined_jiffies(CLOCK_TICK_RATE);
1248
1249#ifdef CONFIG_EFI
1250 if (efi_enabled(EFI_BOOT))
1251 efi_apply_memmap_quirks();
1252#endif
1253
1254 unwind_init();
1255}
1256
1257#ifdef CONFIG_X86_32
1258
1259static struct resource video_ram_resource = {
1260 .name = "Video RAM area",
1261 .start = 0xa0000,
1262 .end = 0xbffff,
1263 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
1264};
1265
1266void __init i386_reserve_resources(void)
1267{
1268 request_resource(&iomem_resource, &video_ram_resource);
1269 reserve_standard_io_resources();
1270}
1271
1272#endif
1273
1274static struct notifier_block kernel_offset_notifier = {
1275 .notifier_call = dump_kernel_offset
1276};
1277
1278static int __init register_kernel_offset_dumper(void)
1279{
1280 atomic_notifier_chain_register(&panic_notifier_list,
1281 &kernel_offset_notifier);
1282 return 0;
1283}
1284__initcall(register_kernel_offset_dumper);
1285