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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/panic_notifier.h>
18#include <linux/pci.h>
19#include <linux/root_dev.h>
20#include <linux/hugetlb.h>
21#include <linux/tboot.h>
22#include <linux/usb/xhci-dbgp.h>
23#include <linux/static_call.h>
24#include <linux/swiotlb.h>
25
26#include <uapi/linux/mount.h>
27
28#include <xen/xen.h>
29
30#include <asm/apic.h>
31#include <asm/numa.h>
32#include <asm/bios_ebda.h>
33#include <asm/bugs.h>
34#include <asm/cpu.h>
35#include <asm/efi.h>
36#include <asm/gart.h>
37#include <asm/hypervisor.h>
38#include <asm/io_apic.h>
39#include <asm/kasan.h>
40#include <asm/kaslr.h>
41#include <asm/mce.h>
42#include <asm/mtrr.h>
43#include <asm/realmode.h>
44#include <asm/olpc_ofw.h>
45#include <asm/pci-direct.h>
46#include <asm/prom.h>
47#include <asm/proto.h>
48#include <asm/thermal.h>
49#include <asm/unwind.h>
50#include <asm/vsyscall.h>
51#include <linux/vmalloc.h>
52
53
54
55
56
57
58
59
60unsigned long max_low_pfn_mapped;
61unsigned long max_pfn_mapped;
62
63#ifdef CONFIG_DMI
64RESERVE_BRK(dmi_alloc, 65536);
65#endif
66
67
68
69
70
71
72
73unsigned long _brk_start = (unsigned long)__brk_base;
74unsigned long _brk_end = (unsigned long)__brk_base;
75
76struct boot_params boot_params;
77
78
79
80
81
82
83
84static struct resource rodata_resource = {
85 .name = "Kernel rodata",
86 .start = 0,
87 .end = 0,
88 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
89};
90
91static struct resource data_resource = {
92 .name = "Kernel data",
93 .start = 0,
94 .end = 0,
95 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
96};
97
98static struct resource code_resource = {
99 .name = "Kernel code",
100 .start = 0,
101 .end = 0,
102 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
103};
104
105static struct resource bss_resource = {
106 .name = "Kernel bss",
107 .start = 0,
108 .end = 0,
109 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM
110};
111
112
113#ifdef CONFIG_X86_32
114
115struct cpuinfo_x86 new_cpu_data;
116
117
118struct cpuinfo_x86 boot_cpu_data __read_mostly;
119EXPORT_SYMBOL(boot_cpu_data);
120
121unsigned int def_to_bigsmp;
122
123struct apm_info apm_info;
124EXPORT_SYMBOL(apm_info);
125
126#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
127 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
128struct ist_info ist_info;
129EXPORT_SYMBOL(ist_info);
130#else
131struct ist_info ist_info;
132#endif
133
134#else
135struct cpuinfo_x86 boot_cpu_data __read_mostly;
136EXPORT_SYMBOL(boot_cpu_data);
137#endif
138
139
140#if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
141__visible unsigned long mmu_cr4_features __ro_after_init;
142#else
143__visible unsigned long mmu_cr4_features __ro_after_init = X86_CR4_PAE;
144#endif
145
146
147int bootloader_type, bootloader_version;
148
149
150
151
152struct screen_info screen_info;
153EXPORT_SYMBOL(screen_info);
154struct edid_info edid_info;
155EXPORT_SYMBOL_GPL(edid_info);
156
157extern int root_mountflags;
158
159unsigned long saved_video_mode;
160
161#define RAMDISK_IMAGE_START_MASK 0x07FF
162#define RAMDISK_PROMPT_FLAG 0x8000
163#define RAMDISK_LOAD_FLAG 0x4000
164
165static char __initdata command_line[COMMAND_LINE_SIZE];
166#ifdef CONFIG_CMDLINE_BOOL
167static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
168#endif
169
170#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
171struct edd edd;
172#ifdef CONFIG_EDD_MODULE
173EXPORT_SYMBOL(edd);
174#endif
175
176
177
178
179
180static inline void __init copy_edd(void)
181{
182 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
183 sizeof(edd.mbr_signature));
184 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
185 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
186 edd.edd_info_nr = boot_params.eddbuf_entries;
187}
188#else
189static inline void __init copy_edd(void)
190{
191}
192#endif
193
194void * __init extend_brk(size_t size, size_t align)
195{
196 size_t mask = align - 1;
197 void *ret;
198
199 BUG_ON(_brk_start == 0);
200 BUG_ON(align & mask);
201
202 _brk_end = (_brk_end + mask) & ~mask;
203 BUG_ON((char *)(_brk_end + size) > __brk_limit);
204
205 ret = (void *)_brk_end;
206 _brk_end += size;
207
208 memset(ret, 0, size);
209
210 return ret;
211}
212
213#ifdef CONFIG_X86_32
214static void __init cleanup_highmap(void)
215{
216}
217#endif
218
219static void __init reserve_brk(void)
220{
221 if (_brk_end > _brk_start)
222 memblock_reserve(__pa_symbol(_brk_start),
223 _brk_end - _brk_start);
224
225
226
227 _brk_start = 0;
228}
229
230u64 relocated_ramdisk;
231
232#ifdef CONFIG_BLK_DEV_INITRD
233
234static u64 __init get_ramdisk_image(void)
235{
236 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
237
238 ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32;
239
240 if (ramdisk_image == 0)
241 ramdisk_image = phys_initrd_start;
242
243 return ramdisk_image;
244}
245static u64 __init get_ramdisk_size(void)
246{
247 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
248
249 ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32;
250
251 if (ramdisk_size == 0)
252 ramdisk_size = phys_initrd_size;
253
254 return ramdisk_size;
255}
256
257static void __init relocate_initrd(void)
258{
259
260 u64 ramdisk_image = get_ramdisk_image();
261 u64 ramdisk_size = get_ramdisk_size();
262 u64 area_size = PAGE_ALIGN(ramdisk_size);
263
264
265 relocated_ramdisk = memblock_phys_alloc_range(area_size, PAGE_SIZE, 0,
266 PFN_PHYS(max_pfn_mapped));
267 if (!relocated_ramdisk)
268 panic("Cannot find place for new RAMDISK of size %lld\n",
269 ramdisk_size);
270
271 initrd_start = relocated_ramdisk + PAGE_OFFSET;
272 initrd_end = initrd_start + ramdisk_size;
273 printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n",
274 relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);
275
276 copy_from_early_mem((void *)initrd_start, ramdisk_image, ramdisk_size);
277
278 printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to"
279 " [mem %#010llx-%#010llx]\n",
280 ramdisk_image, ramdisk_image + ramdisk_size - 1,
281 relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1);
282}
283
284static void __init early_reserve_initrd(void)
285{
286
287 u64 ramdisk_image = get_ramdisk_image();
288 u64 ramdisk_size = get_ramdisk_size();
289 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
290
291 if (!boot_params.hdr.type_of_loader ||
292 !ramdisk_image || !ramdisk_size)
293 return;
294
295 memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image);
296}
297
298static void __init reserve_initrd(void)
299{
300
301 u64 ramdisk_image = get_ramdisk_image();
302 u64 ramdisk_size = get_ramdisk_size();
303 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
304
305 if (!boot_params.hdr.type_of_loader ||
306 !ramdisk_image || !ramdisk_size)
307 return;
308
309 initrd_start = 0;
310
311 printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image,
312 ramdisk_end - 1);
313
314 if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image),
315 PFN_DOWN(ramdisk_end))) {
316
317 initrd_start = ramdisk_image + PAGE_OFFSET;
318 initrd_end = initrd_start + ramdisk_size;
319 return;
320 }
321
322 relocate_initrd();
323
324 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image);
325}
326
327#else
328static void __init early_reserve_initrd(void)
329{
330}
331static void __init reserve_initrd(void)
332{
333}
334#endif
335
336static void __init parse_setup_data(void)
337{
338 struct setup_data *data;
339 u64 pa_data, pa_next;
340
341 pa_data = boot_params.hdr.setup_data;
342 while (pa_data) {
343 u32 data_len, data_type;
344
345 data = early_memremap(pa_data, sizeof(*data));
346 data_len = data->len + sizeof(struct setup_data);
347 data_type = data->type;
348 pa_next = data->next;
349 early_memunmap(data, sizeof(*data));
350
351 switch (data_type) {
352 case SETUP_E820_EXT:
353 e820__memory_setup_extended(pa_data, data_len);
354 break;
355 case SETUP_DTB:
356 add_dtb(pa_data);
357 break;
358 case SETUP_EFI:
359 parse_efi_setup(pa_data, data_len);
360 break;
361 default:
362 break;
363 }
364 pa_data = pa_next;
365 }
366}
367
368static void __init memblock_x86_reserve_range_setup_data(void)
369{
370 struct setup_data *data;
371 u64 pa_data;
372
373 pa_data = boot_params.hdr.setup_data;
374 while (pa_data) {
375 data = early_memremap(pa_data, sizeof(*data));
376 memblock_reserve(pa_data, sizeof(*data) + data->len);
377
378 if (data->type == SETUP_INDIRECT &&
379 ((struct setup_indirect *)data->data)->type != SETUP_INDIRECT)
380 memblock_reserve(((struct setup_indirect *)data->data)->addr,
381 ((struct setup_indirect *)data->data)->len);
382
383 pa_data = data->next;
384 early_memunmap(data, sizeof(*data));
385 }
386}
387
388
389
390
391
392#ifdef CONFIG_KEXEC_CORE
393
394
395#define CRASH_ALIGN SZ_16M
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410#ifdef CONFIG_X86_32
411# define CRASH_ADDR_LOW_MAX SZ_512M
412# define CRASH_ADDR_HIGH_MAX SZ_512M
413#else
414# define CRASH_ADDR_LOW_MAX SZ_4G
415# define CRASH_ADDR_HIGH_MAX SZ_64T
416#endif
417
418static int __init reserve_crashkernel_low(void)
419{
420#ifdef CONFIG_X86_64
421 unsigned long long base, low_base = 0, low_size = 0;
422 unsigned long low_mem_limit;
423 int ret;
424
425 low_mem_limit = min(memblock_phys_mem_size(), CRASH_ADDR_LOW_MAX);
426
427
428 ret = parse_crashkernel_low(boot_command_line, low_mem_limit, &low_size, &base);
429 if (ret) {
430
431
432
433
434
435
436
437
438
439 low_size = max(swiotlb_size_or_default() + (8UL << 20), 256UL << 20);
440 } else {
441
442 if (!low_size)
443 return 0;
444 }
445
446 low_base = memblock_phys_alloc_range(low_size, CRASH_ALIGN, 0, CRASH_ADDR_LOW_MAX);
447 if (!low_base) {
448 pr_err("Cannot reserve %ldMB crashkernel low memory, please try smaller size.\n",
449 (unsigned long)(low_size >> 20));
450 return -ENOMEM;
451 }
452
453 pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (low RAM limit: %ldMB)\n",
454 (unsigned long)(low_size >> 20),
455 (unsigned long)(low_base >> 20),
456 (unsigned long)(low_mem_limit >> 20));
457
458 crashk_low_res.start = low_base;
459 crashk_low_res.end = low_base + low_size - 1;
460 insert_resource(&iomem_resource, &crashk_low_res);
461#endif
462 return 0;
463}
464
465static void __init reserve_crashkernel(void)
466{
467 unsigned long long crash_size, crash_base, total_mem;
468 bool high = false;
469 int ret;
470
471 total_mem = memblock_phys_mem_size();
472
473
474 ret = parse_crashkernel(boot_command_line, total_mem, &crash_size, &crash_base);
475 if (ret != 0 || crash_size <= 0) {
476
477 ret = parse_crashkernel_high(boot_command_line, total_mem,
478 &crash_size, &crash_base);
479 if (ret != 0 || crash_size <= 0)
480 return;
481 high = true;
482 }
483
484 if (xen_pv_domain()) {
485 pr_info("Ignoring crashkernel for a Xen PV domain\n");
486 return;
487 }
488
489
490 if (!crash_base) {
491
492
493
494
495
496
497
498
499 if (!high)
500 crash_base = memblock_phys_alloc_range(crash_size,
501 CRASH_ALIGN, CRASH_ALIGN,
502 CRASH_ADDR_LOW_MAX);
503 if (!crash_base)
504 crash_base = memblock_phys_alloc_range(crash_size,
505 CRASH_ALIGN, CRASH_ALIGN,
506 CRASH_ADDR_HIGH_MAX);
507 if (!crash_base) {
508 pr_info("crashkernel reservation failed - No suitable area found.\n");
509 return;
510 }
511 } else {
512 unsigned long long start;
513
514 start = memblock_phys_alloc_range(crash_size, SZ_1M, crash_base,
515 crash_base + crash_size);
516 if (start != crash_base) {
517 pr_info("crashkernel reservation failed - memory is in use.\n");
518 return;
519 }
520 }
521
522 if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) {
523 memblock_free(crash_base, crash_size);
524 return;
525 }
526
527 pr_info("Reserving %ldMB of memory at %ldMB for crashkernel (System RAM: %ldMB)\n",
528 (unsigned long)(crash_size >> 20),
529 (unsigned long)(crash_base >> 20),
530 (unsigned long)(total_mem >> 20));
531
532 crashk_res.start = crash_base;
533 crashk_res.end = crash_base + crash_size - 1;
534 insert_resource(&iomem_resource, &crashk_res);
535}
536#else
537static void __init reserve_crashkernel(void)
538{
539}
540#endif
541
542static struct resource standard_io_resources[] = {
543 { .name = "dma1", .start = 0x00, .end = 0x1f,
544 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
545 { .name = "pic1", .start = 0x20, .end = 0x21,
546 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
547 { .name = "timer0", .start = 0x40, .end = 0x43,
548 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
549 { .name = "timer1", .start = 0x50, .end = 0x53,
550 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
551 { .name = "keyboard", .start = 0x60, .end = 0x60,
552 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
553 { .name = "keyboard", .start = 0x64, .end = 0x64,
554 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
555 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
556 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
557 { .name = "pic2", .start = 0xa0, .end = 0xa1,
558 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
559 { .name = "dma2", .start = 0xc0, .end = 0xdf,
560 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
561 { .name = "fpu", .start = 0xf0, .end = 0xff,
562 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
563};
564
565void __init reserve_standard_io_resources(void)
566{
567 int i;
568
569
570 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
571 request_resource(&ioport_resource, &standard_io_resources[i]);
572
573}
574
575static __init void reserve_ibft_region(void)
576{
577 unsigned long addr, size = 0;
578
579 addr = find_ibft_region(&size);
580
581 if (size)
582 memblock_reserve(addr, size);
583}
584
585static bool __init snb_gfx_workaround_needed(void)
586{
587#ifdef CONFIG_PCI
588 int i;
589 u16 vendor, devid;
590 static const __initconst u16 snb_ids[] = {
591 0x0102,
592 0x0112,
593 0x0122,
594 0x0106,
595 0x0116,
596 0x0126,
597 0x010a,
598 };
599
600
601 if (!early_pci_allowed())
602 return false;
603
604 vendor = read_pci_config_16(0, 2, 0, PCI_VENDOR_ID);
605 if (vendor != 0x8086)
606 return false;
607
608 devid = read_pci_config_16(0, 2, 0, PCI_DEVICE_ID);
609 for (i = 0; i < ARRAY_SIZE(snb_ids); i++)
610 if (devid == snb_ids[i])
611 return true;
612#endif
613
614 return false;
615}
616
617
618
619
620
621static void __init trim_snb_memory(void)
622{
623 static const __initconst unsigned long bad_pages[] = {
624 0x20050000,
625 0x20110000,
626 0x20130000,
627 0x20138000,
628 0x40004000,
629 };
630 int i;
631
632 if (!snb_gfx_workaround_needed())
633 return;
634
635 printk(KERN_DEBUG "reserving inaccessible SNB gfx pages\n");
636
637
638
639
640
641
642
643
644
645
646
647
648 for (i = 0; i < ARRAY_SIZE(bad_pages); i++) {
649 if (memblock_reserve(bad_pages[i], PAGE_SIZE))
650 printk(KERN_WARNING "failed to reserve 0x%08lx\n",
651 bad_pages[i]);
652 }
653}
654
655static void __init trim_bios_range(void)
656{
657
658
659
660
661
662
663
664
665
666 e820__range_update(0, PAGE_SIZE, E820_TYPE_RAM, E820_TYPE_RESERVED);
667
668
669
670
671
672
673 e820__range_remove(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_TYPE_RAM, 1);
674
675 e820__update_table(e820_table);
676}
677
678
679static void __init e820_add_kernel_range(void)
680{
681 u64 start = __pa_symbol(_text);
682 u64 size = __pa_symbol(_end) - start;
683
684
685
686
687
688
689
690
691 if (e820__mapped_all(start, start + size, E820_TYPE_RAM))
692 return;
693
694 pr_warn(".text .data .bss are not marked as E820_TYPE_RAM!\n");
695 e820__range_remove(start, size, E820_TYPE_RAM, 0);
696 e820__range_add(start, size, E820_TYPE_RAM);
697}
698
699static void __init early_reserve_memory(void)
700{
701
702
703
704
705
706
707 memblock_reserve(__pa_symbol(_text),
708 (unsigned long)__end_of_kernel_reserve - (unsigned long)_text);
709
710
711
712
713
714
715
716
717
718
719
720
721 memblock_reserve(0, SZ_64K);
722
723 early_reserve_initrd();
724
725 if (efi_enabled(EFI_BOOT))
726 efi_memblock_x86_reserve_range();
727
728 memblock_x86_reserve_range_setup_data();
729
730 reserve_ibft_region();
731 reserve_bios_regions();
732 trim_snb_memory();
733}
734
735
736
737
738static int
739dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p)
740{
741 if (kaslr_enabled()) {
742 pr_emerg("Kernel Offset: 0x%lx from 0x%lx (relocation range: 0x%lx-0x%lx)\n",
743 kaslr_offset(),
744 __START_KERNEL,
745 __START_KERNEL_map,
746 MODULES_VADDR-1);
747 } else {
748 pr_emerg("Kernel Offset: disabled\n");
749 }
750
751 return 0;
752}
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767void __init setup_arch(char **cmdline_p)
768{
769#ifdef CONFIG_X86_32
770 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
771
772
773
774
775
776 clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY,
777 initial_page_table + KERNEL_PGD_BOUNDARY,
778 KERNEL_PGD_PTRS);
779
780 load_cr3(swapper_pg_dir);
781
782
783
784
785
786
787
788
789
790 __flush_tlb_all();
791#else
792 printk(KERN_INFO "Command line: %s\n", boot_command_line);
793 boot_cpu_data.x86_phys_bits = MAX_PHYSMEM_BITS;
794#endif
795
796
797
798
799
800 olpc_ofw_detect();
801
802 idt_setup_early_traps();
803 early_cpu_init();
804 jump_label_init();
805 static_call_init();
806 early_ioremap_init();
807
808 setup_olpc_ofw_pgd();
809
810 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
811 screen_info = boot_params.screen_info;
812 edid_info = boot_params.edid_info;
813#ifdef CONFIG_X86_32
814 apm_info.bios = boot_params.apm_bios_info;
815 ist_info = boot_params.ist_info;
816#endif
817 saved_video_mode = boot_params.hdr.vid_mode;
818 bootloader_type = boot_params.hdr.type_of_loader;
819 if ((bootloader_type >> 4) == 0xe) {
820 bootloader_type &= 0xf;
821 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
822 }
823 bootloader_version = bootloader_type & 0xf;
824 bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
825
826#ifdef CONFIG_BLK_DEV_RAM
827 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
828#endif
829#ifdef CONFIG_EFI
830 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
831 EFI32_LOADER_SIGNATURE, 4)) {
832 set_bit(EFI_BOOT, &efi.flags);
833 } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
834 EFI64_LOADER_SIGNATURE, 4)) {
835 set_bit(EFI_BOOT, &efi.flags);
836 set_bit(EFI_64BIT, &efi.flags);
837 }
838#endif
839
840 x86_init.oem.arch_setup();
841
842 iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
843 e820__memory_setup();
844 parse_setup_data();
845
846 copy_edd();
847
848 if (!boot_params.hdr.root_flags)
849 root_mountflags &= ~MS_RDONLY;
850 setup_initial_init_mm(_text, _etext, _edata, (void *)_brk_end);
851
852 code_resource.start = __pa_symbol(_text);
853 code_resource.end = __pa_symbol(_etext)-1;
854 rodata_resource.start = __pa_symbol(__start_rodata);
855 rodata_resource.end = __pa_symbol(__end_rodata)-1;
856 data_resource.start = __pa_symbol(_sdata);
857 data_resource.end = __pa_symbol(_edata)-1;
858 bss_resource.start = __pa_symbol(__bss_start);
859 bss_resource.end = __pa_symbol(__bss_stop)-1;
860
861#ifdef CONFIG_CMDLINE_BOOL
862#ifdef CONFIG_CMDLINE_OVERRIDE
863 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
864#else
865 if (builtin_cmdline[0]) {
866
867 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
868 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
869 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
870 }
871#endif
872#endif
873
874 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
875 *cmdline_p = command_line;
876
877
878
879
880
881
882
883
884 x86_configure_nx();
885
886 parse_early_param();
887
888
889
890
891
892
893
894
895
896
897
898 early_reserve_memory();
899
900#ifdef CONFIG_MEMORY_HOTPLUG
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920 if (movable_node_is_enabled())
921 memblock_set_bottom_up(true);
922#endif
923
924 x86_report_nx();
925
926 if (acpi_mps_check()) {
927#ifdef CONFIG_X86_LOCAL_APIC
928 disable_apic = 1;
929#endif
930 setup_clear_cpu_cap(X86_FEATURE_APIC);
931 }
932
933 e820__reserve_setup_data();
934 e820__finish_early_params();
935
936 if (efi_enabled(EFI_BOOT))
937 efi_init();
938
939 dmi_setup();
940
941
942
943
944
945 init_hypervisor_platform();
946
947 tsc_early_init();
948 x86_init.resources.probe_roms();
949
950
951 insert_resource(&iomem_resource, &code_resource);
952 insert_resource(&iomem_resource, &rodata_resource);
953 insert_resource(&iomem_resource, &data_resource);
954 insert_resource(&iomem_resource, &bss_resource);
955
956 e820_add_kernel_range();
957 trim_bios_range();
958#ifdef CONFIG_X86_32
959 if (ppro_with_ram_bug()) {
960 e820__range_update(0x70000000ULL, 0x40000ULL, E820_TYPE_RAM,
961 E820_TYPE_RESERVED);
962 e820__update_table(e820_table);
963 printk(KERN_INFO "fixed physical RAM map:\n");
964 e820__print_table("bad_ppro");
965 }
966#else
967 early_gart_iommu_check();
968#endif
969
970
971
972
973
974 max_pfn = e820__end_of_ram_pfn();
975
976
977 mtrr_bp_init();
978 if (mtrr_trim_uncached_memory(max_pfn))
979 max_pfn = e820__end_of_ram_pfn();
980
981 max_possible_pfn = max_pfn;
982
983
984
985
986
987
988 init_cache_modes();
989
990
991
992
993
994 kernel_randomize_memory();
995
996#ifdef CONFIG_X86_32
997
998 find_low_pfn_range();
999#else
1000 check_x2apic();
1001
1002
1003
1004 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
1005 max_low_pfn = e820__end_of_low_ram_pfn();
1006 else
1007 max_low_pfn = max_pfn;
1008
1009 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
1010#endif
1011
1012
1013
1014
1015 find_smp_config();
1016
1017 early_alloc_pgt_buf();
1018
1019
1020
1021
1022
1023
1024 reserve_brk();
1025
1026 cleanup_highmap();
1027
1028 memblock_set_current_limit(ISA_END_ADDRESS);
1029 e820__memblock_setup();
1030
1031
1032
1033
1034
1035 sev_setup_arch();
1036
1037 efi_fake_memmap();
1038 efi_find_mirror();
1039 efi_esrt_init();
1040 efi_mokvar_table_init();
1041
1042
1043
1044
1045
1046 efi_reserve_boot_services();
1047
1048
1049 e820__memblock_alloc_reserved_mpc_new();
1050
1051#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
1052 setup_bios_corruption_check();
1053#endif
1054
1055#ifdef CONFIG_X86_32
1056 printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n",
1057 (max_pfn_mapped<<PAGE_SHIFT) - 1);
1058#endif
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074 reserve_real_mode();
1075
1076 init_mem_mapping();
1077
1078 idt_setup_early_pf();
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089 mmu_cr4_features = __read_cr4() & ~X86_CR4_PCIDE;
1090
1091 memblock_set_current_limit(get_max_mapped());
1092
1093
1094
1095
1096
1097#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
1098 if (init_ohci1394_dma_early)
1099 init_ohci1394_dma_on_all_controllers();
1100#endif
1101
1102 setup_log_buf(1);
1103
1104 if (efi_enabled(EFI_BOOT)) {
1105 switch (boot_params.secure_boot) {
1106 case efi_secureboot_mode_disabled:
1107 pr_info("Secure boot disabled\n");
1108 break;
1109 case efi_secureboot_mode_enabled:
1110 pr_info("Secure boot enabled\n");
1111 break;
1112 default:
1113 pr_info("Secure boot could not be determined\n");
1114 break;
1115 }
1116 }
1117
1118 reserve_initrd();
1119
1120 acpi_table_upgrade();
1121
1122 acpi_boot_table_init();
1123
1124 vsmp_init();
1125
1126 io_delay_init();
1127
1128 early_platform_quirks();
1129
1130 early_acpi_boot_init();
1131
1132 initmem_init();
1133 dma_contiguous_reserve(max_pfn_mapped << PAGE_SHIFT);
1134
1135 if (boot_cpu_has(X86_FEATURE_GBPAGES))
1136 hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);
1137
1138
1139
1140
1141
1142 reserve_crashkernel();
1143
1144 memblock_find_dma_reserve();
1145
1146 if (!early_xdbc_setup_hardware())
1147 early_xdbc_register_console();
1148
1149 x86_init.paging.pagetable_init();
1150
1151 kasan_init();
1152
1153
1154
1155
1156
1157
1158
1159 sync_initial_page_table();
1160
1161 tboot_probe();
1162
1163 map_vsyscall();
1164
1165 generic_apic_probe();
1166
1167 early_quirks();
1168
1169
1170
1171
1172 acpi_boot_init();
1173 x86_dtb_init();
1174
1175
1176
1177
1178 get_smp_config();
1179
1180
1181
1182
1183
1184 init_apic_mappings();
1185
1186 prefill_possible_map();
1187
1188 init_cpu_to_node();
1189 init_gi_nodes();
1190
1191 io_apic_init_mappings();
1192
1193 x86_init.hyper.guest_late_init();
1194
1195 e820__reserve_resources();
1196 e820__register_nosave_regions(max_pfn);
1197
1198 x86_init.resources.reserve_resources();
1199
1200 e820__setup_pci_gap();
1201
1202#ifdef CONFIG_VT
1203#if defined(CONFIG_VGA_CONSOLE)
1204 if (!efi_enabled(EFI_BOOT) || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1205 conswitchp = &vga_con;
1206#endif
1207#endif
1208 x86_init.oem.banner();
1209
1210 x86_init.timers.wallclock_init();
1211
1212
1213
1214
1215
1216
1217
1218 therm_lvt_init();
1219
1220 mcheck_init();
1221
1222 register_refined_jiffies(CLOCK_TICK_RATE);
1223
1224#ifdef CONFIG_EFI
1225 if (efi_enabled(EFI_BOOT))
1226 efi_apply_memmap_quirks();
1227#endif
1228
1229 unwind_init();
1230}
1231
1232#ifdef CONFIG_X86_32
1233
1234static struct resource video_ram_resource = {
1235 .name = "Video RAM area",
1236 .start = 0xa0000,
1237 .end = 0xbffff,
1238 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
1239};
1240
1241void __init i386_reserve_resources(void)
1242{
1243 request_resource(&iomem_resource, &video_ram_resource);
1244 reserve_standard_io_resources();
1245}
1246
1247#endif
1248
1249static struct notifier_block kernel_offset_notifier = {
1250 .notifier_call = dump_kernel_offset
1251};
1252
1253static int __init register_kernel_offset_dumper(void)
1254{
1255 atomic_notifier_chain_register(&panic_notifier_list,
1256 &kernel_offset_notifier);
1257 return 0;
1258}
1259__initcall(register_kernel_offset_dumper);
1260