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x86: clean up memory corruption check and add more kernel parameters
[deliverable/linux.git] / arch / x86 / kernel / setup.c
1 /*
2 * Copyright (C) 1995 Linus Torvalds
3 *
4 * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
5 *
6 * Memory region support
7 * David Parsons <orc@pell.chi.il.us>, July-August 1999
8 *
9 * Added E820 sanitization routine (removes overlapping memory regions);
10 * Brian Moyle <bmoyle@mvista.com>, February 2001
11 *
12 * Moved CPU detection code to cpu/${cpu}.c
13 * Patrick Mochel <mochel@osdl.org>, March 2002
14 *
15 * Provisions for empty E820 memory regions (reported by certain BIOSes).
16 * Alex Achenbach <xela@slit.de>, December 2002.
17 *
18 */
19
20 /*
21 * This file handles the architecture-dependent parts of initialization
22 */
23
24 #include <linux/sched.h>
25 #include <linux/mm.h>
26 #include <linux/mmzone.h>
27 #include <linux/screen_info.h>
28 #include <linux/ioport.h>
29 #include <linux/acpi.h>
30 #include <linux/apm_bios.h>
31 #include <linux/initrd.h>
32 #include <linux/bootmem.h>
33 #include <linux/seq_file.h>
34 #include <linux/console.h>
35 #include <linux/mca.h>
36 #include <linux/root_dev.h>
37 #include <linux/highmem.h>
38 #include <linux/module.h>
39 #include <linux/efi.h>
40 #include <linux/init.h>
41 #include <linux/edd.h>
42 #include <linux/iscsi_ibft.h>
43 #include <linux/nodemask.h>
44 #include <linux/kexec.h>
45 #include <linux/dmi.h>
46 #include <linux/pfn.h>
47 #include <linux/pci.h>
48 #include <asm/pci-direct.h>
49 #include <linux/init_ohci1394_dma.h>
50 #include <linux/kvm_para.h>
51
52 #include <linux/errno.h>
53 #include <linux/kernel.h>
54 #include <linux/stddef.h>
55 #include <linux/unistd.h>
56 #include <linux/ptrace.h>
57 #include <linux/slab.h>
58 #include <linux/user.h>
59 #include <linux/delay.h>
60
61 #include <linux/kallsyms.h>
62 #include <linux/cpufreq.h>
63 #include <linux/dma-mapping.h>
64 #include <linux/ctype.h>
65 #include <linux/uaccess.h>
66
67 #include <linux/percpu.h>
68 #include <linux/crash_dump.h>
69
70 #include <video/edid.h>
71
72 #include <asm/mtrr.h>
73 #include <asm/apic.h>
74 #include <asm/e820.h>
75 #include <asm/mpspec.h>
76 #include <asm/setup.h>
77 #include <asm/arch_hooks.h>
78 #include <asm/efi.h>
79 #include <asm/sections.h>
80 #include <asm/dmi.h>
81 #include <asm/io_apic.h>
82 #include <asm/ist.h>
83 #include <asm/vmi.h>
84 #include <setup_arch.h>
85 #include <asm/bios_ebda.h>
86 #include <asm/cacheflush.h>
87 #include <asm/processor.h>
88 #include <asm/bugs.h>
89
90 #include <asm/system.h>
91 #include <asm/vsyscall.h>
92 #include <asm/smp.h>
93 #include <asm/desc.h>
94 #include <asm/dma.h>
95 #include <asm/iommu.h>
96 #include <asm/mmu_context.h>
97 #include <asm/proto.h>
98
99 #include <mach_apic.h>
100 #include <asm/paravirt.h>
101
102 #include <asm/percpu.h>
103 #include <asm/topology.h>
104 #include <asm/apicdef.h>
105 #ifdef CONFIG_X86_64
106 #include <asm/numa_64.h>
107 #endif
108
109 #ifndef ARCH_SETUP
110 #define ARCH_SETUP
111 #endif
112
113 #ifndef CONFIG_DEBUG_BOOT_PARAMS
114 struct boot_params __initdata boot_params;
115 #else
116 struct boot_params boot_params;
117 #endif
118
119 /*
120 * Machine setup..
121 */
122 static struct resource data_resource = {
123 .name = "Kernel data",
124 .start = 0,
125 .end = 0,
126 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
127 };
128
129 static struct resource code_resource = {
130 .name = "Kernel code",
131 .start = 0,
132 .end = 0,
133 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
134 };
135
136 static struct resource bss_resource = {
137 .name = "Kernel bss",
138 .start = 0,
139 .end = 0,
140 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
141 };
142
143
144 #ifdef CONFIG_X86_32
145 /* This value is set up by the early boot code to point to the value
146 immediately after the boot time page tables. It contains a *physical*
147 address, and must not be in the .bss segment! */
148 unsigned long init_pg_tables_start __initdata = ~0UL;
149 unsigned long init_pg_tables_end __initdata = ~0UL;
150
151 static struct resource video_ram_resource = {
152 .name = "Video RAM area",
153 .start = 0xa0000,
154 .end = 0xbffff,
155 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
156 };
157
158 /* cpu data as detected by the assembly code in head.S */
159 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1};
160 /* common cpu data for all cpus */
161 struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1};
162 EXPORT_SYMBOL(boot_cpu_data);
163 static void set_mca_bus(int x)
164 {
165 #ifdef CONFIG_MCA
166 MCA_bus = x;
167 #endif
168 }
169
170 unsigned int def_to_bigsmp;
171
172 /* for MCA, but anyone else can use it if they want */
173 unsigned int machine_id;
174 unsigned int machine_submodel_id;
175 unsigned int BIOS_revision;
176
177 struct apm_info apm_info;
178 EXPORT_SYMBOL(apm_info);
179
180 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
181 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
182 struct ist_info ist_info;
183 EXPORT_SYMBOL(ist_info);
184 #else
185 struct ist_info ist_info;
186 #endif
187
188 #else
189 struct cpuinfo_x86 boot_cpu_data __read_mostly;
190 EXPORT_SYMBOL(boot_cpu_data);
191 #endif
192
193
194 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
195 unsigned long mmu_cr4_features;
196 #else
197 unsigned long mmu_cr4_features = X86_CR4_PAE;
198 #endif
199
200 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
201 int bootloader_type;
202
203 /*
204 * Early DMI memory
205 */
206 int dmi_alloc_index;
207 char dmi_alloc_data[DMI_MAX_DATA];
208
209 /*
210 * Setup options
211 */
212 struct screen_info screen_info;
213 EXPORT_SYMBOL(screen_info);
214 struct edid_info edid_info;
215 EXPORT_SYMBOL_GPL(edid_info);
216
217 extern int root_mountflags;
218
219 unsigned long saved_video_mode;
220
221 #define RAMDISK_IMAGE_START_MASK 0x07FF
222 #define RAMDISK_PROMPT_FLAG 0x8000
223 #define RAMDISK_LOAD_FLAG 0x4000
224
225 static char __initdata command_line[COMMAND_LINE_SIZE];
226
227 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
228 struct edd edd;
229 #ifdef CONFIG_EDD_MODULE
230 EXPORT_SYMBOL(edd);
231 #endif
232 /**
233 * copy_edd() - Copy the BIOS EDD information
234 * from boot_params into a safe place.
235 *
236 */
237 static inline void copy_edd(void)
238 {
239 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
240 sizeof(edd.mbr_signature));
241 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
242 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
243 edd.edd_info_nr = boot_params.eddbuf_entries;
244 }
245 #else
246 static inline void copy_edd(void)
247 {
248 }
249 #endif
250
251 #ifdef CONFIG_BLK_DEV_INITRD
252
253 #ifdef CONFIG_X86_32
254
255 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
256 static void __init relocate_initrd(void)
257 {
258
259 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
260 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
261 u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
262 u64 ramdisk_here;
263 unsigned long slop, clen, mapaddr;
264 char *p, *q;
265
266 /* We need to move the initrd down into lowmem */
267 ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size,
268 PAGE_SIZE);
269
270 if (ramdisk_here == -1ULL)
271 panic("Cannot find place for new RAMDISK of size %lld\n",
272 ramdisk_size);
273
274 /* Note: this includes all the lowmem currently occupied by
275 the initrd, we rely on that fact to keep the data intact. */
276 reserve_early(ramdisk_here, ramdisk_here + ramdisk_size,
277 "NEW RAMDISK");
278 initrd_start = ramdisk_here + PAGE_OFFSET;
279 initrd_end = initrd_start + ramdisk_size;
280 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n",
281 ramdisk_here, ramdisk_here + ramdisk_size);
282
283 q = (char *)initrd_start;
284
285 /* Copy any lowmem portion of the initrd */
286 if (ramdisk_image < end_of_lowmem) {
287 clen = end_of_lowmem - ramdisk_image;
288 p = (char *)__va(ramdisk_image);
289 memcpy(q, p, clen);
290 q += clen;
291 ramdisk_image += clen;
292 ramdisk_size -= clen;
293 }
294
295 /* Copy the highmem portion of the initrd */
296 while (ramdisk_size) {
297 slop = ramdisk_image & ~PAGE_MASK;
298 clen = ramdisk_size;
299 if (clen > MAX_MAP_CHUNK-slop)
300 clen = MAX_MAP_CHUNK-slop;
301 mapaddr = ramdisk_image & PAGE_MASK;
302 p = early_ioremap(mapaddr, clen+slop);
303 memcpy(q, p+slop, clen);
304 early_iounmap(p, clen+slop);
305 q += clen;
306 ramdisk_image += clen;
307 ramdisk_size -= clen;
308 }
309 /* high pages is not converted by early_res_to_bootmem */
310 ramdisk_image = boot_params.hdr.ramdisk_image;
311 ramdisk_size = boot_params.hdr.ramdisk_size;
312 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to"
313 " %08llx - %08llx\n",
314 ramdisk_image, ramdisk_image + ramdisk_size - 1,
315 ramdisk_here, ramdisk_here + ramdisk_size - 1);
316 }
317 #endif
318
319 static void __init reserve_initrd(void)
320 {
321 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
322 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
323 u64 ramdisk_end = ramdisk_image + ramdisk_size;
324 u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
325
326 if (!boot_params.hdr.type_of_loader ||
327 !ramdisk_image || !ramdisk_size)
328 return; /* No initrd provided by bootloader */
329
330 initrd_start = 0;
331
332 if (ramdisk_size >= (end_of_lowmem>>1)) {
333 free_early(ramdisk_image, ramdisk_end);
334 printk(KERN_ERR "initrd too large to handle, "
335 "disabling initrd\n");
336 return;
337 }
338
339 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image,
340 ramdisk_end);
341
342
343 if (ramdisk_end <= end_of_lowmem) {
344 /* All in lowmem, easy case */
345 /*
346 * don't need to reserve again, already reserved early
347 * in i386_start_kernel
348 */
349 initrd_start = ramdisk_image + PAGE_OFFSET;
350 initrd_end = initrd_start + ramdisk_size;
351 return;
352 }
353
354 #ifdef CONFIG_X86_32
355 relocate_initrd();
356 #else
357 printk(KERN_ERR "initrd extends beyond end of memory "
358 "(0x%08llx > 0x%08llx)\ndisabling initrd\n",
359 ramdisk_end, end_of_lowmem);
360 initrd_start = 0;
361 #endif
362 free_early(ramdisk_image, ramdisk_end);
363 }
364 #else
365 static void __init reserve_initrd(void)
366 {
367 }
368 #endif /* CONFIG_BLK_DEV_INITRD */
369
370 static void __init parse_setup_data(void)
371 {
372 struct setup_data *data;
373 u64 pa_data;
374
375 if (boot_params.hdr.version < 0x0209)
376 return;
377 pa_data = boot_params.hdr.setup_data;
378 while (pa_data) {
379 data = early_ioremap(pa_data, PAGE_SIZE);
380 switch (data->type) {
381 case SETUP_E820_EXT:
382 parse_e820_ext(data, pa_data);
383 break;
384 default:
385 break;
386 }
387 pa_data = data->next;
388 early_iounmap(data, PAGE_SIZE);
389 }
390 }
391
392 static void __init e820_reserve_setup_data(void)
393 {
394 struct setup_data *data;
395 u64 pa_data;
396 int found = 0;
397
398 if (boot_params.hdr.version < 0x0209)
399 return;
400 pa_data = boot_params.hdr.setup_data;
401 while (pa_data) {
402 data = early_ioremap(pa_data, sizeof(*data));
403 e820_update_range(pa_data, sizeof(*data)+data->len,
404 E820_RAM, E820_RESERVED_KERN);
405 found = 1;
406 pa_data = data->next;
407 early_iounmap(data, sizeof(*data));
408 }
409 if (!found)
410 return;
411
412 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
413 memcpy(&e820_saved, &e820, sizeof(struct e820map));
414 printk(KERN_INFO "extended physical RAM map:\n");
415 e820_print_map("reserve setup_data");
416 }
417
418 static void __init reserve_early_setup_data(void)
419 {
420 struct setup_data *data;
421 u64 pa_data;
422 char buf[32];
423
424 if (boot_params.hdr.version < 0x0209)
425 return;
426 pa_data = boot_params.hdr.setup_data;
427 while (pa_data) {
428 data = early_ioremap(pa_data, sizeof(*data));
429 sprintf(buf, "setup data %x", data->type);
430 reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
431 pa_data = data->next;
432 early_iounmap(data, sizeof(*data));
433 }
434 }
435
436 /*
437 * --------- Crashkernel reservation ------------------------------
438 */
439
440 #ifdef CONFIG_KEXEC
441
442 /**
443 * Reserve @size bytes of crashkernel memory at any suitable offset.
444 *
445 * @size: Size of the crashkernel memory to reserve.
446 * Returns the base address on success, and -1ULL on failure.
447 */
448 unsigned long long __init find_and_reserve_crashkernel(unsigned long long size)
449 {
450 const unsigned long long alignment = 16<<20; /* 16M */
451 unsigned long long start = 0LL;
452
453 while (1) {
454 int ret;
455
456 start = find_e820_area(start, ULONG_MAX, size, alignment);
457 if (start == -1ULL)
458 return start;
459
460 /* try to reserve it */
461 ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE);
462 if (ret >= 0)
463 return start;
464
465 start += alignment;
466 }
467 }
468
469 static inline unsigned long long get_total_mem(void)
470 {
471 unsigned long long total;
472
473 total = max_low_pfn - min_low_pfn;
474 #ifdef CONFIG_HIGHMEM
475 total += highend_pfn - highstart_pfn;
476 #endif
477
478 return total << PAGE_SHIFT;
479 }
480
481 static void __init reserve_crashkernel(void)
482 {
483 unsigned long long total_mem;
484 unsigned long long crash_size, crash_base;
485 int ret;
486
487 total_mem = get_total_mem();
488
489 ret = parse_crashkernel(boot_command_line, total_mem,
490 &crash_size, &crash_base);
491 if (ret != 0 || crash_size <= 0)
492 return;
493
494 /* 0 means: find the address automatically */
495 if (crash_base <= 0) {
496 crash_base = find_and_reserve_crashkernel(crash_size);
497 if (crash_base == -1ULL) {
498 pr_info("crashkernel reservation failed. "
499 "No suitable area found.\n");
500 return;
501 }
502 } else {
503 ret = reserve_bootmem_generic(crash_base, crash_size,
504 BOOTMEM_EXCLUSIVE);
505 if (ret < 0) {
506 pr_info("crashkernel reservation failed - "
507 "memory is in use\n");
508 return;
509 }
510 }
511
512 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
513 "for crashkernel (System RAM: %ldMB)\n",
514 (unsigned long)(crash_size >> 20),
515 (unsigned long)(crash_base >> 20),
516 (unsigned long)(total_mem >> 20));
517
518 crashk_res.start = crash_base;
519 crashk_res.end = crash_base + crash_size - 1;
520 insert_resource(&iomem_resource, &crashk_res);
521 }
522 #else
523 static void __init reserve_crashkernel(void)
524 {
525 }
526 #endif
527
528 static struct resource standard_io_resources[] = {
529 { .name = "dma1", .start = 0x00, .end = 0x1f,
530 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
531 { .name = "pic1", .start = 0x20, .end = 0x21,
532 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
533 { .name = "timer0", .start = 0x40, .end = 0x43,
534 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
535 { .name = "timer1", .start = 0x50, .end = 0x53,
536 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
537 { .name = "keyboard", .start = 0x60, .end = 0x60,
538 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
539 { .name = "keyboard", .start = 0x64, .end = 0x64,
540 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
541 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
542 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
543 { .name = "pic2", .start = 0xa0, .end = 0xa1,
544 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
545 { .name = "dma2", .start = 0xc0, .end = 0xdf,
546 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
547 { .name = "fpu", .start = 0xf0, .end = 0xff,
548 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
549 };
550
551 static void __init reserve_standard_io_resources(void)
552 {
553 int i;
554
555 /* request I/O space for devices used on all i[345]86 PCs */
556 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
557 request_resource(&ioport_resource, &standard_io_resources[i]);
558
559 }
560
561 #ifdef CONFIG_PROC_VMCORE
562 /* elfcorehdr= specifies the location of elf core header
563 * stored by the crashed kernel. This option will be passed
564 * by kexec loader to the capture kernel.
565 */
566 static int __init setup_elfcorehdr(char *arg)
567 {
568 char *end;
569 if (!arg)
570 return -EINVAL;
571 elfcorehdr_addr = memparse(arg, &end);
572 return end > arg ? 0 : -EINVAL;
573 }
574 early_param("elfcorehdr", setup_elfcorehdr);
575 #endif
576
577 static struct x86_quirks default_x86_quirks __initdata;
578
579 struct x86_quirks *x86_quirks __initdata = &default_x86_quirks;
580
581 /*
582 * Some BIOSes seem to corrupt the low 64k of memory during events
583 * like suspend/resume and unplugging an HDMI cable. Reserve all
584 * remaining free memory in that area and fill it with a distinct
585 * pattern.
586 */
587 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
588 #define MAX_SCAN_AREAS 8
589
590 static int __read_mostly memory_corruption_check = 0;
591 static unsigned __read_mostly corruption_check_size = 64*1024;
592 static unsigned __read_mostly corruption_check_period = 60; /* seconds */
593
594 static struct e820entry scan_areas[MAX_SCAN_AREAS];
595 static int num_scan_areas;
596
597
598 static int set_corruption_check(char *arg)
599 {
600 char *end;
601
602 memory_corruption_check = simple_strtol(arg, &end, 10);
603
604 return (*end == 0) ? 0 : -EINVAL;
605 }
606 early_param("memory_corruption_check", set_corruption_check);
607
608 static int set_corruption_check_period(char *arg)
609 {
610 char *end;
611
612 corruption_check_period = simple_strtoul(arg, &end, 10);
613
614 return (*end == 0) ? 0 : -EINVAL;
615 }
616 early_param("memory_corruption_check_period", set_corruption_check_period);
617
618 static int set_corruption_check_size(char *arg)
619 {
620 char *end;
621 unsigned size;
622
623 size = memparse(arg, &end);
624
625 if (*end == '\0')
626 corruption_check_size = size;
627
628 return (size == corruption_check_size) ? 0 : -EINVAL;
629 }
630 early_param("memory_corruption_check_size", set_corruption_check_size);
631
632
633 static void __init setup_bios_corruption_check(void)
634 {
635 u64 addr = PAGE_SIZE; /* assume first page is reserved anyway */
636
637 if (corruption_check_size == 0)
638 memory_corruption_check = 0;
639
640 if (!memory_corruption_check)
641 return;
642
643 corruption_check_size = round_up(corruption_check_size, PAGE_SIZE);
644
645 while(addr < corruption_check_size && num_scan_areas < MAX_SCAN_AREAS) {
646 u64 size;
647 addr = find_e820_area_size(addr, &size, PAGE_SIZE);
648
649 if (addr == 0)
650 break;
651
652 if ((addr + size) > corruption_check_size)
653 size = corruption_check_size - addr;
654
655 if (size == 0)
656 break;
657
658 e820_update_range(addr, size, E820_RAM, E820_RESERVED);
659 scan_areas[num_scan_areas].addr = addr;
660 scan_areas[num_scan_areas].size = size;
661 num_scan_areas++;
662
663 /* Assume we've already mapped this early memory */
664 memset(__va(addr), 0, size);
665
666 addr += size;
667 }
668
669 printk(KERN_INFO "Scanning %d areas for low memory corruption\n",
670 num_scan_areas);
671 update_e820();
672 }
673
674 static struct timer_list periodic_check_timer;
675
676 void check_for_bios_corruption(void)
677 {
678 int i;
679 int corruption = 0;
680
681 if (!memory_corruption_check)
682 return;
683
684 for(i = 0; i < num_scan_areas; i++) {
685 unsigned long *addr = __va(scan_areas[i].addr);
686 unsigned long size = scan_areas[i].size;
687
688 for(; size; addr++, size -= sizeof(unsigned long)) {
689 if (!*addr)
690 continue;
691 printk(KERN_ERR "Corrupted low memory at %p (%lx phys) = %08lx\n",
692 addr, __pa(addr), *addr);
693 corruption = 1;
694 *addr = 0;
695 }
696 }
697
698 WARN(corruption, KERN_ERR "Memory corruption detected in low memory\n");
699 }
700
701 static void periodic_check_for_corruption(unsigned long data)
702 {
703 check_for_bios_corruption();
704 mod_timer(&periodic_check_timer, jiffies + corruption_check_period*HZ);
705 }
706
707 void start_periodic_check_for_corruption(void)
708 {
709 if (!memory_corruption_check || corruption_check_period == 0)
710 return;
711
712 printk(KERN_INFO "Scanning for low memory corruption every %d seconds\n",
713 corruption_check_period);
714
715 init_timer(&periodic_check_timer);
716 periodic_check_timer.function = &periodic_check_for_corruption;
717 periodic_check_for_corruption(0);
718 }
719 #endif
720
721 /*
722 * Determine if we were loaded by an EFI loader. If so, then we have also been
723 * passed the efi memmap, systab, etc., so we should use these data structures
724 * for initialization. Note, the efi init code path is determined by the
725 * global efi_enabled. This allows the same kernel image to be used on existing
726 * systems (with a traditional BIOS) as well as on EFI systems.
727 */
728 /*
729 * setup_arch - architecture-specific boot-time initializations
730 *
731 * Note: On x86_64, fixmaps are ready for use even before this is called.
732 */
733
734 void __init setup_arch(char **cmdline_p)
735 {
736 #ifdef CONFIG_X86_32
737 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
738 visws_early_detect();
739 pre_setup_arch_hook();
740 #else
741 printk(KERN_INFO "Command line: %s\n", boot_command_line);
742 #endif
743
744 early_cpu_init();
745 early_ioremap_init();
746
747 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
748 screen_info = boot_params.screen_info;
749 edid_info = boot_params.edid_info;
750 #ifdef CONFIG_X86_32
751 apm_info.bios = boot_params.apm_bios_info;
752 ist_info = boot_params.ist_info;
753 if (boot_params.sys_desc_table.length != 0) {
754 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
755 machine_id = boot_params.sys_desc_table.table[0];
756 machine_submodel_id = boot_params.sys_desc_table.table[1];
757 BIOS_revision = boot_params.sys_desc_table.table[2];
758 }
759 #endif
760 saved_video_mode = boot_params.hdr.vid_mode;
761 bootloader_type = boot_params.hdr.type_of_loader;
762
763 #ifdef CONFIG_BLK_DEV_RAM
764 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
765 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
766 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
767 #endif
768 #ifdef CONFIG_EFI
769 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
770 #ifdef CONFIG_X86_32
771 "EL32",
772 #else
773 "EL64",
774 #endif
775 4)) {
776 efi_enabled = 1;
777 efi_reserve_early();
778 }
779 #endif
780
781 ARCH_SETUP
782
783 setup_memory_map();
784 parse_setup_data();
785 /* update the e820_saved too */
786 e820_reserve_setup_data();
787
788 copy_edd();
789
790 if (!boot_params.hdr.root_flags)
791 root_mountflags &= ~MS_RDONLY;
792 init_mm.start_code = (unsigned long) _text;
793 init_mm.end_code = (unsigned long) _etext;
794 init_mm.end_data = (unsigned long) _edata;
795 #ifdef CONFIG_X86_32
796 init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
797 #else
798 init_mm.brk = (unsigned long) &_end;
799 #endif
800
801 code_resource.start = virt_to_phys(_text);
802 code_resource.end = virt_to_phys(_etext)-1;
803 data_resource.start = virt_to_phys(_etext);
804 data_resource.end = virt_to_phys(_edata)-1;
805 bss_resource.start = virt_to_phys(&__bss_start);
806 bss_resource.end = virt_to_phys(&__bss_stop)-1;
807
808 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
809 *cmdline_p = command_line;
810
811 parse_early_param();
812
813 #if defined(CONFIG_VMI) && defined(CONFIG_X86_32)
814 /*
815 * Must be before kernel pagetables are setup
816 * or fixmap area is touched.
817 */
818 vmi_init();
819 #endif
820
821 /* after early param, so could get panic from serial */
822 reserve_early_setup_data();
823
824 if (acpi_mps_check()) {
825 #ifdef CONFIG_X86_LOCAL_APIC
826 disable_apic = 1;
827 #endif
828 setup_clear_cpu_cap(X86_FEATURE_APIC);
829 }
830
831 #ifdef CONFIG_PCI
832 if (pci_early_dump_regs)
833 early_dump_pci_devices();
834 #endif
835
836 finish_e820_parsing();
837
838 #ifdef CONFIG_X86_32
839 probe_roms();
840 #endif
841
842 /* after parse_early_param, so could debug it */
843 insert_resource(&iomem_resource, &code_resource);
844 insert_resource(&iomem_resource, &data_resource);
845 insert_resource(&iomem_resource, &bss_resource);
846
847 if (efi_enabled)
848 efi_init();
849
850 #ifdef CONFIG_X86_32
851 if (ppro_with_ram_bug()) {
852 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
853 E820_RESERVED);
854 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
855 printk(KERN_INFO "fixed physical RAM map:\n");
856 e820_print_map("bad_ppro");
857 }
858 #else
859 early_gart_iommu_check();
860 #endif
861
862 /*
863 * partially used pages are not usable - thus
864 * we are rounding upwards:
865 */
866 max_pfn = e820_end_of_ram_pfn();
867
868 /* preallocate 4k for mptable mpc */
869 early_reserve_e820_mpc_new();
870 /* update e820 for memory not covered by WB MTRRs */
871 mtrr_bp_init();
872 if (mtrr_trim_uncached_memory(max_pfn))
873 max_pfn = e820_end_of_ram_pfn();
874
875 #ifdef CONFIG_X86_32
876 /* max_low_pfn get updated here */
877 find_low_pfn_range();
878 #else
879 num_physpages = max_pfn;
880
881 check_efer();
882
883 /* How many end-of-memory variables you have, grandma! */
884 /* need this before calling reserve_initrd */
885 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
886 max_low_pfn = e820_end_of_low_ram_pfn();
887 else
888 max_low_pfn = max_pfn;
889
890 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
891 #endif
892
893 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
894 setup_bios_corruption_check();
895 #endif
896
897 /* max_pfn_mapped is updated here */
898 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
899 max_pfn_mapped = max_low_pfn_mapped;
900
901 #ifdef CONFIG_X86_64
902 if (max_pfn > max_low_pfn) {
903 max_pfn_mapped = init_memory_mapping(1UL<<32,
904 max_pfn<<PAGE_SHIFT);
905 /* can we preseve max_low_pfn ?*/
906 max_low_pfn = max_pfn;
907 }
908 #endif
909
910 /*
911 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
912 */
913
914 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
915 if (init_ohci1394_dma_early)
916 init_ohci1394_dma_on_all_controllers();
917 #endif
918
919 reserve_initrd();
920
921 #ifdef CONFIG_X86_64
922 vsmp_init();
923 #endif
924
925 dmi_scan_machine();
926
927 io_delay_init();
928
929 /*
930 * Parse the ACPI tables for possible boot-time SMP configuration.
931 */
932 acpi_boot_table_init();
933
934 #ifdef CONFIG_ACPI_NUMA
935 /*
936 * Parse SRAT to discover nodes.
937 */
938 acpi_numa_init();
939 #endif
940
941 initmem_init(0, max_pfn);
942
943 #ifdef CONFIG_ACPI_SLEEP
944 /*
945 * Reserve low memory region for sleep support.
946 */
947 acpi_reserve_bootmem();
948 #endif
949 #ifdef CONFIG_X86_FIND_SMP_CONFIG
950 /*
951 * Find and reserve possible boot-time SMP configuration:
952 */
953 find_smp_config();
954 #endif
955 reserve_crashkernel();
956
957 #ifdef CONFIG_X86_64
958 /*
959 * dma32_reserve_bootmem() allocates bootmem which may conflict
960 * with the crashkernel command line, so do that after
961 * reserve_crashkernel()
962 */
963 dma32_reserve_bootmem();
964 #endif
965
966 reserve_ibft_region();
967
968 #ifdef CONFIG_KVM_CLOCK
969 kvmclock_init();
970 #endif
971
972 paravirt_pagetable_setup_start(swapper_pg_dir);
973 paging_init();
974 paravirt_pagetable_setup_done(swapper_pg_dir);
975 paravirt_post_allocator_init();
976
977 #ifdef CONFIG_X86_64
978 map_vsyscall();
979 #endif
980
981 #ifdef CONFIG_X86_GENERICARCH
982 generic_apic_probe();
983 #endif
984
985 early_quirks();
986
987 /*
988 * Read APIC and some other early information from ACPI tables.
989 */
990 acpi_boot_init();
991
992 #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
993 /*
994 * get boot-time SMP configuration:
995 */
996 if (smp_found_config)
997 get_smp_config();
998 #endif
999
1000 prefill_possible_map();
1001 #ifdef CONFIG_X86_64
1002 init_cpu_to_node();
1003 #endif
1004
1005 init_apic_mappings();
1006 ioapic_init_mappings();
1007
1008 kvm_guest_init();
1009
1010 e820_reserve_resources();
1011 e820_mark_nosave_regions(max_low_pfn);
1012
1013 #ifdef CONFIG_X86_32
1014 request_resource(&iomem_resource, &video_ram_resource);
1015 #endif
1016 reserve_standard_io_resources();
1017
1018 e820_setup_gap();
1019
1020 #ifdef CONFIG_VT
1021 #if defined(CONFIG_VGA_CONSOLE)
1022 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1023 conswitchp = &vga_con;
1024 #elif defined(CONFIG_DUMMY_CONSOLE)
1025 conswitchp = &dummy_con;
1026 #endif
1027 #endif
1028 }
Linux kernel - Deliverables
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