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[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/efi.h>
78 #include <asm/timer.h>
79 #include <asm/i8259.h>
80 #include <asm/sections.h>
81 #include <asm/dmi.h>
82 #include <asm/io_apic.h>
83 #include <asm/ist.h>
84 #include <asm/vmi.h>
85 #include <asm/setup_arch.h>
86 #include <asm/bios_ebda.h>
87 #include <asm/cacheflush.h>
88 #include <asm/processor.h>
89 #include <asm/bugs.h>
90
91 #include <asm/system.h>
92 #include <asm/vsyscall.h>
93 #include <asm/cpu.h>
94 #include <asm/desc.h>
95 #include <asm/dma.h>
96 #include <asm/iommu.h>
97 #include <asm/gart.h>
98 #include <asm/mmu_context.h>
99 #include <asm/proto.h>
100
101 #include <asm/paravirt.h>
102 #include <asm/hypervisor.h>
103
104 #include <asm/percpu.h>
105 #include <asm/topology.h>
106 #include <asm/apicdef.h>
107 #ifdef CONFIG_X86_64
108 #include <asm/numa_64.h>
109 #endif
110
111 /*
112 * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
113 * The direct mapping extends to max_pfn_mapped, so that we can directly access
114 * apertures, ACPI and other tables without having to play with fixmaps.
115 */
116 unsigned long max_low_pfn_mapped;
117 unsigned long max_pfn_mapped;
118
119 RESERVE_BRK(dmi_alloc, 65536);
120
121 unsigned int boot_cpu_id __read_mostly;
122
123 static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
124 unsigned long _brk_end = (unsigned long)__brk_base;
125
126 #ifdef CONFIG_X86_64
127 int default_cpu_present_to_apicid(int mps_cpu)
128 {
129 return __default_cpu_present_to_apicid(mps_cpu);
130 }
131
132 int default_check_phys_apicid_present(int boot_cpu_physical_apicid)
133 {
134 return __default_check_phys_apicid_present(boot_cpu_physical_apicid);
135 }
136 #endif
137
138 #ifndef CONFIG_DEBUG_BOOT_PARAMS
139 struct boot_params __initdata boot_params;
140 #else
141 struct boot_params boot_params;
142 #endif
143
144 /*
145 * Machine setup..
146 */
147 static struct resource data_resource = {
148 .name = "Kernel data",
149 .start = 0,
150 .end = 0,
151 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
152 };
153
154 static struct resource code_resource = {
155 .name = "Kernel code",
156 .start = 0,
157 .end = 0,
158 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
159 };
160
161 static struct resource bss_resource = {
162 .name = "Kernel bss",
163 .start = 0,
164 .end = 0,
165 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
166 };
167
168
169 #ifdef CONFIG_X86_32
170 /* cpu data as detected by the assembly code in head.S */
171 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1};
172 /* common cpu data for all cpus */
173 struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1};
174 EXPORT_SYMBOL(boot_cpu_data);
175 static void set_mca_bus(int x)
176 {
177 #ifdef CONFIG_MCA
178 MCA_bus = x;
179 #endif
180 }
181
182 unsigned int def_to_bigsmp;
183
184 /* for MCA, but anyone else can use it if they want */
185 unsigned int machine_id;
186 unsigned int machine_submodel_id;
187 unsigned int BIOS_revision;
188
189 struct apm_info apm_info;
190 EXPORT_SYMBOL(apm_info);
191
192 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
193 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
194 struct ist_info ist_info;
195 EXPORT_SYMBOL(ist_info);
196 #else
197 struct ist_info ist_info;
198 #endif
199
200 #else
201 struct cpuinfo_x86 boot_cpu_data __read_mostly = {
202 .x86_phys_bits = MAX_PHYSMEM_BITS,
203 };
204 EXPORT_SYMBOL(boot_cpu_data);
205 #endif
206
207
208 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
209 unsigned long mmu_cr4_features;
210 #else
211 unsigned long mmu_cr4_features = X86_CR4_PAE;
212 #endif
213
214 /* Boot loader ID and version as integers, for the benefit of proc_dointvec */
215 int bootloader_type, bootloader_version;
216
217 /*
218 * Setup options
219 */
220 struct screen_info screen_info;
221 EXPORT_SYMBOL(screen_info);
222 struct edid_info edid_info;
223 EXPORT_SYMBOL_GPL(edid_info);
224
225 extern int root_mountflags;
226
227 unsigned long saved_video_mode;
228
229 #define RAMDISK_IMAGE_START_MASK 0x07FF
230 #define RAMDISK_PROMPT_FLAG 0x8000
231 #define RAMDISK_LOAD_FLAG 0x4000
232
233 static char __initdata command_line[COMMAND_LINE_SIZE];
234 #ifdef CONFIG_CMDLINE_BOOL
235 static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
236 #endif
237
238 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
239 struct edd edd;
240 #ifdef CONFIG_EDD_MODULE
241 EXPORT_SYMBOL(edd);
242 #endif
243 /**
244 * copy_edd() - Copy the BIOS EDD information
245 * from boot_params into a safe place.
246 *
247 */
248 static inline void copy_edd(void)
249 {
250 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
251 sizeof(edd.mbr_signature));
252 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
253 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
254 edd.edd_info_nr = boot_params.eddbuf_entries;
255 }
256 #else
257 static inline void copy_edd(void)
258 {
259 }
260 #endif
261
262 void * __init extend_brk(size_t size, size_t align)
263 {
264 size_t mask = align - 1;
265 void *ret;
266
267 BUG_ON(_brk_start == 0);
268 BUG_ON(align & mask);
269
270 _brk_end = (_brk_end + mask) & ~mask;
271 BUG_ON((char *)(_brk_end + size) > __brk_limit);
272
273 ret = (void *)_brk_end;
274 _brk_end += size;
275
276 memset(ret, 0, size);
277
278 return ret;
279 }
280
281 #ifdef CONFIG_X86_64
282 static void __init init_gbpages(void)
283 {
284 if (direct_gbpages && cpu_has_gbpages)
285 printk(KERN_INFO "Using GB pages for direct mapping\n");
286 else
287 direct_gbpages = 0;
288 }
289 #else
290 static inline void init_gbpages(void)
291 {
292 }
293 #endif
294
295 static void __init reserve_brk(void)
296 {
297 if (_brk_end > _brk_start)
298 reserve_early(__pa(_brk_start), __pa(_brk_end), "BRK");
299
300 /* Mark brk area as locked down and no longer taking any
301 new allocations */
302 _brk_start = 0;
303 }
304
305 #ifdef CONFIG_BLK_DEV_INITRD
306
307 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
308 static void __init relocate_initrd(void)
309 {
310
311 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
312 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
313 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
314 u64 ramdisk_here;
315 unsigned long slop, clen, mapaddr;
316 char *p, *q;
317
318 /* We need to move the initrd down into lowmem */
319 ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size,
320 PAGE_SIZE);
321
322 if (ramdisk_here == -1ULL)
323 panic("Cannot find place for new RAMDISK of size %lld\n",
324 ramdisk_size);
325
326 /* Note: this includes all the lowmem currently occupied by
327 the initrd, we rely on that fact to keep the data intact. */
328 reserve_early(ramdisk_here, ramdisk_here + ramdisk_size,
329 "NEW RAMDISK");
330 initrd_start = ramdisk_here + PAGE_OFFSET;
331 initrd_end = initrd_start + ramdisk_size;
332 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n",
333 ramdisk_here, ramdisk_here + ramdisk_size);
334
335 q = (char *)initrd_start;
336
337 /* Copy any lowmem portion of the initrd */
338 if (ramdisk_image < end_of_lowmem) {
339 clen = end_of_lowmem - ramdisk_image;
340 p = (char *)__va(ramdisk_image);
341 memcpy(q, p, clen);
342 q += clen;
343 ramdisk_image += clen;
344 ramdisk_size -= clen;
345 }
346
347 /* Copy the highmem portion of the initrd */
348 while (ramdisk_size) {
349 slop = ramdisk_image & ~PAGE_MASK;
350 clen = ramdisk_size;
351 if (clen > MAX_MAP_CHUNK-slop)
352 clen = MAX_MAP_CHUNK-slop;
353 mapaddr = ramdisk_image & PAGE_MASK;
354 p = early_memremap(mapaddr, clen+slop);
355 memcpy(q, p+slop, clen);
356 early_iounmap(p, clen+slop);
357 q += clen;
358 ramdisk_image += clen;
359 ramdisk_size -= clen;
360 }
361 /* high pages is not converted by early_res_to_bootmem */
362 ramdisk_image = boot_params.hdr.ramdisk_image;
363 ramdisk_size = boot_params.hdr.ramdisk_size;
364 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to"
365 " %08llx - %08llx\n",
366 ramdisk_image, ramdisk_image + ramdisk_size - 1,
367 ramdisk_here, ramdisk_here + ramdisk_size - 1);
368 }
369
370 static void __init reserve_initrd(void)
371 {
372 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
373 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
374 u64 ramdisk_end = ramdisk_image + ramdisk_size;
375 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
376
377 if (!boot_params.hdr.type_of_loader ||
378 !ramdisk_image || !ramdisk_size)
379 return; /* No initrd provided by bootloader */
380
381 initrd_start = 0;
382
383 if (ramdisk_size >= (end_of_lowmem>>1)) {
384 free_early(ramdisk_image, ramdisk_end);
385 printk(KERN_ERR "initrd too large to handle, "
386 "disabling initrd\n");
387 return;
388 }
389
390 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image,
391 ramdisk_end);
392
393
394 if (ramdisk_end <= end_of_lowmem) {
395 /* All in lowmem, easy case */
396 /*
397 * don't need to reserve again, already reserved early
398 * in i386_start_kernel
399 */
400 initrd_start = ramdisk_image + PAGE_OFFSET;
401 initrd_end = initrd_start + ramdisk_size;
402 return;
403 }
404
405 relocate_initrd();
406
407 free_early(ramdisk_image, ramdisk_end);
408 }
409 #else
410 static void __init reserve_initrd(void)
411 {
412 }
413 #endif /* CONFIG_BLK_DEV_INITRD */
414
415 static void __init parse_setup_data(void)
416 {
417 struct setup_data *data;
418 u64 pa_data;
419
420 if (boot_params.hdr.version < 0x0209)
421 return;
422 pa_data = boot_params.hdr.setup_data;
423 while (pa_data) {
424 data = early_memremap(pa_data, PAGE_SIZE);
425 switch (data->type) {
426 case SETUP_E820_EXT:
427 parse_e820_ext(data, pa_data);
428 break;
429 default:
430 break;
431 }
432 pa_data = data->next;
433 early_iounmap(data, PAGE_SIZE);
434 }
435 }
436
437 static void __init e820_reserve_setup_data(void)
438 {
439 struct setup_data *data;
440 u64 pa_data;
441 int found = 0;
442
443 if (boot_params.hdr.version < 0x0209)
444 return;
445 pa_data = boot_params.hdr.setup_data;
446 while (pa_data) {
447 data = early_memremap(pa_data, sizeof(*data));
448 e820_update_range(pa_data, sizeof(*data)+data->len,
449 E820_RAM, E820_RESERVED_KERN);
450 found = 1;
451 pa_data = data->next;
452 early_iounmap(data, sizeof(*data));
453 }
454 if (!found)
455 return;
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
463 static void __init reserve_early_setup_data(void)
464 {
465 struct setup_data *data;
466 u64 pa_data;
467 char buf[32];
468
469 if (boot_params.hdr.version < 0x0209)
470 return;
471 pa_data = boot_params.hdr.setup_data;
472 while (pa_data) {
473 data = early_memremap(pa_data, sizeof(*data));
474 sprintf(buf, "setup data %x", data->type);
475 reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
476 pa_data = data->next;
477 early_iounmap(data, sizeof(*data));
478 }
479 }
480
481 /*
482 * --------- Crashkernel reservation ------------------------------
483 */
484
485 #ifdef CONFIG_KEXEC
486
487 /**
488 * Reserve @size bytes of crashkernel memory at any suitable offset.
489 *
490 * @size: Size of the crashkernel memory to reserve.
491 * Returns the base address on success, and -1ULL on failure.
492 */
493 static
494 unsigned long long __init find_and_reserve_crashkernel(unsigned long long size)
495 {
496 const unsigned long long alignment = 16<<20; /* 16M */
497 unsigned long long start = 0LL;
498
499 while (1) {
500 int ret;
501
502 start = find_e820_area(start, ULONG_MAX, size, alignment);
503 if (start == -1ULL)
504 return start;
505
506 /* try to reserve it */
507 ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE);
508 if (ret >= 0)
509 return start;
510
511 start += alignment;
512 }
513 }
514
515 static inline unsigned long long get_total_mem(void)
516 {
517 unsigned long long total;
518
519 total = max_low_pfn - min_low_pfn;
520 #ifdef CONFIG_HIGHMEM
521 total += highend_pfn - highstart_pfn;
522 #endif
523
524 return total << PAGE_SHIFT;
525 }
526
527 static void __init reserve_crashkernel(void)
528 {
529 unsigned long long total_mem;
530 unsigned long long crash_size, crash_base;
531 int ret;
532
533 total_mem = get_total_mem();
534
535 ret = parse_crashkernel(boot_command_line, total_mem,
536 &crash_size, &crash_base);
537 if (ret != 0 || crash_size <= 0)
538 return;
539
540 /* 0 means: find the address automatically */
541 if (crash_base <= 0) {
542 crash_base = find_and_reserve_crashkernel(crash_size);
543 if (crash_base == -1ULL) {
544 pr_info("crashkernel reservation failed. "
545 "No suitable area found.\n");
546 return;
547 }
548 } else {
549 ret = reserve_bootmem_generic(crash_base, crash_size,
550 BOOTMEM_EXCLUSIVE);
551 if (ret < 0) {
552 pr_info("crashkernel reservation failed - "
553 "memory is in use\n");
554 return;
555 }
556 }
557
558 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
559 "for crashkernel (System RAM: %ldMB)\n",
560 (unsigned long)(crash_size >> 20),
561 (unsigned long)(crash_base >> 20),
562 (unsigned long)(total_mem >> 20));
563
564 crashk_res.start = crash_base;
565 crashk_res.end = crash_base + crash_size - 1;
566 insert_resource(&iomem_resource, &crashk_res);
567 }
568 #else
569 static void __init reserve_crashkernel(void)
570 {
571 }
572 #endif
573
574 static struct resource standard_io_resources[] = {
575 { .name = "dma1", .start = 0x00, .end = 0x1f,
576 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
577 { .name = "pic1", .start = 0x20, .end = 0x21,
578 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
579 { .name = "timer0", .start = 0x40, .end = 0x43,
580 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
581 { .name = "timer1", .start = 0x50, .end = 0x53,
582 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
583 { .name = "keyboard", .start = 0x60, .end = 0x60,
584 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
585 { .name = "keyboard", .start = 0x64, .end = 0x64,
586 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
587 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
588 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
589 { .name = "pic2", .start = 0xa0, .end = 0xa1,
590 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
591 { .name = "dma2", .start = 0xc0, .end = 0xdf,
592 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
593 { .name = "fpu", .start = 0xf0, .end = 0xff,
594 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
595 };
596
597 void __init reserve_standard_io_resources(void)
598 {
599 int i;
600
601 /* request I/O space for devices used on all i[345]86 PCs */
602 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
603 request_resource(&ioport_resource, &standard_io_resources[i]);
604
605 }
606
607 /*
608 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
609 * is_kdump_kernel() to determine if we are booting after a panic. Hence
610 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
611 */
612
613 #ifdef CONFIG_CRASH_DUMP
614 /* elfcorehdr= specifies the location of elf core header
615 * stored by the crashed kernel. This option will be passed
616 * by kexec loader to the capture kernel.
617 */
618 static int __init setup_elfcorehdr(char *arg)
619 {
620 char *end;
621 if (!arg)
622 return -EINVAL;
623 elfcorehdr_addr = memparse(arg, &end);
624 return end > arg ? 0 : -EINVAL;
625 }
626 early_param("elfcorehdr", setup_elfcorehdr);
627 #endif
628
629 #ifdef CONFIG_X86_RESERVE_LOW_64K
630 static int __init dmi_low_memory_corruption(const struct dmi_system_id *d)
631 {
632 printk(KERN_NOTICE
633 "%s detected: BIOS may corrupt low RAM, working around it.\n",
634 d->ident);
635
636 e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED);
637 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
638
639 return 0;
640 }
641 #endif
642
643 /* List of systems that have known low memory corruption BIOS problems */
644 static struct dmi_system_id __initdata bad_bios_dmi_table[] = {
645 #ifdef CONFIG_X86_RESERVE_LOW_64K
646 {
647 .callback = dmi_low_memory_corruption,
648 .ident = "AMI BIOS",
649 .matches = {
650 DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
651 },
652 },
653 {
654 .callback = dmi_low_memory_corruption,
655 .ident = "Phoenix BIOS",
656 .matches = {
657 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"),
658 },
659 },
660 {
661 /*
662 * AMI BIOS with low memory corruption was found on Intel DG45ID board.
663 * It hase different DMI_BIOS_VENDOR = "Intel Corp.", for now we will
664 * match only DMI_BOARD_NAME and see if there is more bad products
665 * with this vendor.
666 */
667 .callback = dmi_low_memory_corruption,
668 .ident = "AMI BIOS",
669 .matches = {
670 DMI_MATCH(DMI_BOARD_NAME, "DG45ID"),
671 },
672 },
673 #endif
674 {}
675 };
676
677 /*
678 * Determine if we were loaded by an EFI loader. If so, then we have also been
679 * passed the efi memmap, systab, etc., so we should use these data structures
680 * for initialization. Note, the efi init code path is determined by the
681 * global efi_enabled. This allows the same kernel image to be used on existing
682 * systems (with a traditional BIOS) as well as on EFI systems.
683 */
684 /*
685 * setup_arch - architecture-specific boot-time initializations
686 *
687 * Note: On x86_64, fixmaps are ready for use even before this is called.
688 */
689
690 void __init setup_arch(char **cmdline_p)
691 {
692 #ifdef CONFIG_X86_32
693 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
694 visws_early_detect();
695 #else
696 printk(KERN_INFO "Command line: %s\n", boot_command_line);
697 #endif
698
699 /* VMI may relocate the fixmap; do this before touching ioremap area */
700 vmi_init();
701
702 early_cpu_init();
703 early_ioremap_init();
704
705 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
706 screen_info = boot_params.screen_info;
707 edid_info = boot_params.edid_info;
708 #ifdef CONFIG_X86_32
709 apm_info.bios = boot_params.apm_bios_info;
710 ist_info = boot_params.ist_info;
711 if (boot_params.sys_desc_table.length != 0) {
712 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
713 machine_id = boot_params.sys_desc_table.table[0];
714 machine_submodel_id = boot_params.sys_desc_table.table[1];
715 BIOS_revision = boot_params.sys_desc_table.table[2];
716 }
717 #endif
718 saved_video_mode = boot_params.hdr.vid_mode;
719 bootloader_type = boot_params.hdr.type_of_loader;
720 if ((bootloader_type >> 4) == 0xe) {
721 bootloader_type &= 0xf;
722 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
723 }
724 bootloader_version = bootloader_type & 0xf;
725 bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
726
727 #ifdef CONFIG_BLK_DEV_RAM
728 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
729 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
730 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
731 #endif
732 #ifdef CONFIG_EFI
733 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
734 #ifdef CONFIG_X86_32
735 "EL32",
736 #else
737 "EL64",
738 #endif
739 4)) {
740 efi_enabled = 1;
741 efi_reserve_early();
742 }
743 #endif
744
745 x86_init.oem.arch_setup();
746
747 setup_memory_map();
748 parse_setup_data();
749 /* update the e820_saved too */
750 e820_reserve_setup_data();
751
752 copy_edd();
753
754 if (!boot_params.hdr.root_flags)
755 root_mountflags &= ~MS_RDONLY;
756 init_mm.start_code = (unsigned long) _text;
757 init_mm.end_code = (unsigned long) _etext;
758 init_mm.end_data = (unsigned long) _edata;
759 init_mm.brk = _brk_end;
760
761 code_resource.start = virt_to_phys(_text);
762 code_resource.end = virt_to_phys(_etext)-1;
763 data_resource.start = virt_to_phys(_etext);
764 data_resource.end = virt_to_phys(_edata)-1;
765 bss_resource.start = virt_to_phys(&__bss_start);
766 bss_resource.end = virt_to_phys(&__bss_stop)-1;
767
768 #ifdef CONFIG_CMDLINE_BOOL
769 #ifdef CONFIG_CMDLINE_OVERRIDE
770 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
771 #else
772 if (builtin_cmdline[0]) {
773 /* append boot loader cmdline to builtin */
774 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
775 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
776 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
777 }
778 #endif
779 #endif
780
781 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
782 *cmdline_p = command_line;
783
784 parse_early_param();
785
786 #ifdef CONFIG_X86_64
787 check_efer();
788 #endif
789
790 /* Must be before kernel pagetables are setup */
791 vmi_activate();
792
793 /* after early param, so could get panic from serial */
794 reserve_early_setup_data();
795
796 if (acpi_mps_check()) {
797 #ifdef CONFIG_X86_LOCAL_APIC
798 disable_apic = 1;
799 #endif
800 setup_clear_cpu_cap(X86_FEATURE_APIC);
801 }
802
803 #ifdef CONFIG_PCI
804 if (pci_early_dump_regs)
805 early_dump_pci_devices();
806 #endif
807
808 finish_e820_parsing();
809
810 if (efi_enabled)
811 efi_init();
812
813 dmi_scan_machine();
814
815 dmi_check_system(bad_bios_dmi_table);
816
817 /*
818 * VMware detection requires dmi to be available, so this
819 * needs to be done after dmi_scan_machine, for the BP.
820 */
821 init_hypervisor_platform();
822
823 x86_init.resources.probe_roms();
824
825 /* after parse_early_param, so could debug it */
826 insert_resource(&iomem_resource, &code_resource);
827 insert_resource(&iomem_resource, &data_resource);
828 insert_resource(&iomem_resource, &bss_resource);
829
830
831 #ifdef CONFIG_X86_32
832 if (ppro_with_ram_bug()) {
833 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
834 E820_RESERVED);
835 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
836 printk(KERN_INFO "fixed physical RAM map:\n");
837 e820_print_map("bad_ppro");
838 }
839 #else
840 early_gart_iommu_check();
841 #endif
842
843 /*
844 * partially used pages are not usable - thus
845 * we are rounding upwards:
846 */
847 max_pfn = e820_end_of_ram_pfn();
848
849 /* preallocate 4k for mptable mpc */
850 early_reserve_e820_mpc_new();
851 /* update e820 for memory not covered by WB MTRRs */
852 mtrr_bp_init();
853 if (mtrr_trim_uncached_memory(max_pfn))
854 max_pfn = e820_end_of_ram_pfn();
855
856 #ifdef CONFIG_X86_32
857 /* max_low_pfn get updated here */
858 find_low_pfn_range();
859 #else
860 num_physpages = max_pfn;
861
862 check_x2apic();
863
864 /* How many end-of-memory variables you have, grandma! */
865 /* need this before calling reserve_initrd */
866 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
867 max_low_pfn = e820_end_of_low_ram_pfn();
868 else
869 max_low_pfn = max_pfn;
870
871 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
872 max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT;
873 #endif
874
875 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
876 setup_bios_corruption_check();
877 #endif
878
879 printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n",
880 max_pfn_mapped<<PAGE_SHIFT);
881
882 reserve_brk();
883
884 init_gbpages();
885
886 /* max_pfn_mapped is updated here */
887 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
888 max_pfn_mapped = max_low_pfn_mapped;
889
890 #ifdef CONFIG_X86_64
891 if (max_pfn > max_low_pfn) {
892 max_pfn_mapped = init_memory_mapping(1UL<<32,
893 max_pfn<<PAGE_SHIFT);
894 /* can we preseve max_low_pfn ?*/
895 max_low_pfn = max_pfn;
896 }
897 #endif
898
899 /*
900 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
901 */
902
903 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
904 if (init_ohci1394_dma_early)
905 init_ohci1394_dma_on_all_controllers();
906 #endif
907
908 reserve_initrd();
909
910 vsmp_init();
911
912 io_delay_init();
913
914 /*
915 * Parse the ACPI tables for possible boot-time SMP configuration.
916 */
917 acpi_boot_table_init();
918
919 early_acpi_boot_init();
920
921 #ifdef CONFIG_ACPI_NUMA
922 /*
923 * Parse SRAT to discover nodes.
924 */
925 acpi_numa_init();
926 #endif
927
928 initmem_init(0, max_pfn);
929
930 #ifdef CONFIG_ACPI_SLEEP
931 /*
932 * Reserve low memory region for sleep support.
933 */
934 acpi_reserve_bootmem();
935 #endif
936 /*
937 * Find and reserve possible boot-time SMP configuration:
938 */
939 find_smp_config();
940
941 reserve_crashkernel();
942
943 #ifdef CONFIG_X86_64
944 /*
945 * dma32_reserve_bootmem() allocates bootmem which may conflict
946 * with the crashkernel command line, so do that after
947 * reserve_crashkernel()
948 */
949 dma32_reserve_bootmem();
950 #endif
951
952 reserve_ibft_region();
953
954 #ifdef CONFIG_KVM_CLOCK
955 kvmclock_init();
956 #endif
957
958 x86_init.paging.pagetable_setup_start(swapper_pg_dir);
959 paging_init();
960 x86_init.paging.pagetable_setup_done(swapper_pg_dir);
961
962 #ifdef CONFIG_X86_64
963 map_vsyscall();
964 #endif
965
966 generic_apic_probe();
967
968 early_quirks();
969
970 /*
971 * Read APIC and some other early information from ACPI tables.
972 */
973 acpi_boot_init();
974
975 /*
976 * get boot-time SMP configuration:
977 */
978 if (smp_found_config)
979 get_smp_config();
980
981 prefill_possible_map();
982
983 #ifdef CONFIG_X86_64
984 init_cpu_to_node();
985 #endif
986
987 init_apic_mappings();
988 ioapic_init_mappings();
989
990 /* need to wait for io_apic is mapped */
991 probe_nr_irqs_gsi();
992
993 kvm_guest_init();
994
995 e820_reserve_resources();
996 e820_mark_nosave_regions(max_low_pfn);
997
998 x86_init.resources.reserve_resources();
999
1000 e820_setup_gap();
1001
1002 #ifdef CONFIG_VT
1003 #if defined(CONFIG_VGA_CONSOLE)
1004 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1005 conswitchp = &vga_con;
1006 #elif defined(CONFIG_DUMMY_CONSOLE)
1007 conswitchp = &dummy_con;
1008 #endif
1009 #endif
1010 x86_init.oem.banner();
1011 }
1012
1013 #ifdef CONFIG_X86_32
1014
1015 static struct resource video_ram_resource = {
1016 .name = "Video RAM area",
1017 .start = 0xa0000,
1018 .end = 0xbffff,
1019 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
1020 };
1021
1022 void __init i386_reserve_resources(void)
1023 {
1024 request_resource(&iomem_resource, &video_ram_resource);
1025 reserve_standard_io_resources();
1026 }
1027
1028 #endif /* CONFIG_X86_32 */
Linux kernel - Deliverables
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