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Merge branch 'core-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel...
[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 #ifndef ARCH_SETUP
112 #define ARCH_SETUP
113 #endif
114
115 /*
116 * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
117 * The direct mapping extends to max_pfn_mapped, so that we can directly access
118 * apertures, ACPI and other tables without having to play with fixmaps.
119 */
120 unsigned long max_low_pfn_mapped;
121 unsigned long max_pfn_mapped;
122
123 RESERVE_BRK(dmi_alloc, 65536);
124
125 unsigned int boot_cpu_id __read_mostly;
126
127 static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
128 unsigned long _brk_end = (unsigned long)__brk_base;
129
130 #ifdef CONFIG_X86_64
131 int default_cpu_present_to_apicid(int mps_cpu)
132 {
133 return __default_cpu_present_to_apicid(mps_cpu);
134 }
135
136 int default_check_phys_apicid_present(int boot_cpu_physical_apicid)
137 {
138 return __default_check_phys_apicid_present(boot_cpu_physical_apicid);
139 }
140 #endif
141
142 #ifndef CONFIG_DEBUG_BOOT_PARAMS
143 struct boot_params __initdata boot_params;
144 #else
145 struct boot_params boot_params;
146 #endif
147
148 /*
149 * Machine setup..
150 */
151 static struct resource data_resource = {
152 .name = "Kernel data",
153 .start = 0,
154 .end = 0,
155 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
156 };
157
158 static struct resource code_resource = {
159 .name = "Kernel code",
160 .start = 0,
161 .end = 0,
162 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
163 };
164
165 static struct resource bss_resource = {
166 .name = "Kernel bss",
167 .start = 0,
168 .end = 0,
169 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
170 };
171
172
173 #ifdef CONFIG_X86_32
174 static struct resource video_ram_resource = {
175 .name = "Video RAM area",
176 .start = 0xa0000,
177 .end = 0xbffff,
178 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
179 };
180
181 /* cpu data as detected by the assembly code in head.S */
182 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1};
183 /* common cpu data for all cpus */
184 struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1};
185 EXPORT_SYMBOL(boot_cpu_data);
186 static void set_mca_bus(int x)
187 {
188 #ifdef CONFIG_MCA
189 MCA_bus = x;
190 #endif
191 }
192
193 unsigned int def_to_bigsmp;
194
195 /* for MCA, but anyone else can use it if they want */
196 unsigned int machine_id;
197 unsigned int machine_submodel_id;
198 unsigned int BIOS_revision;
199
200 struct apm_info apm_info;
201 EXPORT_SYMBOL(apm_info);
202
203 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
204 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
205 struct ist_info ist_info;
206 EXPORT_SYMBOL(ist_info);
207 #else
208 struct ist_info ist_info;
209 #endif
210
211 #else
212 struct cpuinfo_x86 boot_cpu_data __read_mostly = {
213 .x86_phys_bits = MAX_PHYSMEM_BITS,
214 };
215 EXPORT_SYMBOL(boot_cpu_data);
216 #endif
217
218
219 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
220 unsigned long mmu_cr4_features;
221 #else
222 unsigned long mmu_cr4_features = X86_CR4_PAE;
223 #endif
224
225 /* Boot loader ID and version as integers, for the benefit of proc_dointvec */
226 int bootloader_type, bootloader_version;
227
228 /*
229 * Setup options
230 */
231 struct screen_info screen_info;
232 EXPORT_SYMBOL(screen_info);
233 struct edid_info edid_info;
234 EXPORT_SYMBOL_GPL(edid_info);
235
236 extern int root_mountflags;
237
238 unsigned long saved_video_mode;
239
240 #define RAMDISK_IMAGE_START_MASK 0x07FF
241 #define RAMDISK_PROMPT_FLAG 0x8000
242 #define RAMDISK_LOAD_FLAG 0x4000
243
244 static char __initdata command_line[COMMAND_LINE_SIZE];
245 #ifdef CONFIG_CMDLINE_BOOL
246 static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
247 #endif
248
249 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
250 struct edd edd;
251 #ifdef CONFIG_EDD_MODULE
252 EXPORT_SYMBOL(edd);
253 #endif
254 /**
255 * copy_edd() - Copy the BIOS EDD information
256 * from boot_params into a safe place.
257 *
258 */
259 static inline void copy_edd(void)
260 {
261 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
262 sizeof(edd.mbr_signature));
263 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
264 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
265 edd.edd_info_nr = boot_params.eddbuf_entries;
266 }
267 #else
268 static inline void copy_edd(void)
269 {
270 }
271 #endif
272
273 void * __init extend_brk(size_t size, size_t align)
274 {
275 size_t mask = align - 1;
276 void *ret;
277
278 BUG_ON(_brk_start == 0);
279 BUG_ON(align & mask);
280
281 _brk_end = (_brk_end + mask) & ~mask;
282 BUG_ON((char *)(_brk_end + size) > __brk_limit);
283
284 ret = (void *)_brk_end;
285 _brk_end += size;
286
287 memset(ret, 0, size);
288
289 return ret;
290 }
291
292 #ifdef CONFIG_X86_64
293 static void __init init_gbpages(void)
294 {
295 if (direct_gbpages && cpu_has_gbpages)
296 printk(KERN_INFO "Using GB pages for direct mapping\n");
297 else
298 direct_gbpages = 0;
299 }
300 #else
301 static inline void init_gbpages(void)
302 {
303 }
304 #endif
305
306 static void __init reserve_brk(void)
307 {
308 if (_brk_end > _brk_start)
309 reserve_early(__pa(_brk_start), __pa(_brk_end), "BRK");
310
311 /* Mark brk area as locked down and no longer taking any
312 new allocations */
313 _brk_start = 0;
314 }
315
316 #ifdef CONFIG_BLK_DEV_INITRD
317
318 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
319 static void __init relocate_initrd(void)
320 {
321
322 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
323 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
324 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
325 u64 ramdisk_here;
326 unsigned long slop, clen, mapaddr;
327 char *p, *q;
328
329 /* We need to move the initrd down into lowmem */
330 ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size,
331 PAGE_SIZE);
332
333 if (ramdisk_here == -1ULL)
334 panic("Cannot find place for new RAMDISK of size %lld\n",
335 ramdisk_size);
336
337 /* Note: this includes all the lowmem currently occupied by
338 the initrd, we rely on that fact to keep the data intact. */
339 reserve_early(ramdisk_here, ramdisk_here + ramdisk_size,
340 "NEW RAMDISK");
341 initrd_start = ramdisk_here + PAGE_OFFSET;
342 initrd_end = initrd_start + ramdisk_size;
343 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n",
344 ramdisk_here, ramdisk_here + ramdisk_size);
345
346 q = (char *)initrd_start;
347
348 /* Copy any lowmem portion of the initrd */
349 if (ramdisk_image < end_of_lowmem) {
350 clen = end_of_lowmem - ramdisk_image;
351 p = (char *)__va(ramdisk_image);
352 memcpy(q, p, clen);
353 q += clen;
354 ramdisk_image += clen;
355 ramdisk_size -= clen;
356 }
357
358 /* Copy the highmem portion of the initrd */
359 while (ramdisk_size) {
360 slop = ramdisk_image & ~PAGE_MASK;
361 clen = ramdisk_size;
362 if (clen > MAX_MAP_CHUNK-slop)
363 clen = MAX_MAP_CHUNK-slop;
364 mapaddr = ramdisk_image & PAGE_MASK;
365 p = early_memremap(mapaddr, clen+slop);
366 memcpy(q, p+slop, clen);
367 early_iounmap(p, clen+slop);
368 q += clen;
369 ramdisk_image += clen;
370 ramdisk_size -= clen;
371 }
372 /* high pages is not converted by early_res_to_bootmem */
373 ramdisk_image = boot_params.hdr.ramdisk_image;
374 ramdisk_size = boot_params.hdr.ramdisk_size;
375 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to"
376 " %08llx - %08llx\n",
377 ramdisk_image, ramdisk_image + ramdisk_size - 1,
378 ramdisk_here, ramdisk_here + ramdisk_size - 1);
379 }
380
381 static void __init reserve_initrd(void)
382 {
383 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
384 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
385 u64 ramdisk_end = ramdisk_image + ramdisk_size;
386 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
387
388 if (!boot_params.hdr.type_of_loader ||
389 !ramdisk_image || !ramdisk_size)
390 return; /* No initrd provided by bootloader */
391
392 initrd_start = 0;
393
394 if (ramdisk_size >= (end_of_lowmem>>1)) {
395 free_early(ramdisk_image, ramdisk_end);
396 printk(KERN_ERR "initrd too large to handle, "
397 "disabling initrd\n");
398 return;
399 }
400
401 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image,
402 ramdisk_end);
403
404
405 if (ramdisk_end <= end_of_lowmem) {
406 /* All in lowmem, easy case */
407 /*
408 * don't need to reserve again, already reserved early
409 * in i386_start_kernel
410 */
411 initrd_start = ramdisk_image + PAGE_OFFSET;
412 initrd_end = initrd_start + ramdisk_size;
413 return;
414 }
415
416 relocate_initrd();
417
418 free_early(ramdisk_image, ramdisk_end);
419 }
420 #else
421 static void __init reserve_initrd(void)
422 {
423 }
424 #endif /* CONFIG_BLK_DEV_INITRD */
425
426 static void __init parse_setup_data(void)
427 {
428 struct setup_data *data;
429 u64 pa_data;
430
431 if (boot_params.hdr.version < 0x0209)
432 return;
433 pa_data = boot_params.hdr.setup_data;
434 while (pa_data) {
435 data = early_memremap(pa_data, PAGE_SIZE);
436 switch (data->type) {
437 case SETUP_E820_EXT:
438 parse_e820_ext(data, pa_data);
439 break;
440 default:
441 break;
442 }
443 pa_data = data->next;
444 early_iounmap(data, PAGE_SIZE);
445 }
446 }
447
448 static void __init e820_reserve_setup_data(void)
449 {
450 struct setup_data *data;
451 u64 pa_data;
452 int found = 0;
453
454 if (boot_params.hdr.version < 0x0209)
455 return;
456 pa_data = boot_params.hdr.setup_data;
457 while (pa_data) {
458 data = early_memremap(pa_data, sizeof(*data));
459 e820_update_range(pa_data, sizeof(*data)+data->len,
460 E820_RAM, E820_RESERVED_KERN);
461 found = 1;
462 pa_data = data->next;
463 early_iounmap(data, sizeof(*data));
464 }
465 if (!found)
466 return;
467
468 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
469 memcpy(&e820_saved, &e820, sizeof(struct e820map));
470 printk(KERN_INFO "extended physical RAM map:\n");
471 e820_print_map("reserve setup_data");
472 }
473
474 static void __init reserve_early_setup_data(void)
475 {
476 struct setup_data *data;
477 u64 pa_data;
478 char buf[32];
479
480 if (boot_params.hdr.version < 0x0209)
481 return;
482 pa_data = boot_params.hdr.setup_data;
483 while (pa_data) {
484 data = early_memremap(pa_data, sizeof(*data));
485 sprintf(buf, "setup data %x", data->type);
486 reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
487 pa_data = data->next;
488 early_iounmap(data, sizeof(*data));
489 }
490 }
491
492 /*
493 * --------- Crashkernel reservation ------------------------------
494 */
495
496 #ifdef CONFIG_KEXEC
497
498 /**
499 * Reserve @size bytes of crashkernel memory at any suitable offset.
500 *
501 * @size: Size of the crashkernel memory to reserve.
502 * Returns the base address on success, and -1ULL on failure.
503 */
504 static
505 unsigned long long __init find_and_reserve_crashkernel(unsigned long long size)
506 {
507 const unsigned long long alignment = 16<<20; /* 16M */
508 unsigned long long start = 0LL;
509
510 while (1) {
511 int ret;
512
513 start = find_e820_area(start, ULONG_MAX, size, alignment);
514 if (start == -1ULL)
515 return start;
516
517 /* try to reserve it */
518 ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE);
519 if (ret >= 0)
520 return start;
521
522 start += alignment;
523 }
524 }
525
526 static inline unsigned long long get_total_mem(void)
527 {
528 unsigned long long total;
529
530 total = max_low_pfn - min_low_pfn;
531 #ifdef CONFIG_HIGHMEM
532 total += highend_pfn - highstart_pfn;
533 #endif
534
535 return total << PAGE_SHIFT;
536 }
537
538 static void __init reserve_crashkernel(void)
539 {
540 unsigned long long total_mem;
541 unsigned long long crash_size, crash_base;
542 int ret;
543
544 total_mem = get_total_mem();
545
546 ret = parse_crashkernel(boot_command_line, total_mem,
547 &crash_size, &crash_base);
548 if (ret != 0 || crash_size <= 0)
549 return;
550
551 /* 0 means: find the address automatically */
552 if (crash_base <= 0) {
553 crash_base = find_and_reserve_crashkernel(crash_size);
554 if (crash_base == -1ULL) {
555 pr_info("crashkernel reservation failed. "
556 "No suitable area found.\n");
557 return;
558 }
559 } else {
560 ret = reserve_bootmem_generic(crash_base, crash_size,
561 BOOTMEM_EXCLUSIVE);
562 if (ret < 0) {
563 pr_info("crashkernel reservation failed - "
564 "memory is in use\n");
565 return;
566 }
567 }
568
569 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
570 "for crashkernel (System RAM: %ldMB)\n",
571 (unsigned long)(crash_size >> 20),
572 (unsigned long)(crash_base >> 20),
573 (unsigned long)(total_mem >> 20));
574
575 crashk_res.start = crash_base;
576 crashk_res.end = crash_base + crash_size - 1;
577 insert_resource(&iomem_resource, &crashk_res);
578 }
579 #else
580 static void __init reserve_crashkernel(void)
581 {
582 }
583 #endif
584
585 static struct resource standard_io_resources[] = {
586 { .name = "dma1", .start = 0x00, .end = 0x1f,
587 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
588 { .name = "pic1", .start = 0x20, .end = 0x21,
589 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
590 { .name = "timer0", .start = 0x40, .end = 0x43,
591 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
592 { .name = "timer1", .start = 0x50, .end = 0x53,
593 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
594 { .name = "keyboard", .start = 0x60, .end = 0x60,
595 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
596 { .name = "keyboard", .start = 0x64, .end = 0x64,
597 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
598 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
599 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
600 { .name = "pic2", .start = 0xa0, .end = 0xa1,
601 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
602 { .name = "dma2", .start = 0xc0, .end = 0xdf,
603 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
604 { .name = "fpu", .start = 0xf0, .end = 0xff,
605 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
606 };
607
608 static void __init reserve_standard_io_resources(void)
609 {
610 int i;
611
612 /* request I/O space for devices used on all i[345]86 PCs */
613 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
614 request_resource(&ioport_resource, &standard_io_resources[i]);
615
616 }
617
618 /*
619 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
620 * is_kdump_kernel() to determine if we are booting after a panic. Hence
621 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
622 */
623
624 #ifdef CONFIG_CRASH_DUMP
625 /* elfcorehdr= specifies the location of elf core header
626 * stored by the crashed kernel. This option will be passed
627 * by kexec loader to the capture kernel.
628 */
629 static int __init setup_elfcorehdr(char *arg)
630 {
631 char *end;
632 if (!arg)
633 return -EINVAL;
634 elfcorehdr_addr = memparse(arg, &end);
635 return end > arg ? 0 : -EINVAL;
636 }
637 early_param("elfcorehdr", setup_elfcorehdr);
638 #endif
639
640 static struct x86_quirks default_x86_quirks __initdata;
641
642 struct x86_quirks *x86_quirks __initdata = &default_x86_quirks;
643
644 #ifdef CONFIG_X86_RESERVE_LOW_64K
645 static int __init dmi_low_memory_corruption(const struct dmi_system_id *d)
646 {
647 printk(KERN_NOTICE
648 "%s detected: BIOS may corrupt low RAM, working around it.\n",
649 d->ident);
650
651 e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED);
652 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
653
654 return 0;
655 }
656 #endif
657
658 /* List of systems that have known low memory corruption BIOS problems */
659 static struct dmi_system_id __initdata bad_bios_dmi_table[] = {
660 #ifdef CONFIG_X86_RESERVE_LOW_64K
661 {
662 .callback = dmi_low_memory_corruption,
663 .ident = "AMI BIOS",
664 .matches = {
665 DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
666 },
667 },
668 {
669 .callback = dmi_low_memory_corruption,
670 .ident = "Phoenix BIOS",
671 .matches = {
672 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"),
673 },
674 },
675 #endif
676 {}
677 };
678
679 /*
680 * Determine if we were loaded by an EFI loader. If so, then we have also been
681 * passed the efi memmap, systab, etc., so we should use these data structures
682 * for initialization. Note, the efi init code path is determined by the
683 * global efi_enabled. This allows the same kernel image to be used on existing
684 * systems (with a traditional BIOS) as well as on EFI systems.
685 */
686 /*
687 * setup_arch - architecture-specific boot-time initializations
688 *
689 * Note: On x86_64, fixmaps are ready for use even before this is called.
690 */
691
692 void __init setup_arch(char **cmdline_p)
693 {
694 #ifdef CONFIG_X86_32
695 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
696 visws_early_detect();
697 #else
698 printk(KERN_INFO "Command line: %s\n", boot_command_line);
699 #endif
700
701 /* VMI may relocate the fixmap; do this before touching ioremap area */
702 vmi_init();
703
704 early_cpu_init();
705 early_ioremap_init();
706
707 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
708 screen_info = boot_params.screen_info;
709 edid_info = boot_params.edid_info;
710 #ifdef CONFIG_X86_32
711 apm_info.bios = boot_params.apm_bios_info;
712 ist_info = boot_params.ist_info;
713 if (boot_params.sys_desc_table.length != 0) {
714 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
715 machine_id = boot_params.sys_desc_table.table[0];
716 machine_submodel_id = boot_params.sys_desc_table.table[1];
717 BIOS_revision = boot_params.sys_desc_table.table[2];
718 }
719 #endif
720 saved_video_mode = boot_params.hdr.vid_mode;
721 bootloader_type = boot_params.hdr.type_of_loader;
722 if ((bootloader_type >> 4) == 0xe) {
723 bootloader_type &= 0xf;
724 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
725 }
726 bootloader_version = bootloader_type & 0xf;
727 bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
728
729 #ifdef CONFIG_BLK_DEV_RAM
730 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
731 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
732 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
733 #endif
734 #ifdef CONFIG_EFI
735 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
736 #ifdef CONFIG_X86_32
737 "EL32",
738 #else
739 "EL64",
740 #endif
741 4)) {
742 efi_enabled = 1;
743 efi_reserve_early();
744 }
745 #endif
746
747 ARCH_SETUP
748
749 setup_memory_map();
750 parse_setup_data();
751 /* update the e820_saved too */
752 e820_reserve_setup_data();
753
754 copy_edd();
755
756 if (!boot_params.hdr.root_flags)
757 root_mountflags &= ~MS_RDONLY;
758 init_mm.start_code = (unsigned long) _text;
759 init_mm.end_code = (unsigned long) _etext;
760 init_mm.end_data = (unsigned long) _edata;
761 init_mm.brk = _brk_end;
762
763 code_resource.start = virt_to_phys(_text);
764 code_resource.end = virt_to_phys(_etext)-1;
765 data_resource.start = virt_to_phys(_etext);
766 data_resource.end = virt_to_phys(_edata)-1;
767 bss_resource.start = virt_to_phys(&__bss_start);
768 bss_resource.end = virt_to_phys(&__bss_stop)-1;
769
770 #ifdef CONFIG_CMDLINE_BOOL
771 #ifdef CONFIG_CMDLINE_OVERRIDE
772 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
773 #else
774 if (builtin_cmdline[0]) {
775 /* append boot loader cmdline to builtin */
776 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
777 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
778 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
779 }
780 #endif
781 #endif
782
783 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
784 *cmdline_p = command_line;
785
786 parse_early_param();
787
788 #ifdef CONFIG_X86_64
789 check_efer();
790 #endif
791
792 /* Must be before kernel pagetables are setup */
793 vmi_activate();
794
795 /* after early param, so could get panic from serial */
796 reserve_early_setup_data();
797
798 if (acpi_mps_check()) {
799 #ifdef CONFIG_X86_LOCAL_APIC
800 disable_apic = 1;
801 #endif
802 setup_clear_cpu_cap(X86_FEATURE_APIC);
803 }
804
805 #ifdef CONFIG_PCI
806 if (pci_early_dump_regs)
807 early_dump_pci_devices();
808 #endif
809
810 finish_e820_parsing();
811
812 if (efi_enabled)
813 efi_init();
814
815 dmi_scan_machine();
816
817 dmi_check_system(bad_bios_dmi_table);
818
819 /*
820 * VMware detection requires dmi to be available, so this
821 * needs to be done after dmi_scan_machine, for the BP.
822 */
823 init_hypervisor(&boot_cpu_data);
824
825 #ifdef CONFIG_X86_32
826 probe_roms();
827 #endif
828
829 /* after parse_early_param, so could debug it */
830 insert_resource(&iomem_resource, &code_resource);
831 insert_resource(&iomem_resource, &data_resource);
832 insert_resource(&iomem_resource, &bss_resource);
833
834
835 #ifdef CONFIG_X86_32
836 if (ppro_with_ram_bug()) {
837 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
838 E820_RESERVED);
839 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
840 printk(KERN_INFO "fixed physical RAM map:\n");
841 e820_print_map("bad_ppro");
842 }
843 #else
844 early_gart_iommu_check();
845 #endif
846
847 /*
848 * partially used pages are not usable - thus
849 * we are rounding upwards:
850 */
851 max_pfn = e820_end_of_ram_pfn();
852
853 /* preallocate 4k for mptable mpc */
854 early_reserve_e820_mpc_new();
855 /* update e820 for memory not covered by WB MTRRs */
856 mtrr_bp_init();
857 if (mtrr_trim_uncached_memory(max_pfn))
858 max_pfn = e820_end_of_ram_pfn();
859
860 #ifdef CONFIG_X86_32
861 /* max_low_pfn get updated here */
862 find_low_pfn_range();
863 #else
864 num_physpages = max_pfn;
865
866 check_x2apic();
867
868 /* How many end-of-memory variables you have, grandma! */
869 /* need this before calling reserve_initrd */
870 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
871 max_low_pfn = e820_end_of_low_ram_pfn();
872 else
873 max_low_pfn = max_pfn;
874
875 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
876 max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT;
877 #endif
878
879 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
880 setup_bios_corruption_check();
881 #endif
882
883 printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n",
884 max_pfn_mapped<<PAGE_SHIFT);
885
886 reserve_brk();
887
888 init_gbpages();
889
890 /* max_pfn_mapped is updated here */
891 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
892 max_pfn_mapped = max_low_pfn_mapped;
893
894 #ifdef CONFIG_X86_64
895 if (max_pfn > max_low_pfn) {
896 max_pfn_mapped = init_memory_mapping(1UL<<32,
897 max_pfn<<PAGE_SHIFT);
898 /* can we preseve max_low_pfn ?*/
899 max_low_pfn = max_pfn;
900 }
901 #endif
902
903 /*
904 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
905 */
906
907 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
908 if (init_ohci1394_dma_early)
909 init_ohci1394_dma_on_all_controllers();
910 #endif
911
912 reserve_initrd();
913
914 vsmp_init();
915
916 io_delay_init();
917
918 /*
919 * Parse the ACPI tables for possible boot-time SMP configuration.
920 */
921 acpi_boot_table_init();
922
923 early_acpi_boot_init();
924
925 #ifdef CONFIG_ACPI_NUMA
926 /*
927 * Parse SRAT to discover nodes.
928 */
929 acpi_numa_init();
930 #endif
931
932 initmem_init(0, max_pfn);
933
934 #ifdef CONFIG_ACPI_SLEEP
935 /*
936 * Reserve low memory region for sleep support.
937 */
938 acpi_reserve_bootmem();
939 #endif
940 /*
941 * Find and reserve possible boot-time SMP configuration:
942 */
943 find_smp_config();
944
945 reserve_crashkernel();
946
947 #ifdef CONFIG_X86_64
948 /*
949 * dma32_reserve_bootmem() allocates bootmem which may conflict
950 * with the crashkernel command line, so do that after
951 * reserve_crashkernel()
952 */
953 dma32_reserve_bootmem();
954 #endif
955
956 reserve_ibft_region();
957
958 #ifdef CONFIG_KVM_CLOCK
959 kvmclock_init();
960 #endif
961
962 paravirt_pagetable_setup_start(swapper_pg_dir);
963 paging_init();
964 paravirt_pagetable_setup_done(swapper_pg_dir);
965 paravirt_post_allocator_init();
966
967 #ifdef CONFIG_X86_64
968 map_vsyscall();
969 #endif
970
971 generic_apic_probe();
972
973 early_quirks();
974
975 /*
976 * Read APIC and some other early information from ACPI tables.
977 */
978 acpi_boot_init();
979
980 #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
981 /*
982 * get boot-time SMP configuration:
983 */
984 if (smp_found_config)
985 get_smp_config();
986 #endif
987
988 prefill_possible_map();
989
990 #ifdef CONFIG_X86_64
991 init_cpu_to_node();
992 #endif
993
994 init_apic_mappings();
995 ioapic_init_mappings();
996
997 /* need to wait for io_apic is mapped */
998 probe_nr_irqs_gsi();
999
1000 kvm_guest_init();
1001
1002 e820_reserve_resources();
1003 e820_mark_nosave_regions(max_low_pfn);
1004
1005 #ifdef CONFIG_X86_32
1006 request_resource(&iomem_resource, &video_ram_resource);
1007 #endif
1008 reserve_standard_io_resources();
1009
1010 e820_setup_gap();
1011
1012 #ifdef CONFIG_VT
1013 #if defined(CONFIG_VGA_CONSOLE)
1014 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1015 conswitchp = &vga_con;
1016 #elif defined(CONFIG_DUMMY_CONSOLE)
1017 conswitchp = &dummy_con;
1018 #endif
1019 #endif
1020 }
1021
1022 #ifdef CONFIG_X86_32
1023
1024 /**
1025 * x86_quirk_intr_init - post gate setup interrupt initialisation
1026 *
1027 * Description:
1028 * Fill in any interrupts that may have been left out by the general
1029 * init_IRQ() routine. interrupts having to do with the machine rather
1030 * than the devices on the I/O bus (like APIC interrupts in intel MP
1031 * systems) are started here.
1032 **/
1033 void __init x86_quirk_intr_init(void)
1034 {
1035 if (x86_quirks->arch_intr_init) {
1036 if (x86_quirks->arch_intr_init())
1037 return;
1038 }
1039 }
1040
1041 /**
1042 * x86_quirk_trap_init - initialise system specific traps
1043 *
1044 * Description:
1045 * Called as the final act of trap_init(). Used in VISWS to initialise
1046 * the various board specific APIC traps.
1047 **/
1048 void __init x86_quirk_trap_init(void)
1049 {
1050 if (x86_quirks->arch_trap_init) {
1051 if (x86_quirks->arch_trap_init())
1052 return;
1053 }
1054 }
1055
1056 static struct irqaction irq0 = {
1057 .handler = timer_interrupt,
1058 .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER,
1059 .name = "timer"
1060 };
1061
1062 /**
1063 * x86_quirk_pre_time_init - do any specific initialisations before.
1064 *
1065 **/
1066 void __init x86_quirk_pre_time_init(void)
1067 {
1068 if (x86_quirks->arch_pre_time_init)
1069 x86_quirks->arch_pre_time_init();
1070 }
1071
1072 /**
1073 * x86_quirk_time_init - do any specific initialisations for the system timer.
1074 *
1075 * Description:
1076 * Must plug the system timer interrupt source at HZ into the IRQ listed
1077 * in irq_vectors.h:TIMER_IRQ
1078 **/
1079 void __init x86_quirk_time_init(void)
1080 {
1081 if (x86_quirks->arch_time_init) {
1082 /*
1083 * A nonzero return code does not mean failure, it means
1084 * that the architecture quirk does not want any
1085 * generic (timer) setup to be performed after this:
1086 */
1087 if (x86_quirks->arch_time_init())
1088 return;
1089 }
1090
1091 irq0.mask = cpumask_of_cpu(0);
1092 setup_irq(0, &irq0);
1093 }
1094 #endif /* CONFIG_X86_32 */
Linux kernel - Deliverables
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