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