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/gart.h>
97 #include <asm/mmu_context.h>
98 #include <asm/proto.h>
99
100 #include <mach_apic.h>
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 #ifndef CONFIG_DEBUG_BOOT_PARAMS
116 struct boot_params __initdata boot_params;
117 #else
118 struct boot_params boot_params;
119 #endif
120
121 /*
122 * Machine setup..
123 */
124 static struct resource data_resource = {
125 .name = "Kernel data",
126 .start = 0,
127 .end = 0,
128 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
129 };
130
131 static struct resource code_resource = {
132 .name = "Kernel code",
133 .start = 0,
134 .end = 0,
135 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
136 };
137
138 static struct resource bss_resource = {
139 .name = "Kernel bss",
140 .start = 0,
141 .end = 0,
142 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
143 };
144
145
146 #ifdef CONFIG_X86_32
147 /* This value is set up by the early boot code to point to the value
148 immediately after the boot time page tables. It contains a *physical*
149 address, and must not be in the .bss segment! */
150 unsigned long init_pg_tables_start __initdata = ~0UL;
151 unsigned long init_pg_tables_end __initdata = ~0UL;
152
153 static struct resource video_ram_resource = {
154 .name = "Video RAM area",
155 .start = 0xa0000,
156 .end = 0xbffff,
157 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
158 };
159
160 /* cpu data as detected by the assembly code in head.S */
161 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1};
162 /* common cpu data for all cpus */
163 struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1};
164 EXPORT_SYMBOL(boot_cpu_data);
set_mca_bus(int x)165 static void set_mca_bus(int x)
166 {
167 #ifdef CONFIG_MCA
168 MCA_bus = x;
169 #endif
170 }
171
172 unsigned int def_to_bigsmp;
173
174 /* for MCA, but anyone else can use it if they want */
175 unsigned int machine_id;
176 unsigned int machine_submodel_id;
177 unsigned int BIOS_revision;
178
179 struct apm_info apm_info;
180 EXPORT_SYMBOL(apm_info);
181
182 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
183 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
184 struct ist_info ist_info;
185 EXPORT_SYMBOL(ist_info);
186 #else
187 struct ist_info ist_info;
188 #endif
189
190 #else
191 struct cpuinfo_x86 boot_cpu_data __read_mostly;
192 EXPORT_SYMBOL(boot_cpu_data);
193 #endif
194
195
196 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
197 unsigned long mmu_cr4_features;
198 #else
199 unsigned long mmu_cr4_features = X86_CR4_PAE;
200 #endif
201
202 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
203 int bootloader_type;
204
205 /*
206 * Early DMI memory
207 */
208 int dmi_alloc_index;
209 char dmi_alloc_data[DMI_MAX_DATA];
210
211 /*
212 * Setup options
213 */
214 struct screen_info screen_info;
215 EXPORT_SYMBOL(screen_info);
216 struct edid_info edid_info;
217 EXPORT_SYMBOL_GPL(edid_info);
218
219 extern int root_mountflags;
220
221 unsigned long saved_video_mode;
222
223 #define RAMDISK_IMAGE_START_MASK 0x07FF
224 #define RAMDISK_PROMPT_FLAG 0x8000
225 #define RAMDISK_LOAD_FLAG 0x4000
226
227 static char __initdata command_line[COMMAND_LINE_SIZE];
228 #ifdef CONFIG_CMDLINE_BOOL
229 static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
230 #endif
231
232 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
233 struct edd edd;
234 #ifdef CONFIG_EDD_MODULE
235 EXPORT_SYMBOL(edd);
236 #endif
237 /**
238 * copy_edd() - Copy the BIOS EDD information
239 * from boot_params into a safe place.
240 *
241 */
copy_edd(void)242 static inline void copy_edd(void)
243 {
244 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
245 sizeof(edd.mbr_signature));
246 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
247 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
248 edd.edd_info_nr = boot_params.eddbuf_entries;
249 }
250 #else
copy_edd(void)251 static inline void copy_edd(void)
252 {
253 }
254 #endif
255
256 #ifdef CONFIG_BLK_DEV_INITRD
257
258 #ifdef CONFIG_X86_32
259
260 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
relocate_initrd(void)261 static void __init relocate_initrd(void)
262 {
263
264 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
265 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
266 u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
267 u64 ramdisk_here;
268 unsigned long slop, clen, mapaddr;
269 char *p, *q;
270
271 /* We need to move the initrd down into lowmem */
272 ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size,
273 PAGE_SIZE);
274
275 if (ramdisk_here == -1ULL)
276 panic("Cannot find place for new RAMDISK of size %lld\n",
277 ramdisk_size);
278
279 /* Note: this includes all the lowmem currently occupied by
280 the initrd, we rely on that fact to keep the data intact. */
281 reserve_early(ramdisk_here, ramdisk_here + ramdisk_size,
282 "NEW RAMDISK");
283 initrd_start = ramdisk_here + PAGE_OFFSET;
284 initrd_end = initrd_start + ramdisk_size;
285 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n",
286 ramdisk_here, ramdisk_here + ramdisk_size);
287
288 q = (char *)initrd_start;
289
290 /* Copy any lowmem portion of the initrd */
291 if (ramdisk_image < end_of_lowmem) {
292 clen = end_of_lowmem - ramdisk_image;
293 p = (char *)__va(ramdisk_image);
294 memcpy(q, p, clen);
295 q += clen;
296 ramdisk_image += clen;
297 ramdisk_size -= clen;
298 }
299
300 /* Copy the highmem portion of the initrd */
301 while (ramdisk_size) {
302 slop = ramdisk_image & ~PAGE_MASK;
303 clen = ramdisk_size;
304 if (clen > MAX_MAP_CHUNK-slop)
305 clen = MAX_MAP_CHUNK-slop;
306 mapaddr = ramdisk_image & PAGE_MASK;
307 p = early_memremap(mapaddr, clen+slop);
308 memcpy(q, p+slop, clen);
309 early_iounmap(p, clen+slop);
310 q += clen;
311 ramdisk_image += clen;
312 ramdisk_size -= clen;
313 }
314 /* high pages is not converted by early_res_to_bootmem */
315 ramdisk_image = boot_params.hdr.ramdisk_image;
316 ramdisk_size = boot_params.hdr.ramdisk_size;
317 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to"
318 " %08llx - %08llx\n",
319 ramdisk_image, ramdisk_image + ramdisk_size - 1,
320 ramdisk_here, ramdisk_here + ramdisk_size - 1);
321 }
322 #endif
323
reserve_initrd(void)324 static void __init reserve_initrd(void)
325 {
326 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
327 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
328 u64 ramdisk_end = ramdisk_image + ramdisk_size;
329 u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
330
331 if (!boot_params.hdr.type_of_loader ||
332 !ramdisk_image || !ramdisk_size)
333 return; /* No initrd provided by bootloader */
334
335 initrd_start = 0;
336
337 if (ramdisk_size >= (end_of_lowmem>>1)) {
338 free_early(ramdisk_image, ramdisk_end);
339 printk(KERN_ERR "initrd too large to handle, "
340 "disabling initrd\n");
341 return;
342 }
343
344 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image,
345 ramdisk_end);
346
347
348 if (ramdisk_end <= end_of_lowmem) {
349 /* All in lowmem, easy case */
350 /*
351 * don't need to reserve again, already reserved early
352 * in i386_start_kernel
353 */
354 initrd_start = ramdisk_image + PAGE_OFFSET;
355 initrd_end = initrd_start + ramdisk_size;
356 return;
357 }
358
359 #ifdef CONFIG_X86_32
360 relocate_initrd();
361 #else
362 printk(KERN_ERR "initrd extends beyond end of memory "
363 "(0x%08llx > 0x%08llx)\ndisabling initrd\n",
364 ramdisk_end, end_of_lowmem);
365 initrd_start = 0;
366 #endif
367 free_early(ramdisk_image, ramdisk_end);
368 }
369 #else
reserve_initrd(void)370 static void __init reserve_initrd(void)
371 {
372 }
373 #endif /* CONFIG_BLK_DEV_INITRD */
374
parse_setup_data(void)375 static void __init parse_setup_data(void)
376 {
377 struct setup_data *data;
378 u64 pa_data;
379
380 if (boot_params.hdr.version < 0x0209)
381 return;
382 pa_data = boot_params.hdr.setup_data;
383 while (pa_data) {
384 data = early_memremap(pa_data, PAGE_SIZE);
385 switch (data->type) {
386 case SETUP_E820_EXT:
387 parse_e820_ext(data, pa_data);
388 break;
389 default:
390 break;
391 }
392 pa_data = data->next;
393 early_iounmap(data, PAGE_SIZE);
394 }
395 }
396
e820_reserve_setup_data(void)397 static void __init e820_reserve_setup_data(void)
398 {
399 struct setup_data *data;
400 u64 pa_data;
401 int found = 0;
402
403 if (boot_params.hdr.version < 0x0209)
404 return;
405 pa_data = boot_params.hdr.setup_data;
406 while (pa_data) {
407 data = early_memremap(pa_data, sizeof(*data));
408 e820_update_range(pa_data, sizeof(*data)+data->len,
409 E820_RAM, E820_RESERVED_KERN);
410 found = 1;
411 pa_data = data->next;
412 early_iounmap(data, sizeof(*data));
413 }
414 if (!found)
415 return;
416
417 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
418 memcpy(&e820_saved, &e820, sizeof(struct e820map));
419 printk(KERN_INFO "extended physical RAM map:\n");
420 e820_print_map("reserve setup_data");
421 }
422
reserve_early_setup_data(void)423 static void __init reserve_early_setup_data(void)
424 {
425 struct setup_data *data;
426 u64 pa_data;
427 char buf[32];
428
429 if (boot_params.hdr.version < 0x0209)
430 return;
431 pa_data = boot_params.hdr.setup_data;
432 while (pa_data) {
433 data = early_memremap(pa_data, sizeof(*data));
434 sprintf(buf, "setup data %x", data->type);
435 reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
436 pa_data = data->next;
437 early_iounmap(data, sizeof(*data));
438 }
439 }
440
441 /*
442 * --------- Crashkernel reservation ------------------------------
443 */
444
445 #ifdef CONFIG_KEXEC
446
447 /**
448 * Reserve @size bytes of crashkernel memory at any suitable offset.
449 *
450 * @size: Size of the crashkernel memory to reserve.
451 * Returns the base address on success, and -1ULL on failure.
452 */
453 static
find_and_reserve_crashkernel(unsigned long long size)454 unsigned long long __init find_and_reserve_crashkernel(unsigned long long size)
455 {
456 const unsigned long long alignment = 16<<20; /* 16M */
457 unsigned long long start = 0LL;
458
459 while (1) {
460 int ret;
461
462 start = find_e820_area(start, ULONG_MAX, size, alignment);
463 if (start == -1ULL)
464 return start;
465
466 /* try to reserve it */
467 ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE);
468 if (ret >= 0)
469 return start;
470
471 start += alignment;
472 }
473 }
474
get_total_mem(void)475 static inline unsigned long long get_total_mem(void)
476 {
477 unsigned long long total;
478
479 total = max_low_pfn - min_low_pfn;
480 #ifdef CONFIG_HIGHMEM
481 total += highend_pfn - highstart_pfn;
482 #endif
483
484 return total << PAGE_SHIFT;
485 }
486
reserve_crashkernel(void)487 static void __init reserve_crashkernel(void)
488 {
489 unsigned long long total_mem;
490 unsigned long long crash_size, crash_base;
491 int ret;
492
493 total_mem = get_total_mem();
494
495 ret = parse_crashkernel(boot_command_line, total_mem,
496 &crash_size, &crash_base);
497 if (ret != 0 || crash_size <= 0)
498 return;
499
500 /* 0 means: find the address automatically */
501 if (crash_base <= 0) {
502 crash_base = find_and_reserve_crashkernel(crash_size);
503 if (crash_base == -1ULL) {
504 pr_info("crashkernel reservation failed. "
505 "No suitable area found.\n");
506 return;
507 }
508 } else {
509 ret = reserve_bootmem_generic(crash_base, crash_size,
510 BOOTMEM_EXCLUSIVE);
511 if (ret < 0) {
512 pr_info("crashkernel reservation failed - "
513 "memory is in use\n");
514 return;
515 }
516 }
517
518 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
519 "for crashkernel (System RAM: %ldMB)\n",
520 (unsigned long)(crash_size >> 20),
521 (unsigned long)(crash_base >> 20),
522 (unsigned long)(total_mem >> 20));
523
524 crashk_res.start = crash_base;
525 crashk_res.end = crash_base + crash_size - 1;
526 insert_resource(&iomem_resource, &crashk_res);
527 }
528 #else
reserve_crashkernel(void)529 static void __init reserve_crashkernel(void)
530 {
531 }
532 #endif
533
534 static struct resource standard_io_resources[] = {
535 { .name = "dma1", .start = 0x00, .end = 0x1f,
536 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
537 { .name = "pic1", .start = 0x20, .end = 0x21,
538 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
539 { .name = "timer0", .start = 0x40, .end = 0x43,
540 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
541 { .name = "timer1", .start = 0x50, .end = 0x53,
542 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
543 { .name = "keyboard", .start = 0x60, .end = 0x60,
544 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
545 { .name = "keyboard", .start = 0x64, .end = 0x64,
546 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
547 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
548 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
549 { .name = "pic2", .start = 0xa0, .end = 0xa1,
550 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
551 { .name = "dma2", .start = 0xc0, .end = 0xdf,
552 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
553 { .name = "fpu", .start = 0xf0, .end = 0xff,
554 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
555 };
556
reserve_standard_io_resources(void)557 static void __init reserve_standard_io_resources(void)
558 {
559 int i;
560
561 /* request I/O space for devices used on all i[345]86 PCs */
562 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
563 request_resource(&ioport_resource, &standard_io_resources[i]);
564
565 }
566
567 /*
568 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
569 * is_kdump_kernel() to determine if we are booting after a panic. Hence
570 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
571 */
572
573 #ifdef CONFIG_CRASH_DUMP
574 /* elfcorehdr= specifies the location of elf core header
575 * stored by the crashed kernel. This option will be passed
576 * by kexec loader to the capture kernel.
577 */
setup_elfcorehdr(char * arg)578 static int __init setup_elfcorehdr(char *arg)
579 {
580 char *end;
581 if (!arg)
582 return -EINVAL;
583 elfcorehdr_addr = memparse(arg, &end);
584 return end > arg ? 0 : -EINVAL;
585 }
586 early_param("elfcorehdr", setup_elfcorehdr);
587 #endif
588
default_update_genapic(void)589 static int __init default_update_genapic(void)
590 {
591 #ifdef CONFIG_X86_SMP
592 # if defined(CONFIG_X86_GENERICARCH) || defined(CONFIG_X86_64)
593 genapic->wakeup_cpu = wakeup_secondary_cpu_via_init;
594 # endif
595 #endif
596
597 return 0;
598 }
599
600 static struct x86_quirks default_x86_quirks __initdata = {
601 .update_genapic = default_update_genapic,
602 };
603
604 struct x86_quirks *x86_quirks __initdata = &default_x86_quirks;
605
606 #ifdef CONFIG_X86_RESERVE_LOW_64K
dmi_low_memory_corruption(const struct dmi_system_id * d)607 static int __init dmi_low_memory_corruption(const struct dmi_system_id *d)
608 {
609 printk(KERN_NOTICE
610 "%s detected: BIOS may corrupt low RAM, working around it.\n",
611 d->ident);
612
613 e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED);
614 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
615
616 return 0;
617 }
618 #endif
619
620 /* List of systems that have known low memory corruption BIOS problems */
621 static struct dmi_system_id __initdata bad_bios_dmi_table[] = {
622 #ifdef CONFIG_X86_RESERVE_LOW_64K
623 {
624 .callback = dmi_low_memory_corruption,
625 .ident = "AMI BIOS",
626 .matches = {
627 DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
628 },
629 },
630 {
631 .callback = dmi_low_memory_corruption,
632 .ident = "Phoenix BIOS",
633 .matches = {
634 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"),
635 },
636 },
637 #endif
638 {}
639 };
640
641 /*
642 * Determine if we were loaded by an EFI loader. If so, then we have also been
643 * passed the efi memmap, systab, etc., so we should use these data structures
644 * for initialization. Note, the efi init code path is determined by the
645 * global efi_enabled. This allows the same kernel image to be used on existing
646 * systems (with a traditional BIOS) as well as on EFI systems.
647 */
648 /*
649 * setup_arch - architecture-specific boot-time initializations
650 *
651 * Note: On x86_64, fixmaps are ready for use even before this is called.
652 */
653
setup_arch(char ** cmdline_p)654 void __init setup_arch(char **cmdline_p)
655 {
656 #ifdef CONFIG_X86_32
657 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
658 visws_early_detect();
659 pre_setup_arch_hook();
660 #else
661 printk(KERN_INFO "Command line: %s\n", boot_command_line);
662 #endif
663
664 /* VMI may relocate the fixmap; do this before touching ioremap area */
665 vmi_init();
666
667 early_cpu_init();
668 early_ioremap_init();
669
670 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
671 screen_info = boot_params.screen_info;
672 edid_info = boot_params.edid_info;
673 #ifdef CONFIG_X86_32
674 apm_info.bios = boot_params.apm_bios_info;
675 ist_info = boot_params.ist_info;
676 if (boot_params.sys_desc_table.length != 0) {
677 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
678 machine_id = boot_params.sys_desc_table.table[0];
679 machine_submodel_id = boot_params.sys_desc_table.table[1];
680 BIOS_revision = boot_params.sys_desc_table.table[2];
681 }
682 #endif
683 saved_video_mode = boot_params.hdr.vid_mode;
684 bootloader_type = boot_params.hdr.type_of_loader;
685
686 #ifdef CONFIG_BLK_DEV_RAM
687 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
688 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
689 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
690 #endif
691 #ifdef CONFIG_EFI
692 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
693 #ifdef CONFIG_X86_32
694 "EL32",
695 #else
696 "EL64",
697 #endif
698 4)) {
699 efi_enabled = 1;
700 efi_reserve_early();
701 }
702 #endif
703
704 ARCH_SETUP
705
706 setup_memory_map();
707 parse_setup_data();
708 /* update the e820_saved too */
709 e820_reserve_setup_data();
710
711 copy_edd();
712
713 if (!boot_params.hdr.root_flags)
714 root_mountflags &= ~MS_RDONLY;
715 init_mm.start_code = (unsigned long) _text;
716 init_mm.end_code = (unsigned long) _etext;
717 init_mm.end_data = (unsigned long) _edata;
718 #ifdef CONFIG_X86_32
719 init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
720 #else
721 init_mm.brk = (unsigned long) &_end;
722 #endif
723
724 code_resource.start = virt_to_phys(_text);
725 code_resource.end = virt_to_phys(_etext)-1;
726 data_resource.start = virt_to_phys(_etext);
727 data_resource.end = virt_to_phys(_edata)-1;
728 bss_resource.start = virt_to_phys(&__bss_start);
729 bss_resource.end = virt_to_phys(&__bss_stop)-1;
730
731 #ifdef CONFIG_CMDLINE_BOOL
732 #ifdef CONFIG_CMDLINE_OVERRIDE
733 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
734 #else
735 if (builtin_cmdline[0]) {
736 /* append boot loader cmdline to builtin */
737 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
738 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
739 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
740 }
741 #endif
742 #endif
743
744 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
745 *cmdline_p = command_line;
746
747 parse_early_param();
748
749 #ifdef CONFIG_X86_64
750 check_efer();
751 #endif
752
753 /* Must be before kernel pagetables are setup */
754 vmi_activate();
755
756 /* after early param, so could get panic from serial */
757 reserve_early_setup_data();
758
759 if (acpi_mps_check()) {
760 #ifdef CONFIG_X86_LOCAL_APIC
761 disable_apic = 1;
762 #endif
763 setup_clear_cpu_cap(X86_FEATURE_APIC);
764 }
765
766 #ifdef CONFIG_PCI
767 if (pci_early_dump_regs)
768 early_dump_pci_devices();
769 #endif
770
771 finish_e820_parsing();
772
773 if (efi_enabled)
774 efi_init();
775
776 dmi_scan_machine();
777
778 dmi_check_system(bad_bios_dmi_table);
779
780 /*
781 * VMware detection requires dmi to be available, so this
782 * needs to be done after dmi_scan_machine, for the BP.
783 */
784 init_hypervisor(&boot_cpu_data);
785
786 #ifdef CONFIG_X86_32
787 probe_roms();
788 #endif
789
790 /* after parse_early_param, so could debug it */
791 insert_resource(&iomem_resource, &code_resource);
792 insert_resource(&iomem_resource, &data_resource);
793 insert_resource(&iomem_resource, &bss_resource);
794
795
796 #ifdef CONFIG_X86_32
797 if (ppro_with_ram_bug()) {
798 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
799 E820_RESERVED);
800 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
801 printk(KERN_INFO "fixed physical RAM map:\n");
802 e820_print_map("bad_ppro");
803 }
804 #else
805 early_gart_iommu_check();
806 #endif
807
808 /*
809 * partially used pages are not usable - thus
810 * we are rounding upwards:
811 */
812 max_pfn = e820_end_of_ram_pfn();
813
814 /* preallocate 4k for mptable mpc */
815 early_reserve_e820_mpc_new();
816 /* update e820 for memory not covered by WB MTRRs */
817 mtrr_bp_init();
818 if (mtrr_trim_uncached_memory(max_pfn))
819 max_pfn = e820_end_of_ram_pfn();
820
821 #ifdef CONFIG_X86_32
822 /* max_low_pfn get updated here */
823 find_low_pfn_range();
824 #else
825 num_physpages = max_pfn;
826
827 if (cpu_has_x2apic)
828 check_x2apic();
829
830 /* How many end-of-memory variables you have, grandma! */
831 /* need this before calling reserve_initrd */
832 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
833 max_low_pfn = e820_end_of_low_ram_pfn();
834 else
835 max_low_pfn = max_pfn;
836
837 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
838 #endif
839
840 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
841 setup_bios_corruption_check();
842 #endif
843
844 /* max_pfn_mapped is updated here */
845 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
846 max_pfn_mapped = max_low_pfn_mapped;
847
848 #ifdef CONFIG_X86_64
849 if (max_pfn > max_low_pfn) {
850 max_pfn_mapped = init_memory_mapping(1UL<<32,
851 max_pfn<<PAGE_SHIFT);
852 /* can we preseve max_low_pfn ?*/
853 max_low_pfn = max_pfn;
854 }
855 #endif
856
857 /*
858 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
859 */
860
861 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
862 if (init_ohci1394_dma_early)
863 init_ohci1394_dma_on_all_controllers();
864 #endif
865
866 reserve_initrd();
867
868 #ifdef CONFIG_X86_64
869 vsmp_init();
870 #endif
871
872 io_delay_init();
873
874 /*
875 * Parse the ACPI tables for possible boot-time SMP configuration.
876 */
877 acpi_boot_table_init();
878
879 early_acpi_boot_init();
880
881 #ifdef CONFIG_ACPI_NUMA
882 /*
883 * Parse SRAT to discover nodes.
884 */
885 acpi_numa_init();
886 #endif
887
888 initmem_init(0, max_pfn);
889
890 #ifdef CONFIG_ACPI_SLEEP
891 /*
892 * Reserve low memory region for sleep support.
893 */
894 acpi_reserve_bootmem();
895 #endif
896 #ifdef CONFIG_X86_FIND_SMP_CONFIG
897 /*
898 * Find and reserve possible boot-time SMP configuration:
899 */
900 find_smp_config();
901 #endif
902 reserve_crashkernel();
903
904 #ifdef CONFIG_X86_64
905 /*
906 * dma32_reserve_bootmem() allocates bootmem which may conflict
907 * with the crashkernel command line, so do that after
908 * reserve_crashkernel()
909 */
910 dma32_reserve_bootmem();
911 #endif
912
913 reserve_ibft_region();
914
915 #ifdef CONFIG_KVM_CLOCK
916 kvmclock_init();
917 #endif
918
919 paravirt_pagetable_setup_start(swapper_pg_dir);
920 paging_init();
921 paravirt_pagetable_setup_done(swapper_pg_dir);
922 paravirt_post_allocator_init();
923
924 #ifdef CONFIG_X86_64
925 map_vsyscall();
926 #endif
927
928 #ifdef CONFIG_X86_GENERICARCH
929 generic_apic_probe();
930 #endif
931
932 early_quirks();
933
934 /*
935 * Read APIC and some other early information from ACPI tables.
936 */
937 acpi_boot_init();
938
939 #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
940 /*
941 * get boot-time SMP configuration:
942 */
943 if (smp_found_config)
944 get_smp_config();
945 #endif
946
947 prefill_possible_map();
948
949 #ifdef CONFIG_X86_64
950 init_cpu_to_node();
951 #endif
952
953 init_apic_mappings();
954 ioapic_init_mappings();
955
956 /* need to wait for io_apic is mapped */
957 probe_nr_irqs_gsi();
958
959 kvm_guest_init();
960
961 e820_reserve_resources();
962 e820_mark_nosave_regions(max_low_pfn);
963
964 #ifdef CONFIG_X86_32
965 request_resource(&iomem_resource, &video_ram_resource);
966 #endif
967 reserve_standard_io_resources();
968
969 e820_setup_gap();
970
971 #ifdef CONFIG_VT
972 #if defined(CONFIG_VGA_CONSOLE)
973 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
974 conswitchp = &vga_con;
975 #elif defined(CONFIG_DUMMY_CONSOLE)
976 conswitchp = &dummy_con;
977 #endif
978 #endif
979 }
980
981
982