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 #include <asm/mce.h>
111
112 #ifndef ARCH_SETUP
113 #define ARCH_SETUP
114 #endif
115
116 /*
117 * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
118 * The direct mapping extends to max_pfn_mapped, so that we can directly access
119 * apertures, ACPI and other tables without having to play with fixmaps.
120 */
121 unsigned long max_low_pfn_mapped;
122 unsigned long max_pfn_mapped;
123
124 RESERVE_BRK(dmi_alloc, 65536);
125
126 unsigned int boot_cpu_id __read_mostly;
127
128 static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
129 unsigned long _brk_end = (unsigned long)__brk_base;
130
131 #ifdef CONFIG_X86_64
132 int default_cpu_present_to_apicid(int mps_cpu)
133 {
134 return __default_cpu_present_to_apicid(mps_cpu);
135 }
136
137 int default_check_phys_apicid_present(int boot_cpu_physical_apicid)
138 {
139 return __default_check_phys_apicid_present(boot_cpu_physical_apicid);
140 }
141 #endif
142
143 #ifndef CONFIG_DEBUG_BOOT_PARAMS
144 struct boot_params __initdata boot_params;
145 #else
146 struct boot_params boot_params;
147 #endif
148
149 /*
150 * Machine setup..
151 */
152 static struct resource data_resource = {
153 .name = "Kernel data",
154 .start = 0,
155 .end = 0,
156 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
157 };
158
159 static struct resource code_resource = {
160 .name = "Kernel code",
161 .start = 0,
162 .end = 0,
163 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
164 };
165
166 static struct resource bss_resource = {
167 .name = "Kernel bss",
168 .start = 0,
169 .end = 0,
170 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
171 };
172
173
174 #ifdef CONFIG_X86_32
175 static struct resource video_ram_resource = {
176 .name = "Video RAM area",
177 .start = 0xa0000,
178 .end = 0xbffff,
179 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
180 };
181
182 /* cpu data as detected by the assembly code in head.S */
183 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1};
184 /* common cpu data for all cpus */
185 struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1};
186 EXPORT_SYMBOL(boot_cpu_data);
187 static void set_mca_bus(int x)
188 {
189 #ifdef CONFIG_MCA
190 MCA_bus = x;
191 #endif
192 }
193
194 unsigned int def_to_bigsmp;
195
196 /* for MCA, but anyone else can use it if they want */
197 unsigned int machine_id;
198 unsigned int machine_submodel_id;
199 unsigned int BIOS_revision;
200
201 struct apm_info apm_info;
202 EXPORT_SYMBOL(apm_info);
203
204 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
205 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
206 struct ist_info ist_info;
207 EXPORT_SYMBOL(ist_info);
208 #else
209 struct ist_info ist_info;
210 #endif
211
212 #else
213 struct cpuinfo_x86 boot_cpu_data __read_mostly = {
214 .x86_phys_bits = MAX_PHYSMEM_BITS,
215 };
216 EXPORT_SYMBOL(boot_cpu_data);
217 #endif
218
219
220 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
221 unsigned long mmu_cr4_features;
222 #else
223 unsigned long mmu_cr4_features = X86_CR4_PAE;
224 #endif
225
226 /* Boot loader ID and version as integers, for the benefit of proc_dointvec */
227 int bootloader_type, bootloader_version;
228
229 /*
230 * Setup options
231 */
232 struct screen_info screen_info;
233 EXPORT_SYMBOL(screen_info);
234 struct edid_info edid_info;
235 EXPORT_SYMBOL_GPL(edid_info);
236
237 extern int root_mountflags;
238
239 unsigned long saved_video_mode;
240
241 #define RAMDISK_IMAGE_START_MASK 0x07FF
242 #define RAMDISK_PROMPT_FLAG 0x8000
243 #define RAMDISK_LOAD_FLAG 0x4000
244
245 static char __initdata command_line[COMMAND_LINE_SIZE];
246 #ifdef CONFIG_CMDLINE_BOOL
247 static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
248 #endif
249
250 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
251 struct edd edd;
252 #ifdef CONFIG_EDD_MODULE
253 EXPORT_SYMBOL(edd);
254 #endif
255 /**
256 * copy_edd() - Copy the BIOS EDD information
257 * from boot_params into a safe place.
258 *
259 */
260 static inline void copy_edd(void)
261 {
262 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
263 sizeof(edd.mbr_signature));
264 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
265 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
266 edd.edd_info_nr = boot_params.eddbuf_entries;
267 }
268 #else
269 static inline void copy_edd(void)
270 {
271 }
272 #endif
273
274 void * __init extend_brk(size_t size, size_t align)
275 {
276 size_t mask = align - 1;
277 void *ret;
278
279 BUG_ON(_brk_start == 0);
280 BUG_ON(align & mask);
281
282 _brk_end = (_brk_end + mask) & ~mask;
283 BUG_ON((char *)(_brk_end + size) > __brk_limit);
284
285 ret = (void *)_brk_end;
286 _brk_end += size;
287
288 memset(ret, 0, size);
289
290 return ret;
291 }
292
293 #ifdef CONFIG_X86_64
294 static void __init init_gbpages(void)
295 {
296 if (direct_gbpages && cpu_has_gbpages)
297 printk(KERN_INFO "Using GB pages for direct mapping\n");
298 else
299 direct_gbpages = 0;
300 }
301 #else
302 static inline void init_gbpages(void)
303 {
304 }
305 #endif
306
307 static void __init reserve_brk(void)
308 {
309 if (_brk_end > _brk_start)
310 reserve_early(__pa(_brk_start), __pa(_brk_end), "BRK");
311
312 /* Mark brk area as locked down and no longer taking any
313 new allocations */
314 _brk_start = 0;
315 }
316
317 #ifdef CONFIG_BLK_DEV_INITRD
318
319 #define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
320 static void __init relocate_initrd(void)
321 {
322
323 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
324 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
325 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
326 u64 ramdisk_here;
327 unsigned long slop, clen, mapaddr;
328 char *p, *q;
329
330 /* We need to move the initrd down into lowmem */
331 ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size,
332 PAGE_SIZE);
333
334 if (ramdisk_here == -1ULL)
335 panic("Cannot find place for new RAMDISK of size %lld\n",
336 ramdisk_size);
337
338 /* Note: this includes all the lowmem currently occupied by
339 the initrd, we rely on that fact to keep the data intact. */
340 reserve_early(ramdisk_here, ramdisk_here + ramdisk_size,
341 "NEW RAMDISK");
342 initrd_start = ramdisk_here + PAGE_OFFSET;
343 initrd_end = initrd_start + ramdisk_size;
344 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n",
345 ramdisk_here, ramdisk_here + ramdisk_size);
346
347 q = (char *)initrd_start;
348
349 /* Copy any lowmem portion of the initrd */
350 if (ramdisk_image < end_of_lowmem) {
351 clen = end_of_lowmem - ramdisk_image;
352 p = (char *)__va(ramdisk_image);
353 memcpy(q, p, clen);
354 q += clen;
355 ramdisk_image += clen;
356 ramdisk_size -= clen;
357 }
358
359 /* Copy the highmem portion of the initrd */
360 while (ramdisk_size) {
361 slop = ramdisk_image & ~PAGE_MASK;
362 clen = ramdisk_size;
363 if (clen > MAX_MAP_CHUNK-slop)
364 clen = MAX_MAP_CHUNK-slop;
365 mapaddr = ramdisk_image & PAGE_MASK;
366 p = early_memremap(mapaddr, clen+slop);
367 memcpy(q, p+slop, clen);
368 early_iounmap(p, clen+slop);
369 q += clen;
370 ramdisk_image += clen;
371 ramdisk_size -= clen;
372 }
373 /* high pages is not converted by early_res_to_bootmem */
374 ramdisk_image = boot_params.hdr.ramdisk_image;
375 ramdisk_size = boot_params.hdr.ramdisk_size;
376 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to"
377 " %08llx - %08llx\n",
378 ramdisk_image, ramdisk_image + ramdisk_size - 1,
379 ramdisk_here, ramdisk_here + ramdisk_size - 1);
380 }
381
382 static void __init reserve_initrd(void)
383 {
384 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
385 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
386 u64 ramdisk_end = ramdisk_image + ramdisk_size;
387 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
388
389 if (!boot_params.hdr.type_of_loader ||
390 !ramdisk_image || !ramdisk_size)
391 return; /* No initrd provided by bootloader */
392
393 initrd_start = 0;
394
395 if (ramdisk_size >= (end_of_lowmem>>1)) {
396 free_early(ramdisk_image, ramdisk_end);
397 printk(KERN_ERR "initrd too large to handle, "
398 "disabling initrd\n");
399 return;
400 }
401
402 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image,
403 ramdisk_end);
404
405
406 if (ramdisk_end <= end_of_lowmem) {
407 /* All in lowmem, easy case */
408 /*
409 * don't need to reserve again, already reserved early
410 * in i386_start_kernel
411 */
412 initrd_start = ramdisk_image + PAGE_OFFSET;
413 initrd_end = initrd_start + ramdisk_size;
414 return;
415 }
416
417 relocate_initrd();
418
419 free_early(ramdisk_image, ramdisk_end);
420 }
421 #else
422 static void __init reserve_initrd(void)
423 {
424 }
425 #endif /* CONFIG_BLK_DEV_INITRD */
426
427 static void __init parse_setup_data(void)
428 {
429 struct setup_data *data;
430 u64 pa_data;
431
432 if (boot_params.hdr.version < 0x0209)
433 return;
434 pa_data = boot_params.hdr.setup_data;
435 while (pa_data) {
436 data = early_memremap(pa_data, PAGE_SIZE);
437 switch (data->type) {
438 case SETUP_E820_EXT:
439 parse_e820_ext(data, pa_data);
440 break;
441 default:
442 break;
443 }
444 pa_data = data->next;
445 early_iounmap(data, PAGE_SIZE);
446 }
447 }
448
449 static void __init e820_reserve_setup_data(void)
450 {
451 struct setup_data *data;
452 u64 pa_data;
453 int found = 0;
454
455 if (boot_params.hdr.version < 0x0209)
456 return;
457 pa_data = boot_params.hdr.setup_data;
458 while (pa_data) {
459 data = early_memremap(pa_data, sizeof(*data));
460 e820_update_range(pa_data, sizeof(*data)+data->len,
461 E820_RAM, E820_RESERVED_KERN);
462 found = 1;
463 pa_data = data->next;
464 early_iounmap(data, sizeof(*data));
465 }
466 if (!found)
467 return;
468
469 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
470 memcpy(&e820_saved, &e820, sizeof(struct e820map));
471 printk(KERN_INFO "extended physical RAM map:\n");
472 e820_print_map("reserve setup_data");
473 }
474
475 static void __init reserve_early_setup_data(void)
476 {
477 struct setup_data *data;
478 u64 pa_data;
479 char buf[32];
480
481 if (boot_params.hdr.version < 0x0209)
482 return;
483 pa_data = boot_params.hdr.setup_data;
484 while (pa_data) {
485 data = early_memremap(pa_data, sizeof(*data));
486 sprintf(buf, "setup data %x", data->type);
487 reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
488 pa_data = data->next;
489 early_iounmap(data, sizeof(*data));
490 }
491 }
492
493 /*
494 * --------- Crashkernel reservation ------------------------------
495 */
496
497 #ifdef CONFIG_KEXEC
498
499 /**
500 * Reserve @size bytes of crashkernel memory at any suitable offset.
501 *
502 * @size: Size of the crashkernel memory to reserve.
503 * Returns the base address on success, and -1ULL on failure.
504 */
505 static
506 unsigned long long __init find_and_reserve_crashkernel(unsigned long long size)
507 {
508 const unsigned long long alignment = 16<<20; /* 16M */
509 unsigned long long start = 0LL;
510
511 while (1) {
512 int ret;
513
514 start = find_e820_area(start, ULONG_MAX, size, alignment);
515 if (start == -1ULL)
516 return start;
517
518 /* try to reserve it */
519 ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE);
520 if (ret >= 0)
521 return start;
522
523 start += alignment;
524 }
525 }
526
527 static inline unsigned long long get_total_mem(void)
528 {
529 unsigned long long total;
530
531 total = max_low_pfn - min_low_pfn;
532 #ifdef CONFIG_HIGHMEM
533 total += highend_pfn - highstart_pfn;
534 #endif
535
536 return total << PAGE_SHIFT;
537 }
538
539 static void __init reserve_crashkernel(void)
540 {
541 unsigned long long total_mem;
542 unsigned long long crash_size, crash_base;
543 int ret;
544
545 total_mem = get_total_mem();
546
547 ret = parse_crashkernel(boot_command_line, total_mem,
548 &crash_size, &crash_base);
549 if (ret != 0 || crash_size <= 0)
550 return;
551
552 /* 0 means: find the address automatically */
553 if (crash_base <= 0) {
554 crash_base = find_and_reserve_crashkernel(crash_size);
555 if (crash_base == -1ULL) {
556 pr_info("crashkernel reservation failed. "
557 "No suitable area found.\n");
558 return;
559 }
560 } else {
561 ret = reserve_bootmem_generic(crash_base, crash_size,
562 BOOTMEM_EXCLUSIVE);
563 if (ret < 0) {
564 pr_info("crashkernel reservation failed - "
565 "memory is in use\n");
566 return;
567 }
568 }
569
570 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
571 "for crashkernel (System RAM: %ldMB)\n",
572 (unsigned long)(crash_size >> 20),
573 (unsigned long)(crash_base >> 20),
574 (unsigned long)(total_mem >> 20));
575
576 crashk_res.start = crash_base;
577 crashk_res.end = crash_base + crash_size - 1;
578 insert_resource(&iomem_resource, &crashk_res);
579 }
580 #else
581 static void __init reserve_crashkernel(void)
582 {
583 }
584 #endif
585
586 static struct resource standard_io_resources[] = {
587 { .name = "dma1", .start = 0x00, .end = 0x1f,
588 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
589 { .name = "pic1", .start = 0x20, .end = 0x21,
590 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
591 { .name = "timer0", .start = 0x40, .end = 0x43,
592 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
593 { .name = "timer1", .start = 0x50, .end = 0x53,
594 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
595 { .name = "keyboard", .start = 0x60, .end = 0x60,
596 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
597 { .name = "keyboard", .start = 0x64, .end = 0x64,
598 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
599 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
600 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
601 { .name = "pic2", .start = 0xa0, .end = 0xa1,
602 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
603 { .name = "dma2", .start = 0xc0, .end = 0xdf,
604 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
605 { .name = "fpu", .start = 0xf0, .end = 0xff,
606 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
607 };
608
609 static void __init reserve_standard_io_resources(void)
610 {
611 int i;
612
613 /* request I/O space for devices used on all i[345]86 PCs */
614 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
615 request_resource(&ioport_resource, &standard_io_resources[i]);
616
617 }
618
619 /*
620 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
621 * is_kdump_kernel() to determine if we are booting after a panic. Hence
622 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
623 */
624
625 #ifdef CONFIG_CRASH_DUMP
626 /* elfcorehdr= specifies the location of elf core header
627 * stored by the crashed kernel. This option will be passed
628 * by kexec loader to the capture kernel.
629 */
630 static int __init setup_elfcorehdr(char *arg)
631 {
632 char *end;
633 if (!arg)
634 return -EINVAL;
635 elfcorehdr_addr = memparse(arg, &end);
636 return end > arg ? 0 : -EINVAL;
637 }
638 early_param("elfcorehdr", setup_elfcorehdr);
639 #endif
640
641 static struct x86_quirks default_x86_quirks __initdata;
642
643 struct x86_quirks *x86_quirks __initdata = &default_x86_quirks;
644
645 #ifdef CONFIG_X86_RESERVE_LOW_64K
646 static int __init dmi_low_memory_corruption(const struct dmi_system_id *d)
647 {
648 printk(KERN_NOTICE
649 "%s detected: BIOS may corrupt low RAM, working around it.\n",
650 d->ident);
651
652 e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED);
653 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
654
655 return 0;
656 }
657 #endif
658
659 /* List of systems that have known low memory corruption BIOS problems */
660 static struct dmi_system_id __initdata bad_bios_dmi_table[] = {
661 #ifdef CONFIG_X86_RESERVE_LOW_64K
662 {
663 .callback = dmi_low_memory_corruption,
664 .ident = "AMI BIOS",
665 .matches = {
666 DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
667 },
668 },
669 {
670 .callback = dmi_low_memory_corruption,
671 .ident = "Phoenix BIOS",
672 .matches = {
673 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"),
674 },
675 },
676 {
677 /*
678 * AMI BIOS with low memory corruption was found on Intel DG45ID board.
679 * It hase different DMI_BIOS_VENDOR = "Intel Corp.", for now we will
680 * match only DMI_BOARD_NAME and see if there is more bad products
681 * with this vendor.
682 */
683 .callback = dmi_low_memory_corruption,
684 .ident = "AMI BIOS",
685 .matches = {
686 DMI_MATCH(DMI_BOARD_NAME, "DG45ID"),
687 },
688 },
689 #endif
690 {}
691 };
692
693 /*
694 * Determine if we were loaded by an EFI loader. If so, then we have also been
695 * passed the efi memmap, systab, etc., so we should use these data structures
696 * for initialization. Note, the efi init code path is determined by the
697 * global efi_enabled. This allows the same kernel image to be used on existing
698 * systems (with a traditional BIOS) as well as on EFI systems.
699 */
700 /*
701 * setup_arch - architecture-specific boot-time initializations
702 *
703 * Note: On x86_64, fixmaps are ready for use even before this is called.
704 */
705
706 void __init setup_arch(char **cmdline_p)
707 {
708 #ifdef CONFIG_X86_32
709 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
710 visws_early_detect();
711 #else
712 printk(KERN_INFO "Command line: %s\n", boot_command_line);
713 #endif
714
715 /* VMI may relocate the fixmap; do this before touching ioremap area */
716 vmi_init();
717
718 early_cpu_init();
719 early_ioremap_init();
720
721 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
722 screen_info = boot_params.screen_info;
723 edid_info = boot_params.edid_info;
724 #ifdef CONFIG_X86_32
725 apm_info.bios = boot_params.apm_bios_info;
726 ist_info = boot_params.ist_info;
727 if (boot_params.sys_desc_table.length != 0) {
728 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
729 machine_id = boot_params.sys_desc_table.table[0];
730 machine_submodel_id = boot_params.sys_desc_table.table[1];
731 BIOS_revision = boot_params.sys_desc_table.table[2];
732 }
733 #endif
734 saved_video_mode = boot_params.hdr.vid_mode;
735 bootloader_type = boot_params.hdr.type_of_loader;
736 if ((bootloader_type >> 4) == 0xe) {
737 bootloader_type &= 0xf;
738 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
739 }
740 bootloader_version = bootloader_type & 0xf;
741 bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
742
743 #ifdef CONFIG_BLK_DEV_RAM
744 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
745 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
746 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
747 #endif
748 #ifdef CONFIG_EFI
749 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
750 #ifdef CONFIG_X86_32
751 "EL32",
752 #else
753 "EL64",
754 #endif
755 4)) {
756 efi_enabled = 1;
757 efi_reserve_early();
758 }
759 #endif
760
761 ARCH_SETUP
762
763 setup_memory_map();
764 parse_setup_data();
765 /* update the e820_saved too */
766 e820_reserve_setup_data();
767
768 copy_edd();
769
770 if (!boot_params.hdr.root_flags)
771 root_mountflags &= ~MS_RDONLY;
772 init_mm.start_code = (unsigned long) _text;
773 init_mm.end_code = (unsigned long) _etext;
774 init_mm.end_data = (unsigned long) _edata;
775 init_mm.brk = _brk_end;
776
777 code_resource.start = virt_to_phys(_text);
778 code_resource.end = virt_to_phys(_etext)-1;
779 data_resource.start = virt_to_phys(_etext);
780 data_resource.end = virt_to_phys(_edata)-1;
781 bss_resource.start = virt_to_phys(&__bss_start);
782 bss_resource.end = virt_to_phys(&__bss_stop)-1;
783
784 #ifdef CONFIG_CMDLINE_BOOL
785 #ifdef CONFIG_CMDLINE_OVERRIDE
786 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
787 #else
788 if (builtin_cmdline[0]) {
789 /* append boot loader cmdline to builtin */
790 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
791 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
792 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
793 }
794 #endif
795 #endif
796
797 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
798 *cmdline_p = command_line;
799
800 parse_early_param();
801
802 #ifdef CONFIG_X86_64
803 check_efer();
804 #endif
805
806 /* Must be before kernel pagetables are setup */
807 vmi_activate();
808
809 /* after early param, so could get panic from serial */
810 reserve_early_setup_data();
811
812 if (acpi_mps_check()) {
813 #ifdef CONFIG_X86_LOCAL_APIC
814 disable_apic = 1;
815 #endif
816 setup_clear_cpu_cap(X86_FEATURE_APIC);
817 }
818
819 #ifdef CONFIG_PCI
820 if (pci_early_dump_regs)
821 early_dump_pci_devices();
822 #endif
823
824 finish_e820_parsing();
825
826 if (efi_enabled)
827 efi_init();
828
829 dmi_scan_machine();
830
831 dmi_check_system(bad_bios_dmi_table);
832
833 /*
834 * VMware detection requires dmi to be available, so this
835 * needs to be done after dmi_scan_machine, for the BP.
836 */
837 init_hypervisor(&boot_cpu_data);
838
839 #ifdef CONFIG_X86_32
840 probe_roms();
841 #endif
842
843 /* after parse_early_param, so could debug it */
844 insert_resource(&iomem_resource, &code_resource);
845 insert_resource(&iomem_resource, &data_resource);
846 insert_resource(&iomem_resource, &bss_resource);
847
848
849 #ifdef CONFIG_X86_32
850 if (ppro_with_ram_bug()) {
851 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
852 E820_RESERVED);
853 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
854 printk(KERN_INFO "fixed physical RAM map:\n");
855 e820_print_map("bad_ppro");
856 }
857 #else
858 early_gart_iommu_check();
859 #endif
860
861 /*
862 * partially used pages are not usable - thus
863 * we are rounding upwards:
864 */
865 max_pfn = e820_end_of_ram_pfn();
866
867 /* preallocate 4k for mptable mpc */
868 early_reserve_e820_mpc_new();
869 /* update e820 for memory not covered by WB MTRRs */
870 mtrr_bp_init();
871 if (mtrr_trim_uncached_memory(max_pfn))
872 max_pfn = e820_end_of_ram_pfn();
873
874 #ifdef CONFIG_X86_32
875 /* max_low_pfn get updated here */
876 find_low_pfn_range();
877 #else
878 num_physpages = max_pfn;
879
880 check_x2apic();
881
882 /* How many end-of-memory variables you have, grandma! */
883 /* need this before calling reserve_initrd */
884 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
885 max_low_pfn = e820_end_of_low_ram_pfn();
886 else
887 max_low_pfn = max_pfn;
888
889 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
890 max_pfn_mapped = KERNEL_IMAGE_SIZE >> PAGE_SHIFT;
891 #endif
892
893 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
894 setup_bios_corruption_check();
895 #endif
896
897 printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n",
898 max_pfn_mapped<<PAGE_SHIFT);
899
900 reserve_brk();
901
902 init_gbpages();
903
904 /* max_pfn_mapped is updated here */
905 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
906 max_pfn_mapped = max_low_pfn_mapped;
907
908 #ifdef CONFIG_X86_64
909 if (max_pfn > max_low_pfn) {
910 max_pfn_mapped = init_memory_mapping(1UL<<32,
911 max_pfn<<PAGE_SHIFT);
912 /* can we preseve max_low_pfn ?*/
913 max_low_pfn = max_pfn;
914 }
915 #endif
916
917 /*
918 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
919 */
920
921 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
922 if (init_ohci1394_dma_early)
923 init_ohci1394_dma_on_all_controllers();
924 #endif
925
926 reserve_initrd();
927
928 vsmp_init();
929
930 io_delay_init();
931
932 /*
933 * Parse the ACPI tables for possible boot-time SMP configuration.
934 */
935 acpi_boot_table_init();
936
937 early_acpi_boot_init();
938
939 #ifdef CONFIG_ACPI_NUMA
940 /*
941 * Parse SRAT to discover nodes.
942 */
943 acpi_numa_init();
944 #endif
945
946 initmem_init(0, max_pfn);
947
948 #ifdef CONFIG_ACPI_SLEEP
949 /*
950 * Reserve low memory region for sleep support.
951 */
952 acpi_reserve_bootmem();
953 #endif
954 /*
955 * Find and reserve possible boot-time SMP configuration:
956 */
957 find_smp_config();
958
959 reserve_crashkernel();
960
961 #ifdef CONFIG_X86_64
962 /*
963 * dma32_reserve_bootmem() allocates bootmem which may conflict
964 * with the crashkernel command line, so do that after
965 * reserve_crashkernel()
966 */
967 dma32_reserve_bootmem();
968 #endif
969
970 reserve_ibft_region();
971
972 #ifdef CONFIG_KVM_CLOCK
973 kvmclock_init();
974 #endif
975
976 paravirt_pagetable_setup_start(swapper_pg_dir);
977 paging_init();
978 paravirt_pagetable_setup_done(swapper_pg_dir);
979 paravirt_post_allocator_init();
980
981 #ifdef CONFIG_X86_64
982 map_vsyscall();
983 #endif
984
985 generic_apic_probe();
986
987 early_quirks();
988
989 /*
990 * Read APIC and some other early information from ACPI tables.
991 */
992 acpi_boot_init();
993
994 #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
995 /*
996 * get boot-time SMP configuration:
997 */
998 if (smp_found_config)
999 get_smp_config();
1000 #endif
1001
1002 prefill_possible_map();
1003
1004 #ifdef CONFIG_X86_64
1005 init_cpu_to_node();
1006 #endif
1007
1008 init_apic_mappings();
1009 ioapic_init_mappings();
1010
1011 /* need to wait for io_apic is mapped */
1012 probe_nr_irqs_gsi();
1013
1014 kvm_guest_init();
1015
1016 e820_reserve_resources();
1017 e820_mark_nosave_regions(max_low_pfn);
1018
1019 #ifdef CONFIG_X86_32
1020 request_resource(&iomem_resource, &video_ram_resource);
1021 #endif
1022 reserve_standard_io_resources();
1023
1024 e820_setup_gap();
1025
1026 #ifdef CONFIG_VT
1027 #if defined(CONFIG_VGA_CONSOLE)
1028 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1029 conswitchp = &vga_con;
1030 #elif defined(CONFIG_DUMMY_CONSOLE)
1031 conswitchp = &dummy_con;
1032 #endif
1033 #endif
1034
1035 mcheck_intel_therm_init();
1036 }
1037
1038 #ifdef CONFIG_X86_32
1039
1040 /**
1041 * x86_quirk_intr_init - post gate setup interrupt initialisation
1042 *
1043 * Description:
1044 * Fill in any interrupts that may have been left out by the general
1045 * init_IRQ() routine. interrupts having to do with the machine rather
1046 * than the devices on the I/O bus (like APIC interrupts in intel MP
1047 * systems) are started here.
1048 **/
1049 void __init x86_quirk_intr_init(void)
1050 {
1051 if (x86_quirks->arch_intr_init) {
1052 if (x86_quirks->arch_intr_init())
1053 return;
1054 }
1055 }
1056
1057 /**
1058 * x86_quirk_trap_init - initialise system specific traps
1059 *
1060 * Description:
1061 * Called as the final act of trap_init(). Used in VISWS to initialise
1062 * the various board specific APIC traps.
1063 **/
1064 void __init x86_quirk_trap_init(void)
1065 {
1066 if (x86_quirks->arch_trap_init) {
1067 if (x86_quirks->arch_trap_init())
1068 return;
1069 }
1070 }
1071
1072 static struct irqaction irq0 = {
1073 .handler = timer_interrupt,
1074 .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER,
1075 .name = "timer"
1076 };
1077
1078 /**
1079 * x86_quirk_pre_time_init - do any specific initialisations before.
1080 *
1081 **/
1082 void __init x86_quirk_pre_time_init(void)
1083 {
1084 if (x86_quirks->arch_pre_time_init)
1085 x86_quirks->arch_pre_time_init();
1086 }
1087
1088 /**
1089 * x86_quirk_time_init - do any specific initialisations for the system timer.
1090 *
1091 * Description:
1092 * Must plug the system timer interrupt source at HZ into the IRQ listed
1093 * in irq_vectors.h:TIMER_IRQ
1094 **/
1095 void __init x86_quirk_time_init(void)
1096 {
1097 if (x86_quirks->arch_time_init) {
1098 /*
1099 * A nonzero return code does not mean failure, it means
1100 * that the architecture quirk does not want any
1101 * generic (timer) setup to be performed after this:
1102 */
1103 if (x86_quirks->arch_time_init())
1104 return;
1105 }
1106
1107 irq0.mask = cpumask_of_cpu(0);
1108 setup_irq(0, &irq0);
1109 }
1110 #endif /* CONFIG_X86_32 */
1111
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