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memblock, x86: Replace memblock_x86_reserve/free_range() with generic ones
[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/sfi.h>
31 #include <linux/apm_bios.h>
32 #include <linux/initrd.h>
33 #include <linux/bootmem.h>
34 #include <linux/memblock.h>
35 #include <linux/seq_file.h>
36 #include <linux/console.h>
37 #include <linux/mca.h>
38 #include <linux/root_dev.h>
39 #include <linux/highmem.h>
40 #include <linux/module.h>
41 #include <linux/efi.h>
42 #include <linux/init.h>
43 #include <linux/edd.h>
44 #include <linux/iscsi_ibft.h>
45 #include <linux/nodemask.h>
46 #include <linux/kexec.h>
47 #include <linux/dmi.h>
48 #include <linux/pfn.h>
49 #include <linux/pci.h>
50 #include <asm/pci-direct.h>
51 #include <linux/init_ohci1394_dma.h>
52 #include <linux/kvm_para.h>
53
54 #include <linux/errno.h>
55 #include <linux/kernel.h>
56 #include <linux/stddef.h>
57 #include <linux/unistd.h>
58 #include <linux/ptrace.h>
59 #include <linux/user.h>
60 #include <linux/delay.h>
61
62 #include <linux/kallsyms.h>
63 #include <linux/cpufreq.h>
64 #include <linux/dma-mapping.h>
65 #include <linux/ctype.h>
66 #include <linux/uaccess.h>
67
68 #include <linux/percpu.h>
69 #include <linux/crash_dump.h>
70 #include <linux/tboot.h>
71
72 #include <video/edid.h>
73
74 #include <asm/mtrr.h>
75 #include <asm/apic.h>
76 #include <asm/trampoline.h>
77 #include <asm/e820.h>
78 #include <asm/mpspec.h>
79 #include <asm/setup.h>
80 #include <asm/efi.h>
81 #include <asm/timer.h>
82 #include <asm/i8259.h>
83 #include <asm/sections.h>
84 #include <asm/dmi.h>
85 #include <asm/io_apic.h>
86 #include <asm/ist.h>
87 #include <asm/setup_arch.h>
88 #include <asm/bios_ebda.h>
89 #include <asm/cacheflush.h>
90 #include <asm/processor.h>
91 #include <asm/bugs.h>
92
93 #include <asm/system.h>
94 #include <asm/vsyscall.h>
95 #include <asm/cpu.h>
96 #include <asm/desc.h>
97 #include <asm/dma.h>
98 #include <asm/iommu.h>
99 #include <asm/gart.h>
100 #include <asm/mmu_context.h>
101 #include <asm/proto.h>
102
103 #include <asm/paravirt.h>
104 #include <asm/hypervisor.h>
105 #include <asm/olpc_ofw.h>
106
107 #include <asm/percpu.h>
108 #include <asm/topology.h>
109 #include <asm/apicdef.h>
110 #include <asm/amd_nb.h>
111 #ifdef CONFIG_X86_64
112 #include <asm/numa_64.h>
113 #endif
114 #include <asm/mce.h>
115 #include <asm/alternative.h>
116 #include <asm/prom.h>
117
118 /*
119 * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
120 * The direct mapping extends to max_pfn_mapped, so that we can directly access
121 * apertures, ACPI and other tables without having to play with fixmaps.
122 */
123 unsigned long max_low_pfn_mapped;
124 unsigned long max_pfn_mapped;
125
126 #ifdef CONFIG_DMI
127 RESERVE_BRK(dmi_alloc, 65536);
128 #endif
129
130
131 static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
132 unsigned long _brk_end = (unsigned long)__brk_base;
133
134 #ifdef CONFIG_X86_64
135 int default_cpu_present_to_apicid(int mps_cpu)
136 {
137 return __default_cpu_present_to_apicid(mps_cpu);
138 }
139
140 int default_check_phys_apicid_present(int phys_apicid)
141 {
142 return __default_check_phys_apicid_present(phys_apicid);
143 }
144 #endif
145
146 #ifndef CONFIG_DEBUG_BOOT_PARAMS
147 struct boot_params __initdata boot_params;
148 #else
149 struct boot_params boot_params;
150 #endif
151
152 /*
153 * Machine setup..
154 */
155 static struct resource data_resource = {
156 .name = "Kernel data",
157 .start = 0,
158 .end = 0,
159 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
160 };
161
162 static struct resource code_resource = {
163 .name = "Kernel code",
164 .start = 0,
165 .end = 0,
166 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
167 };
168
169 static struct resource bss_resource = {
170 .name = "Kernel bss",
171 .start = 0,
172 .end = 0,
173 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
174 };
175
176
177 #ifdef CONFIG_X86_32
178 /* cpu data as detected by the assembly code in head.S */
179 struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1};
180 /* common cpu data for all cpus */
181 struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1};
182 EXPORT_SYMBOL(boot_cpu_data);
183 static void set_mca_bus(int x)
184 {
185 #ifdef CONFIG_MCA
186 MCA_bus = x;
187 #endif
188 }
189
190 unsigned int def_to_bigsmp;
191
192 /* for MCA, but anyone else can use it if they want */
193 unsigned int machine_id;
194 unsigned int machine_submodel_id;
195 unsigned int BIOS_revision;
196
197 struct apm_info apm_info;
198 EXPORT_SYMBOL(apm_info);
199
200 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
201 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
202 struct ist_info ist_info;
203 EXPORT_SYMBOL(ist_info);
204 #else
205 struct ist_info ist_info;
206 #endif
207
208 #else
209 struct cpuinfo_x86 boot_cpu_data __read_mostly = {
210 .x86_phys_bits = MAX_PHYSMEM_BITS,
211 };
212 EXPORT_SYMBOL(boot_cpu_data);
213 #endif
214
215
216 #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
217 unsigned long mmu_cr4_features;
218 #else
219 unsigned long mmu_cr4_features = X86_CR4_PAE;
220 #endif
221
222 /* Boot loader ID and version as integers, for the benefit of proc_dointvec */
223 int bootloader_type, bootloader_version;
224
225 /*
226 * Setup options
227 */
228 struct screen_info screen_info;
229 EXPORT_SYMBOL(screen_info);
230 struct edid_info edid_info;
231 EXPORT_SYMBOL_GPL(edid_info);
232
233 extern int root_mountflags;
234
235 unsigned long saved_video_mode;
236
237 #define RAMDISK_IMAGE_START_MASK 0x07FF
238 #define RAMDISK_PROMPT_FLAG 0x8000
239 #define RAMDISK_LOAD_FLAG 0x4000
240
241 static char __initdata command_line[COMMAND_LINE_SIZE];
242 #ifdef CONFIG_CMDLINE_BOOL
243 static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
244 #endif
245
246 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
247 struct edd edd;
248 #ifdef CONFIG_EDD_MODULE
249 EXPORT_SYMBOL(edd);
250 #endif
251 /**
252 * copy_edd() - Copy the BIOS EDD information
253 * from boot_params into a safe place.
254 *
255 */
256 static inline void __init copy_edd(void)
257 {
258 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
259 sizeof(edd.mbr_signature));
260 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
261 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
262 edd.edd_info_nr = boot_params.eddbuf_entries;
263 }
264 #else
265 static inline void __init copy_edd(void)
266 {
267 }
268 #endif
269
270 void * __init extend_brk(size_t size, size_t align)
271 {
272 size_t mask = align - 1;
273 void *ret;
274
275 BUG_ON(_brk_start == 0);
276 BUG_ON(align & mask);
277
278 _brk_end = (_brk_end + mask) & ~mask;
279 BUG_ON((char *)(_brk_end + size) > __brk_limit);
280
281 ret = (void *)_brk_end;
282 _brk_end += size;
283
284 memset(ret, 0, size);
285
286 return ret;
287 }
288
289 #ifdef CONFIG_X86_64
290 static void __init init_gbpages(void)
291 {
292 if (direct_gbpages && cpu_has_gbpages)
293 printk(KERN_INFO "Using GB pages for direct mapping\n");
294 else
295 direct_gbpages = 0;
296 }
297 #else
298 static inline void init_gbpages(void)
299 {
300 }
301 static void __init cleanup_highmap(void)
302 {
303 }
304 #endif
305
306 static void __init reserve_brk(void)
307 {
308 if (_brk_end > _brk_start)
309 memblock_reserve(__pa(_brk_start),
310 __pa(_brk_end) - __pa(_brk_start));
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 /* Assume only end is not page aligned */
323 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
324 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
325 u64 area_size = PAGE_ALIGN(ramdisk_size);
326 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
327 u64 ramdisk_here;
328 unsigned long slop, clen, mapaddr;
329 char *p, *q;
330
331 /* We need to move the initrd down into lowmem */
332 ramdisk_here = memblock_find_in_range(0, end_of_lowmem, area_size,
333 PAGE_SIZE);
334
335 if (!ramdisk_here)
336 panic("Cannot find place for new RAMDISK of size %lld\n",
337 ramdisk_size);
338
339 /* Note: this includes all the lowmem currently occupied by
340 the initrd, we rely on that fact to keep the data intact. */
341 memblock_reserve(ramdisk_here, area_size);
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 /* Assume only end is not page aligned */
385 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
386 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
387 u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
388 u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
389
390 if (!boot_params.hdr.type_of_loader ||
391 !ramdisk_image || !ramdisk_size)
392 return; /* No initrd provided by bootloader */
393
394 initrd_start = 0;
395
396 if (ramdisk_size >= (end_of_lowmem>>1)) {
397 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image);
398 printk(KERN_ERR "initrd too large to handle, "
399 "disabling initrd\n");
400 return;
401 }
402
403 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image,
404 ramdisk_end);
405
406
407 if (ramdisk_end <= end_of_lowmem) {
408 /* All in lowmem, easy case */
409 /*
410 * don't need to reserve again, already reserved early
411 * in i386_start_kernel
412 */
413 initrd_start = ramdisk_image + PAGE_OFFSET;
414 initrd_end = initrd_start + ramdisk_size;
415 return;
416 }
417
418 relocate_initrd();
419
420 memblock_free(ramdisk_image, ramdisk_end - ramdisk_image);
421 }
422 #else
423 static void __init reserve_initrd(void)
424 {
425 }
426 #endif /* CONFIG_BLK_DEV_INITRD */
427
428 static void __init parse_setup_data(void)
429 {
430 struct setup_data *data;
431 u64 pa_data;
432
433 if (boot_params.hdr.version < 0x0209)
434 return;
435 pa_data = boot_params.hdr.setup_data;
436 while (pa_data) {
437 u32 data_len, map_len;
438
439 map_len = max(PAGE_SIZE - (pa_data & ~PAGE_MASK),
440 (u64)sizeof(struct setup_data));
441 data = early_memremap(pa_data, map_len);
442 data_len = data->len + sizeof(struct setup_data);
443 if (data_len > map_len) {
444 early_iounmap(data, map_len);
445 data = early_memremap(pa_data, data_len);
446 map_len = data_len;
447 }
448
449 switch (data->type) {
450 case SETUP_E820_EXT:
451 parse_e820_ext(data);
452 break;
453 case SETUP_DTB:
454 add_dtb(pa_data);
455 break;
456 default:
457 break;
458 }
459 pa_data = data->next;
460 early_iounmap(data, map_len);
461 }
462 }
463
464 static void __init e820_reserve_setup_data(void)
465 {
466 struct setup_data *data;
467 u64 pa_data;
468 int found = 0;
469
470 if (boot_params.hdr.version < 0x0209)
471 return;
472 pa_data = boot_params.hdr.setup_data;
473 while (pa_data) {
474 data = early_memremap(pa_data, sizeof(*data));
475 e820_update_range(pa_data, sizeof(*data)+data->len,
476 E820_RAM, E820_RESERVED_KERN);
477 found = 1;
478 pa_data = data->next;
479 early_iounmap(data, sizeof(*data));
480 }
481 if (!found)
482 return;
483
484 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
485 memcpy(&e820_saved, &e820, sizeof(struct e820map));
486 printk(KERN_INFO "extended physical RAM map:\n");
487 e820_print_map("reserve setup_data");
488 }
489
490 static void __init memblock_x86_reserve_range_setup_data(void)
491 {
492 struct setup_data *data;
493 u64 pa_data;
494
495 if (boot_params.hdr.version < 0x0209)
496 return;
497 pa_data = boot_params.hdr.setup_data;
498 while (pa_data) {
499 data = early_memremap(pa_data, sizeof(*data));
500 memblock_reserve(pa_data, sizeof(*data) + data->len);
501 pa_data = data->next;
502 early_iounmap(data, sizeof(*data));
503 }
504 }
505
506 /*
507 * --------- Crashkernel reservation ------------------------------
508 */
509
510 #ifdef CONFIG_KEXEC
511
512 static inline unsigned long long get_total_mem(void)
513 {
514 unsigned long long total;
515
516 total = max_pfn - min_low_pfn;
517
518 return total << PAGE_SHIFT;
519 }
520
521 /*
522 * Keep the crash kernel below this limit. On 32 bits earlier kernels
523 * would limit the kernel to the low 512 MiB due to mapping restrictions.
524 * On 64 bits, kexec-tools currently limits us to 896 MiB; increase this
525 * limit once kexec-tools are fixed.
526 */
527 #ifdef CONFIG_X86_32
528 # define CRASH_KERNEL_ADDR_MAX (512 << 20)
529 #else
530 # define CRASH_KERNEL_ADDR_MAX (896 << 20)
531 #endif
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 const unsigned long long alignment = 16<<20; /* 16M */
549
550 /*
551 * kexec want bzImage is below CRASH_KERNEL_ADDR_MAX
552 */
553 crash_base = memblock_find_in_range(alignment,
554 CRASH_KERNEL_ADDR_MAX, crash_size, alignment);
555
556 if (!crash_base) {
557 pr_info("crashkernel reservation failed - No suitable area found.\n");
558 return;
559 }
560 } else {
561 unsigned long long start;
562
563 start = memblock_find_in_range(crash_base,
564 crash_base + crash_size, crash_size, 1<<20);
565 if (start != crash_base) {
566 pr_info("crashkernel reservation failed - memory is in use.\n");
567 return;
568 }
569 }
570 memblock_reserve(crash_base, crash_size);
571
572 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
573 "for crashkernel (System RAM: %ldMB)\n",
574 (unsigned long)(crash_size >> 20),
575 (unsigned long)(crash_base >> 20),
576 (unsigned long)(total_mem >> 20));
577
578 crashk_res.start = crash_base;
579 crashk_res.end = crash_base + crash_size - 1;
580 insert_resource(&iomem_resource, &crashk_res);
581 }
582 #else
583 static void __init reserve_crashkernel(void)
584 {
585 }
586 #endif
587
588 static struct resource standard_io_resources[] = {
589 { .name = "dma1", .start = 0x00, .end = 0x1f,
590 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
591 { .name = "pic1", .start = 0x20, .end = 0x21,
592 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
593 { .name = "timer0", .start = 0x40, .end = 0x43,
594 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
595 { .name = "timer1", .start = 0x50, .end = 0x53,
596 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
597 { .name = "keyboard", .start = 0x60, .end = 0x60,
598 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
599 { .name = "keyboard", .start = 0x64, .end = 0x64,
600 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
601 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
602 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
603 { .name = "pic2", .start = 0xa0, .end = 0xa1,
604 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
605 { .name = "dma2", .start = 0xc0, .end = 0xdf,
606 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
607 { .name = "fpu", .start = 0xf0, .end = 0xff,
608 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
609 };
610
611 void __init reserve_standard_io_resources(void)
612 {
613 int i;
614
615 /* request I/O space for devices used on all i[345]86 PCs */
616 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
617 request_resource(&ioport_resource, &standard_io_resources[i]);
618
619 }
620
621 static __init void reserve_ibft_region(void)
622 {
623 unsigned long addr, size = 0;
624
625 addr = find_ibft_region(&size);
626
627 if (size)
628 memblock_reserve(addr, size);
629 }
630
631 static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10;
632
633 static void __init trim_bios_range(void)
634 {
635 /*
636 * A special case is the first 4Kb of memory;
637 * This is a BIOS owned area, not kernel ram, but generally
638 * not listed as such in the E820 table.
639 *
640 * This typically reserves additional memory (64KiB by default)
641 * since some BIOSes are known to corrupt low memory. See the
642 * Kconfig help text for X86_RESERVE_LOW.
643 */
644 e820_update_range(0, ALIGN(reserve_low, PAGE_SIZE),
645 E820_RAM, E820_RESERVED);
646
647 /*
648 * special case: Some BIOSen report the PC BIOS
649 * area (640->1Mb) as ram even though it is not.
650 * take them out.
651 */
652 e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1);
653 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
654 }
655
656 static int __init parse_reservelow(char *p)
657 {
658 unsigned long long size;
659
660 if (!p)
661 return -EINVAL;
662
663 size = memparse(p, &p);
664
665 if (size < 4096)
666 size = 4096;
667
668 if (size > 640*1024)
669 size = 640*1024;
670
671 reserve_low = size;
672
673 return 0;
674 }
675
676 early_param("reservelow", parse_reservelow);
677
678 /*
679 * Determine if we were loaded by an EFI loader. If so, then we have also been
680 * passed the efi memmap, systab, etc., so we should use these data structures
681 * for initialization. Note, the efi init code path is determined by the
682 * global efi_enabled. This allows the same kernel image to be used on existing
683 * systems (with a traditional BIOS) as well as on EFI systems.
684 */
685 /*
686 * setup_arch - architecture-specific boot-time initializations
687 *
688 * Note: On x86_64, fixmaps are ready for use even before this is called.
689 */
690
691 void __init setup_arch(char **cmdline_p)
692 {
693 #ifdef CONFIG_X86_32
694 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
695 visws_early_detect();
696
697 /*
698 * copy kernel address range established so far and switch
699 * to the proper swapper page table
700 */
701 clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY,
702 initial_page_table + KERNEL_PGD_BOUNDARY,
703 KERNEL_PGD_PTRS);
704
705 load_cr3(swapper_pg_dir);
706 __flush_tlb_all();
707 #else
708 printk(KERN_INFO "Command line: %s\n", boot_command_line);
709 #endif
710
711 /*
712 * If we have OLPC OFW, we might end up relocating the fixmap due to
713 * reserve_top(), so do this before touching the ioremap area.
714 */
715 olpc_ofw_detect();
716
717 early_trap_init();
718 early_cpu_init();
719 early_ioremap_init();
720
721 setup_olpc_ofw_pgd();
722
723 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
724 screen_info = boot_params.screen_info;
725 edid_info = boot_params.edid_info;
726 #ifdef CONFIG_X86_32
727 apm_info.bios = boot_params.apm_bios_info;
728 ist_info = boot_params.ist_info;
729 if (boot_params.sys_desc_table.length != 0) {
730 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
731 machine_id = boot_params.sys_desc_table.table[0];
732 machine_submodel_id = boot_params.sys_desc_table.table[1];
733 BIOS_revision = boot_params.sys_desc_table.table[2];
734 }
735 #endif
736 saved_video_mode = boot_params.hdr.vid_mode;
737 bootloader_type = boot_params.hdr.type_of_loader;
738 if ((bootloader_type >> 4) == 0xe) {
739 bootloader_type &= 0xf;
740 bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4;
741 }
742 bootloader_version = bootloader_type & 0xf;
743 bootloader_version |= boot_params.hdr.ext_loader_ver << 4;
744
745 #ifdef CONFIG_BLK_DEV_RAM
746 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
747 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
748 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
749 #endif
750 #ifdef CONFIG_EFI
751 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
752 #ifdef CONFIG_X86_32
753 "EL32",
754 #else
755 "EL64",
756 #endif
757 4)) {
758 efi_enabled = 1;
759 efi_memblock_x86_reserve_range();
760 }
761 #endif
762
763 x86_init.oem.arch_setup();
764
765 iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
766 setup_memory_map();
767 parse_setup_data();
768 /* update the e820_saved too */
769 e820_reserve_setup_data();
770
771 copy_edd();
772
773 if (!boot_params.hdr.root_flags)
774 root_mountflags &= ~MS_RDONLY;
775 init_mm.start_code = (unsigned long) _text;
776 init_mm.end_code = (unsigned long) _etext;
777 init_mm.end_data = (unsigned long) _edata;
778 init_mm.brk = _brk_end;
779
780 code_resource.start = virt_to_phys(_text);
781 code_resource.end = virt_to_phys(_etext)-1;
782 data_resource.start = virt_to_phys(_etext);
783 data_resource.end = virt_to_phys(_edata)-1;
784 bss_resource.start = virt_to_phys(&__bss_start);
785 bss_resource.end = virt_to_phys(&__bss_stop)-1;
786
787 #ifdef CONFIG_CMDLINE_BOOL
788 #ifdef CONFIG_CMDLINE_OVERRIDE
789 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
790 #else
791 if (builtin_cmdline[0]) {
792 /* append boot loader cmdline to builtin */
793 strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
794 strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
795 strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
796 }
797 #endif
798 #endif
799
800 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
801 *cmdline_p = command_line;
802
803 /*
804 * x86_configure_nx() is called before parse_early_param() to detect
805 * whether hardware doesn't support NX (so that the early EHCI debug
806 * console setup can safely call set_fixmap()). It may then be called
807 * again from within noexec_setup() during parsing early parameters
808 * to honor the respective command line option.
809 */
810 x86_configure_nx();
811
812 parse_early_param();
813
814 x86_report_nx();
815
816 /* after early param, so could get panic from serial */
817 memblock_x86_reserve_range_setup_data();
818
819 if (acpi_mps_check()) {
820 #ifdef CONFIG_X86_LOCAL_APIC
821 disable_apic = 1;
822 #endif
823 setup_clear_cpu_cap(X86_FEATURE_APIC);
824 }
825
826 #ifdef CONFIG_PCI
827 if (pci_early_dump_regs)
828 early_dump_pci_devices();
829 #endif
830
831 finish_e820_parsing();
832
833 if (efi_enabled)
834 efi_init();
835
836 dmi_scan_machine();
837
838 /*
839 * VMware detection requires dmi to be available, so this
840 * needs to be done after dmi_scan_machine, for the BP.
841 */
842 init_hypervisor_platform();
843
844 x86_init.resources.probe_roms();
845
846 /* after parse_early_param, so could debug it */
847 insert_resource(&iomem_resource, &code_resource);
848 insert_resource(&iomem_resource, &data_resource);
849 insert_resource(&iomem_resource, &bss_resource);
850
851 trim_bios_range();
852 #ifdef CONFIG_X86_32
853 if (ppro_with_ram_bug()) {
854 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
855 E820_RESERVED);
856 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
857 printk(KERN_INFO "fixed physical RAM map:\n");
858 e820_print_map("bad_ppro");
859 }
860 #else
861 early_gart_iommu_check();
862 #endif
863
864 /*
865 * partially used pages are not usable - thus
866 * we are rounding upwards:
867 */
868 max_pfn = e820_end_of_ram_pfn();
869
870 /* update e820 for memory not covered by WB MTRRs */
871 mtrr_bp_init();
872 if (mtrr_trim_uncached_memory(max_pfn))
873 max_pfn = e820_end_of_ram_pfn();
874
875 #ifdef CONFIG_X86_32
876 /* max_low_pfn get updated here */
877 find_low_pfn_range();
878 #else
879 num_physpages = max_pfn;
880
881 check_x2apic();
882
883 /* How many end-of-memory variables you have, grandma! */
884 /* need this before calling reserve_initrd */
885 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
886 max_low_pfn = e820_end_of_low_ram_pfn();
887 else
888 max_low_pfn = max_pfn;
889
890 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
891 #endif
892
893 /*
894 * Find and reserve possible boot-time SMP configuration:
895 */
896 find_smp_config();
897
898 reserve_ibft_region();
899
900 /*
901 * Need to conclude brk, before memblock_x86_fill()
902 * it could use memblock_find_in_range, could overlap with
903 * brk area.
904 */
905 reserve_brk();
906
907 cleanup_highmap();
908
909 memblock.current_limit = get_max_mapped();
910 memblock_x86_fill();
911
912 /*
913 * The EFI specification says that boot service code won't be called
914 * after ExitBootServices(). This is, in fact, a lie.
915 */
916 if (efi_enabled)
917 efi_reserve_boot_services();
918
919 /* preallocate 4k for mptable mpc */
920 early_reserve_e820_mpc_new();
921
922 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
923 setup_bios_corruption_check();
924 #endif
925
926 printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n",
927 max_pfn_mapped<<PAGE_SHIFT);
928
929 setup_trampolines();
930
931 init_gbpages();
932
933 /* max_pfn_mapped is updated here */
934 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
935 max_pfn_mapped = max_low_pfn_mapped;
936
937 #ifdef CONFIG_X86_64
938 if (max_pfn > max_low_pfn) {
939 max_pfn_mapped = init_memory_mapping(1UL<<32,
940 max_pfn<<PAGE_SHIFT);
941 /* can we preseve max_low_pfn ?*/
942 max_low_pfn = max_pfn;
943 }
944 #endif
945 memblock.current_limit = get_max_mapped();
946
947 /*
948 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
949 */
950
951 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
952 if (init_ohci1394_dma_early)
953 init_ohci1394_dma_on_all_controllers();
954 #endif
955 /* Allocate bigger log buffer */
956 setup_log_buf(1);
957
958 reserve_initrd();
959
960 reserve_crashkernel();
961
962 vsmp_init();
963
964 io_delay_init();
965
966 /*
967 * Parse the ACPI tables for possible boot-time SMP configuration.
968 */
969 acpi_boot_table_init();
970
971 early_acpi_boot_init();
972
973 initmem_init();
974 memblock_find_dma_reserve();
975
976 #ifdef CONFIG_KVM_CLOCK
977 kvmclock_init();
978 #endif
979
980 x86_init.paging.pagetable_setup_start(swapper_pg_dir);
981 paging_init();
982 x86_init.paging.pagetable_setup_done(swapper_pg_dir);
983
984 if (boot_cpu_data.cpuid_level >= 0) {
985 /* A CPU has %cr4 if and only if it has CPUID */
986 mmu_cr4_features = read_cr4();
987 }
988
989 #ifdef CONFIG_X86_32
990 /* sync back kernel address range */
991 clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY,
992 swapper_pg_dir + KERNEL_PGD_BOUNDARY,
993 KERNEL_PGD_PTRS);
994 #endif
995
996 tboot_probe();
997
998 #ifdef CONFIG_X86_64
999 map_vsyscall();
1000 #endif
1001
1002 generic_apic_probe();
1003
1004 early_quirks();
1005
1006 /*
1007 * Read APIC and some other early information from ACPI tables.
1008 */
1009 acpi_boot_init();
1010 sfi_init();
1011 x86_dtb_init();
1012
1013 /*
1014 * get boot-time SMP configuration:
1015 */
1016 if (smp_found_config)
1017 get_smp_config();
1018
1019 prefill_possible_map();
1020
1021 init_cpu_to_node();
1022
1023 init_apic_mappings();
1024 ioapic_and_gsi_init();
1025
1026 kvm_guest_init();
1027
1028 e820_reserve_resources();
1029 e820_mark_nosave_regions(max_low_pfn);
1030
1031 x86_init.resources.reserve_resources();
1032
1033 e820_setup_gap();
1034
1035 #ifdef CONFIG_VT
1036 #if defined(CONFIG_VGA_CONSOLE)
1037 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
1038 conswitchp = &vga_con;
1039 #elif defined(CONFIG_DUMMY_CONSOLE)
1040 conswitchp = &dummy_con;
1041 #endif
1042 #endif
1043 x86_init.oem.banner();
1044
1045 x86_init.timers.wallclock_init();
1046
1047 mcheck_init();
1048
1049 arch_init_ideal_nops();
1050 }
1051
1052 #ifdef CONFIG_X86_32
1053
1054 static struct resource video_ram_resource = {
1055 .name = "Video RAM area",
1056 .start = 0xa0000,
1057 .end = 0xbffff,
1058 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
1059 };
1060
1061 void __init i386_reserve_resources(void)
1062 {
1063 request_resource(&iomem_resource, &video_ram_resource);
1064 reserve_standard_io_resources();
1065 }
1066
1067 #endif /* CONFIG_X86_32 */
Linux kernel - Deliverables
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