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-rw-r--r--arch/x86/kernel/setup.c916
1 files changed, 829 insertions, 87 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 6f80b852a196..987b6fde3a99 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1,139 +1,881 @@
1#include <linux/kernel.h> 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>
2#include <linux/module.h> 38#include <linux/module.h>
39#include <linux/efi.h>
3#include <linux/init.h> 40#include <linux/init.h>
4#include <linux/bootmem.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#include <linux/highmem.h>
61
62#include <linux/kallsyms.h>
63#include <linux/edd.h>
64#include <linux/iscsi_ibft.h>
65#include <linux/kexec.h>
66#include <linux/cpufreq.h>
67#include <linux/dma-mapping.h>
68#include <linux/ctype.h>
69#include <linux/uaccess.h>
70
5#include <linux/percpu.h> 71#include <linux/percpu.h>
72#include <linux/crash_dump.h>
73
74#include <video/edid.h>
75
76#include <asm/mtrr.h>
77#include <asm/apic.h>
78#include <asm/e820.h>
79#include <asm/mpspec.h>
80#include <asm/setup.h>
81#include <asm/arch_hooks.h>
82#include <asm/efi.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/vmi.h>
88#include <setup_arch.h>
89#include <asm/bios_ebda.h>
90#include <asm/cacheflush.h>
91#include <asm/processor.h>
92#include <asm/bugs.h>
93
94#include <asm/system.h>
95#include <asm/vsyscall.h>
6#include <asm/smp.h> 96#include <asm/smp.h>
97#include <asm/desc.h>
98#include <asm/dma.h>
99#include <asm/gart.h>
100#include <asm/mmu_context.h>
101#include <asm/proto.h>
102
103#include <mach_apic.h>
104#include <asm/paravirt.h>
105
7#include <asm/percpu.h> 106#include <asm/percpu.h>
8#include <asm/sections.h> 107#include <asm/sections.h>
9#include <asm/processor.h>
10#include <asm/setup.h>
11#include <asm/topology.h> 108#include <asm/topology.h>
12#include <asm/mpspec.h>
13#include <asm/apicdef.h> 109#include <asm/apicdef.h>
110#ifdef CONFIG_X86_64
111#include <asm/numa_64.h>
112#endif
14 113
15#ifdef CONFIG_X86_LOCAL_APIC 114#ifndef ARCH_SETUP
16unsigned int num_processors; 115#define ARCH_SETUP
17unsigned disabled_cpus __cpuinitdata; 116#endif
18/* Processor that is doing the boot up */
19unsigned int boot_cpu_physical_apicid = -1U;
20EXPORT_SYMBOL(boot_cpu_physical_apicid);
21 117
22DEFINE_PER_CPU(u16, x86_cpu_to_apicid) = BAD_APICID; 118#ifndef CONFIG_DEBUG_BOOT_PARAMS
23EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid); 119struct boot_params __initdata boot_params;
120#else
121struct boot_params boot_params;
122#endif
24 123
25/* Bitmask of physically existing CPUs */ 124/*
26physid_mask_t phys_cpu_present_map; 125 * Machine setup..
126 */
127static struct resource data_resource = {
128 .name = "Kernel data",
129 .start = 0,
130 .end = 0,
131 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
132};
133
134static struct resource code_resource = {
135 .name = "Kernel code",
136 .start = 0,
137 .end = 0,
138 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
139};
140
141static struct resource bss_resource = {
142 .name = "Kernel bss",
143 .start = 0,
144 .end = 0,
145 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
146};
147
148
149#ifdef CONFIG_X86_32
150/* This value is set up by the early boot code to point to the value
151 immediately after the boot time page tables. It contains a *physical*
152 address, and must not be in the .bss segment! */
153unsigned long init_pg_tables_start __initdata = ~0UL;
154unsigned long init_pg_tables_end __initdata = ~0UL;
155
156static struct resource video_ram_resource = {
157 .name = "Video RAM area",
158 .start = 0xa0000,
159 .end = 0xbffff,
160 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
161};
162
163/* cpu data as detected by the assembly code in head.S */
164struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1};
165/* common cpu data for all cpus */
166struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1};
167EXPORT_SYMBOL(boot_cpu_data);
168static void set_mca_bus(int x)
169{
170#ifdef CONFIG_MCA
171 MCA_bus = x;
172#endif
173}
174
175unsigned int def_to_bigsmp;
176
177/* for MCA, but anyone else can use it if they want */
178unsigned int machine_id;
179unsigned int machine_submodel_id;
180unsigned int BIOS_revision;
181
182struct apm_info apm_info;
183EXPORT_SYMBOL(apm_info);
184
185#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
186 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
187struct ist_info ist_info;
188EXPORT_SYMBOL(ist_info);
189#else
190struct ist_info ist_info;
27#endif 191#endif
28 192
29#if defined(CONFIG_HAVE_SETUP_PER_CPU_AREA) && defined(CONFIG_X86_SMP) 193#else
194struct cpuinfo_x86 boot_cpu_data __read_mostly;
195EXPORT_SYMBOL(boot_cpu_data);
196#endif
197
198
199#if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
200unsigned long mmu_cr4_features;
201#else
202unsigned long mmu_cr4_features = X86_CR4_PAE;
203#endif
204
205/* Boot loader ID as an integer, for the benefit of proc_dointvec */
206int bootloader_type;
207
30/* 208/*
31 * Copy data used in early init routines from the initial arrays to the 209 * Early DMI memory
32 * per cpu data areas. These arrays then become expendable and the 210 */
33 * *_early_ptr's are zeroed indicating that the static arrays are gone. 211int dmi_alloc_index;
212char dmi_alloc_data[DMI_MAX_DATA];
213
214/*
215 * Setup options
216 */
217struct screen_info screen_info;
218EXPORT_SYMBOL(screen_info);
219struct edid_info edid_info;
220EXPORT_SYMBOL_GPL(edid_info);
221
222extern int root_mountflags;
223
224unsigned long saved_video_mode;
225
226#define RAMDISK_IMAGE_START_MASK 0x07FF
227#define RAMDISK_PROMPT_FLAG 0x8000
228#define RAMDISK_LOAD_FLAG 0x4000
229
230static char __initdata command_line[COMMAND_LINE_SIZE];
231
232#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
233struct edd edd;
234#ifdef CONFIG_EDD_MODULE
235EXPORT_SYMBOL(edd);
236#endif
237/**
238 * copy_edd() - Copy the BIOS EDD information
239 * from boot_params into a safe place.
240 *
34 */ 241 */
35static void __init setup_per_cpu_maps(void) 242static 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
251static 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)
261static void __init relocate_initrd(void)
36{ 262{
37 int cpu;
38 263
39 for_each_possible_cpu(cpu) { 264 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
40 per_cpu(x86_cpu_to_apicid, cpu) = x86_cpu_to_apicid_init[cpu]; 265 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
41 per_cpu(x86_bios_cpu_apicid, cpu) = 266 u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
42 x86_bios_cpu_apicid_init[cpu]; 267 u64 ramdisk_here;
43#ifdef CONFIG_NUMA 268 unsigned long slop, clen, mapaddr;
44 per_cpu(x86_cpu_to_node_map, cpu) = 269 char *p, *q;
45 x86_cpu_to_node_map_init[cpu]; 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_ioremap(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}
46#endif 322#endif
323
324static 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;
47 } 357 }
48 358
49 /* indicate the early static arrays will soon be gone */ 359#ifdef CONFIG_X86_32
50 x86_cpu_to_apicid_early_ptr = NULL; 360 relocate_initrd();
51 x86_bios_cpu_apicid_early_ptr = NULL; 361#else
52#ifdef CONFIG_NUMA 362 printk(KERN_ERR "initrd extends beyond end of memory "
53 x86_cpu_to_node_map_early_ptr = NULL; 363 "(0x%08llx > 0x%08llx)\ndisabling initrd\n",
364 ramdisk_end, end_of_lowmem);
365 initrd_start = 0;
54#endif 366#endif
367 free_early(ramdisk_image, ramdisk_end);
368}
369#else
370static void __init reserve_initrd(void)
371{
372}
373#endif /* CONFIG_BLK_DEV_INITRD */
374
375static 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_ioremap(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 }
55} 395}
56 396
57#ifdef CONFIG_HAVE_CPUMASK_OF_CPU_MAP 397static void __init e820_reserve_setup_data(void)
58cpumask_t *cpumask_of_cpu_map __read_mostly; 398{
59EXPORT_SYMBOL(cpumask_of_cpu_map); 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_ioremap(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}
60 422
61/* requires nr_cpu_ids to be initialized */ 423static void __init reserve_early_setup_data(void)
62static void __init setup_cpumask_of_cpu(void)
63{ 424{
64 int i; 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_ioremap(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 */
453unsigned long long find_and_reserve_crashkernel(unsigned long long size)
454{
455 const unsigned long long alignment = 16<<20; /* 16M */
456 unsigned long long start = 0LL;
457
458 while (1) {
459 int ret;
460
461 start = find_e820_area(start, ULONG_MAX, size, alignment);
462 if (start == -1ULL)
463 return start;
464
465 /* try to reserve it */
466 ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE);
467 if (ret >= 0)
468 return start;
469
470 start += alignment;
471 }
472}
473
474static inline unsigned long long get_total_mem(void)
475{
476 unsigned long long total;
477
478 total = max_low_pfn - min_low_pfn;
479#ifdef CONFIG_HIGHMEM
480 total += highend_pfn - highstart_pfn;
481#endif
482
483 return total << PAGE_SHIFT;
484}
485
486static void __init reserve_crashkernel(void)
487{
488 unsigned long long total_mem;
489 unsigned long long crash_size, crash_base;
490 int ret;
491
492 total_mem = get_total_mem();
493
494 ret = parse_crashkernel(boot_command_line, total_mem,
495 &crash_size, &crash_base);
496 if (ret != 0 || crash_size <= 0)
497 return;
498
499 /* 0 means: find the address automatically */
500 if (crash_base <= 0) {
501 crash_base = find_and_reserve_crashkernel(crash_size);
502 if (crash_base == -1ULL) {
503 pr_info("crashkernel reservation failed. "
504 "No suitable area found.\n");
505 return;
506 }
507 } else {
508 ret = reserve_bootmem_generic(crash_base, crash_size,
509 BOOTMEM_EXCLUSIVE);
510 if (ret < 0) {
511 pr_info("crashkernel reservation failed - "
512 "memory is in use\n");
513 return;
514 }
515 }
516
517 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
518 "for crashkernel (System RAM: %ldMB)\n",
519 (unsigned long)(crash_size >> 20),
520 (unsigned long)(crash_base >> 20),
521 (unsigned long)(total_mem >> 20));
65 522
66 /* alloc_bootmem zeroes memory */ 523 crashk_res.start = crash_base;
67 cpumask_of_cpu_map = alloc_bootmem_low(sizeof(cpumask_t) * nr_cpu_ids); 524 crashk_res.end = crash_base + crash_size - 1;
68 for (i = 0; i < nr_cpu_ids; i++) 525 insert_resource(&iomem_resource, &crashk_res);
69 cpu_set(i, cpumask_of_cpu_map[i]);
70} 526}
71#else 527#else
72static inline void setup_cpumask_of_cpu(void) { } 528static void __init reserve_crashkernel(void)
529{
530}
73#endif 531#endif
74 532
75#ifdef CONFIG_X86_32 533static struct resource standard_io_resources[] = {
76/* 534 { .name = "dma1", .start = 0x00, .end = 0x1f,
77 * Great future not-so-futuristic plan: make i386 and x86_64 do it 535 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
78 * the same way 536 { .name = "pic1", .start = 0x20, .end = 0x21,
537 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
538 { .name = "timer0", .start = 0x40, .end = 0x43,
539 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
540 { .name = "timer1", .start = 0x50, .end = 0x53,
541 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
542 { .name = "keyboard", .start = 0x60, .end = 0x60,
543 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
544 { .name = "keyboard", .start = 0x64, .end = 0x64,
545 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
546 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
547 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
548 { .name = "pic2", .start = 0xa0, .end = 0xa1,
549 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
550 { .name = "dma2", .start = 0xc0, .end = 0xdf,
551 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
552 { .name = "fpu", .start = 0xf0, .end = 0xff,
553 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
554};
555
556static void __init reserve_standard_io_resources(void)
557{
558 int i;
559
560 /* request I/O space for devices used on all i[345]86 PCs */
561 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
562 request_resource(&ioport_resource, &standard_io_resources[i]);
563
564}
565
566#ifdef CONFIG_PROC_VMCORE
567/* elfcorehdr= specifies the location of elf core header
568 * stored by the crashed kernel. This option will be passed
569 * by kexec loader to the capture kernel.
79 */ 570 */
80unsigned long __per_cpu_offset[NR_CPUS] __read_mostly; 571static int __init setup_elfcorehdr(char *arg)
81EXPORT_SYMBOL(__per_cpu_offset); 572{
573 char *end;
574 if (!arg)
575 return -EINVAL;
576 elfcorehdr_addr = memparse(arg, &end);
577 return end > arg ? 0 : -EINVAL;
578}
579early_param("elfcorehdr", setup_elfcorehdr);
82#endif 580#endif
83 581
84/* 582/*
85 * Great future plan: 583 * Determine if we were loaded by an EFI loader. If so, then we have also been
86 * Declare PDA itself and support (irqstack,tss,pgd) as per cpu data. 584 * passed the efi memmap, systab, etc., so we should use these data structures
87 * Always point %gs to its beginning 585 * for initialization. Note, the efi init code path is determined by the
586 * global efi_enabled. This allows the same kernel image to be used on existing
587 * systems (with a traditional BIOS) as well as on EFI systems.
588 */
589/*
590 * setup_arch - architecture-specific boot-time initializations
591 *
592 * Note: On x86_64, fixmaps are ready for use even before this is called.
88 */ 593 */
89void __init setup_per_cpu_areas(void) 594
595void __init setup_arch(char **cmdline_p)
90{ 596{
91 int i, highest_cpu = 0; 597#ifdef CONFIG_X86_32
92 unsigned long size; 598 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
599 visws_early_detect();
600 pre_setup_arch_hook();
601 early_cpu_init();
602#else
603 printk(KERN_INFO "Command line: %s\n", boot_command_line);
604#endif
93 605
94#ifdef CONFIG_HOTPLUG_CPU 606 early_ioremap_init();
95 prefill_possible_map(); 607
608 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
609 screen_info = boot_params.screen_info;
610 edid_info = boot_params.edid_info;
611#ifdef CONFIG_X86_32
612 apm_info.bios = boot_params.apm_bios_info;
613 ist_info = boot_params.ist_info;
614 if (boot_params.sys_desc_table.length != 0) {
615 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
616 machine_id = boot_params.sys_desc_table.table[0];
617 machine_submodel_id = boot_params.sys_desc_table.table[1];
618 BIOS_revision = boot_params.sys_desc_table.table[2];
619 }
620#endif
621 saved_video_mode = boot_params.hdr.vid_mode;
622 bootloader_type = boot_params.hdr.type_of_loader;
623
624#ifdef CONFIG_BLK_DEV_RAM
625 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
626 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
627 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
628#endif
629#ifdef CONFIG_EFI
630 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
631#ifdef CONFIG_X86_32
632 "EL32",
633#else
634 "EL64",
96#endif 635#endif
636 4)) {
637 efi_enabled = 1;
638 efi_reserve_early();
639 }
640#endif
641
642 ARCH_SETUP
643
644 setup_memory_map();
645 parse_setup_data();
646 /* update the e820_saved too */
647 e820_reserve_setup_data();
97 648
98 /* Copy section for each CPU (we discard the original) */ 649 copy_edd();
99 size = PERCPU_ENOUGH_ROOM;
100 printk(KERN_INFO "PERCPU: Allocating %lu bytes of per cpu data\n",
101 size);
102 650
103 for_each_possible_cpu(i) { 651 if (!boot_params.hdr.root_flags)
104 char *ptr; 652 root_mountflags &= ~MS_RDONLY;
105#ifndef CONFIG_NEED_MULTIPLE_NODES 653 init_mm.start_code = (unsigned long) _text;
106 ptr = alloc_bootmem_pages(size); 654 init_mm.end_code = (unsigned long) _etext;
655 init_mm.end_data = (unsigned long) _edata;
656#ifdef CONFIG_X86_32
657 init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
107#else 658#else
108 int node = early_cpu_to_node(i); 659 init_mm.brk = (unsigned long) &_end;
109 if (!node_online(node) || !NODE_DATA(node)) {
110 ptr = alloc_bootmem_pages(size);
111 printk(KERN_INFO
112 "cpu %d has no node or node-local memory\n", i);
113 }
114 else
115 ptr = alloc_bootmem_pages_node(NODE_DATA(node), size);
116#endif 660#endif
117 if (!ptr) 661
118 panic("Cannot allocate cpu data for CPU %d\n", i); 662 code_resource.start = virt_to_phys(_text);
663 code_resource.end = virt_to_phys(_etext)-1;
664 data_resource.start = virt_to_phys(_etext);
665 data_resource.end = virt_to_phys(_edata)-1;
666 bss_resource.start = virt_to_phys(&__bss_start);
667 bss_resource.end = virt_to_phys(&__bss_stop)-1;
668
119#ifdef CONFIG_X86_64 669#ifdef CONFIG_X86_64
120 cpu_pda(i)->data_offset = ptr - __per_cpu_start; 670 early_cpu_init();
671#endif
672 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
673 *cmdline_p = command_line;
674
675 parse_early_param();
676
677 /* after early param, so could get panic from serial */
678 reserve_early_setup_data();
679
680 if (acpi_mps_check()) {
681#ifdef CONFIG_X86_LOCAL_APIC
682 disable_apic = 1;
683#endif
684 clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
685 }
686
687 finish_e820_parsing();
688
689#ifdef CONFIG_X86_32
690 probe_roms();
691#endif
692
693 /* after parse_early_param, so could debug it */
694 insert_resource(&iomem_resource, &code_resource);
695 insert_resource(&iomem_resource, &data_resource);
696 insert_resource(&iomem_resource, &bss_resource);
697
698 if (efi_enabled)
699 efi_init();
700
701#ifdef CONFIG_X86_32
702 if (ppro_with_ram_bug()) {
703 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
704 E820_RESERVED);
705 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
706 printk(KERN_INFO "fixed physical RAM map:\n");
707 e820_print_map("bad_ppro");
708 }
709#else
710 early_gart_iommu_check();
711#endif
712
713 /*
714 * partially used pages are not usable - thus
715 * we are rounding upwards:
716 */
717 max_pfn = e820_end_of_ram_pfn();
718
719 /* preallocate 4k for mptable mpc */
720 early_reserve_e820_mpc_new();
721 /* update e820 for memory not covered by WB MTRRs */
722 mtrr_bp_init();
723 if (mtrr_trim_uncached_memory(max_pfn))
724 max_pfn = e820_end_of_ram_pfn();
725
726#ifdef CONFIG_X86_32
727 /* max_low_pfn get updated here */
728 find_low_pfn_range();
121#else 729#else
122 __per_cpu_offset[i] = ptr - __per_cpu_start; 730 num_physpages = max_pfn;
731
732 check_efer();
733
734 /* How many end-of-memory variables you have, grandma! */
735 /* need this before calling reserve_initrd */
736 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
737 max_low_pfn = e820_end_of_low_ram_pfn();
738 else
739 max_low_pfn = max_pfn;
740
741 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
123#endif 742#endif
124 memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
125 743
126 highest_cpu = i; 744 /* max_pfn_mapped is updated here */
745 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
746 max_pfn_mapped = max_low_pfn_mapped;
747
748#ifdef CONFIG_X86_64
749 if (max_pfn > max_low_pfn) {
750 max_pfn_mapped = init_memory_mapping(1UL<<32,
751 max_pfn<<PAGE_SHIFT);
752 /* can we preseve max_low_pfn ?*/
753 max_low_pfn = max_pfn;
127 } 754 }
755#endif
756
757 /*
758 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
759 */
128 760
129 nr_cpu_ids = highest_cpu + 1; 761#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
130 printk(KERN_DEBUG "NR_CPUS: %d, nr_cpu_ids: %d\n", NR_CPUS, nr_cpu_ids); 762 if (init_ohci1394_dma_early)
763 init_ohci1394_dma_on_all_controllers();
764#endif
131 765
132 /* Setup percpu data maps */ 766 reserve_initrd();
133 setup_per_cpu_maps();
134 767
135 /* Setup cpumask_of_cpu map */ 768#ifdef CONFIG_X86_64
136 setup_cpumask_of_cpu(); 769 vsmp_init();
137} 770#endif
771
772 dmi_scan_machine();
773
774 io_delay_init();
138 775
776 /*
777 * Parse the ACPI tables for possible boot-time SMP configuration.
778 */
779 acpi_boot_table_init();
780
781#ifdef CONFIG_ACPI_NUMA
782 /*
783 * Parse SRAT to discover nodes.
784 */
785 acpi_numa_init();
786#endif
787
788 initmem_init(0, max_pfn);
789
790#ifdef CONFIG_X86_64
791 dma32_reserve_bootmem();
792#endif
793
794#ifdef CONFIG_ACPI_SLEEP
795 /*
796 * Reserve low memory region for sleep support.
797 */
798 acpi_reserve_bootmem();
799#endif
800#ifdef CONFIG_X86_FIND_SMP_CONFIG
801 /*
802 * Find and reserve possible boot-time SMP configuration:
803 */
804 find_smp_config();
139#endif 805#endif
806 reserve_crashkernel();
807
808 reserve_ibft_region();
809
810#ifdef CONFIG_KVM_CLOCK
811 kvmclock_init();
812#endif
813
814#if defined(CONFIG_VMI) && defined(CONFIG_X86_32)
815 /*
816 * Must be after max_low_pfn is determined, and before kernel
817 * pagetables are setup.
818 */
819 vmi_init();
820#endif
821
822 paging_init();
823
824#ifdef CONFIG_X86_64
825 map_vsyscall();
826#endif
827
828#ifdef CONFIG_X86_GENERICARCH
829 generic_apic_probe();
830#endif
831
832 early_quirks();
833
834 /*
835 * Read APIC and some other early information from ACPI tables.
836 */
837 acpi_boot_init();
838
839#if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
840 /*
841 * get boot-time SMP configuration:
842 */
843 if (smp_found_config)
844 get_smp_config();
845#endif
846
847 prefill_possible_map();
848#ifdef CONFIG_X86_64
849 init_cpu_to_node();
850#endif
851
852 init_apic_mappings();
853 ioapic_init_mappings();
854
855#if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) && defined(CONFIG_X86_32)
856 if (def_to_bigsmp)
857 printk(KERN_WARNING "More than 8 CPUs detected and "
858 "CONFIG_X86_PC cannot handle it.\nUse "
859 "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
860#endif
861 kvm_guest_init();
862
863 e820_reserve_resources();
864 e820_mark_nosave_regions(max_low_pfn);
865
866#ifdef CONFIG_X86_32
867 request_resource(&iomem_resource, &video_ram_resource);
868#endif
869 reserve_standard_io_resources();
870
871 e820_setup_gap();
872
873#ifdef CONFIG_VT
874#if defined(CONFIG_VGA_CONSOLE)
875 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
876 conswitchp = &vga_con;
877#elif defined(CONFIG_DUMMY_CONSOLE)
878 conswitchp = &dummy_con;
879#endif
880#endif
881}
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-06 10:15:37 -0500