aboutsummaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/setup.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/setup.c')
-rw-r--r--arch/x86/kernel/setup.c890
1 files changed, 803 insertions, 87 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 6f80b852a19..cfcfbefee0b 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1,139 +1,855 @@
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;
191#endif
192
193#else
194struct cpuinfo_x86 boot_cpu_data __read_mostly;
195EXPORT_SYMBOL(boot_cpu_data);
27#endif 196#endif
28 197
29#if defined(CONFIG_HAVE_SETUP_PER_CPU_AREA) && defined(CONFIG_X86_SMP) 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)
36{ 252{
37 int cpu; 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)
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;
38 270
39 for_each_possible_cpu(cpu) { 271 /* We need to move the initrd down into lowmem */
40 per_cpu(x86_cpu_to_apicid, cpu) = x86_cpu_to_apicid_init[cpu]; 272 ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size,
41 per_cpu(x86_bios_cpu_apicid, cpu) = 273 PAGE_SIZE);
42 x86_bios_cpu_apicid_init[cpu]; 274
43#ifdef CONFIG_NUMA 275 if (ramdisk_here == -1ULL)
44 per_cpu(x86_cpu_to_node_map, cpu) = 276 panic("Cannot find place for new RAMDISK of size %lld\n",
45 x86_cpu_to_node_map_init[cpu]; 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;
47 } 342 }
48 343
49 /* indicate the early static arrays will soon be gone */ 344 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image,
50 x86_cpu_to_apicid_early_ptr = NULL; 345 ramdisk_end);
51 x86_bios_cpu_apicid_early_ptr = NULL; 346
52#ifdef CONFIG_NUMA 347
53 x86_cpu_to_node_map_early_ptr = NULL; 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;
54#endif 366#endif
367 free_early(ramdisk_image, ramdisk_end);
55} 368}
369#else
370static void __init reserve_initrd(void)
371{
372}
373#endif /* CONFIG_BLK_DEV_INITRD */
56 374
57#ifdef CONFIG_HAVE_CPUMASK_OF_CPU_MAP 375static void __init parse_setup_data(void)
58cpumask_t *cpumask_of_cpu_map __read_mostly; 376{
59EXPORT_SYMBOL(cpumask_of_cpu_map); 377 struct setup_data *data;
378 u64 pa_data;
60 379
61/* requires nr_cpu_ids to be initialized */ 380 if (boot_params.hdr.version < 0x0209)
62static void __init setup_cpumask_of_cpu(void) 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 }
395}
396
397static void __init reserve_setup_data(void)
63{ 398{
64 int i; 399 struct setup_data *data;
400 u64 pa_data;
401 char buf[32];
402 int found = 0;
403
404 if (boot_params.hdr.version < 0x0209)
405 return;
406 pa_data = boot_params.hdr.setup_data;
407 while (pa_data) {
408 data = early_ioremap(pa_data, sizeof(*data));
409 sprintf(buf, "setup data %x", data->type);
410 reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
411 e820_update_range(pa_data, sizeof(*data)+data->len,
412 E820_RAM, E820_RESERVED_KERN);
413 found = 1;
414 pa_data = data->next;
415 early_iounmap(data, sizeof(*data));
416 }
417 if (!found)
418 return;
419
420 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
421 printk(KERN_INFO "extended physical RAM map:\n");
422 e820_print_map("reserve setup_data");
423}
424
425/*
426 * --------- Crashkernel reservation ------------------------------
427 */
428
429#ifdef CONFIG_KEXEC
430
431/**
432 * Reserve @size bytes of crashkernel memory at any suitable offset.
433 *
434 * @size: Size of the crashkernel memory to reserve.
435 * Returns the base address on success, and -1ULL on failure.
436 */
437unsigned long long find_and_reserve_crashkernel(unsigned long long size)
438{
439 const unsigned long long alignment = 16<<20; /* 16M */
440 unsigned long long start = 0LL;
441
442 while (1) {
443 int ret;
444
445 start = find_e820_area(start, ULONG_MAX, size, alignment);
446 if (start == -1ULL)
447 return start;
448
449 /* try to reserve it */
450 ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE);
451 if (ret >= 0)
452 return start;
453
454 start += alignment;
455 }
456}
65 457
66 /* alloc_bootmem zeroes memory */ 458static inline unsigned long long get_total_mem(void)
67 cpumask_of_cpu_map = alloc_bootmem_low(sizeof(cpumask_t) * nr_cpu_ids); 459{
68 for (i = 0; i < nr_cpu_ids; i++) 460 unsigned long long total;
69 cpu_set(i, cpumask_of_cpu_map[i]); 461
462 total = max_low_pfn - min_low_pfn;
463#ifdef CONFIG_HIGHMEM
464 total += highend_pfn - highstart_pfn;
465#endif
466
467 return total << PAGE_SHIFT;
468}
469
470static void __init reserve_crashkernel(void)
471{
472 unsigned long long total_mem;
473 unsigned long long crash_size, crash_base;
474 int ret;
475
476 total_mem = get_total_mem();
477
478 ret = parse_crashkernel(boot_command_line, total_mem,
479 &crash_size, &crash_base);
480 if (ret != 0 || crash_size <= 0)
481 return;
482
483 /* 0 means: find the address automatically */
484 if (crash_base <= 0) {
485 crash_base = find_and_reserve_crashkernel(crash_size);
486 if (crash_base == -1ULL) {
487 pr_info("crashkernel reservation failed. "
488 "No suitable area found.\n");
489 return;
490 }
491 } else {
492 ret = reserve_bootmem_generic(crash_base, crash_size,
493 BOOTMEM_EXCLUSIVE);
494 if (ret < 0) {
495 pr_info("crashkernel reservation failed - "
496 "memory is in use\n");
497 return;
498 }
499 }
500
501 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
502 "for crashkernel (System RAM: %ldMB)\n",
503 (unsigned long)(crash_size >> 20),
504 (unsigned long)(crash_base >> 20),
505 (unsigned long)(total_mem >> 20));
506
507 crashk_res.start = crash_base;
508 crashk_res.end = crash_base + crash_size - 1;
509 insert_resource(&iomem_resource, &crashk_res);
70} 510}
71#else 511#else
72static inline void setup_cpumask_of_cpu(void) { } 512static void __init reserve_crashkernel(void)
513{
514}
73#endif 515#endif
74 516
75#ifdef CONFIG_X86_32 517static struct resource standard_io_resources[] = {
76/* 518 { .name = "dma1", .start = 0x00, .end = 0x1f,
77 * Great future not-so-futuristic plan: make i386 and x86_64 do it 519 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
78 * the same way 520 { .name = "pic1", .start = 0x20, .end = 0x21,
521 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
522 { .name = "timer0", .start = 0x40, .end = 0x43,
523 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
524 { .name = "timer1", .start = 0x50, .end = 0x53,
525 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
526 { .name = "keyboard", .start = 0x60, .end = 0x60,
527 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
528 { .name = "keyboard", .start = 0x64, .end = 0x64,
529 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
530 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
531 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
532 { .name = "pic2", .start = 0xa0, .end = 0xa1,
533 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
534 { .name = "dma2", .start = 0xc0, .end = 0xdf,
535 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
536 { .name = "fpu", .start = 0xf0, .end = 0xff,
537 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
538};
539
540static void __init reserve_standard_io_resources(void)
541{
542 int i;
543
544 /* request I/O space for devices used on all i[345]86 PCs */
545 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
546 request_resource(&ioport_resource, &standard_io_resources[i]);
547
548}
549
550#ifdef CONFIG_PROC_VMCORE
551/* elfcorehdr= specifies the location of elf core header
552 * stored by the crashed kernel. This option will be passed
553 * by kexec loader to the capture kernel.
79 */ 554 */
80unsigned long __per_cpu_offset[NR_CPUS] __read_mostly; 555static int __init setup_elfcorehdr(char *arg)
81EXPORT_SYMBOL(__per_cpu_offset); 556{
557 char *end;
558 if (!arg)
559 return -EINVAL;
560 elfcorehdr_addr = memparse(arg, &end);
561 return end > arg ? 0 : -EINVAL;
562}
563early_param("elfcorehdr", setup_elfcorehdr);
82#endif 564#endif
83 565
84/* 566/*
85 * Great future plan: 567 * 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. 568 * passed the efi memmap, systab, etc., so we should use these data structures
87 * Always point %gs to its beginning 569 * for initialization. Note, the efi init code path is determined by the
570 * global efi_enabled. This allows the same kernel image to be used on existing
571 * systems (with a traditional BIOS) as well as on EFI systems.
88 */ 572 */
89void __init setup_per_cpu_areas(void) 573/*
574 * setup_arch - architecture-specific boot-time initializations
575 *
576 * Note: On x86_64, fixmaps are ready for use even before this is called.
577 */
578
579void __init setup_arch(char **cmdline_p)
90{ 580{
91 int i, highest_cpu = 0; 581#ifdef CONFIG_X86_32
92 unsigned long size; 582 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
583 pre_setup_arch_hook();
584 early_cpu_init();
585#else
586 printk(KERN_INFO "Command line: %s\n", boot_command_line);
587#endif
93 588
94#ifdef CONFIG_HOTPLUG_CPU 589 early_ioremap_init();
95 prefill_possible_map(); 590
591 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
592 screen_info = boot_params.screen_info;
593 edid_info = boot_params.edid_info;
594#ifdef CONFIG_X86_32
595 apm_info.bios = boot_params.apm_bios_info;
596 ist_info = boot_params.ist_info;
597 if (boot_params.sys_desc_table.length != 0) {
598 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
599 machine_id = boot_params.sys_desc_table.table[0];
600 machine_submodel_id = boot_params.sys_desc_table.table[1];
601 BIOS_revision = boot_params.sys_desc_table.table[2];
602 }
96#endif 603#endif
604 saved_video_mode = boot_params.hdr.vid_mode;
605 bootloader_type = boot_params.hdr.type_of_loader;
606
607#ifdef CONFIG_BLK_DEV_RAM
608 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
609 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
610 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
611#endif
612#ifdef CONFIG_EFI
613 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
614#ifdef CONFIG_X86_32
615 "EL32",
616#else
617 "EL64",
618#endif
619 4)) {
620 efi_enabled = 1;
621 efi_reserve_early();
622 }
623#endif
624
625 ARCH_SETUP
97 626
98 /* Copy section for each CPU (we discard the original) */ 627 setup_memory_map();
99 size = PERCPU_ENOUGH_ROOM; 628 parse_setup_data();
100 printk(KERN_INFO "PERCPU: Allocating %lu bytes of per cpu data\n",
101 size);
102 629
103 for_each_possible_cpu(i) { 630 copy_edd();
104 char *ptr; 631
105#ifndef CONFIG_NEED_MULTIPLE_NODES 632 if (!boot_params.hdr.root_flags)
106 ptr = alloc_bootmem_pages(size); 633 root_mountflags &= ~MS_RDONLY;
634 init_mm.start_code = (unsigned long) _text;
635 init_mm.end_code = (unsigned long) _etext;
636 init_mm.end_data = (unsigned long) _edata;
637#ifdef CONFIG_X86_32
638 init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
107#else 639#else
108 int node = early_cpu_to_node(i); 640 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 641#endif
117 if (!ptr) 642
118 panic("Cannot allocate cpu data for CPU %d\n", i); 643 code_resource.start = virt_to_phys(_text);
644 code_resource.end = virt_to_phys(_etext)-1;
645 data_resource.start = virt_to_phys(_etext);
646 data_resource.end = virt_to_phys(_edata)-1;
647 bss_resource.start = virt_to_phys(&__bss_start);
648 bss_resource.end = virt_to_phys(&__bss_stop)-1;
649
119#ifdef CONFIG_X86_64 650#ifdef CONFIG_X86_64
120 cpu_pda(i)->data_offset = ptr - __per_cpu_start; 651 early_cpu_init();
652#endif
653 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
654 *cmdline_p = command_line;
655
656 parse_early_param();
657
658 /* after early param, so could get panic from serial */
659 reserve_setup_data();
660
661 if (acpi_mps_check()) {
662#ifdef CONFIG_X86_LOCAL_APIC
663 disable_apic = 1;
664#endif
665 clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
666 }
667
668 finish_e820_parsing();
669
670#ifdef CONFIG_X86_32
671 probe_roms();
672#endif
673
674 /* after parse_early_param, so could debug it */
675 insert_resource(&iomem_resource, &code_resource);
676 insert_resource(&iomem_resource, &data_resource);
677 insert_resource(&iomem_resource, &bss_resource);
678
679 if (efi_enabled)
680 efi_init();
681
682#ifdef CONFIG_X86_32
683 if (ppro_with_ram_bug()) {
684 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
685 E820_RESERVED);
686 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
687 printk(KERN_INFO "fixed physical RAM map:\n");
688 e820_print_map("bad_ppro");
689 }
121#else 690#else
122 __per_cpu_offset[i] = ptr - __per_cpu_start; 691 early_gart_iommu_check();
123#endif 692#endif
124 memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
125 693
126 highest_cpu = i; 694 e820_register_active_regions(0, 0, -1UL);
695 /*
696 * partially used pages are not usable - thus
697 * we are rounding upwards:
698 */
699 max_pfn = e820_end_of_ram();
700
701 /* preallocate 4k for mptable mpc */
702 early_reserve_e820_mpc_new();
703 /* update e820 for memory not covered by WB MTRRs */
704 mtrr_bp_init();
705 if (mtrr_trim_uncached_memory(max_pfn)) {
706 remove_all_active_ranges();
707 e820_register_active_regions(0, 0, -1UL);
708 max_pfn = e820_end_of_ram();
127 } 709 }
128 710
129 nr_cpu_ids = highest_cpu + 1; 711#ifdef CONFIG_X86_32
130 printk(KERN_DEBUG "NR_CPUS: %d, nr_cpu_ids: %d\n", NR_CPUS, nr_cpu_ids); 712 /* max_low_pfn get updated here */
713 find_low_pfn_range();
714#else
715 num_physpages = max_pfn;
716
717 check_efer();
131 718
132 /* Setup percpu data maps */ 719 /* How many end-of-memory variables you have, grandma! */
133 setup_per_cpu_maps(); 720 /* need this before calling reserve_initrd */
721 max_low_pfn = max_pfn;
722 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
723#endif
134 724
135 /* Setup cpumask_of_cpu map */ 725 /* max_pfn_mapped is updated here */
136 setup_cpumask_of_cpu(); 726 max_pfn_mapped = init_memory_mapping(0, (max_low_pfn << PAGE_SHIFT));
137}
138 727
728 /*
729 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
730 */
731
732#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
733 if (init_ohci1394_dma_early)
734 init_ohci1394_dma_on_all_controllers();
139#endif 735#endif
736
737 reserve_initrd();
738
739#ifdef CONFIG_X86_64
740 vsmp_init();
741#endif
742
743 dmi_scan_machine();
744
745 io_delay_init();
746
747 /*
748 * Parse the ACPI tables for possible boot-time SMP configuration.
749 */
750 acpi_boot_table_init();
751
752 /* Remove active ranges so rediscovery with NUMA-awareness happens */
753 remove_all_active_ranges();
754
755#ifdef CONFIG_ACPI_NUMA
756 /*
757 * Parse SRAT to discover nodes.
758 */
759 acpi_numa_init();
760#endif
761
762 initmem_init(0, max_pfn);
763
764#ifdef CONFIG_X86_64
765 dma32_reserve_bootmem();
766#endif
767
768#ifdef CONFIG_ACPI_SLEEP
769 /*
770 * Reserve low memory region for sleep support.
771 */
772 acpi_reserve_bootmem();
773#endif
774#ifdef CONFIG_X86_FIND_SMP_CONFIG
775 /*
776 * Find and reserve possible boot-time SMP configuration:
777 */
778 find_smp_config();
779#endif
780 reserve_crashkernel();
781
782 reserve_ibft_region();
783
784#ifdef CONFIG_KVM_CLOCK
785 kvmclock_init();
786#endif
787
788#if defined(CONFIG_VMI) && defined(CONFIG_X86_32)
789 /*
790 * Must be after max_low_pfn is determined, and before kernel
791 * pagetables are setup.
792 */
793 vmi_init();
794#endif
795
796 paging_init();
797
798#ifdef CONFIG_X86_64
799 map_vsyscall();
800#endif
801
802#ifdef CONFIG_X86_GENERICARCH
803 generic_apic_probe();
804#endif
805
806 early_quirks();
807
808 /*
809 * Read APIC and some other early information from ACPI tables.
810 */
811 acpi_boot_init();
812
813#if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
814 /*
815 * get boot-time SMP configuration:
816 */
817 if (smp_found_config)
818 get_smp_config();
819#endif
820
821 prefill_possible_map();
822#ifdef CONFIG_X86_64
823 init_cpu_to_node();
824#endif
825
826 init_apic_mappings();
827 ioapic_init_mappings();
828
829#if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) && defined(CONFIG_X86_32)
830 if (def_to_bigsmp)
831 printk(KERN_WARNING "More than 8 CPUs detected and "
832 "CONFIG_X86_PC cannot handle it.\nUse "
833 "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
834#endif
835 kvm_guest_init();
836
837 e820_reserve_resources();
838 e820_mark_nosave_regions(max_low_pfn);
839
840#ifdef CONFIG_X86_32
841 request_resource(&iomem_resource, &video_ram_resource);
842#endif
843 reserve_standard_io_resources();
844
845 e820_setup_gap();
846
847#ifdef CONFIG_VT
848#if defined(CONFIG_VGA_CONSOLE)
849 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
850 conswitchp = &vga_con;
851#elif defined(CONFIG_DUMMY_CONSOLE)
852 conswitchp = &dummy_con;
853#endif
854#endif
855}
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-06 11:08:23 -0500