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-rw-r--r--arch/x86/kernel/setup.c924
1 files changed, 835 insertions, 89 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 6f80b852a196..b520dae02bf4 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1,139 +1,885 @@
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
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
5#include <linux/percpu.h> 67#include <linux/percpu.h>
6#include <asm/smp.h> 68#include <linux/crash_dump.h>
7#include <asm/percpu.h> 69
70#include <video/edid.h>
71
72#include <asm/mtrr.h>
73#include <asm/apic.h>
74#include <asm/e820.h>
75#include <asm/mpspec.h>
76#include <asm/setup.h>
77#include <asm/arch_hooks.h>
78#include <asm/efi.h>
8#include <asm/sections.h> 79#include <asm/sections.h>
80#include <asm/dmi.h>
81#include <asm/io_apic.h>
82#include <asm/ist.h>
83#include <asm/vmi.h>
84#include <setup_arch.h>
85#include <asm/bios_ebda.h>
86#include <asm/cacheflush.h>
9#include <asm/processor.h> 87#include <asm/processor.h>
10#include <asm/setup.h> 88#include <asm/bugs.h>
89
90#include <asm/system.h>
91#include <asm/vsyscall.h>
92#include <asm/smp.h>
93#include <asm/desc.h>
94#include <asm/dma.h>
95#include <asm/iommu.h>
96#include <asm/mmu_context.h>
97#include <asm/proto.h>
98
99#include <mach_apic.h>
100#include <asm/paravirt.h>
101
102#include <asm/percpu.h>
11#include <asm/topology.h> 103#include <asm/topology.h>
12#include <asm/mpspec.h>
13#include <asm/apicdef.h> 104#include <asm/apicdef.h>
105#ifdef CONFIG_X86_64
106#include <asm/numa_64.h>
107#endif
14 108
15#ifdef CONFIG_X86_LOCAL_APIC 109#ifndef ARCH_SETUP
16unsigned int num_processors; 110#define ARCH_SETUP
17unsigned disabled_cpus __cpuinitdata; 111#endif
18/* Processor that is doing the boot up */
19unsigned int boot_cpu_physical_apicid = -1U;
20EXPORT_SYMBOL(boot_cpu_physical_apicid);
21 112
22DEFINE_PER_CPU(u16, x86_cpu_to_apicid) = BAD_APICID; 113#ifndef CONFIG_DEBUG_BOOT_PARAMS
23EXPORT_PER_CPU_SYMBOL(x86_cpu_to_apicid); 114struct boot_params __initdata boot_params;
115#else
116struct boot_params boot_params;
117#endif
24 118
25/* Bitmask of physically existing CPUs */ 119/*
26physid_mask_t phys_cpu_present_map; 120 * Machine setup..
121 */
122static struct resource data_resource = {
123 .name = "Kernel data",
124 .start = 0,
125 .end = 0,
126 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
127};
128
129static struct resource code_resource = {
130 .name = "Kernel code",
131 .start = 0,
132 .end = 0,
133 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
134};
135
136static struct resource bss_resource = {
137 .name = "Kernel bss",
138 .start = 0,
139 .end = 0,
140 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
141};
142
143
144#ifdef CONFIG_X86_32
145/* This value is set up by the early boot code to point to the value
146 immediately after the boot time page tables. It contains a *physical*
147 address, and must not be in the .bss segment! */
148unsigned long init_pg_tables_start __initdata = ~0UL;
149unsigned long init_pg_tables_end __initdata = ~0UL;
150
151static struct resource video_ram_resource = {
152 .name = "Video RAM area",
153 .start = 0xa0000,
154 .end = 0xbffff,
155 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
156};
157
158/* cpu data as detected by the assembly code in head.S */
159struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1};
160/* common cpu data for all cpus */
161struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1};
162EXPORT_SYMBOL(boot_cpu_data);
163static void set_mca_bus(int x)
164{
165#ifdef CONFIG_MCA
166 MCA_bus = x;
167#endif
168}
169
170unsigned int def_to_bigsmp;
171
172/* for MCA, but anyone else can use it if they want */
173unsigned int machine_id;
174unsigned int machine_submodel_id;
175unsigned int BIOS_revision;
176
177struct apm_info apm_info;
178EXPORT_SYMBOL(apm_info);
179
180#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
181 defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
182struct ist_info ist_info;
183EXPORT_SYMBOL(ist_info);
184#else
185struct ist_info ist_info;
27#endif 186#endif
28 187
29#if defined(CONFIG_HAVE_SETUP_PER_CPU_AREA) && defined(CONFIG_X86_SMP) 188#else
189struct cpuinfo_x86 boot_cpu_data __read_mostly;
190EXPORT_SYMBOL(boot_cpu_data);
191#endif
192
193
194#if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
195unsigned long mmu_cr4_features;
196#else
197unsigned long mmu_cr4_features = X86_CR4_PAE;
198#endif
199
200/* Boot loader ID as an integer, for the benefit of proc_dointvec */
201int bootloader_type;
202
30/* 203/*
31 * Copy data used in early init routines from the initial arrays to the 204 * Early DMI memory
32 * per cpu data areas. These arrays then become expendable and the
33 * *_early_ptr's are zeroed indicating that the static arrays are gone.
34 */ 205 */
35static void __init setup_per_cpu_maps(void) 206int dmi_alloc_index;
207char dmi_alloc_data[DMI_MAX_DATA];
208
209/*
210 * Setup options
211 */
212struct screen_info screen_info;
213EXPORT_SYMBOL(screen_info);
214struct edid_info edid_info;
215EXPORT_SYMBOL_GPL(edid_info);
216
217extern int root_mountflags;
218
219unsigned long saved_video_mode;
220
221#define RAMDISK_IMAGE_START_MASK 0x07FF
222#define RAMDISK_PROMPT_FLAG 0x8000
223#define RAMDISK_LOAD_FLAG 0x4000
224
225static char __initdata command_line[COMMAND_LINE_SIZE];
226
227#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
228struct edd edd;
229#ifdef CONFIG_EDD_MODULE
230EXPORT_SYMBOL(edd);
231#endif
232/**
233 * copy_edd() - Copy the BIOS EDD information
234 * from boot_params into a safe place.
235 *
236 */
237static inline void copy_edd(void)
238{
239 memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
240 sizeof(edd.mbr_signature));
241 memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
242 edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
243 edd.edd_info_nr = boot_params.eddbuf_entries;
244}
245#else
246static inline void copy_edd(void)
247{
248}
249#endif
250
251#ifdef CONFIG_BLK_DEV_INITRD
252
253#ifdef CONFIG_X86_32
254
255#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
256static void __init relocate_initrd(void)
36{ 257{
37 int cpu;
38 258
39 for_each_possible_cpu(cpu) { 259 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
40 per_cpu(x86_cpu_to_apicid, cpu) = x86_cpu_to_apicid_init[cpu]; 260 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
41 per_cpu(x86_bios_cpu_apicid, cpu) = 261 u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
42 x86_bios_cpu_apicid_init[cpu]; 262 u64 ramdisk_here;
43#ifdef CONFIG_NUMA 263 unsigned long slop, clen, mapaddr;
44 per_cpu(x86_cpu_to_node_map, cpu) = 264 char *p, *q;
45 x86_cpu_to_node_map_init[cpu]; 265
266 /* We need to move the initrd down into lowmem */
267 ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size,
268 PAGE_SIZE);
269
270 if (ramdisk_here == -1ULL)
271 panic("Cannot find place for new RAMDISK of size %lld\n",
272 ramdisk_size);
273
274 /* Note: this includes all the lowmem currently occupied by
275 the initrd, we rely on that fact to keep the data intact. */
276 reserve_early(ramdisk_here, ramdisk_here + ramdisk_size,
277 "NEW RAMDISK");
278 initrd_start = ramdisk_here + PAGE_OFFSET;
279 initrd_end = initrd_start + ramdisk_size;
280 printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n",
281 ramdisk_here, ramdisk_here + ramdisk_size);
282
283 q = (char *)initrd_start;
284
285 /* Copy any lowmem portion of the initrd */
286 if (ramdisk_image < end_of_lowmem) {
287 clen = end_of_lowmem - ramdisk_image;
288 p = (char *)__va(ramdisk_image);
289 memcpy(q, p, clen);
290 q += clen;
291 ramdisk_image += clen;
292 ramdisk_size -= clen;
293 }
294
295 /* Copy the highmem portion of the initrd */
296 while (ramdisk_size) {
297 slop = ramdisk_image & ~PAGE_MASK;
298 clen = ramdisk_size;
299 if (clen > MAX_MAP_CHUNK-slop)
300 clen = MAX_MAP_CHUNK-slop;
301 mapaddr = ramdisk_image & PAGE_MASK;
302 p = early_ioremap(mapaddr, clen+slop);
303 memcpy(q, p+slop, clen);
304 early_iounmap(p, clen+slop);
305 q += clen;
306 ramdisk_image += clen;
307 ramdisk_size -= clen;
308 }
309 /* high pages is not converted by early_res_to_bootmem */
310 ramdisk_image = boot_params.hdr.ramdisk_image;
311 ramdisk_size = boot_params.hdr.ramdisk_size;
312 printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to"
313 " %08llx - %08llx\n",
314 ramdisk_image, ramdisk_image + ramdisk_size - 1,
315 ramdisk_here, ramdisk_here + ramdisk_size - 1);
316}
46#endif 317#endif
318
319static void __init reserve_initrd(void)
320{
321 u64 ramdisk_image = boot_params.hdr.ramdisk_image;
322 u64 ramdisk_size = boot_params.hdr.ramdisk_size;
323 u64 ramdisk_end = ramdisk_image + ramdisk_size;
324 u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
325
326 if (!boot_params.hdr.type_of_loader ||
327 !ramdisk_image || !ramdisk_size)
328 return; /* No initrd provided by bootloader */
329
330 initrd_start = 0;
331
332 if (ramdisk_size >= (end_of_lowmem>>1)) {
333 free_early(ramdisk_image, ramdisk_end);
334 printk(KERN_ERR "initrd too large to handle, "
335 "disabling initrd\n");
336 return;
337 }
338
339 printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image,
340 ramdisk_end);
341
342
343 if (ramdisk_end <= end_of_lowmem) {
344 /* All in lowmem, easy case */
345 /*
346 * don't need to reserve again, already reserved early
347 * in i386_start_kernel
348 */
349 initrd_start = ramdisk_image + PAGE_OFFSET;
350 initrd_end = initrd_start + ramdisk_size;
351 return;
47 } 352 }
48 353
49 /* indicate the early static arrays will soon be gone */ 354#ifdef CONFIG_X86_32
50 x86_cpu_to_apicid_early_ptr = NULL; 355 relocate_initrd();
51 x86_bios_cpu_apicid_early_ptr = NULL; 356#else
52#ifdef CONFIG_NUMA 357 printk(KERN_ERR "initrd extends beyond end of memory "
53 x86_cpu_to_node_map_early_ptr = NULL; 358 "(0x%08llx > 0x%08llx)\ndisabling initrd\n",
359 ramdisk_end, end_of_lowmem);
360 initrd_start = 0;
54#endif 361#endif
362 free_early(ramdisk_image, ramdisk_end);
55} 363}
364#else
365static void __init reserve_initrd(void)
366{
367}
368#endif /* CONFIG_BLK_DEV_INITRD */
369
370static void __init parse_setup_data(void)
371{
372 struct setup_data *data;
373 u64 pa_data;
374
375 if (boot_params.hdr.version < 0x0209)
376 return;
377 pa_data = boot_params.hdr.setup_data;
378 while (pa_data) {
379 data = early_ioremap(pa_data, PAGE_SIZE);
380 switch (data->type) {
381 case SETUP_E820_EXT:
382 parse_e820_ext(data, pa_data);
383 break;
384 default:
385 break;
386 }
387 pa_data = data->next;
388 early_iounmap(data, PAGE_SIZE);
389 }
390}
391
392static void __init e820_reserve_setup_data(void)
393{
394 struct setup_data *data;
395 u64 pa_data;
396 int found = 0;
397
398 if (boot_params.hdr.version < 0x0209)
399 return;
400 pa_data = boot_params.hdr.setup_data;
401 while (pa_data) {
402 data = early_ioremap(pa_data, sizeof(*data));
403 e820_update_range(pa_data, sizeof(*data)+data->len,
404 E820_RAM, E820_RESERVED_KERN);
405 found = 1;
406 pa_data = data->next;
407 early_iounmap(data, sizeof(*data));
408 }
409 if (!found)
410 return;
56 411
57#ifdef CONFIG_HAVE_CPUMASK_OF_CPU_MAP 412 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
58cpumask_t *cpumask_of_cpu_map __read_mostly; 413 memcpy(&e820_saved, &e820, sizeof(struct e820map));
59EXPORT_SYMBOL(cpumask_of_cpu_map); 414 printk(KERN_INFO "extended physical RAM map:\n");
415 e820_print_map("reserve setup_data");
416}
60 417
61/* requires nr_cpu_ids to be initialized */ 418static void __init reserve_early_setup_data(void)
62static void __init setup_cpumask_of_cpu(void)
63{ 419{
64 int i; 420 struct setup_data *data;
421 u64 pa_data;
422 char buf[32];
423
424 if (boot_params.hdr.version < 0x0209)
425 return;
426 pa_data = boot_params.hdr.setup_data;
427 while (pa_data) {
428 data = early_ioremap(pa_data, sizeof(*data));
429 sprintf(buf, "setup data %x", data->type);
430 reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
431 pa_data = data->next;
432 early_iounmap(data, sizeof(*data));
433 }
434}
435
436/*
437 * --------- Crashkernel reservation ------------------------------
438 */
439
440#ifdef CONFIG_KEXEC
441
442/**
443 * Reserve @size bytes of crashkernel memory at any suitable offset.
444 *
445 * @size: Size of the crashkernel memory to reserve.
446 * Returns the base address on success, and -1ULL on failure.
447 */
448unsigned long long find_and_reserve_crashkernel(unsigned long long size)
449{
450 const unsigned long long alignment = 16<<20; /* 16M */
451 unsigned long long start = 0LL;
452
453 while (1) {
454 int ret;
455
456 start = find_e820_area(start, ULONG_MAX, size, alignment);
457 if (start == -1ULL)
458 return start;
459
460 /* try to reserve it */
461 ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE);
462 if (ret >= 0)
463 return start;
65 464
66 /* alloc_bootmem zeroes memory */ 465 start += alignment;
67 cpumask_of_cpu_map = alloc_bootmem_low(sizeof(cpumask_t) * nr_cpu_ids); 466 }
68 for (i = 0; i < nr_cpu_ids; i++) 467}
69 cpu_set(i, cpumask_of_cpu_map[i]); 468
469static inline unsigned long long get_total_mem(void)
470{
471 unsigned long long total;
472
473 total = max_low_pfn - min_low_pfn;
474#ifdef CONFIG_HIGHMEM
475 total += highend_pfn - highstart_pfn;
476#endif
477
478 return total << PAGE_SHIFT;
479}
480
481static void __init reserve_crashkernel(void)
482{
483 unsigned long long total_mem;
484 unsigned long long crash_size, crash_base;
485 int ret;
486
487 total_mem = get_total_mem();
488
489 ret = parse_crashkernel(boot_command_line, total_mem,
490 &crash_size, &crash_base);
491 if (ret != 0 || crash_size <= 0)
492 return;
493
494 /* 0 means: find the address automatically */
495 if (crash_base <= 0) {
496 crash_base = find_and_reserve_crashkernel(crash_size);
497 if (crash_base == -1ULL) {
498 pr_info("crashkernel reservation failed. "
499 "No suitable area found.\n");
500 return;
501 }
502 } else {
503 ret = reserve_bootmem_generic(crash_base, crash_size,
504 BOOTMEM_EXCLUSIVE);
505 if (ret < 0) {
506 pr_info("crashkernel reservation failed - "
507 "memory is in use\n");
508 return;
509 }
510 }
511
512 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
513 "for crashkernel (System RAM: %ldMB)\n",
514 (unsigned long)(crash_size >> 20),
515 (unsigned long)(crash_base >> 20),
516 (unsigned long)(total_mem >> 20));
517
518 crashk_res.start = crash_base;
519 crashk_res.end = crash_base + crash_size - 1;
520 insert_resource(&iomem_resource, &crashk_res);
70} 521}
71#else 522#else
72static inline void setup_cpumask_of_cpu(void) { } 523static void __init reserve_crashkernel(void)
524{
525}
73#endif 526#endif
74 527
75#ifdef CONFIG_X86_32 528static struct resource standard_io_resources[] = {
76/* 529 { .name = "dma1", .start = 0x00, .end = 0x1f,
77 * Great future not-so-futuristic plan: make i386 and x86_64 do it 530 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
78 * the same way 531 { .name = "pic1", .start = 0x20, .end = 0x21,
532 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
533 { .name = "timer0", .start = 0x40, .end = 0x43,
534 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
535 { .name = "timer1", .start = 0x50, .end = 0x53,
536 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
537 { .name = "keyboard", .start = 0x60, .end = 0x60,
538 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
539 { .name = "keyboard", .start = 0x64, .end = 0x64,
540 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
541 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
542 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
543 { .name = "pic2", .start = 0xa0, .end = 0xa1,
544 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
545 { .name = "dma2", .start = 0xc0, .end = 0xdf,
546 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
547 { .name = "fpu", .start = 0xf0, .end = 0xff,
548 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
549};
550
551static void __init reserve_standard_io_resources(void)
552{
553 int i;
554
555 /* request I/O space for devices used on all i[345]86 PCs */
556 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
557 request_resource(&ioport_resource, &standard_io_resources[i]);
558
559}
560
561#ifdef CONFIG_PROC_VMCORE
562/* elfcorehdr= specifies the location of elf core header
563 * stored by the crashed kernel. This option will be passed
564 * by kexec loader to the capture kernel.
79 */ 565 */
80unsigned long __per_cpu_offset[NR_CPUS] __read_mostly; 566static int __init setup_elfcorehdr(char *arg)
81EXPORT_SYMBOL(__per_cpu_offset); 567{
568 char *end;
569 if (!arg)
570 return -EINVAL;
571 elfcorehdr_addr = memparse(arg, &end);
572 return end > arg ? 0 : -EINVAL;
573}
574early_param("elfcorehdr", setup_elfcorehdr);
82#endif 575#endif
83 576
577static struct x86_quirks default_x86_quirks __initdata;
578
579struct x86_quirks *x86_quirks __initdata = &default_x86_quirks;
580
581/*
582 * Determine if we were loaded by an EFI loader. If so, then we have also been
583 * passed the efi memmap, systab, etc., so we should use these data structures
584 * for initialization. Note, the efi init code path is determined by the
585 * global efi_enabled. This allows the same kernel image to be used on existing
586 * systems (with a traditional BIOS) as well as on EFI systems.
587 */
84/* 588/*
85 * Great future plan: 589 * setup_arch - architecture-specific boot-time initializations
86 * Declare PDA itself and support (irqstack,tss,pgd) as per cpu data. 590 *
87 * Always point %gs to its beginning 591 * Note: On x86_64, fixmaps are ready for use even before this is called.
88 */ 592 */
89void __init setup_per_cpu_areas(void) 593
594void __init setup_arch(char **cmdline_p)
90{ 595{
91 int i, highest_cpu = 0; 596#ifdef CONFIG_X86_32
92 unsigned long size; 597 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
598 visws_early_detect();
599 pre_setup_arch_hook();
600#else
601 printk(KERN_INFO "Command line: %s\n", boot_command_line);
602#endif
93 603
94#ifdef CONFIG_HOTPLUG_CPU 604 early_cpu_init();
95 prefill_possible_map(); 605 early_ioremap_init();
606
607 ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
608 screen_info = boot_params.screen_info;
609 edid_info = boot_params.edid_info;
610#ifdef CONFIG_X86_32
611 apm_info.bios = boot_params.apm_bios_info;
612 ist_info = boot_params.ist_info;
613 if (boot_params.sys_desc_table.length != 0) {
614 set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
615 machine_id = boot_params.sys_desc_table.table[0];
616 machine_submodel_id = boot_params.sys_desc_table.table[1];
617 BIOS_revision = boot_params.sys_desc_table.table[2];
618 }
619#endif
620 saved_video_mode = boot_params.hdr.vid_mode;
621 bootloader_type = boot_params.hdr.type_of_loader;
622
623#ifdef CONFIG_BLK_DEV_RAM
624 rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
625 rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
626 rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
627#endif
628#ifdef CONFIG_EFI
629 if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
630#ifdef CONFIG_X86_32
631 "EL32",
632#else
633 "EL64",
96#endif 634#endif
635 4)) {
636 efi_enabled = 1;
637 efi_reserve_early();
638 }
639#endif
640
641 ARCH_SETUP
642
643 setup_memory_map();
644 parse_setup_data();
645 /* update the e820_saved too */
646 e820_reserve_setup_data();
97 647
98 /* Copy section for each CPU (we discard the original) */ 648 copy_edd();
99 size = PERCPU_ENOUGH_ROOM;
100 printk(KERN_INFO "PERCPU: Allocating %lu bytes of per cpu data\n",
101 size);
102 649
103 for_each_possible_cpu(i) { 650 if (!boot_params.hdr.root_flags)
104 char *ptr; 651 root_mountflags &= ~MS_RDONLY;
105#ifndef CONFIG_NEED_MULTIPLE_NODES 652 init_mm.start_code = (unsigned long) _text;
106 ptr = alloc_bootmem_pages(size); 653 init_mm.end_code = (unsigned long) _etext;
654 init_mm.end_data = (unsigned long) _edata;
655#ifdef CONFIG_X86_32
656 init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
107#else 657#else
108 int node = early_cpu_to_node(i); 658 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 659#endif
117 if (!ptr) 660
118 panic("Cannot allocate cpu data for CPU %d\n", i); 661 code_resource.start = virt_to_phys(_text);
119#ifdef CONFIG_X86_64 662 code_resource.end = virt_to_phys(_etext)-1;
120 cpu_pda(i)->data_offset = ptr - __per_cpu_start; 663 data_resource.start = virt_to_phys(_etext);
664 data_resource.end = virt_to_phys(_edata)-1;
665 bss_resource.start = virt_to_phys(&__bss_start);
666 bss_resource.end = virt_to_phys(&__bss_stop)-1;
667
668 strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
669 *cmdline_p = command_line;
670
671 parse_early_param();
672
673 /* after early param, so could get panic from serial */
674 reserve_early_setup_data();
675
676 if (acpi_mps_check()) {
677#ifdef CONFIG_X86_LOCAL_APIC
678 disable_apic = 1;
679#endif
680 setup_clear_cpu_cap(X86_FEATURE_APIC);
681 }
682
683#ifdef CONFIG_PCI
684 if (pci_early_dump_regs)
685 early_dump_pci_devices();
686#endif
687
688 finish_e820_parsing();
689
690#ifdef CONFIG_X86_32
691 probe_roms();
692#endif
693
694 /* after parse_early_param, so could debug it */
695 insert_resource(&iomem_resource, &code_resource);
696 insert_resource(&iomem_resource, &data_resource);
697 insert_resource(&iomem_resource, &bss_resource);
698
699 if (efi_enabled)
700 efi_init();
701
702#ifdef CONFIG_X86_32
703 if (ppro_with_ram_bug()) {
704 e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
705 E820_RESERVED);
706 sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
707 printk(KERN_INFO "fixed physical RAM map:\n");
708 e820_print_map("bad_ppro");
709 }
710#else
711 early_gart_iommu_check();
712#endif
713
714 /*
715 * partially used pages are not usable - thus
716 * we are rounding upwards:
717 */
718 max_pfn = e820_end_of_ram_pfn();
719
720 /* preallocate 4k for mptable mpc */
721 early_reserve_e820_mpc_new();
722 /* update e820 for memory not covered by WB MTRRs */
723 mtrr_bp_init();
724 if (mtrr_trim_uncached_memory(max_pfn))
725 max_pfn = e820_end_of_ram_pfn();
726
727#ifdef CONFIG_X86_32
728 /* max_low_pfn get updated here */
729 find_low_pfn_range();
121#else 730#else
122 __per_cpu_offset[i] = ptr - __per_cpu_start; 731 num_physpages = max_pfn;
732
733 check_efer();
734
735 /* How many end-of-memory variables you have, grandma! */
736 /* need this before calling reserve_initrd */
737 if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
738 max_low_pfn = e820_end_of_low_ram_pfn();
739 else
740 max_low_pfn = max_pfn;
741
742 high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
123#endif 743#endif
124 memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
125 744
126 highest_cpu = i; 745 /* max_pfn_mapped is updated here */
746 max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
747 max_pfn_mapped = max_low_pfn_mapped;
748
749#ifdef CONFIG_X86_64
750 if (max_pfn > max_low_pfn) {
751 max_pfn_mapped = init_memory_mapping(1UL<<32,
752 max_pfn<<PAGE_SHIFT);
753 /* can we preseve max_low_pfn ?*/
754 max_low_pfn = max_pfn;
127 } 755 }
756#endif
128 757
129 nr_cpu_ids = highest_cpu + 1; 758 /*
130 printk(KERN_DEBUG "NR_CPUS: %d, nr_cpu_ids: %d\n", NR_CPUS, nr_cpu_ids); 759 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
760 */
131 761
132 /* Setup percpu data maps */ 762#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
133 setup_per_cpu_maps(); 763 if (init_ohci1394_dma_early)
764 init_ohci1394_dma_on_all_controllers();
765#endif
134 766
135 /* Setup cpumask_of_cpu map */ 767 reserve_initrd();
136 setup_cpumask_of_cpu(); 768
137} 769#ifdef CONFIG_X86_64
770 vsmp_init();
771#endif
772
773 dmi_scan_machine();
774
775 io_delay_init();
776
777 /*
778 * Parse the ACPI tables for possible boot-time SMP configuration.
779 */
780 acpi_boot_table_init();
781
782#ifdef CONFIG_ACPI_NUMA
783 /*
784 * Parse SRAT to discover nodes.
785 */
786 acpi_numa_init();
787#endif
788
789 initmem_init(0, max_pfn);
790
791#ifdef CONFIG_X86_64
792 dma32_reserve_bootmem();
793#endif
138 794
795#ifdef CONFIG_ACPI_SLEEP
796 /*
797 * Reserve low memory region for sleep support.
798 */
799 acpi_reserve_bootmem();
139#endif 800#endif
801#ifdef CONFIG_X86_FIND_SMP_CONFIG
802 /*
803 * Find and reserve possible boot-time SMP configuration:
804 */
805 find_smp_config();
806#endif
807 reserve_crashkernel();
808
809 reserve_ibft_region();
810
811#ifdef CONFIG_KVM_CLOCK
812 kvmclock_init();
813#endif
814
815#if defined(CONFIG_VMI) && defined(CONFIG_X86_32)
816 /*
817 * Must be after max_low_pfn is determined, and before kernel
818 * pagetables are setup.
819 */
820 vmi_init();
821#endif
822
823 paravirt_pagetable_setup_start(swapper_pg_dir);
824 paging_init();
825 paravirt_pagetable_setup_done(swapper_pg_dir);
826 paravirt_post_allocator_init();
827
828#ifdef CONFIG_X86_64
829 map_vsyscall();
830#endif
831
832#ifdef CONFIG_X86_GENERICARCH
833 generic_apic_probe();
834#endif
835
836 early_quirks();
837
838 /*
839 * Read APIC and some other early information from ACPI tables.
840 */
841 acpi_boot_init();
842
843#if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
844 /*
845 * get boot-time SMP configuration:
846 */
847 if (smp_found_config)
848 get_smp_config();
849#endif
850
851 prefill_possible_map();
852#ifdef CONFIG_X86_64
853 init_cpu_to_node();
854#endif
855
856 init_apic_mappings();
857 ioapic_init_mappings();
858
859#if defined(CONFIG_SMP) && defined(CONFIG_X86_PC) && defined(CONFIG_X86_32)
860 if (def_to_bigsmp)
861 printk(KERN_WARNING "More than 8 CPUs detected and "
862 "CONFIG_X86_PC cannot handle it.\nUse "
863 "CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP.\n");
864#endif
865 kvm_guest_init();
866
867 e820_reserve_resources();
868 e820_mark_nosave_regions(max_low_pfn);
869
870#ifdef CONFIG_X86_32
871 request_resource(&iomem_resource, &video_ram_resource);
872#endif
873 reserve_standard_io_resources();
874
875 e820_setup_gap();
876
877#ifdef CONFIG_VT
878#if defined(CONFIG_VGA_CONSOLE)
879 if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
880 conswitchp = &vga_con;
881#elif defined(CONFIG_DUMMY_CONSOLE)
882 conswitchp = &dummy_con;
883#endif
884#endif
885}
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-11 12:04:28 -0400