debuggers.hg

view linux-2.6-xen-sparse/arch/xen/x86_64/kernel/setup.c @ 6680:d0a4f770a5f4

phys_to_mach and mach_to_phys tables contain long entries, not
32-bit entries.

Signed-off-by: Keir Fraser <keir@xensource.com>
author kaf24@firebug.cl.cam.ac.uk
date Tue Sep 06 18:01:24 2005 +0000 (2005-09-06)
parents 1f460d0fd6c6
children 8db9c5873b9b
line source
1 /*
2 * linux/arch/x86-64/kernel/setup.c
3 *
4 * Copyright (C) 1995 Linus Torvalds
5 *
6 * Nov 2001 Dave Jones <davej@suse.de>
7 * Forked from i386 setup code.
8 *
9 * $Id$
10 */
12 /*
13 * This file handles the architecture-dependent parts of initialization
14 */
16 #include <linux/errno.h>
17 #include <linux/sched.h>
18 #include <linux/kernel.h>
19 #include <linux/mm.h>
20 #include <linux/stddef.h>
21 #include <linux/unistd.h>
22 #include <linux/ptrace.h>
23 #include <linux/slab.h>
24 #include <linux/user.h>
25 #include <linux/a.out.h>
26 #include <linux/tty.h>
27 #include <linux/ioport.h>
28 #include <linux/delay.h>
29 #include <linux/config.h>
30 #include <linux/init.h>
31 #include <linux/initrd.h>
32 #include <linux/highmem.h>
33 #include <linux/bootmem.h>
34 #include <linux/module.h>
35 #include <asm/processor.h>
36 #include <linux/console.h>
37 #include <linux/seq_file.h>
38 #include <linux/root_dev.h>
39 #include <linux/pci.h>
40 #include <linux/acpi.h>
41 #include <linux/kallsyms.h>
42 #include <linux/edd.h>
43 #include <asm/mtrr.h>
44 #include <asm/uaccess.h>
45 #include <asm/system.h>
46 #include <asm/io.h>
47 #include <asm/smp.h>
48 #include <asm/msr.h>
49 #include <asm/desc.h>
50 #include <video/edid.h>
51 #include <asm/e820.h>
52 #include <asm/dma.h>
53 #include <asm/mpspec.h>
54 #include <asm/mmu_context.h>
55 #include <asm/bootsetup.h>
56 #include <asm/proto.h>
57 #include <asm/setup.h>
58 #include <asm/mach_apic.h>
59 #include <asm/numa.h>
60 #ifdef CONFIG_XEN
61 #include <linux/percpu.h>
62 #include <asm-xen/xen-public/physdev.h>
63 #include "setup_arch_pre.h"
64 #include <asm-xen/hypervisor.h>
65 #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
66 #define PFN_PHYS(x) ((x) << PAGE_SHIFT)
67 #define end_pfn_map end_pfn
68 #include <asm/mach-xen/setup_arch_post.h>
70 extern unsigned long start_pfn;
71 extern struct edid_info edid_info;
73 shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page;
74 EXPORT_SYMBOL(HYPERVISOR_shared_info);
76 /* Allows setting of maximum possible memory size */
77 unsigned long xen_override_max_pfn;
79 unsigned long *phys_to_machine_mapping, *pfn_to_mfn_frame_list;
81 EXPORT_SYMBOL(phys_to_machine_mapping);
83 DEFINE_PER_CPU(multicall_entry_t, multicall_list[8]);
84 DEFINE_PER_CPU(int, nr_multicall_ents);
86 /* Raw start-of-day parameters from the hypervisor. */
87 start_info_t *xen_start_info;
88 #endif
90 /*
91 * Machine setup..
92 */
94 struct cpuinfo_x86 boot_cpu_data;
96 unsigned long mmu_cr4_features;
98 int acpi_disabled;
99 EXPORT_SYMBOL(acpi_disabled);
100 #ifdef CONFIG_ACPI_BOOT
101 extern int __initdata acpi_ht;
102 extern acpi_interrupt_flags acpi_sci_flags;
103 int __initdata acpi_force = 0;
104 #endif
106 int acpi_numa __initdata;
108 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
109 int bootloader_type;
111 unsigned long saved_video_mode;
113 #ifdef CONFIG_SWIOTLB
114 int swiotlb;
115 EXPORT_SYMBOL(swiotlb);
116 #endif
118 /*
119 * Setup options
120 */
121 struct drive_info_struct { char dummy[32]; } drive_info;
122 struct screen_info screen_info;
123 struct sys_desc_table_struct {
124 unsigned short length;
125 unsigned char table[0];
126 };
128 struct edid_info edid_info;
129 struct e820map e820;
131 extern int root_mountflags;
132 extern char _text, _etext, _edata, _end;
134 char command_line[COMMAND_LINE_SIZE];
136 struct resource standard_io_resources[] = {
137 { .name = "dma1", .start = 0x00, .end = 0x1f,
138 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
139 { .name = "pic1", .start = 0x20, .end = 0x21,
140 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
141 { .name = "timer0", .start = 0x40, .end = 0x43,
142 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
143 { .name = "timer1", .start = 0x50, .end = 0x53,
144 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
145 { .name = "keyboard", .start = 0x60, .end = 0x6f,
146 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
147 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
148 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
149 { .name = "pic2", .start = 0xa0, .end = 0xa1,
150 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
151 { .name = "dma2", .start = 0xc0, .end = 0xdf,
152 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
153 { .name = "fpu", .start = 0xf0, .end = 0xff,
154 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
155 };
157 #define STANDARD_IO_RESOURCES \
158 (sizeof standard_io_resources / sizeof standard_io_resources[0])
160 #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
162 struct resource data_resource = {
163 .name = "Kernel data",
164 .start = 0,
165 .end = 0,
166 .flags = IORESOURCE_RAM,
167 };
168 struct resource code_resource = {
169 .name = "Kernel code",
170 .start = 0,
171 .end = 0,
172 .flags = IORESOURCE_RAM,
173 };
175 #define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)
177 #if defined(CONFIG_XEN_PRIVILEGED_GUEST) || !defined(CONFIG_XEN)
178 static struct resource system_rom_resource = {
179 .name = "System ROM",
180 .start = 0xf0000,
181 .end = 0xfffff,
182 .flags = IORESOURCE_ROM,
183 };
185 static struct resource extension_rom_resource = {
186 .name = "Extension ROM",
187 .start = 0xe0000,
188 .end = 0xeffff,
189 .flags = IORESOURCE_ROM,
190 };
192 static struct resource adapter_rom_resources[] = {
193 { .name = "Adapter ROM", .start = 0xc8000, .end = 0,
194 .flags = IORESOURCE_ROM },
195 { .name = "Adapter ROM", .start = 0, .end = 0,
196 .flags = IORESOURCE_ROM },
197 { .name = "Adapter ROM", .start = 0, .end = 0,
198 .flags = IORESOURCE_ROM },
199 { .name = "Adapter ROM", .start = 0, .end = 0,
200 .flags = IORESOURCE_ROM },
201 { .name = "Adapter ROM", .start = 0, .end = 0,
202 .flags = IORESOURCE_ROM },
203 { .name = "Adapter ROM", .start = 0, .end = 0,
204 .flags = IORESOURCE_ROM }
205 };
206 #endif
208 #define ADAPTER_ROM_RESOURCES \
209 (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
211 #if defined(CONFIG_XEN_PRIVILEGED_GUEST) || !defined(CONFIG_XEN)
212 static struct resource video_rom_resource = {
213 .name = "Video ROM",
214 .start = 0xc0000,
215 .end = 0xc7fff,
216 .flags = IORESOURCE_ROM,
217 };
218 #endif
220 static struct resource video_ram_resource = {
221 .name = "Video RAM area",
222 .start = 0xa0000,
223 .end = 0xbffff,
224 .flags = IORESOURCE_RAM,
225 };
227 #if defined(CONFIG_XEN_PRIVILEGED_GUEST) || !defined(CONFIG_XEN)
228 #define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
230 static int __init romchecksum(unsigned char *rom, unsigned long length)
231 {
232 unsigned char *p, sum = 0;
234 for (p = rom; p < rom + length; p++)
235 sum += *p;
236 return sum == 0;
237 }
239 static void __init probe_roms(void)
240 {
241 unsigned long start, length, upper;
242 unsigned char *rom;
243 int i;
245 /* video rom */
246 upper = adapter_rom_resources[0].start;
247 for (start = video_rom_resource.start; start < upper; start += 2048) {
248 rom = isa_bus_to_virt(start);
249 if (!romsignature(rom))
250 continue;
252 video_rom_resource.start = start;
254 /* 0 < length <= 0x7f * 512, historically */
255 length = rom[2] * 512;
257 /* if checksum okay, trust length byte */
258 if (length && romchecksum(rom, length))
259 video_rom_resource.end = start + length - 1;
261 request_resource(&iomem_resource, &video_rom_resource);
262 break;
263 }
265 start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
266 if (start < upper)
267 start = upper;
269 /* system rom */
270 request_resource(&iomem_resource, &system_rom_resource);
271 upper = system_rom_resource.start;
273 /* check for extension rom (ignore length byte!) */
274 rom = isa_bus_to_virt(extension_rom_resource.start);
275 if (romsignature(rom)) {
276 length = extension_rom_resource.end - extension_rom_resource.start + 1;
277 if (romchecksum(rom, length)) {
278 request_resource(&iomem_resource, &extension_rom_resource);
279 upper = extension_rom_resource.start;
280 }
281 }
283 /* check for adapter roms on 2k boundaries */
284 for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
285 rom = isa_bus_to_virt(start);
286 if (!romsignature(rom))
287 continue;
289 /* 0 < length <= 0x7f * 512, historically */
290 length = rom[2] * 512;
292 /* but accept any length that fits if checksum okay */
293 if (!length || start + length > upper || !romchecksum(rom, length))
294 continue;
296 adapter_rom_resources[i].start = start;
297 adapter_rom_resources[i].end = start + length - 1;
298 request_resource(&iomem_resource, &adapter_rom_resources[i]);
300 start = adapter_rom_resources[i++].end & ~2047UL;
301 }
302 }
303 #endif
306 static __init void parse_cmdline_early (char ** cmdline_p)
307 {
308 char c = ' ', *to = command_line, *from = COMMAND_LINE;
309 int len = 0;
311 /* Save unparsed command line copy for /proc/cmdline */
312 #ifdef CONFIG_XEN
313 int max_cmdline;
315 if ((max_cmdline = MAX_GUEST_CMDLINE) > COMMAND_LINE_SIZE)
316 max_cmdline = COMMAND_LINE_SIZE;
317 memcpy(saved_command_line, xen_start_info->cmd_line, max_cmdline);
318 saved_command_line[max_cmdline-1] = '\0';
319 #else
320 memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
321 saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
322 #endif
324 for (;;) {
325 if (c != ' ')
326 goto next_char;
328 #ifdef CONFIG_SMP
329 /*
330 * If the BIOS enumerates physical processors before logical,
331 * maxcpus=N at enumeration-time can be used to disable HT.
332 */
333 else if (!memcmp(from, "maxcpus=", 8)) {
334 extern unsigned int maxcpus;
336 maxcpus = simple_strtoul(from + 8, NULL, 0);
337 }
338 #endif
339 #ifdef CONFIG_ACPI_BOOT
340 /* "acpi=off" disables both ACPI table parsing and interpreter init */
341 if (!memcmp(from, "acpi=off", 8))
342 disable_acpi();
344 if (!memcmp(from, "acpi=force", 10)) {
345 /* add later when we do DMI horrors: */
346 acpi_force = 1;
347 acpi_disabled = 0;
348 }
350 /* acpi=ht just means: do ACPI MADT parsing
351 at bootup, but don't enable the full ACPI interpreter */
352 if (!memcmp(from, "acpi=ht", 7)) {
353 if (!acpi_force)
354 disable_acpi();
355 acpi_ht = 1;
356 }
357 else if (!memcmp(from, "pci=noacpi", 10))
358 acpi_disable_pci();
359 else if (!memcmp(from, "acpi=noirq", 10))
360 acpi_noirq_set();
362 else if (!memcmp(from, "acpi_sci=edge", 13))
363 acpi_sci_flags.trigger = 1;
364 else if (!memcmp(from, "acpi_sci=level", 14))
365 acpi_sci_flags.trigger = 3;
366 else if (!memcmp(from, "acpi_sci=high", 13))
367 acpi_sci_flags.polarity = 1;
368 else if (!memcmp(from, "acpi_sci=low", 12))
369 acpi_sci_flags.polarity = 3;
371 /* acpi=strict disables out-of-spec workarounds */
372 else if (!memcmp(from, "acpi=strict", 11)) {
373 acpi_strict = 1;
374 }
375 #ifdef CONFIG_X86_IO_APIC
376 else if (!memcmp(from, "acpi_skip_timer_override", 24))
377 acpi_skip_timer_override = 1;
378 #endif
379 #endif
380 #ifndef CONFIG_XEN
381 if (!memcmp(from, "nolapic", 7) ||
382 !memcmp(from, "disableapic", 11))
383 disable_apic = 1;
385 if (!memcmp(from, "noapic", 6))
386 skip_ioapic_setup = 1;
388 if (!memcmp(from, "apic", 4)) {
389 skip_ioapic_setup = 0;
390 ioapic_force = 1;
391 }
392 #endif
393 if (!memcmp(from, "mem=", 4))
394 parse_memopt(from+4, &from);
396 #ifdef CONFIG_DISCONTIGMEM
397 if (!memcmp(from, "numa=", 5))
398 numa_setup(from+5);
399 #endif
401 #ifdef CONFIG_GART_IOMMU
402 if (!memcmp(from,"iommu=",6)) {
403 iommu_setup(from+6);
404 }
405 #endif
407 if (!memcmp(from,"oops=panic", 10))
408 panic_on_oops = 1;
410 if (!memcmp(from, "noexec=", 7))
411 nonx_setup(from + 7);
413 next_char:
414 c = *(from++);
415 if (!c)
416 break;
417 if (COMMAND_LINE_SIZE <= ++len)
418 break;
419 *(to++) = c;
420 }
421 *to = '\0';
422 *cmdline_p = command_line;
423 }
425 #ifndef CONFIG_DISCONTIGMEM
426 #ifdef CONFIG_XEN
427 static void __init contig_initmem_init(void)
428 {
429 unsigned long bootmap_size = init_bootmem(start_pfn, end_pfn);
430 free_bootmem(0, end_pfn << PAGE_SHIFT);
431 reserve_bootmem(HIGH_MEMORY,
432 (PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE-1)
433 - HIGH_MEMORY);
434 }
435 #else
436 static void __init contig_initmem_init(void)
437 {
438 unsigned long bootmap_size, bootmap;
439 bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
440 bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
441 if (bootmap == -1L)
442 panic("Cannot find bootmem map of size %ld\n",bootmap_size);
443 bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
444 e820_bootmem_free(&contig_page_data, 0, end_pfn << PAGE_SHIFT);
445 reserve_bootmem(bootmap, bootmap_size);
446 }
447 #endif /* !CONFIG_XEN */
448 #endif
450 /* Use inline assembly to define this because the nops are defined
451 as inline assembly strings in the include files and we cannot
452 get them easily into strings. */
453 asm("\t.data\nk8nops: "
454 K8_NOP1 K8_NOP2 K8_NOP3 K8_NOP4 K8_NOP5 K8_NOP6
455 K8_NOP7 K8_NOP8);
457 extern unsigned char k8nops[];
458 static unsigned char *k8_nops[ASM_NOP_MAX+1] = {
459 NULL,
460 k8nops,
461 k8nops + 1,
462 k8nops + 1 + 2,
463 k8nops + 1 + 2 + 3,
464 k8nops + 1 + 2 + 3 + 4,
465 k8nops + 1 + 2 + 3 + 4 + 5,
466 k8nops + 1 + 2 + 3 + 4 + 5 + 6,
467 k8nops + 1 + 2 + 3 + 4 + 5 + 6 + 7,
468 };
470 /* Replace instructions with better alternatives for this CPU type.
472 This runs before SMP is initialized to avoid SMP problems with
473 self modifying code. This implies that assymetric systems where
474 APs have less capabilities than the boot processor are not handled.
475 In this case boot with "noreplacement". */
476 void apply_alternatives(void *start, void *end)
477 {
478 struct alt_instr *a;
479 int diff, i, k;
480 for (a = start; (void *)a < end; a++) {
481 if (!boot_cpu_has(a->cpuid))
482 continue;
484 BUG_ON(a->replacementlen > a->instrlen);
485 __inline_memcpy(a->instr, a->replacement, a->replacementlen);
486 diff = a->instrlen - a->replacementlen;
488 /* Pad the rest with nops */
489 for (i = a->replacementlen; diff > 0; diff -= k, i += k) {
490 k = diff;
491 if (k > ASM_NOP_MAX)
492 k = ASM_NOP_MAX;
493 __inline_memcpy(a->instr + i, k8_nops[k], k);
494 }
495 }
496 }
498 static int no_replacement __initdata = 0;
500 void __init alternative_instructions(void)
501 {
502 extern struct alt_instr __alt_instructions[], __alt_instructions_end[];
503 if (no_replacement)
504 return;
505 apply_alternatives(__alt_instructions, __alt_instructions_end);
506 }
508 static int __init noreplacement_setup(char *s)
509 {
510 no_replacement = 1;
511 return 0;
512 }
514 __setup("noreplacement", noreplacement_setup);
516 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
517 struct edd edd;
518 #ifdef CONFIG_EDD_MODULE
519 EXPORT_SYMBOL(edd);
520 #endif
521 /**
522 * copy_edd() - Copy the BIOS EDD information
523 * from boot_params into a safe place.
524 *
525 */
526 static inline void copy_edd(void)
527 {
528 memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
529 memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
530 edd.mbr_signature_nr = EDD_MBR_SIG_NR;
531 edd.edd_info_nr = EDD_NR;
532 }
533 #else
534 static inline void copy_edd(void)
535 {
536 }
537 #endif
539 #ifndef CONFIG_XEN
540 #define EBDA_ADDR_POINTER 0x40E
541 static void __init reserve_ebda_region(void)
542 {
543 unsigned int addr;
544 /**
545 * there is a real-mode segmented pointer pointing to the
546 * 4K EBDA area at 0x40E
547 */
548 addr = *(unsigned short *)phys_to_virt(EBDA_ADDR_POINTER);
549 addr <<= 4;
550 if (addr)
551 reserve_bootmem_generic(addr, PAGE_SIZE);
552 }
553 #endif
555 void __init setup_arch(char **cmdline_p)
556 {
557 unsigned long kernel_end;
559 #ifdef CONFIG_XEN
560 ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
561 drive_info = DRIVE_INFO;
562 kernel_end = 0; /* dummy */
563 #ifdef CONFIG_XEN_PHYSDEV_ACCESS
564 screen_info = SCREEN_INFO;
566 /* This is drawn from a dump from vgacon:startup in standard Linux. */
567 screen_info.orig_video_mode = 3;
568 screen_info.orig_video_isVGA = 1;
569 screen_info.orig_video_lines = 25;
570 screen_info.orig_video_cols = 80;
571 screen_info.orig_video_ega_bx = 3;
572 screen_info.orig_video_points = 16;
573 #endif
574 edid_info = EDID_INFO;
575 saved_video_mode = SAVED_VIDEO_MODE;
576 bootloader_type = LOADER_TYPE;
578 #ifdef CONFIG_BLK_DEV_RAM
579 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
580 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
581 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
584 #endif
586 HYPERVISOR_vm_assist(VMASST_CMD_enable,
587 VMASST_TYPE_writable_pagetables);
589 ARCH_SETUP
590 #else
591 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
592 drive_info = DRIVE_INFO;
593 screen_info = SCREEN_INFO;
594 edid_info = EDID_INFO;
595 saved_video_mode = SAVED_VIDEO_MODE;
596 bootloader_type = LOADER_TYPE;
598 #ifdef CONFIG_BLK_DEV_RAM
599 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
600 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
601 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
602 #endif
603 setup_memory_region();
604 copy_edd();
605 #endif /* !CONFIG_XEN */
607 if (!MOUNT_ROOT_RDONLY)
608 root_mountflags &= ~MS_RDONLY;
609 init_mm.start_code = (unsigned long) &_text;
610 init_mm.end_code = (unsigned long) &_etext;
611 init_mm.end_data = (unsigned long) &_edata;
612 #ifdef CONFIG_XEN
613 init_mm.brk = start_pfn << PAGE_SHIFT;
614 #else
615 init_mm.brk = (unsigned long) &_end;
617 code_resource.start = virt_to_phys(&_text);
618 code_resource.end = virt_to_phys(&_etext)-1;
619 data_resource.start = virt_to_phys(&_etext);
620 data_resource.end = virt_to_phys(&_edata)-1;
621 #endif
623 parse_cmdline_early(cmdline_p);
625 early_identify_cpu(&boot_cpu_data);
627 /*
628 * partially used pages are not usable - thus
629 * we are rounding upwards:
630 */
631 end_pfn = e820_end_of_ram();
633 check_efer();
635 init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
637 #ifdef CONFIG_ACPI_NUMA
638 /*
639 * Parse SRAT to discover nodes.
640 */
641 acpi_numa_init();
642 #endif
644 #ifdef CONFIG_DISCONTIGMEM
645 numa_initmem_init(0, end_pfn);
646 #else
647 contig_initmem_init();
648 #endif
650 #ifndef CONFIG_XEN
651 /* Reserve direct mapping */
652 reserve_bootmem_generic(table_start << PAGE_SHIFT,
653 (table_end - table_start) << PAGE_SHIFT);
655 /* reserve kernel */
656 kernel_end = round_up(__pa_symbol(&_end),PAGE_SIZE);
657 reserve_bootmem_generic(HIGH_MEMORY, kernel_end - HIGH_MEMORY);
659 /*
660 * reserve physical page 0 - it's a special BIOS page on many boxes,
661 * enabling clean reboots, SMP operation, laptop functions.
662 */
663 reserve_bootmem_generic(0, PAGE_SIZE);
665 /* reserve ebda region */
666 reserve_ebda_region();
667 #endif
670 #ifdef CONFIG_SMP
671 /*
672 * But first pinch a few for the stack/trampoline stuff
673 * FIXME: Don't need the extra page at 4K, but need to fix
674 * trampoline before removing it. (see the GDT stuff)
675 */
676 reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);
678 /* Reserve SMP trampoline */
679 reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
680 #endif
682 #ifdef CONFIG_ACPI_SLEEP
683 /*
684 * Reserve low memory region for sleep support.
685 */
686 acpi_reserve_bootmem();
687 #endif
688 #ifdef CONFIG_XEN
689 #ifdef CONFIG_BLK_DEV_INITRD
690 if (xen_start_info->mod_start) {
691 if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
692 /*reserve_bootmem_generic(INITRD_START, INITRD_SIZE);*/
693 initrd_start = INITRD_START + PAGE_OFFSET;
694 initrd_end = initrd_start+INITRD_SIZE;
695 initrd_below_start_ok = 1;
696 } else {
697 printk(KERN_ERR "initrd extends beyond end of memory "
698 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
699 (unsigned long)(INITRD_START + INITRD_SIZE),
700 (unsigned long)(end_pfn << PAGE_SHIFT));
701 initrd_start = 0;
702 }
703 }
704 #endif
705 #else /* CONFIG_XEN */
706 #ifdef CONFIG_BLK_DEV_INITRD
707 if (LOADER_TYPE && INITRD_START) {
708 if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
709 reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
710 initrd_start =
711 INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
712 initrd_end = initrd_start+INITRD_SIZE;
713 }
714 else {
715 printk(KERN_ERR "initrd extends beyond end of memory "
716 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
717 (unsigned long)(INITRD_START + INITRD_SIZE),
718 (unsigned long)(end_pfn << PAGE_SHIFT));
719 initrd_start = 0;
720 }
721 }
722 #endif
723 #endif /* !CONFIG_XEN */
724 paging_init();
725 #ifdef CONFIG_X86_LOCAL_APIC
726 /*
727 * Find and reserve possible boot-time SMP configuration:
728 */
729 find_smp_config();
730 #endif
731 #ifdef CONFIG_XEN
732 {
733 int i, j;
734 /* Make sure we have a large enough P->M table. */
735 if (end_pfn > xen_start_info->nr_pages) {
736 phys_to_machine_mapping = alloc_bootmem(
737 end_pfn * sizeof(unsigned long));
738 memset(phys_to_machine_mapping, ~0,
739 end_pfn * sizeof(unsigned long));
740 memcpy(phys_to_machine_mapping,
741 (unsigned long *)xen_start_info->mfn_list,
742 xen_start_info->nr_pages * sizeof(unsigned long));
743 free_bootmem(
744 __pa(xen_start_info->mfn_list),
745 PFN_PHYS(PFN_UP(xen_start_info->nr_pages *
746 sizeof(unsigned long))));
747 }
749 pfn_to_mfn_frame_list = alloc_bootmem(PAGE_SIZE);
751 for ( i=0, j=0; i < end_pfn; i+=(PAGE_SIZE/sizeof(unsigned long)), j++ )
752 pfn_to_mfn_frame_list[j] =
753 virt_to_mfn(&phys_to_machine_mapping[i]);
754 }
755 #endif
757 #ifndef CONFIG_XEN
758 check_ioapic();
759 #endif
761 #ifdef CONFIG_ACPI_BOOT
762 /*
763 * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
764 * Call this early for SRAT node setup.
765 */
766 acpi_boot_table_init();
768 /*
769 * Read APIC and some other early information from ACPI tables.
770 */
771 acpi_boot_init();
772 #endif
774 #ifdef CONFIG_X86_LOCAL_APIC
775 /*
776 * get boot-time SMP configuration:
777 */
778 if (smp_found_config)
779 get_smp_config();
780 #ifndef CONFIG_XEN
781 init_apic_mappings();
782 #endif
783 #endif
785 #if defined(CONFIG_XEN_PRIVILEGED_GUEST) || !defined(CONFIG_XEN)
786 /*
787 * Request address space for all standard RAM and ROM resources
788 * and also for regions reported as reserved by the e820.
789 */
790 probe_roms();
791 e820_reserve_resources();
792 #endif
794 request_resource(&iomem_resource, &video_ram_resource);
796 {
797 unsigned i;
798 /* request I/O space for devices used on all i[345]86 PCs */
799 for (i = 0; i < STANDARD_IO_RESOURCES; i++)
800 request_resource(&ioport_resource, &standard_io_resources[i]);
801 }
803 e820_setup_gap();
805 #ifdef CONFIG_GART_IOMMU
806 iommu_hole_init();
807 #endif
809 #ifdef CONFIG_XEN
810 {
811 physdev_op_t op;
813 op.cmd = PHYSDEVOP_SET_IOPL;
814 op.u.set_iopl.iopl = 1;
815 HYPERVISOR_physdev_op(&op);
817 if (xen_start_info->flags & SIF_INITDOMAIN) {
818 if (!(xen_start_info->flags & SIF_PRIVILEGED))
819 panic("Xen granted us console access "
820 "but not privileged status");
822 #ifdef CONFIG_VT
823 #if defined(CONFIG_VGA_CONSOLE)
824 conswitchp = &vga_con;
825 #elif defined(CONFIG_DUMMY_CONSOLE)
826 conswitchp = &dummy_con;
827 #endif
828 #endif
829 } else {
830 #ifdef CONFIG_XEN_PRIVILEGED_GUEST
831 extern const struct consw xennull_con;
832 extern int console_use_vt;
833 #if defined(CONFIG_VGA_CONSOLE)
834 /* disable VGA driver */
835 ORIG_VIDEO_ISVGA = VIDEO_TYPE_VLFB;
836 #endif
837 conswitchp = &xennull_con;
838 console_use_vt = 0;
839 #endif
840 }
841 }
842 #else /* CONFIG_XEN */
844 #ifdef CONFIG_VT
845 #if defined(CONFIG_VGA_CONSOLE)
846 conswitchp = &vga_con;
847 #elif defined(CONFIG_DUMMY_CONSOLE)
848 conswitchp = &dummy_con;
849 #endif
850 #endif
852 #endif /* !CONFIG_XEN */
853 }
855 static int __init get_model_name(struct cpuinfo_x86 *c)
856 {
857 unsigned int *v;
859 if (c->extended_cpuid_level < 0x80000004)
860 return 0;
862 v = (unsigned int *) c->x86_model_id;
863 cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
864 cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
865 cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
866 c->x86_model_id[48] = 0;
867 return 1;
868 }
871 static void __init display_cacheinfo(struct cpuinfo_x86 *c)
872 {
873 unsigned int n, dummy, eax, ebx, ecx, edx;
875 n = c->extended_cpuid_level;
877 if (n >= 0x80000005) {
878 cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
879 printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
880 edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
881 c->x86_cache_size=(ecx>>24)+(edx>>24);
882 /* On K8 L1 TLB is inclusive, so don't count it */
883 c->x86_tlbsize = 0;
884 }
886 if (n >= 0x80000006) {
887 cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
888 ecx = cpuid_ecx(0x80000006);
889 c->x86_cache_size = ecx >> 16;
890 c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
892 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
893 c->x86_cache_size, ecx & 0xFF);
894 }
896 if (n >= 0x80000007)
897 cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power);
898 if (n >= 0x80000008) {
899 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
900 c->x86_virt_bits = (eax >> 8) & 0xff;
901 c->x86_phys_bits = eax & 0xff;
902 }
903 }
905 /*
906 * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
907 * Assumes number of cores is a power of two.
908 */
909 static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
910 {
911 #ifdef CONFIG_SMP
912 int cpu = smp_processor_id();
913 int node = 0;
914 unsigned bits;
915 if (c->x86_num_cores == 1)
916 return;
918 bits = 0;
919 while ((1 << bits) < c->x86_num_cores)
920 bits++;
922 /* Low order bits define the core id (index of core in socket) */
923 cpu_core_id[cpu] = phys_proc_id[cpu] & ((1 << bits)-1);
924 /* Convert the APIC ID into the socket ID */
925 phys_proc_id[cpu] >>= bits;
927 #ifdef CONFIG_NUMA
928 /* When an ACPI SRAT table is available use the mappings from SRAT
929 instead. */
930 if (acpi_numa <= 0) {
931 node = phys_proc_id[cpu];
932 if (!node_online(node))
933 node = first_node(node_online_map);
934 cpu_to_node[cpu] = node;
935 } else {
936 node = cpu_to_node[cpu];
937 }
938 #endif
940 printk(KERN_INFO "CPU %d(%d) -> Node %d -> Core %d\n",
941 cpu, c->x86_num_cores, node, cpu_core_id[cpu]);
942 #endif
943 }
945 static int __init init_amd(struct cpuinfo_x86 *c)
946 {
947 int r;
948 int level;
950 /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
951 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
952 clear_bit(0*32+31, &c->x86_capability);
954 /* C-stepping K8? */
955 level = cpuid_eax(1);
956 if ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58)
957 set_bit(X86_FEATURE_K8_C, &c->x86_capability);
959 r = get_model_name(c);
960 if (!r) {
961 switch (c->x86) {
962 case 15:
963 /* Should distinguish Models here, but this is only
964 a fallback anyways. */
965 strcpy(c->x86_model_id, "Hammer");
966 break;
967 }
968 }
969 display_cacheinfo(c);
971 if (c->extended_cpuid_level >= 0x80000008) {
972 c->x86_num_cores = (cpuid_ecx(0x80000008) & 0xff) + 1;
973 if (c->x86_num_cores & (c->x86_num_cores - 1))
974 c->x86_num_cores = 1;
976 amd_detect_cmp(c);
977 }
979 return r;
980 }
982 static void __init detect_ht(struct cpuinfo_x86 *c)
983 {
984 #ifdef CONFIG_SMP
985 u32 eax, ebx, ecx, edx;
986 int index_msb, tmp;
987 int cpu = smp_processor_id();
989 if (!cpu_has(c, X86_FEATURE_HT) || cpu_has(c, X86_FEATURE_CMP_LEGACY))
990 return;
992 cpuid(1, &eax, &ebx, &ecx, &edx);
993 smp_num_siblings = (ebx & 0xff0000) >> 16;
995 if (smp_num_siblings == 1) {
996 printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
997 } else if (smp_num_siblings > 1) {
998 index_msb = 31;
999 /*
1000 * At this point we only support two siblings per
1001 * processor package.
1002 */
1003 if (smp_num_siblings > NR_CPUS) {
1004 printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
1005 smp_num_siblings = 1;
1006 return;
1008 tmp = smp_num_siblings;
1009 while ((tmp & 0x80000000 ) == 0) {
1010 tmp <<=1 ;
1011 index_msb--;
1013 if (smp_num_siblings & (smp_num_siblings - 1))
1014 index_msb++;
1015 phys_proc_id[cpu] = phys_pkg_id(index_msb);
1017 printk(KERN_INFO "CPU: Physical Processor ID: %d\n",
1018 phys_proc_id[cpu]);
1020 smp_num_siblings = smp_num_siblings / c->x86_num_cores;
1022 tmp = smp_num_siblings;
1023 index_msb = 31;
1024 while ((tmp & 0x80000000) == 0) {
1025 tmp <<=1 ;
1026 index_msb--;
1028 if (smp_num_siblings & (smp_num_siblings - 1))
1029 index_msb++;
1031 cpu_core_id[cpu] = phys_pkg_id(index_msb);
1033 if (c->x86_num_cores > 1)
1034 printk(KERN_INFO "CPU: Processor Core ID: %d\n",
1035 cpu_core_id[cpu]);
1037 #endif
1040 /*
1041 * find out the number of processor cores on the die
1042 */
1043 static int __init intel_num_cpu_cores(struct cpuinfo_x86 *c)
1045 unsigned int eax;
1047 if (c->cpuid_level < 4)
1048 return 1;
1050 __asm__("cpuid"
1051 : "=a" (eax)
1052 : "0" (4), "c" (0)
1053 : "bx", "dx");
1055 if (eax & 0x1f)
1056 return ((eax >> 26) + 1);
1057 else
1058 return 1;
1061 static void __init init_intel(struct cpuinfo_x86 *c)
1063 /* Cache sizes */
1064 unsigned n;
1066 init_intel_cacheinfo(c);
1067 n = c->extended_cpuid_level;
1068 if (n >= 0x80000008) {
1069 unsigned eax = cpuid_eax(0x80000008);
1070 c->x86_virt_bits = (eax >> 8) & 0xff;
1071 c->x86_phys_bits = eax & 0xff;
1074 if (c->x86 == 15)
1075 c->x86_cache_alignment = c->x86_clflush_size * 2;
1076 if (c->x86 >= 15)
1077 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
1078 c->x86_num_cores = intel_num_cpu_cores(c);
1081 void __init get_cpu_vendor(struct cpuinfo_x86 *c)
1083 char *v = c->x86_vendor_id;
1085 if (!strcmp(v, "AuthenticAMD"))
1086 c->x86_vendor = X86_VENDOR_AMD;
1087 else if (!strcmp(v, "GenuineIntel"))
1088 c->x86_vendor = X86_VENDOR_INTEL;
1089 else
1090 c->x86_vendor = X86_VENDOR_UNKNOWN;
1093 struct cpu_model_info {
1094 int vendor;
1095 int family;
1096 char *model_names[16];
1097 };
1099 /* Do some early cpuid on the boot CPU to get some parameter that are
1100 needed before check_bugs. Everything advanced is in identify_cpu
1101 below. */
1102 void __init early_identify_cpu(struct cpuinfo_x86 *c)
1104 u32 tfms;
1106 c->loops_per_jiffy = loops_per_jiffy;
1107 c->x86_cache_size = -1;
1108 c->x86_vendor = X86_VENDOR_UNKNOWN;
1109 c->x86_model = c->x86_mask = 0; /* So far unknown... */
1110 c->x86_vendor_id[0] = '\0'; /* Unset */
1111 c->x86_model_id[0] = '\0'; /* Unset */
1112 c->x86_clflush_size = 64;
1113 c->x86_cache_alignment = c->x86_clflush_size;
1114 c->x86_num_cores = 1;
1115 c->extended_cpuid_level = 0;
1116 memset(&c->x86_capability, 0, sizeof c->x86_capability);
1118 /* Get vendor name */
1119 cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
1120 (unsigned int *)&c->x86_vendor_id[0],
1121 (unsigned int *)&c->x86_vendor_id[8],
1122 (unsigned int *)&c->x86_vendor_id[4]);
1124 get_cpu_vendor(c);
1126 /* Initialize the standard set of capabilities */
1127 /* Note that the vendor-specific code below might override */
1129 /* Intel-defined flags: level 0x00000001 */
1130 if (c->cpuid_level >= 0x00000001) {
1131 __u32 misc;
1132 cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
1133 &c->x86_capability[0]);
1134 c->x86 = (tfms >> 8) & 0xf;
1135 c->x86_model = (tfms >> 4) & 0xf;
1136 c->x86_mask = tfms & 0xf;
1137 if (c->x86 == 0xf) {
1138 c->x86 += (tfms >> 20) & 0xff;
1139 c->x86_model += ((tfms >> 16) & 0xF) << 4;
1141 if (c->x86_capability[0] & (1<<19))
1142 c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
1143 } else {
1144 /* Have CPUID level 0 only - unheard of */
1145 c->x86 = 4;
1148 #ifdef CONFIG_SMP
1149 phys_proc_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff;
1150 #endif
1153 /*
1154 * This does the hard work of actually picking apart the CPU stuff...
1155 */
1156 void __init identify_cpu(struct cpuinfo_x86 *c)
1158 int i;
1159 u32 xlvl;
1161 early_identify_cpu(c);
1163 /* AMD-defined flags: level 0x80000001 */
1164 xlvl = cpuid_eax(0x80000000);
1165 c->extended_cpuid_level = xlvl;
1166 if ((xlvl & 0xffff0000) == 0x80000000) {
1167 if (xlvl >= 0x80000001) {
1168 c->x86_capability[1] = cpuid_edx(0x80000001);
1169 c->x86_capability[6] = cpuid_ecx(0x80000001);
1171 if (xlvl >= 0x80000004)
1172 get_model_name(c); /* Default name */
1175 /* Transmeta-defined flags: level 0x80860001 */
1176 xlvl = cpuid_eax(0x80860000);
1177 if ((xlvl & 0xffff0000) == 0x80860000) {
1178 /* Don't set x86_cpuid_level here for now to not confuse. */
1179 if (xlvl >= 0x80860001)
1180 c->x86_capability[2] = cpuid_edx(0x80860001);
1183 /*
1184 * Vendor-specific initialization. In this section we
1185 * canonicalize the feature flags, meaning if there are
1186 * features a certain CPU supports which CPUID doesn't
1187 * tell us, CPUID claiming incorrect flags, or other bugs,
1188 * we handle them here.
1190 * At the end of this section, c->x86_capability better
1191 * indicate the features this CPU genuinely supports!
1192 */
1193 switch (c->x86_vendor) {
1194 case X86_VENDOR_AMD:
1195 init_amd(c);
1196 break;
1198 case X86_VENDOR_INTEL:
1199 init_intel(c);
1200 break;
1202 case X86_VENDOR_UNKNOWN:
1203 default:
1204 display_cacheinfo(c);
1205 break;
1208 select_idle_routine(c);
1209 detect_ht(c);
1211 /*
1212 * On SMP, boot_cpu_data holds the common feature set between
1213 * all CPUs; so make sure that we indicate which features are
1214 * common between the CPUs. The first time this routine gets
1215 * executed, c == &boot_cpu_data.
1216 */
1217 if (c != &boot_cpu_data) {
1218 /* AND the already accumulated flags with these */
1219 for (i = 0 ; i < NCAPINTS ; i++)
1220 boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
1223 #ifdef CONFIG_X86_MCE
1224 mcheck_init(c);
1225 #endif
1226 #ifdef CONFIG_NUMA
1227 if (c != &boot_cpu_data)
1228 numa_add_cpu(c - cpu_data);
1229 #endif
1233 void __init print_cpu_info(struct cpuinfo_x86 *c)
1235 if (c->x86_model_id[0])
1236 printk("%s", c->x86_model_id);
1238 if (c->x86_mask || c->cpuid_level >= 0)
1239 printk(" stepping %02x\n", c->x86_mask);
1240 else
1241 printk("\n");
1244 /*
1245 * Get CPU information for use by the procfs.
1246 */
1248 static int show_cpuinfo(struct seq_file *m, void *v)
1250 struct cpuinfo_x86 *c = v;
1252 /*
1253 * These flag bits must match the definitions in <asm/cpufeature.h>.
1254 * NULL means this bit is undefined or reserved; either way it doesn't
1255 * have meaning as far as Linux is concerned. Note that it's important
1256 * to realize there is a difference between this table and CPUID -- if
1257 * applications want to get the raw CPUID data, they should access
1258 * /dev/cpu/<cpu_nr>/cpuid instead.
1259 */
1260 static char *x86_cap_flags[] = {
1261 /* Intel-defined */
1262 "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
1263 "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
1264 "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
1265 "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL,
1267 /* AMD-defined */
1268 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1269 NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
1270 NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
1271 NULL, "fxsr_opt", NULL, NULL, NULL, "lm", "3dnowext", "3dnow",
1273 /* Transmeta-defined */
1274 "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
1275 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1276 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1277 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1279 /* Other (Linux-defined) */
1280 "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
1281 "constant_tsc", NULL, NULL,
1282 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1283 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1284 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1286 /* Intel-defined (#2) */
1287 "pni", NULL, NULL, "monitor", "ds_cpl", NULL, NULL, "est",
1288 "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
1289 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1290 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1292 /* VIA/Cyrix/Centaur-defined */
1293 NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
1294 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1295 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1296 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1298 /* AMD-defined (#2) */
1299 "lahf_lm", "cmp_legacy", NULL, NULL, NULL, NULL, NULL, NULL,
1300 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1301 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1302 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1303 };
1304 static char *x86_power_flags[] = {
1305 "ts", /* temperature sensor */
1306 "fid", /* frequency id control */
1307 "vid", /* voltage id control */
1308 "ttp", /* thermal trip */
1309 "tm",
1310 "stc"
1311 };
1314 #ifdef CONFIG_SMP
1315 if (!cpu_online(c-cpu_data))
1316 return 0;
1317 #endif
1319 seq_printf(m,"processor\t: %u\n"
1320 "vendor_id\t: %s\n"
1321 "cpu family\t: %d\n"
1322 "model\t\t: %d\n"
1323 "model name\t: %s\n",
1324 (unsigned)(c-cpu_data),
1325 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
1326 c->x86,
1327 (int)c->x86_model,
1328 c->x86_model_id[0] ? c->x86_model_id : "unknown");
1330 if (c->x86_mask || c->cpuid_level >= 0)
1331 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
1332 else
1333 seq_printf(m, "stepping\t: unknown\n");
1335 if (cpu_has(c,X86_FEATURE_TSC)) {
1336 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
1337 cpu_khz / 1000, (cpu_khz % 1000));
1340 /* Cache size */
1341 if (c->x86_cache_size >= 0)
1342 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
1344 #ifdef CONFIG_SMP
1345 if (smp_num_siblings * c->x86_num_cores > 1) {
1346 int cpu = c - cpu_data;
1347 seq_printf(m, "physical id\t: %d\n", phys_proc_id[cpu]);
1348 seq_printf(m, "siblings\t: %d\n",
1349 c->x86_num_cores * smp_num_siblings);
1350 seq_printf(m, "core id\t\t: %d\n", cpu_core_id[cpu]);
1351 seq_printf(m, "cpu cores\t: %d\n", c->x86_num_cores);
1353 #endif
1355 seq_printf(m,
1356 "fpu\t\t: yes\n"
1357 "fpu_exception\t: yes\n"
1358 "cpuid level\t: %d\n"
1359 "wp\t\t: yes\n"
1360 "flags\t\t:",
1361 c->cpuid_level);
1364 int i;
1365 for ( i = 0 ; i < 32*NCAPINTS ; i++ )
1366 if ( test_bit(i, &c->x86_capability) &&
1367 x86_cap_flags[i] != NULL )
1368 seq_printf(m, " %s", x86_cap_flags[i]);
1371 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
1372 c->loops_per_jiffy/(500000/HZ),
1373 (c->loops_per_jiffy/(5000/HZ)) % 100);
1375 if (c->x86_tlbsize > 0)
1376 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
1377 seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
1378 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
1380 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
1381 c->x86_phys_bits, c->x86_virt_bits);
1383 seq_printf(m, "power management:");
1385 unsigned i;
1386 for (i = 0; i < 32; i++)
1387 if (c->x86_power & (1 << i)) {
1388 if (i < ARRAY_SIZE(x86_power_flags))
1389 seq_printf(m, " %s", x86_power_flags[i]);
1390 else
1391 seq_printf(m, " [%d]", i);
1395 seq_printf(m, "\n\n");
1397 return 0;
1400 static void *c_start(struct seq_file *m, loff_t *pos)
1402 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
1405 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1407 ++*pos;
1408 return c_start(m, pos);
1411 static void c_stop(struct seq_file *m, void *v)
1415 struct seq_operations cpuinfo_op = {
1416 .start =c_start,
1417 .next = c_next,
1418 .stop = c_stop,
1419 .show = show_cpuinfo,
1420 };