ia64/xen-unstable

view linux-2.6-xen-sparse/arch/xen/x86_64/kernel/setup.c @ 6432:b54144915ae6

merge?
author cl349@firebug.cl.cam.ac.uk
date Thu Aug 25 16:26:30 2005 +0000 (2005-08-25)
parents 3428d58a85e1 8d31f9a9c423
children 0610add7c3fe
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 u32 *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 union xen_start_info_union xen_start_info_union;
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 max_pfn * sizeof(u32));
738 memset(phys_to_machine_mapping, ~0,
739 max_pfn * sizeof(u32));
740 memcpy(phys_to_machine_mapping,
741 (u32 *)xen_start_info.mfn_list,
742 xen_start_info.nr_pages * sizeof(u32));
743 free_bootmem(
744 __pa(xen_start_info.mfn_list),
745 PFN_PHYS(PFN_UP(xen_start_info.nr_pages *
746 sizeof(u32))));
747 }
749 pfn_to_mfn_frame_list = alloc_bootmem(PAGE_SIZE);
751 for ( i=0, j=0; i < end_pfn; i+=(PAGE_SIZE/sizeof(u32)), j++ )
752 {
753 pfn_to_mfn_frame_list[j] =
754 virt_to_mfn(&phys_to_machine_mapping[i]);
755 }
757 }
758 #endif
760 #ifndef CONFIG_XEN
761 check_ioapic();
762 #endif
764 #ifdef CONFIG_ACPI_BOOT
765 /*
766 * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
767 * Call this early for SRAT node setup.
768 */
769 acpi_boot_table_init();
771 /*
772 * Read APIC and some other early information from ACPI tables.
773 */
774 acpi_boot_init();
775 #endif
777 #ifdef CONFIG_X86_LOCAL_APIC
778 /*
779 * get boot-time SMP configuration:
780 */
781 if (smp_found_config)
782 get_smp_config();
783 #ifndef CONFIG_XEN
784 init_apic_mappings();
785 #endif
786 #endif
788 #if defined(CONFIG_XEN_PRIVILEGED_GUEST) || !defined(CONFIG_XEN)
789 /*
790 * Request address space for all standard RAM and ROM resources
791 * and also for regions reported as reserved by the e820.
792 */
793 probe_roms();
794 e820_reserve_resources();
795 #endif
797 request_resource(&iomem_resource, &video_ram_resource);
799 {
800 unsigned i;
801 /* request I/O space for devices used on all i[345]86 PCs */
802 for (i = 0; i < STANDARD_IO_RESOURCES; i++)
803 request_resource(&ioport_resource, &standard_io_resources[i]);
804 }
806 e820_setup_gap();
808 #ifdef CONFIG_GART_IOMMU
809 iommu_hole_init();
810 #endif
812 #ifdef CONFIG_XEN
813 {
814 physdev_op_t op;
816 op.cmd = PHYSDEVOP_SET_IOPL;
817 op.u.set_iopl.iopl = 1;
818 HYPERVISOR_physdev_op(&op);
820 if (xen_start_info.flags & SIF_INITDOMAIN) {
821 if (!(xen_start_info.flags & SIF_PRIVILEGED))
822 panic("Xen granted us console access "
823 "but not privileged status");
825 #ifdef CONFIG_VT
826 #if defined(CONFIG_VGA_CONSOLE)
827 conswitchp = &vga_con;
828 #elif defined(CONFIG_DUMMY_CONSOLE)
829 conswitchp = &dummy_con;
830 #endif
831 #endif
832 } else {
833 #ifdef CONFIG_XEN_PRIVILEGED_GUEST
834 extern const struct consw xennull_con;
835 extern int console_use_vt;
836 #if defined(CONFIG_VGA_CONSOLE)
837 /* disable VGA driver */
838 ORIG_VIDEO_ISVGA = VIDEO_TYPE_VLFB;
839 #endif
840 conswitchp = &xennull_con;
841 console_use_vt = 0;
842 #endif
843 }
844 }
845 #else /* CONFIG_XEN */
847 #ifdef CONFIG_VT
848 #if defined(CONFIG_VGA_CONSOLE)
849 conswitchp = &vga_con;
850 #elif defined(CONFIG_DUMMY_CONSOLE)
851 conswitchp = &dummy_con;
852 #endif
853 #endif
855 #endif /* !CONFIG_XEN */
856 }
858 static int __init get_model_name(struct cpuinfo_x86 *c)
859 {
860 unsigned int *v;
862 if (c->extended_cpuid_level < 0x80000004)
863 return 0;
865 v = (unsigned int *) c->x86_model_id;
866 cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
867 cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
868 cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
869 c->x86_model_id[48] = 0;
870 return 1;
871 }
874 static void __init display_cacheinfo(struct cpuinfo_x86 *c)
875 {
876 unsigned int n, dummy, eax, ebx, ecx, edx;
878 n = c->extended_cpuid_level;
880 if (n >= 0x80000005) {
881 cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
882 printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
883 edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
884 c->x86_cache_size=(ecx>>24)+(edx>>24);
885 /* On K8 L1 TLB is inclusive, so don't count it */
886 c->x86_tlbsize = 0;
887 }
889 if (n >= 0x80000006) {
890 cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
891 ecx = cpuid_ecx(0x80000006);
892 c->x86_cache_size = ecx >> 16;
893 c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
895 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
896 c->x86_cache_size, ecx & 0xFF);
897 }
899 if (n >= 0x80000007)
900 cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power);
901 if (n >= 0x80000008) {
902 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
903 c->x86_virt_bits = (eax >> 8) & 0xff;
904 c->x86_phys_bits = eax & 0xff;
905 }
906 }
908 /*
909 * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
910 * Assumes number of cores is a power of two.
911 */
912 static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
913 {
914 #ifdef CONFIG_SMP
915 int cpu = smp_processor_id();
916 int node = 0;
917 unsigned bits;
918 if (c->x86_num_cores == 1)
919 return;
921 bits = 0;
922 while ((1 << bits) < c->x86_num_cores)
923 bits++;
925 /* Low order bits define the core id (index of core in socket) */
926 cpu_core_id[cpu] = phys_proc_id[cpu] & ((1 << bits)-1);
927 /* Convert the APIC ID into the socket ID */
928 phys_proc_id[cpu] >>= bits;
930 #ifdef CONFIG_NUMA
931 /* When an ACPI SRAT table is available use the mappings from SRAT
932 instead. */
933 if (acpi_numa <= 0) {
934 node = phys_proc_id[cpu];
935 if (!node_online(node))
936 node = first_node(node_online_map);
937 cpu_to_node[cpu] = node;
938 } else {
939 node = cpu_to_node[cpu];
940 }
941 #endif
943 printk(KERN_INFO "CPU %d(%d) -> Node %d -> Core %d\n",
944 cpu, c->x86_num_cores, node, cpu_core_id[cpu]);
945 #endif
946 }
948 static int __init init_amd(struct cpuinfo_x86 *c)
949 {
950 int r;
951 int level;
953 /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
954 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
955 clear_bit(0*32+31, &c->x86_capability);
957 /* C-stepping K8? */
958 level = cpuid_eax(1);
959 if ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58)
960 set_bit(X86_FEATURE_K8_C, &c->x86_capability);
962 r = get_model_name(c);
963 if (!r) {
964 switch (c->x86) {
965 case 15:
966 /* Should distinguish Models here, but this is only
967 a fallback anyways. */
968 strcpy(c->x86_model_id, "Hammer");
969 break;
970 }
971 }
972 display_cacheinfo(c);
974 if (c->extended_cpuid_level >= 0x80000008) {
975 c->x86_num_cores = (cpuid_ecx(0x80000008) & 0xff) + 1;
976 if (c->x86_num_cores & (c->x86_num_cores - 1))
977 c->x86_num_cores = 1;
979 amd_detect_cmp(c);
980 }
982 return r;
983 }
985 static void __init detect_ht(struct cpuinfo_x86 *c)
986 {
987 #ifdef CONFIG_SMP
988 u32 eax, ebx, ecx, edx;
989 int index_msb, tmp;
990 int cpu = smp_processor_id();
992 if (!cpu_has(c, X86_FEATURE_HT) || cpu_has(c, X86_FEATURE_CMP_LEGACY))
993 return;
995 cpuid(1, &eax, &ebx, &ecx, &edx);
996 smp_num_siblings = (ebx & 0xff0000) >> 16;
998 if (smp_num_siblings == 1) {
999 printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
1000 } else if (smp_num_siblings > 1) {
1001 index_msb = 31;
1002 /*
1003 * At this point we only support two siblings per
1004 * processor package.
1005 */
1006 if (smp_num_siblings > NR_CPUS) {
1007 printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
1008 smp_num_siblings = 1;
1009 return;
1011 tmp = smp_num_siblings;
1012 while ((tmp & 0x80000000 ) == 0) {
1013 tmp <<=1 ;
1014 index_msb--;
1016 if (smp_num_siblings & (smp_num_siblings - 1))
1017 index_msb++;
1018 phys_proc_id[cpu] = phys_pkg_id(index_msb);
1020 printk(KERN_INFO "CPU: Physical Processor ID: %d\n",
1021 phys_proc_id[cpu]);
1023 smp_num_siblings = smp_num_siblings / c->x86_num_cores;
1025 tmp = smp_num_siblings;
1026 index_msb = 31;
1027 while ((tmp & 0x80000000) == 0) {
1028 tmp <<=1 ;
1029 index_msb--;
1031 if (smp_num_siblings & (smp_num_siblings - 1))
1032 index_msb++;
1034 cpu_core_id[cpu] = phys_pkg_id(index_msb);
1036 if (c->x86_num_cores > 1)
1037 printk(KERN_INFO "CPU: Processor Core ID: %d\n",
1038 cpu_core_id[cpu]);
1040 #endif
1043 /*
1044 * find out the number of processor cores on the die
1045 */
1046 static int __init intel_num_cpu_cores(struct cpuinfo_x86 *c)
1048 unsigned int eax;
1050 if (c->cpuid_level < 4)
1051 return 1;
1053 __asm__("cpuid"
1054 : "=a" (eax)
1055 : "0" (4), "c" (0)
1056 : "bx", "dx");
1058 if (eax & 0x1f)
1059 return ((eax >> 26) + 1);
1060 else
1061 return 1;
1064 static void __init init_intel(struct cpuinfo_x86 *c)
1066 /* Cache sizes */
1067 unsigned n;
1069 init_intel_cacheinfo(c);
1070 n = c->extended_cpuid_level;
1071 if (n >= 0x80000008) {
1072 unsigned eax = cpuid_eax(0x80000008);
1073 c->x86_virt_bits = (eax >> 8) & 0xff;
1074 c->x86_phys_bits = eax & 0xff;
1077 if (c->x86 == 15)
1078 c->x86_cache_alignment = c->x86_clflush_size * 2;
1079 if (c->x86 >= 15)
1080 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
1081 c->x86_num_cores = intel_num_cpu_cores(c);
1084 void __init get_cpu_vendor(struct cpuinfo_x86 *c)
1086 char *v = c->x86_vendor_id;
1088 if (!strcmp(v, "AuthenticAMD"))
1089 c->x86_vendor = X86_VENDOR_AMD;
1090 else if (!strcmp(v, "GenuineIntel"))
1091 c->x86_vendor = X86_VENDOR_INTEL;
1092 else
1093 c->x86_vendor = X86_VENDOR_UNKNOWN;
1096 struct cpu_model_info {
1097 int vendor;
1098 int family;
1099 char *model_names[16];
1100 };
1102 /* Do some early cpuid on the boot CPU to get some parameter that are
1103 needed before check_bugs. Everything advanced is in identify_cpu
1104 below. */
1105 void __init early_identify_cpu(struct cpuinfo_x86 *c)
1107 u32 tfms;
1109 c->loops_per_jiffy = loops_per_jiffy;
1110 c->x86_cache_size = -1;
1111 c->x86_vendor = X86_VENDOR_UNKNOWN;
1112 c->x86_model = c->x86_mask = 0; /* So far unknown... */
1113 c->x86_vendor_id[0] = '\0'; /* Unset */
1114 c->x86_model_id[0] = '\0'; /* Unset */
1115 c->x86_clflush_size = 64;
1116 c->x86_cache_alignment = c->x86_clflush_size;
1117 c->x86_num_cores = 1;
1118 c->extended_cpuid_level = 0;
1119 memset(&c->x86_capability, 0, sizeof c->x86_capability);
1121 /* Get vendor name */
1122 cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
1123 (unsigned int *)&c->x86_vendor_id[0],
1124 (unsigned int *)&c->x86_vendor_id[8],
1125 (unsigned int *)&c->x86_vendor_id[4]);
1127 get_cpu_vendor(c);
1129 /* Initialize the standard set of capabilities */
1130 /* Note that the vendor-specific code below might override */
1132 /* Intel-defined flags: level 0x00000001 */
1133 if (c->cpuid_level >= 0x00000001) {
1134 __u32 misc;
1135 cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
1136 &c->x86_capability[0]);
1137 c->x86 = (tfms >> 8) & 0xf;
1138 c->x86_model = (tfms >> 4) & 0xf;
1139 c->x86_mask = tfms & 0xf;
1140 if (c->x86 == 0xf) {
1141 c->x86 += (tfms >> 20) & 0xff;
1142 c->x86_model += ((tfms >> 16) & 0xF) << 4;
1144 if (c->x86_capability[0] & (1<<19))
1145 c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
1146 } else {
1147 /* Have CPUID level 0 only - unheard of */
1148 c->x86 = 4;
1151 #ifdef CONFIG_SMP
1152 phys_proc_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff;
1153 #endif
1156 /*
1157 * This does the hard work of actually picking apart the CPU stuff...
1158 */
1159 void __init identify_cpu(struct cpuinfo_x86 *c)
1161 int i;
1162 u32 xlvl;
1164 early_identify_cpu(c);
1166 /* AMD-defined flags: level 0x80000001 */
1167 xlvl = cpuid_eax(0x80000000);
1168 c->extended_cpuid_level = xlvl;
1169 if ((xlvl & 0xffff0000) == 0x80000000) {
1170 if (xlvl >= 0x80000001) {
1171 c->x86_capability[1] = cpuid_edx(0x80000001);
1172 c->x86_capability[6] = cpuid_ecx(0x80000001);
1174 if (xlvl >= 0x80000004)
1175 get_model_name(c); /* Default name */
1178 /* Transmeta-defined flags: level 0x80860001 */
1179 xlvl = cpuid_eax(0x80860000);
1180 if ((xlvl & 0xffff0000) == 0x80860000) {
1181 /* Don't set x86_cpuid_level here for now to not confuse. */
1182 if (xlvl >= 0x80860001)
1183 c->x86_capability[2] = cpuid_edx(0x80860001);
1186 /*
1187 * Vendor-specific initialization. In this section we
1188 * canonicalize the feature flags, meaning if there are
1189 * features a certain CPU supports which CPUID doesn't
1190 * tell us, CPUID claiming incorrect flags, or other bugs,
1191 * we handle them here.
1193 * At the end of this section, c->x86_capability better
1194 * indicate the features this CPU genuinely supports!
1195 */
1196 switch (c->x86_vendor) {
1197 case X86_VENDOR_AMD:
1198 init_amd(c);
1199 break;
1201 case X86_VENDOR_INTEL:
1202 init_intel(c);
1203 break;
1205 case X86_VENDOR_UNKNOWN:
1206 default:
1207 display_cacheinfo(c);
1208 break;
1211 select_idle_routine(c);
1212 detect_ht(c);
1214 /*
1215 * On SMP, boot_cpu_data holds the common feature set between
1216 * all CPUs; so make sure that we indicate which features are
1217 * common between the CPUs. The first time this routine gets
1218 * executed, c == &boot_cpu_data.
1219 */
1220 if (c != &boot_cpu_data) {
1221 /* AND the already accumulated flags with these */
1222 for (i = 0 ; i < NCAPINTS ; i++)
1223 boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
1226 #ifdef CONFIG_X86_MCE
1227 mcheck_init(c);
1228 #endif
1229 #ifdef CONFIG_NUMA
1230 if (c != &boot_cpu_data)
1231 numa_add_cpu(c - cpu_data);
1232 #endif
1236 void __init print_cpu_info(struct cpuinfo_x86 *c)
1238 if (c->x86_model_id[0])
1239 printk("%s", c->x86_model_id);
1241 if (c->x86_mask || c->cpuid_level >= 0)
1242 printk(" stepping %02x\n", c->x86_mask);
1243 else
1244 printk("\n");
1247 /*
1248 * Get CPU information for use by the procfs.
1249 */
1251 static int show_cpuinfo(struct seq_file *m, void *v)
1253 struct cpuinfo_x86 *c = v;
1255 /*
1256 * These flag bits must match the definitions in <asm/cpufeature.h>.
1257 * NULL means this bit is undefined or reserved; either way it doesn't
1258 * have meaning as far as Linux is concerned. Note that it's important
1259 * to realize there is a difference between this table and CPUID -- if
1260 * applications want to get the raw CPUID data, they should access
1261 * /dev/cpu/<cpu_nr>/cpuid instead.
1262 */
1263 static char *x86_cap_flags[] = {
1264 /* Intel-defined */
1265 "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
1266 "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
1267 "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
1268 "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL,
1270 /* AMD-defined */
1271 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1272 NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
1273 NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
1274 NULL, "fxsr_opt", NULL, NULL, NULL, "lm", "3dnowext", "3dnow",
1276 /* Transmeta-defined */
1277 "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
1278 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1279 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1280 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1282 /* Other (Linux-defined) */
1283 "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
1284 "constant_tsc", NULL, NULL,
1285 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1286 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1287 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1289 /* Intel-defined (#2) */
1290 "pni", NULL, NULL, "monitor", "ds_cpl", NULL, NULL, "est",
1291 "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
1292 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1293 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1295 /* VIA/Cyrix/Centaur-defined */
1296 NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
1297 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1298 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1299 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1301 /* AMD-defined (#2) */
1302 "lahf_lm", "cmp_legacy", NULL, NULL, NULL, NULL, NULL, NULL,
1303 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1304 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1305 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1306 };
1307 static char *x86_power_flags[] = {
1308 "ts", /* temperature sensor */
1309 "fid", /* frequency id control */
1310 "vid", /* voltage id control */
1311 "ttp", /* thermal trip */
1312 "tm",
1313 "stc"
1314 };
1317 #ifdef CONFIG_SMP
1318 if (!cpu_online(c-cpu_data))
1319 return 0;
1320 #endif
1322 seq_printf(m,"processor\t: %u\n"
1323 "vendor_id\t: %s\n"
1324 "cpu family\t: %d\n"
1325 "model\t\t: %d\n"
1326 "model name\t: %s\n",
1327 (unsigned)(c-cpu_data),
1328 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
1329 c->x86,
1330 (int)c->x86_model,
1331 c->x86_model_id[0] ? c->x86_model_id : "unknown");
1333 if (c->x86_mask || c->cpuid_level >= 0)
1334 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
1335 else
1336 seq_printf(m, "stepping\t: unknown\n");
1338 if (cpu_has(c,X86_FEATURE_TSC)) {
1339 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
1340 cpu_khz / 1000, (cpu_khz % 1000));
1343 /* Cache size */
1344 if (c->x86_cache_size >= 0)
1345 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
1347 #ifdef CONFIG_SMP
1348 if (smp_num_siblings * c->x86_num_cores > 1) {
1349 int cpu = c - cpu_data;
1350 seq_printf(m, "physical id\t: %d\n", phys_proc_id[cpu]);
1351 seq_printf(m, "siblings\t: %d\n",
1352 c->x86_num_cores * smp_num_siblings);
1353 seq_printf(m, "core id\t\t: %d\n", cpu_core_id[cpu]);
1354 seq_printf(m, "cpu cores\t: %d\n", c->x86_num_cores);
1356 #endif
1358 seq_printf(m,
1359 "fpu\t\t: yes\n"
1360 "fpu_exception\t: yes\n"
1361 "cpuid level\t: %d\n"
1362 "wp\t\t: yes\n"
1363 "flags\t\t:",
1364 c->cpuid_level);
1367 int i;
1368 for ( i = 0 ; i < 32*NCAPINTS ; i++ )
1369 if ( test_bit(i, &c->x86_capability) &&
1370 x86_cap_flags[i] != NULL )
1371 seq_printf(m, " %s", x86_cap_flags[i]);
1374 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
1375 c->loops_per_jiffy/(500000/HZ),
1376 (c->loops_per_jiffy/(5000/HZ)) % 100);
1378 if (c->x86_tlbsize > 0)
1379 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
1380 seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
1381 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
1383 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
1384 c->x86_phys_bits, c->x86_virt_bits);
1386 seq_printf(m, "power management:");
1388 unsigned i;
1389 for (i = 0; i < 32; i++)
1390 if (c->x86_power & (1 << i)) {
1391 if (i < ARRAY_SIZE(x86_power_flags))
1392 seq_printf(m, " %s", x86_power_flags[i]);
1393 else
1394 seq_printf(m, " [%d]", i);
1398 seq_printf(m, "\n\n");
1400 return 0;
1403 static void *c_start(struct seq_file *m, loff_t *pos)
1405 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
1408 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1410 ++*pos;
1411 return c_start(m, pos);
1414 static void c_stop(struct seq_file *m, void *v)
1418 struct seq_operations cpuinfo_op = {
1419 .start =c_start,
1420 .next = c_next,
1421 .stop = c_stop,
1422 .show = show_cpuinfo,
1423 };