ia64/xen-unstable

view linux-2.6-xen-sparse/arch/xen/x86_64/kernel/setup.c @ 6422:e24fd7012ffb

merge?
author cl349@firebug.cl.cam.ac.uk
date Thu Aug 25 10:09:39 2005 +0000 (2005-08-25)
parents 2f20c2fce2c5 d1ac7c6ffb63
children 4abd299ef2f6
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 #ifdef CONFIG_XEN
540 #define reserve_ebda_region() void(0)
542 static void __init print_memory_map(char *who)
543 {
544 int i;
546 for (i = 0; i < e820.nr_map; i++) {
547 early_printk(" %s: %016Lx - %016Lx ", who,
548 e820.map[i].addr,
549 e820.map[i].addr + e820.map[i].size);
550 switch (e820.map[i].type) {
551 case E820_RAM: early_printk("(usable)\n");
552 break;
553 case E820_RESERVED:
554 early_printk("(reserved)\n");
555 break;
556 case E820_ACPI:
557 early_printk("(ACPI data)\n");
558 break;
559 case E820_NVS:
560 early_printk("(ACPI NVS)\n");
561 break;
562 default: early_printk("type %u\n", e820.map[i].type);
563 break;
564 }
565 }
566 }
568 void __init smp_alloc_memory(void)
569 {
570 int cpu;
572 for (cpu = 1; cpu < NR_CPUS; cpu++) {
573 cpu_gdt_descr[cpu].address = (unsigned long)
574 alloc_bootmem_low_pages(PAGE_SIZE);
575 /* XXX free unused pages later */
576 }
577 }
580 #else
581 #define EBDA_ADDR_POINTER 0x40E
582 static void __init reserve_ebda_region(void)
583 {
584 unsigned int addr;
585 /**
586 * there is a real-mode segmented pointer pointing to the
587 * 4K EBDA area at 0x40E
588 */
589 addr = *(unsigned short *)phys_to_virt(EBDA_ADDR_POINTER);
590 addr <<= 4;
591 if (addr)
592 reserve_bootmem_generic(addr, PAGE_SIZE);
593 }
594 #endif
596 void __init setup_arch(char **cmdline_p)
597 {
598 unsigned long kernel_end;
600 #ifdef CONFIG_XEN
601 ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
602 drive_info = DRIVE_INFO;
603 kernel_end = 0; /* dummy */
604 #ifdef CONFIG_XEN_PHYSDEV_ACCESS
605 screen_info = SCREEN_INFO;
607 /* This is drawn from a dump from vgacon:startup in standard Linux. */
608 screen_info.orig_video_mode = 3;
609 screen_info.orig_video_isVGA = 1;
610 screen_info.orig_video_lines = 25;
611 screen_info.orig_video_cols = 80;
612 screen_info.orig_video_ega_bx = 3;
613 screen_info.orig_video_points = 16;
614 #endif
615 edid_info = EDID_INFO;
616 saved_video_mode = SAVED_VIDEO_MODE;
617 bootloader_type = LOADER_TYPE;
619 #ifdef CONFIG_BLK_DEV_RAM
620 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
621 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
622 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
625 #endif
627 HYPERVISOR_vm_assist(VMASST_CMD_enable,
628 VMASST_TYPE_writable_pagetables);
630 ARCH_SETUP
631 print_memory_map(machine_specific_memory_setup());
632 #else
633 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
634 drive_info = DRIVE_INFO;
635 screen_info = SCREEN_INFO;
636 edid_info = EDID_INFO;
637 saved_video_mode = SAVED_VIDEO_MODE;
638 bootloader_type = LOADER_TYPE;
640 #ifdef CONFIG_BLK_DEV_RAM
641 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
642 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
643 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
644 #endif
645 setup_memory_region();
646 copy_edd();
647 #endif /* !CONFIG_XEN */
649 if (!MOUNT_ROOT_RDONLY)
650 root_mountflags &= ~MS_RDONLY;
651 init_mm.start_code = (unsigned long) &_text;
652 init_mm.end_code = (unsigned long) &_etext;
653 init_mm.end_data = (unsigned long) &_edata;
654 #ifdef CONFIG_XEN
655 init_mm.brk = start_pfn << PAGE_SHIFT;
656 #else
657 init_mm.brk = (unsigned long) &_end;
659 code_resource.start = virt_to_phys(&_text);
660 code_resource.end = virt_to_phys(&_etext)-1;
661 data_resource.start = virt_to_phys(&_etext);
662 data_resource.end = virt_to_phys(&_edata)-1;
663 #endif
665 parse_cmdline_early(cmdline_p);
667 early_identify_cpu(&boot_cpu_data);
669 /*
670 * partially used pages are not usable - thus
671 * we are rounding upwards:
672 */
673 end_pfn = e820_end_of_ram();
675 check_efer();
677 init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
679 #ifdef CONFIG_ACPI_NUMA
680 /*
681 * Parse SRAT to discover nodes.
682 */
683 acpi_numa_init();
684 #endif
686 #ifdef CONFIG_DISCONTIGMEM
687 numa_initmem_init(0, end_pfn);
688 #else
689 contig_initmem_init();
690 #endif
692 #ifndef CONFIG_XEN
693 /* Reserve direct mapping */
694 reserve_bootmem_generic(table_start << PAGE_SHIFT,
695 (table_end - table_start) << PAGE_SHIFT);
697 /* reserve kernel */
698 kernel_end = round_up(__pa_symbol(&_end),PAGE_SIZE);
699 reserve_bootmem_generic(HIGH_MEMORY, kernel_end - HIGH_MEMORY);
701 /*
702 * reserve physical page 0 - it's a special BIOS page on many boxes,
703 * enabling clean reboots, SMP operation, laptop functions.
704 */
705 reserve_bootmem_generic(0, PAGE_SIZE);
707 /* reserve ebda region */
708 reserve_ebda_region();
709 #endif
712 #ifdef CONFIG_SMP
713 /*
714 * But first pinch a few for the stack/trampoline stuff
715 * FIXME: Don't need the extra page at 4K, but need to fix
716 * trampoline before removing it. (see the GDT stuff)
717 */
718 reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);
720 /* Reserve SMP trampoline */
721 reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
722 #endif
724 #ifdef CONFIG_ACPI_SLEEP
725 /*
726 * Reserve low memory region for sleep support.
727 */
728 acpi_reserve_bootmem();
729 #endif
730 #ifdef CONFIG_XEN
731 #ifdef CONFIG_BLK_DEV_INITRD
732 if (xen_start_info.mod_start) {
733 if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
734 /*reserve_bootmem_generic(INITRD_START, INITRD_SIZE);*/
735 initrd_start = INITRD_START + PAGE_OFFSET;
736 initrd_end = initrd_start+INITRD_SIZE;
737 initrd_below_start_ok = 1;
738 } else {
739 printk(KERN_ERR "initrd extends beyond end of memory "
740 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
741 (unsigned long)(INITRD_START + INITRD_SIZE),
742 (unsigned long)(end_pfn << PAGE_SHIFT));
743 initrd_start = 0;
744 }
745 }
746 #endif
747 #ifdef CONFIG_SMP
748 smp_alloc_memory();
749 #endif
750 #else /* CONFIG_XEN */
751 #ifdef CONFIG_BLK_DEV_INITRD
752 if (LOADER_TYPE && INITRD_START) {
753 if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
754 reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
755 initrd_start =
756 INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
757 initrd_end = initrd_start+INITRD_SIZE;
758 }
759 else {
760 printk(KERN_ERR "initrd extends beyond end of memory "
761 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
762 (unsigned long)(INITRD_START + INITRD_SIZE),
763 (unsigned long)(end_pfn << PAGE_SHIFT));
764 initrd_start = 0;
765 }
766 }
767 #endif
768 #endif /* !CONFIG_XEN */
769 paging_init();
770 #ifdef CONFIG_X86_LOCAL_APIC
771 /*
772 * Find and reserve possible boot-time SMP configuration:
773 */
774 find_smp_config();
775 #endif
776 #ifdef CONFIG_XEN
777 {
778 int i, j;
779 /* Make sure we have a large enough P->M table. */
780 if (end_pfn > xen_start_info.nr_pages) {
781 phys_to_machine_mapping = alloc_bootmem(
782 max_pfn * sizeof(u32));
783 memset(phys_to_machine_mapping, ~0,
784 max_pfn * sizeof(u32));
785 memcpy(phys_to_machine_mapping,
786 (u32 *)xen_start_info.mfn_list,
787 xen_start_info.nr_pages * sizeof(u32));
788 free_bootmem(
789 __pa(xen_start_info.mfn_list),
790 PFN_PHYS(PFN_UP(xen_start_info.nr_pages *
791 sizeof(u32))));
792 }
794 pfn_to_mfn_frame_list = alloc_bootmem(PAGE_SIZE);
796 for ( i=0, j=0; i < end_pfn; i+=(PAGE_SIZE/sizeof(u32)), j++ )
797 {
798 pfn_to_mfn_frame_list[j] =
799 virt_to_mfn(&phys_to_machine_mapping[i]);
800 }
802 }
803 #endif
805 #ifndef CONFIG_XEN
806 check_ioapic();
807 #endif
809 #ifdef CONFIG_ACPI_BOOT
810 /*
811 * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
812 * Call this early for SRAT node setup.
813 */
814 acpi_boot_table_init();
816 /*
817 * Read APIC and some other early information from ACPI tables.
818 */
819 acpi_boot_init();
820 #endif
822 #ifdef CONFIG_X86_LOCAL_APIC
823 /*
824 * get boot-time SMP configuration:
825 */
826 if (smp_found_config)
827 get_smp_config();
828 #ifndef CONFIG_XEN
829 init_apic_mappings();
830 #endif
831 #endif
833 #if defined(CONFIG_XEN_PRIVILEGED_GUEST) || !defined(CONFIG_XEN)
834 /*
835 * Request address space for all standard RAM and ROM resources
836 * and also for regions reported as reserved by the e820.
837 */
838 probe_roms();
839 e820_reserve_resources();
840 #endif
842 request_resource(&iomem_resource, &video_ram_resource);
844 {
845 unsigned i;
846 /* request I/O space for devices used on all i[345]86 PCs */
847 for (i = 0; i < STANDARD_IO_RESOURCES; i++)
848 request_resource(&ioport_resource, &standard_io_resources[i]);
849 }
851 e820_setup_gap();
853 #ifdef CONFIG_GART_IOMMU
854 iommu_hole_init();
855 #endif
857 #ifdef CONFIG_XEN
858 {
859 physdev_op_t op;
861 op.cmd = PHYSDEVOP_SET_IOPL;
862 op.u.set_iopl.iopl = 1;
863 HYPERVISOR_physdev_op(&op);
865 if (xen_start_info.flags & SIF_INITDOMAIN) {
866 if (!(xen_start_info.flags & SIF_PRIVILEGED))
867 panic("Xen granted us console access "
868 "but not privileged status");
870 #ifdef CONFIG_VT
871 #if defined(CONFIG_VGA_CONSOLE)
872 conswitchp = &vga_con;
873 #elif defined(CONFIG_DUMMY_CONSOLE)
874 conswitchp = &dummy_con;
875 #endif
876 #endif
877 } else {
878 #ifdef CONFIG_XEN_PRIVILEGED_GUEST
879 extern const struct consw xennull_con;
880 extern int console_use_vt;
881 #if defined(CONFIG_VGA_CONSOLE)
882 /* disable VGA driver */
883 ORIG_VIDEO_ISVGA = VIDEO_TYPE_VLFB;
884 #endif
885 conswitchp = &xennull_con;
886 console_use_vt = 0;
887 #endif
888 }
889 }
890 #else /* CONFIG_XEN */
892 #ifdef CONFIG_VT
893 #if defined(CONFIG_VGA_CONSOLE)
894 conswitchp = &vga_con;
895 #elif defined(CONFIG_DUMMY_CONSOLE)
896 conswitchp = &dummy_con;
897 #endif
898 #endif
900 #endif /* !CONFIG_XEN */
901 }
903 static int __init get_model_name(struct cpuinfo_x86 *c)
904 {
905 unsigned int *v;
907 if (c->extended_cpuid_level < 0x80000004)
908 return 0;
910 v = (unsigned int *) c->x86_model_id;
911 cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
912 cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
913 cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
914 c->x86_model_id[48] = 0;
915 return 1;
916 }
919 static void __init display_cacheinfo(struct cpuinfo_x86 *c)
920 {
921 unsigned int n, dummy, eax, ebx, ecx, edx;
923 n = c->extended_cpuid_level;
925 if (n >= 0x80000005) {
926 cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
927 printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
928 edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
929 c->x86_cache_size=(ecx>>24)+(edx>>24);
930 /* On K8 L1 TLB is inclusive, so don't count it */
931 c->x86_tlbsize = 0;
932 }
934 if (n >= 0x80000006) {
935 cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
936 ecx = cpuid_ecx(0x80000006);
937 c->x86_cache_size = ecx >> 16;
938 c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
940 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
941 c->x86_cache_size, ecx & 0xFF);
942 }
944 if (n >= 0x80000007)
945 cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power);
946 if (n >= 0x80000008) {
947 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
948 c->x86_virt_bits = (eax >> 8) & 0xff;
949 c->x86_phys_bits = eax & 0xff;
950 }
951 }
953 /*
954 * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
955 * Assumes number of cores is a power of two.
956 */
957 static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
958 {
959 #ifdef CONFIG_SMP
960 int cpu = smp_processor_id();
961 int node = 0;
962 unsigned bits;
963 if (c->x86_num_cores == 1)
964 return;
966 bits = 0;
967 while ((1 << bits) < c->x86_num_cores)
968 bits++;
970 /* Low order bits define the core id (index of core in socket) */
971 cpu_core_id[cpu] = phys_proc_id[cpu] & ((1 << bits)-1);
972 /* Convert the APIC ID into the socket ID */
973 phys_proc_id[cpu] >>= bits;
975 #ifdef CONFIG_NUMA
976 /* When an ACPI SRAT table is available use the mappings from SRAT
977 instead. */
978 if (acpi_numa <= 0) {
979 node = phys_proc_id[cpu];
980 if (!node_online(node))
981 node = first_node(node_online_map);
982 cpu_to_node[cpu] = node;
983 } else {
984 node = cpu_to_node[cpu];
985 }
986 #endif
988 printk(KERN_INFO "CPU %d(%d) -> Node %d -> Core %d\n",
989 cpu, c->x86_num_cores, node, cpu_core_id[cpu]);
990 #endif
991 }
993 static int __init init_amd(struct cpuinfo_x86 *c)
994 {
995 int r;
996 int level;
998 /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
999 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
1000 clear_bit(0*32+31, &c->x86_capability);
1002 /* C-stepping K8? */
1003 level = cpuid_eax(1);
1004 if ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58)
1005 set_bit(X86_FEATURE_K8_C, &c->x86_capability);
1007 r = get_model_name(c);
1008 if (!r) {
1009 switch (c->x86) {
1010 case 15:
1011 /* Should distinguish Models here, but this is only
1012 a fallback anyways. */
1013 strcpy(c->x86_model_id, "Hammer");
1014 break;
1017 display_cacheinfo(c);
1019 if (c->extended_cpuid_level >= 0x80000008) {
1020 c->x86_num_cores = (cpuid_ecx(0x80000008) & 0xff) + 1;
1021 if (c->x86_num_cores & (c->x86_num_cores - 1))
1022 c->x86_num_cores = 1;
1024 amd_detect_cmp(c);
1027 return r;
1030 static void __init detect_ht(struct cpuinfo_x86 *c)
1032 #ifdef CONFIG_SMP
1033 u32 eax, ebx, ecx, edx;
1034 int index_msb, tmp;
1035 int cpu = smp_processor_id();
1037 if (!cpu_has(c, X86_FEATURE_HT) || cpu_has(c, X86_FEATURE_CMP_LEGACY))
1038 return;
1040 cpuid(1, &eax, &ebx, &ecx, &edx);
1041 smp_num_siblings = (ebx & 0xff0000) >> 16;
1043 if (smp_num_siblings == 1) {
1044 printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
1045 } else if (smp_num_siblings > 1) {
1046 index_msb = 31;
1047 /*
1048 * At this point we only support two siblings per
1049 * processor package.
1050 */
1051 if (smp_num_siblings > NR_CPUS) {
1052 printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
1053 smp_num_siblings = 1;
1054 return;
1056 tmp = smp_num_siblings;
1057 while ((tmp & 0x80000000 ) == 0) {
1058 tmp <<=1 ;
1059 index_msb--;
1061 if (smp_num_siblings & (smp_num_siblings - 1))
1062 index_msb++;
1063 phys_proc_id[cpu] = phys_pkg_id(index_msb);
1065 printk(KERN_INFO "CPU: Physical Processor ID: %d\n",
1066 phys_proc_id[cpu]);
1068 smp_num_siblings = smp_num_siblings / c->x86_num_cores;
1070 tmp = smp_num_siblings;
1071 index_msb = 31;
1072 while ((tmp & 0x80000000) == 0) {
1073 tmp <<=1 ;
1074 index_msb--;
1076 if (smp_num_siblings & (smp_num_siblings - 1))
1077 index_msb++;
1079 cpu_core_id[cpu] = phys_pkg_id(index_msb);
1081 if (c->x86_num_cores > 1)
1082 printk(KERN_INFO "CPU: Processor Core ID: %d\n",
1083 cpu_core_id[cpu]);
1085 #endif
1088 /*
1089 * find out the number of processor cores on the die
1090 */
1091 static int __init intel_num_cpu_cores(struct cpuinfo_x86 *c)
1093 unsigned int eax;
1095 if (c->cpuid_level < 4)
1096 return 1;
1098 __asm__("cpuid"
1099 : "=a" (eax)
1100 : "0" (4), "c" (0)
1101 : "bx", "dx");
1103 if (eax & 0x1f)
1104 return ((eax >> 26) + 1);
1105 else
1106 return 1;
1109 static void __init init_intel(struct cpuinfo_x86 *c)
1111 /* Cache sizes */
1112 unsigned n;
1114 init_intel_cacheinfo(c);
1115 n = c->extended_cpuid_level;
1116 if (n >= 0x80000008) {
1117 unsigned eax = cpuid_eax(0x80000008);
1118 c->x86_virt_bits = (eax >> 8) & 0xff;
1119 c->x86_phys_bits = eax & 0xff;
1122 if (c->x86 == 15)
1123 c->x86_cache_alignment = c->x86_clflush_size * 2;
1124 if (c->x86 >= 15)
1125 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
1126 c->x86_num_cores = intel_num_cpu_cores(c);
1129 void __init get_cpu_vendor(struct cpuinfo_x86 *c)
1131 char *v = c->x86_vendor_id;
1133 if (!strcmp(v, "AuthenticAMD"))
1134 c->x86_vendor = X86_VENDOR_AMD;
1135 else if (!strcmp(v, "GenuineIntel"))
1136 c->x86_vendor = X86_VENDOR_INTEL;
1137 else
1138 c->x86_vendor = X86_VENDOR_UNKNOWN;
1141 struct cpu_model_info {
1142 int vendor;
1143 int family;
1144 char *model_names[16];
1145 };
1147 /* Do some early cpuid on the boot CPU to get some parameter that are
1148 needed before check_bugs. Everything advanced is in identify_cpu
1149 below. */
1150 void __init early_identify_cpu(struct cpuinfo_x86 *c)
1152 u32 tfms;
1154 c->loops_per_jiffy = loops_per_jiffy;
1155 c->x86_cache_size = -1;
1156 c->x86_vendor = X86_VENDOR_UNKNOWN;
1157 c->x86_model = c->x86_mask = 0; /* So far unknown... */
1158 c->x86_vendor_id[0] = '\0'; /* Unset */
1159 c->x86_model_id[0] = '\0'; /* Unset */
1160 c->x86_clflush_size = 64;
1161 c->x86_cache_alignment = c->x86_clflush_size;
1162 c->x86_num_cores = 1;
1163 c->extended_cpuid_level = 0;
1164 memset(&c->x86_capability, 0, sizeof c->x86_capability);
1166 /* Get vendor name */
1167 cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
1168 (unsigned int *)&c->x86_vendor_id[0],
1169 (unsigned int *)&c->x86_vendor_id[8],
1170 (unsigned int *)&c->x86_vendor_id[4]);
1172 get_cpu_vendor(c);
1174 /* Initialize the standard set of capabilities */
1175 /* Note that the vendor-specific code below might override */
1177 /* Intel-defined flags: level 0x00000001 */
1178 if (c->cpuid_level >= 0x00000001) {
1179 __u32 misc;
1180 cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
1181 &c->x86_capability[0]);
1182 c->x86 = (tfms >> 8) & 0xf;
1183 c->x86_model = (tfms >> 4) & 0xf;
1184 c->x86_mask = tfms & 0xf;
1185 if (c->x86 == 0xf) {
1186 c->x86 += (tfms >> 20) & 0xff;
1187 c->x86_model += ((tfms >> 16) & 0xF) << 4;
1189 if (c->x86_capability[0] & (1<<19))
1190 c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
1191 } else {
1192 /* Have CPUID level 0 only - unheard of */
1193 c->x86 = 4;
1196 #ifdef CONFIG_SMP
1197 phys_proc_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff;
1198 #endif
1201 /*
1202 * This does the hard work of actually picking apart the CPU stuff...
1203 */
1204 void __init identify_cpu(struct cpuinfo_x86 *c)
1206 int i;
1207 u32 xlvl;
1209 early_identify_cpu(c);
1211 /* AMD-defined flags: level 0x80000001 */
1212 xlvl = cpuid_eax(0x80000000);
1213 c->extended_cpuid_level = xlvl;
1214 if ((xlvl & 0xffff0000) == 0x80000000) {
1215 if (xlvl >= 0x80000001) {
1216 c->x86_capability[1] = cpuid_edx(0x80000001);
1217 c->x86_capability[6] = cpuid_ecx(0x80000001);
1219 if (xlvl >= 0x80000004)
1220 get_model_name(c); /* Default name */
1223 /* Transmeta-defined flags: level 0x80860001 */
1224 xlvl = cpuid_eax(0x80860000);
1225 if ((xlvl & 0xffff0000) == 0x80860000) {
1226 /* Don't set x86_cpuid_level here for now to not confuse. */
1227 if (xlvl >= 0x80860001)
1228 c->x86_capability[2] = cpuid_edx(0x80860001);
1231 /*
1232 * Vendor-specific initialization. In this section we
1233 * canonicalize the feature flags, meaning if there are
1234 * features a certain CPU supports which CPUID doesn't
1235 * tell us, CPUID claiming incorrect flags, or other bugs,
1236 * we handle them here.
1238 * At the end of this section, c->x86_capability better
1239 * indicate the features this CPU genuinely supports!
1240 */
1241 switch (c->x86_vendor) {
1242 case X86_VENDOR_AMD:
1243 init_amd(c);
1244 break;
1246 case X86_VENDOR_INTEL:
1247 init_intel(c);
1248 break;
1250 case X86_VENDOR_UNKNOWN:
1251 default:
1252 display_cacheinfo(c);
1253 break;
1256 select_idle_routine(c);
1257 detect_ht(c);
1259 /*
1260 * On SMP, boot_cpu_data holds the common feature set between
1261 * all CPUs; so make sure that we indicate which features are
1262 * common between the CPUs. The first time this routine gets
1263 * executed, c == &boot_cpu_data.
1264 */
1265 if (c != &boot_cpu_data) {
1266 /* AND the already accumulated flags with these */
1267 for (i = 0 ; i < NCAPINTS ; i++)
1268 boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
1271 #ifdef CONFIG_X86_MCE
1272 mcheck_init(c);
1273 #endif
1274 #ifdef CONFIG_NUMA
1275 if (c != &boot_cpu_data)
1276 numa_add_cpu(c - cpu_data);
1277 #endif
1281 void __init print_cpu_info(struct cpuinfo_x86 *c)
1283 if (c->x86_model_id[0])
1284 printk("%s", c->x86_model_id);
1286 if (c->x86_mask || c->cpuid_level >= 0)
1287 printk(" stepping %02x\n", c->x86_mask);
1288 else
1289 printk("\n");
1292 /*
1293 * Get CPU information for use by the procfs.
1294 */
1296 static int show_cpuinfo(struct seq_file *m, void *v)
1298 struct cpuinfo_x86 *c = v;
1300 /*
1301 * These flag bits must match the definitions in <asm/cpufeature.h>.
1302 * NULL means this bit is undefined or reserved; either way it doesn't
1303 * have meaning as far as Linux is concerned. Note that it's important
1304 * to realize there is a difference between this table and CPUID -- if
1305 * applications want to get the raw CPUID data, they should access
1306 * /dev/cpu/<cpu_nr>/cpuid instead.
1307 */
1308 static char *x86_cap_flags[] = {
1309 /* Intel-defined */
1310 "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
1311 "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
1312 "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
1313 "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL,
1315 /* AMD-defined */
1316 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1317 NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
1318 NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
1319 NULL, "fxsr_opt", NULL, NULL, NULL, "lm", "3dnowext", "3dnow",
1321 /* Transmeta-defined */
1322 "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
1323 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1324 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1325 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1327 /* Other (Linux-defined) */
1328 "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
1329 "constant_tsc", NULL, NULL,
1330 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1331 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1332 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1334 /* Intel-defined (#2) */
1335 "pni", NULL, NULL, "monitor", "ds_cpl", NULL, NULL, "est",
1336 "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
1337 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1338 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1340 /* VIA/Cyrix/Centaur-defined */
1341 NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
1342 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1343 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1344 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1346 /* AMD-defined (#2) */
1347 "lahf_lm", "cmp_legacy", NULL, NULL, NULL, NULL, NULL, NULL,
1348 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1349 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1350 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1351 };
1352 static char *x86_power_flags[] = {
1353 "ts", /* temperature sensor */
1354 "fid", /* frequency id control */
1355 "vid", /* voltage id control */
1356 "ttp", /* thermal trip */
1357 "tm",
1358 "stc"
1359 };
1362 #ifdef CONFIG_SMP
1363 if (!cpu_online(c-cpu_data))
1364 return 0;
1365 #endif
1367 seq_printf(m,"processor\t: %u\n"
1368 "vendor_id\t: %s\n"
1369 "cpu family\t: %d\n"
1370 "model\t\t: %d\n"
1371 "model name\t: %s\n",
1372 (unsigned)(c-cpu_data),
1373 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
1374 c->x86,
1375 (int)c->x86_model,
1376 c->x86_model_id[0] ? c->x86_model_id : "unknown");
1378 if (c->x86_mask || c->cpuid_level >= 0)
1379 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
1380 else
1381 seq_printf(m, "stepping\t: unknown\n");
1383 if (cpu_has(c,X86_FEATURE_TSC)) {
1384 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
1385 cpu_khz / 1000, (cpu_khz % 1000));
1388 /* Cache size */
1389 if (c->x86_cache_size >= 0)
1390 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
1392 #ifdef CONFIG_SMP
1393 if (smp_num_siblings * c->x86_num_cores > 1) {
1394 int cpu = c - cpu_data;
1395 seq_printf(m, "physical id\t: %d\n", phys_proc_id[cpu]);
1396 seq_printf(m, "siblings\t: %d\n",
1397 c->x86_num_cores * smp_num_siblings);
1398 seq_printf(m, "core id\t\t: %d\n", cpu_core_id[cpu]);
1399 seq_printf(m, "cpu cores\t: %d\n", c->x86_num_cores);
1401 #endif
1403 seq_printf(m,
1404 "fpu\t\t: yes\n"
1405 "fpu_exception\t: yes\n"
1406 "cpuid level\t: %d\n"
1407 "wp\t\t: yes\n"
1408 "flags\t\t:",
1409 c->cpuid_level);
1412 int i;
1413 for ( i = 0 ; i < 32*NCAPINTS ; i++ )
1414 if ( test_bit(i, &c->x86_capability) &&
1415 x86_cap_flags[i] != NULL )
1416 seq_printf(m, " %s", x86_cap_flags[i]);
1419 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
1420 c->loops_per_jiffy/(500000/HZ),
1421 (c->loops_per_jiffy/(5000/HZ)) % 100);
1423 if (c->x86_tlbsize > 0)
1424 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
1425 seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
1426 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
1428 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
1429 c->x86_phys_bits, c->x86_virt_bits);
1431 seq_printf(m, "power management:");
1433 unsigned i;
1434 for (i = 0; i < 32; i++)
1435 if (c->x86_power & (1 << i)) {
1436 if (i < ARRAY_SIZE(x86_power_flags))
1437 seq_printf(m, " %s", x86_power_flags[i]);
1438 else
1439 seq_printf(m, " [%d]", i);
1443 seq_printf(m, "\n\n");
1445 return 0;
1448 static void *c_start(struct seq_file *m, loff_t *pos)
1450 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
1453 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1455 ++*pos;
1456 return c_start(m, pos);
1459 static void c_stop(struct seq_file *m, void *v)
1463 struct seq_operations cpuinfo_op = {
1464 .start =c_start,
1465 .next = c_next,
1466 .stop = c_stop,
1467 .show = show_cpuinfo,
1468 };