blob: 26524ce3b239a70a0eb68402a4557c478a9d40c3 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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.
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 */
9
10/*
11 * This file handles the architecture-dependent parts of initialization
12 */
13
14#include <linux/errno.h>
15#include <linux/sched.h>
16#include <linux/kernel.h>
17#include <linux/mm.h>
18#include <linux/stddef.h>
19#include <linux/unistd.h>
20#include <linux/ptrace.h>
21#include <linux/slab.h>
22#include <linux/user.h>
23#include <linux/a.out.h>
Jon Smirl894673e2006-07-10 04:44:13 -070024#include <linux/screen_info.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/ioport.h>
26#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/init.h>
28#include <linux/initrd.h>
29#include <linux/highmem.h>
30#include <linux/bootmem.h>
31#include <linux/module.h>
32#include <asm/processor.h>
33#include <linux/console.h>
34#include <linux/seq_file.h>
Vivek Goyalaac04b32006-01-09 20:51:47 -080035#include <linux/crash_dump.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/root_dev.h>
37#include <linux/pci.h>
38#include <linux/acpi.h>
39#include <linux/kallsyms.h>
40#include <linux/edd.h>
Matt Tolentinobbfceef2005-06-23 00:08:07 -070041#include <linux/mmzone.h>
Eric W. Biederman5f5609d2005-06-25 14:58:04 -070042#include <linux/kexec.h>
Venkatesh Pallipadi95235ca2005-12-02 10:43:20 -080043#include <linux/cpufreq.h>
Andi Kleene9928672006-01-11 22:43:33 +010044#include <linux/dmi.h>
Muli Ben-Yehuda17a941d2006-01-11 22:44:42 +010045#include <linux/dma-mapping.h>
Andi Kleen681558f2006-03-25 16:29:46 +010046#include <linux/ctype.h>
Matt Tolentinobbfceef2005-06-23 00:08:07 -070047
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#include <asm/mtrr.h>
49#include <asm/uaccess.h>
50#include <asm/system.h>
51#include <asm/io.h>
52#include <asm/smp.h>
53#include <asm/msr.h>
54#include <asm/desc.h>
55#include <video/edid.h>
56#include <asm/e820.h>
57#include <asm/dma.h>
58#include <asm/mpspec.h>
59#include <asm/mmu_context.h>
60#include <asm/bootsetup.h>
61#include <asm/proto.h>
62#include <asm/setup.h>
63#include <asm/mach_apic.h>
64#include <asm/numa.h>
Andi Kleen2bc04142005-11-05 17:25:53 +010065#include <asm/sections.h>
Andi Kleenf2d3efe2006-03-25 16:30:22 +010066#include <asm/dmi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
68/*
69 * Machine setup..
70 */
71
Ravikiran G Thirumalai6c231b72005-09-06 15:17:45 -070072struct cpuinfo_x86 boot_cpu_data __read_mostly;
Andi Kleen2ee60e172006-06-26 13:59:44 +020073EXPORT_SYMBOL(boot_cpu_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
75unsigned long mmu_cr4_features;
76
Linus Torvalds1da177e2005-04-16 15:20:36 -070077/* Boot loader ID as an integer, for the benefit of proc_dointvec */
78int bootloader_type;
79
80unsigned long saved_video_mode;
81
Andi Kleenf2d3efe2006-03-25 16:30:22 +010082/*
83 * Early DMI memory
84 */
85int dmi_alloc_index;
86char dmi_alloc_data[DMI_MAX_DATA];
87
Linus Torvalds1da177e2005-04-16 15:20:36 -070088/*
89 * Setup options
90 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070091struct screen_info screen_info;
Andi Kleen2ee60e172006-06-26 13:59:44 +020092EXPORT_SYMBOL(screen_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093struct sys_desc_table_struct {
94 unsigned short length;
95 unsigned char table[0];
96};
97
98struct edid_info edid_info;
Antonino A. Daplasba707102006-06-26 00:26:37 -070099EXPORT_SYMBOL_GPL(edid_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
101extern int root_mountflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
103char command_line[COMMAND_LINE_SIZE];
104
105struct resource standard_io_resources[] = {
106 { .name = "dma1", .start = 0x00, .end = 0x1f,
107 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
108 { .name = "pic1", .start = 0x20, .end = 0x21,
109 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
110 { .name = "timer0", .start = 0x40, .end = 0x43,
111 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
112 { .name = "timer1", .start = 0x50, .end = 0x53,
113 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
114 { .name = "keyboard", .start = 0x60, .end = 0x6f,
115 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
116 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
117 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
118 { .name = "pic2", .start = 0xa0, .end = 0xa1,
119 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
120 { .name = "dma2", .start = 0xc0, .end = 0xdf,
121 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
122 { .name = "fpu", .start = 0xf0, .end = 0xff,
123 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
124};
125
126#define STANDARD_IO_RESOURCES \
127 (sizeof standard_io_resources / sizeof standard_io_resources[0])
128
129#define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
130
131struct resource data_resource = {
132 .name = "Kernel data",
133 .start = 0,
134 .end = 0,
135 .flags = IORESOURCE_RAM,
136};
137struct resource code_resource = {
138 .name = "Kernel code",
139 .start = 0,
140 .end = 0,
141 .flags = IORESOURCE_RAM,
142};
143
144#define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)
145
146static struct resource system_rom_resource = {
147 .name = "System ROM",
148 .start = 0xf0000,
149 .end = 0xfffff,
150 .flags = IORESOURCE_ROM,
151};
152
153static struct resource extension_rom_resource = {
154 .name = "Extension ROM",
155 .start = 0xe0000,
156 .end = 0xeffff,
157 .flags = IORESOURCE_ROM,
158};
159
160static struct resource adapter_rom_resources[] = {
161 { .name = "Adapter ROM", .start = 0xc8000, .end = 0,
162 .flags = IORESOURCE_ROM },
163 { .name = "Adapter ROM", .start = 0, .end = 0,
164 .flags = IORESOURCE_ROM },
165 { .name = "Adapter ROM", .start = 0, .end = 0,
166 .flags = IORESOURCE_ROM },
167 { .name = "Adapter ROM", .start = 0, .end = 0,
168 .flags = IORESOURCE_ROM },
169 { .name = "Adapter ROM", .start = 0, .end = 0,
170 .flags = IORESOURCE_ROM },
171 { .name = "Adapter ROM", .start = 0, .end = 0,
172 .flags = IORESOURCE_ROM }
173};
174
175#define ADAPTER_ROM_RESOURCES \
176 (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
177
178static struct resource video_rom_resource = {
179 .name = "Video ROM",
180 .start = 0xc0000,
181 .end = 0xc7fff,
182 .flags = IORESOURCE_ROM,
183};
184
185static struct resource video_ram_resource = {
186 .name = "Video RAM area",
187 .start = 0xa0000,
188 .end = 0xbffff,
189 .flags = IORESOURCE_RAM,
190};
191
192#define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
193
194static int __init romchecksum(unsigned char *rom, unsigned long length)
195{
196 unsigned char *p, sum = 0;
197
198 for (p = rom; p < rom + length; p++)
199 sum += *p;
200 return sum == 0;
201}
202
203static void __init probe_roms(void)
204{
205 unsigned long start, length, upper;
206 unsigned char *rom;
207 int i;
208
209 /* video rom */
210 upper = adapter_rom_resources[0].start;
211 for (start = video_rom_resource.start; start < upper; start += 2048) {
212 rom = isa_bus_to_virt(start);
213 if (!romsignature(rom))
214 continue;
215
216 video_rom_resource.start = start;
217
218 /* 0 < length <= 0x7f * 512, historically */
219 length = rom[2] * 512;
220
221 /* if checksum okay, trust length byte */
222 if (length && romchecksum(rom, length))
223 video_rom_resource.end = start + length - 1;
224
225 request_resource(&iomem_resource, &video_rom_resource);
226 break;
227 }
228
229 start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
230 if (start < upper)
231 start = upper;
232
233 /* system rom */
234 request_resource(&iomem_resource, &system_rom_resource);
235 upper = system_rom_resource.start;
236
237 /* check for extension rom (ignore length byte!) */
238 rom = isa_bus_to_virt(extension_rom_resource.start);
239 if (romsignature(rom)) {
240 length = extension_rom_resource.end - extension_rom_resource.start + 1;
241 if (romchecksum(rom, length)) {
242 request_resource(&iomem_resource, &extension_rom_resource);
243 upper = extension_rom_resource.start;
244 }
245 }
246
247 /* check for adapter roms on 2k boundaries */
248 for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
249 rom = isa_bus_to_virt(start);
250 if (!romsignature(rom))
251 continue;
252
253 /* 0 < length <= 0x7f * 512, historically */
254 length = rom[2] * 512;
255
256 /* but accept any length that fits if checksum okay */
257 if (!length || start + length > upper || !romchecksum(rom, length))
258 continue;
259
260 adapter_rom_resources[i].start = start;
261 adapter_rom_resources[i].end = start + length - 1;
262 request_resource(&iomem_resource, &adapter_rom_resources[i]);
263
264 start = adapter_rom_resources[i++].end & ~2047UL;
265 }
266}
267
Vivek Goyalaac04b32006-01-09 20:51:47 -0800268#ifdef CONFIG_PROC_VMCORE
Andi Kleen2c8c0e62006-09-26 10:52:32 +0200269/* elfcorehdr= specifies the location of elf core header
270 * stored by the crashed kernel. This option will be passed
271 * by kexec loader to the capture kernel.
272 */
273static int __init setup_elfcorehdr(char *arg)
274{
275 char *end;
276 if (!arg)
277 return -EINVAL;
278 elfcorehdr_addr = memparse(arg, &end);
279 return end > arg ? 0 : -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280}
Andi Kleen2c8c0e62006-09-26 10:52:32 +0200281early_param("elfcorehdr", setup_elfcorehdr);
282#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283
Matt Tolentino2b976902005-06-23 00:08:06 -0700284#ifndef CONFIG_NUMA
Matt Tolentinobbfceef2005-06-23 00:08:07 -0700285static void __init
286contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287{
Matt Tolentinobbfceef2005-06-23 00:08:07 -0700288 unsigned long bootmap_size, bootmap;
289
Matt Tolentinobbfceef2005-06-23 00:08:07 -0700290 bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
291 bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
292 if (bootmap == -1L)
293 panic("Cannot find bootmem map of size %ld\n",bootmap_size);
294 bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
295 e820_bootmem_free(NODE_DATA(0), 0, end_pfn << PAGE_SHIFT);
296 reserve_bootmem(bootmap, bootmap_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297}
298#endif
299
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
301struct edd edd;
302#ifdef CONFIG_EDD_MODULE
303EXPORT_SYMBOL(edd);
304#endif
305/**
306 * copy_edd() - Copy the BIOS EDD information
307 * from boot_params into a safe place.
308 *
309 */
310static inline void copy_edd(void)
311{
312 memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
313 memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
314 edd.mbr_signature_nr = EDD_MBR_SIG_NR;
315 edd.edd_info_nr = EDD_NR;
316}
317#else
318static inline void copy_edd(void)
319{
320}
321#endif
322
323#define EBDA_ADDR_POINTER 0x40E
Andi Kleenac71d122006-05-08 15:17:28 +0200324
325unsigned __initdata ebda_addr;
326unsigned __initdata ebda_size;
327
328static void discover_ebda(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329{
Andi Kleenac71d122006-05-08 15:17:28 +0200330 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 * there is a real-mode segmented pointer pointing to the
332 * 4K EBDA area at 0x40E
333 */
Andi Kleenac71d122006-05-08 15:17:28 +0200334 ebda_addr = *(unsigned short *)EBDA_ADDR_POINTER;
335 ebda_addr <<= 4;
336
337 ebda_size = *(unsigned short *)(unsigned long)ebda_addr;
338
339 /* Round EBDA up to pages */
340 if (ebda_size == 0)
341 ebda_size = 1;
342 ebda_size <<= 10;
343 ebda_size = round_up(ebda_size + (ebda_addr & ~PAGE_MASK), PAGE_SIZE);
344 if (ebda_size > 64*1024)
345 ebda_size = 64*1024;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346}
347
348void __init setup_arch(char **cmdline_p)
349{
Andi Kleen43c85c92006-09-26 10:52:32 +0200350 printk(KERN_INFO "Command line: %s\n", saved_command_line);
351
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 screen_info = SCREEN_INFO;
354 edid_info = EDID_INFO;
355 saved_video_mode = SAVED_VIDEO_MODE;
356 bootloader_type = LOADER_TYPE;
357
358#ifdef CONFIG_BLK_DEV_RAM
359 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
360 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
361 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
362#endif
363 setup_memory_region();
364 copy_edd();
365
366 if (!MOUNT_ROOT_RDONLY)
367 root_mountflags &= ~MS_RDONLY;
368 init_mm.start_code = (unsigned long) &_text;
369 init_mm.end_code = (unsigned long) &_etext;
370 init_mm.end_data = (unsigned long) &_edata;
371 init_mm.brk = (unsigned long) &_end;
372
373 code_resource.start = virt_to_phys(&_text);
374 code_resource.end = virt_to_phys(&_etext)-1;
375 data_resource.start = virt_to_phys(&_etext);
376 data_resource.end = virt_to_phys(&_edata)-1;
377
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 early_identify_cpu(&boot_cpu_data);
379
Andi Kleen2c8c0e62006-09-26 10:52:32 +0200380 strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
381 *cmdline_p = command_line;
382
383 parse_early_param();
384
385 finish_e820_parsing();
Andi Kleen9ca33eb2006-09-26 10:52:32 +0200386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 /*
388 * partially used pages are not usable - thus
389 * we are rounding upwards:
390 */
391 end_pfn = e820_end_of_ram();
Jan Beulichcaff0712006-09-26 10:52:31 +0200392 num_physpages = end_pfn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
394 check_efer();
395
Andi Kleenac71d122006-05-08 15:17:28 +0200396 discover_ebda();
397
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
399
Andi Kleenf2d3efe2006-03-25 16:30:22 +0100400 dmi_scan_machine();
401
Siddha, Suresh Bf6c2e332005-11-05 17:25:53 +0100402 zap_low_mappings(0);
403
Len Brown888ba6c2005-08-24 12:07:20 -0400404#ifdef CONFIG_ACPI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 /*
406 * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
407 * Call this early for SRAT node setup.
408 */
409 acpi_boot_table_init();
410#endif
411
Jan Beulichcaff0712006-09-26 10:52:31 +0200412 /* How many end-of-memory variables you have, grandma! */
413 max_low_pfn = end_pfn;
414 max_pfn = end_pfn;
415 high_memory = (void *)__va(end_pfn * PAGE_SIZE - 1) + 1;
416
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417#ifdef CONFIG_ACPI_NUMA
418 /*
419 * Parse SRAT to discover nodes.
420 */
421 acpi_numa_init();
422#endif
423
Matt Tolentino2b976902005-06-23 00:08:06 -0700424#ifdef CONFIG_NUMA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 numa_initmem_init(0, end_pfn);
426#else
Matt Tolentinobbfceef2005-06-23 00:08:07 -0700427 contig_initmem_init(0, end_pfn);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428#endif
429
430 /* Reserve direct mapping */
431 reserve_bootmem_generic(table_start << PAGE_SHIFT,
432 (table_end - table_start) << PAGE_SHIFT);
433
434 /* reserve kernel */
Andi Kleenceee8822006-08-30 19:37:12 +0200435 reserve_bootmem_generic(__pa_symbol(&_text),
436 __pa_symbol(&_end) - __pa_symbol(&_text));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
438 /*
439 * reserve physical page 0 - it's a special BIOS page on many boxes,
440 * enabling clean reboots, SMP operation, laptop functions.
441 */
442 reserve_bootmem_generic(0, PAGE_SIZE);
443
444 /* reserve ebda region */
Andi Kleenac71d122006-05-08 15:17:28 +0200445 if (ebda_addr)
446 reserve_bootmem_generic(ebda_addr, ebda_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
448#ifdef CONFIG_SMP
449 /*
450 * But first pinch a few for the stack/trampoline stuff
451 * FIXME: Don't need the extra page at 4K, but need to fix
452 * trampoline before removing it. (see the GDT stuff)
453 */
454 reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);
455
456 /* Reserve SMP trampoline */
457 reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
458#endif
459
460#ifdef CONFIG_ACPI_SLEEP
461 /*
462 * Reserve low memory region for sleep support.
463 */
464 acpi_reserve_bootmem();
465#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 /*
467 * Find and reserve possible boot-time SMP configuration:
468 */
469 find_smp_config();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470#ifdef CONFIG_BLK_DEV_INITRD
471 if (LOADER_TYPE && INITRD_START) {
472 if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
473 reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
474 initrd_start =
475 INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
476 initrd_end = initrd_start+INITRD_SIZE;
477 }
478 else {
479 printk(KERN_ERR "initrd extends beyond end of memory "
480 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
481 (unsigned long)(INITRD_START + INITRD_SIZE),
482 (unsigned long)(end_pfn << PAGE_SHIFT));
483 initrd_start = 0;
484 }
485 }
486#endif
Eric W. Biederman5f5609d2005-06-25 14:58:04 -0700487#ifdef CONFIG_KEXEC
488 if (crashk_res.start != crashk_res.end) {
Amul Shah00212fe2006-06-25 05:49:31 -0700489 reserve_bootmem_generic(crashk_res.start,
Eric W. Biederman5f5609d2005-06-25 14:58:04 -0700490 crashk_res.end - crashk_res.start + 1);
491 }
492#endif
Eric W. Biederman0d317fb2005-08-06 13:47:36 -0600493
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 paging_init();
495
Andi Kleendfa46982006-09-26 10:52:30 +0200496 early_quirks();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497
Ashok Raj51f62e12006-03-25 16:29:28 +0100498 /*
499 * set this early, so we dont allocate cpu0
500 * if MADT list doesnt list BSP first
501 * mpparse.c/MP_processor_info() allocates logical cpu numbers.
502 */
503 cpu_set(0, cpu_present_map);
Len Brown888ba6c2005-08-24 12:07:20 -0400504#ifdef CONFIG_ACPI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 /*
506 * Read APIC and some other early information from ACPI tables.
507 */
508 acpi_boot_init();
509#endif
510
Ravikiran Thirumalai05b3cbd2006-01-11 22:45:36 +0100511 init_cpu_to_node();
512
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 /*
514 * get boot-time SMP configuration:
515 */
516 if (smp_found_config)
517 get_smp_config();
518 init_apic_mappings();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
520 /*
521 * Request address space for all standard RAM and ROM resources
522 * and also for regions reported as reserved by the e820.
523 */
524 probe_roms();
525 e820_reserve_resources();
526
527 request_resource(&iomem_resource, &video_ram_resource);
528
529 {
530 unsigned i;
531 /* request I/O space for devices used on all i[345]86 PCs */
532 for (i = 0; i < STANDARD_IO_RESOURCES; i++)
533 request_resource(&ioport_resource, &standard_io_resources[i]);
534 }
535
Andi Kleena1e97782005-04-16 15:25:12 -0700536 e820_setup_gap();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538#ifdef CONFIG_VT
539#if defined(CONFIG_VGA_CONSOLE)
540 conswitchp = &vga_con;
541#elif defined(CONFIG_DUMMY_CONSOLE)
542 conswitchp = &dummy_con;
543#endif
544#endif
545}
546
Ashok Raje6982c62005-06-25 14:54:58 -0700547static int __cpuinit get_model_name(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548{
549 unsigned int *v;
550
Andi Kleenebfcaa92005-04-16 15:25:18 -0700551 if (c->extended_cpuid_level < 0x80000004)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 return 0;
553
554 v = (unsigned int *) c->x86_model_id;
555 cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
556 cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
557 cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
558 c->x86_model_id[48] = 0;
559 return 1;
560}
561
562
Ashok Raje6982c62005-06-25 14:54:58 -0700563static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564{
565 unsigned int n, dummy, eax, ebx, ecx, edx;
566
Andi Kleenebfcaa92005-04-16 15:25:18 -0700567 n = c->extended_cpuid_level;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
569 if (n >= 0x80000005) {
570 cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
571 printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
572 edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
573 c->x86_cache_size=(ecx>>24)+(edx>>24);
574 /* On K8 L1 TLB is inclusive, so don't count it */
575 c->x86_tlbsize = 0;
576 }
577
578 if (n >= 0x80000006) {
579 cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
580 ecx = cpuid_ecx(0x80000006);
581 c->x86_cache_size = ecx >> 16;
582 c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
583
584 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
585 c->x86_cache_size, ecx & 0xFF);
586 }
587
588 if (n >= 0x80000007)
589 cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power);
590 if (n >= 0x80000008) {
591 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
592 c->x86_virt_bits = (eax >> 8) & 0xff;
593 c->x86_phys_bits = eax & 0xff;
594 }
595}
596
Andi Kleen3f098c22005-09-12 18:49:24 +0200597#ifdef CONFIG_NUMA
598static int nearby_node(int apicid)
599{
600 int i;
601 for (i = apicid - 1; i >= 0; i--) {
602 int node = apicid_to_node[i];
603 if (node != NUMA_NO_NODE && node_online(node))
604 return node;
605 }
606 for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) {
607 int node = apicid_to_node[i];
608 if (node != NUMA_NO_NODE && node_online(node))
609 return node;
610 }
611 return first_node(node_online_map); /* Shouldn't happen */
612}
613#endif
614
Andi Kleen63518642005-04-16 15:25:16 -0700615/*
616 * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
617 * Assumes number of cores is a power of two.
618 */
619static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
620{
621#ifdef CONFIG_SMP
Andi Kleenb41e2932005-05-20 14:27:55 -0700622 unsigned bits;
Andi Kleen3f098c22005-09-12 18:49:24 +0200623#ifdef CONFIG_NUMA
Rohit Sethf3fa8eb2006-06-26 13:58:17 +0200624 int cpu = smp_processor_id();
Andi Kleen3f098c22005-09-12 18:49:24 +0200625 int node = 0;
Ravikiran G Thirumalai60c1bc82006-03-25 16:30:04 +0100626 unsigned apicid = hard_smp_processor_id();
Andi Kleen3f098c22005-09-12 18:49:24 +0200627#endif
Andi Kleenfaee9a52006-06-26 13:56:10 +0200628 unsigned ecx = cpuid_ecx(0x80000008);
Andi Kleenb41e2932005-05-20 14:27:55 -0700629
Andi Kleenfaee9a52006-06-26 13:56:10 +0200630 c->x86_max_cores = (ecx & 0xff) + 1;
631
632 /* CPU telling us the core id bits shift? */
633 bits = (ecx >> 12) & 0xF;
634
635 /* Otherwise recompute */
636 if (bits == 0) {
637 while ((1 << bits) < c->x86_max_cores)
638 bits++;
639 }
Andi Kleenb41e2932005-05-20 14:27:55 -0700640
641 /* Low order bits define the core id (index of core in socket) */
Rohit Sethf3fa8eb2006-06-26 13:58:17 +0200642 c->cpu_core_id = c->phys_proc_id & ((1 << bits)-1);
Andi Kleenb41e2932005-05-20 14:27:55 -0700643 /* Convert the APIC ID into the socket ID */
Rohit Sethf3fa8eb2006-06-26 13:58:17 +0200644 c->phys_proc_id = phys_pkg_id(bits);
Andi Kleen63518642005-04-16 15:25:16 -0700645
646#ifdef CONFIG_NUMA
Rohit Sethf3fa8eb2006-06-26 13:58:17 +0200647 node = c->phys_proc_id;
Andi Kleen3f098c22005-09-12 18:49:24 +0200648 if (apicid_to_node[apicid] != NUMA_NO_NODE)
649 node = apicid_to_node[apicid];
650 if (!node_online(node)) {
651 /* Two possibilities here:
652 - The CPU is missing memory and no node was created.
653 In that case try picking one from a nearby CPU
654 - The APIC IDs differ from the HyperTransport node IDs
655 which the K8 northbridge parsing fills in.
656 Assume they are all increased by a constant offset,
657 but in the same order as the HT nodeids.
658 If that doesn't result in a usable node fall back to the
659 path for the previous case. */
Rohit Sethf3fa8eb2006-06-26 13:58:17 +0200660 int ht_nodeid = apicid - (cpu_data[0].phys_proc_id << bits);
Andi Kleen3f098c22005-09-12 18:49:24 +0200661 if (ht_nodeid >= 0 &&
662 apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
663 node = apicid_to_node[ht_nodeid];
664 /* Pick a nearby node */
665 if (!node_online(node))
666 node = nearby_node(apicid);
667 }
Andi Kleen69d81fc2005-11-05 17:25:53 +0100668 numa_set_node(cpu, node);
Andi Kleena1586082005-05-16 21:53:21 -0700669
Rohit Sethe42f9432006-06-26 13:59:14 +0200670 printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
Andi Kleen3f098c22005-09-12 18:49:24 +0200671#endif
Andi Kleen63518642005-04-16 15:25:16 -0700672#endif
673}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674
Magnus Dammed775042006-09-26 10:52:36 +0200675static void __cpuinit init_amd(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676{
Andi Kleen7bcd3f32006-02-03 21:51:02 +0100677 unsigned level;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
Linus Torvaldsbc5e8fd2005-09-17 15:41:04 -0700679#ifdef CONFIG_SMP
680 unsigned long value;
681
Andi Kleen7d318d72005-09-29 22:05:55 +0200682 /*
683 * Disable TLB flush filter by setting HWCR.FFDIS on K8
684 * bit 6 of msr C001_0015
685 *
686 * Errata 63 for SH-B3 steppings
687 * Errata 122 for all steppings (F+ have it disabled by default)
688 */
689 if (c->x86 == 15) {
690 rdmsrl(MSR_K8_HWCR, value);
691 value |= 1 << 6;
692 wrmsrl(MSR_K8_HWCR, value);
693 }
Linus Torvaldsbc5e8fd2005-09-17 15:41:04 -0700694#endif
695
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
697 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
698 clear_bit(0*32+31, &c->x86_capability);
699
Andi Kleen7bcd3f32006-02-03 21:51:02 +0100700 /* On C+ stepping K8 rep microcode works well for copy/memset */
701 level = cpuid_eax(1);
702 if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58))
703 set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
704
Andi Kleen18bd0572006-04-20 02:36:45 +0200705 /* Enable workaround for FXSAVE leak */
706 if (c->x86 >= 6)
707 set_bit(X86_FEATURE_FXSAVE_LEAK, &c->x86_capability);
708
Rohit Sethe42f9432006-06-26 13:59:14 +0200709 level = get_model_name(c);
710 if (!level) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 switch (c->x86) {
712 case 15:
713 /* Should distinguish Models here, but this is only
714 a fallback anyways. */
715 strcpy(c->x86_model_id, "Hammer");
716 break;
717 }
718 }
719 display_cacheinfo(c);
720
Andi Kleen130951c2006-01-11 22:42:02 +0100721 /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
722 if (c->x86_power & (1<<8))
723 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
724
Andi Kleenfaee9a52006-06-26 13:56:10 +0200725 /* Multi core CPU? */
726 if (c->extended_cpuid_level >= 0x80000008)
Andi Kleen63518642005-04-16 15:25:16 -0700727 amd_detect_cmp(c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728
Andi Kleen240cd6a802006-06-26 13:56:13 +0200729 /* Fix cpuid4 emulation for more */
730 num_cache_leaves = 3;
Andi Kleen20493362006-09-26 10:52:41 +0200731
732 /* When there is only one core no need to synchronize RDTSC */
733 if (num_possible_cpus() == 1)
734 set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
735 else
736 clear_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737}
738
Ashok Raje6982c62005-06-25 14:54:58 -0700739static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740{
741#ifdef CONFIG_SMP
742 u32 eax, ebx, ecx, edx;
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100743 int index_msb, core_bits;
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100744
745 cpuid(1, &eax, &ebx, &ecx, &edx);
746
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100747
Rohit Sethe42f9432006-06-26 13:59:14 +0200748 if (!cpu_has(c, X86_FEATURE_HT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 return;
Rohit Sethe42f9432006-06-26 13:59:14 +0200750 if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
751 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 smp_num_siblings = (ebx & 0xff0000) >> 16;
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100754
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 if (smp_num_siblings == 1) {
756 printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100757 } else if (smp_num_siblings > 1 ) {
758
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 if (smp_num_siblings > NR_CPUS) {
760 printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
761 smp_num_siblings = 1;
762 return;
763 }
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100764
765 index_msb = get_count_order(smp_num_siblings);
Rohit Sethf3fa8eb2006-06-26 13:58:17 +0200766 c->phys_proc_id = phys_pkg_id(index_msb);
Andi Kleen3dd9d512005-04-16 15:25:15 -0700767
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100768 smp_num_siblings = smp_num_siblings / c->x86_max_cores;
Andi Kleen3dd9d512005-04-16 15:25:15 -0700769
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100770 index_msb = get_count_order(smp_num_siblings) ;
Andi Kleen3dd9d512005-04-16 15:25:15 -0700771
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100772 core_bits = get_count_order(c->x86_max_cores);
Andi Kleen3dd9d512005-04-16 15:25:15 -0700773
Rohit Sethf3fa8eb2006-06-26 13:58:17 +0200774 c->cpu_core_id = phys_pkg_id(index_msb) &
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100775 ((1 << core_bits) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 }
Rohit Sethe42f9432006-06-26 13:59:14 +0200777out:
778 if ((c->x86_max_cores * smp_num_siblings) > 1) {
779 printk(KERN_INFO "CPU: Physical Processor ID: %d\n", c->phys_proc_id);
780 printk(KERN_INFO "CPU: Processor Core ID: %d\n", c->cpu_core_id);
781 }
782
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783#endif
784}
785
Andi Kleen3dd9d512005-04-16 15:25:15 -0700786/*
787 * find out the number of processor cores on the die
788 */
Ashok Raje6982c62005-06-25 14:54:58 -0700789static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
Andi Kleen3dd9d512005-04-16 15:25:15 -0700790{
Rohit Seth2bbc4192006-06-26 13:58:02 +0200791 unsigned int eax, t;
Andi Kleen3dd9d512005-04-16 15:25:15 -0700792
793 if (c->cpuid_level < 4)
794 return 1;
795
Rohit Seth2bbc4192006-06-26 13:58:02 +0200796 cpuid_count(4, 0, &eax, &t, &t, &t);
Andi Kleen3dd9d512005-04-16 15:25:15 -0700797
798 if (eax & 0x1f)
799 return ((eax >> 26) + 1);
800 else
801 return 1;
802}
803
Andi Kleendf0cc262005-09-12 18:49:24 +0200804static void srat_detect_node(void)
805{
806#ifdef CONFIG_NUMA
Ravikiran G Thirumalaiddea7be2005-10-03 10:36:28 -0700807 unsigned node;
Andi Kleendf0cc262005-09-12 18:49:24 +0200808 int cpu = smp_processor_id();
Rohit Sethe42f9432006-06-26 13:59:14 +0200809 int apicid = hard_smp_processor_id();
Andi Kleendf0cc262005-09-12 18:49:24 +0200810
811 /* Don't do the funky fallback heuristics the AMD version employs
812 for now. */
Rohit Sethe42f9432006-06-26 13:59:14 +0200813 node = apicid_to_node[apicid];
Andi Kleendf0cc262005-09-12 18:49:24 +0200814 if (node == NUMA_NO_NODE)
Daniel Yeisley0d015322006-05-30 22:47:57 +0200815 node = first_node(node_online_map);
Andi Kleen69d81fc2005-11-05 17:25:53 +0100816 numa_set_node(cpu, node);
Andi Kleendf0cc262005-09-12 18:49:24 +0200817
Andi Kleenc31fbb12006-09-26 10:52:33 +0200818 printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
Andi Kleendf0cc262005-09-12 18:49:24 +0200819#endif
820}
821
Ashok Raje6982c62005-06-25 14:54:58 -0700822static void __cpuinit init_intel(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823{
824 /* Cache sizes */
825 unsigned n;
826
827 init_intel_cacheinfo(c);
Venkatesh Pallipadi0080e662006-06-26 13:59:59 +0200828 if (c->cpuid_level > 9 ) {
829 unsigned eax = cpuid_eax(10);
830 /* Check for version and the number of counters */
831 if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
832 set_bit(X86_FEATURE_ARCH_PERFMON, &c->x86_capability);
833 }
834
Andi Kleenebfcaa92005-04-16 15:25:18 -0700835 n = c->extended_cpuid_level;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 if (n >= 0x80000008) {
837 unsigned eax = cpuid_eax(0x80000008);
838 c->x86_virt_bits = (eax >> 8) & 0xff;
839 c->x86_phys_bits = eax & 0xff;
Shaohua Liaf9c1422005-11-05 17:25:54 +0100840 /* CPUID workaround for Intel 0F34 CPU */
841 if (c->x86_vendor == X86_VENDOR_INTEL &&
842 c->x86 == 0xF && c->x86_model == 0x3 &&
843 c->x86_mask == 0x4)
844 c->x86_phys_bits = 36;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 }
846
847 if (c->x86 == 15)
848 c->x86_cache_alignment = c->x86_clflush_size * 2;
Andi Kleen39b3a792006-01-11 22:42:45 +0100849 if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
850 (c->x86 == 0x6 && c->x86_model >= 0x0e))
Andi Kleenc29601e2005-04-16 15:25:05 -0700851 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
Andi Kleen27fbe5b2006-09-26 10:52:41 +0200852 if (c->x86 == 6)
853 set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
Andi Kleenc818a182006-01-11 22:45:24 +0100854 set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100855 c->x86_max_cores = intel_num_cpu_cores(c);
Andi Kleendf0cc262005-09-12 18:49:24 +0200856
857 srat_detect_node();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858}
859
Adrian Bunk672289e2005-09-10 00:27:21 -0700860static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861{
862 char *v = c->x86_vendor_id;
863
864 if (!strcmp(v, "AuthenticAMD"))
865 c->x86_vendor = X86_VENDOR_AMD;
866 else if (!strcmp(v, "GenuineIntel"))
867 c->x86_vendor = X86_VENDOR_INTEL;
868 else
869 c->x86_vendor = X86_VENDOR_UNKNOWN;
870}
871
872struct cpu_model_info {
873 int vendor;
874 int family;
875 char *model_names[16];
876};
877
878/* Do some early cpuid on the boot CPU to get some parameter that are
879 needed before check_bugs. Everything advanced is in identify_cpu
880 below. */
Ashok Raje6982c62005-06-25 14:54:58 -0700881void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882{
883 u32 tfms;
884
885 c->loops_per_jiffy = loops_per_jiffy;
886 c->x86_cache_size = -1;
887 c->x86_vendor = X86_VENDOR_UNKNOWN;
888 c->x86_model = c->x86_mask = 0; /* So far unknown... */
889 c->x86_vendor_id[0] = '\0'; /* Unset */
890 c->x86_model_id[0] = '\0'; /* Unset */
891 c->x86_clflush_size = 64;
892 c->x86_cache_alignment = c->x86_clflush_size;
Siddha, Suresh B94605ef2005-11-05 17:25:54 +0100893 c->x86_max_cores = 1;
Andi Kleenebfcaa92005-04-16 15:25:18 -0700894 c->extended_cpuid_level = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 memset(&c->x86_capability, 0, sizeof c->x86_capability);
896
897 /* Get vendor name */
898 cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
899 (unsigned int *)&c->x86_vendor_id[0],
900 (unsigned int *)&c->x86_vendor_id[8],
901 (unsigned int *)&c->x86_vendor_id[4]);
902
903 get_cpu_vendor(c);
904
905 /* Initialize the standard set of capabilities */
906 /* Note that the vendor-specific code below might override */
907
908 /* Intel-defined flags: level 0x00000001 */
909 if (c->cpuid_level >= 0x00000001) {
910 __u32 misc;
911 cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
912 &c->x86_capability[0]);
913 c->x86 = (tfms >> 8) & 0xf;
914 c->x86_model = (tfms >> 4) & 0xf;
915 c->x86_mask = tfms & 0xf;
Suresh Siddhaf5f786d2005-11-05 17:25:53 +0100916 if (c->x86 == 0xf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 c->x86 += (tfms >> 20) & 0xff;
Suresh Siddhaf5f786d2005-11-05 17:25:53 +0100918 if (c->x86 >= 0x6)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 c->x86_model += ((tfms >> 16) & 0xF) << 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 if (c->x86_capability[0] & (1<<19))
921 c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 } else {
923 /* Have CPUID level 0 only - unheard of */
924 c->x86 = 4;
925 }
Andi Kleena1586082005-05-16 21:53:21 -0700926
927#ifdef CONFIG_SMP
Rohit Sethf3fa8eb2006-06-26 13:58:17 +0200928 c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
Andi Kleena1586082005-05-16 21:53:21 -0700929#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930}
931
932/*
933 * This does the hard work of actually picking apart the CPU stuff...
934 */
Ashok Raje6982c62005-06-25 14:54:58 -0700935void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936{
937 int i;
938 u32 xlvl;
939
940 early_identify_cpu(c);
941
942 /* AMD-defined flags: level 0x80000001 */
943 xlvl = cpuid_eax(0x80000000);
Andi Kleenebfcaa92005-04-16 15:25:18 -0700944 c->extended_cpuid_level = xlvl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 if ((xlvl & 0xffff0000) == 0x80000000) {
946 if (xlvl >= 0x80000001) {
947 c->x86_capability[1] = cpuid_edx(0x80000001);
H. Peter Anvin5b7abc62005-05-01 08:58:49 -0700948 c->x86_capability[6] = cpuid_ecx(0x80000001);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 }
950 if (xlvl >= 0x80000004)
951 get_model_name(c); /* Default name */
952 }
953
954 /* Transmeta-defined flags: level 0x80860001 */
955 xlvl = cpuid_eax(0x80860000);
956 if ((xlvl & 0xffff0000) == 0x80860000) {
957 /* Don't set x86_cpuid_level here for now to not confuse. */
958 if (xlvl >= 0x80860001)
959 c->x86_capability[2] = cpuid_edx(0x80860001);
960 }
961
Siddha, Suresh B1e9f28f2006-03-27 01:15:22 -0800962 c->apicid = phys_pkg_id(0);
963
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 /*
965 * Vendor-specific initialization. In this section we
966 * canonicalize the feature flags, meaning if there are
967 * features a certain CPU supports which CPUID doesn't
968 * tell us, CPUID claiming incorrect flags, or other bugs,
969 * we handle them here.
970 *
971 * At the end of this section, c->x86_capability better
972 * indicate the features this CPU genuinely supports!
973 */
974 switch (c->x86_vendor) {
975 case X86_VENDOR_AMD:
976 init_amd(c);
977 break;
978
979 case X86_VENDOR_INTEL:
980 init_intel(c);
981 break;
982
983 case X86_VENDOR_UNKNOWN:
984 default:
985 display_cacheinfo(c);
986 break;
987 }
988
989 select_idle_routine(c);
990 detect_ht(c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991
992 /*
993 * On SMP, boot_cpu_data holds the common feature set between
994 * all CPUs; so make sure that we indicate which features are
995 * common between the CPUs. The first time this routine gets
996 * executed, c == &boot_cpu_data.
997 */
998 if (c != &boot_cpu_data) {
999 /* AND the already accumulated flags with these */
1000 for (i = 0 ; i < NCAPINTS ; i++)
1001 boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
1002 }
1003
1004#ifdef CONFIG_X86_MCE
1005 mcheck_init(c);
1006#endif
Shaohua Li3b520b22005-07-07 17:56:38 -07001007 if (c == &boot_cpu_data)
1008 mtrr_bp_init();
1009 else
1010 mtrr_ap_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011#ifdef CONFIG_NUMA
Andi Kleen3019e8e2005-07-28 21:15:28 -07001012 numa_add_cpu(smp_processor_id());
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013#endif
1014}
1015
1016
Ashok Raje6982c62005-06-25 14:54:58 -07001017void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018{
1019 if (c->x86_model_id[0])
1020 printk("%s", c->x86_model_id);
1021
1022 if (c->x86_mask || c->cpuid_level >= 0)
1023 printk(" stepping %02x\n", c->x86_mask);
1024 else
1025 printk("\n");
1026}
1027
1028/*
1029 * Get CPU information for use by the procfs.
1030 */
1031
1032static int show_cpuinfo(struct seq_file *m, void *v)
1033{
1034 struct cpuinfo_x86 *c = v;
1035
1036 /*
1037 * These flag bits must match the definitions in <asm/cpufeature.h>.
1038 * NULL means this bit is undefined or reserved; either way it doesn't
1039 * have meaning as far as Linux is concerned. Note that it's important
1040 * to realize there is a difference between this table and CPUID -- if
1041 * applications want to get the raw CPUID data, they should access
1042 * /dev/cpu/<cpu_nr>/cpuid instead.
1043 */
1044 static char *x86_cap_flags[] = {
1045 /* Intel-defined */
1046 "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
1047 "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
1048 "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
1049 "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL,
1050
1051 /* AMD-defined */
Zwane Mwaikambo3c3b73b2005-05-01 08:58:51 -07001052 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
1054 NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
Vojtech Pavlik7b0e8502006-06-26 13:58:26 +02001055 NULL, "fxsr_opt", NULL, "rdtscp", NULL, "lm", "3dnowext", "3dnow",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056
1057 /* Transmeta-defined */
1058 "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
1059 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1060 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1061 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1062
1063 /* Other (Linux-defined) */
Andi Kleen622dcaf2005-05-16 21:53:26 -07001064 "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
Andi Kleenc29601e2005-04-16 15:25:05 -07001065 "constant_tsc", NULL, NULL,
Gerd Hoffmannd167a512006-06-26 13:56:16 +02001066 "up", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1068 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1069
1070 /* Intel-defined (#2) */
Andi Kleen9d95dd82006-03-25 16:31:22 +01001071 "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
1073 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1074 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1075
H. Peter Anvin5b7abc62005-05-01 08:58:49 -07001076 /* VIA/Cyrix/Centaur-defined */
1077 NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
1078 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1079 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1080 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1081
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 /* AMD-defined (#2) */
Andi Kleen3f98bc42006-01-11 22:42:51 +01001083 "lahf_lm", "cmp_legacy", "svm", NULL, "cr8_legacy", NULL, NULL, NULL,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1085 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
H. Peter Anvin5b7abc62005-05-01 08:58:49 -07001086 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 };
1088 static char *x86_power_flags[] = {
1089 "ts", /* temperature sensor */
1090 "fid", /* frequency id control */
1091 "vid", /* voltage id control */
1092 "ttp", /* thermal trip */
1093 "tm",
Andi Kleen3f98bc42006-01-11 22:42:51 +01001094 "stc",
1095 NULL,
Andi Kleen39b3a792006-01-11 22:42:45 +01001096 /* nothing */ /* constant_tsc - moved to flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 };
1098
1099
1100#ifdef CONFIG_SMP
1101 if (!cpu_online(c-cpu_data))
1102 return 0;
1103#endif
1104
1105 seq_printf(m,"processor\t: %u\n"
1106 "vendor_id\t: %s\n"
1107 "cpu family\t: %d\n"
1108 "model\t\t: %d\n"
1109 "model name\t: %s\n",
1110 (unsigned)(c-cpu_data),
1111 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
1112 c->x86,
1113 (int)c->x86_model,
1114 c->x86_model_id[0] ? c->x86_model_id : "unknown");
1115
1116 if (c->x86_mask || c->cpuid_level >= 0)
1117 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
1118 else
1119 seq_printf(m, "stepping\t: unknown\n");
1120
1121 if (cpu_has(c,X86_FEATURE_TSC)) {
Venkatesh Pallipadi95235ca2005-12-02 10:43:20 -08001122 unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data));
1123 if (!freq)
1124 freq = cpu_khz;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
Venkatesh Pallipadi95235ca2005-12-02 10:43:20 -08001126 freq / 1000, (freq % 1000));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 }
1128
1129 /* Cache size */
1130 if (c->x86_cache_size >= 0)
1131 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
1132
1133#ifdef CONFIG_SMP
Siddha, Suresh B94605ef2005-11-05 17:25:54 +01001134 if (smp_num_siblings * c->x86_max_cores > 1) {
Andi Kleendb468682005-04-16 15:24:51 -07001135 int cpu = c - cpu_data;
Rohit Sethf3fa8eb2006-06-26 13:58:17 +02001136 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
Siddha, Suresh B94605ef2005-11-05 17:25:54 +01001137 seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[cpu]));
Rohit Sethf3fa8eb2006-06-26 13:58:17 +02001138 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
Siddha, Suresh B94605ef2005-11-05 17:25:54 +01001139 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
Andi Kleendb468682005-04-16 15:24:51 -07001140 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141#endif
1142
1143 seq_printf(m,
1144 "fpu\t\t: yes\n"
1145 "fpu_exception\t: yes\n"
1146 "cpuid level\t: %d\n"
1147 "wp\t\t: yes\n"
1148 "flags\t\t:",
1149 c->cpuid_level);
1150
1151 {
1152 int i;
1153 for ( i = 0 ; i < 32*NCAPINTS ; i++ )
Akinobu Mita3d1712c2006-03-24 03:15:11 -08001154 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 seq_printf(m, " %s", x86_cap_flags[i]);
1156 }
1157
1158 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
1159 c->loops_per_jiffy/(500000/HZ),
1160 (c->loops_per_jiffy/(5000/HZ)) % 100);
1161
1162 if (c->x86_tlbsize > 0)
1163 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
1164 seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
1165 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
1166
1167 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
1168 c->x86_phys_bits, c->x86_virt_bits);
1169
1170 seq_printf(m, "power management:");
1171 {
1172 unsigned i;
1173 for (i = 0; i < 32; i++)
1174 if (c->x86_power & (1 << i)) {
Andi Kleen3f98bc42006-01-11 22:42:51 +01001175 if (i < ARRAY_SIZE(x86_power_flags) &&
1176 x86_power_flags[i])
1177 seq_printf(m, "%s%s",
1178 x86_power_flags[i][0]?" ":"",
1179 x86_power_flags[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 else
1181 seq_printf(m, " [%d]", i);
1182 }
1183 }
Andi Kleen3dd9d512005-04-16 15:25:15 -07001184
Siddha, Suresh Bd31ddaa2005-04-16 15:25:20 -07001185 seq_printf(m, "\n\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 return 0;
1188}
1189
1190static void *c_start(struct seq_file *m, loff_t *pos)
1191{
1192 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
1193}
1194
1195static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1196{
1197 ++*pos;
1198 return c_start(m, pos);
1199}
1200
1201static void c_stop(struct seq_file *m, void *v)
1202{
1203}
1204
1205struct seq_operations cpuinfo_op = {
1206 .start =c_start,
1207 .next = c_next,
1208 .stop = c_stop,
1209 .show = show_cpuinfo,
1210};
Andi Kleene9928672006-01-11 22:43:33 +01001211
Piotr Kaczuba9c63f872006-06-26 13:59:38 +02001212#if defined(CONFIG_INPUT_PCSPKR) || defined(CONFIG_INPUT_PCSPKR_MODULE)
Mikael Pettersson160bd182006-05-01 12:16:18 -07001213#include <linux/platform_device.h>
1214static __init int add_pcspkr(void)
1215{
1216 struct platform_device *pd;
1217 int ret;
1218
1219 pd = platform_device_alloc("pcspkr", -1);
1220 if (!pd)
1221 return -ENOMEM;
1222
1223 ret = platform_device_add(pd);
1224 if (ret)
1225 platform_device_put(pd);
1226
1227 return ret;
1228}
1229device_initcall(add_pcspkr);
1230#endif