2 * linux/arch/x86-64/kernel/setup.c
4 * Copyright (C) 1995 Linus Torvalds
6 * Nov 2001 Dave Jones <davej@suse.de>
7 * Forked from i386 setup code.
11 * This file handles the architecture-dependent parts of initialization
14 #include <linux/errno.h>
15 #include <linux/sched.h>
16 #include <linux/kernel.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>
24 #include <linux/screen_info.h>
25 #include <linux/ioport.h>
26 #include <linux/delay.h>
27 #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>
35 #include <linux/crash_dump.h>
36 #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>
41 #include <linux/mmzone.h>
42 #include <linux/kexec.h>
43 #include <linux/cpufreq.h>
44 #include <linux/dmi.h>
45 #include <linux/dma-mapping.h>
46 #include <linux/ctype.h>
49 #include <asm/uaccess.h>
50 #include <asm/system.h>
55 #include <video/edid.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>
65 #include <asm/sections.h>
72 struct cpuinfo_x86 boot_cpu_data __read_mostly;
73 EXPORT_SYMBOL(boot_cpu_data);
75 unsigned long mmu_cr4_features;
77 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
80 unsigned long saved_video_mode;
86 char dmi_alloc_data[DMI_MAX_DATA];
91 struct screen_info screen_info;
92 EXPORT_SYMBOL(screen_info);
93 struct sys_desc_table_struct {
94 unsigned short length;
95 unsigned char table[0];
98 struct edid_info edid_info;
99 EXPORT_SYMBOL_GPL(edid_info);
101 extern int root_mountflags;
103 char command_line[COMMAND_LINE_SIZE];
105 struct 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 }
126 #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
128 struct resource data_resource = {
129 .name = "Kernel data",
132 .flags = IORESOURCE_RAM,
134 struct resource code_resource = {
135 .name = "Kernel code",
138 .flags = IORESOURCE_RAM,
141 #define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)
143 static struct resource system_rom_resource = {
144 .name = "System ROM",
147 .flags = IORESOURCE_ROM,
150 static struct resource extension_rom_resource = {
151 .name = "Extension ROM",
154 .flags = IORESOURCE_ROM,
157 static struct resource adapter_rom_resources[] = {
158 { .name = "Adapter ROM", .start = 0xc8000, .end = 0,
159 .flags = IORESOURCE_ROM },
160 { .name = "Adapter ROM", .start = 0, .end = 0,
161 .flags = IORESOURCE_ROM },
162 { .name = "Adapter ROM", .start = 0, .end = 0,
163 .flags = IORESOURCE_ROM },
164 { .name = "Adapter ROM", .start = 0, .end = 0,
165 .flags = IORESOURCE_ROM },
166 { .name = "Adapter ROM", .start = 0, .end = 0,
167 .flags = IORESOURCE_ROM },
168 { .name = "Adapter ROM", .start = 0, .end = 0,
169 .flags = IORESOURCE_ROM }
172 static struct resource video_rom_resource = {
176 .flags = IORESOURCE_ROM,
179 static struct resource video_ram_resource = {
180 .name = "Video RAM area",
183 .flags = IORESOURCE_RAM,
186 #define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
188 static int __init romchecksum(unsigned char *rom, unsigned long length)
190 unsigned char *p, sum = 0;
192 for (p = rom; p < rom + length; p++)
197 static void __init probe_roms(void)
199 unsigned long start, length, upper;
204 upper = adapter_rom_resources[0].start;
205 for (start = video_rom_resource.start; start < upper; start += 2048) {
206 rom = isa_bus_to_virt(start);
207 if (!romsignature(rom))
210 video_rom_resource.start = start;
212 /* 0 < length <= 0x7f * 512, historically */
213 length = rom[2] * 512;
215 /* if checksum okay, trust length byte */
216 if (length && romchecksum(rom, length))
217 video_rom_resource.end = start + length - 1;
219 request_resource(&iomem_resource, &video_rom_resource);
223 start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
228 request_resource(&iomem_resource, &system_rom_resource);
229 upper = system_rom_resource.start;
231 /* check for extension rom (ignore length byte!) */
232 rom = isa_bus_to_virt(extension_rom_resource.start);
233 if (romsignature(rom)) {
234 length = extension_rom_resource.end - extension_rom_resource.start + 1;
235 if (romchecksum(rom, length)) {
236 request_resource(&iomem_resource, &extension_rom_resource);
237 upper = extension_rom_resource.start;
241 /* check for adapter roms on 2k boundaries */
242 for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper;
244 rom = isa_bus_to_virt(start);
245 if (!romsignature(rom))
248 /* 0 < length <= 0x7f * 512, historically */
249 length = rom[2] * 512;
251 /* but accept any length that fits if checksum okay */
252 if (!length || start + length > upper || !romchecksum(rom, length))
255 adapter_rom_resources[i].start = start;
256 adapter_rom_resources[i].end = start + length - 1;
257 request_resource(&iomem_resource, &adapter_rom_resources[i]);
259 start = adapter_rom_resources[i++].end & ~2047UL;
263 #ifdef CONFIG_PROC_VMCORE
264 /* elfcorehdr= specifies the location of elf core header
265 * stored by the crashed kernel. This option will be passed
266 * by kexec loader to the capture kernel.
268 static int __init setup_elfcorehdr(char *arg)
273 elfcorehdr_addr = memparse(arg, &end);
274 return end > arg ? 0 : -EINVAL;
276 early_param("elfcorehdr", setup_elfcorehdr);
281 contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
283 unsigned long bootmap_size, bootmap;
285 bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
286 bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
288 panic("Cannot find bootmem map of size %ld\n",bootmap_size);
289 bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
290 e820_register_active_regions(0, start_pfn, end_pfn);
291 free_bootmem_with_active_regions(0, end_pfn);
292 reserve_bootmem(bootmap, bootmap_size);
296 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
298 #ifdef CONFIG_EDD_MODULE
302 * copy_edd() - Copy the BIOS EDD information
303 * from boot_params into a safe place.
306 static inline void copy_edd(void)
308 memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
309 memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
310 edd.mbr_signature_nr = EDD_MBR_SIG_NR;
311 edd.edd_info_nr = EDD_NR;
314 static inline void copy_edd(void)
319 #define EBDA_ADDR_POINTER 0x40E
321 unsigned __initdata ebda_addr;
322 unsigned __initdata ebda_size;
324 static void discover_ebda(void)
327 * there is a real-mode segmented pointer pointing to the
328 * 4K EBDA area at 0x40E
330 ebda_addr = *(unsigned short *)EBDA_ADDR_POINTER;
333 ebda_size = *(unsigned short *)(unsigned long)ebda_addr;
335 /* Round EBDA up to pages */
339 ebda_size = round_up(ebda_size + (ebda_addr & ~PAGE_MASK), PAGE_SIZE);
340 if (ebda_size > 64*1024)
344 void __init setup_arch(char **cmdline_p)
346 printk(KERN_INFO "Command line: %s\n", saved_command_line);
348 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
349 screen_info = SCREEN_INFO;
350 edid_info = EDID_INFO;
351 saved_video_mode = SAVED_VIDEO_MODE;
352 bootloader_type = LOADER_TYPE;
354 #ifdef CONFIG_BLK_DEV_RAM
355 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
356 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
357 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
359 setup_memory_region();
362 if (!MOUNT_ROOT_RDONLY)
363 root_mountflags &= ~MS_RDONLY;
364 init_mm.start_code = (unsigned long) &_text;
365 init_mm.end_code = (unsigned long) &_etext;
366 init_mm.end_data = (unsigned long) &_edata;
367 init_mm.brk = (unsigned long) &_end;
369 code_resource.start = virt_to_phys(&_text);
370 code_resource.end = virt_to_phys(&_etext)-1;
371 data_resource.start = virt_to_phys(&_etext);
372 data_resource.end = virt_to_phys(&_edata)-1;
374 early_identify_cpu(&boot_cpu_data);
376 strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
377 *cmdline_p = command_line;
381 finish_e820_parsing();
383 e820_register_active_regions(0, 0, -1UL);
385 * partially used pages are not usable - thus
386 * we are rounding upwards:
388 end_pfn = e820_end_of_ram();
389 num_physpages = end_pfn;
395 init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
403 * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
404 * Call this early for SRAT node setup.
406 acpi_boot_table_init();
409 /* How many end-of-memory variables you have, grandma! */
410 max_low_pfn = end_pfn;
412 high_memory = (void *)__va(end_pfn * PAGE_SIZE - 1) + 1;
414 /* Remove active ranges so rediscovery with NUMA-awareness happens */
415 remove_all_active_ranges();
417 #ifdef CONFIG_ACPI_NUMA
419 * Parse SRAT to discover nodes.
425 numa_initmem_init(0, end_pfn);
427 contig_initmem_init(0, end_pfn);
430 /* Reserve direct mapping */
431 reserve_bootmem_generic(table_start << PAGE_SHIFT,
432 (table_end - table_start) << PAGE_SHIFT);
435 reserve_bootmem_generic(__pa_symbol(&_text),
436 __pa_symbol(&_end) - __pa_symbol(&_text));
439 * reserve physical page 0 - it's a special BIOS page on many boxes,
440 * enabling clean reboots, SMP operation, laptop functions.
442 reserve_bootmem_generic(0, PAGE_SIZE);
444 /* reserve ebda region */
446 reserve_bootmem_generic(ebda_addr, ebda_size);
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)
454 reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);
456 /* Reserve SMP trampoline */
457 reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
460 #ifdef CONFIG_ACPI_SLEEP
462 * Reserve low memory region for sleep support.
464 acpi_reserve_bootmem();
467 * Find and reserve possible boot-time SMP configuration:
470 #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 = INITRD_START + PAGE_OFFSET;
475 initrd_end = initrd_start+INITRD_SIZE;
478 printk(KERN_ERR "initrd extends beyond end of memory "
479 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
480 (unsigned long)(INITRD_START + INITRD_SIZE),
481 (unsigned long)(end_pfn << PAGE_SHIFT));
487 if (crashk_res.start != crashk_res.end) {
488 reserve_bootmem_generic(crashk_res.start,
489 crashk_res.end - crashk_res.start + 1);
500 * set this early, so we dont allocate cpu0
501 * if MADT list doesnt list BSP first
502 * mpparse.c/MP_processor_info() allocates logical cpu numbers.
504 cpu_set(0, cpu_present_map);
507 * Read APIC and some other early information from ACPI tables.
515 * get boot-time SMP configuration:
517 if (smp_found_config)
519 init_apic_mappings();
522 * Request address space for all standard RAM and ROM resources
523 * and also for regions reported as reserved by the e820.
526 e820_reserve_resources();
527 e820_mark_nosave_regions();
529 request_resource(&iomem_resource, &video_ram_resource);
533 /* request I/O space for devices used on all i[345]86 PCs */
534 for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
535 request_resource(&ioport_resource, &standard_io_resources[i]);
541 #if defined(CONFIG_VGA_CONSOLE)
542 conswitchp = &vga_con;
543 #elif defined(CONFIG_DUMMY_CONSOLE)
544 conswitchp = &dummy_con;
549 static int __cpuinit get_model_name(struct cpuinfo_x86 *c)
553 if (c->extended_cpuid_level < 0x80000004)
556 v = (unsigned int *) c->x86_model_id;
557 cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
558 cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
559 cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
560 c->x86_model_id[48] = 0;
565 static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
567 unsigned int n, dummy, eax, ebx, ecx, edx;
569 n = c->extended_cpuid_level;
571 if (n >= 0x80000005) {
572 cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
573 printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
574 edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
575 c->x86_cache_size=(ecx>>24)+(edx>>24);
576 /* On K8 L1 TLB is inclusive, so don't count it */
580 if (n >= 0x80000006) {
581 cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
582 ecx = cpuid_ecx(0x80000006);
583 c->x86_cache_size = ecx >> 16;
584 c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
586 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
587 c->x86_cache_size, ecx & 0xFF);
591 cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power);
592 if (n >= 0x80000008) {
593 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
594 c->x86_virt_bits = (eax >> 8) & 0xff;
595 c->x86_phys_bits = eax & 0xff;
600 static int nearby_node(int apicid)
603 for (i = apicid - 1; i >= 0; i--) {
604 int node = apicid_to_node[i];
605 if (node != NUMA_NO_NODE && node_online(node))
608 for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) {
609 int node = apicid_to_node[i];
610 if (node != NUMA_NO_NODE && node_online(node))
613 return first_node(node_online_map); /* Shouldn't happen */
618 * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
619 * Assumes number of cores is a power of two.
621 static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
626 int cpu = smp_processor_id();
628 unsigned apicid = hard_smp_processor_id();
630 unsigned ecx = cpuid_ecx(0x80000008);
632 c->x86_max_cores = (ecx & 0xff) + 1;
634 /* CPU telling us the core id bits shift? */
635 bits = (ecx >> 12) & 0xF;
637 /* Otherwise recompute */
639 while ((1 << bits) < c->x86_max_cores)
643 /* Low order bits define the core id (index of core in socket) */
644 c->cpu_core_id = c->phys_proc_id & ((1 << bits)-1);
645 /* Convert the APIC ID into the socket ID */
646 c->phys_proc_id = phys_pkg_id(bits);
649 node = c->phys_proc_id;
650 if (apicid_to_node[apicid] != NUMA_NO_NODE)
651 node = apicid_to_node[apicid];
652 if (!node_online(node)) {
653 /* Two possibilities here:
654 - The CPU is missing memory and no node was created.
655 In that case try picking one from a nearby CPU
656 - The APIC IDs differ from the HyperTransport node IDs
657 which the K8 northbridge parsing fills in.
658 Assume they are all increased by a constant offset,
659 but in the same order as the HT nodeids.
660 If that doesn't result in a usable node fall back to the
661 path for the previous case. */
662 int ht_nodeid = apicid - (cpu_data[0].phys_proc_id << bits);
663 if (ht_nodeid >= 0 &&
664 apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
665 node = apicid_to_node[ht_nodeid];
666 /* Pick a nearby node */
667 if (!node_online(node))
668 node = nearby_node(apicid);
670 numa_set_node(cpu, node);
672 printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
677 static void __cpuinit init_amd(struct cpuinfo_x86 *c)
685 * Disable TLB flush filter by setting HWCR.FFDIS on K8
686 * bit 6 of msr C001_0015
688 * Errata 63 for SH-B3 steppings
689 * Errata 122 for all steppings (F+ have it disabled by default)
692 rdmsrl(MSR_K8_HWCR, value);
694 wrmsrl(MSR_K8_HWCR, value);
698 /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
699 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
700 clear_bit(0*32+31, &c->x86_capability);
702 /* On C+ stepping K8 rep microcode works well for copy/memset */
703 level = cpuid_eax(1);
704 if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58))
705 set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
707 /* Enable workaround for FXSAVE leak */
709 set_bit(X86_FEATURE_FXSAVE_LEAK, &c->x86_capability);
711 level = get_model_name(c);
715 /* Should distinguish Models here, but this is only
716 a fallback anyways. */
717 strcpy(c->x86_model_id, "Hammer");
721 display_cacheinfo(c);
723 /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
724 if (c->x86_power & (1<<8))
725 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
727 /* Multi core CPU? */
728 if (c->extended_cpuid_level >= 0x80000008)
731 /* Fix cpuid4 emulation for more */
732 num_cache_leaves = 3;
734 /* RDTSC can be speculated around */
735 clear_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
738 static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
741 u32 eax, ebx, ecx, edx;
742 int index_msb, core_bits;
744 cpuid(1, &eax, &ebx, &ecx, &edx);
747 if (!cpu_has(c, X86_FEATURE_HT))
749 if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
752 smp_num_siblings = (ebx & 0xff0000) >> 16;
754 if (smp_num_siblings == 1) {
755 printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
756 } else if (smp_num_siblings > 1 ) {
758 if (smp_num_siblings > NR_CPUS) {
759 printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
760 smp_num_siblings = 1;
764 index_msb = get_count_order(smp_num_siblings);
765 c->phys_proc_id = phys_pkg_id(index_msb);
767 smp_num_siblings = smp_num_siblings / c->x86_max_cores;
769 index_msb = get_count_order(smp_num_siblings) ;
771 core_bits = get_count_order(c->x86_max_cores);
773 c->cpu_core_id = phys_pkg_id(index_msb) &
774 ((1 << core_bits) - 1);
777 if ((c->x86_max_cores * smp_num_siblings) > 1) {
778 printk(KERN_INFO "CPU: Physical Processor ID: %d\n", c->phys_proc_id);
779 printk(KERN_INFO "CPU: Processor Core ID: %d\n", c->cpu_core_id);
786 * find out the number of processor cores on the die
788 static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
792 if (c->cpuid_level < 4)
795 cpuid_count(4, 0, &eax, &t, &t, &t);
798 return ((eax >> 26) + 1);
803 static void srat_detect_node(void)
807 int cpu = smp_processor_id();
808 int apicid = hard_smp_processor_id();
810 /* Don't do the funky fallback heuristics the AMD version employs
812 node = apicid_to_node[apicid];
813 if (node == NUMA_NO_NODE)
814 node = first_node(node_online_map);
815 numa_set_node(cpu, node);
817 printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
821 static void __cpuinit init_intel(struct cpuinfo_x86 *c)
826 init_intel_cacheinfo(c);
827 if (c->cpuid_level > 9 ) {
828 unsigned eax = cpuid_eax(10);
829 /* Check for version and the number of counters */
830 if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
831 set_bit(X86_FEATURE_ARCH_PERFMON, &c->x86_capability);
836 rdmsr(MSR_IA32_MISC_ENABLE, l1, l2);
838 set_bit(X86_FEATURE_BTS, c->x86_capability);
840 set_bit(X86_FEATURE_PEBS, c->x86_capability);
843 n = c->extended_cpuid_level;
844 if (n >= 0x80000008) {
845 unsigned eax = cpuid_eax(0x80000008);
846 c->x86_virt_bits = (eax >> 8) & 0xff;
847 c->x86_phys_bits = eax & 0xff;
848 /* CPUID workaround for Intel 0F34 CPU */
849 if (c->x86_vendor == X86_VENDOR_INTEL &&
850 c->x86 == 0xF && c->x86_model == 0x3 &&
852 c->x86_phys_bits = 36;
856 c->x86_cache_alignment = c->x86_clflush_size * 2;
857 if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
858 (c->x86 == 0x6 && c->x86_model >= 0x0e))
859 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
861 set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
863 set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
865 clear_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
866 c->x86_max_cores = intel_num_cpu_cores(c);
871 static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
873 char *v = c->x86_vendor_id;
875 if (!strcmp(v, "AuthenticAMD"))
876 c->x86_vendor = X86_VENDOR_AMD;
877 else if (!strcmp(v, "GenuineIntel"))
878 c->x86_vendor = X86_VENDOR_INTEL;
880 c->x86_vendor = X86_VENDOR_UNKNOWN;
883 struct cpu_model_info {
886 char *model_names[16];
889 /* Do some early cpuid on the boot CPU to get some parameter that are
890 needed before check_bugs. Everything advanced is in identify_cpu
892 void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
896 c->loops_per_jiffy = loops_per_jiffy;
897 c->x86_cache_size = -1;
898 c->x86_vendor = X86_VENDOR_UNKNOWN;
899 c->x86_model = c->x86_mask = 0; /* So far unknown... */
900 c->x86_vendor_id[0] = '\0'; /* Unset */
901 c->x86_model_id[0] = '\0'; /* Unset */
902 c->x86_clflush_size = 64;
903 c->x86_cache_alignment = c->x86_clflush_size;
904 c->x86_max_cores = 1;
905 c->extended_cpuid_level = 0;
906 memset(&c->x86_capability, 0, sizeof c->x86_capability);
908 /* Get vendor name */
909 cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
910 (unsigned int *)&c->x86_vendor_id[0],
911 (unsigned int *)&c->x86_vendor_id[8],
912 (unsigned int *)&c->x86_vendor_id[4]);
916 /* Initialize the standard set of capabilities */
917 /* Note that the vendor-specific code below might override */
919 /* Intel-defined flags: level 0x00000001 */
920 if (c->cpuid_level >= 0x00000001) {
922 cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
923 &c->x86_capability[0]);
924 c->x86 = (tfms >> 8) & 0xf;
925 c->x86_model = (tfms >> 4) & 0xf;
926 c->x86_mask = tfms & 0xf;
928 c->x86 += (tfms >> 20) & 0xff;
930 c->x86_model += ((tfms >> 16) & 0xF) << 4;
931 if (c->x86_capability[0] & (1<<19))
932 c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
934 /* Have CPUID level 0 only - unheard of */
939 c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
944 * This does the hard work of actually picking apart the CPU stuff...
946 void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
951 early_identify_cpu(c);
953 /* AMD-defined flags: level 0x80000001 */
954 xlvl = cpuid_eax(0x80000000);
955 c->extended_cpuid_level = xlvl;
956 if ((xlvl & 0xffff0000) == 0x80000000) {
957 if (xlvl >= 0x80000001) {
958 c->x86_capability[1] = cpuid_edx(0x80000001);
959 c->x86_capability[6] = cpuid_ecx(0x80000001);
961 if (xlvl >= 0x80000004)
962 get_model_name(c); /* Default name */
965 /* Transmeta-defined flags: level 0x80860001 */
966 xlvl = cpuid_eax(0x80860000);
967 if ((xlvl & 0xffff0000) == 0x80860000) {
968 /* Don't set x86_cpuid_level here for now to not confuse. */
969 if (xlvl >= 0x80860001)
970 c->x86_capability[2] = cpuid_edx(0x80860001);
973 c->apicid = phys_pkg_id(0);
976 * Vendor-specific initialization. In this section we
977 * canonicalize the feature flags, meaning if there are
978 * features a certain CPU supports which CPUID doesn't
979 * tell us, CPUID claiming incorrect flags, or other bugs,
980 * we handle them here.
982 * At the end of this section, c->x86_capability better
983 * indicate the features this CPU genuinely supports!
985 switch (c->x86_vendor) {
990 case X86_VENDOR_INTEL:
994 case X86_VENDOR_UNKNOWN:
996 display_cacheinfo(c);
1000 select_idle_routine(c);
1004 * On SMP, boot_cpu_data holds the common feature set between
1005 * all CPUs; so make sure that we indicate which features are
1006 * common between the CPUs. The first time this routine gets
1007 * executed, c == &boot_cpu_data.
1009 if (c != &boot_cpu_data) {
1010 /* AND the already accumulated flags with these */
1011 for (i = 0 ; i < NCAPINTS ; i++)
1012 boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
1015 #ifdef CONFIG_X86_MCE
1018 if (c == &boot_cpu_data)
1023 numa_add_cpu(smp_processor_id());
1028 void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
1030 if (c->x86_model_id[0])
1031 printk("%s", c->x86_model_id);
1033 if (c->x86_mask || c->cpuid_level >= 0)
1034 printk(" stepping %02x\n", c->x86_mask);
1040 * Get CPU information for use by the procfs.
1043 static int show_cpuinfo(struct seq_file *m, void *v)
1045 struct cpuinfo_x86 *c = v;
1048 * These flag bits must match the definitions in <asm/cpufeature.h>.
1049 * NULL means this bit is undefined or reserved; either way it doesn't
1050 * have meaning as far as Linux is concerned. Note that it's important
1051 * to realize there is a difference between this table and CPUID -- if
1052 * applications want to get the raw CPUID data, they should access
1053 * /dev/cpu/<cpu_nr>/cpuid instead.
1055 static char *x86_cap_flags[] = {
1057 "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
1058 "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
1059 "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
1060 "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL,
1063 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1064 NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
1065 NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
1066 NULL, "fxsr_opt", NULL, "rdtscp", NULL, "lm", "3dnowext", "3dnow",
1068 /* Transmeta-defined */
1069 "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
1070 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1071 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1072 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1074 /* Other (Linux-defined) */
1075 "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
1076 "constant_tsc", NULL, NULL,
1077 "up", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1078 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1079 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1081 /* Intel-defined (#2) */
1082 "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
1083 "tm2", "ssse3", "cid", NULL, NULL, "cx16", "xtpr", NULL,
1084 NULL, NULL, "dca", NULL, NULL, NULL, NULL, NULL,
1085 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1087 /* VIA/Cyrix/Centaur-defined */
1088 NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
1089 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1090 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1091 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1093 /* AMD-defined (#2) */
1094 "lahf_lm", "cmp_legacy", "svm", NULL, "cr8_legacy", NULL, NULL, NULL,
1095 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1096 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1097 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1099 static char *x86_power_flags[] = {
1100 "ts", /* temperature sensor */
1101 "fid", /* frequency id control */
1102 "vid", /* voltage id control */
1103 "ttp", /* thermal trip */
1107 /* nothing */ /* constant_tsc - moved to flags */
1112 if (!cpu_online(c-cpu_data))
1116 seq_printf(m,"processor\t: %u\n"
1118 "cpu family\t: %d\n"
1120 "model name\t: %s\n",
1121 (unsigned)(c-cpu_data),
1122 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
1125 c->x86_model_id[0] ? c->x86_model_id : "unknown");
1127 if (c->x86_mask || c->cpuid_level >= 0)
1128 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
1130 seq_printf(m, "stepping\t: unknown\n");
1132 if (cpu_has(c,X86_FEATURE_TSC)) {
1133 unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data));
1136 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
1137 freq / 1000, (freq % 1000));
1141 if (c->x86_cache_size >= 0)
1142 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
1145 if (smp_num_siblings * c->x86_max_cores > 1) {
1146 int cpu = c - cpu_data;
1147 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
1148 seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[cpu]));
1149 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
1150 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
1156 "fpu_exception\t: yes\n"
1157 "cpuid level\t: %d\n"
1164 for ( i = 0 ; i < 32*NCAPINTS ; i++ )
1165 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
1166 seq_printf(m, " %s", x86_cap_flags[i]);
1169 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
1170 c->loops_per_jiffy/(500000/HZ),
1171 (c->loops_per_jiffy/(5000/HZ)) % 100);
1173 if (c->x86_tlbsize > 0)
1174 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
1175 seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
1176 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
1178 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
1179 c->x86_phys_bits, c->x86_virt_bits);
1181 seq_printf(m, "power management:");
1184 for (i = 0; i < 32; i++)
1185 if (c->x86_power & (1 << i)) {
1186 if (i < ARRAY_SIZE(x86_power_flags) &&
1188 seq_printf(m, "%s%s",
1189 x86_power_flags[i][0]?" ":"",
1190 x86_power_flags[i]);
1192 seq_printf(m, " [%d]", i);
1196 seq_printf(m, "\n\n");
1201 static void *c_start(struct seq_file *m, loff_t *pos)
1203 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
1206 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1209 return c_start(m, pos);
1212 static void c_stop(struct seq_file *m, void *v)
1216 struct seq_operations cpuinfo_op = {
1220 .show = show_cpuinfo,
1223 #if defined(CONFIG_INPUT_PCSPKR) || defined(CONFIG_INPUT_PCSPKR_MODULE)
1224 #include <linux/platform_device.h>
1225 static __init int add_pcspkr(void)
1227 struct platform_device *pd;
1230 pd = platform_device_alloc("pcspkr", -1);
1234 ret = platform_device_add(pd);
1236 platform_device_put(pd);
1240 device_initcall(add_pcspkr);