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 int acpi_numa __initdata;
79 /* Boot loader ID as an integer, for the benefit of proc_dointvec */
82 unsigned long saved_video_mode;
88 char dmi_alloc_data[DMI_MAX_DATA];
93 struct screen_info screen_info;
94 EXPORT_SYMBOL(screen_info);
95 struct sys_desc_table_struct {
96 unsigned short length;
97 unsigned char table[0];
100 struct edid_info edid_info;
101 EXPORT_SYMBOL_GPL(edid_info);
104 extern int root_mountflags;
106 char command_line[COMMAND_LINE_SIZE];
108 struct resource standard_io_resources[] = {
109 { .name = "dma1", .start = 0x00, .end = 0x1f,
110 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
111 { .name = "pic1", .start = 0x20, .end = 0x21,
112 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
113 { .name = "timer0", .start = 0x40, .end = 0x43,
114 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
115 { .name = "timer1", .start = 0x50, .end = 0x53,
116 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
117 { .name = "keyboard", .start = 0x60, .end = 0x6f,
118 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
119 { .name = "dma page reg", .start = 0x80, .end = 0x8f,
120 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
121 { .name = "pic2", .start = 0xa0, .end = 0xa1,
122 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
123 { .name = "dma2", .start = 0xc0, .end = 0xdf,
124 .flags = IORESOURCE_BUSY | IORESOURCE_IO },
125 { .name = "fpu", .start = 0xf0, .end = 0xff,
126 .flags = IORESOURCE_BUSY | IORESOURCE_IO }
129 #define STANDARD_IO_RESOURCES \
130 (sizeof standard_io_resources / sizeof standard_io_resources[0])
132 #define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM)
134 struct resource data_resource = {
135 .name = "Kernel data",
138 .flags = IORESOURCE_RAM,
140 struct resource code_resource = {
141 .name = "Kernel code",
144 .flags = IORESOURCE_RAM,
147 #define IORESOURCE_ROM (IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM)
149 static struct resource system_rom_resource = {
150 .name = "System ROM",
153 .flags = IORESOURCE_ROM,
156 static struct resource extension_rom_resource = {
157 .name = "Extension ROM",
160 .flags = IORESOURCE_ROM,
163 static struct resource adapter_rom_resources[] = {
164 { .name = "Adapter ROM", .start = 0xc8000, .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 },
170 { .name = "Adapter ROM", .start = 0, .end = 0,
171 .flags = IORESOURCE_ROM },
172 { .name = "Adapter ROM", .start = 0, .end = 0,
173 .flags = IORESOURCE_ROM },
174 { .name = "Adapter ROM", .start = 0, .end = 0,
175 .flags = IORESOURCE_ROM }
178 #define ADAPTER_ROM_RESOURCES \
179 (sizeof adapter_rom_resources / sizeof adapter_rom_resources[0])
181 static struct resource video_rom_resource = {
185 .flags = IORESOURCE_ROM,
188 static struct resource video_ram_resource = {
189 .name = "Video RAM area",
192 .flags = IORESOURCE_RAM,
195 #define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
197 static int __init romchecksum(unsigned char *rom, unsigned long length)
199 unsigned char *p, sum = 0;
201 for (p = rom; p < rom + length; p++)
206 static void __init probe_roms(void)
208 unsigned long start, length, upper;
213 upper = adapter_rom_resources[0].start;
214 for (start = video_rom_resource.start; start < upper; start += 2048) {
215 rom = isa_bus_to_virt(start);
216 if (!romsignature(rom))
219 video_rom_resource.start = start;
221 /* 0 < length <= 0x7f * 512, historically */
222 length = rom[2] * 512;
224 /* if checksum okay, trust length byte */
225 if (length && romchecksum(rom, length))
226 video_rom_resource.end = start + length - 1;
228 request_resource(&iomem_resource, &video_rom_resource);
232 start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
237 request_resource(&iomem_resource, &system_rom_resource);
238 upper = system_rom_resource.start;
240 /* check for extension rom (ignore length byte!) */
241 rom = isa_bus_to_virt(extension_rom_resource.start);
242 if (romsignature(rom)) {
243 length = extension_rom_resource.end - extension_rom_resource.start + 1;
244 if (romchecksum(rom, length)) {
245 request_resource(&iomem_resource, &extension_rom_resource);
246 upper = extension_rom_resource.start;
250 /* check for adapter roms on 2k boundaries */
251 for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) {
252 rom = isa_bus_to_virt(start);
253 if (!romsignature(rom))
256 /* 0 < length <= 0x7f * 512, historically */
257 length = rom[2] * 512;
259 /* but accept any length that fits if checksum okay */
260 if (!length || start + length > upper || !romchecksum(rom, length))
263 adapter_rom_resources[i].start = start;
264 adapter_rom_resources[i].end = start + length - 1;
265 request_resource(&iomem_resource, &adapter_rom_resources[i]);
267 start = adapter_rom_resources[i++].end & ~2047UL;
271 #ifdef CONFIG_PROC_VMCORE
272 /* elfcorehdr= specifies the location of elf core header
273 * stored by the crashed kernel. This option will be passed
274 * by kexec loader to the capture kernel.
276 static int __init setup_elfcorehdr(char *arg)
281 elfcorehdr_addr = memparse(arg, &end);
282 return end > arg ? 0 : -EINVAL;
284 early_param("elfcorehdr", setup_elfcorehdr);
289 contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
291 unsigned long bootmap_size, bootmap;
293 bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
294 bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size);
296 panic("Cannot find bootmem map of size %ld\n",bootmap_size);
297 bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
298 e820_bootmem_free(NODE_DATA(0), 0, end_pfn << PAGE_SHIFT);
299 reserve_bootmem(bootmap, bootmap_size);
303 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
305 #ifdef CONFIG_EDD_MODULE
309 * copy_edd() - Copy the BIOS EDD information
310 * from boot_params into a safe place.
313 static inline void copy_edd(void)
315 memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature));
316 memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info));
317 edd.mbr_signature_nr = EDD_MBR_SIG_NR;
318 edd.edd_info_nr = EDD_NR;
321 static inline void copy_edd(void)
326 #define EBDA_ADDR_POINTER 0x40E
328 unsigned __initdata ebda_addr;
329 unsigned __initdata ebda_size;
331 static void discover_ebda(void)
334 * there is a real-mode segmented pointer pointing to the
335 * 4K EBDA area at 0x40E
337 ebda_addr = *(unsigned short *)EBDA_ADDR_POINTER;
340 ebda_size = *(unsigned short *)(unsigned long)ebda_addr;
342 /* Round EBDA up to pages */
346 ebda_size = round_up(ebda_size + (ebda_addr & ~PAGE_MASK), PAGE_SIZE);
347 if (ebda_size > 64*1024)
351 void __init setup_arch(char **cmdline_p)
353 printk(KERN_INFO "Command line: %s\n", saved_command_line);
355 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
356 screen_info = SCREEN_INFO;
357 edid_info = EDID_INFO;
358 saved_video_mode = SAVED_VIDEO_MODE;
359 bootloader_type = LOADER_TYPE;
361 #ifdef CONFIG_BLK_DEV_RAM
362 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
363 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
364 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
366 setup_memory_region();
369 if (!MOUNT_ROOT_RDONLY)
370 root_mountflags &= ~MS_RDONLY;
371 init_mm.start_code = (unsigned long) &_text;
372 init_mm.end_code = (unsigned long) &_etext;
373 init_mm.end_data = (unsigned long) &_edata;
374 init_mm.brk = (unsigned long) &_end;
376 code_resource.start = virt_to_phys(&_text);
377 code_resource.end = virt_to_phys(&_etext)-1;
378 data_resource.start = virt_to_phys(&_etext);
379 data_resource.end = virt_to_phys(&_edata)-1;
381 early_identify_cpu(&boot_cpu_data);
383 strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
384 *cmdline_p = command_line;
388 finish_e820_parsing();
391 * partially used pages are not usable - thus
392 * we are rounding upwards:
394 end_pfn = e820_end_of_ram();
395 num_physpages = end_pfn;
401 init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT));
409 * Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
410 * Call this early for SRAT node setup.
412 acpi_boot_table_init();
415 /* How many end-of-memory variables you have, grandma! */
416 max_low_pfn = end_pfn;
418 high_memory = (void *)__va(end_pfn * PAGE_SIZE - 1) + 1;
420 #ifdef CONFIG_ACPI_NUMA
422 * Parse SRAT to discover nodes.
428 numa_initmem_init(0, end_pfn);
430 contig_initmem_init(0, end_pfn);
433 /* Reserve direct mapping */
434 reserve_bootmem_generic(table_start << PAGE_SHIFT,
435 (table_end - table_start) << PAGE_SHIFT);
438 reserve_bootmem_generic(__pa_symbol(&_text),
439 __pa_symbol(&_end) - __pa_symbol(&_text));
442 * reserve physical page 0 - it's a special BIOS page on many boxes,
443 * enabling clean reboots, SMP operation, laptop functions.
445 reserve_bootmem_generic(0, PAGE_SIZE);
447 /* reserve ebda region */
449 reserve_bootmem_generic(ebda_addr, ebda_size);
453 * But first pinch a few for the stack/trampoline stuff
454 * FIXME: Don't need the extra page at 4K, but need to fix
455 * trampoline before removing it. (see the GDT stuff)
457 reserve_bootmem_generic(PAGE_SIZE, PAGE_SIZE);
459 /* Reserve SMP trampoline */
460 reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, PAGE_SIZE);
463 #ifdef CONFIG_ACPI_SLEEP
465 * Reserve low memory region for sleep support.
467 acpi_reserve_bootmem();
470 * Find and reserve possible boot-time SMP configuration:
473 #ifdef CONFIG_BLK_DEV_INITRD
474 if (LOADER_TYPE && INITRD_START) {
475 if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) {
476 reserve_bootmem_generic(INITRD_START, INITRD_SIZE);
478 INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
479 initrd_end = initrd_start+INITRD_SIZE;
482 printk(KERN_ERR "initrd extends beyond end of memory "
483 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
484 (unsigned long)(INITRD_START + INITRD_SIZE),
485 (unsigned long)(end_pfn << PAGE_SHIFT));
491 if (crashk_res.start != crashk_res.end) {
492 reserve_bootmem_generic(crashk_res.start,
493 crashk_res.end - crashk_res.start + 1);
502 * set this early, so we dont allocate cpu0
503 * if MADT list doesnt list BSP first
504 * mpparse.c/MP_processor_info() allocates logical cpu numbers.
506 cpu_set(0, cpu_present_map);
509 * Read APIC and some other early information from ACPI tables.
517 * get boot-time SMP configuration:
519 if (smp_found_config)
521 init_apic_mappings();
524 * Request address space for all standard RAM and ROM resources
525 * and also for regions reported as reserved by the e820.
528 e820_reserve_resources();
530 request_resource(&iomem_resource, &video_ram_resource);
534 /* request I/O space for devices used on all i[345]86 PCs */
535 for (i = 0; i < STANDARD_IO_RESOURCES; i++)
536 request_resource(&ioport_resource, &standard_io_resources[i]);
542 #if defined(CONFIG_VGA_CONSOLE)
543 conswitchp = &vga_con;
544 #elif defined(CONFIG_DUMMY_CONSOLE)
545 conswitchp = &dummy_con;
550 static int __cpuinit get_model_name(struct cpuinfo_x86 *c)
554 if (c->extended_cpuid_level < 0x80000004)
557 v = (unsigned int *) c->x86_model_id;
558 cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
559 cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
560 cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
561 c->x86_model_id[48] = 0;
566 static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
568 unsigned int n, dummy, eax, ebx, ecx, edx;
570 n = c->extended_cpuid_level;
572 if (n >= 0x80000005) {
573 cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
574 printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n",
575 edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
576 c->x86_cache_size=(ecx>>24)+(edx>>24);
577 /* On K8 L1 TLB is inclusive, so don't count it */
581 if (n >= 0x80000006) {
582 cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
583 ecx = cpuid_ecx(0x80000006);
584 c->x86_cache_size = ecx >> 16;
585 c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
587 printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
588 c->x86_cache_size, ecx & 0xFF);
592 cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power);
593 if (n >= 0x80000008) {
594 cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
595 c->x86_virt_bits = (eax >> 8) & 0xff;
596 c->x86_phys_bits = eax & 0xff;
601 static int nearby_node(int apicid)
604 for (i = apicid - 1; i >= 0; i--) {
605 int node = apicid_to_node[i];
606 if (node != NUMA_NO_NODE && node_online(node))
609 for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) {
610 int node = apicid_to_node[i];
611 if (node != NUMA_NO_NODE && node_online(node))
614 return first_node(node_online_map); /* Shouldn't happen */
619 * On a AMD dual core setup the lower bits of the APIC id distingush the cores.
620 * Assumes number of cores is a power of two.
622 static void __init amd_detect_cmp(struct cpuinfo_x86 *c)
627 int cpu = smp_processor_id();
629 unsigned apicid = hard_smp_processor_id();
631 unsigned ecx = cpuid_ecx(0x80000008);
633 c->x86_max_cores = (ecx & 0xff) + 1;
635 /* CPU telling us the core id bits shift? */
636 bits = (ecx >> 12) & 0xF;
638 /* Otherwise recompute */
640 while ((1 << bits) < c->x86_max_cores)
644 /* Low order bits define the core id (index of core in socket) */
645 c->cpu_core_id = c->phys_proc_id & ((1 << bits)-1);
646 /* Convert the APIC ID into the socket ID */
647 c->phys_proc_id = phys_pkg_id(bits);
650 node = c->phys_proc_id;
651 if (apicid_to_node[apicid] != NUMA_NO_NODE)
652 node = apicid_to_node[apicid];
653 if (!node_online(node)) {
654 /* Two possibilities here:
655 - The CPU is missing memory and no node was created.
656 In that case try picking one from a nearby CPU
657 - The APIC IDs differ from the HyperTransport node IDs
658 which the K8 northbridge parsing fills in.
659 Assume they are all increased by a constant offset,
660 but in the same order as the HT nodeids.
661 If that doesn't result in a usable node fall back to the
662 path for the previous case. */
663 int ht_nodeid = apicid - (cpu_data[0].phys_proc_id << bits);
664 if (ht_nodeid >= 0 &&
665 apicid_to_node[ht_nodeid] != NUMA_NO_NODE)
666 node = apicid_to_node[ht_nodeid];
667 /* Pick a nearby node */
668 if (!node_online(node))
669 node = nearby_node(apicid);
671 numa_set_node(cpu, node);
673 printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
678 static void __init init_amd(struct cpuinfo_x86 *c)
686 * Disable TLB flush filter by setting HWCR.FFDIS on K8
687 * bit 6 of msr C001_0015
689 * Errata 63 for SH-B3 steppings
690 * Errata 122 for all steppings (F+ have it disabled by default)
693 rdmsrl(MSR_K8_HWCR, value);
695 wrmsrl(MSR_K8_HWCR, value);
699 /* Bit 31 in normal CPUID used for nonstandard 3DNow ID;
700 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */
701 clear_bit(0*32+31, &c->x86_capability);
703 /* On C+ stepping K8 rep microcode works well for copy/memset */
704 level = cpuid_eax(1);
705 if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58))
706 set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability);
708 /* Enable workaround for FXSAVE leak */
710 set_bit(X86_FEATURE_FXSAVE_LEAK, &c->x86_capability);
712 level = get_model_name(c);
716 /* Should distinguish Models here, but this is only
717 a fallback anyways. */
718 strcpy(c->x86_model_id, "Hammer");
722 display_cacheinfo(c);
724 /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
725 if (c->x86_power & (1<<8))
726 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
728 /* Multi core CPU? */
729 if (c->extended_cpuid_level >= 0x80000008)
732 /* Fix cpuid4 emulation for more */
733 num_cache_leaves = 3;
736 static void __cpuinit detect_ht(struct cpuinfo_x86 *c)
739 u32 eax, ebx, ecx, edx;
740 int index_msb, core_bits;
742 cpuid(1, &eax, &ebx, &ecx, &edx);
745 if (!cpu_has(c, X86_FEATURE_HT))
747 if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
750 smp_num_siblings = (ebx & 0xff0000) >> 16;
752 if (smp_num_siblings == 1) {
753 printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
754 } else if (smp_num_siblings > 1 ) {
756 if (smp_num_siblings > NR_CPUS) {
757 printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings);
758 smp_num_siblings = 1;
762 index_msb = get_count_order(smp_num_siblings);
763 c->phys_proc_id = phys_pkg_id(index_msb);
765 smp_num_siblings = smp_num_siblings / c->x86_max_cores;
767 index_msb = get_count_order(smp_num_siblings) ;
769 core_bits = get_count_order(c->x86_max_cores);
771 c->cpu_core_id = phys_pkg_id(index_msb) &
772 ((1 << core_bits) - 1);
775 if ((c->x86_max_cores * smp_num_siblings) > 1) {
776 printk(KERN_INFO "CPU: Physical Processor ID: %d\n", c->phys_proc_id);
777 printk(KERN_INFO "CPU: Processor Core ID: %d\n", c->cpu_core_id);
784 * find out the number of processor cores on the die
786 static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c)
790 if (c->cpuid_level < 4)
793 cpuid_count(4, 0, &eax, &t, &t, &t);
796 return ((eax >> 26) + 1);
801 static void srat_detect_node(void)
805 int cpu = smp_processor_id();
806 int apicid = hard_smp_processor_id();
808 /* Don't do the funky fallback heuristics the AMD version employs
810 node = apicid_to_node[apicid];
811 if (node == NUMA_NO_NODE)
812 node = first_node(node_online_map);
813 numa_set_node(cpu, node);
816 printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node);
820 static void __cpuinit init_intel(struct cpuinfo_x86 *c)
825 init_intel_cacheinfo(c);
826 if (c->cpuid_level > 9 ) {
827 unsigned eax = cpuid_eax(10);
828 /* Check for version and the number of counters */
829 if ((eax & 0xff) && (((eax>>8) & 0xff) > 1))
830 set_bit(X86_FEATURE_ARCH_PERFMON, &c->x86_capability);
833 n = c->extended_cpuid_level;
834 if (n >= 0x80000008) {
835 unsigned eax = cpuid_eax(0x80000008);
836 c->x86_virt_bits = (eax >> 8) & 0xff;
837 c->x86_phys_bits = eax & 0xff;
838 /* CPUID workaround for Intel 0F34 CPU */
839 if (c->x86_vendor == X86_VENDOR_INTEL &&
840 c->x86 == 0xF && c->x86_model == 0x3 &&
842 c->x86_phys_bits = 36;
846 c->x86_cache_alignment = c->x86_clflush_size * 2;
847 if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
848 (c->x86 == 0x6 && c->x86_model >= 0x0e))
849 set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability);
850 set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability);
851 c->x86_max_cores = intel_num_cpu_cores(c);
856 static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
858 char *v = c->x86_vendor_id;
860 if (!strcmp(v, "AuthenticAMD"))
861 c->x86_vendor = X86_VENDOR_AMD;
862 else if (!strcmp(v, "GenuineIntel"))
863 c->x86_vendor = X86_VENDOR_INTEL;
865 c->x86_vendor = X86_VENDOR_UNKNOWN;
868 struct cpu_model_info {
871 char *model_names[16];
874 /* Do some early cpuid on the boot CPU to get some parameter that are
875 needed before check_bugs. Everything advanced is in identify_cpu
877 void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
881 c->loops_per_jiffy = loops_per_jiffy;
882 c->x86_cache_size = -1;
883 c->x86_vendor = X86_VENDOR_UNKNOWN;
884 c->x86_model = c->x86_mask = 0; /* So far unknown... */
885 c->x86_vendor_id[0] = '\0'; /* Unset */
886 c->x86_model_id[0] = '\0'; /* Unset */
887 c->x86_clflush_size = 64;
888 c->x86_cache_alignment = c->x86_clflush_size;
889 c->x86_max_cores = 1;
890 c->extended_cpuid_level = 0;
891 memset(&c->x86_capability, 0, sizeof c->x86_capability);
893 /* Get vendor name */
894 cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
895 (unsigned int *)&c->x86_vendor_id[0],
896 (unsigned int *)&c->x86_vendor_id[8],
897 (unsigned int *)&c->x86_vendor_id[4]);
901 /* Initialize the standard set of capabilities */
902 /* Note that the vendor-specific code below might override */
904 /* Intel-defined flags: level 0x00000001 */
905 if (c->cpuid_level >= 0x00000001) {
907 cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
908 &c->x86_capability[0]);
909 c->x86 = (tfms >> 8) & 0xf;
910 c->x86_model = (tfms >> 4) & 0xf;
911 c->x86_mask = tfms & 0xf;
913 c->x86 += (tfms >> 20) & 0xff;
915 c->x86_model += ((tfms >> 16) & 0xF) << 4;
916 if (c->x86_capability[0] & (1<<19))
917 c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
919 /* Have CPUID level 0 only - unheard of */
924 c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
929 * This does the hard work of actually picking apart the CPU stuff...
931 void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
936 early_identify_cpu(c);
938 /* AMD-defined flags: level 0x80000001 */
939 xlvl = cpuid_eax(0x80000000);
940 c->extended_cpuid_level = xlvl;
941 if ((xlvl & 0xffff0000) == 0x80000000) {
942 if (xlvl >= 0x80000001) {
943 c->x86_capability[1] = cpuid_edx(0x80000001);
944 c->x86_capability[6] = cpuid_ecx(0x80000001);
946 if (xlvl >= 0x80000004)
947 get_model_name(c); /* Default name */
950 /* Transmeta-defined flags: level 0x80860001 */
951 xlvl = cpuid_eax(0x80860000);
952 if ((xlvl & 0xffff0000) == 0x80860000) {
953 /* Don't set x86_cpuid_level here for now to not confuse. */
954 if (xlvl >= 0x80860001)
955 c->x86_capability[2] = cpuid_edx(0x80860001);
958 c->apicid = phys_pkg_id(0);
961 * Vendor-specific initialization. In this section we
962 * canonicalize the feature flags, meaning if there are
963 * features a certain CPU supports which CPUID doesn't
964 * tell us, CPUID claiming incorrect flags, or other bugs,
965 * we handle them here.
967 * At the end of this section, c->x86_capability better
968 * indicate the features this CPU genuinely supports!
970 switch (c->x86_vendor) {
975 case X86_VENDOR_INTEL:
979 case X86_VENDOR_UNKNOWN:
981 display_cacheinfo(c);
985 select_idle_routine(c);
989 * On SMP, boot_cpu_data holds the common feature set between
990 * all CPUs; so make sure that we indicate which features are
991 * common between the CPUs. The first time this routine gets
992 * executed, c == &boot_cpu_data.
994 if (c != &boot_cpu_data) {
995 /* AND the already accumulated flags with these */
996 for (i = 0 ; i < NCAPINTS ; i++)
997 boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
1000 #ifdef CONFIG_X86_MCE
1003 if (c == &boot_cpu_data)
1008 numa_add_cpu(smp_processor_id());
1013 void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
1015 if (c->x86_model_id[0])
1016 printk("%s", c->x86_model_id);
1018 if (c->x86_mask || c->cpuid_level >= 0)
1019 printk(" stepping %02x\n", c->x86_mask);
1025 * Get CPU information for use by the procfs.
1028 static int show_cpuinfo(struct seq_file *m, void *v)
1030 struct cpuinfo_x86 *c = v;
1033 * These flag bits must match the definitions in <asm/cpufeature.h>.
1034 * NULL means this bit is undefined or reserved; either way it doesn't
1035 * have meaning as far as Linux is concerned. Note that it's important
1036 * to realize there is a difference between this table and CPUID -- if
1037 * applications want to get the raw CPUID data, they should access
1038 * /dev/cpu/<cpu_nr>/cpuid instead.
1040 static char *x86_cap_flags[] = {
1042 "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
1043 "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
1044 "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
1045 "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", NULL,
1048 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1049 NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
1050 NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL,
1051 NULL, "fxsr_opt", NULL, "rdtscp", NULL, "lm", "3dnowext", "3dnow",
1053 /* Transmeta-defined */
1054 "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
1055 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1056 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1057 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1059 /* Other (Linux-defined) */
1060 "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
1061 "constant_tsc", NULL, NULL,
1062 "up", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1063 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1064 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1066 /* Intel-defined (#2) */
1067 "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
1068 "tm2", NULL, "cid", NULL, NULL, "cx16", "xtpr", NULL,
1069 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1070 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1072 /* VIA/Cyrix/Centaur-defined */
1073 NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
1074 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1075 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1076 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1078 /* AMD-defined (#2) */
1079 "lahf_lm", "cmp_legacy", "svm", NULL, "cr8_legacy", NULL, NULL, NULL,
1080 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1081 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1082 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1084 static char *x86_power_flags[] = {
1085 "ts", /* temperature sensor */
1086 "fid", /* frequency id control */
1087 "vid", /* voltage id control */
1088 "ttp", /* thermal trip */
1092 /* nothing */ /* constant_tsc - moved to flags */
1097 if (!cpu_online(c-cpu_data))
1101 seq_printf(m,"processor\t: %u\n"
1103 "cpu family\t: %d\n"
1105 "model name\t: %s\n",
1106 (unsigned)(c-cpu_data),
1107 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
1110 c->x86_model_id[0] ? c->x86_model_id : "unknown");
1112 if (c->x86_mask || c->cpuid_level >= 0)
1113 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
1115 seq_printf(m, "stepping\t: unknown\n");
1117 if (cpu_has(c,X86_FEATURE_TSC)) {
1118 unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data));
1121 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
1122 freq / 1000, (freq % 1000));
1126 if (c->x86_cache_size >= 0)
1127 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
1130 if (smp_num_siblings * c->x86_max_cores > 1) {
1131 int cpu = c - cpu_data;
1132 seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
1133 seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[cpu]));
1134 seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
1135 seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
1141 "fpu_exception\t: yes\n"
1142 "cpuid level\t: %d\n"
1149 for ( i = 0 ; i < 32*NCAPINTS ; i++ )
1150 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
1151 seq_printf(m, " %s", x86_cap_flags[i]);
1154 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
1155 c->loops_per_jiffy/(500000/HZ),
1156 (c->loops_per_jiffy/(5000/HZ)) % 100);
1158 if (c->x86_tlbsize > 0)
1159 seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize);
1160 seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size);
1161 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment);
1163 seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n",
1164 c->x86_phys_bits, c->x86_virt_bits);
1166 seq_printf(m, "power management:");
1169 for (i = 0; i < 32; i++)
1170 if (c->x86_power & (1 << i)) {
1171 if (i < ARRAY_SIZE(x86_power_flags) &&
1173 seq_printf(m, "%s%s",
1174 x86_power_flags[i][0]?" ":"",
1175 x86_power_flags[i]);
1177 seq_printf(m, " [%d]", i);
1181 seq_printf(m, "\n\n");
1186 static void *c_start(struct seq_file *m, loff_t *pos)
1188 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
1191 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1194 return c_start(m, pos);
1197 static void c_stop(struct seq_file *m, void *v)
1201 struct seq_operations cpuinfo_op = {
1205 .show = show_cpuinfo,
1208 #if defined(CONFIG_INPUT_PCSPKR) || defined(CONFIG_INPUT_PCSPKR_MODULE)
1209 #include <linux/platform_device.h>
1210 static __init int add_pcspkr(void)
1212 struct platform_device *pd;
1215 pd = platform_device_alloc("pcspkr", -1);
1219 ret = platform_device_add(pd);
1221 platform_device_put(pd);
1225 device_initcall(add_pcspkr);