diff options
Diffstat (limited to 'arch/x86/kernel/setup_64.c')
| -rw-r--r-- | arch/x86/kernel/setup_64.c | 1117 |
1 files changed, 1117 insertions, 0 deletions
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c new file mode 100644 index 000000000000..af838f6b0b7f --- /dev/null +++ b/arch/x86/kernel/setup_64.c @@ -0,0 +1,1117 @@ +/* + * linux/arch/x86-64/kernel/setup.c + * + * Copyright (C) 1995 Linus Torvalds + * + * Nov 2001 Dave Jones <davej@suse.de> + * Forked from i386 setup code. + */ + +/* + * This file handles the architecture-dependent parts of initialization + */ + +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/stddef.h> +#include <linux/unistd.h> +#include <linux/ptrace.h> +#include <linux/slab.h> +#include <linux/user.h> +#include <linux/a.out.h> +#include <linux/screen_info.h> +#include <linux/ioport.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/initrd.h> +#include <linux/highmem.h> +#include <linux/bootmem.h> +#include <linux/module.h> +#include <asm/processor.h> +#include <linux/console.h> +#include <linux/seq_file.h> +#include <linux/crash_dump.h> +#include <linux/root_dev.h> +#include <linux/pci.h> +#include <linux/acpi.h> +#include <linux/kallsyms.h> +#include <linux/edd.h> +#include <linux/mmzone.h> +#include <linux/kexec.h> +#include <linux/cpufreq.h> +#include <linux/dmi.h> +#include <linux/dma-mapping.h> +#include <linux/ctype.h> + +#include <asm/mtrr.h> +#include <asm/uaccess.h> +#include <asm/system.h> +#include <asm/io.h> +#include <asm/smp.h> +#include <asm/msr.h> +#include <asm/desc.h> +#include <video/edid.h> +#include <asm/e820.h> +#include <asm/dma.h> +#include <asm/mpspec.h> +#include <asm/mmu_context.h> +#include <asm/bootsetup.h> +#include <asm/proto.h> +#include <asm/setup.h> +#include <asm/mach_apic.h> +#include <asm/numa.h> +#include <asm/sections.h> +#include <asm/dmi.h> + +/* + * Machine setup.. + */ + +struct cpuinfo_x86 boot_cpu_data __read_mostly; +EXPORT_SYMBOL(boot_cpu_data); + +unsigned long mmu_cr4_features; + +/* Boot loader ID as an integer, for the benefit of proc_dointvec */ +int bootloader_type; + +unsigned long saved_video_mode; + +int force_mwait __cpuinitdata; + +/* + * Early DMI memory + */ +int dmi_alloc_index; +char dmi_alloc_data[DMI_MAX_DATA]; + +/* + * Setup options + */ +struct screen_info screen_info; +EXPORT_SYMBOL(screen_info); +struct sys_desc_table_struct { + unsigned short length; + unsigned char table[0]; +}; + +struct edid_info edid_info; +EXPORT_SYMBOL_GPL(edid_info); + +extern int root_mountflags; + +char __initdata command_line[COMMAND_LINE_SIZE]; + +struct resource standard_io_resources[] = { + { .name = "dma1", .start = 0x00, .end = 0x1f, + .flags = IORESOURCE_BUSY | IORESOURCE_IO }, + { .name = "pic1", .start = 0x20, .end = 0x21, + .flags = IORESOURCE_BUSY | IORESOURCE_IO }, + { .name = "timer0", .start = 0x40, .end = 0x43, + .flags = IORESOURCE_BUSY | IORESOURCE_IO }, + { .name = "timer1", .start = 0x50, .end = 0x53, + .flags = IORESOURCE_BUSY | IORESOURCE_IO }, + { .name = "keyboard", .start = 0x60, .end = 0x6f, + .flags = IORESOURCE_BUSY | IORESOURCE_IO }, + { .name = "dma page reg", .start = 0x80, .end = 0x8f, + .flags = IORESOURCE_BUSY | IORESOURCE_IO }, + { .name = "pic2", .start = 0xa0, .end = 0xa1, + .flags = IORESOURCE_BUSY | IORESOURCE_IO }, + { .name = "dma2", .start = 0xc0, .end = 0xdf, + .flags = IORESOURCE_BUSY | IORESOURCE_IO }, + { .name = "fpu", .start = 0xf0, .end = 0xff, + .flags = IORESOURCE_BUSY | IORESOURCE_IO } +}; + +#define IORESOURCE_RAM (IORESOURCE_BUSY | IORESOURCE_MEM) + +struct resource data_resource = { + .name = "Kernel data", + .start = 0, + .end = 0, + .flags = IORESOURCE_RAM, +}; +struct resource code_resource = { + .name = "Kernel code", + .start = 0, + .end = 0, + .flags = IORESOURCE_RAM, +}; + +#ifdef CONFIG_PROC_VMCORE +/* elfcorehdr= specifies the location of elf core header + * stored by the crashed kernel. This option will be passed + * by kexec loader to the capture kernel. + */ +static int __init setup_elfcorehdr(char *arg) +{ + char *end; + if (!arg) + return -EINVAL; + elfcorehdr_addr = memparse(arg, &end); + return end > arg ? 0 : -EINVAL; +} +early_param("elfcorehdr", setup_elfcorehdr); +#endif + +#ifndef CONFIG_NUMA +static void __init +contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn) +{ + unsigned long bootmap_size, bootmap; + + bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT; + bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size); + if (bootmap == -1L) + panic("Cannot find bootmem map of size %ld\n",bootmap_size); + bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn); + e820_register_active_regions(0, start_pfn, end_pfn); + free_bootmem_with_active_regions(0, end_pfn); + reserve_bootmem(bootmap, bootmap_size); +} +#endif + +#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) +struct edd edd; +#ifdef CONFIG_EDD_MODULE +EXPORT_SYMBOL(edd); +#endif +/** + * copy_edd() - Copy the BIOS EDD information + * from boot_params into a safe place. + * + */ +static inline void copy_edd(void) +{ + memcpy(edd.mbr_signature, EDD_MBR_SIGNATURE, sizeof(edd.mbr_signature)); + memcpy(edd.edd_info, EDD_BUF, sizeof(edd.edd_info)); + edd.mbr_signature_nr = EDD_MBR_SIG_NR; + edd.edd_info_nr = EDD_NR; +} +#else +static inline void copy_edd(void) +{ +} +#endif + +#define EBDA_ADDR_POINTER 0x40E + +unsigned __initdata ebda_addr; +unsigned __initdata ebda_size; + +static void discover_ebda(void) +{ + /* + * there is a real-mode segmented pointer pointing to the + * 4K EBDA area at 0x40E + */ + ebda_addr = *(unsigned short *)__va(EBDA_ADDR_POINTER); + ebda_addr <<= 4; + + ebda_size = *(unsigned short *)__va(ebda_addr); + + /* Round EBDA up to pages */ + if (ebda_size == 0) + ebda_size = 1; + ebda_size <<= 10; + ebda_size = round_up(ebda_size + (ebda_addr & ~PAGE_MASK), PAGE_SIZE); + if (ebda_size > 64*1024) + ebda_size = 64*1024; +} + +void __init setup_arch(char **cmdline_p) +{ + printk(KERN_INFO "Command line: %s\n", boot_command_line); + + ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); + screen_info = SCREEN_INFO; + edid_info = EDID_INFO; + saved_video_mode = SAVED_VIDEO_MODE; + bootloader_type = LOADER_TYPE; + +#ifdef CONFIG_BLK_DEV_RAM + rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; + rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); + rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); +#endif + setup_memory_region(); + copy_edd(); + + if (!MOUNT_ROOT_RDONLY) + root_mountflags &= ~MS_RDONLY; + init_mm.start_code = (unsigned long) &_text; + init_mm.end_code = (unsigned long) &_etext; + init_mm.end_data = (unsigned long) &_edata; + init_mm.brk = (unsigned long) &_end; + + code_resource.start = virt_to_phys(&_text); + code_resource.end = virt_to_phys(&_etext)-1; + data_resource.start = virt_to_phys(&_etext); + data_resource.end = virt_to_phys(&_edata)-1; + + early_identify_cpu(&boot_cpu_data); + + strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); + *cmdline_p = command_line; + + parse_early_param(); + + finish_e820_parsing(); + + e820_register_active_regions(0, 0, -1UL); + /* + * partially used pages are not usable - thus + * we are rounding upwards: + */ + end_pfn = e820_end_of_ram(); + num_physpages = end_pfn; + + check_efer(); + + discover_ebda(); + + init_memory_mapping(0, (end_pfn_map << PAGE_SHIFT)); + + dmi_scan_machine(); + +#ifdef CONFIG_ACPI + /* + * Initialize the ACPI boot-time table parser (gets the RSDP and SDT). + * Call this early for SRAT node setup. + */ + acpi_boot_table_init(); +#endif + + /* How many end-of-memory variables you have, grandma! */ + max_low_pfn = end_pfn; + max_pfn = end_pfn; + high_memory = (void *)__va(end_pfn * PAGE_SIZE - 1) + 1; + + /* Remove active ranges so rediscovery with NUMA-awareness happens */ + remove_all_active_ranges(); + +#ifdef CONFIG_ACPI_NUMA + /* + * Parse SRAT to discover nodes. + */ + acpi_numa_init(); +#endif + +#ifdef CONFIG_NUMA + numa_initmem_init(0, end_pfn); +#else + contig_initmem_init(0, end_pfn); +#endif + + /* Reserve direct mapping */ + reserve_bootmem_generic(table_start << PAGE_SHIFT, + (table_end - table_start) << PAGE_SHIFT); + + /* reserve kernel */ + reserve_bootmem_generic(__pa_symbol(&_text), + __pa_symbol(&_end) - __pa_symbol(&_text)); + + /* + * reserve physical page 0 - it's a special BIOS page on many boxes, + * enabling clean reboots, SMP operation, laptop functions. + */ + reserve_bootmem_generic(0, PAGE_SIZE); + + /* reserve ebda region */ + if (ebda_addr) + reserve_bootmem_generic(ebda_addr, ebda_size); +#ifdef CONFIG_NUMA + /* reserve nodemap region */ + if (nodemap_addr) + reserve_bootmem_generic(nodemap_addr, nodemap_size); +#endif + +#ifdef CONFIG_SMP + /* Reserve SMP trampoline */ + reserve_bootmem_generic(SMP_TRAMPOLINE_BASE, 2*PAGE_SIZE); +#endif + +#ifdef CONFIG_ACPI_SLEEP + /* + * Reserve low memory region for sleep support. + */ + acpi_reserve_bootmem(); +#endif + /* + * Find and reserve possible boot-time SMP configuration: + */ + find_smp_config(); +#ifdef CONFIG_BLK_DEV_INITRD + if (LOADER_TYPE && INITRD_START) { + if (INITRD_START + INITRD_SIZE <= (end_pfn << PAGE_SHIFT)) { + reserve_bootmem_generic(INITRD_START, INITRD_SIZE); + initrd_start = INITRD_START + PAGE_OFFSET; + initrd_end = initrd_start+INITRD_SIZE; + } + else { + printk(KERN_ERR "initrd extends beyond end of memory " + "(0x%08lx > 0x%08lx)\ndisabling initrd\n", + (unsigned long)(INITRD_START + INITRD_SIZE), + (unsigned long)(end_pfn << PAGE_SHIFT)); + initrd_start = 0; + } + } +#endif +#ifdef CONFIG_KEXEC + if (crashk_res.start != crashk_res.end) { + reserve_bootmem_generic(crashk_res.start, + crashk_res.end - crashk_res.start + 1); + } +#endif + + paging_init(); + +#ifdef CONFIG_PCI + early_quirks(); +#endif + + /* + * set this early, so we dont allocate cpu0 + * if MADT list doesnt list BSP first + * mpparse.c/MP_processor_info() allocates logical cpu numbers. + */ + cpu_set(0, cpu_present_map); +#ifdef CONFIG_ACPI + /* + * Read APIC and some other early information from ACPI tables. + */ + acpi_boot_init(); +#endif + + init_cpu_to_node(); + + /* + * get boot-time SMP configuration: + */ + if (smp_found_config) + get_smp_config(); + init_apic_mappings(); + + /* + * We trust e820 completely. No explicit ROM probing in memory. + */ + e820_reserve_resources(); + e820_mark_nosave_regions(); + + { + unsigned i; + /* request I/O space for devices used on all i[345]86 PCs */ + for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) + request_resource(&ioport_resource, &standard_io_resources[i]); + } + + e820_setup_gap(); + +#ifdef CONFIG_VT +#if defined(CONFIG_VGA_CONSOLE) + conswitchp = &vga_con; +#elif defined(CONFIG_DUMMY_CONSOLE) + conswitchp = &dummy_con; +#endif +#endif +} + +static int __cpuinit get_model_name(struct cpuinfo_x86 *c) +{ + unsigned int *v; + + if (c->extended_cpuid_level < 0x80000004) + return 0; + + v = (unsigned int *) c->x86_model_id; + cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]); + cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]); + cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]); + c->x86_model_id[48] = 0; + return 1; +} + + +static void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c) +{ + unsigned int n, dummy, eax, ebx, ecx, edx; + + n = c->extended_cpuid_level; + + if (n >= 0x80000005) { + cpuid(0x80000005, &dummy, &ebx, &ecx, &edx); + printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), D cache %dK (%d bytes/line)\n", + edx>>24, edx&0xFF, ecx>>24, ecx&0xFF); + c->x86_cache_size=(ecx>>24)+(edx>>24); + /* On K8 L1 TLB is inclusive, so don't count it */ + c->x86_tlbsize = 0; + } + + if (n >= 0x80000006) { + cpuid(0x80000006, &dummy, &ebx, &ecx, &edx); + ecx = cpuid_ecx(0x80000006); + c->x86_cache_size = ecx >> 16; + c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff); + + printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n", + c->x86_cache_size, ecx & 0xFF); + } + + if (n >= 0x80000007) + cpuid(0x80000007, &dummy, &dummy, &dummy, &c->x86_power); + if (n >= 0x80000008) { + cpuid(0x80000008, &eax, &dummy, &dummy, &dummy); + c->x86_virt_bits = (eax >> 8) & 0xff; + c->x86_phys_bits = eax & 0xff; + } +} + +#ifdef CONFIG_NUMA +static int nearby_node(int apicid) +{ + int i; + for (i = apicid - 1; i >= 0; i--) { + int node = apicid_to_node[i]; + if (node != NUMA_NO_NODE && node_online(node)) + return node; + } + for (i = apicid + 1; i < MAX_LOCAL_APIC; i++) { + int node = apicid_to_node[i]; + if (node != NUMA_NO_NODE && node_online(node)) + return node; + } + return first_node(node_online_map); /* Shouldn't happen */ +} +#endif + +/* + * On a AMD dual core setup the lower bits of the APIC id distingush the cores. + * Assumes number of cores is a power of two. + */ +static void __init amd_detect_cmp(struct cpuinfo_x86 *c) +{ +#ifdef CONFIG_SMP + unsigned bits; +#ifdef CONFIG_NUMA + int cpu = smp_processor_id(); + int node = 0; + unsigned apicid = hard_smp_processor_id(); +#endif + unsigned ecx = cpuid_ecx(0x80000008); + + c->x86_max_cores = (ecx & 0xff) + 1; + + /* CPU telling us the core id bits shift? */ + bits = (ecx >> 12) & 0xF; + + /* Otherwise recompute */ + if (bits == 0) { + while ((1 << bits) < c->x86_max_cores) + bits++; + } + + /* Low order bits define the core id (index of core in socket) */ + c->cpu_core_id = c->phys_proc_id & ((1 << bits)-1); + /* Convert the APIC ID into the socket ID */ + c->phys_proc_id = phys_pkg_id(bits); + +#ifdef CONFIG_NUMA + node = c->phys_proc_id; + if (apicid_to_node[apicid] != NUMA_NO_NODE) + node = apicid_to_node[apicid]; + if (!node_online(node)) { + /* Two possibilities here: + - The CPU is missing memory and no node was created. + In that case try picking one from a nearby CPU + - The APIC IDs differ from the HyperTransport node IDs + which the K8 northbridge parsing fills in. + Assume they are all increased by a constant offset, + but in the same order as the HT nodeids. + If that doesn't result in a usable node fall back to the + path for the previous case. */ + int ht_nodeid = apicid - (cpu_data[0].phys_proc_id << bits); + if (ht_nodeid >= 0 && + apicid_to_node[ht_nodeid] != NUMA_NO_NODE) + node = apicid_to_node[ht_nodeid]; + /* Pick a nearby node */ + if (!node_online(node)) + node = nearby_node(apicid); + } + numa_set_node(cpu, node); + + printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node); +#endif +#endif +} + +static void __cpuinit init_amd(struct cpuinfo_x86 *c) +{ + unsigned level; + +#ifdef CONFIG_SMP + unsigned long value; + + /* + * Disable TLB flush filter by setting HWCR.FFDIS on K8 + * bit 6 of msr C001_0015 + * + * Errata 63 for SH-B3 steppings + * Errata 122 for all steppings (F+ have it disabled by default) + */ + if (c->x86 == 15) { + rdmsrl(MSR_K8_HWCR, value); + value |= 1 << 6; + wrmsrl(MSR_K8_HWCR, value); + } +#endif + + /* Bit 31 in normal CPUID used for nonstandard 3DNow ID; + 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway */ + clear_bit(0*32+31, &c->x86_capability); + + /* On C+ stepping K8 rep microcode works well for copy/memset */ + level = cpuid_eax(1); + if (c->x86 == 15 && ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58)) + set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability); + if (c->x86 == 0x10) + set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability); + + /* Enable workaround for FXSAVE leak */ + if (c->x86 >= 6) + set_bit(X86_FEATURE_FXSAVE_LEAK, &c->x86_capability); + + level = get_model_name(c); + if (!level) { + switch (c->x86) { + case 15: + /* Should distinguish Models here, but this is only + a fallback anyways. */ + strcpy(c->x86_model_id, "Hammer"); + break; + } + } + display_cacheinfo(c); + + /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */ + if (c->x86_power & (1<<8)) + set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability); + + /* Multi core CPU? */ + if (c->extended_cpuid_level >= 0x80000008) + amd_detect_cmp(c); + + if (c->extended_cpuid_level >= 0x80000006 && + (cpuid_edx(0x80000006) & 0xf000)) + num_cache_leaves = 4; + else + num_cache_leaves = 3; + + if (c->x86 == 0xf || c->x86 == 0x10 || c->x86 == 0x11) + set_bit(X86_FEATURE_K8, &c->x86_capability); + + /* RDTSC can be speculated around */ + clear_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability); + + /* Family 10 doesn't support C states in MWAIT so don't use it */ + if (c->x86 == 0x10 && !force_mwait) + clear_bit(X86_FEATURE_MWAIT, &c->x86_capability); +} + +static void __cpuinit detect_ht(struct cpuinfo_x86 *c) +{ +#ifdef CONFIG_SMP + u32 eax, ebx, ecx, edx; + int index_msb, core_bits; + + cpuid(1, &eax, &ebx, &ecx, &edx); + + + if (!cpu_has(c, X86_FEATURE_HT)) + return; + if (cpu_has(c, X86_FEATURE_CMP_LEGACY)) + goto out; + + smp_num_siblings = (ebx & 0xff0000) >> 16; + + if (smp_num_siblings == 1) { + printk(KERN_INFO "CPU: Hyper-Threading is disabled\n"); + } else if (smp_num_siblings > 1 ) { + + if (smp_num_siblings > NR_CPUS) { + printk(KERN_WARNING "CPU: Unsupported number of the siblings %d", smp_num_siblings); + smp_num_siblings = 1; + return; + } + + index_msb = get_count_order(smp_num_siblings); + c->phys_proc_id = phys_pkg_id(index_msb); + + smp_num_siblings = smp_num_siblings / c->x86_max_cores; + + index_msb = get_count_order(smp_num_siblings) ; + + core_bits = get_count_order(c->x86_max_cores); + + c->cpu_core_id = phys_pkg_id(index_msb) & + ((1 << core_bits) - 1); + } +out: + if ((c->x86_max_cores * smp_num_siblings) > 1) { + printk(KERN_INFO "CPU: Physical Processor ID: %d\n", c->phys_proc_id); + printk(KERN_INFO "CPU: Processor Core ID: %d\n", c->cpu_core_id); + } + +#endif +} + +/* + * find out the number of processor cores on the die + */ +static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c) +{ + unsigned int eax, t; + + if (c->cpuid_level < 4) + return 1; + + cpuid_count(4, 0, &eax, &t, &t, &t); + + if (eax & 0x1f) + return ((eax >> 26) + 1); + else + return 1; +} + +static void srat_detect_node(void) +{ +#ifdef CONFIG_NUMA + unsigned node; + int cpu = smp_processor_id(); + int apicid = hard_smp_processor_id(); + + /* Don't do the funky fallback heuristics the AMD version employs + for now. */ + node = apicid_to_node[apicid]; + if (node == NUMA_NO_NODE) + node = first_node(node_online_map); + numa_set_node(cpu, node); + + printk(KERN_INFO "CPU %d/%x -> Node %d\n", cpu, apicid, node); +#endif +} + +static void __cpuinit init_intel(struct cpuinfo_x86 *c) +{ + /* Cache sizes */ + unsigned n; + + init_intel_cacheinfo(c); + if (c->cpuid_level > 9 ) { + unsigned eax = cpuid_eax(10); + /* Check for version and the number of counters */ + if ((eax & 0xff) && (((eax>>8) & 0xff) > 1)) + set_bit(X86_FEATURE_ARCH_PERFMON, &c->x86_capability); + } + + if (cpu_has_ds) { + unsigned int l1, l2; + rdmsr(MSR_IA32_MISC_ENABLE, l1, l2); + if (!(l1 & (1<<11))) + set_bit(X86_FEATURE_BTS, c->x86_capability); + if (!(l1 & (1<<12))) + set_bit(X86_FEATURE_PEBS, c->x86_capability); + } + + n = c->extended_cpuid_level; + if (n >= 0x80000008) { + unsigned eax = cpuid_eax(0x80000008); + c->x86_virt_bits = (eax >> 8) & 0xff; + c->x86_phys_bits = eax & 0xff; + /* CPUID workaround for Intel 0F34 CPU */ + if (c->x86_vendor == X86_VENDOR_INTEL && + c->x86 == 0xF && c->x86_model == 0x3 && + c->x86_mask == 0x4) + c->x86_phys_bits = 36; + } + + if (c->x86 == 15) + c->x86_cache_alignment = c->x86_clflush_size * 2; + if ((c->x86 == 0xf && c->x86_model >= 0x03) || + (c->x86 == 0x6 && c->x86_model >= 0x0e)) + set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability); + if (c->x86 == 6) + set_bit(X86_FEATURE_REP_GOOD, &c->x86_capability); + if (c->x86 == 15) + set_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability); + else + clear_bit(X86_FEATURE_SYNC_RDTSC, &c->x86_capability); + c->x86_max_cores = intel_num_cpu_cores(c); + + srat_detect_node(); +} + +static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c) +{ + char *v = c->x86_vendor_id; + + if (!strcmp(v, "AuthenticAMD")) + c->x86_vendor = X86_VENDOR_AMD; + else if (!strcmp(v, "GenuineIntel")) + c->x86_vendor = X86_VENDOR_INTEL; + else + c->x86_vendor = X86_VENDOR_UNKNOWN; +} + +struct cpu_model_info { + int vendor; + int family; + char *model_names[16]; +}; + +/* Do some early cpuid on the boot CPU to get some parameter that are + needed before check_bugs. Everything advanced is in identify_cpu + below. */ +void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c) +{ + u32 tfms; + + c->loops_per_jiffy = loops_per_jiffy; + c->x86_cache_size = -1; + c->x86_vendor = X86_VENDOR_UNKNOWN; + c->x86_model = c->x86_mask = 0; /* So far unknown... */ + c->x86_vendor_id[0] = '\0'; /* Unset */ + c->x86_model_id[0] = '\0'; /* Unset */ + c->x86_clflush_size = 64; + c->x86_cache_alignment = c->x86_clflush_size; + c->x86_max_cores = 1; + c->extended_cpuid_level = 0; + memset(&c->x86_capability, 0, sizeof c->x86_capability); + + /* Get vendor name */ + cpuid(0x00000000, (unsigned int *)&c->cpuid_level, + (unsigned int *)&c->x86_vendor_id[0], + (unsigned int *)&c->x86_vendor_id[8], + (unsigned int *)&c->x86_vendor_id[4]); + + get_cpu_vendor(c); + + /* Initialize the standard set of capabilities */ + /* Note that the vendor-specific code below might override */ + + /* Intel-defined flags: level 0x00000001 */ + if (c->cpuid_level >= 0x00000001) { + __u32 misc; + cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4], + &c->x86_capability[0]); + c->x86 = (tfms >> 8) & 0xf; + c->x86_model = (tfms >> 4) & 0xf; + c->x86_mask = tfms & 0xf; + if (c->x86 == 0xf) + c->x86 += (tfms >> 20) & 0xff; + if (c->x86 >= 0x6) + c->x86_model += ((tfms >> 16) & 0xF) << 4; + if (c->x86_capability[0] & (1<<19)) + c->x86_clflush_size = ((misc >> 8) & 0xff) * 8; + } else { + /* Have CPUID level 0 only - unheard of */ + c->x86 = 4; + } + +#ifdef CONFIG_SMP + c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff; +#endif +} + +/* + * This does the hard work of actually picking apart the CPU stuff... + */ +void __cpuinit identify_cpu(struct cpuinfo_x86 *c) +{ + int i; + u32 xlvl; + + early_identify_cpu(c); + + /* AMD-defined flags: level 0x80000001 */ + xlvl = cpuid_eax(0x80000000); + c->extended_cpuid_level = xlvl; + if ((xlvl & 0xffff0000) == 0x80000000) { + if (xlvl >= 0x80000001) { + c->x86_capability[1] = cpuid_edx(0x80000001); + c->x86_capability[6] = cpuid_ecx(0x80000001); + } + if (xlvl >= 0x80000004) + get_model_name(c); /* Default name */ + } + + /* Transmeta-defined flags: level 0x80860001 */ + xlvl = cpuid_eax(0x80860000); + if ((xlvl & 0xffff0000) == 0x80860000) { + /* Don't set x86_cpuid_level here for now to not confuse. */ + if (xlvl >= 0x80860001) + c->x86_capability[2] = cpuid_edx(0x80860001); + } + + init_scattered_cpuid_features(c); + + c->apicid = phys_pkg_id(0); + + /* + * Vendor-specific initialization. In this section we + * canonicalize the feature flags, meaning if there are + * features a certain CPU supports which CPUID doesn't + * tell us, CPUID claiming incorrect flags, or other bugs, + * we handle them here. + * + * At the end of this section, c->x86_capability better + * indicate the features this CPU genuinely supports! + */ + switch (c->x86_vendor) { + case X86_VENDOR_AMD: + init_amd(c); + break; + + case X86_VENDOR_INTEL: + init_intel(c); + break; + + case X86_VENDOR_UNKNOWN: + default: + display_cacheinfo(c); + break; + } + + select_idle_routine(c); + detect_ht(c); + + /* + * On SMP, boot_cpu_data holds the common feature set between + * all CPUs; so make sure that we indicate which features are + * common between the CPUs. The first time this routine gets + * executed, c == &boot_cpu_data. + */ + if (c != &boot_cpu_data) { + /* AND the already accumulated flags with these */ + for (i = 0 ; i < NCAPINTS ; i++) + boot_cpu_data.x86_capability[i] &= c->x86_capability[i]; + } + +#ifdef CONFIG_X86_MCE + mcheck_init(c); +#endif + if (c != &boot_cpu_data) + mtrr_ap_init(); +#ifdef CONFIG_NUMA + numa_add_cpu(smp_processor_id()); +#endif +} + + +void __cpuinit print_cpu_info(struct cpuinfo_x86 *c) +{ + if (c->x86_model_id[0]) + printk("%s", c->x86_model_id); + + if (c->x86_mask || c->cpuid_level >= 0) + printk(" stepping %02x\n", c->x86_mask); + else + printk("\n"); +} + +/* + * Get CPU information for use by the procfs. + */ + +static int show_cpuinfo(struct seq_file *m, void *v) +{ + struct cpuinfo_x86 *c = v; + + /* + * These flag bits must match the definitions in <asm/cpufeature.h>. + * NULL means this bit is undefined or reserved; either way it doesn't + * have meaning as far as Linux is concerned. Note that it's important + * to realize there is a difference between this table and CPUID -- if + * applications want to get the raw CPUID data, they should access + * /dev/cpu/<cpu_nr>/cpuid instead. + */ + static char *x86_cap_flags[] = { + /* Intel-defined */ + "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce", + "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov", + "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx", + "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", "pbe", + + /* AMD-defined */ + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, "nx", NULL, "mmxext", NULL, + NULL, "fxsr_opt", "pdpe1gb", "rdtscp", NULL, "lm", + "3dnowext", "3dnow", + + /* Transmeta-defined */ + "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + + /* Other (Linux-defined) */ + "cxmmx", "k6_mtrr", "cyrix_arr", "centaur_mcr", + NULL, NULL, NULL, NULL, + "constant_tsc", "up", NULL, "arch_perfmon", + "pebs", "bts", NULL, "sync_rdtsc", + "rep_good", NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + + /* Intel-defined (#2) */ + "pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est", + "tm2", "ssse3", "cid", NULL, NULL, "cx16", "xtpr", NULL, + NULL, NULL, "dca", NULL, NULL, NULL, NULL, "popcnt", + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + + /* VIA/Cyrix/Centaur-defined */ + NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en", + "ace2", "ace2_en", "phe", "phe_en", "pmm", "pmm_en", NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + + /* AMD-defined (#2) */ + "lahf_lm", "cmp_legacy", "svm", "extapic", "cr8_legacy", + "altmovcr8", "abm", "sse4a", + "misalignsse", "3dnowprefetch", + "osvw", "ibs", NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + + /* Auxiliary (Linux-defined) */ + "ida", NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + }; + static char *x86_power_flags[] = { + "ts", /* temperature sensor */ + "fid", /* frequency id control */ + "vid", /* voltage id control */ + "ttp", /* thermal trip */ + "tm", + "stc", + "100mhzsteps", + "hwpstate", + "", /* tsc invariant mapped to constant_tsc */ + /* nothing */ + }; + + +#ifdef CONFIG_SMP + if (!cpu_online(c-cpu_data)) + return 0; +#endif + + seq_printf(m,"processor\t: %u\n" + "vendor_id\t: %s\n" + "cpu family\t: %d\n" + "model\t\t: %d\n" + "model name\t: %s\n", + (unsigned)(c-cpu_data), + c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown", + c->x86, + (int)c->x86_model, + c->x86_model_id[0] ? c->x86_model_id : "unknown"); + + if (c->x86_mask || c->cpuid_level >= 0) + seq_printf(m, "stepping\t: %d\n", c->x86_mask); + else + seq_printf(m, "stepping\t: unknown\n"); + + if (cpu_has(c,X86_FEATURE_TSC)) { + unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data)); + if (!freq) + freq = cpu_khz; + seq_printf(m, "cpu MHz\t\t: %u.%03u\n", + freq / 1000, (freq % 1000)); + } + + /* Cache size */ + if (c->x86_cache_size >= 0) + seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size); + +#ifdef CONFIG_SMP + if (smp_num_siblings * c->x86_max_cores > 1) { + int cpu = c - cpu_data; + seq_printf(m, "physical id\t: %d\n", c->phys_proc_id); + seq_printf(m, "siblings\t: %d\n", cpus_weight(cpu_core_map[cpu])); + seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id); + seq_printf(m, "cpu cores\t: %d\n", c->booted_cores); + } +#endif + + seq_printf(m, + "fpu\t\t: yes\n" + "fpu_exception\t: yes\n" + "cpuid level\t: %d\n" + "wp\t\t: yes\n" + "flags\t\t:", + c->cpuid_level); + + { + int i; + for ( i = 0 ; i < 32*NCAPINTS ; i++ ) + if (cpu_has(c, i) && x86_cap_flags[i] != NULL) + seq_printf(m, " %s", x86_cap_flags[i]); + } + + seq_printf(m, "\nbogomips\t: %lu.%02lu\n", + c->loops_per_jiffy/(500000/HZ), + (c->loops_per_jiffy/(5000/HZ)) % 100); + + if (c->x86_tlbsize > 0) + seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize); + seq_printf(m, "clflush size\t: %d\n", c->x86_clflush_size); + seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment); + + seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n", + c->x86_phys_bits, c->x86_virt_bits); + + seq_printf(m, "power management:"); + { + unsigned i; + for (i = 0; i < 32; i++) + if (c->x86_power & (1 << i)) { + if (i < ARRAY_SIZE(x86_power_flags) && + x86_power_flags[i]) + seq_printf(m, "%s%s", + x86_power_flags[i][0]?" ":"", + x86_power_flags[i]); + else + seq_printf(m, " [%d]", i); + } + } + + seq_printf(m, "\n\n"); + + return 0; +} + +static void *c_start(struct seq_file *m, loff_t *pos) +{ + return *pos < NR_CPUS ? cpu_data + *pos : NULL; +} + +static void *c_next(struct seq_file *m, void *v, loff_t *pos) +{ + ++*pos; + return c_start(m, pos); +} + +static void c_stop(struct seq_file *m, void *v) +{ +} + +struct seq_operations cpuinfo_op = { + .start =c_start, + .next = c_next, + .stop = c_stop, + .show = show_cpuinfo, +}; |
