x86: seperate funcs from setup_64 to cpu common_64.c
Signed-off-by: Yinghai Lu <yhlu.kernel@mail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
Ingo Molnar
parent
04606618bb
commit
f580366f77
4 changed files with 408 additions and 824 deletions
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@ -6,7 +6,7 @@ obj-y := intel_cacheinfo.o addon_cpuid_features.o
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obj-y += proc.o feature_names.o
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obj-$(CONFIG_X86_32) += common.o bugs.o
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obj-$(CONFIG_X86_64) += bugs_64.o
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obj-$(CONFIG_X86_64) += common_64.o bugs_64.o
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obj-$(CONFIG_X86_32) += amd.o
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obj-$(CONFIG_X86_64) += amd_64.o
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obj-$(CONFIG_X86_32) += cyrix.o
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406
arch/x86/kernel/cpu/common_64.c
Normal file
406
arch/x86/kernel/cpu/common_64.c
Normal file
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@ -0,0 +1,406 @@
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/smp.h>
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#include <linux/module.h>
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#include <linux/percpu.h>
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#include <linux/bootmem.h>
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#include <asm/processor.h>
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#include <asm/i387.h>
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#include <asm/msr.h>
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#include <asm/io.h>
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#include <asm/mmu_context.h>
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#include <asm/mtrr.h>
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#include <asm/mce.h>
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#include <asm/pat.h>
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#include <asm/numa.h>
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#ifdef CONFIG_X86_LOCAL_APIC
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#include <asm/mpspec.h>
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#include <asm/apic.h>
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#include <mach_apic.h>
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#endif
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#include "cpu.h"
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/* We need valid kernel segments for data and code in long mode too
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* IRET will check the segment types kkeil 2000/10/28
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* Also sysret mandates a special GDT layout
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*/
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/* The TLS descriptors are currently at a different place compared to i386.
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Hopefully nobody expects them at a fixed place (Wine?) */
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DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
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[GDT_ENTRY_KERNEL32_CS] = { { { 0x0000ffff, 0x00cf9b00 } } },
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[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00af9b00 } } },
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[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9300 } } },
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[GDT_ENTRY_DEFAULT_USER32_CS] = { { { 0x0000ffff, 0x00cffb00 } } },
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[GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff300 } } },
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[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00affb00 } } },
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} };
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EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
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__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
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/* Current gdt points %fs at the "master" per-cpu area: after this,
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* it's on the real one. */
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void switch_to_new_gdt(void)
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{
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struct desc_ptr gdt_descr;
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gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
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gdt_descr.size = GDT_SIZE - 1;
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load_gdt(&gdt_descr);
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}
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struct cpu_dev *cpu_devs[X86_VENDOR_NUM] = {};
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static void __cpuinit default_init(struct cpuinfo_x86 *c)
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{
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display_cacheinfo(c);
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}
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static struct cpu_dev __cpuinitdata default_cpu = {
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.c_init = default_init,
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.c_vendor = "Unknown",
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};
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static struct cpu_dev *this_cpu __cpuinitdata = &default_cpu;
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int __cpuinit get_model_name(struct cpuinfo_x86 *c)
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{
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unsigned int *v;
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if (c->extended_cpuid_level < 0x80000004)
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return 0;
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v = (unsigned int *) c->x86_model_id;
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cpuid(0x80000002, &v[0], &v[1], &v[2], &v[3]);
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cpuid(0x80000003, &v[4], &v[5], &v[6], &v[7]);
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cpuid(0x80000004, &v[8], &v[9], &v[10], &v[11]);
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c->x86_model_id[48] = 0;
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return 1;
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}
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void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
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{
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unsigned int n, dummy, eax, ebx, ecx, edx;
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n = c->extended_cpuid_level;
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if (n >= 0x80000005) {
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cpuid(0x80000005, &dummy, &ebx, &ecx, &edx);
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printk(KERN_INFO "CPU: L1 I Cache: %dK (%d bytes/line), "
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"D cache %dK (%d bytes/line)\n",
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edx>>24, edx&0xFF, ecx>>24, ecx&0xFF);
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c->x86_cache_size = (ecx>>24) + (edx>>24);
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/* On K8 L1 TLB is inclusive, so don't count it */
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c->x86_tlbsize = 0;
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}
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if (n >= 0x80000006) {
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cpuid(0x80000006, &dummy, &ebx, &ecx, &edx);
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ecx = cpuid_ecx(0x80000006);
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c->x86_cache_size = ecx >> 16;
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c->x86_tlbsize += ((ebx >> 16) & 0xfff) + (ebx & 0xfff);
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printk(KERN_INFO "CPU: L2 Cache: %dK (%d bytes/line)\n",
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c->x86_cache_size, ecx & 0xFF);
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}
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if (n >= 0x80000008) {
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cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
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c->x86_virt_bits = (eax >> 8) & 0xff;
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c->x86_phys_bits = eax & 0xff;
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}
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}
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void __cpuinit detect_ht(struct cpuinfo_x86 *c)
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{
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#ifdef CONFIG_SMP
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u32 eax, ebx, ecx, edx;
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int index_msb, core_bits;
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cpuid(1, &eax, &ebx, &ecx, &edx);
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if (!cpu_has(c, X86_FEATURE_HT))
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return;
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if (cpu_has(c, X86_FEATURE_CMP_LEGACY))
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goto out;
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smp_num_siblings = (ebx & 0xff0000) >> 16;
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if (smp_num_siblings == 1) {
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printk(KERN_INFO "CPU: Hyper-Threading is disabled\n");
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} else if (smp_num_siblings > 1) {
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if (smp_num_siblings > NR_CPUS) {
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printk(KERN_WARNING "CPU: Unsupported number of "
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"siblings %d", smp_num_siblings);
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smp_num_siblings = 1;
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return;
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}
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index_msb = get_count_order(smp_num_siblings);
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c->phys_proc_id = phys_pkg_id(index_msb);
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smp_num_siblings = smp_num_siblings / c->x86_max_cores;
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index_msb = get_count_order(smp_num_siblings);
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core_bits = get_count_order(c->x86_max_cores);
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c->cpu_core_id = phys_pkg_id(index_msb) &
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((1 << core_bits) - 1);
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}
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out:
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if ((c->x86_max_cores * smp_num_siblings) > 1) {
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printk(KERN_INFO "CPU: Physical Processor ID: %d\n",
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c->phys_proc_id);
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printk(KERN_INFO "CPU: Processor Core ID: %d\n",
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c->cpu_core_id);
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}
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#endif
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}
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static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
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{
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char *v = c->x86_vendor_id;
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int i;
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static int printed;
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for (i = 0; i < X86_VENDOR_NUM; i++) {
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if (cpu_devs[i]) {
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if (!strcmp(v, cpu_devs[i]->c_ident[0]) ||
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(cpu_devs[i]->c_ident[1] &&
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!strcmp(v, cpu_devs[i]->c_ident[1]))) {
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c->x86_vendor = i;
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this_cpu = cpu_devs[i];
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return;
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}
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}
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}
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if (!printed) {
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printed++;
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printk(KERN_ERR "CPU: Vendor unknown, using generic init.\n");
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printk(KERN_ERR "CPU: Your system may be unstable.\n");
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}
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c->x86_vendor = X86_VENDOR_UNKNOWN;
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}
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static void __init early_cpu_support_print(void)
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{
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int i,j;
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struct cpu_dev *cpu_devx;
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printk("KERNEL supported cpus:\n");
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for (i = 0; i < X86_VENDOR_NUM; i++) {
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cpu_devx = cpu_devs[i];
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if (!cpu_devx)
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continue;
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for (j = 0; j < 2; j++) {
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if (!cpu_devx->c_ident[j])
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continue;
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printk(" %s %s\n", cpu_devx->c_vendor,
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cpu_devx->c_ident[j]);
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}
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}
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}
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static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c);
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void __init early_cpu_init(void)
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{
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struct cpu_vendor_dev *cvdev;
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for (cvdev = __x86cpuvendor_start ;
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cvdev < __x86cpuvendor_end ;
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cvdev++)
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cpu_devs[cvdev->vendor] = cvdev->cpu_dev;
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early_cpu_support_print();
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early_identify_cpu(&boot_cpu_data);
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}
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/* Do some early cpuid on the boot CPU to get some parameter that are
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needed before check_bugs. Everything advanced is in identify_cpu
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below. */
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static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
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{
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u32 tfms, xlvl;
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c->loops_per_jiffy = loops_per_jiffy;
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c->x86_cache_size = -1;
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c->x86_vendor = X86_VENDOR_UNKNOWN;
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c->x86_model = c->x86_mask = 0; /* So far unknown... */
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c->x86_vendor_id[0] = '\0'; /* Unset */
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c->x86_model_id[0] = '\0'; /* Unset */
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c->x86_clflush_size = 64;
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c->x86_cache_alignment = c->x86_clflush_size;
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c->x86_max_cores = 1;
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c->x86_coreid_bits = 0;
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c->extended_cpuid_level = 0;
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memset(&c->x86_capability, 0, sizeof c->x86_capability);
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/* Get vendor name */
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cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
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(unsigned int *)&c->x86_vendor_id[0],
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(unsigned int *)&c->x86_vendor_id[8],
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(unsigned int *)&c->x86_vendor_id[4]);
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get_cpu_vendor(c);
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/* Initialize the standard set of capabilities */
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/* Note that the vendor-specific code below might override */
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/* Intel-defined flags: level 0x00000001 */
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if (c->cpuid_level >= 0x00000001) {
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__u32 misc;
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cpuid(0x00000001, &tfms, &misc, &c->x86_capability[4],
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&c->x86_capability[0]);
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c->x86 = (tfms >> 8) & 0xf;
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c->x86_model = (tfms >> 4) & 0xf;
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c->x86_mask = tfms & 0xf;
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if (c->x86 == 0xf)
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c->x86 += (tfms >> 20) & 0xff;
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if (c->x86 >= 0x6)
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c->x86_model += ((tfms >> 16) & 0xF) << 4;
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if (test_cpu_cap(c, X86_FEATURE_CLFLSH))
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c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
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} else {
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/* Have CPUID level 0 only - unheard of */
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c->x86 = 4;
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}
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c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xff;
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#ifdef CONFIG_SMP
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c->phys_proc_id = c->initial_apicid;
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#endif
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/* AMD-defined flags: level 0x80000001 */
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xlvl = cpuid_eax(0x80000000);
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c->extended_cpuid_level = xlvl;
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if ((xlvl & 0xffff0000) == 0x80000000) {
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if (xlvl >= 0x80000001) {
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c->x86_capability[1] = cpuid_edx(0x80000001);
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c->x86_capability[6] = cpuid_ecx(0x80000001);
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}
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if (xlvl >= 0x80000004)
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get_model_name(c); /* Default name */
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}
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/* Transmeta-defined flags: level 0x80860001 */
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xlvl = cpuid_eax(0x80860000);
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if ((xlvl & 0xffff0000) == 0x80860000) {
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/* Don't set x86_cpuid_level here for now to not confuse. */
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if (xlvl >= 0x80860001)
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c->x86_capability[2] = cpuid_edx(0x80860001);
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}
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c->extended_cpuid_level = cpuid_eax(0x80000000);
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if (c->extended_cpuid_level >= 0x80000007)
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c->x86_power = cpuid_edx(0x80000007);
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if (c->x86_vendor != X86_VENDOR_UNKNOWN &&
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cpu_devs[c->x86_vendor]->c_early_init)
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cpu_devs[c->x86_vendor]->c_early_init(c);
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validate_pat_support(c);
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/* early_param could clear that, but recall get it set again */
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if (disable_apic)
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clear_cpu_cap(c, X86_FEATURE_APIC);
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}
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/*
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* This does the hard work of actually picking apart the CPU stuff...
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*/
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void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
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{
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int i;
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early_identify_cpu(c);
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init_scattered_cpuid_features(c);
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c->apicid = phys_pkg_id(0);
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/*
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* Vendor-specific initialization. In this section we
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* canonicalize the feature flags, meaning if there are
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* features a certain CPU supports which CPUID doesn't
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* tell us, CPUID claiming incorrect flags, or other bugs,
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* we handle them here.
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*
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* At the end of this section, c->x86_capability better
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* indicate the features this CPU genuinely supports!
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*/
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if (this_cpu->c_init)
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this_cpu->c_init(c);
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detect_ht(c);
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/*
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* On SMP, boot_cpu_data holds the common feature set between
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* all CPUs; so make sure that we indicate which features are
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* common between the CPUs. The first time this routine gets
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* executed, c == &boot_cpu_data.
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*/
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if (c != &boot_cpu_data) {
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/* AND the already accumulated flags with these */
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for (i = 0; i < NCAPINTS; i++)
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boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
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}
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/* Clear all flags overriden by options */
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for (i = 0; i < NCAPINTS; i++)
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c->x86_capability[i] &= ~cleared_cpu_caps[i];
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#ifdef CONFIG_X86_MCE
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mcheck_init(c);
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#endif
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select_idle_routine(c);
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#ifdef CONFIG_NUMA
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numa_add_cpu(smp_processor_id());
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#endif
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}
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void __cpuinit identify_boot_cpu(void)
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{
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identify_cpu(&boot_cpu_data);
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}
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void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
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{
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BUG_ON(c == &boot_cpu_data);
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identify_cpu(c);
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mtrr_ap_init();
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}
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static __init int setup_noclflush(char *arg)
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{
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setup_clear_cpu_cap(X86_FEATURE_CLFLSH);
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return 1;
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}
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__setup("noclflush", setup_noclflush);
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void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
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{
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if (c->x86_model_id[0])
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printk(KERN_CONT "%s", c->x86_model_id);
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if (c->x86_mask || c->cpuid_level >= 0)
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printk(KERN_CONT " stepping %02x\n", c->x86_mask);
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else
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printk(KERN_CONT "\n");
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}
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static __init int setup_disablecpuid(char *arg)
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{
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int bit;
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if (get_option(&arg, &bit) && bit < NCAPINTS*32)
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setup_clear_cpu_cap(bit);
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else
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return 0;
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return 1;
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}
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__setup("clearcpuid=", setup_disablecpuid);
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@ -1,823 +0,0 @@
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/*
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* Copyright (C) 1995 Linus Torvalds
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*/
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/*
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* This file handles the architecture-dependent parts of initialization
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*/
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/stddef.h>
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#include <linux/unistd.h>
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#include <linux/ptrace.h>
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#include <linux/slab.h>
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#include <linux/user.h>
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#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 <asm/pci-direct.h>
|
||||
#include <linux/efi.h>
|
||||
#include <linux/acpi.h>
|
||||
#include <linux/kallsyms.h>
|
||||
#include <linux/edd.h>
|
||||
#include <linux/iscsi_ibft.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 <linux/sort.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include <linux/init_ohci1394_dma.h>
|
||||
#include <linux/kvm_para.h>
|
||||
|
||||
#include <asm/mtrr.h>
|
||||
#include <asm/uaccess.h>
|
||||
#include <asm/system.h>
|
||||
#include <asm/vsyscall.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/mpspec.h>
|
||||
#include <asm/dma.h>
|
||||
#include <asm/gart.h>
|
||||
#include <asm/mpspec.h>
|
||||
#include <asm/mmu_context.h>
|
||||
#include <asm/proto.h>
|
||||
#include <asm/setup.h>
|
||||
#include <asm/numa.h>
|
||||
#include <asm/sections.h>
|
||||
#include <asm/dmi.h>
|
||||
#include <asm/cacheflush.h>
|
||||
#include <asm/mce.h>
|
||||
#include <asm/ds.h>
|
||||
#include <asm/topology.h>
|
||||
#include <asm/trampoline.h>
|
||||
#include <asm/pat.h>
|
||||
|
||||
#include <mach_apic.h>
|
||||
#ifdef CONFIG_PARAVIRT
|
||||
#include <asm/paravirt.h>
|
||||
#else
|
||||
#define ARCH_SETUP
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Machine setup..
|
||||
*/
|
||||
|
||||
struct cpuinfo_x86 boot_cpu_data __read_mostly;
|
||||
EXPORT_SYMBOL(boot_cpu_data);
|
||||
|
||||
__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
|
||||
|
||||
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;
|
||||
|
||||
/*
|
||||
* 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;
|
||||
|
||||
static char __initdata command_line[COMMAND_LINE_SIZE];
|
||||
|
||||
static 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 = 0x60,
|
||||
.flags = IORESOURCE_BUSY | IORESOURCE_IO },
|
||||
{ .name = "keyboard", .start = 0x64, .end = 0x64,
|
||||
.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)
|
||||
|
||||
static struct resource data_resource = {
|
||||
.name = "Kernel data",
|
||||
.start = 0,
|
||||
.end = 0,
|
||||
.flags = IORESOURCE_RAM,
|
||||
};
|
||||
static struct resource code_resource = {
|
||||
.name = "Kernel code",
|
||||
.start = 0,
|
||||
.end = 0,
|
||||
.flags = IORESOURCE_RAM,
|
||||
};
|
||||
static struct resource bss_resource = {
|
||||
.name = "Kernel bss",
|
||||
.start = 0,
|
||||
.end = 0,
|
||||
.flags = IORESOURCE_RAM,
|
||||
};
|
||||
|
||||
static void __init early_cpu_init(void);
|
||||
static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c);
|
||||
|
||||
#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,
|
||||
PAGE_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);
|
||||
early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT);
|
||||
reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
|
||||
}
|
||||
#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, boot_params.edd_mbr_sig_buffer,
|
||||
sizeof(edd.mbr_signature));
|
||||
memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
|
||||
edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
|
||||
edd.edd_info_nr = boot_params.eddbuf_entries;
|
||||
}
|
||||
#else
|
||||
static inline void copy_edd(void)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Overridden in paravirt.c if CONFIG_PARAVIRT */
|
||||
void __attribute__((weak)) __init memory_setup(void)
|
||||
{
|
||||
machine_specific_memory_setup();
|
||||
}
|
||||
|
||||
/* Current gdt points %fs at the "master" per-cpu area: after this,
|
||||
* it's on the real one. */
|
||||
void switch_to_new_gdt(void)
|
||||
{
|
||||
struct desc_ptr gdt_descr;
|
||||
|
||||
gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id());
|
||||
gdt_descr.size = GDT_SIZE - 1;
|
||||
load_gdt(&gdt_descr);
|
||||
}
|
||||
|
||||
/*
|
||||
* setup_arch - architecture-specific boot-time initializations
|
||||
*
|
||||
* Note: On x86_64, fixmaps are ready for use even before this is called.
|
||||
*/
|
||||
void __init setup_arch(char **cmdline_p)
|
||||
{
|
||||
unsigned i;
|
||||
|
||||
printk(KERN_INFO "Command line: %s\n", boot_command_line);
|
||||
|
||||
ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
|
||||
screen_info = boot_params.screen_info;
|
||||
edid_info = boot_params.edid_info;
|
||||
saved_video_mode = boot_params.hdr.vid_mode;
|
||||
bootloader_type = boot_params.hdr.type_of_loader;
|
||||
|
||||
#ifdef CONFIG_BLK_DEV_RAM
|
||||
rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
|
||||
rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
|
||||
rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
|
||||
#endif
|
||||
#ifdef CONFIG_EFI
|
||||
if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
|
||||
"EL64", 4)) {
|
||||
efi_enabled = 1;
|
||||
efi_reserve_early();
|
||||
}
|
||||
#endif
|
||||
|
||||
ARCH_SETUP
|
||||
|
||||
setup_memory_map();
|
||||
copy_edd();
|
||||
|
||||
if (!boot_params.hdr.root_flags)
|
||||
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;
|
||||
bss_resource.start = virt_to_phys(&__bss_start);
|
||||
bss_resource.end = virt_to_phys(&__bss_stop)-1;
|
||||
|
||||
early_cpu_init();
|
||||
early_identify_cpu(&boot_cpu_data);
|
||||
|
||||
strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
|
||||
*cmdline_p = command_line;
|
||||
|
||||
parse_setup_data();
|
||||
|
||||
parse_early_param();
|
||||
|
||||
if (acpi_mps_check()) {
|
||||
disable_apic = 1;
|
||||
clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
|
||||
if (init_ohci1394_dma_early)
|
||||
init_ohci1394_dma_on_all_controllers();
|
||||
#endif
|
||||
|
||||
finish_e820_parsing();
|
||||
|
||||
/* after parse_early_param, so could debug it */
|
||||
insert_resource(&iomem_resource, &code_resource);
|
||||
insert_resource(&iomem_resource, &data_resource);
|
||||
insert_resource(&iomem_resource, &bss_resource);
|
||||
|
||||
early_gart_iommu_check();
|
||||
|
||||
e820_register_active_regions(0, 0, -1UL);
|
||||
/*
|
||||
* partially used pages are not usable - thus
|
||||
* we are rounding upwards:
|
||||
*/
|
||||
end_pfn = e820_end_of_ram();
|
||||
|
||||
/* pre allocte 4k for mptable mpc */
|
||||
early_reserve_e820_mpc_new();
|
||||
/* update e820 for memory not covered by WB MTRRs */
|
||||
mtrr_bp_init();
|
||||
if (mtrr_trim_uncached_memory(end_pfn)) {
|
||||
remove_all_active_ranges();
|
||||
e820_register_active_regions(0, 0, -1UL);
|
||||
end_pfn = e820_end_of_ram();
|
||||
}
|
||||
|
||||
num_physpages = end_pfn;
|
||||
|
||||
check_efer();
|
||||
|
||||
max_pfn_mapped = init_memory_mapping(0, (end_pfn << PAGE_SHIFT));
|
||||
if (efi_enabled)
|
||||
efi_init();
|
||||
|
||||
vsmp_init();
|
||||
|
||||
dmi_scan_machine();
|
||||
|
||||
io_delay_init();
|
||||
|
||||
#ifdef CONFIG_KVM_CLOCK
|
||||
kvmclock_init();
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Initialize the ACPI boot-time table parser (gets the RSDP and SDT).
|
||||
* Call this early for SRAT node setup.
|
||||
*/
|
||||
acpi_boot_table_init();
|
||||
|
||||
/* 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
|
||||
|
||||
dma32_reserve_bootmem();
|
||||
|
||||
#ifdef CONFIG_ACPI_SLEEP
|
||||
/*
|
||||
* Reserve low memory region for sleep support.
|
||||
*/
|
||||
acpi_reserve_bootmem();
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_X86_MPPARSE
|
||||
/*
|
||||
* Find and reserve possible boot-time SMP configuration:
|
||||
*/
|
||||
find_smp_config();
|
||||
#endif
|
||||
#ifdef CONFIG_BLK_DEV_INITRD
|
||||
if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
|
||||
unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
|
||||
unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
|
||||
unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
|
||||
unsigned long end_of_mem = end_pfn << PAGE_SHIFT;
|
||||
|
||||
if (ramdisk_end <= end_of_mem) {
|
||||
/*
|
||||
* don't need to reserve again, already reserved early
|
||||
* in x86_64_start_kernel, and early_res_to_bootmem
|
||||
* convert that to reserved in bootmem
|
||||
*/
|
||||
initrd_start = ramdisk_image + PAGE_OFFSET;
|
||||
initrd_end = initrd_start+ramdisk_size;
|
||||
} else {
|
||||
free_bootmem(ramdisk_image, ramdisk_size);
|
||||
printk(KERN_ERR "initrd extends beyond end of memory "
|
||||
"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
|
||||
ramdisk_end, end_of_mem);
|
||||
initrd_start = 0;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
reserve_crashkernel();
|
||||
|
||||
reserve_ibft_region();
|
||||
|
||||
paging_init();
|
||||
map_vsyscall();
|
||||
|
||||
early_quirks();
|
||||
|
||||
/*
|
||||
* Read APIC and some other early information from ACPI tables.
|
||||
*/
|
||||
acpi_boot_init();
|
||||
|
||||
init_cpu_to_node();
|
||||
|
||||
#ifdef CONFIG_X86_MPPARSE
|
||||
/*
|
||||
* get boot-time SMP configuration:
|
||||
*/
|
||||
if (smp_found_config)
|
||||
get_smp_config();
|
||||
#endif
|
||||
init_apic_mappings();
|
||||
ioapic_init_mappings();
|
||||
|
||||
kvm_guest_init();
|
||||
|
||||
/*
|
||||
* We trust e820 completely. No explicit ROM probing in memory.
|
||||
*/
|
||||
e820_reserve_resources();
|
||||
e820_mark_nosave_regions(end_pfn);
|
||||
|
||||
/* 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)
|
||||
if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
|
||||
conswitchp = &vga_con;
|
||||
#elif defined(CONFIG_DUMMY_CONSOLE)
|
||||
conswitchp = &dummy_con;
|
||||
#endif
|
||||
#endif
|
||||
}
|
||||
|
||||
struct cpu_dev *cpu_devs[X86_VENDOR_NUM] = {};
|
||||
|
||||
static void __cpuinit default_init(struct cpuinfo_x86 *c)
|
||||
{
|
||||
display_cacheinfo(c);
|
||||
}
|
||||
|
||||
static struct cpu_dev __cpuinitdata default_cpu = {
|
||||
.c_init = default_init,
|
||||
.c_vendor = "Unknown",
|
||||
};
|
||||
static struct cpu_dev *this_cpu __cpuinitdata = &default_cpu;
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
|
||||
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 >= 0x80000008) {
|
||||
cpuid(0x80000008, &eax, &dummy, &dummy, &dummy);
|
||||
c->x86_virt_bits = (eax >> 8) & 0xff;
|
||||
c->x86_phys_bits = eax & 0xff;
|
||||
}
|
||||
}
|
||||
|
||||
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 "
|
||||
"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
|
||||
}
|
||||
|
||||
static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
|
||||
{
|
||||
char *v = c->x86_vendor_id;
|
||||
int i;
|
||||
static int printed;
|
||||
|
||||
for (i = 0; i < X86_VENDOR_NUM; i++) {
|
||||
if (cpu_devs[i]) {
|
||||
if (!strcmp(v, cpu_devs[i]->c_ident[0]) ||
|
||||
(cpu_devs[i]->c_ident[1] &&
|
||||
!strcmp(v, cpu_devs[i]->c_ident[1]))) {
|
||||
c->x86_vendor = i;
|
||||
this_cpu = cpu_devs[i];
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (!printed) {
|
||||
printed++;
|
||||
printk(KERN_ERR "CPU: Vendor unknown, using generic init.\n");
|
||||
printk(KERN_ERR "CPU: Your system may be unstable.\n");
|
||||
}
|
||||
c->x86_vendor = X86_VENDOR_UNKNOWN;
|
||||
}
|
||||
|
||||
static void __init early_cpu_support_print(void)
|
||||
{
|
||||
int i,j;
|
||||
struct cpu_dev *cpu_devx;
|
||||
|
||||
printk("KERNEL supported cpus:\n");
|
||||
for (i = 0; i < X86_VENDOR_NUM; i++) {
|
||||
cpu_devx = cpu_devs[i];
|
||||
if (!cpu_devx)
|
||||
continue;
|
||||
for (j = 0; j < 2; j++) {
|
||||
if (!cpu_devx->c_ident[j])
|
||||
continue;
|
||||
printk(" %s %s\n", cpu_devx->c_vendor,
|
||||
cpu_devx->c_ident[j]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void __init early_cpu_init(void)
|
||||
{
|
||||
struct cpu_vendor_dev *cvdev;
|
||||
|
||||
for (cvdev = __x86cpuvendor_start ;
|
||||
cvdev < __x86cpuvendor_end ;
|
||||
cvdev++)
|
||||
cpu_devs[cvdev->vendor] = cvdev->cpu_dev;
|
||||
early_cpu_support_print();
|
||||
}
|
||||
|
||||
/* 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. */
|
||||
static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
|
||||
{
|
||||
u32 tfms, xlvl;
|
||||
|
||||
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->x86_coreid_bits = 0;
|
||||
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 (test_cpu_cap(c, X86_FEATURE_CLFLSH))
|
||||
c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
|
||||
} else {
|
||||
/* Have CPUID level 0 only - unheard of */
|
||||
c->x86 = 4;
|
||||
}
|
||||
|
||||
c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xff;
|
||||
#ifdef CONFIG_SMP
|
||||
c->phys_proc_id = c->initial_apicid;
|
||||
#endif
|
||||
/* 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);
|
||||
}
|
||||
|
||||
c->extended_cpuid_level = cpuid_eax(0x80000000);
|
||||
if (c->extended_cpuid_level >= 0x80000007)
|
||||
c->x86_power = cpuid_edx(0x80000007);
|
||||
|
||||
if (c->x86_vendor != X86_VENDOR_UNKNOWN &&
|
||||
cpu_devs[c->x86_vendor]->c_early_init)
|
||||
cpu_devs[c->x86_vendor]->c_early_init(c);
|
||||
|
||||
validate_pat_support(c);
|
||||
|
||||
/* early_param could clear that, but recall get it set again */
|
||||
if (disable_apic)
|
||||
clear_cpu_cap(c, X86_FEATURE_APIC);
|
||||
}
|
||||
|
||||
/*
|
||||
* This does the hard work of actually picking apart the CPU stuff...
|
||||
*/
|
||||
void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
|
||||
{
|
||||
int i;
|
||||
|
||||
early_identify_cpu(c);
|
||||
|
||||
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!
|
||||
*/
|
||||
if (this_cpu->c_init)
|
||||
this_cpu->c_init(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];
|
||||
}
|
||||
|
||||
/* Clear all flags overriden by options */
|
||||
for (i = 0; i < NCAPINTS; i++)
|
||||
c->x86_capability[i] &= ~cleared_cpu_caps[i];
|
||||
|
||||
#ifdef CONFIG_X86_MCE
|
||||
mcheck_init(c);
|
||||
#endif
|
||||
select_idle_routine(c);
|
||||
|
||||
#ifdef CONFIG_NUMA
|
||||
numa_add_cpu(smp_processor_id());
|
||||
#endif
|
||||
|
||||
}
|
||||
|
||||
void __cpuinit identify_boot_cpu(void)
|
||||
{
|
||||
identify_cpu(&boot_cpu_data);
|
||||
}
|
||||
|
||||
void __cpuinit identify_secondary_cpu(struct cpuinfo_x86 *c)
|
||||
{
|
||||
BUG_ON(c == &boot_cpu_data);
|
||||
identify_cpu(c);
|
||||
mtrr_ap_init();
|
||||
}
|
||||
|
||||
static __init int setup_noclflush(char *arg)
|
||||
{
|
||||
setup_clear_cpu_cap(X86_FEATURE_CLFLSH);
|
||||
return 1;
|
||||
}
|
||||
__setup("noclflush", setup_noclflush);
|
||||
|
||||
void __cpuinit print_cpu_info(struct cpuinfo_x86 *c)
|
||||
{
|
||||
if (c->x86_model_id[0])
|
||||
printk(KERN_CONT "%s", c->x86_model_id);
|
||||
|
||||
if (c->x86_mask || c->cpuid_level >= 0)
|
||||
printk(KERN_CONT " stepping %02x\n", c->x86_mask);
|
||||
else
|
||||
printk(KERN_CONT "\n");
|
||||
}
|
||||
|
||||
static __init int setup_disablecpuid(char *arg)
|
||||
{
|
||||
int bit;
|
||||
if (get_option(&arg, &bit) && bit < NCAPINTS*32)
|
||||
setup_clear_cpu_cap(bit);
|
||||
else
|
||||
return 0;
|
||||
return 1;
|
||||
}
|
||||
__setup("clearcpuid=", setup_disablecpuid);
|
||||
|
|
@ -153,6 +153,7 @@ static inline int hlt_works(int cpu)
|
|||
|
||||
extern void cpu_detect(struct cpuinfo_x86 *c);
|
||||
|
||||
extern void early_cpu_init(void);
|
||||
extern void identify_cpu(struct cpuinfo_x86 *);
|
||||
extern void identify_boot_cpu(void);
|
||||
extern void identify_secondary_cpu(struct cpuinfo_x86 *);
|
||||
|
|
|
|||
Loading…
Reference in a new issue