aboutsummaryrefslogtreecommitdiff
path: root/arch/x86/kernel/cpu/common.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/cpu/common.c')
-rw-r--r--arch/x86/kernel/cpu/common.c138
1 files changed, 53 insertions, 85 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 8aab8517642..96e1b8698d3 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -96,7 +96,7 @@ int __cpuinit get_model_name(struct cpuinfo_x86 *c)
unsigned int *v;
char *p, *q;
- if (cpuid_eax(0x80000000) < 0x80000004)
+ if (c->extended_cpuid_level < 0x80000004)
return 0;
v = (unsigned int *) c->x86_model_id;
@@ -125,7 +125,7 @@ void __cpuinit display_cacheinfo(struct cpuinfo_x86 *c)
{
unsigned int n, dummy, ecx, edx, l2size;
- n = cpuid_eax(0x80000000);
+ n = c->extended_cpuid_level;
if (n >= 0x80000005) {
cpuid(0x80000005, &dummy, &dummy, &ecx, &edx);
@@ -186,7 +186,7 @@ static char __cpuinit *table_lookup_model(struct cpuinfo_x86 *c)
}
-static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c, int early)
+static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c)
{
char *v = c->x86_vendor_id;
int i;
@@ -198,8 +198,7 @@ static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c, int early)
(cpu_devs[i]->c_ident[1] &&
!strcmp(v, cpu_devs[i]->c_ident[1]))) {
c->x86_vendor = i;
- if (!early)
- this_cpu = cpu_devs[i];
+ this_cpu = cpu_devs[i];
return;
}
}
@@ -284,34 +283,30 @@ void __init cpu_detect(struct cpuinfo_x86 *c)
}
}
}
-static void __cpuinit early_get_cap(struct cpuinfo_x86 *c)
+
+static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
{
u32 tfms, xlvl;
- unsigned int ebx;
+ u32 ebx;
- memset(&c->x86_capability, 0, sizeof c->x86_capability);
- if (have_cpuid_p()) {
- /* Intel-defined flags: level 0x00000001 */
- if (c->cpuid_level >= 0x00000001) {
- u32 capability, excap;
- cpuid(0x00000001, &tfms, &ebx, &excap, &capability);
- c->x86_capability[0] = capability;
- c->x86_capability[4] = excap;
- }
+ /* Intel-defined flags: level 0x00000001 */
+ if (c->cpuid_level >= 0x00000001) {
+ u32 capability, excap;
+ cpuid(0x00000001, &tfms, &ebx, &excap, &capability);
+ c->x86_capability[0] = capability;
+ c->x86_capability[4] = excap;
+ }
- /* AMD-defined flags: level 0x80000001 */
- xlvl = cpuid_eax(0x80000000);
- if ((xlvl & 0xffff0000) == 0x80000000) {
- if (xlvl >= 0x80000001) {
- c->x86_capability[1] = cpuid_edx(0x80000001);
- c->x86_capability[6] = cpuid_ecx(0x80000001);
- }
+ /* 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);
}
-
}
-
}
-
/*
* Do minimum CPU detection early.
* Fields really needed: vendor, cpuid_level, family, model, mask,
@@ -321,25 +316,29 @@ static void __cpuinit early_get_cap(struct cpuinfo_x86 *c)
* WARNING: this function is only called on the BP. Don't add code here
* that is supposed to run on all CPUs.
*/
-static void __init early_cpu_detect(void)
+static void __init early_identify_cpu(struct cpuinfo_x86 *c)
{
- struct cpuinfo_x86 *c = &boot_cpu_data;
-
c->x86_cache_alignment = 32;
c->x86_clflush_size = 32;
if (!have_cpuid_p())
return;
+ c->extended_cpuid_level = 0;
+
+ memset(&c->x86_capability, 0, sizeof c->x86_capability);
+
cpu_detect(c);
- get_cpu_vendor(c, 1);
+ get_cpu_vendor(c);
- early_get_cap(c);
+ get_cpu_cap(c);
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);
}
/*
@@ -373,60 +372,32 @@ static void __cpuinit detect_nopl(struct cpuinfo_x86 *c)
static void __cpuinit generic_identify(struct cpuinfo_x86 *c)
{
- u32 tfms, xlvl;
- unsigned int ebx;
-
- if (have_cpuid_p()) {
- /* 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, 0);
- /* 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 capability, excap;
- cpuid(0x00000001, &tfms, &ebx, &excap, &capability);
- c->x86_capability[0] = capability;
- c->x86_capability[4] = excap;
- c->x86 = (tfms >> 8) & 15;
- c->x86_model = (tfms >> 4) & 15;
- if (c->x86 == 0xf)
- c->x86 += (tfms >> 20) & 0xff;
- if (c->x86 >= 0x6)
- c->x86_model += ((tfms >> 16) & 0xF) << 4;
- c->x86_mask = tfms & 15;
- c->initial_apicid = (ebx >> 24) & 0xFF;
+ if (!have_cpuid_p())
+ return;
+
+ c->extended_cpuid_level = 0;
+
+ cpu_detect(c);
+
+ get_cpu_vendor(c);
+
+ get_cpu_cap(c);
+
+ if (c->cpuid_level >= 0x00000001) {
+ c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xFF;
#ifdef CONFIG_X86_HT
- c->apicid = phys_pkg_id(c->initial_apicid, 0);
- c->phys_proc_id = c->initial_apicid;
+ c->apicid = phys_pkg_id(c->initial_apicid, 0);
+ c->phys_proc_id = c->initial_apicid;
#else
- c->apicid = c->initial_apicid;
+ c->apicid = c->initial_apicid;
#endif
- if (test_cpu_cap(c, X86_FEATURE_CLFLSH))
- c->x86_clflush_size = ((ebx >> 8) & 0xff) * 8;
- } else {
- /* Have CPUID level 0 only - unheard of */
- c->x86 = 4;
- }
+ }
- /* AMD-defined flags: level 0x80000001 */
- xlvl = cpuid_eax(0x80000000);
- 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 */
- }
+ if (c->extended_cpuid_level >= 0x80000004)
+ get_model_name(c); /* Default name */
- init_scattered_cpuid_features(c);
- detect_nopl(c);
- }
+ init_scattered_cpuid_features(c);
+ detect_nopl(c);
}
static void __cpuinit squash_the_stupid_serial_number(struct cpuinfo_x86 *c)
@@ -651,13 +622,10 @@ void __init early_cpu_init(void)
{
struct cpu_vendor_dev *cvdev;
- for (cvdev = __x86cpuvendor_start ;
- cvdev < __x86cpuvendor_end ;
- cvdev++)
+ for (cvdev = __x86cpuvendor_start; cvdev < __x86cpuvendor_end; cvdev++)
cpu_devs[cvdev->vendor] = cvdev->cpu_dev;
- early_cpu_detect();
- validate_pat_support(&boot_cpu_data);
+ early_identify_cpu(&boot_cpu_data);
}
/* Make sure %fs is initialized properly in idle threads */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-12 10:26:16 +0000