diff options
| author | Bin Meng | 2015-01-22 11:29:40 +0800 |
|---|---|---|
| committer | Simon Glass | 2015-01-23 17:24:55 -0700 |
| commit | 49491669065c1c718d8dc0b0ebc151b3d010c17b (patch) | |
| tree | a9bfa987044f9d6deb606f787855a9f77ad5e871 /arch | |
| parent | 566d1754d3a84819d9e2829421898d115ef2c116 (diff) | |
x86: Save mtrr support flag in global data
CPUID (EAX 01H) returns MTRR support flag in EDX bit 12. Probe this
flag in x86_cpu_init_f() and save it in global data.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/cpu/cpu.c | 7 | ||||
| -rw-r--r-- | arch/x86/include/asm/global_data.h | 13 |
2 files changed, 14 insertions, 6 deletions
diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c index 30e50696984..ed7905c1d7c 100644 --- a/arch/x86/cpu/cpu.c +++ b/arch/x86/cpu/cpu.c @@ -223,6 +223,11 @@ static bool has_cpuid(void) return flag_is_changeable_p(X86_EFLAGS_ID); } +static bool has_mtrr(void) +{ + return cpuid_edx(0x00000001) & (1 << 12) ? true : false; +} + static int build_vendor_name(char *vendor_name) { struct cpuid_result result; @@ -318,6 +323,8 @@ int x86_cpu_init_f(void) gd->arch.x86_model = c.x86_model; gd->arch.x86_mask = c.x86_mask; gd->arch.x86_device = cpu.device; + + gd->arch.has_mtrr = has_mtrr(); } return 0; diff --git a/arch/x86/include/asm/global_data.h b/arch/x86/include/asm/global_data.h index 24e305239b2..243ed5c4615 100644 --- a/arch/x86/include/asm/global_data.h +++ b/arch/x86/include/asm/global_data.h @@ -44,11 +44,11 @@ struct mtrr_request { /* Architecture-specific global data */ struct arch_global_data { - struct global_data *gd_addr; /* Location of Global Data */ - uint8_t x86; /* CPU family */ - uint8_t x86_vendor; /* CPU vendor */ - uint8_t x86_model; - uint8_t x86_mask; + struct global_data *gd_addr; /* Location of Global Data */ + uint8_t x86; /* CPU family */ + uint8_t x86_vendor; /* CPU vendor */ + uint8_t x86_model; + uint8_t x86_mask; uint32_t x86_device; uint64_t tsc_base; /* Initial value returned by rdtsc() */ uint32_t tsc_base_kclocks; /* Initial tsc as a kclocks value */ @@ -60,10 +60,11 @@ struct arch_global_data { const struct pch_gpio_map *gpio_map; /* board GPIO map */ struct memory_info meminfo; /* Memory information */ #ifdef CONFIG_HAVE_FSP - void *hob_list; /* FSP HOB list */ + void *hob_list; /* FSP HOB list */ #endif struct mtrr_request mtrr_req[MAX_MTRR_REQUESTS]; int mtrr_req_count; + int has_mtrr; }; #endif |