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| author | Bin Meng <bmeng.cn@gmail.com> | 2015-01-22 11:29:40 +0800 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-01-23 17:24:55 -0700 |
| commit | 49491669065c1c718d8dc0b0ebc151b3d010c17b (patch) | |
| tree | a9bfa987044f9d6deb606f787855a9f77ad5e871 /arch/x86/cpu | |
| parent | 566d1754d3a84819d9e2829421898d115ef2c116 (diff) | |
| download | u-boot-imx-49491669065c1c718d8dc0b0ebc151b3d010c17b.zip u-boot-imx-49491669065c1c718d8dc0b0ebc151b3d010c17b.tar.gz u-boot-imx-49491669065c1c718d8dc0b0ebc151b3d010c17b.tar.bz2 | |
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/x86/cpu')
| -rw-r--r-- | arch/x86/cpu/cpu.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c index 30e5069..ed7905c 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; |