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| author | Simon Glass <sjg@chromium.org> | 2015-08-04 12:33:54 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-08-05 08:44:07 -0600 |
| commit | 7dfe8bdeef7f8a7223fb39e04faaa5c7489feb3f (patch) | |
| tree | 8f932320d7cc091e8642742fc4e77661a8cb4bbd /arch | |
| parent | b997abd3f06f136b226431a2947520dd5a426869 (diff) | |
| download | u-boot-imx-7dfe8bdeef7f8a7223fb39e04faaa5c7489feb3f.zip u-boot-imx-7dfe8bdeef7f8a7223fb39e04faaa5c7489feb3f.tar.gz u-boot-imx-7dfe8bdeef7f8a7223fb39e04faaa5c7489feb3f.tar.bz2 | |
x86: Add an enum for some commonly-used GDT bits
Rather than add these as open-coded values, create an enum with the commonly
used flags.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/cpu.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h index 08284ee..5b89139 100644 --- a/arch/x86/include/asm/cpu.h +++ b/arch/x86/include/asm/cpu.h @@ -27,6 +27,24 @@ enum { X86_VENDOR_UNKNOWN = 0xff }; +/* Global descriptor table (GDT) bits */ +enum { + GDT_4KB = 1ULL << 55, + GDT_32BIT = 1ULL << 54, + GDT_LONG = 1ULL << 53, + GDT_PRESENT = 1ULL << 47, + GDT_NOTSYS = 1ULL << 44, + GDT_CODE = 1ULL << 43, + GDT_LIMIT_LOW_SHIFT = 0, + GDT_LIMIT_LOW_MASK = 0xffff, + GDT_LIMIT_HIGH_SHIFT = 48, + GDT_LIMIT_HIGH_MASK = 0xf, + GDT_BASE_LOW_SHIFT = 16, + GDT_BASE_LOW_MASK = 0xffff, + GDT_BASE_HIGH_SHIFT = 56, + GDT_BASE_HIGH_MASK = 0xf, +}; + struct cpuid_result { uint32_t eax; uint32_t ebx; |