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| author | Simon Glass <sjg@chromium.org> | 2015-04-28 20:25:14 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-04-29 21:02:34 -0600 |
| commit | 837a136fc7cfb712858502a03c8d0ae91bea6e0d (patch) | |
| tree | fec5a7c0728192268577dd5719f550bf3dcf3a63 /arch/x86/include/asm/cpu.h | |
| parent | 1a06d2a3106f9de5a4b9bec68593593fcf930e3b (diff) | |
| download | u-boot-837a136fc7cfb712858502a03c8d0ae91bea6e0d.tar.gz | |
x86: Add an mfence macro
Provide access to this x86 instruction from C code.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch/x86/include/asm/cpu.h')
| -rw-r--r-- | arch/x86/include/asm/cpu.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h index c8392915f1..08284ee295 100644 --- a/arch/x86/include/asm/cpu.h +++ b/arch/x86/include/asm/cpu.h @@ -151,6 +151,11 @@ static inline int flag_is_changeable_p(uint32_t flag) return ((f1^f2) & flag) != 0; } +static inline void mfence(void) +{ + __asm__ __volatile__("mfence" : : : "memory"); +} + /** * cpu_enable_paging_pae() - Enable PAE-paging * |