On Wed, Apr 29, 2015 at 10:25 AM, Simon Glass <s...@chromium.org> wrote: > Provide access to this x86 instruction from C code. > > Signed-off-by: Simon Glass <s...@chromium.org> > --- > > Changes in v2: > - Remove unnecessary \t\n after mfence assembler instruction > > arch/x86/include/asm/cpu.h | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h > index c839291..08284ee 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 > * > --
Reviewed-by: Bin Meng <bmeng...@gmail.com> _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot