[U-Boot] [RFC PATCH v2 07/28] ppc: Add initial memory barrier macros

These are available on other architectures, so add them on ppc.

Signed-off-by: Simon Glass sjg@chromium.org ---

arch/powerpc/include/asm/io.h | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h index 56ac9fe..d246fd8 100644 --- a/arch/powerpc/include/asm/io.h +++ b/arch/powerpc/include/asm/io.h @@ -318,4 +318,12 @@ static inline phys_addr_t virt_to_phys(void * vaddr) #endif }

+/* + * TODO: The kernel offers some more advanced versions of barriers, it might + * have some advantages to use them instead of the simple one here. + */ +#define dmb() __asm__ __volatile__ ("" : : : "memory") +#define __iormb() dmb() +#define __iowmb() dmb() + #endif