From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rob Herring Date: Sun, 2 Dec 2012 21:06:21 -0600 Subject: [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro Message-ID: <1354503982-1124-1-git-send-email-robherring2@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de From: Rob Herring Since wfi instruction is only available on ARMv7, add a conditional macro for it. Signed-off-by: Rob Herring --- arch/arm/include/asm/system.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h index 2b28a26..2f6aecd 100644 --- a/arch/arm/include/asm/system.h +++ b/arch/arm/include/asm/system.h @@ -61,6 +61,12 @@ #define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t"); +#ifdef __ARM_ARCH_7A__ +#define wfi() __asm__ __volatile__ ("wfi" : : : "memory") +#else +#define wfi() +#endif + static inline unsigned int get_cr(void) { unsigned int val; -- 1.7.10.4