From 56163fcf194fb688fcf3cefa9b90c5ad41f74059 Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Tue, 8 May 2007 22:53:44 +0100 Subject: [ARM] armv7: add dedicated ARMv7 barrier instructions Starting with ARMv7, there are dedicated instruction for the ISB, DSB and DMB barriers and there is no need to execute them as CP15 operations. Signed-off-by: Catalin Marinas Signed-off-by: Russell King --- include/asm-arm/system.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/asm-arm/system.h b/include/asm-arm/system.h index c57555c3709..41dd49151da 100644 --- a/include/asm-arm/system.h +++ b/include/asm-arm/system.h @@ -158,7 +158,11 @@ extern unsigned int user_debug; #define vectors_high() (0) #endif -#if defined(CONFIG_CPU_XSC3) || __LINUX_ARM_ARCH__ >= 6 +#if __LINUX_ARM_ARCH__ >= 7 +#define isb() __asm__ __volatile__ ("isb" : : : "memory") +#define dsb() __asm__ __volatile__ ("dsb" : : : "memory") +#define dmb() __asm__ __volatile__ ("dmb" : : : "memory") +#elif defined(CONFIG_CPU_XSC3) || __LINUX_ARM_ARCH__ == 6 #define isb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c5, 4" \ : : "r" (0) : "memory") #define dsb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 4" \ -- cgit v1.2.3