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authorCatalin Marinas <catalin.marinas@arm.com>2007-05-08 22:53:44 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-05-08 22:55:57 +0100
commit56163fcf194fb688fcf3cefa9b90c5ad41f74059 (patch)
tree35b26ce5d0c40fa153ea87610987983f12642a67 /include/asm-arm
parentaaf83acba9fb1f93d2e656c7e4dda4e38c1cb490 (diff)
[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 <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/asm-arm')
-rw-r--r--include/asm-arm/system.h6
1 files changed, 5 insertions, 1 deletions
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" \