From 2ff467c05115c709decd7702cbc21679ac449519 Mon Sep 17 00:00:00 2001
From: Rob Herring <rob.herring@calxeda.com>
Date: Sun, 2 Dec 2012 17:06:21 +0000
Subject: [PATCH] ARM: add wfi assembly macro
Since wfi instruction is only available on ARMv7, add a conditional
macro for it.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
---
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 78ca8e0a6d..1918492eae 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;
--
2.39.5