Changeset 7c13c55 in mainline for kernel/arch/arm32/include/asm.h

Timestamp:

2012-03-11T19:28:29Z (12 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

096d4a6b

Parents:

46a808f5

Message:

arm32: Use WFE on armv7

File:

• kernel/arch/arm32/include/asm.h (modified) (1 diff)

kernel/arch/arm32/include/asm.h

@@ -43 +43 @@
 #include <trace.h>
 
-/** No such instruction on ARM to sleep CPU. */
+/** No such instruction on ARM to sleep CPU.
+ *
+ * ARMv7 introduced wait for event and wait for interrupt.
+ */
 NO_TRACE static inline void cpu_sleep(void)
 {
+#ifdef PROCESSOR_armv7
+        asm volatile (
+                "wfe"::
+        );
+#endif
 }