Changes in kernel/arch/arm32/include/asm.h [7a0359b:ea106a6] in mainline

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 old ARM to sleep CPU.
+ *
+ * ARMv7 introduced wait for event and wait for interrupt (wfe/wfi).
+ */
 NO_TRACE static inline void cpu_sleep(void)
 {
+#ifdef PROCESSOR_armv7
+        asm volatile ( "wfe" :: );
+#endif
 }