CM3: introduce PAUSE macro.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@3355 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/bertos/cpu/attr.h b/bertos/cpu/attr.h
index 8fdcb1c8fd2508554809df29b38fbf2158c7fc79..ad2945af0a792e33ccc8dd481c05cd5217b8270b 100644 (file)
--- a/bertos/cpu/attr.h
+++ b/bertos/cpu/attr.h
@@ -185,11 +185,12 @@
        #endif
 
        #define NOP         asm volatile ("nop")
+       #define PAUSE       asm volatile ("wfi" ::: "memory")
        #define BREAKPOINT  /* asm("bkpt 0") DOES NOT WORK */
 
        /*
-        * Builtin GCC memset() can be buggy! We need to redefine it here for
-        * this architecture. :(
+        * FIXME: builtin GCC memset() can be buggy! We need to redefine it
+        * here for this architecture. :(
         */
        #include <cfg/compiler.h>
        #define memset  __cm3_memset