support stm8

1. see: TencentOS-tiny\board\STM8L052R8T6\IAR\hello_world
2. compile/debug/run with IAR for STM8

kernel/core/include/tos_compiler.h

@@ -21,8 +21,8 @@
 // function with __API__ prefix, api for user
 #define __API__
 
-// function with __KERNEL__ prefix, only for kernel
-#define __KERNEL__
+// function with __KNL__ prefix, only for kernel
+#define __KNL__
 
 // function with __HOOK__ prefix, should be implemented by user
 #define __HOOK__
@@ -80,6 +80,7 @@
 #define __NO_RETURN__       __attribute__((__noreturn__))
 #define __NAKED__           __attribute__((naked))
 #define __WEAK__            __attribute__((weak))
+
 /*------------------ ICC Compiler ----------------------*/
 #elif defined(__ICCARM__)  || defined(__ICC430__) // __IAR_SYSTEMS_ICC__
 
@@ -102,6 +103,27 @@
 #define __NAKED__
 #define __WEAK__            __weak
 
+/*------------------ ICC Compiler for STM8 ----------------------*/
+#elif defined(__IAR_SYSTEMS_ICC__)
+
+#define __ASM__             __asm
+#define __VOLATILE__        volatile
+
+#define __INLINE__          inline
+#define __STATIC__          static
+#define __STATIC_INLINE__   static inline
+
+#define likely(x)           (x)
+#define unlikely(x)         (x)
+#define __UNUSED__
+#define __USED__
+#define __PACKED__
+#define __ALIGNED__(x)
+#define __PURE__
+#define __CONST__
+#define __NO_RETURN__
+#define __NAKED__
+#define __WEAK__            __weak
 
 /*------------------ GNU Compiler ----------------------*/
 #elif defined(__GNUC__)