added STACK_INITIAL_SIZE to control the number of initial stack pages; added BUILD_BUG_ON() macro to catch compile-time errors

git-svn-id: svn://anubis/hos/trunk@88 5b3e749e-e535-0410-8002-a9bb6afbdfca

kernel/include/hos_defines.h

@@ -4,10 +4,6 @@
 
 #include "hos_types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 #define KERNEL_OFFSET           0x00000000
 
 #define PAGE_LOG_SIZE           12
@@ -17,24 +13,31 @@ extern "C" {
 
 #define CONSOLE_MEMORY          0xB8000
 
-extern  u8_t    _code;
-extern  u8_t    _data;
-extern  u8_t    _bss;
-extern  u8_t    _end;
-
-#define KERNEL_CODE (&_code)
-#define KERNEL_DATA (&_data)
-#define KERNEL_BSS  (&_bss)
-#define KERNEL_END  (&_end)
+#define KERNEL_CODE             (&_code)
+#define KERNEL_DATA             (&_data)
+#define KERNEL_BSS              (&_bss)
+#define KERNEL_END              (&_end)
 
 #define KERNEL_PHYSICAL_ADDRESS ((u32_t)(KERNEL_CODE - KERNEL_OFFSET))
 #define KERNEL_VIRTUAL_ADDRESS  ((u32_t)KERNEL_CODE)
 #define KERNEL_SIZE             ((u32_t)(KERNEL_END - KERNEL_CODE))
 
-#define KERNEL_STACK_TOP        0x40000000
+#define KERNEL_STACK_TOP        0x20000000
 
 #define KERNEL_TIMER_FREQ       1000
 
+#define BUILD_BUG_ON(condition) \
+    ((void) sizeof(struct { int : -!!(condition); }))
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern  u8_t    _code;
+extern  u8_t    _data;
+extern  u8_t    _bss;
+extern  u8_t    _end;
+
 #ifdef __cplusplus
 }
 #endif