X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=bertos%2Fcpu%2Fattr.h;h=832f0618698c724945f7196dfaf97e30cf790404;hb=32d1445272120a254d77ce8d1af1f527da7a2c17;hp=bd74d5c518647ef9ff1e87389e9706c42331cbea;hpb=d9a45d3c9ddc6ea69f44af9c584c475565313fe2;p=bertos.git

diff --git a/bertos/cpu/attr.h b/bertos/cpu/attr.h
index bd74d5c5..832f0618 100644
--- a/bertos/cpu/attr.h
+++ b/bertos/cpu/attr.h
@@ -42,6 +42,7 @@
 
 #include "detect.h"
 
+#include "cfg/cfg_proc.h"      /* CONFIG_KERN_PREEMPT */
 #include "cfg/cfg_attr.h"      /* CONFIG_FAST_MEM */
 
 
@@ -94,6 +95,8 @@
 
 	#ifdef __GNUC__
 		#define NOP         asm volatile ("nop")
+		/* This is a good thing to insert into busy-wait loops. */
+		#define PAUSE       asm volatile ("rep; nop" ::: "memory")
 		#define BREAKPOINT  asm volatile ("int3" ::)
 	#endif
 
@@ -104,7 +107,12 @@
 	#define CPU_HARVARD            0
 
 	/// Valid pointers should be >= than this value (used for debug)
-	#define CPU_RAM_START		0x200
+	#if CPU_ARM_AT91
+		#define CPU_RAM_START		0x00200000
+	#else
+		#warning Fix CPU_RAM_START address for your ARM, default value set to 0x200
+		#define CPU_RAM_START		0x200
+	#endif
 
 	#ifdef __IAR_SYSTEMS_ICC__
 		#warning Check CPU_BYTE_ORDER
@@ -148,10 +156,10 @@
 			#define FAST_FUNC /**/
 		#endif
 
-		/**
-		 * Function attribute to declare an interrupt service routine.
+		/*
+		 * Function attribute to move it into ram memory.
 		 */
-		#define ISR_FUNC __attribute__((interrupt))
+		#define RAM_FUNC __attribute__((section(".data")))
 
 	#endif /* !__IAR_SYSTEMS_ICC_ */
 
@@ -209,6 +217,7 @@
 	#else
 		#warning Fix CPU_RAM_START address for your AVR, default value set to 0x100
 		#define CPU_RAM_START       0x100
+	#endif
 
 #else
 	#error No CPU_... defined.
@@ -228,4 +237,9 @@
 	#define FAST_RODATA /* */
 #endif
 
+#ifndef PAUSE
+	/// Generic PAUSE implementation.
+	#define PAUSE	{NOP; MEMORY_BARRIER;}
+#endif
+
 #endif /* CPU_ATTR_H */