Merge contributed patch to extend support of atxmega.

[bertos.git] / bertos / cpu / attr.h

diff --git a/bertos/cpu/attr.h b/bertos/cpu/attr.h
index 98ed7b2fe6b24cc562a83a63129d1386aa8b2f58..331f26dff0c372d7290a7e9862b9651ac36dfafc 100644 (file)
--- 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
 
@@ -106,6 +109,8 @@
        /// Valid pointers should be >= than this value (used for debug)
        #if CPU_ARM_AT91
                #define CPU_RAM_START           0x00200000
+       #elif CPU_ARM_LPC2
+               #define CPU_RAM_START           0x40000000
        #else
                #warning Fix CPU_RAM_START address for your ARM, default value set to 0x200
                #define CPU_RAM_START           0x200
@@ -139,7 +144,7 @@
                         * to get them transparently copied to SRAM for zero-wait-state
                         * operation.
                         */
-                       #define FAST_FUNC __attribute__((section(".data")))
+                       #define FAST_FUNC __attribute__((section(".ramfunc")))
 
                        /**
                         * Data attribute to move constant data to fast memory storage.
@@ -153,12 +158,54 @@
                        #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(".ramfunc")))
 
        #endif /* !__IAR_SYSTEMS_ICC_ */
+#elif CPU_CM3
+
+       #define CPU_REG_BITS           32
+       #define CPU_REGS_CNT           16
+       #define CPU_HARVARD            0
+
+       /// Valid pointers should be >= than this value (used for debug)
+       #if (CPU_CM3_LM3S1968 || CPU_CM3_LM3S8962 || CPU_CM3_STM32 || CPU_CM3_SAM3)
+               #define CPU_RAM_START 0x20000000
+       #else
+               #warning Fix CPU_RAM_START address for your Cortex-M3, default value set to 0x20000000
+               #define CPU_RAM_START 0x20000000
+       #endif
+
+    #if defined( __ICCARM__)
+        #if ((defined __LITTLE_ENDIAN__) && (__LITTLE_ENDIAN__ == 0))
+            #define CPU_BYTE_ORDER CPU_BIG_ENDIAN
+        #elif ((defined __LITTLE_ENDIAN__) && (__LITTLE_ENDIAN__ == 1))
+                   #define CPU_BYTE_ORDER CPU_LITTLE_ENDIAN
+        #else
+            #error Unable to detect Cortex-M3 endianess!
+        #endif
+
+       #define NOP            __no_operation()
+    #else
+        #if defined(__ARMEB__) // GCC
+            #define CPU_BYTE_ORDER CPU_BIG_ENDIAN
+        #elif defined(__ARMEL__) // GCC
+            #define CPU_BYTE_ORDER CPU_LITTLE_ENDIAN
+        #else
+            #error Unable to detect Cortex-M3 endianess!
+        #endif
+
+       #define NOP         asm volatile ("nop")
+       #define PAUSE       asm volatile ("wfi" ::: "memory")
+       #define BREAKPOINT  /* asm("bkpt 0") DOES NOT WORK */
+
+       /*
+        * Function attribute to move it into ram memory.
+        */
+       #define RAM_FUNC __attribute__((section(".ramfunc")))
+    #endif
 
 #elif CPU_PPC
 
@@ -180,7 +227,7 @@
        #define CPU_REG_BITS            16
        #define CPU_REGS_CNT            FIXME
        #define CPU_BYTE_ORDER          CPU_BIG_ENDIAN
-       #define CPU_HARVARD             1
+       #define CPU_HARVARD             1
 
        /* Memory is word-addessed in the DSP56K */
        #define CPU_BITS_PER_CHAR  16
@@ -207,15 +254,29 @@
        /// Valid pointers should be >= than this value (used for debug)
        #if CPU_AVR_ATMEGA8 || CPU_AVR_ATMEGA32 || CPU_AVR_ATMEGA103
                #define CPU_RAM_START       0x60
-       #elif CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128 || CPU_AVR_ATMEGA168
+       #elif CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128 || CPU_AVR_ATMEGA168 || CPU_AVR_ATMEGA328P
                #define CPU_RAM_START       0x100
-       #elif CPU_AVR_ATMEGA1281
+       #elif CPU_AVR_ATMEGA1281 || CPU_AVR_ATMEGA1280 || CPU_AVR_ATMEGA2560
                #define CPU_RAM_START       0x200
+       #elif CPU_AVR_XMEGA
+               #define CPU_RAM_START           0x2000
        #else
                #warning Fix CPU_RAM_START address for your AVR, default value set to 0x100
                #define CPU_RAM_START       0x100
        #endif
 
+#elif CPU_MSP430
+
+       #define CPU_REG_BITS            16
+       #define CPU_REGS_CNT            12
+       #define CPU_BYTE_ORDER          CPU_LITTLE_ENDIAN
+       #define CPU_HARVARD                     0
+
+       /// Valid pointers should be >= than this value (used for debug)
+       #define CPU_RAM_START           0x200
+
+       #define NOP                     __asm__ __volatile__ ("nop")
+
 #else
        #error No CPU_... defined.
 #endif
@@ -234,4 +295,9 @@
        #define FAST_RODATA /* */
 #endif
 
+#ifndef PAUSE
+       /// Generic PAUSE implementation.
+       #define PAUSE   do {NOP; MEMORY_BARRIER;} while (0)
+#endif
+
 #endif /* CPU_ATTR_H */