Merge da SC: prima versione veramente funzionante

[bertos.git] / cpu.h

diff --git a/cpu.h b/cpu.h
index f373b7b1ac55e2b3f9a3dc52a8b240dc797b0525..096a5563e5f39b97d61a73d82436b07b266c767b 100755 (executable)
--- a/cpu.h
+++ b/cpu.h
@@ -17,6 +17,9 @@
 
 /*
  * $Log$
+ * Revision 1.10  2004/08/02 20:20:29  aleph
+ * Merge from project_ks
+ *
  * Revision 1.9  2004/07/30 14:24:16  rasky
  * Task switching con salvataggio perfetto stato di interrupt (SR)
  * Kernel monitor per dump informazioni su stack dei processi
@@ -52,15 +55,12 @@
 #include "compiler.h"
 
 
-//! Initialization value for registers in stack frame
-#define CPU_REG_INIT_VALUE(reg)     0
-
-// Macros for determining CPU endianess
+// Macros for determining CPU endianness
 #define CPU_BIG_ENDIAN    0x1234
 #define CPU_LITTLE_ENDIAN 0x3412
 
 // Macros to include cpu-specific version of the headers
-#define CPU_HEADER(module)          PP_STRINGIZE(PP_CAT4(module, _, CPU_ID, .h))
+#define CPU_HEADER(module)          PP_STRINGIZE(PP_CAT3(module, _, CPU_ID).h)
 
 
 #if CPU_I196
@@ -136,11 +136,27 @@
        typedef uint8_t cpuflags_t;
        typedef uint8_t cpustack_t;
 
-       #define CPU_REGS_CNT            32
-       #define CPU_SAVED_REGS_CNT      18
+       /* Register counts include SREG too */
+       #define CPU_REGS_CNT            33
+       #define CPU_SAVED_REGS_CNT      19
        #define CPU_STACK_GROWS_UPWARD  0
        #define CPU_SP_ON_EMPTY_SLOT    1
        #define CPU_BYTE_ORDER          CPU_LITTLE_ENDIAN
+
+       /*!
+        * Initialization value for registers in stack frame.
+        * The register index is not directly corrispondent to CPU
+        * register numbers. Index 0 is the SREG register: the initial
+        * value is all 0 but the interrupt bit (bit 7).
+        */
+       #define CPU_REG_INIT_VALUE(reg) (reg == 0 ? 0x80 : 0)
+
+#endif
+
+
+//! Default for macro not defined in the right arch section
+#ifndef CPU_REG_INIT_VALUE
+       #define CPU_REG_INIT_VALUE(reg)     0
 #endif