src/part2/examples/txn/targets/rts430/boot_3.2.c

/*****************************************************************************/
/* BOOT.C   v3.2.0 - Initialize the MSP430 C runtime environment             */
/* Copyright (c) 2003-2009  Texas Instruments Incorporated                   */
/*****************************************************************************/
#include <stdlib.h>
#include <_lock.h>

extern int _args_main();
extern int main(int argc);
extern void exit(int status);
extern void _auto_init();
extern void __interrupt _c_int00();
extern int  _system_pre_init(void);

void              (*_cleanup_ptr)(void);
void _DATA_ACCESS (*_dtors_ptr)(int);

/*---------------------------------------------------------------------------*/
/* Allocate the memory for the system stack.  This section will be sized     */
/* by the linker.                                                            */
/*---------------------------------------------------------------------------*/
__asm("\t.global __STACK_END");
#pragma DATA_SECTION (_stack, ".stack");
#if defined(__LARGE_DATA_MODEL__)
long _stack;
#else
int _stack;
#endif

/*---------------------------------------------------------------------------*/
/*  Initialize reset vector to point at _c_int00                             */
/*  _c_int00 must always be located in low-memory on MSP430X devices.        */
/*---------------------------------------------------------------------------*/
#if defined(__LARGE_CODE_MODEL__)
_Pragma("CODE_SECTION(_c_int00, \".text:_isr\")")
#endif

__asm("\t.global _reset_vector");
__asm("\t.sect   \".reset\"");
__asm("\t.align  2");
__asm("_reset_vector:\n\t.field _c_int00, 16");

/*---------------------------------------------------------------------------*/
/* Macro to initialize stack pointer.  Stack grows towards lower memory.     */
/*---------------------------------------------------------------------------*/
#if defined(__LARGE_DATA_MODEL__)
#define STACK_INIT() __asm("\t   MOVX.A\t   #__STACK_END,SP")
#else
#define STACK_INIT() __asm("\t   MOV.W\t    #__STACK_END,SP")
#endif

/*---------------------------------------------------------------------------*/
/* Macros to initialize required global variables.                           */
/*---------------------------------------------------------------------------*/
#define INIT_LOCKS()     _lock = _nop; _unlock = _nop
#define INIT_EXIT_PTRS() _cleanup_ptr = NULL; _dtors_ptr = NULL

/*****************************************************************************/
/* C_INT00() - C ENVIRONMENT ENTRY POINT                                     */
/*****************************************************************************/
extern void __interrupt _c_int00()
{
   STACK_INIT();
   
   INIT_EXIT_PTRS();

   /*------------------------------------------------------------------------*/
   /* Allow for any application-specific low level initialization prior to   */
   /* initializing the C/C++ environment (global variable initialization,    */
   /* constructers).  If _system_pre_init() returns 0, then bypass C/C++     */
   /* initialization.  NOTE: BYPASSING THE CALL TO THE C/C++ INITIALIZATION  */
   /* ROUTINE MAY RESULT IN PROGRAM FAILURE.                                 */
   /*------------------------------------------------------------------------*/
   if (_system_pre_init() != 0) {
       INIT_LOCKS();
       _auto_init();
   }

   /*------------------------------------------------------------------------*/
   /* Handle any argc/argv arguments if supported by an MSP430 loader.       */
   /*------------------------------------------------------------------------*/
   _args_main();

   exit(1);
}