start12.c

应用于MC9S12DG128的ucos系统

             PSHX                           ; save address of next function to initialize
             PSHY                           ; save cpp counter
             CALL  [-3,X]                   ; use double indirect call to load the page register also
             PULY                           ; restore cpp counter
             PULX                           ; restore actual address
             DEY                            ; decrement cpp counter
             BNE    nextInit
#else  /* defined( __BANKED__) || defined(__LARGE__) */

             LDD   _startupData.nofInitBodies; load number of cpp.
             BEQ   done                     ; if cppcount == 0, goto done
             LDX   _startupData.initBodies  ; load address of first module to initialize
nextInit:
             LDY   2,X+                     ; load address of first module to initialize
             PSHD
             PSHX                           ; save actual address
             JSR   0,Y                      ; call initialization function
             PULX                           ; restore actual address
             PULD                           ; restore cpp counter
             DBNE D, nextInit
#endif /* defined( __BANKED__) || defined(__LARGE__) */
#else /* __ELF_OBJECT_FILE_FORMAT__  */
             LDX   _startupData.mInits      ; load address of first module to initialize
#if defined( __BANKED__) || defined(__LARGE__)
nextInit:    LDY   3,X+                     ; load address of initialization function
             BEQ   done                     ; stop when address  == 0
                                            ; in common environments the offset of a function is never 0, so this test could be avoided
#ifdef __InitFunctionsMayHaveOffset0__
             BRCLR -1,X, done, 0xff         ; stop when address  == 0
#endif  /* __InitFunctionsMayHaveOffset0__ */
             PSHX                           ; save address of next function to initialize
             CALL  [-3,X]                   ; use double indirect call to load the page register also
#else  /* defined( __BANKED__) || defined(__LARGE__) */
nextInit:
             LDY   2,X+                     ; load address of first module to initialize
             BEQ   done                     ; stop when address of function == 0
             PSHX                           ; save actual address
             JSR   0,Y                      ; call initialization function
#endif /* defined( __BANKED__) || defined(__LARGE__) */
             PULX                           ; restore actual address
             BRA   nextInit
#endif  /* __ELF_OBJECT_FILE_FORMAT__  */
done:
#endif /* __cplusplus */
   }
}

#if defined( __ELF_OBJECT_FILE_FORMAT__) && defined(__cplusplus )

#if !defined(FAR_DATA) && (defined( __BANKED__) || defined(__LARGE__))
static void __far Fini(void)
#else
static void Fini(void)
#endif
{
/* purpose:     1) call global destructors in C++ */
   __asm {
#if defined( __BANKED__) || defined(__LARGE__)

             LDY   _startupData.nofFiniBodies; load number of cpp.
             BEQ   done                     ; if cppcount == 0, goto done
             LDX   _startupData.finiBodies  ; load address of first module to finalize
nextInit2:
             LEAX   3,X                     ; increment to next init
             PSHX                           ; save address of next function to finalize
             PSHY                           ; save cpp counter
             CALL  [-3,X]                   ; use double indirect call to load the page register also
             PULY                           ; restore cpp counter
             PULX                           ; restore actual address
             DEY                            ; decrement cpp counter
             BNE    nextInit2
#else  /* defined( __BANKED__) || defined(__LARGE__) */

             LDD   _startupData.nofFiniBodies; load number of cpp.
             BEQ   done                     ; if cppcount == 0, goto done
             LDX   _startupData.finiBodies  ; load address of first module to finalize
nextInit2:
             LDY   2,X+                     ; load address of first module to finalize
             PSHD
             PSHX                           ; save actual address
             JSR   0,Y                      ; call finalize function
             PULX                           ; restore actual address
             PULD                           ; restore cpp counter
             DBNE D, nextInit2
#endif /* defined( __BANKED__) || defined(__LARGE__) */
done:;
   }
}
#endif


#include "non_bank.sgm"

#pragma MESSAGE DISABLE C12053 /* Stack-pointer change not in debugging-information */
#pragma NO_FRAME
#pragma NO_ENTRY
#pragma NO_EXIT

#ifdef __cplusplus
  extern "C"
#endif

/* The function _Startup must be called in order to initialize global variables and to call main */
/* You can adapt this function or call it from your startup code to implement a different startup */
/* functionality. */

/* You should also setup the needed IO registers as WINDEF (HC12A4 only) or the COP registers to run */
/* on hardware */

/* to set the reset vector several ways are possible : */
/* 1. define the function with "interrupt 0" as done below in the first case */
/* 2. add the following line to your prm file : VECTOR ADDRESS 0xfffe _Startup */
/* of course, even more posibilities exists */
/* the reset vector must be set so that the application has a defined entry point */

#define STARTUP_FLAGS_NOT_INIT_SP   (1<<1)

#if defined(__SET_RESET_VECTOR__)
void __interrupt 0 _Startup(void) {
#else
void _Startup(void) {
#endif
/*  purpose:    1)  initialize the stack
                2)  initialize the RAM, copy down init data etc (Init)
                3)  call main;
    parameters: NONE
    called from: _PRESTART-code generated by the Linker 
                 or directly referenced by the reset vector */
  for(;;) { /* forever: initialize the program; call the root-procedure */
      if (!(_startupData.flags&STARTUP_FLAGS_NOT_INIT_SP)) {
        /* initialize the stack pointer */
        INIT_SP_FROM_STARTUP_DESC(); /*lint !e522 asm code */ /* HLI macro definition in hidef.h */
      }

#ifdef _HCS12_SERIALMON
      /* for Monitor based software remap the RAM & EEPROM to adhere
         to EB386. Edit RAM and EEPROM sections in PRM file to match these. */
      ___INITRG = 0x00;  /* lock registers block to 0x0000 */
      ___INITRM = 0x39;  /* lock Ram to end at 0x3FFF */
      ___INITEE = 0x09;  /* lock EEPROM block to end at 0x0fff */
#endif
      
      /* Here user defined code could be inserted, the stack could be used */
#if defined(_DO_DISABLE_COP_)
      _DISABLE_COP();
#endif 

      /* Example : Set up WinDef Register to allow Paging */
#ifdef HC812A4 /* HC12 A4 derivative needs WINDEF to configure which pages are available */
#if  (__ENABLE_EPAGE__ != 0 ||  __ENABLE_DPAGE__ != 0 || __ENABLE_PPAGE__ != 0)
      WINDEF= __ENABLE_EPAGE__ | __ENABLE_DPAGE__  | __ENABLE_PPAGE__;
#endif
#endif
      Init(); /* zero out, copy down, call constructors */
      /* Here user defined code could be inserted, all global variables are initilized */
#if defined(_DO_ENABLE_COP_)
      _ENABLE_COP(1);
#endif

      /* call main() */
      (*_startupData.main)();

      /* call destructors. Only done when this file is compiled as C++ and for the ELF object file format */
      /* the HIWARE object file format does not support this */
#if defined( __ELF_OBJECT_FILE_FORMAT__) && defined(__cplusplus )
      Fini();
#endif

   } /* end loop forever */
}