www.pudn.com > ucosforcodewarrior-hc12.rar > Start12.c, change:2006-01-03,size:15442b


/***************************************************** 
      start12.c - standard startup code 
   The startup code may be optimized to special user requests 
 ---------------------------------------------------- 
   Copyright (c) Metrowerks, Basel, Switzerland 
               All rights reserved 
                  Do not modify! 
 
Note: ROM libraries are not implemented in this startup code 
Note: C++ destructors of global objects are NOT yet supported in the HIWARE Object File Format. 
      To use this feature, please build your application with the ELF object file format. 
 *****************************************************/ 
 
#include "hidef.h" 
#include "start12.h" 
 
/* Macros to control how the startup code handles the COP: */ 
/* #define _DO_FEED_COP_  : do feed the COP  */ 
/* #define _DO_ENABLE_COP_: do enable the COP  */ 
/* #define _DO_DISABLE_COP_: disable the COP */ 
/* Without defining any of these, the startup code does NOT handle the COP */ 
 
#pragma DATA_SEG __NEAR_SEG STARTUP_DATA /* _startupData can be accessed using 16 bit accesses. This is needed because it contains the stack top, and without stack, far data cannot be accessed */ 
struct _tagStartup _startupData;  /*   read-only: */ 
                                  /*   _startupData is allocated in ROM and */ 
                                  /*   initialized by the linker */ 
#pragma DATA_SEG DEFAULT 
#if defined(FAR_DATA) 
#include "non_bank.sgm" 
/* the init function must be in non banked memory if banked variables are used */ 
/* because _SET_PAGE is called, which may change any page register. */ 
 
#ifdef __cplusplus 
  extern "C" 
#endif 
void _SET_PAGE(void);             /* the inline assembler needs a prototype */ 
                                  /* this is a runtime routine with a special */ 
                                  /* calling convention, dont use it in c code! */ 
static void Init(void); 
static void Fini(void); 
#else 
#include "default.sgm" 
#if defined( __BANKED__) || defined(__LARGE__) 
static void __far Init(void); 
static void __far Fini(void); 
#endif /* defined( __BANKED__) || defined(__LARGE__) */ 
#endif /* FAR_DATA */ 
 
 
/* define value and bits for Windef Register */ 
#ifdef HC812A4 
#define WINDEF (*(volatile unsigned char*) 0x37) 
#if defined( __BANKED__) || defined(__LARGE__) || defined(__PPAGE__) 
#define __ENABLE_PPAGE__ 0x40 
#else 
#define __ENABLE_PPAGE__ 0x0 
#endif 
#if defined(__DPAGE__) 
#define __ENABLE_DPAGE__ 0x80 
#else 
#define __ENABLE_DPAGE__ 0x0 
#endif 
#if defined(__EPAGE__) 
#define __ENABLE_EPAGE__ 0x20 
#else 
#define __ENABLE_EPAGE__ 0x0 
#endif 
#endif  /* HC812A4 */ 
 
#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. */ 
#define ___INITRM      (*(volatile unsigned char *) 0x0010) 
#define ___INITRG      (*(volatile unsigned char *) 0x0011) 
#define ___INITEE      (*(volatile unsigned char *) 0x0012) 
#endif 
 
#if defined(_DO_FEED_COP_) 
#define __FEED_COP_IN_HLI()  } __asm movb #0x55, _COP_RST_ADR; __asm movb #0xAA, _COP_RST_ADR; __asm { 
#else 
#define __FEED_COP_IN_HLI() /* do nothing */ 
#endif 
 
#if !defined(FAR_DATA) && (defined( __BANKED__) || defined(__LARGE__)) 
static void __far Init(void) 
#else 
static void Init(void) 
#endif 
 { 
/* purpose:     1) zero out RAM-areas where data is allocated   */ 
/*              2) copy initialization data from ROM to RAM     */ 
/*              3) call global constructors in C++              */ 
/*   called from: _Startup, LibInits                            */ 
   __asm { 
ZeroOut: 
#if defined(__HIWARE_OBJECT_FILE_FORMAT__) && defined(__LARGE__) 
             LDX   _startupData.pZeroOut:1  ; in the large memory model in the HIWARE format, pZeroOut is a 24 bit pointer 
#else 
             LDX   _startupData.pZeroOut    ; *pZeroOut 
#endif 
             LDY   _startupData.nofZeroOuts ; nofZeroOuts 
             BEQ   CopyDown                 ; if nothing to zero out 
 
NextZeroOut: PSHY                           ; save nofZeroOuts 
#ifdef FAR_DATA 
             LDAB  1,X+                     ; load page of destination address 
             LDY   2,X+                     ; load offset of destination address 
             __PIC_JSR(_SET_PAGE)           ; sets the page in the correct page register 
#else   /* FAR_DATA */ 
             LDY   2,X+                     ; start address and advance *pZeroOut (X = X+4) 
#endif  /* FAR_DATA */ 
             LDD   2,X+                     ; byte count 
#ifdef  __OPTIMIZE_FOR_SIZE__               /* -os, default */ 
NextWord:    CLR   1,Y+                     ; clear memory byte 
             __FEED_COP_IN_HLI()            ; feed the COP if necessary /*lint !e505 !e522 asm code */ 
             DBNE  D, NextWord              ; dec byte count 
#else 
             LSRD                           ; /2 and save bit 0 in the carry 
             PSHX 
             LDX   #0 
LoopClrW:    STX   2,Y+                     ; Word-Clear 
             __FEED_COP_IN_HLI()            ; feed the COP if necessary /*lint !e505 !e522 asm code */ 
             DBNE  D, LoopClrW 
             PULX 
             BCC   LastClr                  ; handle last byte 
             CLR   1,Y+ 
LastClr: 
#endif 
             PULY                           ; restore nofZeroOuts 
             DEY                            ; dec nofZeroOuts 
             BNE  NextZeroOut 
CopyDown: 
#ifdef __ELF_OBJECT_FILE_FORMAT__ 
             LDX   _startupData.toCopyDownBeg ; load address of copy down desc. 
#else 
             LDX   _startupData.toCopyDownBeg:2 ; load address of copy down desc. 
#endif 
NextBlock: 
             LDD   2,X+                     ; size of init-data -> D 
             BEQ   funcInits                ; end of copy down desc. 
#ifdef FAR_DATA 
             PSHD                           ; save counter 
             LDAB  1,X+                     ; load destination page 
             LDY   2,X+                     ; destination address 
             __PIC_JSR(_SET_PAGE)           ; sets the destinations page register 
             PULD                           ; restore counter 
#else  /* FAR_DATA */ 
             LDY   2,X+                     ; load destination address 
#endif /* FAR_DATA */ 
 
#ifdef  __OPTIMIZE_FOR_SIZE__               /* -os, default */ 
Copy:        MOVB  1,X+,1,Y+                ; move a byte from ROM to the data area 
             __FEED_COP_IN_HLI()            ; feed the COP if necessary /*lint !e505 !e522 asm code */ 
             DBNE  D,Copy                   ; copy-byte loop 
#else 
             LSRD                           ; /2 and save bit 0 in the carry 
Copy:        MOVW  2,X+,2,Y+                ; move a word from ROM to the data area 
             __FEED_COP_IN_HLI()            ; feed the COP if necessary /*lint !e505 !e522 asm code */ 
             DBNE  D,Copy                   ; copy-word loop 
             BCC   NextBlock                ; handle last byte? 
             MOVB  1,X+,1,Y+                ; copy the last byte 
#endif 
             BRA   NextBlock 
funcInits:                                  ; call of global construtors is only in c++ necessary 
#if defined(__cplusplus) 
#if defined(__ELF_OBJECT_FILE_FORMAT__) 
#if defined( __BANKED__) || defined(__LARGE__) 
             LDY   _startupData.nofInitBodies; load number of cpp. 
             BEQ   done                     ; if cppcount == 0, goto done 
             LDX   _startupData.initBodies  ; load address of first module to initialize 
nextInit: 
             LEAX   3,X                     ; increment to next init 
             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 */ 
}