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588 |
jeremybenn |
/*****************************************************
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start12.c - standard startup code
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The startup code may be optimized to special user requests
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----------------------------------------------------
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Copyright (c) Metrowerks, Basel, Switzerland
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All rights reserved
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Do not modify!
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Note: ROM libraries are not implemented in this startup code
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Note: C++ destructors of global objects are NOT yet supported in the HIWARE Object File Format.
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To use this feature, please build your application with the ELF object file format.
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*****************************************************/
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#include "hidef.h"
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#include "start12.h"
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/* Macros to control how the startup code handles the COP: */
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/* #define _DO_FEED_COP_ : do feed the COP */
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/* #define _DO_ENABLE_COP_: do enable the COP */
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/* #define _DO_DISABLE_COP_: disable the COP */
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/* Without defining any of these, the startup code does NOT handle the COP */
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#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 */
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struct _tagStartup _startupData; /* read-only: */
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/* _startupData is allocated in ROM and */
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/* initialized by the linker */
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#pragma DATA_SEG DEFAULT
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#if defined(FAR_DATA)
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#include "non_bank.sgm"
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/* the init function must be in non banked memory if banked variables are used */
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/* because _SET_PAGE is called, which may change any page register. */
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#ifdef __cplusplus
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extern "C"
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#endif
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void _SET_PAGE(void); /* the inline assembler needs a prototype */
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/* this is a runtime routine with a special */
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/* calling convention, dont use it in c code! */
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static void Init(void);
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static void Fini(void);
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#else
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#include "default.sgm"
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#if defined( __BANKED__) || defined(__LARGE__)
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static void __far Init(void);
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static void __far Fini(void);
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#endif /* defined( __BANKED__) || defined(__LARGE__) */
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#endif /* FAR_DATA */
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/* define value and bits for Windef Register */
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#ifdef HC812A4
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#define WINDEF (*(volatile unsigned char*) 0x37)
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#if defined( __BANKED__) || defined(__LARGE__) || defined(__PPAGE__)
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#define __ENABLE_PPAGE__ 0x40
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#else
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#define __ENABLE_PPAGE__ 0x0
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#endif
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#if defined(__DPAGE__)
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#define __ENABLE_DPAGE__ 0x80
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#else
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#define __ENABLE_DPAGE__ 0x0
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#endif
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#if defined(__EPAGE__)
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#define __ENABLE_EPAGE__ 0x20
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#else
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#define __ENABLE_EPAGE__ 0x0
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#endif
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#endif /* HC812A4 */
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#ifdef _HCS12_SERIALMON
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/* for Monitor based software remap the RAM & EEPROM to adhere
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to EB386. Edit RAM and EEPROM sections in PRM file to match these. */
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#define ___INITRM (*(volatile unsigned char *) 0x0010)
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#define ___INITRG (*(volatile unsigned char *) 0x0011)
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#define ___INITEE (*(volatile unsigned char *) 0x0012)
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#endif
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#if defined(_DO_FEED_COP_)
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#define __FEED_COP_IN_HLI() } __asm movb #0x55, _COP_RST_ADR; __asm movb #0xAA, _COP_RST_ADR; __asm {
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#else
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#define __FEED_COP_IN_HLI() /* do nothing */
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#endif
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#if !defined(FAR_DATA) && (defined( __BANKED__) || defined(__LARGE__))
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static void __far Init(void)
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#else
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static void Init(void)
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#endif
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{
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/* purpose: 1) zero out RAM-areas where data is allocated */
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/* 2) copy initialization data from ROM to RAM */
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/* 3) call global constructors in C++ */
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/* called from: _Startup, LibInits */
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__asm {
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ZeroOut:
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#if defined(__HIWARE_OBJECT_FILE_FORMAT__) && defined(__LARGE__)
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LDX _startupData.pZeroOut:1 ; in the large memory model in the HIWARE format, pZeroOut is a 24 bit pointer
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#else
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LDX _startupData.pZeroOut ; *pZeroOut
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#endif
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LDY _startupData.nofZeroOuts ; nofZeroOuts
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BEQ CopyDown ; if nothing to zero out
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NextZeroOut: PSHY ; save nofZeroOuts
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#ifdef FAR_DATA
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LDAB 1,X+ ; load page of destination address
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LDY 2,X+ ; load offset of destination address
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__PIC_JSR(_SET_PAGE) ; sets the page in the correct page register
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#else /* FAR_DATA */
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LDY 2,X+ ; start address and advance *pZeroOut (X = X+4)
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#endif /* FAR_DATA */
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LDD 2,X+ ; byte count
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#ifdef __OPTIMIZE_FOR_SIZE__ /* -os, default */
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NextWord: CLR 1,Y+ ; clear memory byte
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__FEED_COP_IN_HLI() ; feed the COP if necessary /*lint !e505 !e522 asm code */
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DBNE D, NextWord ; dec byte count
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#else
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LSRD ; /2 and save bit 0 in the carry
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PSHX
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LDX #0
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LoopClrW: STX 2,Y+ ; Word-Clear
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__FEED_COP_IN_HLI() ; feed the COP if necessary /*lint !e505 !e522 asm code */
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DBNE D, LoopClrW
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PULX
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BCC LastClr ; handle last byte
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CLR 1,Y+
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LastClr:
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#endif
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PULY ; restore nofZeroOuts
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DEY ; dec nofZeroOuts
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BNE NextZeroOut
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CopyDown:
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#ifdef __ELF_OBJECT_FILE_FORMAT__
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LDX _startupData.toCopyDownBeg ; load address of copy down desc.
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#else
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LDX _startupData.toCopyDownBeg:2 ; load address of copy down desc.
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#endif
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NextBlock:
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LDD 2,X+ ; size of init-data -> D
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BEQ funcInits ; end of copy down desc.
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#ifdef FAR_DATA
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PSHD ; save counter
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LDAB 1,X+ ; load destination page
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LDY 2,X+ ; destination address
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__PIC_JSR(_SET_PAGE) ; sets the destinations page register
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PULD ; restore counter
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#else /* FAR_DATA */
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LDY 2,X+ ; load destination address
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#endif /* FAR_DATA */
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#ifdef __OPTIMIZE_FOR_SIZE__ /* -os, default */
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Copy: MOVB 1,X+,1,Y+ ; move a byte from ROM to the data area
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__FEED_COP_IN_HLI() ; feed the COP if necessary /*lint !e505 !e522 asm code */
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DBNE D,Copy ; copy-byte loop
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#else
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LSRD ; /2 and save bit 0 in the carry
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Copy: MOVW 2,X+,2,Y+ ; move a word from ROM to the data area
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__FEED_COP_IN_HLI() ; feed the COP if necessary /*lint !e505 !e522 asm code */
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DBNE D,Copy ; copy-word loop
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BCC NextBlock ; handle last byte?
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MOVB 1,X+,1,Y+ ; copy the last byte
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#endif
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BRA NextBlock
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funcInits: ; call of global construtors is only in c++ necessary
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#if defined(__cplusplus)
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#if defined(__ELF_OBJECT_FILE_FORMAT__)
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#if defined( __BANKED__) || defined(__LARGE__)
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LDY _startupData.nofInitBodies; load number of cpp.
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BEQ done ; if cppcount == 0, goto done
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LDX _startupData.initBodies ; load address of first module to initialize
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nextInit:
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LEAX 3,X ; increment to next init
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PSHX ; save address of next function to initialize
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PSHY ; save cpp counter
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CALL [-3,X] ; use double indirect call to load the page register also
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PULY ; restore cpp counter
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PULX ; restore actual address
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DEY ; decrement cpp counter
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BNE nextInit
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#else /* defined( __BANKED__) || defined(__LARGE__) */
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| 182 |
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LDD _startupData.nofInitBodies; load number of cpp.
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BEQ done ; if cppcount == 0, goto done
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LDX _startupData.initBodies ; load address of first module to initialize
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nextInit:
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LDY 2,X+ ; load address of first module to initialize
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PSHD
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PSHX ; save actual address
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JSR 0,Y ; call initialization function
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PULX ; restore actual address
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PULD ; restore cpp counter
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| 192 |
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DBNE D, nextInit
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#endif /* defined( __BANKED__) || defined(__LARGE__) */
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| 194 |
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#else /* __ELF_OBJECT_FILE_FORMAT__ */
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| 195 |
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LDX _startupData.mInits ; load address of first module to initialize
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| 196 |
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#if defined( __BANKED__) || defined(__LARGE__)
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nextInit: LDY 3,X+ ; load address of initialization function
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BEQ done ; stop when address == 0
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; in common environments the offset of a function is never 0, so this test could be avoided
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| 200 |
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#ifdef __InitFunctionsMayHaveOffset0__
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| 201 |
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BRCLR -1,X, done, 0xff ; stop when address == 0
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| 202 |
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#endif /* __InitFunctionsMayHaveOffset0__ */
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| 203 |
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PSHX ; save address of next function to initialize
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| 204 |
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CALL [-3,X] ; use double indirect call to load the page register also
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#else /* defined( __BANKED__) || defined(__LARGE__) */
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| 206 |
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nextInit:
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| 207 |
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LDY 2,X+ ; load address of first module to initialize
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| 208 |
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BEQ done ; stop when address of function == 0
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| 209 |
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PSHX ; save actual address
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| 210 |
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JSR 0,Y ; call initialization function
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| 211 |
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#endif /* defined( __BANKED__) || defined(__LARGE__) */
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| 212 |
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PULX ; restore actual address
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| 213 |
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BRA nextInit
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| 214 |
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#endif /* __ELF_OBJECT_FILE_FORMAT__ */
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| 215 |
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done:
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| 216 |
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#endif /* __cplusplus */
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| 217 |
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}
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| 218 |
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}
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| 219 |
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| 220 |
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#if defined( __ELF_OBJECT_FILE_FORMAT__) && defined(__cplusplus )
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| 221 |
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| 222 |
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#if !defined(FAR_DATA) && (defined( __BANKED__) || defined(__LARGE__))
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| 223 |
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static void __far Fini(void)
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| 224 |
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#else
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| 225 |
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static void Fini(void)
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| 226 |
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#endif
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| 227 |
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{
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| 228 |
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/* purpose: 1) call global destructors in C++ */
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| 229 |
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__asm {
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| 230 |
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#if defined( __BANKED__) || defined(__LARGE__)
|
| 231 |
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| 232 |
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LDY _startupData.nofFiniBodies; load number of cpp.
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| 233 |
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BEQ done ; if cppcount == 0, goto done
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| 234 |
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LDX _startupData.finiBodies ; load address of first module to finalize
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| 235 |
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nextInit2:
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| 236 |
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LEAX 3,X ; increment to next init
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| 237 |
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PSHX ; save address of next function to finalize
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| 238 |
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PSHY ; save cpp counter
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| 239 |
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CALL [-3,X] ; use double indirect call to load the page register also
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| 240 |
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PULY ; restore cpp counter
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| 241 |
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PULX ; restore actual address
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| 242 |
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DEY ; decrement cpp counter
|
| 243 |
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BNE nextInit2
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| 244 |
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#else /* defined( __BANKED__) || defined(__LARGE__) */
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| 245 |
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| 246 |
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LDD _startupData.nofFiniBodies; load number of cpp.
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| 247 |
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BEQ done ; if cppcount == 0, goto done
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| 248 |
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LDX _startupData.finiBodies ; load address of first module to finalize
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| 249 |
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nextInit2:
|
| 250 |
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LDY 2,X+ ; load address of first module to finalize
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| 251 |
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PSHD
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| 252 |
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PSHX ; save actual address
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| 253 |
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JSR 0,Y ; call finalize function
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| 254 |
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PULX ; restore actual address
|
| 255 |
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PULD ; restore cpp counter
|
| 256 |
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DBNE D, nextInit2
|
| 257 |
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#endif /* defined( __BANKED__) || defined(__LARGE__) */
|
| 258 |
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done:;
|
| 259 |
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}
|
| 260 |
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}
|
| 261 |
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#endif
|
| 262 |
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|
| 263 |
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|
| 264 |
|
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#include "non_bank.sgm"
|
| 265 |
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|
| 266 |
|
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#pragma MESSAGE DISABLE C12053 /* Stack-pointer change not in debugging-information */
|
| 267 |
|
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#pragma NO_FRAME
|
| 268 |
|
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#pragma NO_ENTRY
|
| 269 |
|
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#pragma NO_EXIT
|
| 270 |
|
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|
| 271 |
|
|
#ifdef __cplusplus
|
| 272 |
|
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extern "C"
|
| 273 |
|
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#endif
|
| 274 |
|
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|
| 275 |
|
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/* The function _Startup must be called in order to initialize global variables and to call main */
|
| 276 |
|
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/* You can adapt this function or call it from your startup code to implement a different startup */
|
| 277 |
|
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/* functionality. */
|
| 278 |
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|
| 279 |
|
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/* You should also setup the needed IO registers as WINDEF (HC12A4 only) or the COP registers to run */
|
| 280 |
|
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/* on hardware */
|
| 281 |
|
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|
| 282 |
|
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/* to set the reset vector several ways are possible : */
|
| 283 |
|
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/* 1. define the function with "interrupt 0" as done below in the first case */
|
| 284 |
|
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/* 2. add the following line to your prm file : VECTOR ADDRESS 0xfffe _Startup */
|
| 285 |
|
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/* of course, even more posibilities exists */
|
| 286 |
|
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/* the reset vector must be set so that the application has a defined entry point */
|
| 287 |
|
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|
| 288 |
|
|
#define STARTUP_FLAGS_NOT_INIT_SP (1<<1)
|
| 289 |
|
|
|
| 290 |
|
|
#if defined(__SET_RESET_VECTOR__)
|
| 291 |
|
|
void __interrupt 0 _Startup(void) {
|
| 292 |
|
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#else
|
| 293 |
|
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void _Startup(void) {
|
| 294 |
|
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#endif
|
| 295 |
|
|
/* purpose: 1) initialize the stack
|
| 296 |
|
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2) initialize the RAM, copy down init data etc (Init)
|
| 297 |
|
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3) call main;
|
| 298 |
|
|
parameters: NONE
|
| 299 |
|
|
called from: _PRESTART-code generated by the Linker
|
| 300 |
|
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or directly referenced by the reset vector */
|
| 301 |
|
|
for(;;) { /* forever: initialize the program; call the root-procedure */
|
| 302 |
|
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if (!(_startupData.flags&STARTUP_FLAGS_NOT_INIT_SP)) {
|
| 303 |
|
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/* initialize the stack pointer */
|
| 304 |
|
|
INIT_SP_FROM_STARTUP_DESC(); /*lint !e522 asm code */ /* HLI macro definition in hidef.h */
|
| 305 |
|
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}
|
| 306 |
|
|
|
| 307 |
|
|
#ifdef _HCS12_SERIALMON
|
| 308 |
|
|
/* for Monitor based software remap the RAM & EEPROM to adhere
|
| 309 |
|
|
to EB386. Edit RAM and EEPROM sections in PRM file to match these. */
|
| 310 |
|
|
___INITRG = 0x00; /* lock registers block to 0x0000 */
|
| 311 |
|
|
___INITRM = 0x39; /* lock Ram to end at 0x3FFF */
|
| 312 |
|
|
___INITEE = 0x09; /* lock EEPROM block to end at 0x0fff */
|
| 313 |
|
|
#endif
|
| 314 |
|
|
|
| 315 |
|
|
/* Here user defined code could be inserted, the stack could be used */
|
| 316 |
|
|
#if defined(_DO_DISABLE_COP_)
|
| 317 |
|
|
_DISABLE_COP();
|
| 318 |
|
|
#endif
|
| 319 |
|
|
|
| 320 |
|
|
/* Example : Set up WinDef Register to allow Paging */
|
| 321 |
|
|
#ifdef HC812A4 /* HC12 A4 derivative needs WINDEF to configure which pages are available */
|
| 322 |
|
|
#if (__ENABLE_EPAGE__ != 0 || __ENABLE_DPAGE__ != 0 || __ENABLE_PPAGE__ != 0)
|
| 323 |
|
|
WINDEF= __ENABLE_EPAGE__ | __ENABLE_DPAGE__ | __ENABLE_PPAGE__;
|
| 324 |
|
|
#endif
|
| 325 |
|
|
#endif
|
| 326 |
|
|
Init(); /* zero out, copy down, call constructors */
|
| 327 |
|
|
/* Here user defined code could be inserted, all global variables are initilized */
|
| 328 |
|
|
#if defined(_DO_ENABLE_COP_)
|
| 329 |
|
|
_ENABLE_COP(1);
|
| 330 |
|
|
#endif
|
| 331 |
|
|
|
| 332 |
|
|
/* call main() */
|
| 333 |
|
|
(*_startupData.main)();
|
| 334 |
|
|
|
| 335 |
|
|
/* call destructors. Only done when this file is compiled as C++ and for the ELF object file format */
|
| 336 |
|
|
/* the HIWARE object file format does not support this */
|
| 337 |
|
|
#if defined( __ELF_OBJECT_FILE_FORMAT__) && defined(__cplusplus )
|
| 338 |
|
|
Fini();
|
| 339 |
|
|
#endif
|
| 340 |
|
|
|
| 341 |
|
|
} /* end loop forever */
|
| 342 |
|
|
}
|
