119 lines
2.5 KiB
ArmAsm
119 lines
2.5 KiB
ArmAsm
|
/*
|
||
|
|
* cpu32bug.S -- board support for the CPU32BUG monitor.
|
||
|
|
*
|
||
|
|
* Copyright (c) 1995, 1996 Cygnus Support
|
||
|
|
*
|
||
|
|
* The authors hereby grant permission to use, copy, modify, distribute,
|
||
|
|
* and license this software and its documentation for any purpose, provided
|
||
|
|
* that existing copyright notices are retained in all copies and that this
|
||
|
|
* notice is included verbatim in any distributions. No written agreement,
|
||
|
|
* license, or royalty fee is required for any of the authorized uses.
|
||
|
|
* Modifications to this software may be copyrighted by their authors
|
||
|
|
* and need not follow the licensing terms described here, provided that
|
||
|
|
* the new terms are clearly indicated on the first page of each file where
|
||
|
|
* they apply.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "asm.h"
|
||
|
|
#include "cpu32bug.h"
|
||
|
|
|
||
|
|
.title "cpu32bug.S for m68k-coff"
|
||
|
|
|
||
|
|
.text
|
||
|
|
.global SYM (_exit)
|
||
|
|
.global SYM (outln)
|
||
|
|
.global SYM (outbyte)
|
||
|
|
.global SYM (putDebugChar)
|
||
|
|
.global SYM (inbyte)
|
||
|
|
.global SYM (getDebugChar)
|
||
|
|
.global SYM (havebyte)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* _exit -- Exit from the application. Normally we cause a user trap
|
||
|
|
* to return to the ROM monitor for another run.
|
||
|
|
*/
|
||
|
|
.text
|
||
|
|
.align 2
|
||
|
|
SYM (_exit):
|
||
|
|
link fp, IMM(0)
|
||
|
|
trap IMM(15)
|
||
|
|
.word RETURN
|
||
|
|
|
||
|
|
/*
|
||
|
|
* inbyte -- get a byte from the serial port
|
||
|
|
* d0 - contains the byte read in
|
||
|
|
*/
|
||
|
|
.text
|
||
|
|
.align 2
|
||
|
|
SYM (getDebugChar): /* symbol name used by m68k-stub */
|
||
|
|
SYM (inbyte):
|
||
|
|
link fp, IMM(-8)
|
||
|
|
trap IMM(15)
|
||
|
|
.word INCHR
|
||
|
|
moveb sp@, d0
|
||
|
|
extw d0
|
||
|
|
extl d0
|
||
|
|
unlk fp
|
||
|
|
rts
|
||
|
|
|
||
|
|
/*
|
||
|
|
* outbyte -- sends a byte out the serial port
|
||
|
|
* d0 - contains the byte to be sent
|
||
|
|
*/
|
||
|
|
.text
|
||
|
|
.align 2
|
||
|
|
SYM (putDebugChar): /* symbol name used by m68k-stub */
|
||
|
|
SYM (outbyte):
|
||
|
|
link fp, IMM(-4)
|
||
|
|
moveb fp@(11), sp@
|
||
|
|
trap IMM(15)
|
||
|
|
.word OUTCHR
|
||
|
|
unlk fp
|
||
|
|
rts
|
||
|
|
|
||
|
|
/*
|
||
|
|
* outln -- sends a string of bytes out the serial port with a CR/LF
|
||
|
|
* a0 - contains the address of the string's first byte
|
||
|
|
* a1 - contains the address of the string's last byte
|
||
|
|
*/
|
||
|
|
.text
|
||
|
|
.align 2
|
||
|
|
SYM (outln):
|
||
|
|
link fp, IMM(-8)
|
||
|
|
moveml a0/a1, sp@
|
||
|
|
trap IMM(15)
|
||
|
|
.word OUTLN
|
||
|
|
unlk fp
|
||
|
|
rts
|
||
|
|
|
||
|
|
/*
|
||
|
|
* outstr -- sends a string of bytes out the serial port without a CR/LF
|
||
|
|
* a0 - contains the address of the string's first byte
|
||
|
|
* a1 - contains the address of the string's last byte
|
||
|
|
*/
|
||
|
|
.text
|
||
|
|
.align 2
|
||
|
|
SYM (outstr):
|
||
|
|
link fp, IMM(-8)
|
||
|
|
moveml a0/a1, sp@
|
||
|
|
trap IMM(15)
|
||
|
|
.word OUTSTR
|
||
|
|
unlk fp
|
||
|
|
rts
|
||
|
|
|
||
|
|
/*
|
||
|
|
* havebyte -- checks to see if there is a byte in the serial port,
|
||
|
|
* returns 1 if there is a byte, 0 otherwise.
|
||
|
|
*/
|
||
|
|
.text
|
||
|
|
.align 2
|
||
|
|
SYM (havebyte):
|
||
|
|
trap IMM(15)
|
||
|
|
.word INSTAT
|
||
|
|
beqs empty
|
||
|
|
movel IMM(1), d0
|
||
|
|
rts
|
||
|
|
empty:
|
||
|
|
movel IMM(0), d0
|
||
|
|
rts
|