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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [libgloss/] [m68k/] [cpu32bug.S] - Blame information for rev 207

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Line No. Rev Author Line
1 207 jeremybenn
/*
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 * cpu32bug.S -- board support for the CPU32BUG monitor.
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 *
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 * Copyright (c) 1995, 1996 Cygnus Support
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 *
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 * The authors hereby grant permission to use, copy, modify, distribute,
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 * and license this software and its documentation for any purpose, provided
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 * that existing copyright notices are retained in all copies and that this
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 * notice is included verbatim in any distributions. No written agreement,
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 * license, or royalty fee is required for any of the authorized uses.
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 * Modifications to this software may be copyrighted by their authors
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 * and need not follow the licensing terms described here, provided that
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 * the new terms are clearly indicated on the first page of each file where
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 * they apply.
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 */
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#include "asm.h"
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#include "cpu32bug.h"
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        .title "cpu32bug.S for m68k-coff"
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        .text
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        .global SYM (_exit)
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        .global SYM (outln)
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        .global SYM (outbyte)
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        .global SYM (putDebugChar)
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        .global SYM (inbyte)
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        .global SYM (getDebugChar)
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        .global SYM (havebyte)
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/*
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 * _exit -- Exit from the application. Normally we cause a user trap
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 *          to return to the ROM monitor for another run.
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 */
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        .text
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        .align  2
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SYM (_exit):
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        link    fp, IMM(0)
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        trap    IMM(15)
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        .word   RETURN
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/*
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 * inbyte -- get a byte from the serial port
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 *      d0 - contains the byte read in
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 */
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        .text
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        .align  2
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SYM (getDebugChar):             /* symbol name used by m68k-stub */
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SYM (inbyte):
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        link    fp, IMM(-8)
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        trap    IMM(15)
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        .word   INCHR
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        moveb   sp@, d0
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        extw    d0
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        extl    d0
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        unlk    fp
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        rts
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/*
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 * outbyte -- sends a byte out the serial port
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 *      d0 - contains the byte to be sent
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 */
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        .text
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        .align  2
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SYM (putDebugChar):             /* symbol name used by m68k-stub */
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SYM (outbyte):
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        link    fp, IMM(-4)
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        moveb   fp@(11), sp@
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        trap    IMM(15)
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        .word   OUTCHR
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        unlk    fp
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        rts
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/*
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 * outln -- sends a string of bytes out the serial port with a CR/LF
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 *      a0 - contains the address of the string's first byte
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 *      a1 - contains the address of the string's last byte
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 */
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        .text
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        .align  2
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SYM (outln):
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        link    fp, IMM(-8)
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        moveml  a0/a1, sp@
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        trap    IMM(15)
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        .word   OUTLN
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        unlk    fp
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        rts
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/*
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 * outstr -- sends a string of bytes out the serial port without a CR/LF
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 *      a0 - contains the address of the string's first byte
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 *      a1 - contains the address of the string's last byte
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 */
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        .text
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        .align  2
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SYM (outstr):
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        link    fp, IMM(-8)
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        moveml  a0/a1, sp@
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        trap    IMM(15)
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        .word   OUTSTR
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        unlk    fp
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        rts
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/*
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 * havebyte -- checks to see if there is a byte in the serial port,
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 *             returns 1 if there is a byte, 0 otherwise.
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 */
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        .text
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        .align  2
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SYM (havebyte):
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        trap    IMM(15)
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        .word   INSTAT
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        beqs    empty
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        movel   IMM(1), d0
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        rts
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empty:
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        movel   IMM(0), d0
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        rts

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