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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [libgloss/] [m68k/] [mvme.S] - Blame information for rev 258

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Line No. Rev Author Line
1 207 jeremybenn
/* mvme.S -- board support for m68k
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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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        .title "mvme.S for m68k-coff"
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        .align  2
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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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        .global SYM (exceptionHandler)
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        .set    vbr_size, 0x400
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        .comm   SYM (vbr_table), vbr_size
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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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SYM (_exit):
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        unlk    a6
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        trap IMM(15)
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        .word return
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        .align  2
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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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        .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    a6, 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    a6
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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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        .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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        .align  2
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SYM (outln):
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        link    a6, 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    a6
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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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        .align  2
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SYM (outstr):
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        link    a6, 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    a6
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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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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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/*
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 * These constants are for the MVME-135 board's boot monitor. They
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 * are used with a TRAP 15 call to access the monitor's I/O routines.
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 * they must be in the word following the trap call.
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 */
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        .set inchr, 0x0
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        .set instat, 0x1
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        .set inln, 0x2
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        .set readstr, 0x3
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        .set readln, 0x4
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        .set chkbrk, 0x5
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        .set outchr, 0x20
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        .set outstr, 0x21
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        .set outln, 0x22
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        .set write, 0x23
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        .set writeln, 0x24
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        .set writdln, 0x25
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        .set pcrlf, 0x26
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        .set eraseln, 0x27
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        .set writd, 0x28
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        .set sndbrk, 0x29
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        .set tm_ini, 0x40
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        .set dt_ini, 0x42
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        .set tm_disp, 0x43
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        .set tm_rd, 0x44
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        .set redir, 0x60
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        .set redir_i, 0x61
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        .set redir_o, 0x62
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        .set return, 0x63
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        .set bindec, 0x64
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        .set changev, 0x67
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        .set strcmp, 0x68
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        .set mulu32, 0x69
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        .set divu32, 0x6A
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        .set chk_sum, 0x6B

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