156 lines
3.3 KiB
ArmAsm
156 lines
3.3 KiB
ArmAsm
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/* 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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