/* op50n-io.S -- low-level I/O routines for the Oki OP50N eval board.
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/* op50n-io.S -- low-level I/O routines for the Oki OP50N eval board.
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*
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*
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* Copyright (c) 1995 Cygnus Support
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* Copyright (c) 1995 Cygnus Support
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*
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*
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* The authors hereby grant permission to use, copy, modify, distribute,
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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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* 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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* 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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* 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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* 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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* 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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* 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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* the new terms are clearly indicated on the first page of each file where
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* they apply.
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* they apply.
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*/
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*/
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mon_start .EQU 0xd0000000
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mon_start .EQU 0xd0000000
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where_dp .EQU mon_start+4*4
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where_dp .EQU mon_start+4*4
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where_ci .EQU mon_start+14*4
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where_ci .EQU mon_start+14*4
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where_co .EQU mon_start+15*4
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where_co .EQU mon_start+15*4
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where_read .EQU mon_start+22*4
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where_read .EQU mon_start+22*4
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where_write .EQU mon_start+23*4
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where_write .EQU mon_start+23*4
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/*
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/*
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*int c = inbyte(wait);
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*int c = inbyte(wait);
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*/
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*/
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.space $TEXT$
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.space $TEXT$
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.align 4
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.align 4
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.EXPORT inbyte,CODE,ARGW0=GR,RTNVAL=GR
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.EXPORT inbyte,CODE,ARGW0=GR,RTNVAL=GR
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inbyte
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inbyte
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.PROC
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.PROC
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.CALLINFO CALLER,FRAME=64,SAVE_RP
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.CALLINFO CALLER,FRAME=64,SAVE_RP
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.ENTRY
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.ENTRY
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stw %r2,-20(0,%r30)
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stw %r2,-20(0,%r30)
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ldo 64(%r30),%r30
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ldo 64(%r30),%r30
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stw %r27,-56(0,%r30) ; save my dp
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stw %r27,-56(0,%r30) ; save my dp
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ldil l%where_dp,%r27 ; load monitors dp
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ldil l%where_dp,%r27 ; load monitors dp
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ldw r%where_dp(0,%r27),%r27
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ldw r%where_dp(0,%r27),%r27
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ldil l%where_ci,%r1
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ldil l%where_ci,%r1
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ldw r%where_ci(0,%r1),%r1
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ldw r%where_ci(0,%r1),%r1
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ble 0(0,%r1)
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ble 0(0,%r1)
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copy %r31,%r2
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copy %r31,%r2
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ldw -56(0,%r30),%r27 ; load my dp
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ldw -56(0,%r30),%r27 ; load my dp
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ldw -84(0,%r30),%r2
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ldw -84(0,%r30),%r2
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ldo -64(%r30),%r30
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ldo -64(%r30),%r30
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bv %r0(%r2)
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bv %r0(%r2)
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nop
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nop
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.EXIT
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.EXIT
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.PROCEND
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.PROCEND
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/* int c = outbyte(c);
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/* int c = outbyte(c);
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*/
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*/
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.EXPORT outbyte,CODE,ARGW0=GR,RTNVAL=GR
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.EXPORT outbyte,CODE,ARGW0=GR,RTNVAL=GR
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outbyte
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outbyte
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.PROC
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.PROC
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.CALLINFO CALLER,FRAME=64,SAVE_RP
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.CALLINFO CALLER,FRAME=64,SAVE_RP
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.ENTRY
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.ENTRY
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stw %r2,-20(0,%r30)
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stw %r2,-20(0,%r30)
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ldo 64(%r30),%r30
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ldo 64(%r30),%r30
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stw %r27,-56(0,%r30) ; save my dp
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stw %r27,-56(0,%r30) ; save my dp
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ldil l%where_dp,%r27 ; load monitors dp
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ldil l%where_dp,%r27 ; load monitors dp
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ldw r%where_dp(0,%r27),%r27
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ldw r%where_dp(0,%r27),%r27
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ldil l%where_co,%r1
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ldil l%where_co,%r1
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ldw r%where_co(0,%r1),%r1
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ldw r%where_co(0,%r1),%r1
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ble 0(0,%r1)
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ble 0(0,%r1)
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copy %r31,%r2
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copy %r31,%r2
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ldw -56(0,%r30),%r27 ; load my dp
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ldw -56(0,%r30),%r27 ; load my dp
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ldw -84(0,%r30),%r2
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ldw -84(0,%r30),%r2
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ldo -64(%r30),%r30
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ldo -64(%r30),%r30
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bv %r0(%r2)
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bv %r0(%r2)
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nop
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nop
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.EXIT
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.EXIT
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.PROCEND
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.PROCEND
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#if 0
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#if 0
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/* cnt = read(fd, bufp, cnt);
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/* cnt = read(fd, bufp, cnt);
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*/
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*/
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.EXPORT read,CODE,ARGW0=NO,ARGW1=NO,ARGW2=NO,ARGW3=NO,RTNVAL=NO
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.EXPORT read,CODE,ARGW0=NO,ARGW1=NO,ARGW2=NO,ARGW3=NO,RTNVAL=NO
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read
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read
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.PROC
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.PROC
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.CALLINFO FRAME=64,CALLS,SAVE_RP
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.CALLINFO FRAME=64,CALLS,SAVE_RP
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.ENTRY
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.ENTRY
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stw %r2,-20(0,%r30)
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stw %r2,-20(0,%r30)
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ldo 64(%r30),%r30
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ldo 64(%r30),%r30
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stw %dp,-56(0,%r30) ; save my dp
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stw %dp,-56(0,%r30) ; save my dp
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ldil l%where_dp,%dp ; load monitors dp
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ldil l%where_dp,%dp ; load monitors dp
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ldw r%where_dp(0,%dp), %dp
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ldw r%where_dp(0,%dp), %dp
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ldil l%where_read,%r1
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ldil l%where_read,%r1
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ldw r%where_read(0,%r1), %r1
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ldw r%where_read(0,%r1), %r1
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ble 0(0,%r1)
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ble 0(0,%r1)
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copy %r31,%r2
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copy %r31,%r2
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ldw -56(0,%r30),%dp ; load my dp
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ldw -56(0,%r30),%dp ; load my dp
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ldw -84(0,%r30),%r2
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ldw -84(0,%r30),%r2
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bv %r0(%r2)
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bv %r0(%r2)
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ldo -64(%r30),%r30
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ldo -64(%r30),%r30
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.EXIT
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.EXIT
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.PROCEND
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.PROCEND
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/* cnt = write(fd, bufp, cnt);
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/* cnt = write(fd, bufp, cnt);
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*/
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*/
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.EXPORT write,CODE,ARGW0=NO,ARGW1=NO,ARGW2=NO,ARGW3=NO,RTNVAL=NO
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.EXPORT write,CODE,ARGW0=NO,ARGW1=NO,ARGW2=NO,ARGW3=NO,RTNVAL=NO
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write
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write
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.PROC
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.PROC
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.CALLINFO FRAME=64,CALLS,SAVE_RP
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.CALLINFO FRAME=64,CALLS,SAVE_RP
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.ENTRY
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.ENTRY
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stw %r2,-20(0,%r30)
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stw %r2,-20(0,%r30)
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ldo 64(%r30),%r30
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ldo 64(%r30),%r30
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stw %dp,-56(0,%r30) ; save my dp
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stw %dp,-56(0,%r30) ; save my dp
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ldil l%where_dp,%dp ; load monitors dp
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ldil l%where_dp,%dp ; load monitors dp
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ldw r%where_dp(0,%dp), %dp
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ldw r%where_dp(0,%dp), %dp
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ldil l%where_write,%r1
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ldil l%where_write,%r1
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ldw r%where_write(0,%r1), %r1
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ldw r%where_write(0,%r1), %r1
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ble 0(0,%r1)
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ble 0(0,%r1)
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copy %r31,%r2
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copy %r31,%r2
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ldw -56(0,%r30),%dp ; load my dp
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ldw -56(0,%r30),%dp ; load my dp
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ldw -84(0,%r30),%r2
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ldw -84(0,%r30),%r2
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bv %r0(%r2)
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bv %r0(%r2)
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ldo -64(%r30),%r30
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ldo -64(%r30),%r30
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.EXIT
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.EXIT
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.PROCEND
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.PROCEND
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#endif
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#endif
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