mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-26 04:31:03 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
164 lines
4.5 KiB
C
164 lines
4.5 KiB
C
/* Copyright (C) 1994, 1997 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil),
|
|
On-Line Applications Research Corporation.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <standalone.h>
|
|
#include "i386.h"
|
|
|
|
/* Console IO routines for a FORCE CPU386 board. */
|
|
|
|
/* Force CPU/386 specific IO addressing
|
|
*
|
|
* The following determines whether Port B or the Console should
|
|
* be used for console I/O. Setting ONE (and only ONE) of these to 1
|
|
* enables I/O on that port.
|
|
*
|
|
* PORT A - DUSCC MC68562 Channel A (*** not supported here ***)
|
|
* PORT B - DUSCC MC68562 Channel B
|
|
* PORT C - MFP MC68901 Channel (*** FORCEbug console ***)
|
|
*/
|
|
|
|
#define PORTB 1 /* use port b as console */
|
|
#define PORTC 0 /* use console port as console */
|
|
|
|
#if ( PORTB == 1 )
|
|
#define TX_STATUS 0x1b6 /* DUSCC General Status Register */
|
|
#define RX_STATUS 0x1b6 /* DUSCC General Status Register */
|
|
#define TX_BUFFER 0x1e0 /* DUSCC Transmitter Channel B */
|
|
#define RX_BUFFER 0x1e8 /* DUSCC Receiver Channel B */
|
|
#define Is_tx_ready( _status ) ( (_status) & 0x20 )
|
|
#define Is_rx_ready( _status ) ( (_status) & 0x10 )
|
|
#endif
|
|
|
|
#if ( PORTC == 1 )
|
|
#define TX_STATUS 0x12c /* MFP Transmit Status Register */
|
|
#define RX_STATUS 0x12a /* MFP Receive Status Register */
|
|
#define TX_BUFFER 0x12e /* MFP Transmitter Channel */
|
|
#define RX_BUFFER 0x12e /* MFP Receiver Channel */
|
|
#define Is_tx_ready( _status ) ( (_status) & 0x80 )
|
|
#define Is_rx_ready( _status ) ( (_status) & 0x80 )
|
|
#endif
|
|
|
|
/* _Console_Initialize
|
|
|
|
On the Force board the console require some initialization. */
|
|
|
|
void
|
|
_Console_Initialize ()
|
|
{
|
|
register unsigned8 ignored;
|
|
|
|
/* FORCE technical support mentioned that it may be necessary to
|
|
read the DUSCC RX_BUFFER port four times to remove all junk.
|
|
This code is a little more paranoid. */
|
|
|
|
inport_byte( RX_BUFFER, ignored );
|
|
inport_byte( RX_BUFFER, ignored );
|
|
inport_byte( RX_BUFFER, ignored );
|
|
inport_byte( RX_BUFFER, ignored );
|
|
inport_byte( RX_BUFFER, ignored );
|
|
}
|
|
|
|
/* Miscellaneous support for console IO */
|
|
|
|
static inline int _Force386_is_rx_ready ()
|
|
{
|
|
register unsigned8 status;
|
|
|
|
inport_byte( RX_STATUS, status );
|
|
|
|
if ( Is_rx_ready( status ) ) return 1;
|
|
else return 0;
|
|
}
|
|
|
|
static inline int _Force386_is_tx_ready ()
|
|
{
|
|
register unsigned8 status;
|
|
|
|
inport_byte( TX_STATUS, status );
|
|
|
|
if ( Is_tx_ready( status ) ) return 1;
|
|
else return 0;
|
|
}
|
|
|
|
|
|
static inline int _Force386_read_data ()
|
|
{
|
|
register unsigned8 ch;
|
|
|
|
#if ( PORTB == 1 )
|
|
/* Force example code resets the Channel B Receiver here.
|
|
* It appears to cause XON's to be lost.
|
|
*/
|
|
|
|
/* outport_byte( RX_STATUS, 0x10 ); */
|
|
#endif
|
|
|
|
inport_byte( RX_BUFFER, ch );
|
|
|
|
return ch;
|
|
}
|
|
|
|
/* _Console_Putc
|
|
|
|
This routine transmits a character. It supports XON/XOFF flow control. */
|
|
|
|
#define XON 0x11 /* control-Q */
|
|
#define XOFF 0x13 /* control-S */
|
|
|
|
int
|
|
_Console_Putc (ch)
|
|
char ch;
|
|
{
|
|
register unsigned8 inch;
|
|
|
|
while ( !_Force386_is_tx_ready() );
|
|
|
|
while ( _Force386_is_rx_ready() == 1 ) { /* must be an XOFF */
|
|
inch = _Force386_read_data();
|
|
if ( inch == XOFF )
|
|
do {
|
|
while ( _Force386_is_rx_ready() == 0 );
|
|
inch = _Force386_read_data();
|
|
} while ( inch != XON );
|
|
}
|
|
|
|
outport_byte( TX_BUFFER, ch );
|
|
return( 0 );
|
|
}
|
|
|
|
/* _Console_Getc
|
|
|
|
This routine reads a character from the UART and returns it. */
|
|
|
|
int
|
|
_Console_Getc (poll)
|
|
int poll;
|
|
{
|
|
if ( poll ) {
|
|
if ( !_Force386_is_rx_ready() )
|
|
return -1;
|
|
else
|
|
return _Force386_read_data();
|
|
} else {
|
|
while ( !_Force386_is_rx_ready() );
|
|
return _Force386_read_data();
|
|
}
|
|
}
|