diff options
Diffstat (limited to 'sysdeps/standalone/i386/force_cpu386/console.c')
| -rw-r--r-- | sysdeps/standalone/i386/force_cpu386/console.c | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/sysdeps/standalone/i386/force_cpu386/console.c b/sysdeps/standalone/i386/force_cpu386/console.c deleted file mode 100644 index 4c7271b660..0000000000 --- a/sysdeps/standalone/i386/force_cpu386/console.c +++ /dev/null @@ -1,163 +0,0 @@ -/* 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(); - } -} |