[752cd8f] | 1 | /* |
---|
| 2 | * This file contains the Force CPU386 console IO package. |
---|
| 3 | * |
---|
| 4 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
---|
| 5 | * On-Line Applications Research Corporation (OAR). |
---|
| 6 | * All rights assigned to U.S. Government, 1994. |
---|
| 7 | * |
---|
| 8 | * This material may be reproduced by or for the U.S. Government pursuant |
---|
| 9 | * to the copyright license under the clause at DFARS 252.227-7013. This |
---|
| 10 | * notice must appear in all copies of this file and its derivatives. |
---|
| 11 | * |
---|
| 12 | * $Id$ |
---|
| 13 | */ |
---|
| 14 | |
---|
| 15 | #define F386_INIT |
---|
| 16 | |
---|
| 17 | #include <stdlib.h> |
---|
| 18 | #include <stdio.h> /* to be removed */ |
---|
| 19 | |
---|
| 20 | #include <rtems.h> |
---|
| 21 | #include "console.h" |
---|
| 22 | #include "bsp.h" |
---|
| 23 | #include "../startup/80386ex.h" |
---|
| 24 | |
---|
| 25 | /* console_cleanup |
---|
| 26 | * |
---|
| 27 | * This routine is called at exit to clean up the console hardware. |
---|
| 28 | * |
---|
| 29 | * Input parameters: NONE |
---|
| 30 | * |
---|
| 31 | * Output parameters: NONE |
---|
| 32 | * |
---|
| 33 | * Return values: |
---|
| 34 | */ |
---|
| 35 | |
---|
| 36 | void console_cleanup( void ) |
---|
| 37 | { |
---|
| 38 | register rtems_unsigned8 ignored; |
---|
| 39 | |
---|
| 40 | /* clear the read buffer */ |
---|
| 41 | |
---|
| 42 | inport_byte( RBR0, ignored ); |
---|
| 43 | |
---|
| 44 | /* inport_byte( RBR0, ignored ); |
---|
| 45 | * inport_byte( RBR0, ignored ); |
---|
| 46 | * inport_byte( RBR0, ignored ); |
---|
| 47 | * inport_byte( RBR0, ignored ); |
---|
| 48 | */ |
---|
| 49 | |
---|
| 50 | } |
---|
| 51 | |
---|
| 52 | /* console_initialize |
---|
| 53 | * |
---|
| 54 | * This routine initializes the console IO driver. |
---|
| 55 | * |
---|
| 56 | * Input parameters: NONE |
---|
| 57 | * |
---|
| 58 | * Output parameters: NONE |
---|
| 59 | * |
---|
| 60 | * Return values: |
---|
| 61 | */ |
---|
| 62 | |
---|
| 63 | rtems_device_driver console_initialize( |
---|
| 64 | rtems_device_major_number major, |
---|
| 65 | rtems_device_minor_number minor, |
---|
| 66 | void *arg, |
---|
| 67 | rtems_id self, |
---|
| 68 | rtems_unsigned32 *status |
---|
| 69 | ) |
---|
| 70 | { |
---|
| 71 | /* |
---|
| 72 | * flush the console now and at exit. Just in case. |
---|
| 73 | */ |
---|
| 74 | |
---|
| 75 | console_cleanup(); |
---|
| 76 | |
---|
| 77 | atexit( console_cleanup ); |
---|
| 78 | } |
---|
| 79 | |
---|
| 80 | |
---|
| 81 | /* is_character_ready |
---|
| 82 | * |
---|
| 83 | * This routine returns TRUE if a character is available. |
---|
| 84 | * |
---|
| 85 | * Input parameters: NONE |
---|
| 86 | * |
---|
| 87 | * Output parameters: NONE |
---|
| 88 | * |
---|
| 89 | * Return values: |
---|
| 90 | */ |
---|
| 91 | |
---|
| 92 | rtems_boolean is_character_ready( |
---|
| 93 | char *ch |
---|
| 94 | ) |
---|
| 95 | { |
---|
| 96 | register rtems_unsigned8 status; |
---|
| 97 | |
---|
| 98 | inport_byte( LSR1, status ); |
---|
| 99 | |
---|
| 100 | if ( Is_rx_ready( status ) ) { |
---|
| 101 | inport_byte( RBR1, status ); |
---|
| 102 | *ch = status; |
---|
| 103 | return TRUE; |
---|
| 104 | } |
---|
| 105 | return FALSE; |
---|
| 106 | } |
---|
| 107 | |
---|
| 108 | /* inbyte |
---|
| 109 | * |
---|
| 110 | * This routine reads a character from the UART. |
---|
| 111 | * |
---|
| 112 | * Input parameters: NONE |
---|
| 113 | * |
---|
| 114 | * Output parameters: NONE |
---|
| 115 | * |
---|
| 116 | * Return values: |
---|
| 117 | * character read from UART |
---|
| 118 | */ |
---|
| 119 | |
---|
| 120 | char inbyte( void ) |
---|
| 121 | { |
---|
| 122 | register rtems_unsigned8 status; |
---|
| 123 | char ch; |
---|
| 124 | |
---|
| 125 | do { |
---|
| 126 | inport_byte( LSR1, status ); |
---|
| 127 | } while ( !( status & 0x01 ));/* s/b while ( !( Is_rx_ready( status ) ) ); */ |
---|
| 128 | |
---|
| 129 | inport_byte( RBR1, ch ); |
---|
| 130 | |
---|
| 131 | return ch; |
---|
| 132 | } |
---|
| 133 | |
---|
| 134 | /* outbyte |
---|
| 135 | * |
---|
| 136 | * This routine transmits a character out the port. It supports |
---|
| 137 | * XON/XOFF flow control. |
---|
| 138 | * |
---|
| 139 | * Input parameters: |
---|
| 140 | * ch - character to be transmitted |
---|
| 141 | * |
---|
| 142 | * Output parameters: NONE |
---|
| 143 | */ |
---|
| 144 | |
---|
| 145 | void outbyte( |
---|
| 146 | char ch |
---|
| 147 | ) |
---|
| 148 | { |
---|
| 149 | rtems_unsigned8 status; |
---|
| 150 | |
---|
| 151 | do { |
---|
| 152 | inport_byte( LSR1, status ); |
---|
| 153 | } while ( ! ( 0x40 & status ) ); /* ( Is_tx_ready( status ) ) );*/ |
---|
| 154 | |
---|
| 155 | /* |
---|
| 156 | * GDB will NOT use XON/XOFF protocol |
---|
| 157 | */ |
---|
| 158 | |
---|
| 159 | |
---|
| 160 | #ifdef USE_XON |
---|
| 161 | |
---|
| 162 | while ( is_character_ready( &status ) == TRUE ) { |
---|
| 163 | if ( status == XOFF ) |
---|
| 164 | do { |
---|
| 165 | while ( is_character_ready( &status ) == FALSE ) ; |
---|
| 166 | } while ( status != XON ); |
---|
| 167 | } |
---|
| 168 | |
---|
| 169 | #endif |
---|
| 170 | |
---|
| 171 | outport_byte( TBR1, ch ); |
---|
| 172 | |
---|
| 173 | } |
---|
| 174 | |
---|
| 175 | /* |
---|
| 176 | * __read -- read bytes from the serial port. Ignore fd, since |
---|
| 177 | * we only have stdin. |
---|
| 178 | */ |
---|
| 179 | |
---|
| 180 | int __read( |
---|
| 181 | int fd, |
---|
| 182 | char *buf, |
---|
| 183 | int nbytes |
---|
| 184 | ) |
---|
| 185 | { |
---|
| 186 | int i = 0; |
---|
| 187 | |
---|
| 188 | for (i = 0; i < nbytes; i++) { |
---|
| 189 | *(buf + i) = inbyte(); |
---|
| 190 | if ((*(buf + i) == '\n') || (*(buf + i) == '\r')) { |
---|
| 191 | (*(buf + i++)) = '\n'; |
---|
| 192 | (*(buf + i)) = 0; |
---|
| 193 | break; |
---|
| 194 | } |
---|
| 195 | } |
---|
| 196 | return (i); |
---|
| 197 | } |
---|
| 198 | |
---|
| 199 | /* |
---|
| 200 | * __write -- write bytes to the serial port. Ignore fd, since |
---|
| 201 | * stdout and stderr are the same. Since we have no filesystem, |
---|
| 202 | * open will only return an error. |
---|
| 203 | */ |
---|
| 204 | |
---|
| 205 | int __write( |
---|
| 206 | int fd, |
---|
| 207 | char *buf, |
---|
| 208 | int nbytes |
---|
| 209 | ) |
---|
| 210 | { |
---|
| 211 | int i; |
---|
| 212 | |
---|
| 213 | for (i = 0; i < nbytes; i++) { |
---|
| 214 | if (*(buf + i) == '\n') { |
---|
| 215 | outbyte ('\r'); |
---|
| 216 | } |
---|
| 217 | outbyte (*(buf + i)); |
---|
| 218 | } |
---|
| 219 | return (nbytes); |
---|
| 220 | } |
---|