qemuppc/console/console-io.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  *  This file contains the hardware specific portions of the TTY driver
0005  *  for the serial ports on the qemuppc.
0006  */
0007
0008 /*
0009  *  COPYRIGHT (c) 1989-2008.
0010  *  On-Line Applications Research Corporation (OAR).
0011  *
0012  * Redistribution and use in source and binary forms, with or without
0013  * modification, are permitted provided that the following conditions
0014  * are met:
0015  * 1. Redistributions of source code must retain the above copyright
0016  *    notice, this list of conditions and the following disclaimer.
0017  * 2. Redistributions in binary form must reproduce the above copyright
0018  *    notice, this list of conditions and the following disclaimer in the
0019  *    documentation and/or other materials provided with the distribution.
0020  *
0021  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0022  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0023  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0024  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0025  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0026  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0027  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0028  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0029  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0030  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0031  * POSSIBILITY OF SUCH DAMAGE.
0032  */
0033
0034 #include <bsp.h>
0035 #include <bsp/console-polled.h>
0036 #include <rtems/libio.h>
0037 #include <stdlib.h>
0038 #include <assert.h>
0039
0040 static void
0041 __outb(int port, unsigned char v)
0042 {
0043   *((volatile unsigned char *)(0x80000000 + port)) = v;
0044 }
0045
0046 static unsigned char
0047 __inb(int port)
0048 {
0049   return *((volatile unsigned char *)(0x80000000 + port));
0050 }
0051
0052 /*
0053  *  console_initialize_hardware
0054  *
0055  *  This routine initializes the console hardware.
0056  *
0057  */
0058 void console_initialize_hardware(void)
0059 {
0060   return;
0061 }
0062
0063 /*
0064  *  console_outbyte_polled
0065  *
0066  *  This routine transmits a character using polling.
0067  */
0068 void console_outbyte_polled(
0069   int  port,
0070   char ch
0071 )
0072 {
0073   __outb(0x3f8 + 0x00, ch);
0074 }
0075
0076 /*
0077  *  console_inbyte_nonblocking
0078  *
0079  *  This routine polls for a character.
0080  */
0081 int console_inbyte_nonblocking(
0082   int port
0083 )
0084 {
0085
0086   if ( __inb(0x3f8 + 0x05) & 0x01 )
0087     return __inb(0x3f8 + 0x00);
0088   return -1;
0089 }
0090
0091 #include <rtems/bspIo.h>
0092
0093 static void simBSP_output_char(char c) { console_outbyte_polled( 0, c ); }
0094
0095 BSP_output_char_function_type           BSP_output_char = simBSP_output_char;
0096 BSP_polling_getchar_function_type       BSP_poll_char = NULL;