shsim/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 simulators stdin/out.
0006  */
0007
0008 /*
0009  *  COPYRIGHT (c) 1989-2011.
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 #include <bsp/syscall.h>
0041
0042 /*
0043  *  console_initialize_hardware
0044  *
0045  *  This routine initializes the console hardware.
0046  */
0047 void console_initialize_hardware(void)
0048 {
0049 }
0050
0051 /*
0052  *  console_outbyte_polled
0053  *
0054  *  This routine transmits a character using polling.
0055  */
0056 void console_outbyte_polled(
0057   int  port,
0058   char ch
0059 )
0060 {
0061   __trap34 (SYS_write, 1, &ch, 1);
0062 }
0063
0064 /*
0065  *  console_inbyte_nonblocking
0066  *
0067  *  This routine polls for a character.
0068  */
0069 int console_inbyte_nonblocking(
0070   int port
0071 )
0072 {
0073   unsigned char c;
0074
0075   return __trap34 (SYS_read, 0, &c, 1);
0076 }