forked from Imagelibrary/rtems
105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
/*
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* Copyright (c) 2015 University of York.
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* Hesham ALMatary <hmka501@york.ac.uk>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <bsp.h>
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#include <bsp/console-polled.h>
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#include <rtems/libio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <stdio.h>
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static void outbyte_console( char );
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static char inbyte_console( void );
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void console_initialize_hardware(void)
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{
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/* Do nothing */
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}
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/* Epiphany simulator would handle this system call */
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static void outbyte_console(char c)
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{
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register int chan asm("r0") = STDOUT_FILENO;
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register void* addr asm("r1") = &c;
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register int len asm("r2") = 1;
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/* Invoke write system call to be handled by Epiphany simulator */
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__asm__ __volatile__ ("trap 0" : : "r" (chan), "r" (addr), "r" (len));
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}
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static char inbyte_console(void)
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{
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char c;
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register int chan asm("r0") = STDIN_FILENO;
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register void* addr asm("r1") = &c;
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register int len asm("r2") = 1;
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/* Invoke read system call to be handled by Epiphany simulator */
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asm ("trap 1" :: "r" (chan), "r" (addr), "r" (len));
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return c;
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}
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/*
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* console_outbyte_polled
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*
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* This routine transmits a character using polling.
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*/
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void console_outbyte_polled(
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int port,
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char ch
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)
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{
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outbyte_console( ch );
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}
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/*
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* console_inbyte_nonblocking
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*
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* This routine polls for a character.
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*/
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int console_inbyte_nonblocking(int port)
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{
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char c;
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c = inbyte_console();
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if (!c)
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return -1;
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return (int) c;
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}
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/*
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* To support printk
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*/
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#include <rtems/bspIo.h>
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static void Epiphany_output_char(char c) { console_outbyte_polled( 0, c ); }
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BSP_output_char_function_type BSP_output_char = Epiphany_output_char;
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BSP_polling_getchar_function_type BSP_poll_char =
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(void *)console_inbyte_nonblocking;
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