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/*
* Copyright (C) 2005 Ondrej Palkovsky
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <interrupt.h>
#include <console/chardev.h>
#include <arch/drivers/msim.h>
#include <arch/cp0.h>
static chardev_t console;
static void msim_write(chardev_t *dev, const char ch);
static void msim_enable(chardev_t *dev);
static void msim_disable(chardev_t *dev);
static chardev_operations_t msim_ops = {
.resume = msim_enable,
.suspend = msim_disable,
.write = msim_write
};
/** Putchar that works with MSIM & gxemul */
void msim_write(chardev_t *dev, const char ch)
{
*((char *) MSIM_VIDEORAM) = ch;
}
/* Called from getc(). */
void msim_enable(chardev_t *dev)
{
cp0_unmask_int(MSIM_KBD_IRQ);
}
/* Called from getc(). */
void msim_disable(chardev_t *dev)
{
cp0_mask_int(MSIM_KBD_IRQ);
}
#include <print.h>
/** Process keyboard interrupt. */
static void msim_interrupt(int n, void *stack)
{
char ch;
ch = *((char *) MSIM_KBD_ADDRESS);
if (ch =='\r')
ch = '\n';
if (ch == 0x7f)
ch = '\b';
chardev_push_character(&console, ch);
}
/* Return console object representing msim console */
chardev_t * msim_console(void)
{
chardev_initialize("msim_console", &console, &msim_ops);
exc_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt);
cp0_unmask_int(MSIM_KBD_IRQ);
return &console;
}