Subversion Repositories HelenOS-historic

Rev

Rev 588 | Go to most recent revision | Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
575 palkovsky 1
/*
2
 * Copyright (C) 2005 Ondrej Palkovsky
3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
#include <interrupt.h>
30
#include <console/chardev.h>
31
#include <arch/drivers/msim.h>
32
#include <arch/cp0.h>
33
 
34
static chardev_t console;
35
 
36
static void msim_write(chardev_t *dev, const char ch);
37
static void msim_enable(chardev_t *dev);
38
static void msim_disable(chardev_t *dev);
39
 
40
static chardev_operations_t msim_ops = {
41
    .resume = msim_enable,
42
    .suspend = msim_disable,
43
    .write = msim_write
44
};
45
 
46
/** Putchar that works with MSIM & gxemul */
47
void msim_write(chardev_t *dev, const char ch)
48
{
49
    *((char *) MSIM_VIDEORAM) = ch;
50
}
51
 
52
/* Called from getc(). */
53
void msim_enable(chardev_t *dev)
54
{
55
    cp0_unmask_int(MSIM_KBD_IRQ);
56
}
57
 
58
/* Called from getc(). */
59
void msim_disable(chardev_t *dev)
60
{
61
    cp0_mask_int(MSIM_KBD_IRQ);
62
}
63
 
64
/** Process keyboard interrupt. */
65
static void msim_interrupt(int n, void *stack)
66
{
67
    char ch;
68
 
69
    ch = *((char *) MSIM_KBD_ADDRESS);
70
    if (ch =='\r')
71
        ch = '\n';
72
    chardev_push_character(&console, ch);
73
}
74
 
75
 
76
/* Return console object representing msim console */
77
chardev_t * msim_console(void)
78
{
79
    chardev_initialize("msim_console", &console, &msim_ops);
80
 
81
    exc_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt);
82
 
83
    cp0_unmask_int(MSIM_KBD_IRQ);
84
 
85
    return &console;
86
}