Subversion Repositories HelenOS-historic

Rev

Rev 1702 | Details | Compare with Previous | 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
 
1702 cejka 29
 /** @addtogroup mips32
30
 * @{
31
 */
32
/** @file
33
 */
34
 
575 palkovsky 35
#include <interrupt.h>
36
#include <console/chardev.h>
37
#include <arch/drivers/msim.h>
38
#include <arch/cp0.h>
606 palkovsky 39
#include <console/console.h>
575 palkovsky 40
 
41
static chardev_t console;
42
 
43
static void msim_write(chardev_t *dev, const char ch);
44
static void msim_enable(chardev_t *dev);
45
static void msim_disable(chardev_t *dev);
607 palkovsky 46
static char msim_do_read(chardev_t *dev);
575 palkovsky 47
 
48
static chardev_operations_t msim_ops = {
49
    .resume = msim_enable,
50
    .suspend = msim_disable,
607 palkovsky 51
    .write = msim_write,
52
    .read = msim_do_read,
575 palkovsky 53
};
54
 
55
/** Putchar that works with MSIM & gxemul */
56
void msim_write(chardev_t *dev, const char ch)
57
{
58
    *((char *) MSIM_VIDEORAM) = ch;
59
}
60
 
61
/* Called from getc(). */
62
void msim_enable(chardev_t *dev)
63
{
64
    cp0_unmask_int(MSIM_KBD_IRQ);
65
}
66
 
67
/* Called from getc(). */
68
void msim_disable(chardev_t *dev)
69
{
70
    cp0_mask_int(MSIM_KBD_IRQ);
71
}
72
 
588 palkovsky 73
#include <print.h>
607 palkovsky 74
/** Read character using polling, assume interrupts disabled */
75
static char msim_do_read(chardev_t *dev)
76
{
77
    char ch;
78
 
79
    while (1) {
80
        ch = *((volatile char *) MSIM_KBD_ADDRESS);
81
        if (ch) {
82
            if (ch == '\r')
83
                return '\n';
84
            if (ch == 0x7f)
85
                return '\b';
86
            return ch;
87
        }
88
    }
89
}
90
 
575 palkovsky 91
/** Process keyboard interrupt. */
958 jermar 92
static void msim_interrupt(int n, istate_t *istate)
575 palkovsky 93
{
607 palkovsky 94
    char ch = 0;
575 palkovsky 95
 
96
    ch = *((char *) MSIM_KBD_ADDRESS);
97
    if (ch =='\r')
98
        ch = '\n';
588 palkovsky 99
    if (ch == 0x7f)
100
        ch = '\b';
575 palkovsky 101
    chardev_push_character(&console, ch);
102
}
103
 
104
 
105
/* Return console object representing msim console */
606 palkovsky 106
void msim_console(void)
575 palkovsky 107
{
108
    chardev_initialize("msim_console", &console, &msim_ops);
109
 
590 palkovsky 110
    int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt);
575 palkovsky 111
 
112
    cp0_unmask_int(MSIM_KBD_IRQ);
113
 
606 palkovsky 114
    stdin = &console;
115
    stdout = &console;
575 palkovsky 116
}
1474 palkovsky 117
 
118
static iroutine oldvector;
119
void msim_kbd_grab(void)
120
{
121
    oldvector = int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt);
122
}
123
void msim_kbd_release(void)
124
{
1741 palkovsky 125
    if (oldvector)
126
        int_register(MSIM_KBD_IRQ, "user_interrupt", oldvector);
1474 palkovsky 127
}
1702 cejka 128
 
129
 /** @}
130
 */
131