WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/mips32/src/drivers/msim.c


/*
 * 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.
 */
 
 /** @addtogroup mips32
 * @{
 */
/** @file
 */
 
#include <interrupt.h>
#include <console/chardev.h>
#include <arch/drivers/msim.h>
#include <arch/cp0.h>
#include <console/console.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 char msim_do_read(chardev_t *dev);
 
static chardev_operations_t msim_ops = {
    .resume = msim_enable,
    .suspend = msim_disable,
    .write = msim_write,
    .read = msim_do_read,
};
 
/** 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>
/** Read character using polling, assume interrupts disabled */
static char msim_do_read(chardev_t *dev)
{
    char ch;
 
    while (1) {
        ch = *((volatile char *) MSIM_KBD_ADDRESS);
        if (ch) {
            if (ch == '\r')
                return '\n';
            if (ch == 0x7f)
                return '\b';
            return ch;
        }
    }
}
 
/** Process keyboard interrupt. */
static void msim_interrupt(int n, istate_t *istate)
{
    char ch = 0;
 
    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 */
void msim_console(void)
{
    chardev_initialize("msim_console", &console, &msim_ops);
 
    int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt);
 
    cp0_unmask_int(MSIM_KBD_IRQ);
 
    stdin = &console;
    stdout = &console;
}
 
static iroutine oldvector;
void msim_kbd_grab(void)
{
    oldvector = int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt);
}
void msim_kbd_release(void)
{
    if (oldvector)
        int_register(MSIM_KBD_IRQ, "user_interrupt", oldvector);
}
 
 /** @}
 */
 
 

Rev 1702	Rev 1741
1	/*	1	/*
2	* Copyright (C) 2005 Ondrej Palkovsky	2	* Copyright (C) 2005 Ondrej Palkovsky
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	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	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.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	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	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	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	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	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	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.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup mips32	29	/** @addtogroup mips32
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <interrupt.h>	35	#include <interrupt.h>
36	#include <console/chardev.h>	36	#include <console/chardev.h>
37	#include <arch/drivers/msim.h>	37	#include <arch/drivers/msim.h>
38	#include <arch/cp0.h>	38	#include <arch/cp0.h>
39	#include <console/console.h>	39	#include <console/console.h>
40		40
41	static chardev_t console;	41	static chardev_t console;
42		42
43	static void msim_write(chardev_t *dev, const char ch);	43	static void msim_write(chardev_t *dev, const char ch);
44	static void msim_enable(chardev_t *dev);	44	static void msim_enable(chardev_t *dev);
45	static void msim_disable(chardev_t *dev);	45	static void msim_disable(chardev_t *dev);
46	static char msim_do_read(chardev_t *dev);	46	static char msim_do_read(chardev_t *dev);
47		47
48	static chardev_operations_t msim_ops = {	48	static chardev_operations_t msim_ops = {
49	.resume = msim_enable,	49	.resume = msim_enable,
50	.suspend = msim_disable,	50	.suspend = msim_disable,
51	.write = msim_write,	51	.write = msim_write,
52	.read = msim_do_read,	52	.read = msim_do_read,
53	};	53	};
54		54
55	/** Putchar that works with MSIM & gxemul */	55	/** Putchar that works with MSIM & gxemul */
56	void msim_write(chardev_t *dev, const char ch)	56	void msim_write(chardev_t *dev, const char ch)
57	{	57	{
58	((char ) MSIM_VIDEORAM) = ch;	58	((char ) MSIM_VIDEORAM) = ch;
59	}	59	}
60		60
61	/* Called from getc(). */	61	/* Called from getc(). */
62	void msim_enable(chardev_t *dev)	62	void msim_enable(chardev_t *dev)
63	{	63	{
64	cp0_unmask_int(MSIM_KBD_IRQ);	64	cp0_unmask_int(MSIM_KBD_IRQ);
65	}	65	}
66		66
67	/* Called from getc(). */	67	/* Called from getc(). */
68	void msim_disable(chardev_t *dev)	68	void msim_disable(chardev_t *dev)
69	{	69	{
70	cp0_mask_int(MSIM_KBD_IRQ);	70	cp0_mask_int(MSIM_KBD_IRQ);
71	}	71	}
72		72
73	#include <print.h>	73	#include <print.h>
74	/** Read character using polling, assume interrupts disabled */	74	/** Read character using polling, assume interrupts disabled */
75	static char msim_do_read(chardev_t *dev)	75	static char msim_do_read(chardev_t *dev)
76	{	76	{
77	char ch;	77	char ch;
78		78
79	while (1) {	79	while (1) {
80	ch = ((volatile char ) MSIM_KBD_ADDRESS);	80	ch = ((volatile char ) MSIM_KBD_ADDRESS);
81	if (ch) {	81	if (ch) {
82	if (ch == '\r')	82	if (ch == '\r')
83	return '\n';	83	return '\n';
84	if (ch == 0x7f)	84	if (ch == 0x7f)
85	return '\b';	85	return '\b';
86	return ch;	86	return ch;
87	}	87	}
88	}	88	}
89	}	89	}
90		90
91	/** Process keyboard interrupt. */	91	/** Process keyboard interrupt. */
92	static void msim_interrupt(int n, istate_t *istate)	92	static void msim_interrupt(int n, istate_t *istate)
93	{	93	{
94	char ch = 0;	94	char ch = 0;
95		95
96	ch = ((char ) MSIM_KBD_ADDRESS);	96	ch = ((char ) MSIM_KBD_ADDRESS);
97	if (ch =='\r')	97	if (ch =='\r')
98	ch = '\n';	98	ch = '\n';
99	if (ch == 0x7f)	99	if (ch == 0x7f)
100	ch = '\b';	100	ch = '\b';
101	chardev_push_character(&console, ch);	101	chardev_push_character(&console, ch);
102	}	102	}
103		103
104		104
105	/* Return console object representing msim console */	105	/* Return console object representing msim console */
106	void msim_console(void)	106	void msim_console(void)
107	{	107	{
108	chardev_initialize("msim_console", &console, &msim_ops);	108	chardev_initialize("msim_console", &console, &msim_ops);
109		109
110	int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt);	110	int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt);
111		111
112	cp0_unmask_int(MSIM_KBD_IRQ);	112	cp0_unmask_int(MSIM_KBD_IRQ);
113		113
114	stdin = &console;	114	stdin = &console;
115	stdout = &console;	115	stdout = &console;
116	}	116	}
117		117
118	static iroutine oldvector;	118	static iroutine oldvector;
119	void msim_kbd_grab(void)	119	void msim_kbd_grab(void)
120	{	120	{
121	oldvector = int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt);	121	oldvector = int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt);
122	}	122	}
123	void msim_kbd_release(void)	123	void msim_kbd_release(void)
124	{	124	{
-		125	if (oldvector)
125	int_register(MSIM_KBD_IRQ, "user_interrupt", oldvector);	126	int_register(MSIM_KBD_IRQ, "user_interrupt", oldvector);
126	}	127	}
127		128
128	/** @}	129	/** @}
129	*/	130	*/
130		131
131		132

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/mips32/src/drivers/msim.c – Rev 1702 → 1741