WebSVN – HelenOS – Diff – /branches/dynload/kernel/arch/ia64/src/drivers/ega.c


/*
 * Copyright (c) 2001-2004 Jakub Jermar
 * 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 ia32   
 * @{
 */
/**
 * @file
 * @brief EGA driver.
 */
 
#include <putchar.h>
#include <mm/page.h>
#include <mm/as.h>
#include <arch/mm/page.h>
#include <synch/spinlock.h>
#include <arch/types.h>
#include <arch/asm.h>
#include <memstr.h>
#include <console/chardev.h>
#include <console/console.h>
#include <sysinfo/sysinfo.h>
#include <arch/drivers/ega.h>
 
/*
 * The EGA driver.
 * Simple and short. Function for displaying characters and "scrolling".
 */
 
SPINLOCK_INITIALIZE(egalock);
static uint32_t ega_cursor;
static uint8_t *videoram;
 
static void ega_putchar(chardev_t *d, const char ch);
 
chardev_t ega_console;
static chardev_operations_t ega_ops = {
    .write = ega_putchar
};
 
 
void ega_init(void)
{
    videoram = (uint8_t *) (VIDEORAM);
 
    /*
     * Clear the screen.
     */
    _memsetw(videoram, SCREEN, 0x0720);
 
    chardev_initialize("ega_out", &ega_console, &ega_ops);
    stdout = &ega_console;
   
    sysinfo_set_item_val("fb", NULL, true);
    sysinfo_set_item_val("fb.kind", NULL, 2);
    sysinfo_set_item_val("fb.width", NULL, ROW);
    sysinfo_set_item_val("fb.height", NULL, ROWS);
    sysinfo_set_item_val("fb.address.physical", NULL, VIDEORAM);
   
#ifndef CONFIG_FB
    putchar('\n');
#endif  
}
 
static void ega_display_char(char ch)
{
    videoram[ega_cursor * 2] = ch;
    videoram[ega_cursor * 2 + 1] = 7;
}
 
/*
 * This function takes care of scrolling.
 */
static void ega_check_cursor(void)
{
    if (ega_cursor < SCREEN)
        return;
 
    memcpy((void *) videoram, (void *) (videoram + ROW * 2), (SCREEN - ROW) * 2);
    _memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720);
    ega_cursor = ega_cursor - ROW;
}
 
void ega_putchar(chardev_t *d, const char ch)
{
    ipl_t ipl;
 
    ipl = interrupts_disable();
    spinlock_lock(&egalock);
 
    switch (ch) {
    case '\n':
        ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;
        break;
    case '\t':
        ega_cursor = (ega_cursor + 8) - ega_cursor % 8;
        break;
    case '\b':
        if (ega_cursor % ROW)
            ega_cursor--;
        break;
    default:
        ega_display_char(ch);
        ega_cursor++;
        break;
    }
    ega_check_cursor();
 
    spinlock_unlock(&egalock);
    interrupts_restore(ipl);
}
 
/** @}
 */
 

Rev 2927	Rev 3153
1	/*	1	/*
2	* Copyright (c) 2001-2004 Jakub Jermar	2	* Copyright (c) 2001-2004 Jakub Jermar
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 ia32	29	/** @addtogroup ia32
30	* @{	30	* @{
31	*/	31	*/
32	/**	32	/**
33	* @file	33	* @file
34	* @brief EGA driver.	34	* @brief EGA driver.
35	*/	35	*/
36		36
37	#include <putchar.h>	37	#include <putchar.h>
38	#include <mm/page.h>	38	#include <mm/page.h>
39	#include <mm/as.h>	39	#include <mm/as.h>
40	#include <arch/mm/page.h>	40	#include <arch/mm/page.h>
41	#include <synch/spinlock.h>	41	#include <synch/spinlock.h>
42	#include <arch/types.h>	42	#include <arch/types.h>
43	#include <arch/asm.h>	43	#include <arch/asm.h>
44	#include <memstr.h>	44	#include <memstr.h>
45	#include <console/chardev.h>	45	#include <console/chardev.h>
46	#include <console/console.h>	46	#include <console/console.h>
47	#include <sysinfo/sysinfo.h>	47	#include <sysinfo/sysinfo.h>
48	#include <arch/drivers/ega.h>	48	#include <arch/drivers/ega.h>
49		49
50	/*	50	/*
51	* The EGA driver.	51	* The EGA driver.
52	* Simple and short. Function for displaying characters and "scrolling".	52	* Simple and short. Function for displaying characters and "scrolling".
53	*/	53	*/
54		54
55	SPINLOCK_INITIALIZE(egalock);	55	SPINLOCK_INITIALIZE(egalock);
56	static uint32_t ega_cursor;	56	static uint32_t ega_cursor;
57	static uint8_t *videoram;	57	static uint8_t *videoram;
58		58
59	static void ega_putchar(chardev_t *d, const char ch);	59	static void ega_putchar(chardev_t *d, const char ch);
60		60
61	chardev_t ega_console;	61	chardev_t ega_console;
62	static chardev_operations_t ega_ops = {	62	static chardev_operations_t ega_ops = {
63	.write = ega_putchar	63	.write = ega_putchar
64	};	64	};
65		65
66		66
67	void ega_init(void)	67	void ega_init(void)
68	{	68	{
69	videoram = (uint8_t *) (VIDEORAM);	69	videoram = (uint8_t *) (VIDEORAM);
70		70
71	/*	71	/*
72	* Clear the screen.	72	* Clear the screen.
73	*/	73	*/
74	_memsetw((uintptr_t) videoram, SCREEN, 0x0720);	74	_memsetw(videoram, SCREEN, 0x0720);
75		75
76	chardev_initialize("ega_out", &ega_console, &ega_ops);	76	chardev_initialize("ega_out", &ega_console, &ega_ops);
77	stdout = &ega_console;	77	stdout = &ega_console;
78		78
79	sysinfo_set_item_val("fb", NULL, true);	79	sysinfo_set_item_val("fb", NULL, true);
80	sysinfo_set_item_val("fb.kind", NULL, 2);	80	sysinfo_set_item_val("fb.kind", NULL, 2);
81	sysinfo_set_item_val("fb.width", NULL, ROW);	81	sysinfo_set_item_val("fb.width", NULL, ROW);
82	sysinfo_set_item_val("fb.height", NULL, ROWS);	82	sysinfo_set_item_val("fb.height", NULL, ROWS);
83	sysinfo_set_item_val("fb.address.physical", NULL, VIDEORAM);	83	sysinfo_set_item_val("fb.address.physical", NULL, VIDEORAM);
84		84
85	#ifndef CONFIG_FB	85	#ifndef CONFIG_FB
86	putchar('\n');	86	putchar('\n');
87	#endif	87	#endif
88	}	88	}
89		89
90	static void ega_display_char(char ch)	90	static void ega_display_char(char ch)
91	{	91	{
92	videoram[ega_cursor * 2] = ch;	92	videoram[ega_cursor * 2] = ch;
93	videoram[ega_cursor * 2 + 1] = 7;	93	videoram[ega_cursor * 2 + 1] = 7;
94	}	94	}
95		95
96	/*	96	/*
97	* This function takes care of scrolling.	97	* This function takes care of scrolling.
98	*/	98	*/
99	static void ega_check_cursor(void)	99	static void ega_check_cursor(void)
100	{	100	{
101	if (ega_cursor < SCREEN)	101	if (ega_cursor < SCREEN)
102	return;	102	return;
103		103
104	memcpy((void ) videoram, (void ) (videoram + ROW * 2), (SCREEN - ROW) * 2);	104	memcpy((void ) videoram, (void ) (videoram + ROW * 2), (SCREEN - ROW) * 2);
105	_memsetw((uintptr_t) (videoram + (SCREEN - ROW) * 2), ROW, 0x0720);	105	_memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720);
106	ega_cursor = ega_cursor - ROW;	106	ega_cursor = ega_cursor - ROW;
107	}	107	}
108		108
109	void ega_putchar(chardev_t *d, const char ch)	109	void ega_putchar(chardev_t *d, const char ch)
110	{	110	{
111	ipl_t ipl;	111	ipl_t ipl;
112		112
113	ipl = interrupts_disable();	113	ipl = interrupts_disable();
114	spinlock_lock(&egalock);	114	spinlock_lock(&egalock);
115		115
116	switch (ch) {	116	switch (ch) {
117	case '\n':	117	case '\n':
118	ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;	118	ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;
119	break;	119	break;
120	case '\t':	120	case '\t':
121	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;	121	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;
122	break;	122	break;
123	case '\b':	123	case '\b':
124	if (ega_cursor % ROW)	124	if (ega_cursor % ROW)
125	ega_cursor--;	125	ega_cursor--;
126	break;	126	break;
127	default:	127	default:
128	ega_display_char(ch);	128	ega_display_char(ch);
129	ega_cursor++;	129	ega_cursor++;
130	break;	130	break;
131	}	131	}
132	ega_check_cursor();	132	ega_check_cursor();
133		133
134	spinlock_unlock(&egalock);	134	spinlock_unlock(&egalock);
135	interrupts_restore(ipl);	135	interrupts_restore(ipl);
136	}	136	}
137		137
138	/** @}	138	/** @}
139	*/	139	*/
140		140

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(root)/branches/dynload/kernel/arch/ia64/src/drivers/ega.c @ 3674 – Rev 2927 → 3153