WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/ia32/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 <arch/drivers/ega.h>
#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>
 
/*
 * The EGA driver.
 * Simple and short. Function for displaying characters and "scrolling".
 */
 
SPINLOCK_INITIALIZE(egalock);
static __u32 ega_cursor;
static __u8 *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_move_cursor(void);
 
void ega_init(void)
{
    __u8 hi, lo;
   
    videoram = (__u8 *) hw_map(VIDEORAM, SCREEN * 2);
    outb(0x3d4, 0xe);
    hi = inb(0x3d5);
    outb(0x3d4, 0xf);
    lo = inb(0x3d5);
    ega_cursor = (hi << 8) | lo;
 
    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;
}
 
/*
 * 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((__address) (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();
    ega_move_cursor();
 
    spinlock_unlock(&egalock);
    interrupts_restore(ipl);
}
 
void ega_move_cursor(void)
{
    outb(0x3d4, 0xe);
    outb(0x3d5, (ega_cursor >> 8) & 0xff);
    outb(0x3d4, 0xf);
    outb(0x3d5, ega_cursor & 0xff);
}
 
/** @}
 */
 
 

Rev 1702	Rev 1754
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	/** @file	33	* @file
-		34	* @brief EGA driver.
33	*/	35	*/
34		36
35	#include <arch/drivers/ega.h>	37	#include <arch/drivers/ega.h>
36	#include <putchar.h>	38	#include <putchar.h>
37	#include <mm/page.h>	39	#include <mm/page.h>
38	#include <mm/as.h>	40	#include <mm/as.h>
39	#include <arch/mm/page.h>	41	#include <arch/mm/page.h>
40	#include <synch/spinlock.h>	42	#include <synch/spinlock.h>
41	#include <arch/types.h>	43	#include <arch/types.h>
42	#include <arch/asm.h>	44	#include <arch/asm.h>
43	#include <memstr.h>	45	#include <memstr.h>
44	#include <console/chardev.h>	46	#include <console/chardev.h>
45	#include <console/console.h>	47	#include <console/console.h>
46	#include <sysinfo/sysinfo.h>	48	#include <sysinfo/sysinfo.h>
47		49
48	/*	50	/*
49	* The EGA driver.	51	* The EGA driver.
50	* Simple and short. Function for displaying characters and "scrolling".	52	* Simple and short. Function for displaying characters and "scrolling".
51	*/	53	*/
52		54
53	SPINLOCK_INITIALIZE(egalock);	55	SPINLOCK_INITIALIZE(egalock);
54	static __u32 ega_cursor;	56	static __u32 ega_cursor;
55	static __u8 *videoram;	57	static __u8 *videoram;
56		58
57	static void ega_putchar(chardev_t *d, const char ch);	59	static void ega_putchar(chardev_t *d, const char ch);
58		60
59	chardev_t ega_console;	61	chardev_t ega_console;
60	static chardev_operations_t ega_ops = {	62	static chardev_operations_t ega_ops = {
61	.write = ega_putchar	63	.write = ega_putchar
62	};	64	};
63		65
64	void ega_move_cursor(void);	66	void ega_move_cursor(void);
65		67
66	void ega_init(void)	68	void ega_init(void)
67	{	69	{
68	__u8 hi, lo;	70	__u8 hi, lo;
69		71
70	videoram = (__u8 ) hw_map(VIDEORAM, SCREEN 2);	72	videoram = (__u8 ) hw_map(VIDEORAM, SCREEN 2);
71	outb(0x3d4, 0xe);	73	outb(0x3d4, 0xe);
72	hi = inb(0x3d5);	74	hi = inb(0x3d5);
73	outb(0x3d4, 0xf);	75	outb(0x3d4, 0xf);
74	lo = inb(0x3d5);	76	lo = inb(0x3d5);
75	ega_cursor = (hi << 8) \| lo;	77	ega_cursor = (hi << 8) \| lo;
76		78
77	chardev_initialize("ega_out", &ega_console, &ega_ops);	79	chardev_initialize("ega_out", &ega_console, &ega_ops);
78	stdout = &ega_console;	80	stdout = &ega_console;
79		81
80	sysinfo_set_item_val("fb", NULL, true);	82	sysinfo_set_item_val("fb", NULL, true);
81	sysinfo_set_item_val("fb.kind", NULL, 2);	83	sysinfo_set_item_val("fb.kind", NULL, 2);
82	sysinfo_set_item_val("fb.width", NULL, ROW);	84	sysinfo_set_item_val("fb.width", NULL, ROW);
83	sysinfo_set_item_val("fb.height", NULL, ROWS);	85	sysinfo_set_item_val("fb.height", NULL, ROWS);
84	sysinfo_set_item_val("fb.address.physical", NULL, VIDEORAM);	86	sysinfo_set_item_val("fb.address.physical", NULL, VIDEORAM);
85		87
86	#ifndef CONFIG_FB	88	#ifndef CONFIG_FB
87	putchar('\n');	89	putchar('\n');
88	#endif	90	#endif
89	}	91	}
90		92
91	static void ega_display_char(char ch)	93	static void ega_display_char(char ch)
92	{	94	{
93	videoram[ega_cursor * 2] = ch;	95	videoram[ega_cursor * 2] = ch;
94	}	96	}
95		97
96	/*	98	/*
97	* This function takes care of scrolling.	99	* This function takes care of scrolling.
98	*/	100	*/
99	static void ega_check_cursor(void)	101	static void ega_check_cursor(void)
100	{	102	{
101	if (ega_cursor < SCREEN)	103	if (ega_cursor < SCREEN)
102	return;	104	return;
103		105
104	memcpy((void ) videoram, (void ) (videoram + ROW * 2), (SCREEN - ROW) * 2);	106	memcpy((void ) videoram, (void ) (videoram + ROW * 2), (SCREEN - ROW) * 2);
105	memsetw((__address) (videoram + (SCREEN - ROW) * 2), ROW, 0x0720);	107	memsetw((__address) (videoram + (SCREEN - ROW) * 2), ROW, 0x0720);
106	ega_cursor = ega_cursor - ROW;	108	ega_cursor = ega_cursor - ROW;
107	}	109	}
108		110
109	void ega_putchar(chardev_t *d, const char ch)	111	void ega_putchar(chardev_t *d, const char ch)
110	{	112	{
111	ipl_t ipl;	113	ipl_t ipl;
112		114
113	ipl = interrupts_disable();	115	ipl = interrupts_disable();
114	spinlock_lock(&egalock);	116	spinlock_lock(&egalock);
115		117
116	switch (ch) {	118	switch (ch) {
117	case '\n':	119	case '\n':
118	ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;	120	ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;
119	break;	121	break;
120	case '\t':	122	case '\t':
121	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;	123	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;
122	break;	124	break;
123	case '\b':	125	case '\b':
124	if (ega_cursor % ROW)	126	if (ega_cursor % ROW)
125	ega_cursor--;	127	ega_cursor--;
126	break;	128	break;
127	default:	129	default:
128	ega_display_char(ch);	130	ega_display_char(ch);
129	ega_cursor++;	131	ega_cursor++;
130	break;	132	break;
131	}	133	}
132	ega_check_cursor();	134	ega_check_cursor();
133	ega_move_cursor();	135	ega_move_cursor();
134		136
135	spinlock_unlock(&egalock);	137	spinlock_unlock(&egalock);
136	interrupts_restore(ipl);	138	interrupts_restore(ipl);
137	}	139	}
138		140
139	void ega_move_cursor(void)	141	void ega_move_cursor(void)
140	{	142	{
141	outb(0x3d4, 0xe);	143	outb(0x3d4, 0xe);
142	outb(0x3d5, (ega_cursor >> 8) & 0xff);	144	outb(0x3d5, (ega_cursor >> 8) & 0xff);
143	outb(0x3d4, 0xf);	145	outb(0x3d4, 0xf);
144	outb(0x3d5, ega_cursor & 0xff);	146	outb(0x3d5, ega_cursor & 0xff);
145	}	147	}
146		148
147	/** @}	149	/** @}
148	*/	150	*/
149		-
150		151

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ia32/src/drivers/ega.c – Rev 1702 → 1754