WebSVN – HelenOS – Diff – /trunk/kernel/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 <mm/slab.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 <ddi/ddi.h>
 
/*
 * The EGA driver.
 * Simple and short. Function for displaying characters and "scrolling".
 */
 
static parea_t ega_parea;   /**< Physical memory area for EGA video RAM. */
 
SPINLOCK_INITIALIZE(egalock);
static uint32_t ega_cursor;
static uint8_t *videoram;
static uint8_t *backbuf;
 
static void ega_putchar(chardev_t *d, const char ch);
 
chardev_t ega_console;
static chardev_operations_t ega_ops = {
    .write = ega_putchar
};
 
static void ega_move_cursor(void);
 
void ega_init(void)
{
    uint8_t hi, lo;
 
    backbuf = (uint8_t *) malloc(SCREEN * 2, 0);
    if (!backbuf)
        panic("Unable to allocate backbuffer.\n");
   
    videoram = (uint8_t *) 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;
   
    ega_parea.pbase = VIDEORAM;
    ega_parea.vbase = (uintptr_t) videoram;
    ega_parea.frames = 1;
    ega_parea.cacheable = false;
    ddi_parea_register(&ega_parea);
 
    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);
}
 
static void ega_display_char(char ch)
{
    videoram[ega_cursor * 2] = ch;
    backbuf[ega_cursor * 2] = ch;
}
 
/*
 * This function takes care of scrolling.
 */
static void ega_check_cursor(void)
{
    if (ega_cursor < SCREEN)
        return;
 
    memmove((void *) videoram, (void *) (videoram + ROW * 2), (SCREEN - ROW) * 2);
    memmove((void *) backbuf, (void *) (backbuf + ROW * 2), (SCREEN - ROW) * 2);
    memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720);
    memsetw(backbuf + (SCREEN - ROW) * 2, ROW, 0x0720);
    ega_cursor = ega_cursor - ROW;
}
 
void ega_putchar(chardev_t *d __attribute__((unused)), 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, (uint8_t) ((ega_cursor >> 8) & 0xff));
    outb(0x3d4, 0xf);
    outb(0x3d5, (uint8_t) (ega_cursor & 0xff));
}
 
void ega_redraw(void)
{
    memcpy(videoram, backbuf, SCREEN * 2);
    ega_move_cursor();
}
 
/** @}
 */
 

Rev 3234	Rev 3751
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 <arch/drivers/ega.h>	37	#include <arch/drivers/ega.h>
38	#include <putchar.h>	38	#include <putchar.h>
39	#include <mm/page.h>	39	#include <mm/page.h>
40	#include <mm/as.h>	40	#include <mm/as.h>
-		41	#include <mm/slab.h>
41	#include <arch/mm/page.h>	42	#include <arch/mm/page.h>
42	#include <synch/spinlock.h>	43	#include <synch/spinlock.h>
43	#include <arch/types.h>	44	#include <arch/types.h>
44	#include <arch/asm.h>	45	#include <arch/asm.h>
45	#include <memstr.h>	46	#include <memstr.h>
46	#include <console/chardev.h>	47	#include <console/chardev.h>
47	#include <console/console.h>	48	#include <console/console.h>
48	#include <sysinfo/sysinfo.h>	49	#include <sysinfo/sysinfo.h>
49	#include <ddi/ddi.h>	50	#include <ddi/ddi.h>
50		51
51	/*	52	/*
52	* The EGA driver.	53	* The EGA driver.
53	* Simple and short. Function for displaying characters and "scrolling".	54	* Simple and short. Function for displaying characters and "scrolling".
54	*/	55	*/
55		56
56	static parea_t ega_parea; /*< Physical memory area for EGA video RAM. /	57	static parea_t ega_parea; /*< Physical memory area for EGA video RAM. /
57		58
58	SPINLOCK_INITIALIZE(egalock);	59	SPINLOCK_INITIALIZE(egalock);
59	static uint32_t ega_cursor;	60	static uint32_t ega_cursor;
60	static uint8_t *videoram;	61	static uint8_t *videoram;
-		62	static uint8_t *backbuf;
61		63
62	static void ega_putchar(chardev_t *d, const char ch);	64	static void ega_putchar(chardev_t *d, const char ch);
63		65
64	chardev_t ega_console;	66	chardev_t ega_console;
65	static chardev_operations_t ega_ops = {	67	static chardev_operations_t ega_ops = {
66	.write = ega_putchar	68	.write = ega_putchar
67	};	69	};
68		70
69	static void ega_move_cursor(void);	71	static void ega_move_cursor(void);
70		72
71	void ega_init(void)	73	void ega_init(void)
72	{	74	{
73	uint8_t hi, lo;	75	uint8_t hi, lo;
-		76
-		77	backbuf = (uint8_t ) malloc(SCREEN 2, 0);
-		78	if (!backbuf)
-		79	panic("Unable to allocate backbuffer.\n");
74		80
75	videoram = (uint8_t ) hw_map(VIDEORAM, SCREEN 2);	81	videoram = (uint8_t ) hw_map(VIDEORAM, SCREEN 2);
76	outb(0x3d4, 0xe);	82	outb(0x3d4, 0xe);
77	hi = inb(0x3d5);	83	hi = inb(0x3d5);
78	outb(0x3d4, 0xf);	84	outb(0x3d4, 0xf);
79	lo = inb(0x3d5);	85	lo = inb(0x3d5);
80	ega_cursor = (hi << 8) \| lo;	86	ega_cursor = (hi << 8) \| lo;
81		87
82	chardev_initialize("ega_out", &ega_console, &ega_ops);	88	chardev_initialize("ega_out", &ega_console, &ega_ops);
83	stdout = &ega_console;	89	stdout = &ega_console;
84		90
85	ega_parea.pbase = VIDEORAM;	91	ega_parea.pbase = VIDEORAM;
86	ega_parea.vbase = (uintptr_t) videoram;	92	ega_parea.vbase = (uintptr_t) videoram;
87	ega_parea.frames = 1;	93	ega_parea.frames = 1;
88	ega_parea.cacheable = false;	94	ega_parea.cacheable = false;
89	ddi_parea_register(&ega_parea);	95	ddi_parea_register(&ega_parea);
90		96
91	sysinfo_set_item_val("fb", NULL, true);	97	sysinfo_set_item_val("fb", NULL, true);
92	sysinfo_set_item_val("fb.kind", NULL, 2);	98	sysinfo_set_item_val("fb.kind", NULL, 2);
93	sysinfo_set_item_val("fb.width", NULL, ROW);	99	sysinfo_set_item_val("fb.width", NULL, ROW);
94	sysinfo_set_item_val("fb.height", NULL, ROWS);	100	sysinfo_set_item_val("fb.height", NULL, ROWS);
95	sysinfo_set_item_val("fb.address.physical", NULL, VIDEORAM);	101	sysinfo_set_item_val("fb.address.physical", NULL, VIDEORAM);
96	}	102	}
97		103
98	static void ega_display_char(char ch)	104	static void ega_display_char(char ch)
99	{	105	{
100	videoram[ega_cursor * 2] = ch;	106	videoram[ega_cursor * 2] = ch;
-		107	backbuf[ega_cursor * 2] = ch;
101	}	108	}
102		109
103	/*	110	/*
104	* This function takes care of scrolling.	111	* This function takes care of scrolling.
105	*/	112	*/
106	static void ega_check_cursor(void)	113	static void ega_check_cursor(void)
107	{	114	{
108	if (ega_cursor < SCREEN)	115	if (ega_cursor < SCREEN)
109	return;	116	return;
110		117
111	memcpy((void ) videoram, (void ) (videoram + ROW * 2), (SCREEN - ROW) * 2);	118	memmove((void ) videoram, (void ) (videoram + ROW * 2), (SCREEN - ROW) * 2);
-		119	memmove((void ) backbuf, (void ) (backbuf + ROW * 2), (SCREEN - ROW) * 2);
112	memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720);	120	memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720);
-		121	memsetw(backbuf + (SCREEN - ROW) * 2, ROW, 0x0720);
113	ega_cursor = ega_cursor - ROW;	122	ega_cursor = ega_cursor - ROW;
114	}	123	}
115		124
116	void ega_putchar(chardev_t *d __attribute__((unused)), const char ch)	125	void ega_putchar(chardev_t *d __attribute__((unused)), const char ch)
117	{	126	{
118	ipl_t ipl;	127	ipl_t ipl;
119		128
120	ipl = interrupts_disable();	129	ipl = interrupts_disable();
121	spinlock_lock(&egalock);	130	spinlock_lock(&egalock);
122		131
123	switch (ch) {	132	switch (ch) {
124	case '\n':	133	case '\n':
125	ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;	134	ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;
126	break;	135	break;
127	case '\t':	136	case '\t':
128	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;	137	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;
129	break;	138	break;
130	case '\b':	139	case '\b':
131	if (ega_cursor % ROW)	140	if (ega_cursor % ROW)
132	ega_cursor--;	141	ega_cursor--;
133	break;	142	break;
134	default:	143	default:
135	ega_display_char(ch);	144	ega_display_char(ch);
136	ega_cursor++;	145	ega_cursor++;
137	break;	146	break;
138	}	147	}
139	ega_check_cursor();	148	ega_check_cursor();
140	ega_move_cursor();	149	ega_move_cursor();
141		150
142	spinlock_unlock(&egalock);	151	spinlock_unlock(&egalock);
143	interrupts_restore(ipl);	152	interrupts_restore(ipl);
144	}	153	}
145		154
146	void ega_move_cursor(void)	155	void ega_move_cursor(void)
147	{	156	{
148	outb(0x3d4, 0xe);	157	outb(0x3d4, 0xe);
149	outb(0x3d5, (uint8_t) ((ega_cursor >> 8) & 0xff));	158	outb(0x3d5, (uint8_t) ((ega_cursor >> 8) & 0xff));
150	outb(0x3d4, 0xf);	159	outb(0x3d4, 0xf);
151	outb(0x3d5, (uint8_t) (ega_cursor & 0xff));	160	outb(0x3d5, (uint8_t) (ega_cursor & 0xff));
152	}	161	}
-		162
-		163	void ega_redraw(void)
-		164	{
-		165	memcpy(videoram, backbuf, SCREEN * 2);
-		166	ega_move_cursor();
-		167	}
153		168
154	/** @}	169	/** @}
155	*/	170	*/
156		171

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(root)/trunk/kernel/arch/ia32/src/drivers/ega.c – Rev 3234 → 3751