WebSVN – HelenOS – Diff – /trunk/kernel/genarch/src/drivers/ega/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 genarch_drivers
 * @{
 */
/**
 * @file
 * @brief EGA driver.
 */
 
#include <genarch/drivers/ega/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 ioport_t ega_base;
 
chardev_t ega_console;
 
/*
 * 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;
}
 
static void ega_move_cursor(void)
{
    pio_write_8(ega_base + EGA_INDEX_REG, 0xe);
    pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff));
    pio_write_8(ega_base + EGA_INDEX_REG, 0xf);
    pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff));   
}
 
static void ega_display_char(char ch, bool silent)
{
    backbuf[ega_cursor * 2] = ch;
   
    if (!silent)
        videoram[ega_cursor * 2] = ch;
}
 
static void ega_putchar(chardev_t *d __attribute__((unused)), const char ch, bool silent)
{
    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, silent);
        ega_cursor++;
        break;
    }
    ega_check_cursor();
   
    if (!silent)
        ega_move_cursor();
   
    spinlock_unlock(&egalock);
    interrupts_restore(ipl);
}
 
static chardev_operations_t ega_ops = {
    .write = ega_putchar
};
 
void ega_init(ioport_t base, uintptr_t videoram_phys)
{
    /* Initialize the software structure. */   
    ega_base = base;
   
    backbuf = (uint8_t *) malloc(SCREEN * 2, 0);
    if (!backbuf)
        panic("Unable to allocate backbuffer.");
   
    videoram = (uint8_t *) hw_map(videoram_phys, SCREEN * 2);
   
    /* Clear the screen and set the cursor position. */
    memsetw(videoram, SCREEN, 0x0720);
    memsetw(backbuf, SCREEN, 0x0720);
    ega_move_cursor();
   
    chardev_initialize("ega_out", &ega_console, &ega_ops);
    stdout = &ega_console;
   
    ega_parea.pbase = videoram_phys;
    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.blinking", NULL, true);
    sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys);
}
 
void ega_redraw(void)
{
    memcpy(videoram, backbuf, SCREEN * 2);
    ega_move_cursor();
}
 
/** @}
 */
 

Rev 3844	Rev 3902
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 genarch_drivers	29	/** @addtogroup genarch_drivers
30	* @{	30	* @{
31	*/	31	*/
32	/**	32	/**
33	* @file	33	* @file
34	* @brief EGA driver.	34	* @brief EGA driver.
35	*/	35	*/
36		36
37	#include <genarch/drivers/ega/ega.h>	37	#include <genarch/drivers/ega/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 <mm/slab.h>
42	#include <arch/mm/page.h>	42	#include <arch/mm/page.h>
43	#include <synch/spinlock.h>	43	#include <synch/spinlock.h>
44	#include <arch/types.h>	44	#include <arch/types.h>
45	#include <arch/asm.h>	45	#include <arch/asm.h>
46	#include <memstr.h>	46	#include <memstr.h>
47	#include <console/chardev.h>	47	#include <console/chardev.h>
48	#include <console/console.h>	48	#include <console/console.h>
49	#include <sysinfo/sysinfo.h>	49	#include <sysinfo/sysinfo.h>
50	#include <ddi/ddi.h>	50	#include <ddi/ddi.h>
51		51
52	/*	52	/*
53	* The EGA driver.	53	* The EGA driver.
54	* Simple and short. Function for displaying characters and "scrolling".	54	* Simple and short. Function for displaying characters and "scrolling".
55	*/	55	*/
56		56
57	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. /
58		58
59	SPINLOCK_INITIALIZE(egalock);	59	SPINLOCK_INITIALIZE(egalock);
60	static uint32_t ega_cursor;	60	static uint32_t ega_cursor;
61	static uint8_t *videoram;	61	static uint8_t *videoram;
62	static uint8_t *backbuf;	62	static uint8_t *backbuf;
63	static ioport_t ega_base;	63	static ioport_t ega_base;
64		64
65	chardev_t ega_console;	65	chardev_t ega_console;
66		66
67	/*	67	/*
68	* This function takes care of scrolling.	68	* This function takes care of scrolling.
69	*/	69	*/
70	static void ega_check_cursor(void)	70	static void ega_check_cursor(void)
71	{	71	{
72	if (ega_cursor < SCREEN)	72	if (ega_cursor < SCREEN)
73	return;	73	return;
74		74
75	memmove((void ) videoram, (void ) (videoram + ROW * 2),	75	memmove((void ) videoram, (void ) (videoram + ROW * 2),
76	(SCREEN - ROW) * 2);	76	(SCREEN - ROW) * 2);
77	memmove((void ) backbuf, (void ) (backbuf + ROW * 2),	77	memmove((void ) backbuf, (void ) (backbuf + ROW * 2),
78	(SCREEN - ROW) * 2);	78	(SCREEN - ROW) * 2);
79	memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720);	79	memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720);
80	memsetw(backbuf + (SCREEN - ROW) * 2, ROW, 0x0720);	80	memsetw(backbuf + (SCREEN - ROW) * 2, ROW, 0x0720);
81	ega_cursor = ega_cursor - ROW;	81	ega_cursor = ega_cursor - ROW;
82	}	82	}
83		83
84	static void ega_move_cursor(void)	84	static void ega_move_cursor(void)
85	{	85	{
86	outb(ega_base + EGA_INDEX_REG, 0xe);	86	pio_write_8(ega_base + EGA_INDEX_REG, 0xe);
87	outb(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff));	87	pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff));
88	outb(ega_base + EGA_INDEX_REG, 0xf);	88	pio_write_8(ega_base + EGA_INDEX_REG, 0xf);
89	outb(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff));	89	pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff));
90	}	90	}
91		91
92	static void ega_display_char(char ch, bool silent)	92	static void ega_display_char(char ch, bool silent)
93	{	93	{
94	backbuf[ega_cursor * 2] = ch;	94	backbuf[ega_cursor * 2] = ch;
95		95
96	if (!silent)	96	if (!silent)
97	videoram[ega_cursor * 2] = ch;	97	videoram[ega_cursor * 2] = ch;
98	}	98	}
99		99
100	static void ega_putchar(chardev_t *d __attribute__((unused)), const char ch, bool silent)	100	static void ega_putchar(chardev_t *d __attribute__((unused)), const char ch, bool silent)
101	{	101	{
102	ipl_t ipl;	102	ipl_t ipl;
103		103
104	ipl = interrupts_disable();	104	ipl = interrupts_disable();
105	spinlock_lock(&egalock);	105	spinlock_lock(&egalock);
106		106
107	switch (ch) {	107	switch (ch) {
108	case '\n':	108	case '\n':
109	ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;	109	ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;
110	break;	110	break;
111	case '\t':	111	case '\t':
112	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;	112	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;
113	break;	113	break;
114	case '\b':	114	case '\b':
115	if (ega_cursor % ROW)	115	if (ega_cursor % ROW)
116	ega_cursor--;	116	ega_cursor--;
117	break;	117	break;
118	default:	118	default:
119	ega_display_char(ch, silent);	119	ega_display_char(ch, silent);
120	ega_cursor++;	120	ega_cursor++;
121	break;	121	break;
122	}	122	}
123	ega_check_cursor();	123	ega_check_cursor();
124		124
125	if (!silent)	125	if (!silent)
126	ega_move_cursor();	126	ega_move_cursor();
127		127
128	spinlock_unlock(&egalock);	128	spinlock_unlock(&egalock);
129	interrupts_restore(ipl);	129	interrupts_restore(ipl);
130	}	130	}
131		131
132	static chardev_operations_t ega_ops = {	132	static chardev_operations_t ega_ops = {
133	.write = ega_putchar	133	.write = ega_putchar
134	};	134	};
135		135
136	void ega_init(ioport_t base, uintptr_t videoram_phys)	136	void ega_init(ioport_t base, uintptr_t videoram_phys)
137	{	137	{
138	/* Initialize the software structure. */	138	/* Initialize the software structure. */
139	ega_base = base;	139	ega_base = base;
140		140
141	backbuf = (uint8_t ) malloc(SCREEN 2, 0);	141	backbuf = (uint8_t ) malloc(SCREEN 2, 0);
142	if (!backbuf)	142	if (!backbuf)
143	panic("Unable to allocate backbuffer.");	143	panic("Unable to allocate backbuffer.");
144		144
145	videoram = (uint8_t ) hw_map(videoram_phys, SCREEN 2);	145	videoram = (uint8_t ) hw_map(videoram_phys, SCREEN 2);
146		146
147	/* Clear the screen and set the cursor position. */	147	/* Clear the screen and set the cursor position. */
148	memsetw(videoram, SCREEN, 0x0720);	148	memsetw(videoram, SCREEN, 0x0720);
149	memsetw(backbuf, SCREEN, 0x0720);	149	memsetw(backbuf, SCREEN, 0x0720);
150	ega_move_cursor();	150	ega_move_cursor();
151		151
152	chardev_initialize("ega_out", &ega_console, &ega_ops);	152	chardev_initialize("ega_out", &ega_console, &ega_ops);
153	stdout = &ega_console;	153	stdout = &ega_console;
154		154
155	ega_parea.pbase = videoram_phys;	155	ega_parea.pbase = videoram_phys;
156	ega_parea.vbase = (uintptr_t) videoram;	156	ega_parea.vbase = (uintptr_t) videoram;
157	ega_parea.frames = 1;	157	ega_parea.frames = 1;
158	ega_parea.cacheable = false;	158	ega_parea.cacheable = false;
159	ddi_parea_register(&ega_parea);	159	ddi_parea_register(&ega_parea);
160		160
161	sysinfo_set_item_val("fb", NULL, true);	161	sysinfo_set_item_val("fb", NULL, true);
162	sysinfo_set_item_val("fb.kind", NULL, 2);	162	sysinfo_set_item_val("fb.kind", NULL, 2);
163	sysinfo_set_item_val("fb.width", NULL, ROW);	163	sysinfo_set_item_val("fb.width", NULL, ROW);
164	sysinfo_set_item_val("fb.height", NULL, ROWS);	164	sysinfo_set_item_val("fb.height", NULL, ROWS);
165	sysinfo_set_item_val("fb.blinking", NULL, true);	165	sysinfo_set_item_val("fb.blinking", NULL, true);
166	sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys);	166	sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys);
167	}	167	}
168		168
169	void ega_redraw(void)	169	void ega_redraw(void)
170	{	170	{
171	memcpy(videoram, backbuf, SCREEN * 2);	171	memcpy(videoram, backbuf, SCREEN * 2);
172	ega_move_cursor();	172	ega_move_cursor();
173	}	173	}
174		174
175	/** @}	175	/** @}
176	*/	176	*/
177		177

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(root)/trunk/kernel/genarch/src/drivers/ega/ega.c @ 3844 – Rev 3844 → 3902