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.
 */
 
#include <arch/ega.h>
#include <putchar.h>
#include <mm/page.h>
#include <mm/asid.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>
 
/*
 * The EGA driver.
 * Simple and short. Function for displaying characters and "scrolling".
 */
 
SPINLOCK_INITIALIZE(egalock);
static __u32 ega_cursor;
 
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;
 
    page_mapping_insert(PA2KA(VIDEORAM), ASID_KERNEL, VIDEORAM, PAGE_NOT_CACHEABLE, 0);
    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;
 
    putchar('\n');
}
 
static void ega_display_char(char ch)
{
    __u8 *vram = (__u8 *) PA2KA(VIDEORAM);
   
    vram[ega_cursor*2] = ch;
}
 
/*
 * This function takes care of scrolling.
 */
static void ega_check_cursor(void)
{
    if (ega_cursor < SCREEN)
        return;
 
    memcpy((void *)PA2KA(VIDEORAM), (void *)(PA2KA(VIDEORAM) + ROW*2), (SCREEN - ROW)*2);
    memsetw(PA2KA(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 623	Rev 687
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	#include <arch/ega.h>	29	#include <arch/ega.h>
30	#include <putchar.h>	30	#include <putchar.h>
31	#include <mm/page.h>	31	#include <mm/page.h>
-		32	#include <mm/asid.h>
32	#include <arch/mm/page.h>	33	#include <arch/mm/page.h>
33	#include <synch/spinlock.h>	34	#include <synch/spinlock.h>
34	#include <arch/types.h>	35	#include <arch/types.h>
35	#include <arch/asm.h>	36	#include <arch/asm.h>
36	#include <memstr.h>	37	#include <memstr.h>
37	#include <console/chardev.h>	38	#include <console/chardev.h>
38	#include <console/console.h>	39	#include <console/console.h>
39		40
40	/*	41	/*
41	* The EGA driver.	42	* The EGA driver.
42	* Simple and short. Function for displaying characters and "scrolling".	43	* Simple and short. Function for displaying characters and "scrolling".
43	*/	44	*/
44		45
45	SPINLOCK_INITIALIZE(egalock);	46	SPINLOCK_INITIALIZE(egalock);
46	static __u32 ega_cursor;	47	static __u32 ega_cursor;
47		48
48	static void ega_putchar(chardev_t *d, const char ch);	49	static void ega_putchar(chardev_t *d, const char ch);
49		50
50	chardev_t ega_console;	51	chardev_t ega_console;
51	static chardev_operations_t ega_ops = {	52	static chardev_operations_t ega_ops = {
52	.write = ega_putchar	53	.write = ega_putchar
53	};	54	};
54		55
55	void ega_move_cursor(void);	56	void ega_move_cursor(void);
56		57
57	void ega_init(void)	58	void ega_init(void)
58	{	59	{
59	__u8 hi, lo;	60	__u8 hi, lo;
60		61
61	page_mapping_insert(PA2KA(VIDEORAM), VIDEORAM, PAGE_NOT_CACHEABLE, 0);	62	page_mapping_insert(PA2KA(VIDEORAM), ASID_KERNEL, VIDEORAM, PAGE_NOT_CACHEABLE, 0);
62	outb(0x3d4,0xe);	63	outb(0x3d4,0xe);
63	hi = inb(0x3d5);	64	hi = inb(0x3d5);
64	outb(0x3d4,0xf);	65	outb(0x3d4,0xf);
65	lo = inb(0x3d5);	66	lo = inb(0x3d5);
66	ega_cursor = (hi<<8)\|lo;	67	ega_cursor = (hi<<8)\|lo;
67		68
68	chardev_initialize("ega_out", &ega_console, &ega_ops);	69	chardev_initialize("ega_out", &ega_console, &ega_ops);
69	stdout = &ega_console;	70	stdout = &ega_console;
70		71
71	putchar('\n');	72	putchar('\n');
72	}	73	}
73		74
74	static void ega_display_char(char ch)	75	static void ega_display_char(char ch)
75	{	76	{
76	__u8 vram = (__u8 ) PA2KA(VIDEORAM);	77	__u8 vram = (__u8 ) PA2KA(VIDEORAM);
77		78
78	vram[ega_cursor*2] = ch;	79	vram[ega_cursor*2] = ch;
79	}	80	}
80		81
81	/*	82	/*
82	* This function takes care of scrolling.	83	* This function takes care of scrolling.
83	*/	84	*/
84	static void ega_check_cursor(void)	85	static void ega_check_cursor(void)
85	{	86	{
86	if (ega_cursor < SCREEN)	87	if (ega_cursor < SCREEN)
87	return;	88	return;
88		89
89	memcpy((void )PA2KA(VIDEORAM), (void )(PA2KA(VIDEORAM) + ROW2), (SCREEN - ROW)2);	90	memcpy((void )PA2KA(VIDEORAM), (void )(PA2KA(VIDEORAM) + ROW2), (SCREEN - ROW)2);
90	memsetw(PA2KA(VIDEORAM) + (SCREEN - ROW)*2, ROW, 0x0720);	91	memsetw(PA2KA(VIDEORAM) + (SCREEN - ROW)*2, ROW, 0x0720);
91	ega_cursor = ega_cursor - ROW;	92	ega_cursor = ega_cursor - ROW;
92	}	93	}
93		94
94	void ega_putchar(chardev_t *d, const char ch)	95	void ega_putchar(chardev_t *d, const char ch)
95	{	96	{
96	ipl_t ipl;	97	ipl_t ipl;
97		98
98	ipl = interrupts_disable();	99	ipl = interrupts_disable();
99	spinlock_lock(&egalock);	100	spinlock_lock(&egalock);
100		101
101	switch (ch) {	102	switch (ch) {
102	case '\n':	103	case '\n':
103	ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;	104	ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW;
104	break;	105	break;
105	case '\t':	106	case '\t':
106	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;	107	ega_cursor = (ega_cursor + 8) - ega_cursor % 8;
107	break;	108	break;
108	case '\b':	109	case '\b':
109	if (ega_cursor % ROW)	110	if (ega_cursor % ROW)
110	ega_cursor--;	111	ega_cursor--;
111	break;	112	break;
112	default:	113	default:
113	ega_display_char(ch);	114	ega_display_char(ch);
114	ega_cursor++;	115	ega_cursor++;
115	break;	116	break;
116	}	117	}
117	ega_check_cursor();	118	ega_check_cursor();
118	ega_move_cursor();	119	ega_move_cursor();
119		120
120	spinlock_unlock(&egalock);	121	spinlock_unlock(&egalock);
121	interrupts_restore(ipl);	122	interrupts_restore(ipl);
122	}	123	}
123		124
124	void ega_move_cursor(void)	125	void ega_move_cursor(void)
125	{	126	{
126	outb(0x3d4,0xe);	127	outb(0x3d4,0xe);
127	outb(0x3d5,(ega_cursor>>8)&0xff);	128	outb(0x3d5,(ega_cursor>>8)&0xff);
128	outb(0x3d4,0xf);	129	outb(0x3d4,0xf);
129	outb(0x3d5,ega_cursor&0xff);	130	outb(0x3d5,ega_cursor&0xff);
130	}	131	}
131		132

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ia32/src/drivers/ega.c – Rev 623 → 687