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