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