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