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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 | /** @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 | SPINLOCK_INITIALIZE(egalock); |
57 | SPINLOCK_INITIALIZE(egalock); |
58 | static uint32_t ega_cursor; |
58 | static uint32_t ega_cursor; |
59 | static uint8_t *videoram; |
59 | static uint8_t *videoram; |
60 | static uint8_t *backbuf; |
60 | static uint8_t *backbuf; |
61 | static ioport8_t *ega_base; |
61 | static ioport8_t *ega_base; |
62 | 62 | ||
63 | chardev_t ega_console; |
63 | chardev_t ega_console; |
64 | 64 | ||
65 | /* |
65 | /* |
66 | * This function takes care of scrolling. |
66 | * This function takes care of scrolling. |
67 | */ |
67 | */ |
68 | static void ega_check_cursor(void) |
68 | static void ega_check_cursor(void) |
69 | { |
69 | { |
70 | if (ega_cursor < SCREEN) |
70 | if (ega_cursor < EGA_SCREEN) |
71 | return; |
71 | return; |
72 | 72 | ||
73 | memmove((void *) videoram, (void *) (videoram + ROW * 2), |
73 | memmove((void *) videoram, (void *) (videoram + EGA_COLS * 2), |
74 | (SCREEN - ROW) * 2); |
74 | (EGA_SCREEN - EGA_COLS) * 2); |
75 | memmove((void *) backbuf, (void *) (backbuf + ROW * 2), |
75 | memmove((void *) backbuf, (void *) (backbuf + EGA_COLS * 2), |
76 | (SCREEN - ROW) * 2); |
76 | (EGA_SCREEN - EGA_COLS) * 2); |
77 | memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720); |
77 | memsetw(videoram + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, 0x0720); |
78 | memsetw(backbuf + (SCREEN - ROW) * 2, ROW, 0x0720); |
78 | memsetw(backbuf + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, 0x0720); |
79 | ega_cursor = ega_cursor - ROW; |
79 | ega_cursor = ega_cursor - EGA_COLS; |
80 | } |
80 | } |
81 | 81 | ||
82 | static void ega_move_cursor(void) |
82 | static void ega_move_cursor(void) |
83 | { |
83 | { |
84 | pio_write_8(ega_base + EGA_INDEX_REG, 0xe); |
84 | pio_write_8(ega_base + EGA_INDEX_REG, 0xe); |
85 | pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff)); |
85 | pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff)); |
86 | pio_write_8(ega_base + EGA_INDEX_REG, 0xf); |
86 | pio_write_8(ega_base + EGA_INDEX_REG, 0xf); |
87 | pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff)); |
87 | pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff)); |
88 | } |
88 | } |
89 | 89 | ||
90 | static void ega_display_char(char ch, bool silent) |
90 | static void ega_display_char(char ch, bool silent) |
91 | { |
91 | { |
92 | backbuf[ega_cursor * 2] = ch; |
92 | backbuf[ega_cursor * 2] = ch; |
93 | 93 | ||
94 | if (!silent) |
94 | if (!silent) |
95 | videoram[ega_cursor * 2] = ch; |
95 | videoram[ega_cursor * 2] = ch; |
96 | } |
96 | } |
97 | 97 | ||
98 | static void ega_putchar(chardev_t *d __attribute__((unused)), const char ch, bool silent) |
98 | static void ega_putchar(chardev_t *d __attribute__((unused)), const char ch, bool silent) |
99 | { |
99 | { |
100 | ipl_t ipl; |
100 | ipl_t ipl; |
101 | 101 | ||
102 | ipl = interrupts_disable(); |
102 | ipl = interrupts_disable(); |
103 | spinlock_lock(&egalock); |
103 | spinlock_lock(&egalock); |
104 | 104 | ||
105 | switch (ch) { |
105 | switch (ch) { |
106 | case '\n': |
106 | case '\n': |
107 | ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW; |
107 | ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS; |
108 | break; |
108 | break; |
109 | case '\t': |
109 | case '\t': |
110 | ega_cursor = (ega_cursor + 8) - ega_cursor % 8; |
110 | ega_cursor = (ega_cursor + 8) - ega_cursor % 8; |
111 | break; |
111 | break; |
112 | case '\b': |
112 | case '\b': |
113 | if (ega_cursor % ROW) |
113 | if (ega_cursor % EGA_COLS) |
114 | ega_cursor--; |
114 | ega_cursor--; |
115 | break; |
115 | break; |
116 | default: |
116 | default: |
117 | ega_display_char(ch, silent); |
117 | ega_display_char(ch, silent); |
118 | ega_cursor++; |
118 | ega_cursor++; |
119 | break; |
119 | break; |
120 | } |
120 | } |
121 | ega_check_cursor(); |
121 | ega_check_cursor(); |
122 | 122 | ||
123 | if (!silent) |
123 | if (!silent) |
124 | ega_move_cursor(); |
124 | ega_move_cursor(); |
125 | 125 | ||
126 | spinlock_unlock(&egalock); |
126 | spinlock_unlock(&egalock); |
127 | interrupts_restore(ipl); |
127 | interrupts_restore(ipl); |
128 | } |
128 | } |
129 | 129 | ||
130 | static chardev_operations_t ega_ops = { |
130 | static chardev_operations_t ega_ops = { |
131 | .write = ega_putchar |
131 | .write = ega_putchar |
132 | }; |
132 | }; |
133 | 133 | ||
134 | void ega_init(ioport8_t *base, uintptr_t videoram_phys) |
134 | void ega_init(ioport8_t *base, uintptr_t videoram_phys) |
135 | { |
135 | { |
136 | /* Initialize the software structure. */ |
136 | /* Initialize the software structure. */ |
137 | ega_base = base; |
137 | ega_base = base; |
138 | 138 | ||
139 | backbuf = (uint8_t *) malloc(SCREEN * 2, 0); |
139 | backbuf = (uint8_t *) malloc(EGA_VRAM_SIZE, 0); |
140 | if (!backbuf) |
140 | if (!backbuf) |
141 | panic("Unable to allocate backbuffer."); |
141 | panic("Unable to allocate backbuffer."); |
142 | 142 | ||
143 | videoram = (uint8_t *) hw_map(videoram_phys, SCREEN * 2); |
143 | videoram = (uint8_t *) hw_map(videoram_phys, EGA_VRAM_SIZE); |
144 | 144 | ||
145 | /* Clear the screen and set the cursor position. */ |
145 | /* Clear the screen and set the cursor position. */ |
146 | memsetw(videoram, SCREEN, 0x0720); |
146 | memsetw(videoram, EGA_SCREEN, 0x0720); |
147 | memsetw(backbuf, SCREEN, 0x0720); |
147 | memsetw(backbuf, EGA_SCREEN, 0x0720); |
148 | ega_move_cursor(); |
148 | ega_move_cursor(); |
149 | 149 | ||
150 | chardev_initialize("ega_out", &ega_console, &ega_ops); |
150 | chardev_initialize("ega_out", &ega_console, &ega_ops); |
151 | stdout = &ega_console; |
151 | stdout = &ega_console; |
152 | 152 | ||
153 | sysinfo_set_item_val("fb", NULL, true); |
153 | sysinfo_set_item_val("fb", NULL, true); |
154 | sysinfo_set_item_val("fb.kind", NULL, 2); |
154 | sysinfo_set_item_val("fb.kind", NULL, 2); |
155 | sysinfo_set_item_val("fb.width", NULL, ROW); |
155 | sysinfo_set_item_val("fb.width", NULL, EGA_COLS); |
156 | sysinfo_set_item_val("fb.height", NULL, ROWS); |
156 | sysinfo_set_item_val("fb.height", NULL, EGA_ROWS); |
157 | sysinfo_set_item_val("fb.blinking", NULL, true); |
157 | sysinfo_set_item_val("fb.blinking", NULL, true); |
158 | sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys); |
158 | sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys); |
159 | } |
159 | } |
160 | 160 | ||
161 | void ega_redraw(void) |
161 | void ega_redraw(void) |
162 | { |
162 | { |
163 | memcpy(videoram, backbuf, SCREEN * 2); |
163 | memcpy(videoram, backbuf, EGA_VRAM_SIZE); |
164 | ega_move_cursor(); |
164 | ega_move_cursor(); |
165 | } |
165 | } |
166 | 166 | ||
167 | /** @} |
167 | /** @} |
168 | */ |
168 | */ |
169 | 169 |