Rev 3975 | Rev 4177 | Go to most recent revision | Only display areas with differences | Regard whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 3975 | Rev 3994 | ||
---|---|---|---|
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 | #define EMPTY_CHAR 0x0720 |
|
- | 64 | ||
63 | chardev_t ega_console; |
65 | chardev_t ega_console; |
64 | 66 | ||
65 | /* |
67 | /* |
66 | * This function takes care of scrolling. |
68 | * This function takes care of scrolling. |
67 | */ |
69 | */ |
68 | static void ega_check_cursor(void) |
70 | static void ega_check_cursor(void) |
69 | { |
71 | { |
70 | if (ega_cursor < EGA_SCREEN) |
72 | if (ega_cursor < EGA_SCREEN) |
71 | return; |
73 | return; |
72 | 74 | ||
73 | memmove((void *) videoram, (void *) (videoram + EGA_COLS * 2), |
75 | memmove((void *) videoram, (void *) (videoram + EGA_COLS * 2), |
74 | (EGA_SCREEN - EGA_COLS) * 2); |
76 | (EGA_SCREEN - EGA_COLS) * 2); |
75 | memmove((void *) backbuf, (void *) (backbuf + EGA_COLS * 2), |
77 | memmove((void *) backbuf, (void *) (backbuf + EGA_COLS * 2), |
76 | (EGA_SCREEN - EGA_COLS) * 2); |
78 | (EGA_SCREEN - EGA_COLS) * 2); |
77 | memsetw(videoram + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, 0x0720); |
79 | memsetw(videoram + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR); |
78 | memsetw(backbuf + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, 0x0720); |
80 | memsetw(backbuf + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR); |
79 | ega_cursor = ega_cursor - EGA_COLS; |
81 | ega_cursor = ega_cursor - EGA_COLS; |
80 | } |
82 | } |
81 | 83 | ||
82 | static void ega_show_cursor(void) |
84 | static void ega_show_cursor(void) |
83 | { |
85 | { |
84 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0a); |
86 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0a); |
85 | uint8_t stat = pio_read_8(ega_base + EGA_DATA_REG); |
87 | uint8_t stat = pio_read_8(ega_base + EGA_DATA_REG); |
86 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0a); |
88 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0a); |
87 | pio_write_8(ega_base + EGA_DATA_REG, stat & (~(1 << 5))); |
89 | pio_write_8(ega_base + EGA_DATA_REG, stat & (~(1 << 5))); |
88 | } |
90 | } |
89 | 91 | ||
90 | static void ega_move_cursor(void) |
92 | static void ega_move_cursor(void) |
91 | { |
93 | { |
92 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0e); |
94 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0e); |
93 | pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff)); |
95 | pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff)); |
94 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0f); |
96 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0f); |
95 | pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff)); |
97 | pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff)); |
96 | } |
98 | } |
97 | 99 | ||
98 | static void ega_sync_cursor(void) |
100 | static void ega_sync_cursor(void) |
99 | { |
101 | { |
100 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0e); |
102 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0e); |
101 | uint8_t hi = pio_read_8(ega_base + EGA_DATA_REG); |
103 | uint8_t hi = pio_read_8(ega_base + EGA_DATA_REG); |
102 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0f); |
104 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0f); |
103 | uint8_t lo = pio_read_8(ega_base + EGA_DATA_REG); |
105 | uint8_t lo = pio_read_8(ega_base + EGA_DATA_REG); |
104 | 106 | ||
105 | ega_cursor = (hi << 8) | lo; |
107 | ega_cursor = (hi << 8) | lo; |
- | 108 | ||
- | 109 | if (ega_cursor >= EGA_SCREEN) |
|
- | 110 | ega_cursor = 0; |
|
- | 111 | ||
106 | if ((ega_cursor % EGA_COLS) != 0) |
112 | if ((ega_cursor % EGA_COLS) != 0) |
107 | ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS; |
113 | ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS; |
108 | 114 | ||
- | 115 | memsetw(videoram + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR); |
|
- | 116 | memsetw(backbuf + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR); |
|
- | 117 | ||
109 | ega_check_cursor(); |
118 | ega_check_cursor(); |
110 | ega_move_cursor(); |
119 | ega_move_cursor(); |
111 | ega_show_cursor(); |
120 | ega_show_cursor(); |
112 | } |
121 | } |
113 | 122 | ||
114 | static void ega_display_char(char ch, bool silent) |
123 | static void ega_display_char(char ch, bool silent) |
115 | { |
124 | { |
116 | backbuf[ega_cursor * 2] = ch; |
125 | backbuf[ega_cursor * 2] = ch; |
117 | 126 | ||
118 | if (!silent) |
127 | if (!silent) |
119 | videoram[ega_cursor * 2] = ch; |
128 | videoram[ega_cursor * 2] = ch; |
120 | } |
129 | } |
121 | 130 | ||
122 | static void ega_putchar(chardev_t *d __attribute__((unused)), const char ch, bool silent) |
131 | static void ega_putchar(chardev_t *dev __attribute__((unused)), const char ch, bool silent) |
123 | { |
132 | { |
124 | ipl_t ipl; |
133 | ipl_t ipl; |
125 | 134 | ||
126 | ipl = interrupts_disable(); |
135 | ipl = interrupts_disable(); |
127 | spinlock_lock(&egalock); |
136 | spinlock_lock(&egalock); |
128 | 137 | ||
129 | switch (ch) { |
138 | switch (ch) { |
130 | case '\n': |
139 | case '\n': |
131 | ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS; |
140 | ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS; |
132 | break; |
141 | break; |
133 | case '\t': |
142 | case '\t': |
134 | ega_cursor = (ega_cursor + 8) - ega_cursor % 8; |
143 | ega_cursor = (ega_cursor + 8) - ega_cursor % 8; |
135 | break; |
144 | break; |
136 | case '\b': |
145 | case '\b': |
137 | if (ega_cursor % EGA_COLS) |
146 | if (ega_cursor % EGA_COLS) |
138 | ega_cursor--; |
147 | ega_cursor--; |
139 | break; |
148 | break; |
140 | default: |
149 | default: |
141 | ega_display_char(ch, silent); |
150 | ega_display_char(ch, silent); |
142 | ega_cursor++; |
151 | ega_cursor++; |
143 | break; |
152 | break; |
144 | } |
153 | } |
145 | ega_check_cursor(); |
154 | ega_check_cursor(); |
146 | 155 | ||
147 | if (!silent) |
156 | if (!silent) |
148 | ega_move_cursor(); |
157 | ega_move_cursor(); |
149 | 158 | ||
150 | spinlock_unlock(&egalock); |
159 | spinlock_unlock(&egalock); |
151 | interrupts_restore(ipl); |
160 | interrupts_restore(ipl); |
152 | } |
161 | } |
153 | 162 | ||
154 | static chardev_operations_t ega_ops = { |
163 | static chardev_operations_t ega_ops = { |
155 | .write = ega_putchar |
164 | .write = ega_putchar |
156 | }; |
165 | }; |
157 | 166 | ||
158 | void ega_init(ioport8_t *base, uintptr_t videoram_phys) |
167 | void ega_init(ioport8_t *base, uintptr_t videoram_phys) |
159 | { |
168 | { |
160 | /* Initialize the software structure. */ |
169 | /* Initialize the software structure. */ |
161 | ega_base = base; |
170 | ega_base = base; |
162 | 171 | ||
163 | backbuf = (uint8_t *) malloc(EGA_VRAM_SIZE, 0); |
172 | backbuf = (uint8_t *) malloc(EGA_VRAM_SIZE, 0); |
164 | if (!backbuf) |
173 | if (!backbuf) |
165 | panic("Unable to allocate backbuffer."); |
174 | panic("Unable to allocate backbuffer."); |
166 | 175 | ||
167 | videoram = (uint8_t *) hw_map(videoram_phys, EGA_VRAM_SIZE); |
176 | videoram = (uint8_t *) hw_map(videoram_phys, EGA_VRAM_SIZE); |
168 | 177 | ||
169 | /* Synchronize the back buffer and cursor position. */ |
178 | /* Synchronize the back buffer and cursor position. */ |
170 | memcpy(backbuf, videoram, EGA_VRAM_SIZE); |
179 | memcpy(backbuf, videoram, EGA_VRAM_SIZE); |
171 | ega_sync_cursor(); |
180 | ega_sync_cursor(); |
172 | 181 | ||
173 | chardev_initialize("ega_out", &ega_console, &ega_ops); |
182 | chardev_initialize("ega_out", &ega_console, &ega_ops); |
174 | stdout = &ega_console; |
183 | stdout = &ega_console; |
175 | 184 | ||
176 | sysinfo_set_item_val("fb", NULL, true); |
185 | sysinfo_set_item_val("fb", NULL, true); |
177 | sysinfo_set_item_val("fb.kind", NULL, 2); |
186 | sysinfo_set_item_val("fb.kind", NULL, 2); |
178 | sysinfo_set_item_val("fb.width", NULL, EGA_COLS); |
187 | sysinfo_set_item_val("fb.width", NULL, EGA_COLS); |
179 | sysinfo_set_item_val("fb.height", NULL, EGA_ROWS); |
188 | sysinfo_set_item_val("fb.height", NULL, EGA_ROWS); |
180 | sysinfo_set_item_val("fb.blinking", NULL, true); |
189 | sysinfo_set_item_val("fb.blinking", NULL, true); |
181 | sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys); |
190 | sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys); |
182 | } |
191 | } |
183 | 192 | ||
184 | void ega_redraw(void) |
193 | void ega_redraw(void) |
185 | { |
194 | { |
186 | memcpy(videoram, backbuf, EGA_VRAM_SIZE); |
195 | memcpy(videoram, backbuf, EGA_VRAM_SIZE); |
187 | ega_move_cursor(); |
196 | ega_move_cursor(); |
188 | ega_show_cursor(); |
197 | ega_show_cursor(); |
189 | } |
198 | } |
190 | 199 | ||
191 | /** @} |
200 | /** @} |
192 | */ |
201 | */ |
193 | 202 |