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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 | #define SPACE 0x20 |
63 | #define SPACE 0x20 |
64 | #define STYLE 0x07 |
64 | #define STYLE 0x07 |
65 | 65 | ||
66 | #define EMPTY_CHAR (STYLE << 8 | SPACE) |
66 | #define EMPTY_CHAR (STYLE << 8 | SPACE) |
67 | 67 | ||
68 | /* |
68 | /* |
69 | * This function takes care of scrolling. |
69 | * This function takes care of scrolling. |
70 | */ |
70 | */ |
71 | static void ega_check_cursor(void) |
71 | static void ega_check_cursor(void) |
72 | { |
72 | { |
73 | if (ega_cursor < EGA_SCREEN) |
73 | if (ega_cursor < EGA_SCREEN) |
74 | return; |
74 | return; |
75 | 75 | ||
76 | memmove((void *) videoram, (void *) (videoram + EGA_COLS * 2), |
76 | memmove((void *) videoram, (void *) (videoram + EGA_COLS * 2), |
77 | (EGA_SCREEN - EGA_COLS) * 2); |
77 | (EGA_SCREEN - EGA_COLS) * 2); |
78 | memmove((void *) backbuf, (void *) (backbuf + EGA_COLS * 2), |
78 | memmove((void *) backbuf, (void *) (backbuf + EGA_COLS * 2), |
79 | (EGA_SCREEN - EGA_COLS) * 2); |
79 | (EGA_SCREEN - EGA_COLS) * 2); |
80 | memsetw(videoram + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR); |
80 | memsetw(videoram + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR); |
81 | memsetw(backbuf + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR); |
81 | memsetw(backbuf + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR); |
82 | ega_cursor = ega_cursor - EGA_COLS; |
82 | ega_cursor = ega_cursor - EGA_COLS; |
83 | } |
83 | } |
84 | 84 | ||
85 | static void ega_show_cursor(void) |
85 | static void ega_show_cursor(void) |
86 | { |
86 | { |
87 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0a); |
87 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0a); |
88 | uint8_t stat = pio_read_8(ega_base + EGA_DATA_REG); |
88 | uint8_t stat = pio_read_8(ega_base + EGA_DATA_REG); |
89 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0a); |
89 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0a); |
90 | pio_write_8(ega_base + EGA_DATA_REG, stat & (~(1 << 5))); |
90 | pio_write_8(ega_base + EGA_DATA_REG, stat & (~(1 << 5))); |
91 | } |
91 | } |
92 | 92 | ||
93 | static void ega_move_cursor(void) |
93 | static void ega_move_cursor(void) |
94 | { |
94 | { |
95 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0e); |
95 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0e); |
96 | pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff)); |
96 | pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff)); |
97 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0f); |
97 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0f); |
98 | pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff)); |
98 | pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff)); |
99 | } |
99 | } |
100 | 100 | ||
101 | static void ega_sync_cursor(void) |
101 | static void ega_sync_cursor(void) |
102 | { |
102 | { |
103 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0e); |
103 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0e); |
104 | uint8_t hi = pio_read_8(ega_base + EGA_DATA_REG); |
104 | uint8_t hi = pio_read_8(ega_base + EGA_DATA_REG); |
105 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0f); |
105 | pio_write_8(ega_base + EGA_INDEX_REG, 0x0f); |
106 | uint8_t lo = pio_read_8(ega_base + EGA_DATA_REG); |
106 | uint8_t lo = pio_read_8(ega_base + EGA_DATA_REG); |
107 | 107 | ||
108 | ega_cursor = (hi << 8) | lo; |
108 | ega_cursor = (hi << 8) | lo; |
109 | 109 | ||
110 | if (ega_cursor >= EGA_SCREEN) |
110 | if (ega_cursor >= EGA_SCREEN) |
111 | ega_cursor = 0; |
111 | ega_cursor = 0; |
112 | 112 | ||
113 | if ((ega_cursor % EGA_COLS) != 0) |
113 | if ((ega_cursor % EGA_COLS) != 0) |
114 | ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS; |
114 | ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS; |
115 | 115 | ||
116 | memsetw(videoram + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR); |
116 | memsetw(videoram + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR); |
117 | memsetw(backbuf + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR); |
117 | memsetw(backbuf + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR); |
118 | 118 | ||
119 | ega_check_cursor(); |
119 | ega_check_cursor(); |
120 | ega_move_cursor(); |
120 | ega_move_cursor(); |
121 | ega_show_cursor(); |
121 | ega_show_cursor(); |
122 | } |
122 | } |
123 | 123 | ||
124 | static void ega_display_char(char ch, bool silent) |
124 | static void ega_display_char(char ch, bool silent) |
125 | { |
125 | { |
126 | backbuf[ega_cursor * 2] = ch; |
126 | backbuf[ega_cursor * 2] = ch; |
127 | backbuf[ega_cursor * 2 + 1] = STYLE; |
127 | backbuf[ega_cursor * 2 + 1] = STYLE; |
128 | 128 | ||
129 | if (!silent) { |
129 | if (!silent) { |
130 | videoram[ega_cursor * 2] = ch; |
130 | videoram[ega_cursor * 2] = ch; |
131 | videoram[ega_cursor * 2 + 1] = STYLE; |
131 | videoram[ega_cursor * 2 + 1] = STYLE; |
132 | } |
132 | } |
133 | } |
133 | } |
134 | 134 | ||
135 | static void ega_putchar(outdev_t *dev __attribute__((unused)), const char ch, bool silent) |
135 | static void ega_putchar(outdev_t *dev __attribute__((unused)), wchar_t ch, bool silent) |
136 | { |
136 | { |
137 | ipl_t ipl; |
137 | ipl_t ipl; |
138 | 138 | ||
139 | ipl = interrupts_disable(); |
139 | ipl = interrupts_disable(); |
140 | spinlock_lock(&egalock); |
140 | spinlock_lock(&egalock); |
141 | 141 | ||
142 | switch (ch) { |
142 | switch (ch) { |
143 | case '\n': |
143 | case '\n': |
144 | ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS; |
144 | ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS; |
145 | break; |
145 | break; |
146 | case '\t': |
146 | case '\t': |
147 | ega_cursor = (ega_cursor + 8) - ega_cursor % 8; |
147 | ega_cursor = (ega_cursor + 8) - ega_cursor % 8; |
148 | break; |
148 | break; |
149 | case '\b': |
149 | case '\b': |
150 | if (ega_cursor % EGA_COLS) |
150 | if (ega_cursor % EGA_COLS) |
151 | ega_cursor--; |
151 | ega_cursor--; |
152 | break; |
152 | break; |
153 | default: |
153 | default: |
154 | ega_display_char(ch, silent); |
154 | ega_display_char(ch, silent); |
155 | ega_cursor++; |
155 | ega_cursor++; |
156 | break; |
156 | break; |
157 | } |
157 | } |
158 | ega_check_cursor(); |
158 | ega_check_cursor(); |
159 | 159 | ||
160 | if (!silent) |
160 | if (!silent) |
161 | ega_move_cursor(); |
161 | ega_move_cursor(); |
162 | 162 | ||
163 | spinlock_unlock(&egalock); |
163 | spinlock_unlock(&egalock); |
164 | interrupts_restore(ipl); |
164 | interrupts_restore(ipl); |
165 | } |
165 | } |
166 | 166 | ||
167 | static outdev_t ega_console; |
167 | static outdev_t ega_console; |
168 | static outdev_operations_t ega_ops = { |
168 | static outdev_operations_t ega_ops = { |
169 | .write = ega_putchar |
169 | .write = ega_putchar |
170 | }; |
170 | }; |
171 | 171 | ||
172 | void ega_init(ioport8_t *base, uintptr_t videoram_phys) |
172 | void ega_init(ioport8_t *base, uintptr_t videoram_phys) |
173 | { |
173 | { |
174 | /* Initialize the software structure. */ |
174 | /* Initialize the software structure. */ |
175 | ega_base = base; |
175 | ega_base = base; |
176 | 176 | ||
177 | backbuf = (uint8_t *) malloc(EGA_VRAM_SIZE, 0); |
177 | backbuf = (uint8_t *) malloc(EGA_VRAM_SIZE, 0); |
178 | if (!backbuf) |
178 | if (!backbuf) |
179 | panic("Unable to allocate backbuffer."); |
179 | panic("Unable to allocate backbuffer."); |
180 | 180 | ||
181 | videoram = (uint8_t *) hw_map(videoram_phys, EGA_VRAM_SIZE); |
181 | videoram = (uint8_t *) hw_map(videoram_phys, EGA_VRAM_SIZE); |
182 | 182 | ||
183 | /* Synchronize the back buffer and cursor position. */ |
183 | /* Synchronize the back buffer and cursor position. */ |
184 | memcpy(backbuf, videoram, EGA_VRAM_SIZE); |
184 | memcpy(backbuf, videoram, EGA_VRAM_SIZE); |
185 | ega_sync_cursor(); |
185 | ega_sync_cursor(); |
186 | 186 | ||
187 | outdev_initialize("ega", &ega_console, &ega_ops); |
187 | outdev_initialize("ega", &ega_console, &ega_ops); |
188 | stdout = &ega_console; |
188 | stdout = &ega_console; |
189 | 189 | ||
190 | sysinfo_set_item_val("fb", NULL, true); |
190 | sysinfo_set_item_val("fb", NULL, true); |
191 | sysinfo_set_item_val("fb.kind", NULL, 2); |
191 | sysinfo_set_item_val("fb.kind", NULL, 2); |
192 | sysinfo_set_item_val("fb.width", NULL, EGA_COLS); |
192 | sysinfo_set_item_val("fb.width", NULL, EGA_COLS); |
193 | sysinfo_set_item_val("fb.height", NULL, EGA_ROWS); |
193 | sysinfo_set_item_val("fb.height", NULL, EGA_ROWS); |
194 | sysinfo_set_item_val("fb.blinking", NULL, true); |
194 | sysinfo_set_item_val("fb.blinking", NULL, true); |
195 | sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys); |
195 | sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys); |
196 | } |
196 | } |
197 | 197 | ||
198 | void ega_redraw(void) |
198 | void ega_redraw(void) |
199 | { |
199 | { |
200 | memcpy(videoram, backbuf, EGA_VRAM_SIZE); |
200 | memcpy(videoram, backbuf, EGA_VRAM_SIZE); |
201 | ega_move_cursor(); |
201 | ega_move_cursor(); |
202 | ega_show_cursor(); |
202 | ega_show_cursor(); |
203 | } |
203 | } |
204 | 204 | ||
205 | /** @} |
205 | /** @} |
206 | */ |
206 | */ |
207 | 207 |