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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 | static parea_t ega_parea; /**< Physical memory area for EGA video RAM. */ |
57 | static parea_t ega_parea; /**< Physical memory area for EGA video RAM. */ |
58 | 58 | ||
59 | SPINLOCK_INITIALIZE(egalock); |
59 | SPINLOCK_INITIALIZE(egalock); |
60 | static uint32_t ega_cursor; |
60 | static uint32_t ega_cursor; |
61 | static uint8_t *videoram; |
61 | static uint8_t *videoram; |
62 | static uint8_t *backbuf; |
62 | static uint8_t *backbuf; |
63 | static ioport_t ega_base; |
63 | static ioport_t ega_base; |
64 | 64 | ||
65 | static void ega_putchar(chardev_t *d, const char ch); |
65 | static void ega_putchar(chardev_t *d, const char ch); |
66 | 66 | ||
67 | chardev_t ega_console; |
67 | chardev_t ega_console; |
68 | static chardev_operations_t ega_ops = { |
68 | static chardev_operations_t ega_ops = { |
69 | .write = ega_putchar |
69 | .write = ega_putchar |
70 | }; |
70 | }; |
71 | 71 | ||
72 | static void ega_move_cursor(void); |
72 | static void ega_move_cursor(void); |
73 | 73 | ||
74 | void ega_init(ioport_t base, uintptr_t videoram_phys) |
74 | void ega_init(ioport_t base, uintptr_t videoram_phys) |
75 | { |
75 | { |
76 | /* Initialize the software structure. */ |
76 | /* Initialize the software structure. */ |
77 | ega_base = base; |
77 | ega_base = base; |
78 | 78 | ||
79 | backbuf = (uint8_t *) malloc(SCREEN * 2, 0); |
79 | backbuf = (uint8_t *) malloc(SCREEN * 2, 0); |
80 | if (!backbuf) |
80 | if (!backbuf) |
81 | panic("Unable to allocate backbuffer.\n"); |
81 | panic("Unable to allocate backbuffer."); |
82 | 82 | ||
83 | videoram = (uint8_t *) hw_map(videoram_phys, SCREEN * 2); |
83 | videoram = (uint8_t *) hw_map(videoram_phys, SCREEN * 2); |
84 | 84 | ||
85 | /* Clear the screen and set the cursor position. */ |
85 | /* Clear the screen and set the cursor position. */ |
86 | memsetw(videoram, SCREEN, 0x0720); |
86 | memsetw(videoram, SCREEN, 0x0720); |
87 | memsetw(backbuf, SCREEN, 0x0720); |
87 | memsetw(backbuf, SCREEN, 0x0720); |
88 | ega_move_cursor(); |
88 | ega_move_cursor(); |
89 | 89 | ||
90 | chardev_initialize("ega_out", &ega_console, &ega_ops); |
90 | chardev_initialize("ega_out", &ega_console, &ega_ops); |
91 | stdout = &ega_console; |
91 | stdout = &ega_console; |
92 | 92 | ||
93 | ega_parea.pbase = videoram_phys; |
93 | ega_parea.pbase = videoram_phys; |
94 | ega_parea.vbase = (uintptr_t) videoram; |
94 | ega_parea.vbase = (uintptr_t) videoram; |
95 | ega_parea.frames = 1; |
95 | ega_parea.frames = 1; |
96 | ega_parea.cacheable = false; |
96 | ega_parea.cacheable = false; |
97 | ddi_parea_register(&ega_parea); |
97 | ddi_parea_register(&ega_parea); |
98 | 98 | ||
99 | sysinfo_set_item_val("fb", NULL, true); |
99 | sysinfo_set_item_val("fb", NULL, true); |
100 | sysinfo_set_item_val("fb.kind", NULL, 2); |
100 | sysinfo_set_item_val("fb.kind", NULL, 2); |
101 | sysinfo_set_item_val("fb.width", NULL, ROW); |
101 | sysinfo_set_item_val("fb.width", NULL, ROW); |
102 | sysinfo_set_item_val("fb.height", NULL, ROWS); |
102 | sysinfo_set_item_val("fb.height", NULL, ROWS); |
103 | sysinfo_set_item_val("fb.blinking", NULL, true); |
103 | sysinfo_set_item_val("fb.blinking", NULL, true); |
104 | sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys); |
104 | sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys); |
105 | } |
105 | } |
106 | 106 | ||
107 | static void ega_display_char(char ch) |
107 | static void ega_display_char(char ch) |
108 | { |
108 | { |
109 | videoram[ega_cursor * 2] = ch; |
109 | videoram[ega_cursor * 2] = ch; |
110 | backbuf[ega_cursor * 2] = ch; |
110 | backbuf[ega_cursor * 2] = ch; |
111 | } |
111 | } |
112 | 112 | ||
113 | /* |
113 | /* |
114 | * This function takes care of scrolling. |
114 | * This function takes care of scrolling. |
115 | */ |
115 | */ |
116 | static void ega_check_cursor(void) |
116 | static void ega_check_cursor(void) |
117 | { |
117 | { |
118 | if (ega_cursor < SCREEN) |
118 | if (ega_cursor < SCREEN) |
119 | return; |
119 | return; |
120 | 120 | ||
121 | memmove((void *) videoram, (void *) (videoram + ROW * 2), |
121 | memmove((void *) videoram, (void *) (videoram + ROW * 2), |
122 | (SCREEN - ROW) * 2); |
122 | (SCREEN - ROW) * 2); |
123 | memmove((void *) backbuf, (void *) (backbuf + ROW * 2), |
123 | memmove((void *) backbuf, (void *) (backbuf + ROW * 2), |
124 | (SCREEN - ROW) * 2); |
124 | (SCREEN - ROW) * 2); |
125 | memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720); |
125 | memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720); |
126 | memsetw(backbuf + (SCREEN - ROW) * 2, ROW, 0x0720); |
126 | memsetw(backbuf + (SCREEN - ROW) * 2, ROW, 0x0720); |
127 | ega_cursor = ega_cursor - ROW; |
127 | ega_cursor = ega_cursor - ROW; |
128 | } |
128 | } |
129 | 129 | ||
130 | void ega_putchar(chardev_t *d __attribute__((unused)), const char ch) |
130 | void ega_putchar(chardev_t *d __attribute__((unused)), const char ch) |
131 | { |
131 | { |
132 | ipl_t ipl; |
132 | ipl_t ipl; |
133 | 133 | ||
134 | ipl = interrupts_disable(); |
134 | ipl = interrupts_disable(); |
135 | spinlock_lock(&egalock); |
135 | spinlock_lock(&egalock); |
136 | 136 | ||
137 | switch (ch) { |
137 | switch (ch) { |
138 | case '\n': |
138 | case '\n': |
139 | ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW; |
139 | ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW; |
140 | break; |
140 | break; |
141 | case '\t': |
141 | case '\t': |
142 | ega_cursor = (ega_cursor + 8) - ega_cursor % 8; |
142 | ega_cursor = (ega_cursor + 8) - ega_cursor % 8; |
143 | break; |
143 | break; |
144 | case '\b': |
144 | case '\b': |
145 | if (ega_cursor % ROW) |
145 | if (ega_cursor % ROW) |
146 | ega_cursor--; |
146 | ega_cursor--; |
147 | break; |
147 | break; |
148 | default: |
148 | default: |
149 | ega_display_char(ch); |
149 | ega_display_char(ch); |
150 | ega_cursor++; |
150 | ega_cursor++; |
151 | break; |
151 | break; |
152 | } |
152 | } |
153 | ega_check_cursor(); |
153 | ega_check_cursor(); |
154 | ega_move_cursor(); |
154 | ega_move_cursor(); |
155 | 155 | ||
156 | spinlock_unlock(&egalock); |
156 | spinlock_unlock(&egalock); |
157 | interrupts_restore(ipl); |
157 | interrupts_restore(ipl); |
158 | } |
158 | } |
159 | 159 | ||
160 | void ega_move_cursor(void) |
160 | void ega_move_cursor(void) |
161 | { |
161 | { |
162 | outb(ega_base + EGA_INDEX_REG, 0xe); |
162 | outb(ega_base + EGA_INDEX_REG, 0xe); |
163 | outb(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff)); |
163 | outb(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff)); |
164 | outb(ega_base + EGA_INDEX_REG, 0xf); |
164 | outb(ega_base + EGA_INDEX_REG, 0xf); |
165 | outb(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff)); |
165 | outb(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff)); |
166 | } |
166 | } |
167 | 167 | ||
168 | void ega_redraw(void) |
168 | void ega_redraw(void) |
169 | { |
169 | { |
170 | memcpy(videoram, backbuf, SCREEN * 2); |
170 | memcpy(videoram, backbuf, SCREEN * 2); |
171 | ega_move_cursor(); |
171 | ega_move_cursor(); |
172 | } |
172 | } |
173 | 173 | ||
174 | /** @} |
174 | /** @} |
175 | */ |
175 | */ |
176 | 176 |