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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 | chardev_t ega_console; |
65 | chardev_t ega_console; |
66 | 66 | ||
67 | /* |
67 | /* |
68 | * This function takes care of scrolling. |
68 | * This function takes care of scrolling. |
69 | */ |
69 | */ |
70 | static void ega_check_cursor(void) |
70 | static void ega_check_cursor(void) |
71 | { |
71 | { |
72 | if (ega_cursor < SCREEN) |
72 | if (ega_cursor < SCREEN) |
73 | return; |
73 | return; |
74 | 74 | ||
75 | memmove((void *) videoram, (void *) (videoram + ROW * 2), |
75 | memmove((void *) videoram, (void *) (videoram + ROW * 2), |
76 | (SCREEN - ROW) * 2); |
76 | (SCREEN - ROW) * 2); |
77 | memmove((void *) backbuf, (void *) (backbuf + ROW * 2), |
77 | memmove((void *) backbuf, (void *) (backbuf + ROW * 2), |
78 | (SCREEN - ROW) * 2); |
78 | (SCREEN - ROW) * 2); |
79 | memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720); |
79 | memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720); |
80 | memsetw(backbuf + (SCREEN - ROW) * 2, ROW, 0x0720); |
80 | memsetw(backbuf + (SCREEN - ROW) * 2, ROW, 0x0720); |
81 | ega_cursor = ega_cursor - ROW; |
81 | ega_cursor = ega_cursor - ROW; |
82 | } |
82 | } |
83 | 83 | ||
84 | static void ega_move_cursor(void) |
84 | static void ega_move_cursor(void) |
85 | { |
85 | { |
86 | outb(ega_base + EGA_INDEX_REG, 0xe); |
86 | pio_write_8(ega_base + EGA_INDEX_REG, 0xe); |
87 | outb(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff)); |
87 | pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff)); |
88 | outb(ega_base + EGA_INDEX_REG, 0xf); |
88 | pio_write_8(ega_base + EGA_INDEX_REG, 0xf); |
89 | outb(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff)); |
89 | pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff)); |
90 | } |
90 | } |
91 | 91 | ||
92 | static void ega_display_char(char ch, bool silent) |
92 | static void ega_display_char(char ch, bool silent) |
93 | { |
93 | { |
94 | backbuf[ega_cursor * 2] = ch; |
94 | backbuf[ega_cursor * 2] = ch; |
95 | 95 | ||
96 | if (!silent) |
96 | if (!silent) |
97 | videoram[ega_cursor * 2] = ch; |
97 | videoram[ega_cursor * 2] = ch; |
98 | } |
98 | } |
99 | 99 | ||
100 | static void ega_putchar(chardev_t *d __attribute__((unused)), const char ch, bool silent) |
100 | static void ega_putchar(chardev_t *d __attribute__((unused)), const char ch, bool silent) |
101 | { |
101 | { |
102 | ipl_t ipl; |
102 | ipl_t ipl; |
103 | 103 | ||
104 | ipl = interrupts_disable(); |
104 | ipl = interrupts_disable(); |
105 | spinlock_lock(&egalock); |
105 | spinlock_lock(&egalock); |
106 | 106 | ||
107 | switch (ch) { |
107 | switch (ch) { |
108 | case '\n': |
108 | case '\n': |
109 | ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW; |
109 | ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW; |
110 | break; |
110 | break; |
111 | case '\t': |
111 | case '\t': |
112 | ega_cursor = (ega_cursor + 8) - ega_cursor % 8; |
112 | ega_cursor = (ega_cursor + 8) - ega_cursor % 8; |
113 | break; |
113 | break; |
114 | case '\b': |
114 | case '\b': |
115 | if (ega_cursor % ROW) |
115 | if (ega_cursor % ROW) |
116 | ega_cursor--; |
116 | ega_cursor--; |
117 | break; |
117 | break; |
118 | default: |
118 | default: |
119 | ega_display_char(ch, silent); |
119 | ega_display_char(ch, silent); |
120 | ega_cursor++; |
120 | ega_cursor++; |
121 | break; |
121 | break; |
122 | } |
122 | } |
123 | ega_check_cursor(); |
123 | ega_check_cursor(); |
124 | 124 | ||
125 | if (!silent) |
125 | if (!silent) |
126 | ega_move_cursor(); |
126 | ega_move_cursor(); |
127 | 127 | ||
128 | spinlock_unlock(&egalock); |
128 | spinlock_unlock(&egalock); |
129 | interrupts_restore(ipl); |
129 | interrupts_restore(ipl); |
130 | } |
130 | } |
131 | 131 | ||
132 | static chardev_operations_t ega_ops = { |
132 | static chardev_operations_t ega_ops = { |
133 | .write = ega_putchar |
133 | .write = ega_putchar |
134 | }; |
134 | }; |
135 | 135 | ||
136 | void ega_init(ioport_t base, uintptr_t videoram_phys) |
136 | void ega_init(ioport_t base, uintptr_t videoram_phys) |
137 | { |
137 | { |
138 | /* Initialize the software structure. */ |
138 | /* Initialize the software structure. */ |
139 | ega_base = base; |
139 | ega_base = base; |
140 | 140 | ||
141 | backbuf = (uint8_t *) malloc(SCREEN * 2, 0); |
141 | backbuf = (uint8_t *) malloc(SCREEN * 2, 0); |
142 | if (!backbuf) |
142 | if (!backbuf) |
143 | panic("Unable to allocate backbuffer."); |
143 | panic("Unable to allocate backbuffer."); |
144 | 144 | ||
145 | videoram = (uint8_t *) hw_map(videoram_phys, SCREEN * 2); |
145 | videoram = (uint8_t *) hw_map(videoram_phys, SCREEN * 2); |
146 | 146 | ||
147 | /* Clear the screen and set the cursor position. */ |
147 | /* Clear the screen and set the cursor position. */ |
148 | memsetw(videoram, SCREEN, 0x0720); |
148 | memsetw(videoram, SCREEN, 0x0720); |
149 | memsetw(backbuf, SCREEN, 0x0720); |
149 | memsetw(backbuf, SCREEN, 0x0720); |
150 | ega_move_cursor(); |
150 | ega_move_cursor(); |
151 | 151 | ||
152 | chardev_initialize("ega_out", &ega_console, &ega_ops); |
152 | chardev_initialize("ega_out", &ega_console, &ega_ops); |
153 | stdout = &ega_console; |
153 | stdout = &ega_console; |
154 | 154 | ||
155 | ega_parea.pbase = videoram_phys; |
155 | ega_parea.pbase = videoram_phys; |
156 | ega_parea.vbase = (uintptr_t) videoram; |
156 | ega_parea.vbase = (uintptr_t) videoram; |
157 | ega_parea.frames = 1; |
157 | ega_parea.frames = 1; |
158 | ega_parea.cacheable = false; |
158 | ega_parea.cacheable = false; |
159 | ddi_parea_register(&ega_parea); |
159 | ddi_parea_register(&ega_parea); |
160 | 160 | ||
161 | sysinfo_set_item_val("fb", NULL, true); |
161 | sysinfo_set_item_val("fb", NULL, true); |
162 | sysinfo_set_item_val("fb.kind", NULL, 2); |
162 | sysinfo_set_item_val("fb.kind", NULL, 2); |
163 | sysinfo_set_item_val("fb.width", NULL, ROW); |
163 | sysinfo_set_item_val("fb.width", NULL, ROW); |
164 | sysinfo_set_item_val("fb.height", NULL, ROWS); |
164 | sysinfo_set_item_val("fb.height", NULL, ROWS); |
165 | sysinfo_set_item_val("fb.blinking", NULL, true); |
165 | sysinfo_set_item_val("fb.blinking", NULL, true); |
166 | sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys); |
166 | sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys); |
167 | } |
167 | } |
168 | 168 | ||
169 | void ega_redraw(void) |
169 | void ega_redraw(void) |
170 | { |
170 | { |
171 | memcpy(videoram, backbuf, SCREEN * 2); |
171 | memcpy(videoram, backbuf, SCREEN * 2); |
172 | ega_move_cursor(); |
172 | ega_move_cursor(); |
173 | } |
173 | } |
174 | 174 | ||
175 | /** @} |
175 | /** @} |
176 | */ |
176 | */ |
177 | 177 |