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Line 36... | Line 36... | ||
36 | 36 | ||
37 | #include <arch/drivers/ega.h> |
37 | #include <arch/drivers/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 <arch/mm/page.h> |
42 | #include <arch/mm/page.h> |
42 | #include <synch/spinlock.h> |
43 | #include <synch/spinlock.h> |
43 | #include <arch/types.h> |
44 | #include <arch/types.h> |
44 | #include <arch/asm.h> |
45 | #include <arch/asm.h> |
45 | #include <memstr.h> |
46 | #include <memstr.h> |
Line 56... | Line 57... | ||
56 | 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. */ |
57 | 58 | ||
58 | SPINLOCK_INITIALIZE(egalock); |
59 | SPINLOCK_INITIALIZE(egalock); |
59 | static uint32_t ega_cursor; |
60 | static uint32_t ega_cursor; |
60 | static uint8_t *videoram; |
61 | static uint8_t *videoram; |
- | 62 | static uint8_t *backbuf; |
|
61 | 63 | ||
62 | static void ega_putchar(chardev_t *d, const char ch); |
64 | static void ega_putchar(chardev_t *d, const char ch); |
63 | 65 | ||
64 | chardev_t ega_console; |
66 | chardev_t ega_console; |
65 | static chardev_operations_t ega_ops = { |
67 | static chardev_operations_t ega_ops = { |
Line 70... | Line 72... | ||
70 | 72 | ||
71 | void ega_init(void) |
73 | void ega_init(void) |
72 | { |
74 | { |
73 | uint8_t hi, lo; |
75 | uint8_t hi, lo; |
74 | 76 | ||
- | 77 | backbuf = (uint8_t *) malloc(SCREEN * 2, 0); |
|
- | 78 | if (!backbuf) |
|
- | 79 | panic("Unable to allocate backbuffer.\n"); |
|
- | 80 | ||
75 | videoram = (uint8_t *) hw_map(VIDEORAM, SCREEN * 2); |
81 | videoram = (uint8_t *) hw_map(VIDEORAM, SCREEN * 2); |
76 | outb(0x3d4, 0xe); |
82 | outb(0x3d4, 0xe); |
77 | hi = inb(0x3d5); |
83 | hi = inb(0x3d5); |
78 | outb(0x3d4, 0xf); |
84 | outb(0x3d4, 0xf); |
79 | lo = inb(0x3d5); |
85 | lo = inb(0x3d5); |
Line 96... | Line 102... | ||
96 | } |
102 | } |
97 | 103 | ||
98 | static void ega_display_char(char ch) |
104 | static void ega_display_char(char ch) |
99 | { |
105 | { |
100 | videoram[ega_cursor * 2] = ch; |
106 | videoram[ega_cursor * 2] = ch; |
- | 107 | backbuf[ega_cursor * 2] = ch; |
|
101 | } |
108 | } |
102 | 109 | ||
103 | /* |
110 | /* |
104 | * This function takes care of scrolling. |
111 | * This function takes care of scrolling. |
105 | */ |
112 | */ |
106 | static void ega_check_cursor(void) |
113 | static void ega_check_cursor(void) |
107 | { |
114 | { |
108 | if (ega_cursor < SCREEN) |
115 | if (ega_cursor < SCREEN) |
109 | return; |
116 | return; |
110 | 117 | ||
111 | memcpy((void *) videoram, (void *) (videoram + ROW * 2), (SCREEN - ROW) * 2); |
118 | memmove((void *) videoram, (void *) (videoram + ROW * 2), (SCREEN - ROW) * 2); |
- | 119 | memmove((void *) backbuf, (void *) (backbuf + ROW * 2), (SCREEN - ROW) * 2); |
|
112 | memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720); |
120 | memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720); |
- | 121 | memsetw(backbuf + (SCREEN - ROW) * 2, ROW, 0x0720); |
|
113 | ega_cursor = ega_cursor - ROW; |
122 | ega_cursor = ega_cursor - ROW; |
114 | } |
123 | } |
115 | 124 | ||
116 | void ega_putchar(chardev_t *d __attribute__((unused)), const char ch) |
125 | void ega_putchar(chardev_t *d __attribute__((unused)), const char ch) |
117 | { |
126 | { |
Line 149... | Line 158... | ||
149 | outb(0x3d5, (uint8_t) ((ega_cursor >> 8) & 0xff)); |
158 | outb(0x3d5, (uint8_t) ((ega_cursor >> 8) & 0xff)); |
150 | outb(0x3d4, 0xf); |
159 | outb(0x3d4, 0xf); |
151 | outb(0x3d5, (uint8_t) (ega_cursor & 0xff)); |
160 | outb(0x3d5, (uint8_t) (ega_cursor & 0xff)); |
152 | } |
161 | } |
153 | 162 | ||
- | 163 | void ega_redraw(void) |
|
- | 164 | { |
|
- | 165 | memcpy(videoram, backbuf, SCREEN * 2); |
|
- | 166 | ega_move_cursor(); |
|
- | 167 | } |
|
- | 168 | ||
154 | /** @} |
169 | /** @} |
155 | */ |
170 | */ |