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1.1 root 1: /* VGA register definitions
2:
3: This file is copied (somewhat) intact from SeaBIOS.
4: It is covered by the GNU Lesser General Public License, v3.
5:
6: You should have received a copy of the GNU Lesser General Public License
7: along with this program; see the file COPYING. If not see
8: <http://www.gnu.org/licenses/>. */
9:
10: #ifndef VGATABLES_H
11: #define VGATABLES_H
12:
13: typedef uint8_t u8;
14: typedef uint16_t u16;
15:
16:
17: /*
18: *
19: * VGA registers
20: *
21: */
22: #define VGAREG_ACTL_ADDRESS 0x3c0
23: #define VGAREG_ACTL_WRITE_DATA 0x3c0
24: #define VGAREG_ACTL_READ_DATA 0x3c1
25:
26: #define VGAREG_INPUT_STATUS 0x3c2
27: #define VGAREG_WRITE_MISC_OUTPUT 0x3c2
28: #define VGAREG_VIDEO_ENABLE 0x3c3
29: #define VGAREG_SEQU_ADDRESS 0x3c4
30: #define VGAREG_SEQU_DATA 0x3c5
31:
32: #define VGAREG_PEL_MASK 0x3c6
33: #define VGAREG_DAC_STATE 0x3c7
34: #define VGAREG_DAC_READ_ADDRESS 0x3c7
35: #define VGAREG_DAC_WRITE_ADDRESS 0x3c8
36: #define VGAREG_DAC_DATA 0x3c9
37:
38: #define VGAREG_READ_FEATURE_CTL 0x3ca
39: #define VGAREG_READ_MISC_OUTPUT 0x3cc
40:
41: #define VGAREG_GRDC_ADDRESS 0x3ce
42: #define VGAREG_GRDC_DATA 0x3cf
43:
44: #define VGAREG_MDA_CRTC_ADDRESS 0x3b4
45: #define VGAREG_MDA_CRTC_DATA 0x3b5
46: #define VGAREG_VGA_CRTC_ADDRESS 0x3d4
47: #define VGAREG_VGA_CRTC_DATA 0x3d5
48:
49: #define VGAREG_MDA_WRITE_FEATURE_CTL 0x3ba
50: #define VGAREG_VGA_WRITE_FEATURE_CTL 0x3da
51: #define VGAREG_ACTL_RESET 0x3da
52:
53: #define VGAREG_MDA_MODECTL 0x3b8
54: #define VGAREG_CGA_MODECTL 0x3d8
55: #define VGAREG_CGA_PALETTE 0x3d9
56:
57: /* Video memory */
58: #define SEG_GRAPH 0xA000
59: #define SEG_CTEXT 0xB800
60: #define SEG_MTEXT 0xB000
61:
62: /*
63: * Tables of default values for each mode
64: */
65: #define TEXT 0x80
66:
67: #define CTEXT (0x00 | TEXT)
68: #define MTEXT (0x01 | TEXT)
69: #define CGA 0x02
70: #define PLANAR1 0x03
71: #define PLANAR4 0x04
72: #define LINEAR8 0x05
73:
74: // for SVGA
75: #define LINEAR15 0x10
76: #define LINEAR16 0x11
77: #define LINEAR24 0x12
78: #define LINEAR32 0x13
79:
80: #define SCREEN_IO_START(x,y,p) (((((x)*(y)) | 0x00ff) + 1) * (p))
81: #define SCREEN_MEM_START(x,y,p) SCREEN_IO_START(((x)*2),(y),(p))
82:
83: /* standard BIOS Video Parameter Table */
84: struct VideoParam_s {
85: u8 twidth;
86: u8 theightm1;
87: u8 cheight;
88: u16 slength;
89: u8 sequ_regs[4];
90: u8 miscreg;
91: u8 crtc_regs[25];
92: u8 actl_regs[20];
93: u8 grdc_regs[9];
94: } PACKED;
95:
96: struct vgamode_s {
97: u8 svgamode;
98: struct VideoParam_s *vparam;
99: u8 memmodel; /* CTEXT,MTEXT,CGA,PL1,PL2,PL4,P8,P15,P16,P24,P32 */
100: u8 pixbits;
101: u16 sstart;
102: u8 pelmask;
103: u8 *dac;
104: u16 dacsize;
105: };
106:
107: struct saveVideoHardware {
108: u8 sequ_index;
109: u8 crtc_index;
110: u8 grdc_index;
111: u8 actl_index;
112: u8 feature;
113: u8 sequ_regs[4];
114: u8 sequ0;
115: u8 crtc_regs[25];
116: u8 actl_regs[20];
117: u8 grdc_regs[9];
118: u16 crtc_addr;
119: u8 plane_latch[4];
120: };
121:
122: struct saveBDAstate {
123: u8 video_mode;
124: u16 video_cols;
125: u16 video_pagesize;
126: u16 crtc_address;
127: u8 video_rows;
128: u16 char_height;
129: u8 video_ctl;
130: u8 video_switches;
131: u8 modeset_ctl;
132: u16 cursor_type;
133: u16 cursor_pos[8];
134: u16 video_pagestart;
135: u8 video_page;
136: #if 0
137: /* current font */
138: struct segoff_s font0;
139: struct segoff_s font1;
140: #endif
141: };
142:
143: struct saveDACcolors {
144: u8 rwmode;
145: u8 peladdr;
146: u8 pelmask;
147: u8 dac[768];
148: u8 color_select;
149: };
150:
151: // vgatables.c
152: struct vgamode_s *find_vga_entry(u8 mode);
153: extern u16 video_save_pointer_table[];
154: extern struct VideoParam_s video_param_table[];
155: extern u8 static_functionality[];
156:
157: // vgafonts.c
158: extern u8 vgafont8[];
159: extern u8 vgafont14[];
160: extern u8 vgafont16[];
161: extern u8 vgafont14alt[];
162: extern u8 vgafont16alt[];
163:
164: // vga.c
165: struct carattr {
166: u8 car, attr, use_attr;
167: };
168: struct cursorpos {
169: u8 x, y, page;
170: };
171:
172: // vgafb.c
173: void clear_screen(struct vgamode_s *vmode_g);
174: void vgafb_scroll(int nblines, int attr
175: , struct cursorpos ul, struct cursorpos lr);
176: void vgafb_write_char(struct cursorpos cp, struct carattr ca);
177: struct carattr vgafb_read_char(struct cursorpos cp);
178: void vgafb_write_pixel(u8 color, u16 x, u16 y);
179: u8 vgafb_read_pixel(u16 x, u16 y);
180: void vgafb_load_font(u16 seg, void *src_far, u16 count
181: , u16 start, u8 destflags, u8 fontsize);
182:
183: // vgaio.c
184: void vgahw_screen_disable(void);
185: void vgahw_screen_enable(void);
186: void vgahw_set_border_color(u8 color);
187: void vgahw_set_overscan_border_color(u8 color);
188: u8 vgahw_get_overscan_border_color(void);
189: void vgahw_set_palette(u8 palid);
190: void vgahw_set_single_palette_reg(u8 reg, u8 val);
191: u8 vgahw_get_single_palette_reg(u8 reg);
192: void vgahw_set_all_palette_reg(u8 *data);
193: void vgahw_get_all_palette_reg(u8 *data);
194: void vgahw_toggle_intensity(u8 flag);
195: void vgahw_select_video_dac_color_page(u8 flag, u8 data);
196: void vgahw_read_video_dac_state(u8 *pmode, u8 *curpage);
197: void vgahw_set_dac_regs(u8 *data, u8 start, int count);
198: void vgahw_get_dac_regs(u8 *data, u8 start, int count);
199: void vgahw_set_pel_mask(u8 val);
200: u8 vgahw_get_pel_mask(void);
201: void vgahw_save_dac_state(struct saveDACcolors *info);
202: void vgahw_restore_dac_state(struct saveDACcolors *info);
203: void vgahw_sequ_write(u8 index, u8 value);
204: void vgahw_grdc_write(u8 index, u8 value);
205: void vgahw_set_text_block_specifier(u8 spec);
206: void get_font_access(void);
207: void release_font_access(void);
208: void vgahw_set_cursor_shape(u8 start, u8 end);
209: void vgahw_set_active_page(u16 address);
210: void vgahw_set_cursor_pos(u16 address);
211: void vgahw_set_scan_lines(u8 lines);
212: u16 vgahw_get_vde(void);
213: void vgahw_save_state(struct saveVideoHardware *info);
214: void vgahw_restore_state(struct saveVideoHardware *info);
215: void vgahw_set_mode(struct VideoParam_s *vparam_g);
216: void vgahw_enable_video_addressing(u8 disable);
217: void vgahw_init(void);
218:
219: // clext.c
220: void cirrus_set_video_mode(u8 mode);
221: void cirrus_init(void);
222:
223: #endif // vgatables.h
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