vgatables.h

   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 const u8 vgafont8[];
 159 extern const u8 vgafont14[];
 160 extern const u8 vgafont16[];
 161 extern const u8 vgafont14alt[];
 162 extern const 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