usr.bin/doscmd/video.h

   1 /*
   2  * Copyright (c) 1992, 1993, 1996
   3  *      Berkeley Software Design, Inc.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Berkeley Software
  16  *      Design, Inc.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  *      BSDI video.h,v 2.2 1996/04/08 19:33:12 bostic Exp
  31  *
  32  * $FreeBSD: src/usr.bin/doscmd/video.h,v 1.2.2.1 2002/04/25 11:04:51 tg Exp $
  33  * $DragonFly: src/usr.bin/doscmd/video.h,v 1.2 2003/06/17 04:29:26 dillon Exp $
  34  */
  35
  36 /*
  37  * The VGA CRT Controller
  38  */
  39 extern u_int8_t VGA_CRTC[];
  40
  41 /* CRTC registers
  42
  43    We use the VGA register functions and don't care about the MDA. We also
  44    leave out the undocumented registers at 0x22, 0x24, 0x3?. */
  45 #define CRTC_HorzTotal          0x00
  46 #define CRTC_HorzDispEnd        0x01
  47 #define CRTC_StartHorzBlank     0x02
  48 #define CRTC_EndHorzBlank       0x03
  49 #define CRTC_StartHorzRetrace   0x04
  50 #define CRTC_EndHorzRetrace     0x05
  51 #define CRTC_VertTotal          0x06
  52 #define CRTC_Overflow           0x07
  53 #define CRTC_ResetRowScan       0x08
  54 #define CRTC_MaxScanLine        0x09
  55 #define CRTC_CursStart          0x0a
  56 #define CRTC_CursEnd            0x0b
  57 #define CRTC_StartAddrHi        0x0c
  58 #define CRTC_StartAddrLo        0x0d
  59 #define CRTC_CurLocHi           0x0e
  60 #define CRTC_CurLocLo           0x0f
  61 #define CRTC_StartVertRetrace   0x10
  62 #define CRTC_EndVertRetrace     0x11
  63 #define CRTC_VertDispEnd        0x12
  64 #define CRTC_Offset             0x13
  65 #define CRTC_UnderlineLoc       0x14
  66 #define CRTC_StartVertBlank     0x15
  67 #define CRTC_EndVertBlank       0x16
  68 #define CRTC_ModeCtrl           0x17
  69 #define CRTC_LineCompare        0x18
  70
  71 #define CRTC_Size               0x19
  72
  73 /* Port addresses for the CRTC
  74
  75    The registers are read by
  76         OUT index_port, reg_nr
  77         IN  data_port, res
  78
  79    They are written by
  80         OUT index_port, reg_nr
  81         OUT data_port, value
  82 */
  83
  84 #define CRTC_IndexPortColor     0x03d4  /* CRTC Address Register (Color) */
  85 #define CRTC_DataPortColor      0x03d5  /* CRTC Data Register (Color) */
  86 #define CRTC_IndexPortMono      0x03b4  /* CRTC Address Register (Mono) */
  87 #define CRTC_DataPortMono       0x03b5  /* CRTC Data Register (Mono) */
  88
  89 /*
  90  * VGA Attribute Controller
  91  */
  92 extern u_int8_t VGA_ATC[];
  93
  94 /* ATC registers
  95
  96    The palette registers are here for completeness. We'll always use a
  97    separate array 'palette[]' to access them in our code. */
  98 #define ATC_Palette0            0x00
  99 #define ATC_Palette1            0x01
 100 #define ATC_Palette2            0x02
 101 #define ATC_Palette3            0x03
 102 #define ATC_Palette4            0x04
 103 #define ATC_Palette5            0x05
 104 #define ATC_Palette6            0x06
 105 #define ATC_Palette7            0x07
 106 #define ATC_Palette8            0x08
 107 #define ATC_Palette9            0x09
 108 #define ATC_PaletteA            0x0a
 109 #define ATC_PaletteB            0x0b
 110 #define ATC_PaletteC            0x0c
 111 #define ATC_PaletteD            0x0d
 112 #define ATC_PaletteE            0x0e
 113 #define ATC_PaletteF            0x0f
 114 #define ATC_ModeCtrl            0x10
 115 #define ATC_OverscanColor       0x11
 116 #define ATC_ColorPlaneEnable    0x12
 117 #define ATC_HorzPixelPanning    0x13
 118 #define ATC_ColorSelect         0x14
 119
 120 #define ATC_Size                0x15
 121
 122 /* Port addresses for the ATC
 123
 124    The ATC has a combined index/data port at 0x03c0. To quote from Ralf
 125    Brown's ports list: ``Every write access to this register will toggle an
 126    internal index/data selection flipflop, so that consecutive writes to index
 127    & data is possible through this port. To get a defined start condition,
 128    each read access to the input status register #1 (3BAh in mono / 3DAh in
 129    color) resets the flipflop to load index.'' */
 130 #define ATC_WritePort           0x03c0
 131 #define ATC_ReadPort            0x03c1
 132
 133 /*
 134  * VGA Sequencer Controller
 135  */
 136 extern u_int8_t VGA_TSC[];
 137
 138 /* TSC registers
 139
 140    We leave out the undocumented register at 0x07. */
 141 #define TSC_Reset               0x00
 142 #define TSC_ClockingMode        0x01
 143 #define TSC_MapMask             0x02
 144 #define TSC_CharMapSelect       0x03
 145 #define TSC_MemoryMode          0x04
 146
 147 #define TSC_Size                0x05
 148
 149 /* Port addresses for the TSC */
 150 #define TSC_IndexPort           0x03c4
 151 #define TSC_DataPort            0x03c5
 152
 153 /*
 154  * VGA Graphics Controller
 155  */
 156 extern u_int8_t VGA_GDC[];
 157
 158 /* GDC registers */
 159 #define GDC_SetReset            0x00
 160 #define GDC_EnableSetReset      0x01
 161 #define GDC_ColorCompare        0x02
 162 #define GDC_DataRotate          0x03
 163 #define GDC_ReadMapSelect       0x04
 164 #define GDC_Mode                0x05
 165 #define GDC_Misc                0x06
 166 #define GDC_ColorDontCare       0x07
 167 #define GDC_BitMask             0x08
 168
 169 #define GDC_Size                0x09
 170
 171 /* Port addresses for the GDC */
 172 #define GDC_IndexPort           0x03ce
 173 #define GDC_DataPort            0x03cf
 174
 175 /*
 176  * Miscellaneous VGA registers
 177  */
 178 u_int8_t VGA_InputStatus0;
 179 u_int8_t VGA_InputStatus1;
 180 u_int8_t VGA_MiscOutput;
 181
 182 u_int8_t VGA_DAC_PELData;
 183 u_int8_t VGA_DAC_PELMask;
 184 u_int8_t VGA_DAC_PELReadAddr;
 185 u_int8_t VGA_DAC_PELWriteAddr;
 186 u_int8_t VGA_DAC_State;
 187
 188 /* Port addresses for miscellaneous VGA registers */
 189 #define VGA_InputStatus0Port            0x03c2  /* Read-only */
 190 #define VGA_InputStatus1Port            0x03da  /* Read-only */
 191 #define VGA_MiscOutputPortW             0x03c2  /* Write-only */
 192 #define VGA_MiscOutputPortR             0x03cc  /* Read-only */
 193
 194 /* Port addresses for VGA DAC registers */
 195 #define VGA_DAC_PELDataPort             0x03c9  /* Read/Write */
 196 #define VGA_DAC_PELMaskPort             0x03c6  /* Read/Write */
 197 #define VGA_DAC_PELReadAddrPort         0x03c7  /* Write-only */
 198 #define VGA_DAC_PELWriteAddrPort        0x03c8  /* Read/Write */
 199 #define VGA_DAC_StatePortOut            0x03c7  /* Read-only */
 200
 201 /*
 202  * Additional variables and type definitions
 203  */
 204
 205 /* To ease access to the palette registers, 'palette[]' will overlay the
 206    Attribute Controller space. */
 207 u_int8_t *palette;
 208
 209 /* Entry type for the DAC table. Each value is actually 6 bits wide. */
 210 struct dac_colors {
 211     u_int8_t red;
 212     u_int8_t green;
 213     u_int8_t blue;
 214 };
 215
 216 /* We need a working copy of the default DAC table. This is filled from
 217    'dac_default{64,256}[]' in 'video.c:init_vga()'. */
 218 struct dac_colors *dac_rgb;
 219
 220 /*
 221  * Video memory
 222  *
 223  * The video memory of a standard VGA card is 256K. For the standard modes,
 224  * this is divided into four planes of 64K which are accessed according to the
 225  * GDC state. Mode 0x13 will also fit within 64K. The higher resolution modes
 226  * (VESA) require a bit more sophistication; we leave that for later
 227  * implementation.
 228  */
 229
 230 /* Video RAM */
 231 u_int8_t *vram;
 232
 233 /* Pointers to the four bit planes */
 234 u_int8_t *vplane0;
 235 u_int8_t *vplane1;
 236 u_int8_t *vplane2;
 237 u_int8_t *vplane3;
 238
 239 /* Pointer to the video memory. The base address varies with the video mode.
 240    'vmem' is used directly only in the text modes; in the graphics modes, all
 241    writes go to 'vram'. */
 242 u_int16_t *vmem;
 243
 244 /*
 245  * VGA status information
 246  *
 247  * Int 10:1b returns a 64 byte block of status info for the VGA card. This
 248  * block also contains a couple of BIOS variables, so we will use it for
 249  * general housekeeping.
 250  */
 251 extern u_int8_t vga_status[];
 252
 253 /* Access to the VGA status fields. */
 254 #define StaticFuncTbl           *(u_int32_t *)&vga_status[0]
 255 #define VideoMode               *(u_int8_t *)&vga_status[4]
 256 #define DpyCols                 *(u_int16_t *)&vga_status[5]
 257 #define DpyPageSize             *(u_int16_t *)&vga_status[7]
 258 #define ActivePageOfs           *(u_int16_t *)&vga_status[9]
 259 #define CursCol0                *(u_int8_t *)&vga_status[11]
 260 #define CursRow0                *(u_int8_t *)&vga_status[12]
 261 #define CursCol1                *(u_int8_t *)&vga_status[13]
 262 #define CursRow1                *(u_int8_t *)&vga_status[14]
 263 #define CursCol2                *(u_int8_t *)&vga_status[15]
 264 #define CursRow2                *(u_int8_t *)&vga_status[16]
 265 #define CursCol3                *(u_int8_t *)&vga_status[17]
 266 #define CursRow3                *(u_int8_t *)&vga_status[18]
 267 #define CursCol4                *(u_int8_t *)&vga_status[19]
 268 #define CursRow4                *(u_int8_t *)&vga_status[20]
 269 #define CursCol5                *(u_int8_t *)&vga_status[21]
 270 #define CursRow5                *(u_int8_t *)&vga_status[22]
 271 #define CursCol6                *(u_int8_t *)&vga_status[23]
 272 #define CursRow6                *(u_int8_t *)&vga_status[24]
 273 #define CursCol7                *(u_int8_t *)&vga_status[25]
 274 #define CursRow7                *(u_int8_t *)&vga_status[26]
 275 #define CursStart               *(u_int8_t *)&vga_status[27]
 276 #define CursEnd                 *(u_int8_t *)&vga_status[28]
 277 #define ActivePage              *(u_int8_t *)&vga_status[29]
 278 #define CRTCPort                *(u_int16_t *)&vga_status[30]
 279 #define CGA_ModeCtrl            *(u_int8_t *)&vga_status[32]
 280 #define CGA_ColorSelect         *(u_int8_t *)&vga_status[33]
 281 #define DpyRows                 *(u_int8_t *)&vga_status[34]
 282 #define CharHeight              *(u_int16_t *)&vga_status[35]
 283 #define ActiveDCC               *(u_int8_t *)&vga_status[37]
 284 #define SecondDCC               *(u_int8_t *)&vga_status[38]
 285 #define NumColors               *(u_int16_t *)&vga_status[39]
 286 #define NumPages                *(u_int8_t *)&vga_status[41]
 287 #define VertResolution          *(u_int8_t *)&vga_status[42]
 288 #define PrimaryCharset          *(u_int8_t *)&vga_status[43]
 289 #define SecondaryCharset        *(u_int8_t *)&vga_status[44]
 290 #define MiscStatus              *(u_int8_t *)&vga_status[45]
 291 /*
 292 #define Reserved1               *(u_int16_t *)&vga_status[46]
 293 #define Reserved2               *(u_int8_t *)&vga_status[48]
 294 */
 295 #define VMemSize                *(u_int8_t *)&vga_status[49]
 296 #define SavePointerStatus       *(u_int8_t *)&vga_status[50]
 297
 298 /* VGA Static Functionality Table
 299
 300    This table contains mode-independent VGA status information. It is actually
 301    defined in 'vparam.h'; the declaration here is just for completeness. */
 302 extern u_int8_t static_functionality_tbl[];
 303
 304 /* Add some names for the VGA related BIOS variables. */
 305 #define BIOS_VideoMode          *(u_int8_t *)&BIOSDATA[0x49]
 306 #define BIOS_DpyCols            *(u_int16_t *)&BIOSDATA[0x4a]
 307 #define BIOS_DpyPageSize        *(u_int16_t *)&BIOSDATA[0x4c]
 308 #define BIOS_ActivePageOfs      *(u_int16_t *)&BIOSDATA[0x4e]
 309 #define BIOS_CursCol0           *(u_int8_t *)&BIOSDATA[0x50]
 310 #define BIOS_CursRow0           *(u_int8_t *)&BIOSDATA[0x51]
 311 #define BIOS_CursCol1           *(u_int8_t *)&BIOSDATA[0x52]
 312 #define BIOS_CursRow1           *(u_int8_t *)&BIOSDATA[0x53]
 313 #define BIOS_CursCol2           *(u_int8_t *)&BIOSDATA[0x54]
 314 #define BIOS_CursRow2           *(u_int8_t *)&BIOSDATA[0x55]
 315 #define BIOS_CursCol3           *(u_int8_t *)&BIOSDATA[0x56]
 316 #define BIOS_CursRow3           *(u_int8_t *)&BIOSDATA[0x57]
 317 #define BIOS_CursCol4           *(u_int8_t *)&BIOSDATA[0x58]
 318 #define BIOS_CursRow4           *(u_int8_t *)&BIOSDATA[0x59]
 319 #define BIOS_CursCol5           *(u_int8_t *)&BIOSDATA[0x5a]
 320 #define BIOS_CursRow5           *(u_int8_t *)&BIOSDATA[0x5b]
 321 #define BIOS_CursCol6           *(u_int8_t *)&BIOSDATA[0x5c]
 322 #define BIOS_CursRow6           *(u_int8_t *)&BIOSDATA[0x5d]
 323 #define BIOS_CursCol7           *(u_int8_t *)&BIOSDATA[0x5e]
 324 #define BIOS_CursRow7           *(u_int8_t *)&BIOSDATA[0x5f]
 325 #define BIOS_CursStart          *(u_int8_t *)&BIOSDATA[0x60]
 326 #define BIOS_CursEnd            *(u_int8_t *)&BIOSDATA[0x61]
 327 #define BIOS_ActivePage         *(u_int8_t *)&BIOSDATA[0x62]
 328 #define BIOS_CRTCPort           *(u_int16_t *)&BIOSDATA[0x63]
 329 #define BIOS_CGA_ModeCtrl       *(u_int8_t *)&BIOSDATA[0x65]
 330 #define BIOS_CGA_ColorSelect    *(u_int8_t *)&BIOSDATA[0x66]
 331 #define BIOS_DpyRows            *(u_int8_t *)&BIOSDATA[0x84]
 332 #define BIOS_CharHeight         *(u_int16_t *)&BIOSDATA[0x85]
 333 #define BIOS_SaveTablePointer   *(u_int32_t *)&BIOSDATA[0xa8]
 334
 335 /*
 336  * Video modes
 337  *
 338  * This started as a big 'switch' statement in 'video.c:init_mode()' which
 339  * soon became too ugly and unmanagable. So, we collect all mode related
 340  * information in one table and define a couple of helper function to access
 341  * it. This will also benefit the VESA support, whenever we get to that.
 342  */
 343 typedef struct {
 344     int modenumber;             /* Mode number */
 345     int paramindex;             /* Index into the parameter table */
 346     int type;                   /* Text or Graphics */
 347     int numcolors;              /* Number of colors */
 348     int numpages;               /* Number of display pages */
 349     int vrescode;               /* 0 = 200, 1 = 350, 2 = 400, 3 = 480 */
 350     u_int32_t vmemaddr;         /* Video memory address */
 351     const char *fontname;       /* Font name */
 352 } vmode_t;
 353
 354 /* Types. 'NOMODE' is one of the 'forbidden' internal modes. */
 355 #define TEXT            0
 356 #define GRAPHICS        1
 357 #define NOMODE          -1
 358
 359 extern vmode_t vmodelist[];
 360
 361 /* Font names */
 362 #define FONTVGA         "vga"
 363 #define FONT8x8         "vga8x8"
 364 #define FONT8x14        "vga8x14"
 365 #define FONT8x16        "vga8x16"       /* same as FONTVGA */
 366
 367 /* External functions in 'video.c'. */
 368 void            init_mode(int);
 369 int             find_vmode(int);
 370 u_int8_t        vga_read(u_int32_t);
 371 void            vga_write(u_int32_t, u_int8_t);
 372 void            video_bios_init(void);
 373 void            video_init(void);
 374 int             vmem_pageflt(struct sigframe *);
 375
 376 /* Other external variables, mostly from tty.c. Needs to be cleaned up. */
 377 extern int      vattr;
 378 void            write_vram(void *);