xorg-server-1.4/hw/kdrive/src/vga.h

   1 /*
   2  * Copyright © 1999 Keith Packard
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that
   7  * copyright notice and this permission notice appear in supporting
   8  * documentation, and that the name of Keith Packard not be used in
   9  * advertising or publicity pertaining to distribution of the software without
  10  * specific, written prior permission.  Keith Packard makes no
  11  * representations about the suitability of this software for any purpose.  It
  12  * is provided "as is" without express or implied warranty.
  13  *
  14  * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  20  * PERFORMANCE OF THIS SOFTWARE.
  21  */
  22
  23 #ifndef _VGA_H_
  24 #define _VGA_H_
  25
  26 typedef unsigned long   VGA32;
  27 typedef unsigned short  VGA16;
  28 typedef unsigned char   VGA8;
  29 typedef int             VGABOOL;
  30 typedef volatile VGA8   VGAVOL8;
  31
  32 #define VGATRUE     1
  33 #define VGAFALSE    0
  34
  35 typedef struct _vgaReg {
  36     VGA16       id;
  37     VGA8        base;
  38     VGA8        len;
  39 } VgaReg;
  40
  41 #define VGA_REG_NONE        0xffff
  42 #define VGA_REG_END         VGA_REG_NONE, 0, 0
  43
  44 typedef struct _vgaValue {
  45     VGA8        save;
  46     VGA8        cur;
  47     VGA16       flags;
  48 } VgaValue;
  49
  50 #define VGA_VALUE_VALID     1   /* value ever fetched */
  51 #define VGA_VALUE_MODIFIED  2   /* value ever changed */
  52 #define VGA_VALUE_DIRTY     4   /* value needs syncing */
  53 #define VGA_VALUE_SAVED     8   /* value preserved */
  54
  55 typedef enum _vgaAccess {
  56     VgaAccessMem, VgaAccessIo, VgaAccessIndMem, VgaAccessIndIo,
  57     VgaAccessDone
  58 } VgaAccess;
  59
  60 typedef struct _vgaMap {
  61     VgaAccess   access;
  62     VGA32       port;
  63     VGA8        addr;       /* for Ind access; addr offset from port */
  64     VGA8        value;      /* for Ind access; value offset from port */
  65     VGA8        index;      /* for Ind access; index value */
  66 } VgaMap;
  67
  68 #define VGA_UNLOCK_FIXED    1   /* dont save current value */
  69 #define VGA_UNLOCK_LOCK     2   /* execute only on relock */
  70 #define VGA_UNLOCK_UNLOCK   4   /* execute only on unlock */
  71
  72 typedef struct _vgaSave {
  73     VGA16       first;
  74     VGA16       last;
  75 } VgaSave;
  76
  77 #define VGA_SAVE_END    VGA_REG_NONE, VGA_REG_NONE
  78
  79 typedef struct _vgaCard {
  80     void        (*map) (struct _vgaCard *card, VGA16 reg, VgaMap *map, VGABOOL write);
  81     void        *closure;
  82     int         max;
  83     VgaValue    *values;
  84     VgaSave     *saves;
  85 } VgaCard;
  86
  87 VGA8
  88 VgaInb (VGA16 r);
  89
  90 void
  91 VgaOutb (VGA8 v, VGA16 r);
  92
  93 VGA8
  94 VgaReadMemb (VGA32 addr);
  95
  96 void
  97 VgaWriteMemb (VGA8 v, VGA32 addr);
  98
  99 void
 100 VgaSetImm (VgaCard *card, VgaReg *reg, VGA32 value);
 101
 102 VGA32
 103 VgaGetImm (VgaCard *card, VgaReg *reg);
 104
 105 void
 106 VgaSet (VgaCard *card, VgaReg *reg, VGA32 value);
 107
 108 VGA32
 109 VgaGet (VgaCard *card, VgaReg *reg);
 110
 111 void
 112 VgaFlush (VgaCard *card);
 113
 114 void
 115 VgaFill (VgaCard *card, VGA16 low, VGA16 high);
 116
 117 void
 118 VgaPreserve (VgaCard *card);
 119
 120 void
 121 VgaInvalidate (VgaCard *card);
 122
 123 void
 124 VgaRestore (VgaCard *card);
 125
 126 void
 127 VgaFinish (VgaCard *card);
 128
 129 void
 130 VgaFlushReg (VgaCard *card, VgaReg *reg);
 131
 132 VGA8
 133 VgaFetch (VgaCard *card, VGA16 id);
 134
 135 void
 136 VgaStore (VgaCard *card, VGA16 id, VGA8 value);
 137
 138 VGA8
 139 _VgaFetchInd (VGA16 port, VGA8 reg);
 140
 141 void
 142 _VgaStoreInd (VGA16 port, VGA8 reg, VGA8 value);
 143
 144 #endif /* _VGA_H_ */