145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
/*
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* Copyright © 1999 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _VGA_H_
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#define _VGA_H_
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typedef unsigned long VGA32;
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typedef unsigned short VGA16;
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typedef unsigned char VGA8;
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typedef int VGABOOL;
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typedef volatile VGA8 VGAVOL8;
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#define VGATRUE 1
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#define VGAFALSE 0
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typedef struct _vgaReg {
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VGA16 id;
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VGA8 base;
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VGA8 len;
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} VgaReg;
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#define VGA_REG_NONE 0xffff
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#define VGA_REG_END VGA_REG_NONE, 0, 0
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typedef struct _vgaValue {
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VGA8 save;
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VGA8 cur;
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VGA16 flags;
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} VgaValue;
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#define VGA_VALUE_VALID 1 /* value ever fetched */
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#define VGA_VALUE_MODIFIED 2 /* value ever changed */
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#define VGA_VALUE_DIRTY 4 /* value needs syncing */
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#define VGA_VALUE_SAVED 8 /* value preserved */
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typedef enum _vgaAccess {
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VgaAccessMem, VgaAccessIo, VgaAccessIndMem, VgaAccessIndIo,
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VgaAccessDone
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} VgaAccess;
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typedef struct _vgaMap {
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VgaAccess access;
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VGA32 port;
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VGA8 addr; /* for Ind access; addr offset from port */
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VGA8 value; /* for Ind access; value offset from port */
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VGA8 index; /* for Ind access; index value */
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} VgaMap;
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#define VGA_UNLOCK_FIXED 1 /* dont save current value */
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#define VGA_UNLOCK_LOCK 2 /* execute only on relock */
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#define VGA_UNLOCK_UNLOCK 4 /* execute only on unlock */
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typedef struct _vgaSave {
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VGA16 first;
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VGA16 last;
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} VgaSave;
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#define VGA_SAVE_END VGA_REG_NONE, VGA_REG_NONE
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typedef struct _vgaCard {
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void (*map) (struct _vgaCard *card, VGA16 reg, VgaMap *map, VGABOOL write);
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void *closure;
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int max;
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VgaValue *values;
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VgaSave *saves;
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} VgaCard;
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VGA8
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VgaInb (VGA16 r);
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void
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VgaOutb (VGA8 v, VGA16 r);
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VGA8
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VgaReadMemb (VGA32 addr);
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void
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VgaWriteMemb (VGA8 v, VGA32 addr);
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void
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VgaSetImm (VgaCard *card, VgaReg *reg, VGA32 value);
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VGA32
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VgaGetImm (VgaCard *card, VgaReg *reg);
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void
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VgaSet (VgaCard *card, VgaReg *reg, VGA32 value);
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VGA32
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VgaGet (VgaCard *card, VgaReg *reg);
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void
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VgaFlush (VgaCard *card);
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void
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VgaFill (VgaCard *card, VGA16 low, VGA16 high);
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void
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VgaPreserve (VgaCard *card);
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void
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VgaInvalidate (VgaCard *card);
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void
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VgaRestore (VgaCard *card);
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void
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VgaFinish (VgaCard *card);
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void
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VgaFlushReg (VgaCard *card, VgaReg *reg);
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VGA8
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VgaFetch (VgaCard *card, VGA16 id);
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void
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VgaStore (VgaCard *card, VGA16 id, VGA8 value);
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VGA8
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_VgaFetchInd (VGA16 port, VGA8 reg);
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void
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_VgaStoreInd (VGA16 port, VGA8 reg, VGA8 value);
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#endif /* _VGA_H_ */
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