67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
/*==========================================================================;
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*
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* Copyright (C) 1994-1998 Microsoft Corporation. All Rights Reserved.
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*
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* File: ddagp.h
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* Content: AGP memory header file
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* History:
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* Date By Reason
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* ==== == ======
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* 03-Feb-98 DrewB Split from ddrawpr.h for user/kernel portability.
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*
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***************************************************************************/
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#ifndef __DDAGP_INCLUDED__
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#define __DDAGP_INCLUDED__
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// This value controls how big a chunk of GART memory to commit each time
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// we need to (rather than commiting just what we need to satisfy a surface
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// request). This value is in bytes. Currently 256KB.
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#define DEFAULT_AGP_COMMIT_DELTA (256 * 1024)
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extern DWORD dwAGPPolicyMaxBytes;
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extern DWORD dwAGPPolicyCommitDelta;
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//
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// OS-specific functions for AGP manipulation.
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//
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#ifdef WIN95
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#define OsGetAGPDeviceHandle(pHeap) GetDXVxdHandle()
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#define OsCloseAGPDeviceHandle(h) CloseHandle(h)
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#else
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#define OsGetAGPDeviceHandle(pHeap) ((pHeap)->hdevAGP)
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#define OsCloseAGPDeviceHandle(h)
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#endif
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BOOL OsAGPReserve( HANDLE hdev, DWORD dwNumPages, BOOL fIsUC, BOOL fIsWC,
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FLATPTR *pfpLinStart, LARGE_INTEGER *pliDevStart,
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LPVOID *ppvReservation );
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BOOL OsAGPCommit( HANDLE hdev, LPVOID pvReservation,
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DWORD dwPageOffset, DWORD dwNumPages );
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BOOL OsAGPDecommitAll( HANDLE hdev, LPVOID pvReservation, DWORD dwNumPages );
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BOOL OsAGPFree( HANDLE hdev, LPVOID pvReservation );
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//
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// Generic functions that use the OS-specific functions.
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//
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DWORD AGPReserve( HANDLE hdev, DWORD dwSize, BOOL fIsUC, BOOL fIsWC,
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FLATPTR *pfpLinStart, LARGE_INTEGER *pliDevStart,
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LPVOID *ppvReservation );
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BOOL AGPCommit( HANDLE hdev, LPVOID pvReservation,
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DWORD dwOffset, DWORD dwSize );
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BOOL AGPDecommitAll( HANDLE hdev, LPVOID pvReservation, DWORD dwSize );
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BOOL AGPFree( HANDLE hdev, LPVOID pvReservation );
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#ifndef __NTDDKCOMP__
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#ifdef WIN95
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BOOL vxdIsVMMAGPAware ( HANDLE hvxd );
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#endif
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BOOL OSIsAGPAware( HANDLE hdev );
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#endif
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#endif // __DDAGP_INCLUDED__
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