Source code of Windows XP (NT5)
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/*==========================================================================;
* * Copyright (C) 1994-1998 Microsoft Corporation. All Rights Reserved. * * File: ddagp.h * Content: AGP memory header file * History: * Date By Reason * ==== == ====== * 03-Feb-98 DrewB Split from ddrawpr.h for user/kernel portability. * ***************************************************************************/
#ifndef __DDAGP_INCLUDED__
#define __DDAGP_INCLUDED__
// This value controls how big a chunk of GART memory to commit each time
// we need to (rather than commiting just what we need to satisfy a surface
// request). This value is in bytes. Currently 256KB.
#define DEFAULT_AGP_COMMIT_DELTA (256 * 1024)
extern DWORD dwAGPPolicyMaxBytes;extern DWORD dwAGPPolicyCommitDelta;
//
// OS-specific functions for AGP manipulation.
//
#ifdef WIN95
#define OsGetAGPDeviceHandle(pHeap) GetDXVxdHandle()
#define OsCloseAGPDeviceHandle(h) CloseHandle(h)
#else
#define OsGetAGPDeviceHandle(pHeap) ((pHeap)->hdevAGP)
#define OsCloseAGPDeviceHandle(h)
#endif
BOOL OsAGPReserve( HANDLE hdev, DWORD dwNumPages, BOOL fIsUC, BOOL fIsWC, FLATPTR *pfpLinStart, LARGE_INTEGER *pliDevStart, LPVOID *ppvReservation );BOOL OsAGPCommit( HANDLE hdev, LPVOID pvReservation, DWORD dwPageOffset, DWORD dwNumPages );BOOL OsAGPDecommitAll( HANDLE hdev, LPVOID pvReservation, DWORD dwNumPages );BOOL OsAGPFree( HANDLE hdev, LPVOID pvReservation );
//
// Generic functions that use the OS-specific functions.
//
DWORD AGPReserve( HANDLE hdev, DWORD dwSize, BOOL fIsUC, BOOL fIsWC, FLATPTR *pfpLinStart, LARGE_INTEGER *pliDevStart, LPVOID *ppvReservation );BOOL AGPCommit( HANDLE hdev, LPVOID pvReservation, DWORD dwOffset, DWORD dwSize );BOOL AGPDecommitAll( HANDLE hdev, LPVOID pvReservation, DWORD dwSize );BOOL AGPFree( HANDLE hdev, LPVOID pvReservation );
#ifndef __NTDDKCOMP__
#ifdef WIN95
BOOL vxdIsVMMAGPAware ( HANDLE hvxd );#endif
BOOL OSIsAGPAware( HANDLE hdev );#endif
#endif // __DDAGP_INCLUDED__
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