DmaLib.h

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#ifndef __DMA_LIB_H__
#define __DMA_LIB_H__
 
typedef enum {
  MapOperationBusMasterRead,
  MapOperationBusMasterWrite,
  MapOperationBusMasterCommonBuffer,
  MapOperationMaximum
} DMA_MAP_OPERATION;
 
EFI_STATUS
EFIAPI
DmaMap (
  IN     DMA_MAP_OPERATION  Operation,
  IN     VOID               *HostAddress,
  IN OUT UINTN              *NumberOfBytes,
  OUT    PHYSICAL_ADDRESS   *DeviceAddress,
  OUT    VOID               **Mapping
  );
 
EFI_STATUS
EFIAPI
DmaUnmap (
  IN  VOID  *Mapping
  );
 
EFI_STATUS
EFIAPI
DmaAllocateBuffer (
  IN  EFI_MEMORY_TYPE  MemoryType,
  IN  UINTN            Pages,
  OUT VOID             **HostAddress
  );
 
EFI_STATUS
EFIAPI
DmaFreeBuffer (
  IN  UINTN  Pages,
  IN  VOID   *HostAddress
  );
 
EFI_STATUS
EFIAPI
DmaAllocateAlignedBuffer (
  IN  EFI_MEMORY_TYPE  MemoryType,
  IN  UINTN            Pages,
  IN  UINTN            Alignment,
  OUT VOID             **HostAddress
  );
 
#endif