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Protocols — Device I/O Protocol
Version 1.10 12/01/02 18-3
Unmap Releases any resources a llocated by Map().SeetheUnmap() function
description.
AllocateBuffer Allocates pages that are suitable for a common buffer mapping. See the
AllocateBuffer()
function description.
Flush Flushes any posted write data to the device. See the Flush()
function
description.
FreeBuffer Free pages that were allocated with AllocateBuffer().Seethe
FreeBuffer()
function description.
Related Definitions
//*******************************************************
// EFI_IO_WIDTH
//*******************************************************
typedef enum {
IO_UINT8 = 0,
IO_UINT16 = 1,
IO_UINT32 = 2,
IO_UINT64 = 3
} EFI_IO_WIDTH;
//*******************************************************
// EFI_DEVICE_IO
//*******************************************************
typedef
EFI_STATUS
(EFIAPI *EFI_DEVICE_IO) (
IN struct _EFI_DEVICE_IO_INTERFACE *This,
IN EFI_IO_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN OUT VOID *Buffer
);
//*******************************************************
// EFI_IO_ACCESS
//*******************************************************
typedef struct {
EFI_DEVICE_IO Read;
EFI_DEVICE_IO Write;
} EFI_IO_ACCESS;