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/*++
Copyright (c) 2004, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
DeviceIo.h
Abstract:
Device IO protocol as defined in the EFI 1.0 specification.
Device IO is used to abstract hardware access to devices. It includes
memory mapped IO, IO, PCI Config space, and DMA.
--*/
#ifndef _DEVICE_IO_H_
#define _DEVICE_IO_H_
#define EFI_DEVICE_IO_PROTOCOL_GUID \
{ \
0xaf6ac311, 0x84c3, 0x11d2, 0x8e, 0x3c, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b \
}
EFI_FORWARD_DECLARATION (EFI_DEVICE_IO_PROTOCOL);
typedef enum {
IO_UINT8,
IO_UINT16,
IO_UINT32,
IO_UINT64,
MMIO_COPY_UINT8,
MMIO_COPY_UINT16,
MMIO_COPY_UINT32,
MMIO_COPY_UINT64
} EFI_IO_WIDTH;
typedef
EFI_STATUS
(EFIAPI *EFI_DEVICE_IO) (
IN EFI_DEVICE_IO_PROTOCOL * This,
IN EFI_IO_WIDTH Width,
IN UINT64 Address,
IN UINTN Count,
IN OUT VOID *Buffer
);
typedef struct {
EFI_DEVICE_IO Read;
EFI_DEVICE_IO Write;
} EFI_IO_ACCESS;
typedef
EFI_STATUS
(EFIAPI *EFI_PCI_DEVICE_PATH) (
IN EFI_DEVICE_IO_PROTOCOL * This,
IN UINT64 Address,
IN OUT EFI_DEVICE_PATH_PROTOCOL **PciDevicePath
);
typedef enum {
EfiBusMasterRead,
EfiBusMasterWrite,
EfiBusMasterCommonBuffer
} EFI_IO_OPERATION_TYPE;
typedef
EFI_STATUS
(EFIAPI *EFI_IO_MAP) (
IN EFI_DEVICE_IO_PROTOCOL * This,
IN EFI_IO_OPERATION_TYPE Operation,
IN EFI_PHYSICAL_ADDRESS * HostAddress,
IN OUT UINTN *NumberOfBytes,
OUT EFI_PHYSICAL_ADDRESS * DeviceAddress,
OUT VOID **Mapping
);
typedef
EFI_STATUS
(EFIAPI *EFI_IO_UNMAP) (
IN EFI_DEVICE_IO_PROTOCOL * This,
IN VOID *Mapping
);
typedef
EFI_STATUS
(EFIAPI *EFI_IO_ALLOCATE_BUFFER) (
IN EFI_DEVICE_IO_PROTOCOL * This,
IN EFI_ALLOCATE_TYPE Type,
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN Pages,
IN OUT EFI_PHYSICAL_ADDRESS * HostAddress
);
typedef
EFI_STATUS
(EFIAPI *EFI_IO_FLUSH) (
IN EFI_DEVICE_IO_PROTOCOL * This
);
typedef
EFI_STATUS
(EFIAPI *EFI_IO_FREE_BUFFER) (
IN EFI_DEVICE_IO_PROTOCOL * This,
IN UINTN Pages,
IN EFI_PHYSICAL_ADDRESS HostAddress
);
typedef struct _EFI_DEVICE_IO_PROTOCOL {
EFI_IO_ACCESS Mem;
EFI_IO_ACCESS Io;
EFI_IO_ACCESS Pci;
EFI_IO_MAP Map;
EFI_PCI_DEVICE_PATH PciDevicePath;
EFI_IO_UNMAP Unmap;
EFI_IO_ALLOCATE_BUFFER AllocateBuffer;
EFI_IO_FLUSH Flush;
EFI_IO_FREE_BUFFER FreeBuffer;
} EFI_DEVICE_IO_PROTOCOL;
extern EFI_GUID gEfiDeviceIoProtocolGuid;
#endif
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