mirror of https://github.com/acidanthera/audk.git
95 lines
4.5 KiB
C
95 lines
4.5 KiB
C
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/** @file
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The device path protocol as defined in EFI 1.0.
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The device path represents a programatic path to a device. It's the view
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from a software point of view. It also must persist from boot to boot, so
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it can not contain things like PCI bus numbers that change from boot to boot.
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Copyright (c) 2006, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name: DevicePath.h
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**/
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#ifndef __EFI_DEVICE_PATH_PROTOCOL_H__
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#define __EFI_DEVICE_PATH_PROTOCOL_H__
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//
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// Device Path protocol
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//
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#define EFI_DEVICE_PATH_PROTOCOL_GUID \
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{ \
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0x9576e91, 0x6d3f, 0x11d2, {0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b } \
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}
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#pragma pack(1)
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typedef struct {
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UINT8 Type;
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UINT8 SubType;
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UINT8 Length[2];
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} EFI_DEVICE_PATH_PROTOCOL;
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#pragma pack()
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#define EFI_DP_TYPE_MASK 0x7F
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#define EFI_DP_TYPE_UNPACKED 0x80
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#define END_DEVICE_PATH_TYPE 0x7f
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#define EFI_END_ENTIRE_DEVICE_PATH 0xff
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#define EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE 0xff
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#define EFI_END_INSTANCE_DEVICE_PATH 0x01
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#define END_ENTIRE_DEVICE_PATH_SUBTYPE EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE
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#define END_INSTANCE_DEVICE_PATH_SUBTYPE EFI_END_INSTANCE_DEVICE_PATH
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#define EFI_END_DEVICE_PATH_LENGTH (sizeof (EFI_DEVICE_PATH_PROTOCOL))
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#define END_DEVICE_PATH_LENGTH EFI_END_DEVICE_PATH_LENGTH
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#define DP_IS_END_TYPE(a)
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#define DP_IS_END_SUBTYPE(a) (((a)->SubType == END_ENTIRE_DEVICE_PATH_SUBTYPE)
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#define DevicePathSubType(a) ((a)->SubType)
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#define IsDevicePathUnpacked(a) ((a)->Type & EFI_DP_TYPE_UNPACKED)
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#define EfiDevicePathNodeLength(a) (((a)->Length[0]) | ((a)->Length[1] << 8))
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#define DevicePathNodeLength(a) (EfiDevicePathNodeLength(a))
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#define EfiNextDevicePathNode(a) ((EFI_DEVICE_PATH_PROTOCOL *) (((UINT8 *) (a)) + EfiDevicePathNodeLength (a)))
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#define NextDevicePathNode(a) (EfiNextDevicePathNode(a))
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#define EfiDevicePathType(a) (((a)->Type) & EFI_DP_TYPE_MASK)
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#define DevicePathType(a) (EfiDevicePathType(a))
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#define EfiIsDevicePathEndType(a) (EfiDevicePathType (a) == END_DEVICE_PATH_TYPE)
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#define IsDevicePathEndType(a) (EfiIsDevicePathEndType(a))
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#define EfiIsDevicePathEndSubType(a) ((a)->SubType == EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE)
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#define IsDevicePathEndSubType(a) (EfiIsDevicePathEndSubType(a))
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#define EfiIsDevicePathEndInstanceSubType(a) ((a)->SubType == EFI_END_INSTANCE_DEVICE_PATH)
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#define EfiIsDevicePathEnd(a) (EfiIsDevicePathEndType (a) && EfiIsDevicePathEndSubType (a))
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#define IsDevicePathEnd(a) (EfiIsDevicePathEnd(a))
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#define EfiIsDevicePathEndInstance(a) (EfiIsDevicePathEndType (a) && EfiIsDevicePathEndInstanceSubType (a))
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#define SetDevicePathNodeLength(a,l) { \
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(a)->Length[0] = (UINT8) (l); \
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(a)->Length[1] = (UINT8) ((l) >> 8); \
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}
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#define SetDevicePathEndNode(a) { \
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(a)->Type = END_DEVICE_PATH_TYPE; \
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(a)->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE; \
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(a)->Length[0] = sizeof(EFI_DEVICE_PATH_PROTOCOL); \
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(a)->Length[1] = 0; \
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}
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extern EFI_GUID gEfiDevicePathProtocolGuid;
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#endif
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