/** @file | |
The device path protocol as defined in EFI 1.0. | |
The device path represents a programatic path to a device. It's the view | |
from a software point of view. It also must persist from boot to boot, so | |
it can not contain things like PCI bus numbers that change from boot to boot. | |
Copyright (c) 2006, 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: DevicePath.h | |
**/ | |
#ifndef __EFI_DEVICE_PATH_PROTOCOL_H__ | |
#define __EFI_DEVICE_PATH_PROTOCOL_H__ | |
// | |
// Device Path protocol | |
// | |
#define EFI_DEVICE_PATH_PROTOCOL_GUID \ | |
{ \ | |
0x9576e91, 0x6d3f, 0x11d2, {0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b } \ | |
} | |
#pragma pack(1) | |
typedef struct { | |
UINT8 Type; | |
UINT8 SubType; | |
UINT8 Length[2]; | |
} EFI_DEVICE_PATH_PROTOCOL; | |
#pragma pack() | |
#define EFI_DP_TYPE_MASK 0x7F | |
#define EFI_DP_TYPE_UNPACKED 0x80 | |
#define END_DEVICE_PATH_TYPE 0x7f | |
#define EFI_END_ENTIRE_DEVICE_PATH 0xff | |
#define EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE 0xff | |
#define EFI_END_INSTANCE_DEVICE_PATH 0x01 | |
#define END_ENTIRE_DEVICE_PATH_SUBTYPE EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE | |
#define END_INSTANCE_DEVICE_PATH_SUBTYPE EFI_END_INSTANCE_DEVICE_PATH | |
#define EFI_END_DEVICE_PATH_LENGTH (sizeof (EFI_DEVICE_PATH_PROTOCOL)) | |
#define END_DEVICE_PATH_LENGTH EFI_END_DEVICE_PATH_LENGTH | |
#define DP_IS_END_TYPE(a) | |
#define DP_IS_END_SUBTYPE(a) (((a)->SubType == END_ENTIRE_DEVICE_PATH_SUBTYPE) | |
#define DevicePathSubType(a) ((a)->SubType) | |
#define IsDevicePathUnpacked(a) ((a)->Type & EFI_DP_TYPE_UNPACKED) | |
#define EfiDevicePathNodeLength(a) (((a)->Length[0]) | ((a)->Length[1] << 8)) | |
#define DevicePathNodeLength(a) (EfiDevicePathNodeLength(a)) | |
#define EfiNextDevicePathNode(a) ((EFI_DEVICE_PATH_PROTOCOL *) (((UINT8 *) (a)) + EfiDevicePathNodeLength (a))) | |
#define NextDevicePathNode(a) (EfiNextDevicePathNode(a)) | |
#define EfiDevicePathType(a) (((a)->Type) & EFI_DP_TYPE_MASK) | |
#define DevicePathType(a) (EfiDevicePathType(a)) | |
#define EfiIsDevicePathEndType(a) (EfiDevicePathType (a) == END_DEVICE_PATH_TYPE) | |
#define IsDevicePathEndType(a) (EfiIsDevicePathEndType(a)) | |
#define EfiIsDevicePathEndSubType(a) ((a)->SubType == EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE) | |
#define IsDevicePathEndSubType(a) (EfiIsDevicePathEndSubType(a)) | |
#define EfiIsDevicePathEndInstanceSubType(a) ((a)->SubType == EFI_END_INSTANCE_DEVICE_PATH) | |
#define EfiIsDevicePathEnd(a) (EfiIsDevicePathEndType (a) && EfiIsDevicePathEndSubType (a)) | |
#define IsDevicePathEnd(a) (EfiIsDevicePathEnd(a)) | |
#define EfiIsDevicePathEndInstance(a) (EfiIsDevicePathEndType (a) && EfiIsDevicePathEndInstanceSubType (a)) | |
#define SetDevicePathNodeLength(a,l) { \ | |
(a)->Length[0] = (UINT8) (l); \ | |
(a)->Length[1] = (UINT8) ((l) >> 8); \ | |
} | |
#define SetDevicePathEndNode(a) { \ | |
(a)->Type = END_DEVICE_PATH_TYPE; \ | |
(a)->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE; \ | |
(a)->Length[0] = sizeof(EFI_DEVICE_PATH_PROTOCOL); \ | |
(a)->Length[1] = 0; \ | |
} | |
extern EFI_GUID gEfiDevicePathProtocolGuid; | |
#endif |