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878ddf1f | 1 | /** @file\r |
2 | The device path protocol as defined in EFI 1.0.\r | |
3 | \r | |
4 | The device path represents a programatic path to a device. It's the view\r | |
5 | from a software point of view. It also must persist from boot to boot, so \r | |
6 | it can not contain things like PCI bus numbers that change from boot to boot.\r | |
7 | \r | |
8 | Copyright (c) 2006, Intel Corporation \r | |
9 | All rights reserved. This program and the accompanying materials \r | |
10 | are licensed and made available under the terms and conditions of the BSD License \r | |
11 | which accompanies this distribution. The full text of the license may be found at \r | |
12 | http://opensource.org/licenses/bsd-license.php \r | |
13 | \r | |
14 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
15 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
16 | \r | |
17 | Module Name: DevicePath.h\r | |
18 | \r | |
19 | **/\r | |
20 | \r | |
21 | #ifndef __EFI_DEVICE_PATH_PROTOCOL_H__\r | |
22 | #define __EFI_DEVICE_PATH_PROTOCOL_H__\r | |
23 | \r | |
24 | //\r | |
25 | // Device Path protocol\r | |
26 | //\r | |
27 | #define EFI_DEVICE_PATH_PROTOCOL_GUID \\r | |
28 | { \\r | |
29 | 0x9576e91, 0x6d3f, 0x11d2, {0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b } \\r | |
30 | }\r | |
31 | \r | |
32 | #pragma pack(1)\r | |
33 | \r | |
34 | typedef struct {\r | |
35 | UINT8 Type;\r | |
36 | UINT8 SubType;\r | |
37 | UINT8 Length[2];\r | |
38 | } EFI_DEVICE_PATH_PROTOCOL;\r | |
39 | \r | |
40 | #pragma pack()\r | |
41 | \r | |
42 | #define EFI_DP_TYPE_MASK 0x7F\r | |
43 | #define EFI_DP_TYPE_UNPACKED 0x80\r | |
44 | #define END_DEVICE_PATH_TYPE 0x7f\r | |
45 | \r | |
46 | #define EFI_END_ENTIRE_DEVICE_PATH 0xff\r | |
47 | #define EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE 0xff\r | |
48 | #define EFI_END_INSTANCE_DEVICE_PATH 0x01\r | |
49 | #define END_ENTIRE_DEVICE_PATH_SUBTYPE EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE\r | |
50 | #define END_INSTANCE_DEVICE_PATH_SUBTYPE EFI_END_INSTANCE_DEVICE_PATH\r | |
51 | \r | |
52 | #define EFI_END_DEVICE_PATH_LENGTH (sizeof (EFI_DEVICE_PATH_PROTOCOL))\r | |
53 | #define END_DEVICE_PATH_LENGTH EFI_END_DEVICE_PATH_LENGTH\r | |
54 | \r | |
55 | #define DP_IS_END_TYPE(a) \r | |
56 | #define DP_IS_END_SUBTYPE(a) (((a)->SubType == END_ENTIRE_DEVICE_PATH_SUBTYPE)\r | |
57 | #define DevicePathSubType(a) ((a)->SubType)\r | |
58 | #define IsDevicePathUnpacked(a) ((a)->Type & EFI_DP_TYPE_UNPACKED)\r | |
59 | \r | |
60 | #define EfiDevicePathNodeLength(a) (((a)->Length[0]) | ((a)->Length[1] << 8))\r | |
61 | #define DevicePathNodeLength(a) (EfiDevicePathNodeLength(a))\r | |
62 | #define EfiNextDevicePathNode(a) ((EFI_DEVICE_PATH_PROTOCOL *) (((UINT8 *) (a)) + EfiDevicePathNodeLength (a)))\r | |
63 | #define NextDevicePathNode(a) (EfiNextDevicePathNode(a)) \r | |
64 | \r | |
65 | #define EfiDevicePathType(a) (((a)->Type) & EFI_DP_TYPE_MASK)\r | |
66 | #define DevicePathType(a) (EfiDevicePathType(a))\r | |
67 | #define EfiIsDevicePathEndType(a) (EfiDevicePathType (a) == END_DEVICE_PATH_TYPE)\r | |
68 | #define IsDevicePathEndType(a) (EfiIsDevicePathEndType(a)) \r | |
69 | \r | |
70 | \r | |
71 | #define EfiIsDevicePathEndSubType(a) ((a)->SubType == EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE)\r | |
72 | #define IsDevicePathEndSubType(a) (EfiIsDevicePathEndSubType(a))\r | |
73 | #define EfiIsDevicePathEndInstanceSubType(a) ((a)->SubType == EFI_END_INSTANCE_DEVICE_PATH)\r | |
74 | \r | |
75 | #define EfiIsDevicePathEnd(a) (EfiIsDevicePathEndType (a) && EfiIsDevicePathEndSubType (a))\r | |
76 | #define IsDevicePathEnd(a) (EfiIsDevicePathEnd(a))\r | |
77 | #define EfiIsDevicePathEndInstance(a) (EfiIsDevicePathEndType (a) && EfiIsDevicePathEndInstanceSubType (a))\r | |
78 | \r | |
79 | \r | |
80 | #define SetDevicePathNodeLength(a,l) { \\r | |
81 | (a)->Length[0] = (UINT8) (l); \\r | |
82 | (a)->Length[1] = (UINT8) ((l) >> 8); \\r | |
83 | }\r | |
84 | \r | |
85 | #define SetDevicePathEndNode(a) { \\r | |
86 | (a)->Type = END_DEVICE_PATH_TYPE; \\r | |
87 | (a)->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE; \\r | |
88 | (a)->Length[0] = sizeof(EFI_DEVICE_PATH_PROTOCOL); \\r | |
89 | (a)->Length[1] = 0; \\r | |
90 | }\r | |
91 | \r | |
92 | extern EFI_GUID gEfiDevicePathProtocolGuid;\r | |
93 | \r | |
94 | #endif\r |