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5879b875 | 1 | /** @file\r |
2 | This file declares Read-only Variable Service PPI\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2007, Intel Corporation \r | |
5 | All rights reserved. This program and the accompanying materials \r | |
6 | are licensed and made available under the terms and conditions of the BSD License \r | |
7 | which accompanies this distribution. The full text of the license may be found at \r | |
8 | http://opensource.org/licenses/bsd-license.php \r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
12 | \r | |
5879b875 | 13 | @par Revision Reference:\r |
14 | This PPI is defined in PI\r | |
15 | Version 1.00.\r | |
16 | \r | |
17 | **/\r | |
18 | \r | |
19 | #ifndef __PEI_READ_ONLY_VARIABLE2_PPI_H__\r | |
20 | #define __PEI_READ_ONLY_VARIABLE2_PPI_H__\r | |
21 | \r | |
22 | #define EFI_PEI_READ_ONLY_VARIABLE2_PPI_GUID \\r | |
00edb218 | 23 | { 0x2ab86ef5, 0xecb5, 0x4134, { 0xb5, 0x56, 0x38, 0x54, 0xca, 0x1f, 0xe1, 0xb4 } }\r |
5879b875 | 24 | \r |
25 | \r | |
26 | typedef struct _EFI_PEI_READ_ONLY_VARIABLE2_PPI EFI_PEI_READ_ONLY_VARIABLE2_PPI;\r | |
27 | \r | |
28 | /**\r | |
29 | Read the specified variable from the UEFI variable store. If the Data \r | |
00edb218 A |
30 | buffer is too small to hold the contents of the variable, \r |
31 | the error EFI_BUFFER_TOO_SMALL is returned and DataSize is set to the\r | |
32 | required buffer size to obtain the data.\r | |
5879b875 | 33 | \r |
00edb218 | 34 | @param This A pointer to this instance of the EFI_PEI_READ_ONLY_VARIABLE2_PPI.\r |
5879b875 | 35 | \r |
ac644614 | 36 | @param VariableName A pointer to a null-terminated string that is the variable's name.\r |
5879b875 | 37 | \r |
ac644614 | 38 | @param VendorGuid A pointer to an EFI_GUID that is the variable's GUID. The combination of\r |
00edb218 | 39 | VariableGuid and VariableName must be unique.\r |
5879b875 | 40 | \r |
ac644614 | 41 | @param Attributes If non-NULL, on return, points to the variable's attributes. See "Related Definitons"\r |
00edb218 | 42 | below for possible attribute values.\r |
5879b875 | 43 | \r |
00edb218 A |
44 | @param DataSize On entry, points to the size in bytes of the Data buffer. On return, points to the size of\r |
45 | the data returned in Data.\r | |
5879b875 | 46 | \r |
00edb218 | 47 | @param Data Points to the buffer which will hold the returned variable value.\r |
5879b875 | 48 | \r |
49 | \r | |
50 | @retval EFI_SUCCESS The function completed successfully.\r | |
51 | \r | |
52 | @retval EFI_NOT_FOUND The variable was not found.\r | |
53 | \r | |
54 | @retval EFI_BUFFER_TOO_SMALL The DataSize is too small for the resulting data. \r | |
00edb218 A |
55 | DataSize is updated with the size required for \r |
56 | the specified variable.\r | |
5879b875 | 57 | \r |
58 | @retval EFI_INVALID_PARAMETER VariableName, VariableGuid, DataSize or Data is NULL.\r | |
59 | \r | |
60 | @retval EFI_DEVICE_ERROR The variable could not be retrieved because of a device error.\r | |
61 | \r | |
62 | **/\r | |
63 | typedef\r | |
64 | EFI_STATUS\r | |
65 | (EFIAPI *EFI_PEI_GET_VARIABLE2)(\r | |
00edb218 A |
66 | IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,\r |
67 | IN CONST CHAR16 *VariableName,\r | |
68 | IN CONST EFI_GUID *VariableGuid,\r | |
69 | OUT UINT32 *Attributes,\r | |
70 | IN OUT UINTN *DataSize,\r | |
71 | OUT VOID *Data\r | |
ba237732 | 72 | );\r |
5879b875 | 73 | \r |
74 | \r | |
75 | /**\r | |
76 | This function is called multiple times to retrieve the VariableName \r | |
00edb218 A |
77 | and VariableGuid of all variables currently available in the system. \r |
78 | On each call, the previous results are passed into the interface, \r | |
79 | and, on return, the interface returns the data for the next \r | |
80 | interface. When the entire variable list has been returned, \r | |
81 | EFI_NOT_FOUND is returned.\r | |
5879b875 | 82 | \r |
00edb218 | 83 | @param This A pointer to this instance of the EFI_PEI_READ_ONLY_VARIABLE2_PPI.\r |
5879b875 | 84 | \r |
00edb218 | 85 | @param VariableNameSize On entry, points to the size of the buffer pointed to by VariableName.\r |
5879b875 | 86 | \r |
ac644614 | 87 | @param VariableName On entry, a pointer to a null-terminated string that is the variable's name.\r |
88 | On return, points to the next variable's null-terminated name string.\r | |
5879b875 | 89 | \r |
ac644614 | 90 | @param VendorGuid On entry, a pointer to an UEFI _GUID that is the variable's GUID. \r |
91 | On return, a pointer to the next variable's GUID.\r | |
5879b875 | 92 | \r |
93 | \r | |
94 | @retval EFI_SUCCESS The variable was read successfully.\r | |
95 | \r | |
96 | @retval EFI_NOT_FOUND The variable could not be found.\r | |
97 | \r | |
98 | @retval EFI_BUFFER_TOO_SMALL The VariableNameSize is too small for the resulting\r | |
00edb218 A |
99 | data. VariableNameSize is updated with the size\r |
100 | required for the specified variable.\r | |
5879b875 | 101 | \r |
102 | @retval EFI_INVALID_PARAMETER VariableName, VariableGuid or\r | |
00edb218 | 103 | VariableNameSize is NULL.\r |
5879b875 | 104 | \r |
105 | @retval EFI_DEVICE_ERROR The variable could not be retrieved because of a device error.\r | |
106 | \r | |
107 | **/\r | |
108 | typedef\r | |
109 | EFI_STATUS\r | |
8b13229b | 110 | (EFIAPI *EFI_PEI_NEXT_VARIABLE_NAME2)(\r |
00edb218 A |
111 | IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,\r |
112 | IN OUT UINTN *VariableNameSize,\r | |
113 | IN OUT CHAR16 *VariableName,\r | |
114 | IN OUT EFI_GUID *VariableGuid\r | |
ba237732 | 115 | );\r |
5879b875 | 116 | \r |
117 | /**\r | |
118 | This PPI provides a lightweight, read-only variant of the full EFI \r | |
119 | variable services. \r | |
120 | \r | |
121 | @param GetVariable\r | |
122 | A service to ascertain a given variable name.\r | |
123 | \r | |
124 | @param GetNextVariableName\r | |
125 | A service to ascertain a variable based upon a given, known variable\r | |
126 | \r | |
127 | **/\r | |
128 | struct _EFI_PEI_READ_ONLY_VARIABLE2_PPI {\r | |
00edb218 A |
129 | EFI_PEI_GET_VARIABLE2 GetVariable;\r |
130 | EFI_PEI_NEXT_VARIABLE_NAME2 NextVariableName;\r | |
5879b875 | 131 | };\r |
132 | \r | |
133 | extern EFI_GUID gEfiPeiReadOnlyVariable2PpiGuid;\r | |
134 | \r | |
135 | #endif\r |