1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/** @file
Module produce EFI_PEI_READ_ONLY_VARIABLE2_PPI on top of EFI_PEI_READ_ONLY_VARIABLE_PPI.
UEFI PI Spec supersedes Intel's Framework Specs.
EFI_PEI_READ_ONLY_VARIABLE_PPI defined in Intel Framework Pkg is replaced by EFI_PEI_READ_ONLY_VARIABLE2_PPI
in MdePkg.
This module produces EFI_PEI_READ_ONLY_VARIABLE2_PPI on top of EFI_PEI_READ_ONLY_VARIABLE_PPI.
This module is used on platform when both of these two conditions are true:
1) Framework module produces EFI_PEI_READ_ONLY_VARIABLE_PPI is present.
2) The platform has PI modules that only consumes EFI_PEI_READ_ONLY_VARIABLE2_PPI.
This module can't be used together with ReadOnlyVariableToReadOnlyVariable2Thunk module.
Copyright (c) 2006 - 2008 Intel Corporation. <BR>
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:
**/
#include <PiPei.h>
#include <Ppi/ReadOnlyVariable2.h>
#include <Ppi/ReadOnlyVariable.h>
#include <Ppi/ReadOnlyVariableThunkPresent.h>
#include <Library/DebugLib.h>
#include <Library/PeiServicesTablePointerLib.h>
#include <Library/PeiServicesLib.h>
//
// Function Prototypes
//
EFI_STATUS
EFIAPI
PeiGetVariable (
IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
IN CONST CHAR16 *VariableName,
IN CONST EFI_GUID *VariableGuid,
OUT UINT32 *Attributes,
IN OUT UINTN *DataSize,
OUT VOID *Data
);
EFI_STATUS
EFIAPI
PeiGetNextVariableName (
IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
IN OUT UINTN *VariableNameSize,
IN OUT CHAR16 *VariableName,
IN OUT EFI_GUID *VariableGuid
);
//
// Module globals
//
EFI_PEI_READ_ONLY_VARIABLE2_PPI mVariablePpi = {
PeiGetVariable,
PeiGetNextVariableName
};
EFI_PEI_PPI_DESCRIPTOR mPpiListVariable = {
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiPeiReadOnlyVariable2PpiGuid,
&mVariablePpi
};
EFI_PEI_PPI_DESCRIPTOR mReadOnlyVariableThunkPresent = {
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gPeiReadonlyVariableThunkPresentPpiGuid,
NULL
};
EFI_STATUS
EFIAPI
PeimInitializeReadOnlyVariable2 (
IN EFI_FFS_FILE_HEADER *FfsHeader,
IN EFI_PEI_SERVICES **PeiServices
)
/*++
Routine Description:
Provide the functionality of the variable services.
Arguments:
FfsHeadher - The FFS file header
PeiServices - General purpose services available to every PEIM.
Returns:
Status - EFI_SUCCESS if the interface could be successfully
installed
--*/
{
VOID *Interface;
EFI_STATUS Status;
//
// Make sure ReadOnlyVariable2ToReadOnlyVariable module is not present. If so, the call chain will form a
// infinite loop: ReadOnlyVariable2 -> ReadOnlyVariable -> ReadOnlyVariable2 -> ....
//
Status = PeiServicesLocatePpi (&gPeiReadonlyVariableThunkPresentPpiGuid, 0, NULL, &Interface);
ASSERT (Status == EFI_NOT_FOUND);
Status = PeiServicesInstallPpi (&mReadOnlyVariableThunkPresent);
ASSERT_EFI_ERROR (Status);
//
// Publish the variable capability to other modules
//
return PeiServicesInstallPpi (&mPpiListVariable);
}
/**
Provide the read variable functionality of the variable services.
@param PeiServices General purpose services available to every PEIM.
@param VariableName The variable name
@param VendorGuid The vendor's GUID
@param Attributes Pointer to the attribute
@param DataSize Size of data
@param Data Pointer to data
@retval EFI_SUCCESS The interface could be successfully installed
@retval EFI_NOT_FOUND The variable could not be discovered
@retval EFI_BUFFER_TOO_SMALL The caller buffer is not large enough
**/
EFI_STATUS
EFIAPI
PeiGetVariable (
IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
IN CONST CHAR16 *VariableName,
IN CONST EFI_GUID *VariableGuid,
OUT UINT32 *Attributes,
IN OUT UINTN *DataSize,
OUT VOID *Data
)
{
EFI_STATUS Status;
EFI_PEI_READ_ONLY_VARIABLE_PPI *ReadOnlyVariable;
Status = PeiServicesLocatePpi (
&gEfiPeiReadOnlyVariablePpiGuid,
0,
NULL,
(VOID **)&ReadOnlyVariable
);
ASSERT_EFI_ERROR (Status);
return ReadOnlyVariable->PeiGetVariable (
GetPeiServicesTablePointer (),
(CHAR16 *)VariableName,
(EFI_GUID *)VariableGuid,
Attributes,
DataSize,
Data
);
}
/**
Provide the get next variable functionality of the variable services.
@param PeiServices General purpose services available to every PEIM.
@param VariabvleNameSize The variable name's size.
@param VariableName A pointer to the variable's name.
@param VariableGuid A pointer to the EFI_GUID structure.
@param VariableNameSize Size of the variable name
@param VariableName The variable name
@param VendorGuid The vendor's GUID
@retval EFI_SUCCESS The interface could be successfully installed
@retval EFI_NOT_FOUND The variable could not be discovered
**/
EFI_STATUS
EFIAPI
PeiGetNextVariableName (
IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
IN OUT UINTN *VariableNameSize,
IN OUT CHAR16 *VariableName,
IN OUT EFI_GUID *VariableGuid
)
{
EFI_STATUS Status;
EFI_PEI_READ_ONLY_VARIABLE_PPI *ReadOnlyVariable;
Status = PeiServicesLocatePpi (
&gEfiPeiReadOnlyVariablePpiGuid,
0,
NULL,
(VOID **)&ReadOnlyVariable
);
ASSERT_EFI_ERROR (Status);
return ReadOnlyVariable->PeiGetNextVariableName (
GetPeiServicesTablePointer (),
VariableNameSize,
VariableName,
VariableGuid
);
}
|
