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
|
/** @file
*
* Copyright (c) 2011-2015, ARM Limited. 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.
*
**/
#include "BdsInternal.h"
EFI_STATUS
ShutdownUefiBootServices (
VOID
)
{
EFI_STATUS Status;
UINTN MemoryMapSize;
EFI_MEMORY_DESCRIPTOR *MemoryMap;
UINTN MapKey;
UINTN DescriptorSize;
UINT32 DescriptorVersion;
UINTN Pages;
MemoryMap = NULL;
MemoryMapSize = 0;
Pages = 0;
do {
Status = gBS->GetMemoryMap (
&MemoryMapSize,
MemoryMap,
&MapKey,
&DescriptorSize,
&DescriptorVersion
);
if (Status == EFI_BUFFER_TOO_SMALL) {
Pages = EFI_SIZE_TO_PAGES (MemoryMapSize) + 1;
MemoryMap = AllocatePages (Pages);
//
// Get System MemoryMap
//
Status = gBS->GetMemoryMap (
&MemoryMapSize,
MemoryMap,
&MapKey,
&DescriptorSize,
&DescriptorVersion
);
}
// Don't do anything between the GetMemoryMap() and ExitBootServices()
if (!EFI_ERROR(Status)) {
Status = gBS->ExitBootServices (gImageHandle, MapKey);
if (EFI_ERROR(Status)) {
FreePages (MemoryMap, Pages);
MemoryMap = NULL;
MemoryMapSize = 0;
}
}
} while (EFI_ERROR(Status));
return Status;
}
/**
Connect all DXE drivers
@retval EFI_SUCCESS All drivers have been connected
@retval EFI_NOT_FOUND No handles match the search.
@retval EFI_OUT_OF_RESOURCES There is not resource pool memory to store the matching results.
**/
EFI_STATUS
BdsConnectAllDrivers (
VOID
)
{
UINTN HandleCount, Index;
EFI_HANDLE *HandleBuffer;
EFI_STATUS Status;
do {
// Locate all the driver handles
Status = gBS->LocateHandleBuffer (
AllHandles,
NULL,
NULL,
&HandleCount,
&HandleBuffer
);
if (EFI_ERROR (Status)) {
break;
}
// Connect every handles
for (Index = 0; Index < HandleCount; Index++) {
gBS->ConnectController (HandleBuffer[Index], NULL, NULL, TRUE);
}
if (HandleBuffer != NULL) {
FreePool (HandleBuffer);
}
// Check if new handles have been created after the start of the previous handles
Status = gDS->Dispatch ();
} while (!EFI_ERROR(Status));
return EFI_SUCCESS;
}
EFI_STATUS
GetGlobalEnvironmentVariable (
IN CONST CHAR16* VariableName,
IN VOID* DefaultValue,
IN OUT UINTN* Size,
OUT VOID** Value
)
{
return GetEnvironmentVariable (VariableName, &gEfiGlobalVariableGuid,
DefaultValue, Size, Value);
}
EFI_STATUS
GetEnvironmentVariable (
IN CONST CHAR16* VariableName,
IN EFI_GUID* VendorGuid,
IN VOID* DefaultValue,
IN OUT UINTN* Size,
OUT VOID** Value
)
{
EFI_STATUS Status;
UINTN VariableSize;
// Try to get the variable size.
*Value = NULL;
VariableSize = 0;
Status = gRT->GetVariable ((CHAR16 *) VariableName, VendorGuid, NULL, &VariableSize, *Value);
if (Status == EFI_NOT_FOUND) {
if ((DefaultValue != NULL) && (Size != NULL) && (*Size != 0)) {
// If the environment variable does not exist yet then set it with the default value
Status = gRT->SetVariable (
(CHAR16*)VariableName,
VendorGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
*Size,
DefaultValue
);
*Value = AllocateCopyPool (*Size, DefaultValue);
} else {
return EFI_NOT_FOUND;
}
} else if (Status == EFI_BUFFER_TOO_SMALL) {
// Get the environment variable value
*Value = AllocatePool (VariableSize);
if (*Value == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = gRT->GetVariable ((CHAR16 *)VariableName, VendorGuid, NULL, &VariableSize, *Value);
if (EFI_ERROR (Status)) {
FreePool(*Value);
return EFI_INVALID_PARAMETER;
}
if (Size) {
*Size = VariableSize;
}
} else {
*Value = AllocateCopyPool (*Size, DefaultValue);
return Status;
}
return EFI_SUCCESS;
}
|
