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
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
|
/** @file
Sample ACPI Platform Driver
Copyright (c) 2008 - 2011, Intel Corporation. All rights reserved.<BR>
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 <PiDxe.h>
#include <Protocol/AcpiTable.h>
#include <Protocol/FirmwareVolume2.h>
#include <Library/BaseLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <IndustryStandard/Acpi.h>
#include "UpdateAcpiTable.h"
/**
Locate the first instance of a protocol. If the protocol requested is an
FV protocol, then it will return the first FV that contains the ACPI table
storage file.
@param Instance Return pointer to the first instance of the protocol
@return EFI_SUCCESS The function completed successfully.
@return EFI_NOT_FOUND The protocol could not be located.
@return EFI_OUT_OF_RESOURCES There are not enough resources to find the protocol.
**/
EFI_STATUS
LocateFvInstanceWithTables (
OUT EFI_FIRMWARE_VOLUME2_PROTOCOL **Instance
)
{
EFI_STATUS Status;
EFI_HANDLE *HandleBuffer;
UINTN NumberOfHandles;
EFI_FV_FILETYPE FileType;
UINT32 FvStatus;
EFI_FV_FILE_ATTRIBUTES Attributes;
UINTN Size;
UINTN Index;
EFI_FIRMWARE_VOLUME2_PROTOCOL *FvInstance;
FvStatus = 0;
//
// Locate protocol.
//
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiFirmwareVolume2ProtocolGuid,
NULL,
&NumberOfHandles,
&HandleBuffer
);
if (EFI_ERROR (Status)) {
//
// Defined errors at this time are not found and out of resources.
//
return Status;
}
//
// Looking for FV with ACPI storage file
//
for (Index = 0; Index < NumberOfHandles; Index++) {
//
// Get the protocol on this handle
// This should not fail because of LocateHandleBuffer
//
Status = gBS->HandleProtocol (
HandleBuffer[Index],
&gEfiFirmwareVolume2ProtocolGuid,
(VOID**) &FvInstance
);
ASSERT_EFI_ERROR (Status);
//
// See if it has the ACPI storage file
//
Status = FvInstance->ReadFile (
FvInstance,
(EFI_GUID*)PcdGetPtr (PcdAcpiTableStorageFile),
NULL,
&Size,
&FileType,
&Attributes,
&FvStatus
);
//
// If we found it, then we are done
//
if (Status == EFI_SUCCESS) {
*Instance = FvInstance;
break;
}
}
//
// Our exit status is determined by the success of the previous operations
// If the protocol was found, Instance already points to it.
//
//
// Free any allocated buffers
//
gBS->FreePool (HandleBuffer);
return Status;
}
/**
This function calculates and updates an UINT8 checksum.
@param Buffer Pointer to buffer to checksum
@param Size Number of bytes to checksum
**/
VOID
AcpiPlatformChecksum (
IN UINT8 *Buffer,
IN UINTN Size
)
{
UINTN ChecksumOffset;
ChecksumOffset = OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER, Checksum);
//
// Set checksum to 0 first
//
Buffer[ChecksumOffset] = 0;
//
// Update checksum value
//
Buffer[ChecksumOffset] = CalculateCheckSum8(Buffer, Size);
}
/**
Entrypoint of Acpi Platform driver.
@param ImageHandle
@param SystemTable
@return EFI_SUCCESS
@return EFI_LOAD_ERROR
@return EFI_OUT_OF_RESOURCES
**/
EFI_STATUS
EFIAPI
AcpiPlatformEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_ACPI_TABLE_PROTOCOL *AcpiTable;
EFI_FIRMWARE_VOLUME2_PROTOCOL *FwVol;
INTN Instance;
EFI_ACPI_COMMON_HEADER *CurrentTable;
UINTN TableHandle;
UINT32 FvStatus;
UINTN TableSize;
UINTN Size;
EFI_STATUS TableStatus;
EFI_ACPI_DESCRIPTION_HEADER *TableHeader;
Instance = 0;
CurrentTable = NULL;
TableHandle = 0;
//
// Find the AcpiTable protocol
//
Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID**)&AcpiTable);
if (EFI_ERROR (Status)) {
return EFI_ABORTED;
}
//
// Locate the firmware volume protocol
//
Status = LocateFvInstanceWithTables (&FwVol);
if (EFI_ERROR (Status)) {
return EFI_ABORTED;
}
//
// Read tables from the storage file.
//
while (Status == EFI_SUCCESS) {
Status = FwVol->ReadSection (
FwVol,
(EFI_GUID*)PcdGetPtr (PcdAcpiTableStorageFile),
EFI_SECTION_RAW,
Instance,
(VOID**) &CurrentTable,
&Size,
&FvStatus
);
if (!EFI_ERROR(Status)) {
//
// Add the table
//
TableHeader = (EFI_ACPI_DESCRIPTION_HEADER*) (CurrentTable);
//Update specfic Acpi Table
//If the Table is updated failed, doesn't install it,
//go to find next section.
TableStatus = UpdateAcpiTable(TableHeader);
if (TableStatus == EFI_SUCCESS) {
TableHandle = 0;
TableSize = ((EFI_ACPI_DESCRIPTION_HEADER *) CurrentTable)->Length;
ASSERT (Size >= TableSize);
//
// Checksum ACPI table
//
AcpiPlatformChecksum ((UINT8*)CurrentTable, TableSize);
//
// Install ACPI table
//
Status = AcpiTable->InstallAcpiTable (
AcpiTable,
CurrentTable,
TableSize,
&TableHandle
);
}
//
// Free memory allocated by ReadSection
//
gBS->FreePool (CurrentTable);
if (EFI_ERROR(Status)) {
return EFI_ABORTED;
}
//
// Increment the instance
//
Instance++;
CurrentTable = NULL;
}
}
return EFI_SUCCESS;
}
|
