1 /** @file
2 UEFI Miscellaneous boot Services InstallConfigurationTable service
3
4 Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
9
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13 **/
14
15 #include "DxeMain.h"
16
17 #define CONFIG_TABLE_SIZE_INCREASED 0x10
18
19 UINTN mSystemTableAllocateSize = 0;
20
21 /**
22 Boot Service called to add, modify, or remove a system configuration table from
23 the EFI System Table.
24
25 @param Guid Pointer to the GUID for the entry to add, update, or
26 remove
27 @param Table Pointer to the configuration table for the entry to add,
28 update, or remove, may be NULL.
29
30 @return EFI_SUCCESS Guid, Table pair added, updated, or removed.
31 @return EFI_INVALID_PARAMETER Input GUID is NULL.
32 @return EFI_NOT_FOUND Attempted to delete non-existant entry
33 @return EFI_OUT_OF_RESOURCES Not enough memory available
34
35 **/
36 EFI_STATUS
37 EFIAPI
CoreInstallConfigurationTable(IN EFI_GUID * Guid,IN VOID * Table)38 CoreInstallConfigurationTable (
39 IN EFI_GUID *Guid,
40 IN VOID *Table
41 )
42 {
43 UINTN Index;
44 EFI_CONFIGURATION_TABLE *EfiConfigurationTable;
45
46 //
47 // If Guid is NULL, then this operation cannot be performed
48 //
49 if (Guid == NULL) {
50 return EFI_INVALID_PARAMETER;
51 }
52
53 EfiConfigurationTable = gDxeCoreST->ConfigurationTable;
54
55 //
56 // Search all the table for an entry that matches Guid
57 //
58 for (Index = 0; Index < gDxeCoreST->NumberOfTableEntries; Index++) {
59 if (CompareGuid (Guid, &(gDxeCoreST->ConfigurationTable[Index].VendorGuid))) {
60 break;
61 }
62 }
63
64 if (Index < gDxeCoreST->NumberOfTableEntries) {
65 //
66 // A match was found, so this is either a modify or a delete operation
67 //
68 if (Table != NULL) {
69 //
70 // If Table is not NULL, then this is a modify operation.
71 // Modify the table enty and return.
72 //
73 gDxeCoreST->ConfigurationTable[Index].VendorTable = Table;
74
75 //
76 // Signal Configuration Table change
77 //
78 CoreNotifySignalList (Guid);
79
80 return EFI_SUCCESS;
81 }
82
83 //
84 // A match was found and Table is NULL, so this is a delete operation.
85 //
86 gDxeCoreST->NumberOfTableEntries--;
87
88 //
89 // Copy over deleted entry
90 //
91 CopyMem (
92 &(EfiConfigurationTable[Index]),
93 &(gDxeCoreST->ConfigurationTable[Index + 1]),
94 (gDxeCoreST->NumberOfTableEntries - Index) * sizeof (EFI_CONFIGURATION_TABLE)
95 );
96
97 } else {
98
99 //
100 // No matching GUIDs were found, so this is an add operation.
101 //
102
103 if (Table == NULL) {
104 //
105 // If Table is NULL on an add operation, then return an error.
106 //
107 return EFI_NOT_FOUND;
108 }
109
110 //
111 // Assume that Index == gDxeCoreST->NumberOfTableEntries
112 //
113 if ((Index * sizeof (EFI_CONFIGURATION_TABLE)) >= mSystemTableAllocateSize) {
114 //
115 // Allocate a table with one additional entry.
116 //
117 mSystemTableAllocateSize += (CONFIG_TABLE_SIZE_INCREASED * sizeof (EFI_CONFIGURATION_TABLE));
118 EfiConfigurationTable = AllocateRuntimePool (mSystemTableAllocateSize);
119 if (EfiConfigurationTable == NULL) {
120 //
121 // If a new table could not be allocated, then return an error.
122 //
123 return EFI_OUT_OF_RESOURCES;
124 }
125
126 if (gDxeCoreST->ConfigurationTable != NULL) {
127 //
128 // Copy the old table to the new table.
129 //
130 CopyMem (
131 EfiConfigurationTable,
132 gDxeCoreST->ConfigurationTable,
133 Index * sizeof (EFI_CONFIGURATION_TABLE)
134 );
135
136 //
137 // Free Old Table
138 //
139 CoreFreePool (gDxeCoreST->ConfigurationTable);
140 }
141
142 //
143 // Update System Table
144 //
145 gDxeCoreST->ConfigurationTable = EfiConfigurationTable;
146 }
147
148 //
149 // Fill in the new entry
150 //
151 CopyGuid ((VOID *)&EfiConfigurationTable[Index].VendorGuid, Guid);
152 EfiConfigurationTable[Index].VendorTable = Table;
153
154 //
155 // This is an add operation, so increment the number of table entries
156 //
157 gDxeCoreST->NumberOfTableEntries++;
158 }
159
160 //
161 // Fix up the CRC-32 in the EFI System Table
162 //
163 CalculateEfiHdrCrc (&gDxeCoreST->Hdr);
164
165 //
166 // Signal Configuration Table change
167 //
168 CoreNotifySignalList (Guid);
169
170 return EFI_SUCCESS;
171 }
172