MdeModulePkg: Clean ACPI 2.0 characters in UEFI spec
[mirror_edk2.git] / MdeModulePkg / Core / PiSmmCore / InstallConfigurationTable.c
CommitLineData
e42e9404 1/** @file\r
2 System Management System Table Services SmmInstallConfigurationTable service\r
3\r
cd5ebaa0 4 Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>\r
e42e9404 5 This program and the accompanying materials are licensed and made available \r
6 under the terms and conditions of the BSD License which accompanies this \r
7 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
13**/\r
14\r
15#include "PiSmmCore.h"\r
16\r
17#define CONFIG_TABLE_SIZE_INCREASED 0x10\r
18\r
19UINTN mSmmSystemTableAllocateSize = 0;\r
20\r
21/**\r
22 The SmmInstallConfigurationTable() function is used to maintain the list\r
23 of configuration tables that are stored in the System Management System\r
24 Table. The list is stored as an array of (GUID, Pointer) pairs. The list\r
25 must be allocated from pool memory with PoolType set to EfiRuntimeServicesData.\r
26\r
27 @param SystemTable A pointer to the SMM System Table (SMST).\r
28 @param Guid A pointer to the GUID for the entry to add, update, or remove.\r
29 @param Table A pointer to the buffer of the table to add.\r
30 @param TableSize The size of the table to install.\r
31\r
32 @retval EFI_SUCCESS The (Guid, Table) pair was added, updated, or removed.\r
33 @retval EFI_INVALID_PARAMETER Guid is not valid.\r
34 @retval EFI_NOT_FOUND An attempt was made to delete a non-existent entry.\r
35 @retval EFI_OUT_OF_RESOURCES There is not enough memory available to complete the operation.\r
36\r
37**/\r
38EFI_STATUS\r
39EFIAPI\r
40SmmInstallConfigurationTable (\r
41 IN CONST EFI_SMM_SYSTEM_TABLE2 *SystemTable,\r
42 IN CONST EFI_GUID *Guid,\r
43 IN VOID *Table,\r
44 IN UINTN TableSize\r
45 )\r
46{\r
47 UINTN Index;\r
48 EFI_CONFIGURATION_TABLE *ConfigurationTable;\r
49\r
50 //\r
51 // If Guid is NULL, then this operation cannot be performed\r
52 //\r
53 if (Guid == NULL) {\r
54 return EFI_INVALID_PARAMETER;\r
55 }\r
56\r
57 ConfigurationTable = gSmmCoreSmst.SmmConfigurationTable;\r
58\r
59 //\r
60 // Search all the table for an entry that matches Guid\r
61 //\r
62 for (Index = 0; Index < gSmmCoreSmst.NumberOfTableEntries; Index++) {\r
63 if (CompareGuid (Guid, &(ConfigurationTable[Index].VendorGuid))) {\r
64 break;\r
65 }\r
66 }\r
67\r
68 if (Index < gSmmCoreSmst.NumberOfTableEntries) {\r
69 //\r
70 // A match was found, so this is either a modify or a delete operation\r
71 //\r
72 if (Table != NULL) {\r
73 //\r
74 // If Table is not NULL, then this is a modify operation.\r
75 // Modify the table enty and return.\r
76 //\r
77 ConfigurationTable[Index].VendorTable = Table;\r
78 return EFI_SUCCESS;\r
79 }\r
80\r
81 //\r
82 // A match was found and Table is NULL, so this is a delete operation.\r
83 //\r
84 gSmmCoreSmst.NumberOfTableEntries--;\r
85\r
86 //\r
87 // Copy over deleted entry\r
88 //\r
89 CopyMem (\r
90 &(ConfigurationTable[Index]),\r
91 &(ConfigurationTable[Index + 1]),\r
92 (gSmmCoreSmst.NumberOfTableEntries - Index) * sizeof (EFI_CONFIGURATION_TABLE)\r
93 );\r
94\r
95 } else {\r
96 //\r
97 // No matching GUIDs were found, so this is an add operation.\r
98 //\r
99 if (Table == NULL) {\r
100 //\r
101 // If Table is NULL on an add operation, then return an error.\r
102 //\r
103 return EFI_NOT_FOUND;\r
104 }\r
105\r
106 //\r
107 // Assume that Index == gSmmCoreSmst.NumberOfTableEntries\r
108 //\r
109 if ((Index * sizeof (EFI_CONFIGURATION_TABLE)) >= mSmmSystemTableAllocateSize) {\r
110 //\r
111 // Allocate a table with one additional entry.\r
112 //\r
113 mSmmSystemTableAllocateSize += (CONFIG_TABLE_SIZE_INCREASED * sizeof (EFI_CONFIGURATION_TABLE));\r
114 ConfigurationTable = AllocatePool (mSmmSystemTableAllocateSize);\r
115 if (ConfigurationTable == NULL) {\r
116 //\r
117 // If a new table could not be allocated, then return an error.\r
118 //\r
119 return EFI_OUT_OF_RESOURCES;\r
120 }\r
121\r
122 if (gSmmCoreSmst.SmmConfigurationTable != NULL) {\r
123 //\r
124 // Copy the old table to the new table.\r
125 //\r
126 CopyMem (\r
127 ConfigurationTable,\r
128 gSmmCoreSmst.SmmConfigurationTable,\r
129 Index * sizeof (EFI_CONFIGURATION_TABLE)\r
130 );\r
131\r
132 //\r
133 // Free Old Table\r
134 //\r
135 FreePool (gSmmCoreSmst.SmmConfigurationTable);\r
136 }\r
137\r
138 //\r
139 // Update System Table\r
140 //\r
141 gSmmCoreSmst.SmmConfigurationTable = ConfigurationTable;\r
142 }\r
143\r
144 //\r
145 // Fill in the new entry\r
146 //\r
147 CopyGuid ((VOID *)&ConfigurationTable[Index].VendorGuid, Guid);\r
148 ConfigurationTable[Index].VendorTable = Table;\r
149\r
150 //\r
151 // This is an add operation, so increment the number of table entries\r
152 //\r
153 gSmmCoreSmst.NumberOfTableEntries++;\r
154 }\r
155\r
156 //\r
157 // CRC-32 field is ignorable for SMM System Table and should be set to zero\r
158 //\r
159\r
160 return EFI_SUCCESS;\r
161}\r