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Diffstat (limited to 'Core/CORE_DXE/InstallConfigurationTable.c')
| -rw-r--r-- | Core/CORE_DXE/InstallConfigurationTable.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/Core/CORE_DXE/InstallConfigurationTable.c b/Core/CORE_DXE/InstallConfigurationTable.c new file mode 100644 index 0000000..8aea9bc --- /dev/null +++ b/Core/CORE_DXE/InstallConfigurationTable.c @@ -0,0 +1,230 @@ +/*++ + +Copyright (c) 2004 - 2007, Intel Corporation +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: + + InstallConfigurationTable.c + + +Abstract: + + Tiano Miscellaneous Services InstallConfigurationTable service + +--*/ + +#include "Tiano.h" +#include "DxeCore.h" + +#define CONFIG_TABLE_SIZE_INCREASED 0x10 + +UINTN mSystemTableAllocateSize = 0; + + +EFI_STATUS +CoreGetConfigTable ( + IN EFI_GUID *Guid, + OUT VOID **Table + ) +/*++ + +Routine Description: + + Find a config table by name in system table's ConfigurationTable. + +Arguments: + + Guid - The table name to look for + + Table - Pointer of the config table + +Returns: + + EFI_NOT_FOUND - Could not find the table in system table's ConfigurationTable. + + EFI_SUCCESS - Table successfully found. + +--*/ +{ + UINTN Index; + + for (Index = 0; Index < gST->NumberOfTableEntries; Index++) { + if (EfiCompareGuid (Guid, &(gST->ConfigurationTable[Index].VendorGuid))) { + *Table = gST->ConfigurationTable[Index].VendorTable; + return EFI_SUCCESS; + } + } + + return EFI_NOT_FOUND; +} + + +EFI_BOOTSERVICE +EFI_STATUS +EFIAPI +CoreInstallConfigurationTable ( + IN EFI_GUID *Guid, + IN VOID *Table + ) +/*++ + +Routine Description: + + Boot Service called to add, modify, or remove a system configuration table from + the EFI System Table. + +Arguments: + + Guid - Pointer to the GUID for the entry to add, update, or remove + Table - Pointer to the configuration table for the entry to add, update, or + remove, may be NULL. + +Returns: + + EFI_SUCCESS Guid, Table pair added, updated, or removed. + EFI_INVALID_PARAMETER Input GUID not valid. + EFI_NOT_FOUND Attempted to delete non-existant entry + EFI_OUT_OF_RESOURCES Not enough memory available + +--*/ +{ + UINTN Index; + EFI_CONFIGURATION_TABLE *EfiConfigurationTable; + + // + // If Guid is NULL, then this operation cannot be performed + // + if (Guid == NULL) { + return EFI_INVALID_PARAMETER; + } + + EfiConfigurationTable = gST->ConfigurationTable; + + // + // Search all the table for an entry that matches Guid + // + for (Index = 0; Index < gST->NumberOfTableEntries; Index++) { + if (EfiCompareGuid (Guid, &(gST->ConfigurationTable[Index].VendorGuid))) { + break; + } + } + + if (Index < gST->NumberOfTableEntries) { + // + // A match was found, so this is either a modify or a delete operation + // + if (Table != NULL) { + // + // If Table is not NULL, then this is a modify operation. + // Modify the table enty and return. + // + gST->ConfigurationTable[Index].VendorTable = Table; + +#if (EFI_SPECIFICATION_VERSION >= 0x0002000A) + // + // Signal Configuration Table change + // + CoreNotifySignalList (Guid); +#endif + + return EFI_SUCCESS; + } + + // + // A match was found and Table is NULL, so this is a delete operation. + // + gST->NumberOfTableEntries--; + + // + // Copy over deleted entry + // + EfiCommonLibCopyMem ( + &(EfiConfigurationTable[Index]), + &(gST->ConfigurationTable[Index + 1]), + (gST->NumberOfTableEntries - Index) * sizeof (EFI_CONFIGURATION_TABLE) + ); + + } else { + + // + // No matching GUIDs were found, so this is an add operation. + // + + if (Table == NULL) { + // + // If Table is NULL on an add operation, then return an error. + // + return EFI_NOT_FOUND; + } + + // + // Assume that Index == gST->NumberOfTableEntries + // + if ((Index * sizeof (EFI_CONFIGURATION_TABLE)) >= mSystemTableAllocateSize) { + // + // Allocate a table with one additional entry. + // + mSystemTableAllocateSize += (CONFIG_TABLE_SIZE_INCREASED * sizeof (EFI_CONFIGURATION_TABLE)); + EfiConfigurationTable = CoreAllocateRuntimePool (mSystemTableAllocateSize); + if (EfiConfigurationTable == NULL) { + // + // If a new table could not be allocated, then return an error. + // + return EFI_OUT_OF_RESOURCES; + } + + if (gST->ConfigurationTable != NULL) { + // + // Copy the old table to the new table. + // + EfiCommonLibCopyMem ( + EfiConfigurationTable, + gST->ConfigurationTable, + Index * sizeof (EFI_CONFIGURATION_TABLE) + ); + + // + // Free Old Table + // + CoreFreePool (gST->ConfigurationTable); + } + + // + // Update System Table + // + gST->ConfigurationTable = EfiConfigurationTable; + } + + // + // Fill in the new entry + // + EfiConfigurationTable[Index].VendorGuid = *Guid; + EfiConfigurationTable[Index].VendorTable = Table; + + // + // This is an add operation, so increment the number of table entries + // + gST->NumberOfTableEntries++; + } + + // + // Fix up the CRC-32 in the EFI System Table + // + CalculateEfiHdrCrc (&gST->Hdr); + +#if (EFI_SPECIFICATION_VERSION >= 0x0002000A) + // + // Signal Configuration Table change + // + CoreNotifySignalList (Guid); +#endif + + return EFI_SUCCESS; +} |