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/** @file
UEFI Miscellaneous boot Services InstallConfigurationTable service
Copyright (c) 2006 - 2008, 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.
**/
#include <DxeMain.h>
#define CONFIG_TABLE_SIZE_INCREASED 0x10
UINTN mSystemTableAllocateSize = 0;
/**
Find a config table by name in system table's ConfigurationTable.
@param Guid The table name to look for
@param Table Pointer of the config table
@retval EFI_NOT_FOUND Could not find the table in system table's
ConfigurationTable.
@retval EFI_SUCCESS Table successfully found.
**/
EFI_STATUS
CoreGetConfigTable (
IN EFI_GUID *Guid,
OUT VOID **Table
)
{
UINTN Index;
for (Index = 0; Index < gDxeCoreST->NumberOfTableEntries; Index++) {
if (CompareGuid (Guid, &(gDxeCoreST->ConfigurationTable[Index].VendorGuid))) {
*Table = gDxeCoreST->ConfigurationTable[Index].VendorTable;
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
/**
Boot Service called to add, modify, or remove a system configuration table from
the EFI System Table.
@param Guid Pointer to the GUID for the entry to add, update, or
remove
@param Table Pointer to the configuration table for the entry to add,
update, or remove, may be NULL.
@return EFI_SUCCESS Guid, Table pair added, updated, or removed.
@return EFI_INVALID_PARAMETER Input GUID not valid.
@return EFI_NOT_FOUND Attempted to delete non-existant entry
@return EFI_OUT_OF_RESOURCES Not enough memory available
**/
EFI_STATUS
EFIAPI
CoreInstallConfigurationTable (
IN EFI_GUID *Guid,
IN VOID *Table
)
{
UINTN Index;
EFI_CONFIGURATION_TABLE *EfiConfigurationTable;
//
// If Guid is NULL, then this operation cannot be performed
//
if (Guid == NULL) {
return EFI_INVALID_PARAMETER;
}
EfiConfigurationTable = gDxeCoreST->ConfigurationTable;
//
// Search all the table for an entry that matches Guid
//
for (Index = 0; Index < gDxeCoreST->NumberOfTableEntries; Index++) {
if (CompareGuid (Guid, &(gDxeCoreST->ConfigurationTable[Index].VendorGuid))) {
break;
}
}
if (Index < gDxeCoreST->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.
//
gDxeCoreST->ConfigurationTable[Index].VendorTable = Table;
//
// Signal Configuration Table change
//
CoreNotifySignalList (Guid);
return EFI_SUCCESS;
}
//
// A match was found and Table is NULL, so this is a delete operation.
//
gDxeCoreST->NumberOfTableEntries--;
//
// Copy over deleted entry
//
CopyMem (
&(EfiConfigurationTable[Index]),
&(gDxeCoreST->ConfigurationTable[Index + 1]),
(gDxeCoreST->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 == gDxeCoreST->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 (gDxeCoreST->ConfigurationTable != NULL) {
//
// Copy the old table to the new table.
//
CopyMem (
EfiConfigurationTable,
gDxeCoreST->ConfigurationTable,
Index * sizeof (EFI_CONFIGURATION_TABLE)
);
//
// Free Old Table
//
CoreFreePool (gDxeCoreST->ConfigurationTable);
}
//
// Update System Table
//
gDxeCoreST->ConfigurationTable = EfiConfigurationTable;
}
//
// Fill in the new entry
//
CopyMem ((VOID *)&EfiConfigurationTable[Index].VendorGuid, Guid, sizeof (EFI_GUID));
EfiConfigurationTable[Index].VendorTable = Table;
//
// This is an add operation, so increment the number of table entries
//
gDxeCoreST->NumberOfTableEntries++;
}
//
// Fix up the CRC-32 in the EFI System Table
//
CalculateEfiHdrCrc (&gDxeCoreST->Hdr);
//
// Signal Configuration Table change
//
CoreNotifySignalList (Guid);
return EFI_SUCCESS;
}
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