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/** @file
This code makes the BIOS Data structure available via standard ACPI mechanisms.
@copyright
Copyright (c) 1999 - 2012 Intel Corporation. All rights reserved
This software and associated documentation (if any) is furnished
under a license and may only be used or copied in accordance
with the terms of the license. Except as permitted by such
license, no part of this software or documentation may be
reproduced, stored in a retrieval system, or transmitted in any
form or by any means without the express written consent of
Intel Corporation.
This file contains an 'Intel Peripheral Driver' and uniquely
identified as "Intel Reference Module" and is
licensed for Intel CPUs and chipsets under the terms of your
license agreement with Intel or your vendor. This file may
be modified by the user, subject to additional terms of the
license agreement
**/
#include "BdatAccessHandler.h"
STATIC EFI_ACPI_TABLE_PROTOCOL *AcpiTable;
/**
Entry point of the Bdat Access Handler.
@param[in] ImageHandle EFI_HANDLE: A handle for the image that is initializing this driver
@param[in] SystemTable EFI_SYSTEM_TABLE: A pointer to the EFI system table
@retval EFI_SUCCESS: Driver initialized successfully
@exception EFI_UNSUPPORTED: A needed driver was not located
@retval EFI_OUT_OF_RESOURCES: Could not allocate needed resources
**/
EFI_STATUS
BdatAccessHandler (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
VOID *HobList;
DXE_PLATFORM_SA_POLICY_PROTOCOL *DxePlatformSaPolicy;
///
/// Check if the BDAT ACPI table support is enabled in Setup, if not then exit.
/// Get the platform setup policy.
///
Status = gBS->LocateProtocol (&gDxePlatformSaPolicyGuid, NULL, (VOID **) &DxePlatformSaPolicy);
ASSERT_EFI_ERROR (Status);
///
/// Get the start of the HOBs.
///
Status = EfiGetSystemConfigurationTable (&gEfiHobListGuid, &HobList);
ASSERT_EFI_ERROR (Status);
if (EFI_ERROR (Status)) {
return EFI_UNSUPPORTED;
}
///
/// Locate ACPI table protocol
///
Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID **) &AcpiTable);
ASSERT_EFI_ERROR (Status);
ASSERT (AcpiTable != NULL);
if (EFI_ERROR (Status)) {
return EFI_OUT_OF_RESOURCES;
}
BdatRmtHandler (DxePlatformSaPolicy, HobList, AcpiTable);
///
/// ASSERT_EFI_ERROR (Status);
///
return Status;
}
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