90 lines
3.3 KiB
C
90 lines
3.3 KiB
C
/** @file
|
|
This code makes the BIOS Data structure available via standard ACPI mechanisms.
|
|
|
|
@copyright
|
|
INTEL CONFIDENTIAL
|
|
Copyright 1999 - 2016 Intel Corporation.
|
|
|
|
The source code contained or described herein and all documents related to the
|
|
source code ("Material") are owned by Intel Corporation or its suppliers or
|
|
licensors. Title to the Material remains with Intel Corporation or its suppliers
|
|
and licensors. The Material may contain trade secrets and proprietary and
|
|
confidential information of Intel Corporation and its suppliers and licensors,
|
|
and is protected by worldwide copyright and trade secret laws and treaty
|
|
provisions. No part of the Material may be used, copied, reproduced, modified,
|
|
published, uploaded, posted, transmitted, distributed, or disclosed in any way
|
|
without Intel's prior express written permission.
|
|
|
|
No license under any patent, copyright, trade secret or other intellectual
|
|
property right is granted to or conferred upon you by disclosure or delivery
|
|
of the Materials, either expressly, by implication, inducement, estoppel or
|
|
otherwise. Any license under such intellectual property rights must be
|
|
express and approved by Intel in writing.
|
|
|
|
Unless otherwise agreed by Intel in writing, you may not remove or alter
|
|
this notice or any other notice embedded in Materials by Intel or
|
|
Intel's suppliers or licensors in any way.
|
|
|
|
This file contains an 'Intel Peripheral Driver' and is 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.
|
|
|
|
@par Specification Reference:
|
|
**/
|
|
#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
|
|
EFIAPI
|
|
BdatAccessHandler (
|
|
IN EFI_HANDLE ImageHandle,
|
|
IN EFI_SYSTEM_TABLE *SystemTable
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
VOID *HobList;
|
|
SA_POLICY_PROTOCOL *SaPolicy;
|
|
|
|
///
|
|
/// Check if the BDAT ACPI table support is enabled in Setup, if not then exit.
|
|
/// Get the platform setup policy.
|
|
///
|
|
Status = gBS->LocateProtocol (&gSaPolicyProtocolGuid, NULL, (VOID **) &SaPolicy);
|
|
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 ((AcpiTable == NULL) || EFI_ERROR (Status)) {
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
CreateBdatTable (SaPolicy, HobList, AcpiTable);
|
|
///
|
|
/// ASSERT_EFI_ERROR (Status);
|
|
///
|
|
return Status;
|
|
}
|