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author | raywu <raywu0301@gmail.com> | 2018-06-15 00:00:50 +0800 |
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committer | raywu <raywu0301@gmail.com> | 2018-06-15 00:00:50 +0800 |
commit | b7c51c9cf4864df6aabb99a1ae843becd577237c (patch) | |
tree | eebe9b0d0ca03062955223097e57da84dd618b9a /ReferenceCode/Chipset/SystemAgent/BdatAccessHandler/Dxe/BdatAccessHandler.c | |
download | zprj-b7c51c9cf4864df6aabb99a1ae843becd577237c.tar.xz |
Diffstat (limited to 'ReferenceCode/Chipset/SystemAgent/BdatAccessHandler/Dxe/BdatAccessHandler.c')
-rw-r--r-- | ReferenceCode/Chipset/SystemAgent/BdatAccessHandler/Dxe/BdatAccessHandler.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/ReferenceCode/Chipset/SystemAgent/BdatAccessHandler/Dxe/BdatAccessHandler.c b/ReferenceCode/Chipset/SystemAgent/BdatAccessHandler/Dxe/BdatAccessHandler.c new file mode 100644 index 0000000..4894c8f --- /dev/null +++ b/ReferenceCode/Chipset/SystemAgent/BdatAccessHandler/Dxe/BdatAccessHandler.c @@ -0,0 +1,75 @@ +/** @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; +} |