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Diffstat (limited to 'ReferenceCode/Chipset/SystemAgent/BdatAccessHandler/Dxe/BdatRmtHandler.c')
| -rw-r--r-- | ReferenceCode/Chipset/SystemAgent/BdatAccessHandler/Dxe/BdatRmtHandler.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/ReferenceCode/Chipset/SystemAgent/BdatAccessHandler/Dxe/BdatRmtHandler.c b/ReferenceCode/Chipset/SystemAgent/BdatAccessHandler/Dxe/BdatRmtHandler.c new file mode 100644 index 0000000..8fbe3d2 --- /dev/null +++ b/ReferenceCode/Chipset/SystemAgent/BdatAccessHandler/Dxe/BdatRmtHandler.c @@ -0,0 +1,152 @@ +/** @file + Copies the memory related timing and configuration information into the + Compatible BIOS data (BDAT) table. + +@copyright + Copyright (c) 2010 - 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" +#include "McMain.h" + +#ifdef BDAT_SUPPORT +/// +/// Data definitions & structures +/// +EFI_GUID gMemoryInitHobGuid = EFI_MEMORY_RESTORE_DATA_GUID; + +/// +/// Bdat Access Handler instance data structure +/// +STATIC EFI_BDAT_ACPI_DESCRIPTION_TABLE mRmtAcpiTable = { + EFI_BDAT_TABLE_SIGNATURE, ///< Signature + sizeof (EFI_BDAT_ACPI_DESCRIPTION_TABLE), ///< Length + 0x01, ///< Revision [01] + 0, ///< Checksum + ' ', ///< OEM ID + ' ', ///< . + ' ', ///< . + ' ', ///< . + ' ', ///< . + ' ', ///< . + 0, ///< OEM Table ID + 0, ///< OEM Revision [0x00000000] + 0, ///< Creator ID + 0, ///< Creator Revision + 0, ///< System Memory Address Space ID + 0, + 0, + 0, + EFI_BDAT_ACPI_POINTER, +}; +#endif + +/** + Entry point of the Bdat RMT Access Handler. + + @param[in] DxePlatformSaPolicy : A pointer to Dxe platform policy + @param[in] HobList : A pointer to the HOB list + @param[in] AcpiTable : A pointer to ACPI 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 +BdatRmtHandler ( + IN DXE_PLATFORM_SA_POLICY_PROTOCOL *DxePlatformSaPolicy, + IN VOID *HobList, + IN EFI_ACPI_TABLE_PROTOCOL *AcpiTable + ) +{ +#ifdef BDAT_SUPPORT + EFI_STATUS Status; + VOID *Buffer; + RmtData *rmtBdat; + HOB_SAVE_MEMORY_DATA *RmtHobData; + UINTN AcpiTableKey; + UINT64 TempBuffer; + UINT16 BufferSize; + UINT32 *ScratchPad; + + Buffer = NULL; + rmtBdat = NULL; + BufferSize = 0; + Status = EFI_SUCCESS; + if (!DxePlatformSaPolicy->MemoryConfig->RmtBdatEnable) { + return EFI_UNSUPPORTED; + } + /// + /// Get the Compatible BIOS structure PMT BDAT from the HOB. + /// + RmtHobData = GetNextGuidHob (&gMemoryInitHobGuid, HobList); + if (RmtHobData == NULL) { + return EFI_UNSUPPORTED; + } + /// + /// Allocate and clear memory, in 4kb pages + /// + BufferSize = sizeof (RmtData); + + Status = (gBS->AllocatePages) (AllocateAnyPages, EfiReservedMemoryType, EFI_SIZE_TO_PAGES (BufferSize), (EFI_PHYSICAL_ADDRESS *) &Buffer); + if (EFI_ERROR (Status)) { + return EFI_OUT_OF_RESOURCES; + } + + ZeroMem (Buffer, BufferSize); + /// + /// Copy BDAT structure to Reserved memory + /// + CopyMem (Buffer, &RmtHobData->MrcData.Rmt, BufferSize); + + TempBuffer = EFI_SIGNATURE_64 ('I', 'N', 'T', 'E', 'L', 0, 0, 0); + /// + /// RMT ACPI table + /// + DEBUG ((EFI_D_INFO, "In RMT ACPI table\n")); + CopyMem (&mRmtAcpiTable.Header.OemId, &TempBuffer, sizeof (mRmtAcpiTable.Header.OemId)); + mRmtAcpiTable.Header.OemTableId = EFI_SIGNATURE_64 ('H', 'S', 'W', '-', 'L', 'P', 'T', 0); + mRmtAcpiTable.Header.CreatorId = CREATOR_ID_INTEL; + mRmtAcpiTable.Header.CreatorRevision = CREATOR_REV_INTEL; + mRmtAcpiTable.Header.OemRevision = ACPI_BDAT_OEM_REV; + /// + /// Copy pointer to RMT ACPI BDAT structure and protocol. + /// + mRmtAcpiTable.BdatGas.Address = (EFI_PHYSICAL_ADDRESS) Buffer; + /// + /// Install RMT BDAT into RMT ACPI table + /// + AcpiTableKey = 0; + Status = AcpiTable->InstallAcpiTable ( + AcpiTable, + &mRmtAcpiTable, + sizeof (EFI_BDAT_ACPI_DESCRIPTION_TABLE), + &AcpiTableKey + ); + ASSERT_EFI_ERROR (Status); + + /// + /// Write scratchpad register in MCHBAR space with address of the RMT ACPI BDAT structure. + /// + ScratchPad = (UINT32 *) ((UINT64) (RmtHobData->MrcData.SysIn.Inputs.MchBarBaseAddress) + NCDECS_CR_SCRATCHPAD_NCU_2_REG); + *ScratchPad = (UINT32) ((UINT64) Buffer); + + return Status; +#else + return EFI_UNSUPPORTED; +#endif +} |