/** @file
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Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef __PCIE_MMCFG_H__
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#define __PCIE_MMCFG_H__
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#include <UsraAccessType.h>
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//////////////////////////////////////////////////////////////////////////
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//
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// PCIE MMCFG Table definition
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// This table was based on PCI Firmware Spec Rev 3.1
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//
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//////////////////////////////////////////////////////////////////////////
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typedef struct
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{
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UINT8 Signature[4]; // "MCFG" Signature For this Table
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UINT32 Length; // Length, in bytes, include base address allocation structures.
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UINT8 Revision; // "1"
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UINT8 SegMax; // The Maximum number of Segments
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UINT16 ValidSegMap; // Valid Segment Bit Map, LSB Bit0 for Seg0, bit1 for seg1 ...
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UINT8 Reserved[4]; // Reserved
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} PCIE_MMCFG_HEADER_TYPE;
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typedef struct
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{
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UINT32 BaseAddressL; // Processor-relative Base Address (Lower 32-bit) for the Enhanced Configuration Access Mechanism
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UINT32 BaseAddressH; // Processor-relative Base Address (Upper 32-bit) for the Enhanced Configuration Access Mechanism
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UINT16 Segment; // PCI Segment Group Number. Default is 0.
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UINT8 StartBus; // Start PCI Bus number decoded by the host bridge
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UINT8 EndBus; // End PCI Bus number decoded by the host bridge
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UINT8 Reserved[4]; // Reserved
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} PCIE_MMCFG_BASE_ADDRESS_TYPE;
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typedef struct
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{
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PCIE_MMCFG_HEADER_TYPE Header; // The header of MMCFG Table
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PCIE_MMCFG_BASE_ADDRESS_TYPE MmcfgBase[1]; // First Array of base address allocation structures.
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} PCIE_MMCFG_TABLE_TYPE;
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/**
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This Lib is used for platform to set platform specific Pcie MMCFG Table
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@param[in] MmcfgTable A pointer of the MMCFG Table structure for PCIE_MMCFG_TABLE_TYPE type
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@param[in] NumOfSeg Number of Segments in the table
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@retval <>NULL The function completed successfully.
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@retval NULL Return Error
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**/
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UINTN
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EFIAPI
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SetPcieSegMmcfgTable (
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IN PCIE_MMCFG_TABLE_TYPE *MmcfgTable,
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IN UINT32 NumOfSeg
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);
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/**
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This Lib return PCIE MMCFG Base Address
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@param[in] Address A pointer of the address of the USRA Address Structure for PCIE type
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@retval <>NULL The function completed successfully.
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@retval NULL Return Error
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**/
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UINTN
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EFIAPI
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GetPcieSegMmcfgBaseAddress (
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IN USRA_ADDRESS *Address
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);
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#endif
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