/** @file
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Header file for PciExpress Initialization Driver.
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Copyright (c) 2019 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 _PCIEXPRESS_INITIALIZATION_DRIVER_H_
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#define _PCIEXPRESS_INITIALIZATION_DRIVER_H_
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#include <Library/HobLib.h>
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#include <IndustryStandard/Pci30.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/S3BootScriptLib.h>
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#include <Library/DebugLib.h>
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#include <Library/IoLib.h>
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#include <Library/UefiLib.h>
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#include <Library/S3BootScriptLib.h>
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#include <Library/PciSegmentLib.h>
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#include <Register/Msr.h>
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#include <SaAccess.h>
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#include <PchAccess.h>
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#include <Private/SaConfigHob.h>
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#include <Library/CpuPlatformLib.h>
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#include <Protocol/SaPolicy.h>
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#include <Private/Protocol/SaNvsArea.h>
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#define GEN1 1
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#define GEN2 2
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///
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/// Function prototypes
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///
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/**
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PCI Express Dxe Initialization.
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Run before PCI Bus Init, where assignment of Bus, Memory,
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and I/O Resources are assigned.
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@param[in] SaPolicy - SA DXE Policy protocol
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@retval EFI_SUCCESS - Pci Express successfully started and ready to be used
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@exception EFI_UNSUPPORTED - Pci Express can't be initialized
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**/
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EFI_STATUS
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PciExpressInit (
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IN SA_POLICY_PROTOCOL *SaPolicy
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);
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/**
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Find the Offset to a given Capabilities ID
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@param[in] Segment - Pci Segment Number
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@param[in] Bus - Pci Bus Number
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@param[in] Device - Pci Device Number
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@param[in] Function - Pci Function Number
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@param[in] CapId - CAPID to search fo
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@retval 0 - CAPID not found
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@retval Other - CAPID found, Offset of desired CAPID
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**/
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UINT32
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PcieFindCapId (
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IN UINT8 Segment,
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IN UINT8 Bus,
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IN UINT8 Device,
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IN UINT8 Function,
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IN UINT8 CapId
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);
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/**
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Search and return the offset of desired Pci Express Capability ID
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@param[in] Segment - Pci Segment Number
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@param[in] Bus - Pci Bus Number
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@param[in] Device - Pci Device Number
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@param[in] Function - Pci Function Number
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@param[in] CapId - Extended CAPID to search for
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@retval 0 - CAPID not found
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@retval Other - CAPID found, Offset of desired CAPID
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**/
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UINT32
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PcieFindExtendedCapId (
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IN UINT8 Segment,
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IN UINT8 Bus,
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IN UINT8 Device,
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IN UINT8 Function,
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IN UINT16 CapId
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);
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#endif
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