/** @file
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Pch information library.
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All function in this library is available for PEI, DXE, and SMM,
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But do not support UEFI RUNTIME environment call.
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Copyright (c) 2021, 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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#include <Base.h>
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#include <Uefi/UefiBaseType.h>
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#include <Library/IoLib.h>
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#include <Library/DebugLib.h>
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#include <Library/BaseLib.h>
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#include <Library/PciSegmentLib.h>
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#include <Library/PchInfoLib.h>
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#include <Library/PchPcrLib.h>
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#include <Library/PrintLib.h>
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#include <Library/PcdLib.h>
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#include "PchInfoLibPrivate.h"
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#include <Register/PchRegs.h>
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#include <Register/PchRegsLpc.h>
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#include <PchPcieRpInfo.h>
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#include <IndustryStandard/Pci30.h>
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#include <Library/PchPciBdfLib.h>
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/**
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Return Pch Series
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@retval PCH_SERIES Pch Series
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**/
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PCH_SERIES
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PchSeries (
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VOID
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)
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{
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return PCH_LP;
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}
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/**
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Return Pch stepping type
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@retval PCH_STEPPING Pch stepping type
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**/
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PCH_STEPPING
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PchStepping (
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VOID
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)
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{
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return 0;
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}
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/**
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Check if this is TGL PCH generation
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@retval TRUE It's TGL PCH
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@retval FALSE It's not TGL PCH
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**/
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BOOLEAN
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IsTglPch (
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VOID
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)
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{
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return (PchGeneration () == TGL_PCH);
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}
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/**
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Get PCH stepping ASCII string.
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Function determines major and minor stepping versions and writes them into a buffer.
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The return string is zero terminated
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@param [out] Buffer Output buffer of string
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@param [in] BufferSize Buffer size.
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Must not be less then PCH_STEPPING_STR_LENGTH_MAX
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@retval EFI_SUCCESS String copied successfully
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@retval EFI_INVALID_PARAMETER The stepping is not supported, or parameters are NULL
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@retval EFI_BUFFER_TOO_SMALL Input buffer size is too small
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**/
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EFI_STATUS
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PchGetSteppingStr (
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OUT CHAR8 *Buffer,
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IN UINT32 BufferSize
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)
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{
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PCH_STEPPING PchStep;
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PchStep = PchStepping ();
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if ((Buffer == NULL) || (BufferSize == 0)) {
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return EFI_INVALID_PARAMETER;
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}
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if (BufferSize < PCH_STEPPING_STR_LENGTH_MAX) {
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return EFI_BUFFER_TOO_SMALL;
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}
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PchPrintSteppingStr (Buffer, BufferSize, PchStep);
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return EFI_SUCCESS;
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}
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/**
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Get Pch Maximum Pcie Controller Number
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@retval Pch Maximum Pcie Root Port Number
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**/
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UINT8
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GetPchMaxPcieControllerNum (
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VOID
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)
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{
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return GetPchMaxPciePortNum () / PCH_PCIE_CONTROLLER_PORTS;
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}
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/**
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return support status for P2SB PCR 20-bit addressing
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@retval TRUE
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@retval FALSE
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**/
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BOOLEAN
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IsP2sb20bPcrSupported (
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VOID
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)
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{
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return FALSE;
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}
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