/** @file
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PCH Gbe 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) 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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#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/PchCycleDecodingLib.h>
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#include <Private/Library/PmcPrivateLib.h>
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#include <Register/PchRegs.h>
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#include <Register/PchRegsSpi.h>
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/**
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Check whether GbE region is valid
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Check SPI region directly since GbE might be disabled in SW.
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@retval TRUE Gbe Region is valid
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@retval FALSE Gbe Region is invalid
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**/
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BOOLEAN
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PchIsGbeRegionValid (
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VOID
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)
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{
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UINT32 SpiBar;
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SpiBar = PciSegmentRead32 (PCI_SEGMENT_LIB_ADDRESS (
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DEFAULT_PCI_SEGMENT_NUMBER_PCH,
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DEFAULT_PCI_BUS_NUMBER_PCH,
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PCI_DEVICE_NUMBER_PCH_SPI,
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PCI_FUNCTION_NUMBER_PCH_SPI,
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R_SPI_CFG_BAR0)) & ~B_SPI_CFG_BAR0_MASK;
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ASSERT (SpiBar != 0);
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if (MmioRead32 (SpiBar + R_SPI_MEM_FREG3_GBE) != B_SPI_MEM_FREGX_BASE_MASK) {
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return TRUE;
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}
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return FALSE;
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}
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/**
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Check whether LAN controller is enabled in the platform.
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@retval TRUE GbE is enabled
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@retval FALSE GbE is disabled
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**/
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BOOLEAN
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PchIsGbePresent (
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VOID
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)
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{
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//
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// Check PCH Support
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//
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if (!PchIsGbeSupported ()) {
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return FALSE;
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}
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//
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// Check PMC strap/fuse
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//
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if (!PmcIsGbeSupported ()) {
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return FALSE;
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}
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//
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// Check GbE NVM
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//
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if (PchIsGbeRegionValid () == FALSE) {
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return FALSE;
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}
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return TRUE;
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}
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