/** @file
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VTD Info 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 <Ppi/SiPolicy.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/VtdInfoLib.h>
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#include <Register/VtdRegs.h>
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/**
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Get VTD Engine Base Address from PCD value
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@param[in] VtdEngineNumber - Engine number for which VTD Base Adderess is required.
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@retval VTD Engine Base Address
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**/
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UINT32
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GetVtdBaseAddress (
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IN UINT8 VtdEngineNumber
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)
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{
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switch (VtdEngineNumber) {
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case 0:
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return PcdGet32(VtdEngine1BaseAddeess);
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break;
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case 2:
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return PcdGet32(VtdEngine3BaseAddeess);
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break;
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default:
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return 0x0;
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break;
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}
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}
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/**
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Read VTD Engine Base Address from VTD BAR Offsets.
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@param[in] VtdEngineNumber - Engine number for which VTD Base Adderess is required.
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@retval VTD Engine Base Address
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**/
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UINT32
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ReadVtdBaseAddress (
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IN UINT8 VtdEngineNumber
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)
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{
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UINT64 McD0BaseAddress;
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UINTN MchBar;
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McD0BaseAddress = PCI_SEGMENT_LIB_ADDRESS (SA_SEG_NUM, SA_MC_BUS, 0, 0, 0);
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MchBar = PciSegmentRead32 (McD0BaseAddress + R_SA_MCHBAR) & (~BIT0);
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switch (VtdEngineNumber) {
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case 0:
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return (MmioRead32 (MchBar + R_MCHBAR_VTD1_OFFSET) & (~BIT0));
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break;
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case 2:
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return (MmioRead32 (MchBar + R_MCHBAR_VTD3_OFFSET) & (~BIT0));
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break;
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default:
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return 0x0;
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break;
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}
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}
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/**
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GetMaxVtdEngineNumber: Get Maximum Vtd Engine Number
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@retval Vtd Engine Number
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**/
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UINT8
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GetMaxVtdEngineNumber(
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VOID
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)
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{
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return (UINT8)VTD_ENGINE_NUMBER;
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}
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