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/** @file
LoongArch I/O Virtualization Table (IOVT) definitions.
Copyright (C) 2026, Loongson Technology Corporation Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Reference(s):
- LoongArch I/O Virtualization Table Specification, Version v0.1
(https://www.loongson.cn/uploads/images/2024110517404135188.LoongArch-IO-Virtualization-Table-Specification.pdf)
- Advanced Configuration and Power Interface (ACPI) specification, Version 6.6
(https://uefi.org/specs/ACPI/6.6/)
**/
#pragma once
#include <IndustryStandard/Acpi.h>
#pragma pack (1)
typedef struct {
EFI_ACPI_DESCRIPTION_HEADER Header;
UINT16 IommuCount;
UINT16 IommuOffset;
UINT64 Reserved;
} EFI_ACPI_IOVT_HEADER;
#define EFI_ACPI_LOONGARCH_IOVT_REVISION 0x01
typedef struct {
UINT16 Type;
UINT16 Length;
UINT32 Flags;
UINT16 PciSegmentNumber;
UINT16 PhysicalAddressWidth;
UINT16 VirtualAddressWidth;
UINT16 MaxPageLevel;
UINT64 PageSizeSupported;
UINT32 IommuDeviceId;
UINT64 IommuBaseAddress;
UINT32 IommuRegisterSize;
UINT8 InterruptType;
UINT8 Reserved[3];
UINT32 GlobalSystemInterrupt;
UINT32 ProximityDomain;
UINT32 MaxDeviceNum;
UINT32 NumberOfDeviceEntries;
UINT32 OffsetOfDeviceEntries;
} EFI_ACPI_IOVT_IOMMU;
#define EFI_ACPI_IOVT_TYPE_LOONGARCH_V1 0x0000
#define EFI_ACPI_IOVT_FLAG_PCI_DEVICE BIT0
#define EFI_ACPI_IOVT_FLAG_PROXIMITY_VALID BIT1
#define EFI_ACPI_IOVT_FLAG_DEVICE_SCOPE_SEGMENT BIT2
#define EFI_ACPI_IOVT_FLAG_HW_CAPABILITY BIT3
#define EFI_ACPI_IOVT_FLAG_MSI_ADDR_BYPASS BIT4
typedef struct {
UINT8 Type;
UINT8 Length;
UINT8 Flags;
UINT8 Reserved[3];
UINT16 DevId;
} EFI_ACPI_IOVT_DEVICE_ENTRY;
#define EFI_ACPI_IOVT_DEVICE_ENTRY_TYPE_PCI_DEVICE 0x00
#define EFI_ACPI_IOVT_DEVICE_ENTRY_TYPE_RANGE_START 0x01
#define EFI_ACPI_IOVT_DEVICE_ENTRY_TYPE_RANGE_END 0x02
#define EFI_ACPI_IOVT_IOMMU_LENGTH 64
#define EFI_ACPI_IOVT_DEVICE_ENTRY_LENGTH 8
#pragma pack ()
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