Sorry, I did not express my thought clearly.
I mean union like below:
union {
struct {
UINT8 SegmentGroup;
UINT8 Bus;
UINT8 Device;
UINT8 Function;
} Pci;
UINT32 Uid;
} DeviceId;
> -----Original Message-----
> From: Wu, Hao A
> Sent: Friday, March 23, 2018 9:20 AM
> To: edk2-devel@lists.01.org
> Cc: Wu, Hao A <hao.a...@intel.com>; Younas Khan
> <pmdyounaskhan...@gmail.com>; Kinney, Michael D
> <michael.d.kin...@intel.com>; Gao, Liming <liming....@intel.com>; Yao,
> Jiewen <jiewen....@intel.com>
> Subject: [PATCH v2] MdePkg/IndustryStandard: Add header file for SPMI ACPI
> table
>
> REF:https://bugzilla.tianocore.org/show_bug.cgi?id=840
>
> Add the header file for Service Processor Management Interface ACPI table
> definition.
>
> Cc: Younas Khan <pmdyounaskhan...@gmail.com>
> Cc: Michael Kinney <michael.d.kin...@intel.com>
> Cc: Liming Gao <liming....@intel.com>
> Cc: Jiewen Yao <jiewen....@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Hao Wu <hao.a...@intel.com>
> ---
> .../ServiceProcessorManagementInterfaceTable.h | 109
> +++++++++++++++++++++
> 1 file changed, 109 insertions(+)
> create mode 100644
> MdePkg/Include/IndustryStandard/ServiceProcessorManagementInterfaceTable
> .h
>
> diff --git
> a/MdePkg/Include/IndustryStandard/ServiceProcessorManagementInterfaceTa
> ble.h
> b/MdePkg/Include/IndustryStandard/ServiceProcessorManagementInterfaceTa
> ble.h
> new file mode 100644
> index 0000000000..bda32c8c94
> --- /dev/null
> +++
> b/MdePkg/Include/IndustryStandard/ServiceProcessorManagementInterfaceTa
> ble.h
> @@ -0,0 +1,109 @@
> +/** @file
> + Service Processor Management Interface (SPMI) ACPI table definition from
> + Intelligent Platform Management Interface Specification Second Generation.
> +
> + Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
> + This program and the accompanying materials
> + are licensed and made available under the terms and conditions of the BSD
> License
> + which accompanies this distribution. The full text of the license may be
> found at
> + http://opensource.org/licenses/bsd-license.php
> +
> + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> BASIS,
> + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> EXPRESS OR IMPLIED.
> +
> + @par Revision Reference:
> + - Intelligent Platform Management Interface Specification Second
> Generation
> + v2.0 Revision 1.1, Dated October 2013.
> +
> https://www.intel.com/content/dam/www/public/us/en/documents/specificati
> on-updates/ipmi-intelligent-platform-mgt-interface-spec-2nd-gen-v2-0-spec-up
> date.pdf
> +**/
> +#ifndef _SERVICE_PROCESSOR_MANAGEMENT_INTERFACE_TABLE_H_
> +#define _SERVICE_PROCESSOR_MANAGEMENT_INTERFACE_TABLE_H_
> +
> +#include <IndustryStandard/Acpi.h>
> +
> +#pragma pack(1)
> +
> +///
> +/// Definition for Service Processor Management Interface Description Table
> +///
> +typedef struct {
> + EFI_ACPI_DESCRIPTION_HEADER Header;
> + ///
> + /// Indicates the type of IPMI interface.
> + ///
> + UINT8 InterfaceType;
> + ///
> + /// This field must always be 01h to be compatible with any software that
> + /// implements previous versions of this spec.
> + ///
> + UINT8 Reserved1;
> + ///
> + /// Identifies the IPMI specification revision, in BCD format.
> + ///
> + UINT16 SpecificationRevision;
> + ///
> + /// Interrupt type(s) used by the interface.
> + ///
> + UINT8 InterruptType;
> + ///
> + /// The bit assignment of the SCI interrupt within the GPEx_STS register
> of a
> + /// GPE described if the FADT that the interface triggers.
> + ///
> + UINT8 Gpe;
> + ///
> + /// Reserved, must be 00h.
> + ///
> + UINT8 Reserved2;
> + ///
> + /// PCI Device Flag.
> + ///
> + UINT8 PciDeviceFlag;
> + ///
> + /// The I/O APIC or I/O SAPIC Global System Interrupt used by the
> interface.
> + ///
> + UINT32 GlobalSystemInterrupt;
> + ///
> + /// The base address of the interface register set described using the
> + /// Generic Address Structure (GAS, See [ACPI 2.0] for the definition).
> + ///
> + EFI_ACPI_2_0_GENERIC_ADDRESS_STRUCTURE BaseAddress;
> + ///
> + /// PCI Segment Group Number, if the IPMI device is a PCI device.
> + /// Otherwise, this field is byte 1 of a UID.
> + ///
> + union {
> + UINT8 PciSegmentGroup;
> + UINT8 Uid1;
> + } Byte60;
> + ///
> + /// PCI Bus Number, if the IPMI device is a PCI device.
> + /// Otherwise, this field is byte 2 of a UID.
> + ///
> + union {
> + UINT8 PciBus;
> + UINT8 Uid2;
> + } Byte61;
> + ///
> + /// PCI Device fields or byte 3 of a UID.
> + ///
> + union {
> + UINT8 PciDevice;
> + UINT8 Uid3;
> + } Byte62;
> + ///
> + /// PCI Function fields or byte 4 of a UID.
> + ///
> + union {
> + UINT8 PciFunction;
> + UINT8 Uid4;
> + } Byte63;
> + ///
> + /// This field must always be null (0x00) to be compatible with any
> software
> + /// that implements previous versions of this spec.
> + ///
> + UINT8 Reserved3;
> +} EFI_ACPI_SERVICE_PROCESSOR_MANAGEMENT_INTERFACE_TABLE;
> +
> +#pragma pack()
> +
> +#endif
> --
> 2.12.0.windows.1
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