new file mode 100644
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+/** @file
+ ACPI CXL Early Discovery Table (CEDT) definitions.
+
+ This file contains the register definitions based on the Compute Express Link
+ (CXL) Specification Revision 3.1.
+
+ Copyright (c) 2024, Phytium Technology Co Ltd. All rights reserved.
+
+ @par Reference(s):
+ - Compute Express Link (CXL) Specification Revision 3.1.
+ (https://computeexpresslink.org/cxl-specification/)
+**/
+
+#ifndef CXL_EARLY_DISCOVERY_TABLE_H_
+#define CXL_EARLY_DISCOVERY_TABLE_H_
+
+#include <IndustryStandard/Acpi.h>
+
+///
+/// "CEDT" CXL Early Discovery Table
+///
+#define CXL_3_1_CXL_EARLY_DISCOVERY_TABLE_SIGNATURE SIGNATURE_32 ('C', 'E', 'D', 'T')
+
+#define CXL_EARLY_DISCOVERY_TABLE_REVISION_01 0x1 // CXL2.0 ~ CXL3.0
+#define CXL_EARLY_DISCOVERY_TABLE_REVISION_02 0x2 // CXL3.1
+
+#define CEDT_TYPE_CHBS 0x0
+#define CEDT_TYPE_CFMWS 0x1
+#define CEDT_TYPE_CXIMS 0x2
+#define CEDT_TYPE_RDPAS 0x3
+#define CEDT_TYPE_CSDS 0x4
+
+#pragma pack(1)
+
+///
+/// Table header
+///
+typedef struct {
+ EFI_ACPI_DESCRIPTION_HEADER Header;
+} CXL_3_1_CXL_EARLY_DISCOVERY_TABLE;
+
+///
+/// Node header definition shared by all structure types
+///
+typedef struct {
+ UINT8 Type;
+ UINT8 Reserved;
+ UINT16 Length;
+} CXL_3_1_CEDT_STRUCTURE;
+
+///
+/// Definition for CXL Host Bridge Structure (CHBS)
+///
+typedef struct {
+ CXL_3_1_CEDT_STRUCTURE Header;
+ UINT32 UID;
+ UINT32 CXLVersion;
+ UINT32 Reserved;
+ UINT64 Base;
+ UINT64 Length;
+} CXL_3_1_CXL_HOST_BRIDGE_STRUCTURE;
+
+///
+/// Definition for CXL Fixed Memory Window Structure (CFMWS)
+///
+typedef struct {
+ CXL_3_1_CEDT_STRUCTURE Header;
+ UINT32 Reserved;
+ UINT64 BaseHPA;
+ UINT64 WindowSize;
+ UINT8 InterleaveMembers;
+ UINT8 InterleaveArithmetic;
+ UINT16 Reserved1;
+ UINT32 Granularity;
+ UINT16 Restrictions;
+ UINT16 QtgId;
+ UINT32 TargetList[16];
+} CXL_3_1_CXL_FIXED_MEMORY_WINDOW_STRUCTURE;
+
+///
+/// Definition for CXL XOR Interleave Math Structure (CXIMS)
+///
+typedef struct {
+ CXL_3_1_CEDT_STRUCTURE Header;
+ UINT16 Reserved;
+ UINT8 HBIG;
+ UINT8 NIB;
+ UINT64 XORMAPLIST[4];
+} CXL_3_1_CXL_XOR_INTERLEAVE_MATH_STRUCTURE;
+
+///
+/// Definition for RCEC Downstream Port Association Structure (RDPAS)
+///
+typedef struct {
+ CXL_3_1_CEDT_STRUCTURE Header;
+ UINT16 SegmentNumber;
+ UINT16 BDF;
+ UINT8 ProtocolType;
+ UINT64 BaseAddress;
+} CXL_3_1_RCEC_DOWNSTREAM_PORT_ASSOCIATION_STRUCTURE;
+
+///
+/// Definition for CXL System Description Structure (CSDS)
+///
+typedef struct {
+ CXL_3_1_CEDT_STRUCTURE Header;
+ UINT16 Capabilities;
+ UINT16 Reserved;
+} CXL_3_1_CXL_DOWNSTREAM_PORT_ASSOCIATION_STRUCTURE;
+
+#pragma pack()
+
+#endif
This adds #defines and struct typedefs for the various structure types in the CXL3.1 CXL Early Discovery Table (CEDT). Signed-off-by: Yuquan Wang <wangyuquan1236@phytium.com.cn> --- .../IndustryStandard/CxlEarlyDiscoveryTable.h | 113 ++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 MdePkg/Include/IndustryStandard/CxlEarlyDiscoveryTable.h