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DynamicTablesPkg: Add CEDT generator

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- Generate CEDT table from ConfigurationManager objects.
- Only CHBS and CFMWS sub-tables are supported currently.

Signed-off-by: Nick Graves <nicholasgraves@google.com>
This commit is contained in:
Nick Graves
2025-04-16 18:19:39 +00:00
committed by mergify[bot]
parent 1668fd54aa
commit f6b99eea6a
5 changed files with 651 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
DynamicTablesPkg/DynamicTables.dsc.inc
View File

@@ -30,6 +30,7 @@
#
# Generators (Common)
#
DynamicTablesPkg/Library/Acpi/Common/AcpiCedtLib/AcpiCedtLib.inf
DynamicTablesPkg/Library/Acpi/Common/AcpiDbg2Lib/AcpiDbg2Lib.inf
DynamicTablesPkg/Library/Acpi/Common/AcpiFadtLib/AcpiFadtLib.inf
DynamicTablesPkg/Library/Acpi/Common/AcpiMcfgLib/AcpiMcfgLib.inf
@@ -70,6 +71,7 @@
<LibraryClasses>
# Generators
# Common
NULL|DynamicTablesPkg/Library/Acpi/Common/AcpiCedtLib/AcpiCedtLib.inf
NULL|DynamicTablesPkg/Library/Acpi/Common/AcpiFadtLib/AcpiFadtLib.inf
NULL|DynamicTablesPkg/Library/Acpi/Common/AcpiSratLib/AcpiSratLib.inf
NULL|DynamicTablesPkg/Library/Acpi/Common/AcpiSpmiLib/AcpiSpmiLib.inf
@@ -103,6 +105,7 @@
<LibraryClasses>
# Generators
# Common
NULL|DynamicTablesPkg/Library/Acpi/Common/AcpiCedtLib/AcpiCedtLib.inf
NULL|DynamicTablesPkg/Library/Acpi/Common/AcpiDbg2Lib/AcpiDbg2Lib.inf
NULL|DynamicTablesPkg/Library/Acpi/Common/AcpiFadtLib/AcpiFadtLib.inf
NULL|DynamicTablesPkg/Library/Acpi/Common/AcpiMcfgLib/AcpiMcfgLib.inf
@@ -129,4 +132,3 @@
NULL|DynamicTablesPkg/Library/Acpi/Common/AcpiSsdtCpuTopologyLib/SsdtCpuTopologyLib.inf
NULL|DynamicTablesPkg/Library/Acpi/Common/AcpiSsdtPcieLib/SsdtPcieLib.inf
}

1
DynamicTablesPkg/DynamicTablesPkg.ci.yaml
View File

@@ -104,6 +104,7 @@
"cacheablity",
"CCIDX",
"CCSIDR",
"cfmws",
"countof",
"deviceid",
"EArch",

3
DynamicTablesPkg/Include/AcpiTableGenerator.h
View File

@@ -80,6 +80,8 @@ The Dynamic Tables Framework implements the following ACPI table generators:
Configuration Manager and builds the SPMI table.
- FACS : The FACS generator collates the FACS information from the
Configuration Manager and builds the FACS table.
- CEDT : The CEDT generator collates the CEDT information from the
Configuration Manager and builds the CEDT table.
*/
/** The ACPI_TABLE_GENERATOR_ID type describes ACPI table generator ID.
@@ -114,6 +116,7 @@ typedef enum StdAcpiTableId {
EStdAcpiTableIdSsdtHpet, ///< SSDT HPET Generator
EStdAcpiTableIdSpmi, ///< SPMI Generator
EStdAcpiTableIdFacs, ///< FACS Generator
EStdAcpiTableIdCedt, ///< CEDT Generator
EStdAcpiTableIdMax
} ESTD_ACPI_TABLE_ID;

29
DynamicTablesPkg/Library/Acpi/Common/AcpiCedtLib/AcpiCedtLib.inf Normal file
View File

@@ -0,0 +1,29 @@
## @file
# CEDT Table Generator
#
# Copyright (c) 2025 Google Inc. All rights reserved.
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
##
[Defines]
INF_VERSION = 0x00010019
BASE_NAME = AcpiCedtLib
FILE_GUID = 59F0D17F-AFDC-4F26-820B-E9ADC93859CE
VERSION_STRING = 1.0
MODULE_TYPE = DXE_DRIVER
LIBRARY_CLASS = NULL|DXE_DRIVER
CONSTRUCTOR = AcpiCedtLibConstructor
DESTRUCTOR = AcpiCedtLibDestructor
[Sources]
CedtGenerator.c
[Packages]
MdePkg/MdePkg.dec
MdeModulePkg/MdeModulePkg.dec
EmbeddedPkg/EmbeddedPkg.dec
DynamicTablesPkg/DynamicTablesPkg.dec
[LibraryClasses]
BaseLib

615
DynamicTablesPkg/Library/Acpi/Common/AcpiCedtLib/CedtGenerator.c Normal file
View File

@@ -0,0 +1,615 @@
/** @file
CEDT Table Generator
Copyright (c) 2025, Google, Inc. All rights reserved. <BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Reference(s):
- Compute Express Link Specification - Revision 3.0, August 1, 2022.
**/
#include <Library/AcpiLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Protocol/AcpiTable.h>
// Module specific include files.
#include <AcpiTableGenerator.h>
#include <ConfigurationManagerObject.h>
#include <ConfigurationManagerHelper.h>
#include <Library/TableHelperLib.h>
#include <Protocol/ConfigurationManagerProtocol.h>
#include <IndustryStandard/Cxl.h>
#include <IndustryStandard/Acpi64.h>
#include "Base.h"
#include "IndustryStandard/Acpi10.h"
#include "Library/BaseLib.h"
/** ARM standard CEDT Generator
Requirements:
The following Configuration Manager Object(s) are required by
this Generator:
- EArchCommonObjCxlHostBridgeInfo
- EArchCommonObjCxlFixedMemoryWindowInfo
*/
/** Retrieve the CXL host bridge info.
*/
GET_OBJECT_LIST (
EObjNameSpaceArchCommon,
EArchCommonObjCxlHostBridgeInfo,
CM_ARCH_COMMON_CXL_HOST_BRIDGE_INFO
);
/** Retrieve the CXL fixed memory window info.
*/
GET_OBJECT_LIST (
EObjNameSpaceArchCommon,
EArchCommonObjCxlFixedMemoryWindowInfo,
CM_ARCH_COMMON_CXL_FIXED_MEMORY_WINDOW_INFO
);
#define EFI_ACPI_CEDT_CXL_VERSION_RCH_LENGTH_BYTES SIZE_8KB
#define EFI_ACPI_CEDT_CXL_VERSION_HB_LENGTH_BYTES SIZE_64KB
#define INVALID_INTERLEAVE_WAYS (0xFF)
#define INVALID_GRANULARITY (0xFF)
#define CFMWS_ALIGNMENT SIZE_256MB
/** Add the CXL Host Bridge Info to the CEDT table
@param [in,out] WritePointer Address of a write pointer for the CEDT table.
On return, this will point to the next write
location.
@param [in] HostBridgeList Pointer to the CXL host bridge list.
@param [in] HostBridgeCount Count of CXL host bridges.
**/
STATIC
VOID
AddCxlHostBridgeList (
IN OUT UINT8 **WritePointer,
IN CONST CM_ARCH_COMMON_CXL_HOST_BRIDGE_INFO *HostBridgeList,
IN UINT32 HostBridgeCount
)
{
EFI_ACPI_6_4_CEDT_CXL_HOST_BRIDGE_STRUCTURE *Chbs;
UINT32 Index;
ASSERT (WritePointer != NULL);
ASSERT (*WritePointer != NULL);
for (Index = 0; Index < HostBridgeCount; Index++) {
Chbs = (EFI_ACPI_6_4_CEDT_CXL_HOST_BRIDGE_STRUCTURE *)*WritePointer;
Chbs->Type = EFI_ACPI_6_4_CEDT_STRUCTURE_TYPE_CXL_HOST_BRIDGE_STRUCTURE;
Chbs->RecordLength = sizeof (EFI_ACPI_6_4_CEDT_CXL_HOST_BRIDGE_STRUCTURE);
Chbs->CxlVersion = HostBridgeList[Index].Version;
Chbs->Uid = HostBridgeList[Index].Uid;
Chbs->Base = HostBridgeList[Index].ComponentRegisterBase;
Chbs->Length = (Chbs->CxlVersion == EFI_ACPI_6_4_CEDT_CXL_HOST_BRIDGE_STRUCTURE_CXL_VERSION_HB) ?
EFI_ACPI_CEDT_CXL_VERSION_HB_LENGTH_BYTES :
EFI_ACPI_CEDT_CXL_VERSION_RCH_LENGTH_BYTES;
Chbs->Reserved0 = EFI_ACPI_RESERVED_BYTE;
Chbs->Reserved1 = EFI_ACPI_RESERVED_DWORD;
*WritePointer += Chbs->RecordLength;
}
}
/** Converts the literal number of interleave ways to register field encoding.
@param [in] NumberOfInterleaveWays Number of ways the memory is interleaved.
@retval The register field encoding for the number of interleave ways.
**/
STATIC
UINT8
GetEncodedNumberOfInterleaveWays (
IN UINT8 NumberOfInterleaveWays
)
{
switch (NumberOfInterleaveWays) {
case 1: return EFI_ACPI_6_4_CEDT_CXL_FIXED_MEMORY_WINDOW_STRUCTURE_INTERLEAVE_WAYS_NONE;
case 2: return EFI_ACPI_6_4_CEDT_CXL_FIXED_MEMORY_WINDOW_STRUCTURE_INTERLEAVE_WAYS_2_WAY;
case 3: return EFI_ACPI_6_4_CEDT_CXL_FIXED_MEMORY_WINDOW_STRUCTURE_INTERLEAVE_WAYS_3_WAY;
case 4: return EFI_ACPI_6_4_CEDT_CXL_FIXED_MEMORY_WINDOW_STRUCTURE_INTERLEAVE_WAYS_4_WAY;
case 6: return EFI_ACPI_6_4_CEDT_CXL_FIXED_MEMORY_WINDOW_STRUCTURE_INTERLEAVE_WAYS_6_WAY;
case 8: return EFI_ACPI_6_4_CEDT_CXL_FIXED_MEMORY_WINDOW_STRUCTURE_INTERLEAVE_WAYS_8_WAY;
case 12: return EFI_ACPI_6_4_CEDT_CXL_FIXED_MEMORY_WINDOW_STRUCTURE_INTERLEAVE_WAYS_12_WAY;
case 16: return EFI_ACPI_6_4_CEDT_CXL_FIXED_MEMORY_WINDOW_STRUCTURE_INTERLEAVE_WAYS_16_WAY;
default: return INVALID_INTERLEAVE_WAYS;
}
}
/** Convert the literal interleave granularity to the register field encoding.
@param [in] InterleaveGranularity Granularity of the interleave in bytes.
@retval The register field encoding for the interleave granularity.
**/
STATIC
UINT8
GetEncodedInterleaveGranularity (
IN UINT32 InterleaveGranularity
)
{
switch (InterleaveGranularity) {
case 256: return EFI_ACPI_6_4_CEDT_CXL_HOST_BRIDGE_INTERLEAVE_GRANULARITY_256B;
case 512: return EFI_ACPI_6_4_CEDT_CXL_HOST_BRIDGE_INTERLEAVE_GRANULARITY_512B;
case 1024: return EFI_ACPI_6_4_CEDT_CXL_HOST_BRIDGE_INTERLEAVE_GRANULARITY_1024B;
case 2048: return EFI_ACPI_6_4_CEDT_CXL_HOST_BRIDGE_INTERLEAVE_GRANULARITY_2048B;
case 4096: return EFI_ACPI_6_4_CEDT_CXL_HOST_BRIDGE_INTERLEAVE_GRANULARITY_4096B;
case 8192: return EFI_ACPI_6_4_CEDT_CXL_HOST_BRIDGE_INTERLEAVE_GRANULARITY_8192B;
case 16384: return EFI_ACPI_6_4_CEDT_CXL_HOST_BRIDGE_INTERLEAVE_GRANULARITY_16384B;
default: return INVALID_GRANULARITY;
}
}
/** Add the CXL Fixed Memory Window Info to the CEDT table
@param [in,out] WritePointer Address of a write pointer for the CEDT table.
On return, this will point to the next write
location.
@param [in] WindowList Pointer to the CXL fixed memory window info
list.
@param [in] WindowCount Count of CXL fixed memory windows.
@param [in] CfgMgrProtocol ConfigManagerProtocol to query data from.
**/
STATIC
EFI_STATUS
AddCxlFixedMemoryWindowList (
IN OUT UINT8 **WritePointer,
IN CONST CM_ARCH_COMMON_CXL_FIXED_MEMORY_WINDOW_INFO *WindowList,
IN UINT32 WindowCount,
IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST CfgMgrProtocol
)
{
EFI_ACPI_6_4_CEDT_CXL_FIXED_MEMORY_WINDOW_STRUCTURE *Cfmws;
UINT32 Index;
UINT32 InterleaveTargetIndex;
UINT64 Remainder;
ASSERT (WritePointer != NULL);
ASSERT (*WritePointer != NULL);
for (Index = 0; Index < WindowCount; Index++) {
Cfmws = (EFI_ACPI_6_4_CEDT_CXL_FIXED_MEMORY_WINDOW_STRUCTURE *)*WritePointer;
Cfmws->Type = EFI_ACPI_6_4_CEDT_STRUCTURE_TYPE_CXL_FIXED_MEMORY_WINDOW_STRUCTURE;
Cfmws->RecordLength =
sizeof (EFI_ACPI_6_4_CEDT_CXL_FIXED_MEMORY_WINDOW_STRUCTURE) +
(sizeof (UINT32) * WindowList[Index].NumberOfInterleaveWays);
Cfmws->BaseHpa = WindowList[Index].BaseHostPhysicalAddress;
DivU64x64Remainder (
Cfmws->BaseHpa,
CFMWS_ALIGNMENT,
&Remainder
);
if (Remainder != 0) {
DEBUG ((
DEBUG_ERROR,
"ERROR: CEDT: Unaligned window address: 0x%lx",
Cfmws->BaseHpa
));
return EFI_INVALID_PARAMETER;
}
Cfmws->WindowSize = WindowList[Index].WindowSizeBytes;
DivU64x64Remainder (
Cfmws->WindowSize,
CFMWS_ALIGNMENT * WindowList[Index].NumberOfInterleaveWays,
&Remainder
);
if (Remainder != 0) {
DEBUG ((
DEBUG_ERROR,
"ERROR: CEDT: Unaligned window size: 0x%lx",
Cfmws->WindowSize
));
return EFI_INVALID_PARAMETER;
}
Cfmws->EncodedNumberOfInterleaveWays =
GetEncodedNumberOfInterleaveWays (WindowList[Index].NumberOfInterleaveWays);
Cfmws->InterleaveArithmetic = WindowList[Index].InterleaveArithmetic;
if (Cfmws->InterleaveArithmetic > EFI_ACPI_6_4_CEDT_CXL_FIXED_MEMORY_WINDOW_STRUCTURE_INTERLEAVE_ARITHMETIC_MODULO_XOR) {
DEBUG ((
DEBUG_ERROR,
"ERROR: CEDT: Invalid interleave arithmetic: 0x%d",
Cfmws->InterleaveArithmetic
));
return EFI_INVALID_PARAMETER;
}
Cfmws->WindowRestrictions = WindowList[Index].WindowRestrictions;
if (Cfmws->WindowRestrictions &
~((EFI_ACPI_6_4_CEDT_CXL_FIXED_MEMORY_WINDOW_STRUCTURE_WINDOW_RESTRICTIONS_FIXED_DEVICE_CONFIGURATION << 1)-1))
{
DEBUG ((
DEBUG_ERROR,
"ERROR: CEDT: Invalid window restrictions: 0x%x",
Cfmws->WindowRestrictions
));
return EFI_INVALID_PARAMETER;
}
Cfmws->QtgId = WindowList[Index].QtgId;
Cfmws->HostBridgeInterleaveGranularity =
GetEncodedInterleaveGranularity (WindowList[Index].HostBridgeInterleaveGranularity);
if (Cfmws->HostBridgeInterleaveGranularity == INVALID_GRANULARITY) {
return EFI_INVALID_PARAMETER;
}
Cfmws->Reserved0 = EFI_ACPI_RESERVED_BYTE;
Cfmws->Reserved1 = EFI_ACPI_RESERVED_DWORD;
Cfmws->Reserved2 = EFI_ACPI_RESERVED_WORD;
for (InterleaveTargetIndex = 0;
InterleaveTargetIndex < WindowList[Index].NumberOfInterleaveWays;
InterleaveTargetIndex++)
{
UINT32 HostBridgeCount;
CM_ARCH_COMMON_CXL_HOST_BRIDGE_INFO *HostBridge;
EFI_STATUS Status;
Status = GetEArchCommonObjCxlHostBridgeInfo (
CfgMgrProtocol,
WindowList[Index].InterleaveTargetTokens[InterleaveTargetIndex],
&HostBridge,
&HostBridgeCount
);
if (EFI_ERROR (Status) || (HostBridgeCount != 1)) {
DEBUG ((
DEBUG_ERROR,
"ERROR: CEDT: Failed to find host bridge with token: %x",
WindowList[Index].InterleaveTargetTokens[InterleaveTargetIndex]
));
return Status;
}
Cfmws->InterleaveTargetList[InterleaveTargetIndex] = HostBridge->Uid;
}
*WritePointer += Cfmws->RecordLength;
}
return EFI_SUCCESS;
}
/** Construct the CEDT ACPI table.
This function invokes the Configuration Manager protocol interface
to get the required hardware information for generating the ACPI
table.
If this function allocates any resources then they must be freed
in the FreeXXXXTableResources function.
@param [in] This Pointer to the table generator.
@param [in] AcpiTableInfo Pointer to the ACPI Table Info.
@param [in] CfgMgrProtocol Pointer to the Configuration Manager
Protocol Interface.
@param [out] Table Pointer to the constructed ACPI Table.
@retval EFI_SUCCESS Table generated successfully.
@retval EFI_INVALID_PARAMETER A parameter is invalid.
@retval EFI_NOT_FOUND The required object was not found.
@retval EFI_BAD_BUFFER_SIZE The size returned by the Configuration
Manager is less than the Object size for the
requested object.
**/
STATIC
EFI_STATUS
EFIAPI
BuildCedtTable (
IN CONST ACPI_TABLE_GENERATOR *CONST This,
IN CONST CM_STD_OBJ_ACPI_TABLE_INFO *CONST AcpiTableInfo,
IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST CfgMgrProtocol,
OUT EFI_ACPI_DESCRIPTION_HEADER **CONST Table
)
{
EFI_STATUS Status;
UINT32 TableSize;
UINT32 Index;
UINT32 TotalInterleaveTargets;
UINT8 *WritePointer;
UINT32 HostBridgeCount;
CM_ARCH_COMMON_CXL_HOST_BRIDGE_INFO *HostBridgeList;
UINT32 WindowCount;
CM_ARCH_COMMON_CXL_FIXED_MEMORY_WINDOW_INFO *WindowList;
EFI_ACPI_6_4_CXL_EARLY_DISCOVERY_TABLE *CedtTable;
ASSERT (This != NULL);
ASSERT (AcpiTableInfo != NULL);
ASSERT (CfgMgrProtocol != NULL);
ASSERT (Table != NULL);
ASSERT (AcpiTableInfo->TableGeneratorId == This->GeneratorID);
ASSERT (AcpiTableInfo->AcpiTableSignature == This->AcpiTableSignature);
if ((AcpiTableInfo->AcpiTableRevision < This->MinAcpiTableRevision) ||
(AcpiTableInfo->AcpiTableRevision > This->AcpiTableRevision))
{
DEBUG ((
DEBUG_ERROR,
"ERROR: CEDT: Requested table revision = %d, is not supported."
"Supported table revision: Minimum = %d, Maximum = %d\n",
AcpiTableInfo->AcpiTableRevision,
This->MinAcpiTableRevision,
This->AcpiTableRevision
));
return EFI_INVALID_PARAMETER;
}
*Table = NULL;
// Get CHBS objects.
Status = GetEArchCommonObjCxlHostBridgeInfo (
CfgMgrProtocol,
CM_NULL_TOKEN,
&HostBridgeList,
&HostBridgeCount
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"ERROR: CEDT: Failed to get CXL Host Bridge Information." \
" Status = %r\n",
Status
));
goto error_handler;
}
DEBUG ((
DEBUG_INFO,
"CEDT: Host Bridge Count = %d\n",
HostBridgeCount
));
// Get CFMWS objects
Status = GetEArchCommonObjCxlFixedMemoryWindowInfo (
CfgMgrProtocol,
CM_NULL_TOKEN,
&WindowList,
&WindowCount
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"ERROR: CEDT: Failed to get CXL Fixed Memory Window Information." \
" Status = %r\n",
Status
));
goto error_handler;
}
DEBUG ((
DEBUG_INFO,
"CEDT: Window Count = %d\n",
WindowCount
));
// Calculate the CEDT Table Size
TableSize =
sizeof (EFI_ACPI_6_4_CXL_EARLY_DISCOVERY_TABLE) +
((sizeof (EFI_ACPI_6_4_CEDT_CXL_HOST_BRIDGE_STRUCTURE) * HostBridgeCount));
// CFMWS does not have a fixed size because the number of InterleaveTargets
// can vary. Its size is given by 36 + (4*NumberOfInterleaveWays).
//
// Also validate that the provided interleave ways is compliant.
TotalInterleaveTargets = 0;
for (Index = 0; Index < WindowCount; Index++) {
UINT8 InterleaveWays;
InterleaveWays = WindowList[Index].NumberOfInterleaveWays;
if (GetEncodedNumberOfInterleaveWays (InterleaveWays) == INVALID_INTERLEAVE_WAYS) {
DEBUG ((
DEBUG_ERROR,
"ERROR: CEDT: Invalid interleave ways: %d",
InterleaveWays
));
Status = EFI_INVALID_PARAMETER;
goto error_handler;
}
TotalInterleaveTargets += InterleaveWays;
}
TableSize += (TotalInterleaveTargets * sizeof (UINT32)) +
(WindowCount * sizeof (EFI_ACPI_6_4_CEDT_CXL_FIXED_MEMORY_WINDOW_STRUCTURE));
*Table = (EFI_ACPI_DESCRIPTION_HEADER *)AllocateZeroPool (TableSize);
if (*Table == NULL) {
Status = EFI_OUT_OF_RESOURCES;
DEBUG ((
DEBUG_ERROR,
"ERROR: CEDT: Failed to allocate memory for CEDT Table, Size = %d," \
" Status = %r\n",
TableSize,
Status
));
goto error_handler;
}
// Add ACPI header.
CedtTable = (EFI_ACPI_6_4_CXL_EARLY_DISCOVERY_TABLE *)*Table;
Status = AddAcpiHeader (
CfgMgrProtocol,
This,
&CedtTable->Header,
AcpiTableInfo,
TableSize
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"ERROR: CEDT: Failed to add ACPI header. Status = %r\n",
Status
));
goto error_handler;
}
WritePointer = (UINT8 *)&CedtTable->CedtStructure;
// Populate CHBS entries.
AddCxlHostBridgeList (
&WritePointer,
HostBridgeList,
HostBridgeCount
);
// Populate CFMWS entries.
Status = AddCxlFixedMemoryWindowList (
&WritePointer,
WindowList,
WindowCount,
CfgMgrProtocol
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"ERROR: CEDT: Failed to add CFMWS. Status = %r\n",
Status
));
goto error_handler;
}
return Status;
error_handler:
if (*Table != NULL) {
FreePool (*Table);
*Table = NULL;
}
return Status;
}
/** Free any resources allocated for constructing the CEDT
@param [in] This Pointer to the table generator.
@param [in] AcpiTableInfo Pointer to the ACPI Table Info.
@param [in] CfgMgrProtocol Pointer to the Configuration Manager
Protocol Interface.
@param [in, out] Table Pointer to the ACPI Table.
@retval EFI_SUCCESS The resources were freed successfully.
@retval EFI_INVALID_PARAMETER The table pointer is NULL or invalid.
**/
STATIC
EFI_STATUS
EFIAPI
FreeCedtTableResources (
IN CONST ACPI_TABLE_GENERATOR *CONST This,
IN CONST CM_STD_OBJ_ACPI_TABLE_INFO *CONST AcpiTableInfo,
IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST CfgMgrProtocol,
IN OUT EFI_ACPI_DESCRIPTION_HEADER **CONST Table
)
{
ASSERT (This != NULL);
ASSERT (AcpiTableInfo != NULL);
ASSERT (CfgMgrProtocol != NULL);
ASSERT (AcpiTableInfo->TableGeneratorId == This->GeneratorID);
ASSERT (AcpiTableInfo->AcpiTableSignature == This->AcpiTableSignature);
if ((Table == NULL) || (*Table == NULL)) {
DEBUG ((DEBUG_ERROR, "ERROR: CEDT: Invalid Table Pointer\n"));
ASSERT ((Table != NULL) && (*Table != NULL));
return EFI_INVALID_PARAMETER;
}
FreePool (*Table);
*Table = NULL;
return EFI_SUCCESS;
}
/** This macro defines the CEDT Table Generator revision.
*/
#define CEDT_GENERATOR_REVISION CREATE_REVISION (1, 0)
/** The interface for the CEDT Table Generator.
*/
STATIC
CONST
ACPI_TABLE_GENERATOR CedtGenerator = {
// Generator ID
CREATE_STD_ACPI_TABLE_GEN_ID (EStdAcpiTableIdCedt),
// Generator Description
L"ACPI.STD.CEDT.GENERATOR",
// ACPI Table Signature
EFI_ACPI_6_4_CXL_EARLY_DISCOVERY_TABLE_SIGNATURE,
// ACPI Table Revision supported by this Generator
EFI_ACPI_6_4_CEDT_CXL_EARLY_DISCOVERY_TABLE_REVISION_01,
// Minimum supported ACPI Table Revision
EFI_ACPI_6_4_CEDT_CXL_EARLY_DISCOVERY_TABLE_REVISION_01,
// Creator ID
TABLE_GENERATOR_CREATOR_ID,
// Creator Revision
CEDT_GENERATOR_REVISION,
// Build Table function
BuildCedtTable,
// Free Resource function
FreeCedtTableResources,
// Extended build function not needed
NULL,
// Extended build function not implemented by the generator.
// Hence extended free resource function is not required.
NULL
};
/** Register the Generator with the ACPI Table Factory.
@param [in] ImageHandle The handle to the image.
@param [in] SystemTable Pointer to the System Table.
@retval EFI_SUCCESS The Generator is registered.
@retval EFI_INVALID_PARAMETER A parameter is invalid.
@retval EFI_ALREADY_STARTED The Generator for the Table ID
is already registered.
**/
EFI_STATUS
EFIAPI
AcpiCedtLibConstructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
Status = RegisterAcpiTableGenerator (&CedtGenerator);
DEBUG ((DEBUG_INFO, "CEDT: Register Generator. Status = %r\n", Status));
ASSERT_EFI_ERROR (Status);
return Status;
}
/** Deregister the Generator from the ACPI Table Factory.
@param [in] ImageHandle The handle to the image.
@param [in] SystemTable Pointer to the System Table.
@retval EFI_SUCCESS The Generator is deregistered.
@retval EFI_INVALID_PARAMETER A parameter is invalid.
@retval EFI_NOT_FOUND The Generator is not registered.
**/
EFI_STATUS
EFIAPI
AcpiCedtLibDestructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
Status = DeregisterAcpiTableGenerator (&CedtGenerator);
DEBUG ((DEBUG_INFO, "CEDT: Deregister Generator. Status = %r\n", Status));
ASSERT_EFI_ERROR (Status);
return Status;
}