diff --git a/DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicItsParser.c b/DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicItsParser.c
new file mode 100644
index 0000000000..f23818fbd0
--- /dev/null
+++ b/DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicItsParser.c
@@ -0,0 +1,218 @@
+/** @file
+ Arm Gic Interrupt Translation Service Parser.
+
+ Copyright (c) 2021, ARM Limited. All rights reserved.
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ @par Reference(s):
+ - linux/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml
+**/
+
+#include "CmObjectDescUtility.h"
+#include "FdtHwInfoParser.h"
+#include "Gic/ArmGicDispatcher.h"
+#include "Gic/ArmGicItsParser.h"
+
+/** Parse a Gic compatible interrupt-controller node,
+ extracting GicIts information.
+
+ This parser is valid for Gic v3 and higher.
+
+ @param [in] Fdt Pointer to a Flattened Device Tree (Fdt).
+ @param [in] GicIntcNode Offset of a Gic compatible
+ interrupt-controller node.
+ @param [in] GicItsId Id for the Gic ITS node.
+ @param [in] GicItsInfo The CM_ARM_GIC_ITS_INFO to populate.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_ABORTED An error occurred.
+ @retval EFI_INVALID_PARAMETER Invalid parameter.
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+GicItsIntcNodeParser (
+ IN CONST VOID *Fdt,
+ IN INT32 GicIntcNode,
+ IN UINT32 GicItsId,
+ IN CM_ARM_GIC_ITS_INFO *GicItsInfo
+ )
+{
+ EFI_STATUS Status;
+ INT32 AddressCells;
+ CONST UINT8 *Data;
+ INT32 DataSize;
+
+ if ((Fdt == NULL) ||
+ (GicItsInfo == NULL))
+ {
+ ASSERT (0);
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Status = FdtGetParentAddressInfo (Fdt, GicIntcNode, &AddressCells, NULL);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ // Don't support more than 64 bits and less than 32 bits addresses.
+ if ((AddressCells < 1) ||
+ (AddressCells > 2))
+ {
+ ASSERT (0);
+ return EFI_ABORTED;
+ }
+
+ Data = fdt_getprop (Fdt, GicIntcNode, "reg", &DataSize);
+ if ((Data == NULL) || (DataSize < (INT32)(AddressCells * sizeof (UINT32)))) {
+ // If error or not enough space.
+ ASSERT (0);
+ return EFI_ABORTED;
+ }
+
+ if (AddressCells == 2) {
+ GicItsInfo->PhysicalBaseAddress = fdt64_to_cpu (*(UINT64 *)Data);
+ } else {
+ GicItsInfo->PhysicalBaseAddress = fdt32_to_cpu (*(UINT32 *)Data);
+ }
+
+ // Gic Its Id
+ GicItsInfo->GicItsId = GicItsId;
+
+ // {default = 0}
+ GicItsInfo->ProximityDomain = 0;
+ return Status;
+}
+
+/** CM_ARM_GIC_ITS_INFO parser function.
+
+ This parser expects FdtBranch to be a Gic interrupt-controller node.
+ Gic version must be v3 or higher.
+ typedef struct CmArmGicItsInfo {
+ UINT32 GicItsId; // {Populated}
+ UINT64 PhysicalBaseAddress; // {Populated}
+ UINT32 ProximityDomain; // {default = 0}
+ } CM_ARM_GIC_ITS_INFO;
+
+ A parser parses a Device Tree to populate a specific CmObj type. None,
+ one or many CmObj can be created by the parser.
+ The created CmObj are then handed to the parser's caller through the
+ HW_INFO_ADD_OBJECT interface.
+ This can also be a dispatcher. I.e. a function that not parsing a
+ Device Tree but calling other parsers.
+
+ @param [in] FdtParserHandle A handle to the parser instance.
+ @param [in] FdtBranch When searching for DT node name, restrict
+ the search to this Device Tree branch.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_ABORTED An error occurred.
+ @retval EFI_INVALID_PARAMETER Invalid parameter.
+ @retval EFI_NOT_FOUND Not found.
+ @retval EFI_UNSUPPORTED Unsupported.
+**/
+EFI_STATUS
+EFIAPI
+ArmGicItsInfoParser (
+ IN CONST FDT_HW_INFO_PARSER_HANDLE FdtParserHandle,
+ IN INT32 FdtBranch
+ )
+{
+ EFI_STATUS Status;
+ UINT32 GicVersion;
+ CM_ARM_GIC_ITS_INFO GicItsInfo;
+ UINT32 Index;
+ INT32 GicItsNode;
+ UINT32 GicItsNodeCount;
+ VOID *Fdt;
+
+ if (FdtParserHandle == NULL) {
+ ASSERT (0);
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Fdt = FdtParserHandle->Fdt;
+
+ if (!FdtNodeHasProperty (Fdt, FdtBranch, "interrupt-controller")) {
+ ASSERT (0);
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // Get the Gic version of the interrupt-controller.
+ Status = GetGicVersion (Fdt, FdtBranch, &GicVersion);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ if (GicVersion < 3) {
+ ASSERT (0);
+ return EFI_UNSUPPORTED;
+ }
+
+ // Count the nodes with the "msi-controller" property.
+ // The interrupt-controller itself can have this property,
+ // but the first node is skipped in the search.
+ Status = FdtCountPropNodeInBranch (
+ Fdt,
+ FdtBranch,
+ "msi-controller",
+ &GicItsNodeCount
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ if (GicItsNodeCount == 0) {
+ return EFI_NOT_FOUND;
+ }
+
+ GicItsNode = FdtBranch;
+ for (Index = 0; Index < GicItsNodeCount; Index++) {
+ ZeroMem (&GicItsInfo, sizeof (CM_ARM_GIC_ITS_INFO));
+
+ Status = FdtGetNextPropNodeInBranch (
+ Fdt,
+ FdtBranch,
+ "msi-controller",
+ &GicItsNode
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ if (Status == EFI_NOT_FOUND) {
+ // Should have found the node.
+ Status = EFI_ABORTED;
+ }
+
+ return Status;
+ }
+
+ Status = GicItsIntcNodeParser (
+ Fdt,
+ GicItsNode,
+ Index,
+ &GicItsInfo
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+
+ // Add the CmObj to the Configuration Manager.
+ Status = AddSingleCmObj (
+ FdtParserHandle,
+ CREATE_CM_ARM_OBJECT_ID (EArmObjGicItsInfo),
+ &GicItsInfo,
+ sizeof (CM_ARM_GIC_ITS_INFO),
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ return Status;
+ }
+ } // for
+
+ return Status;
+}
diff --git a/DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicItsParser.h b/DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicItsParser.h
new file mode 100644
index 0000000000..be944493e4
--- /dev/null
+++ b/DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicItsParser.h
@@ -0,0 +1,48 @@
+/** @file
+ Arm Gic Interrupt Translation Service Parser.
+
+ Copyright (c) 2021, ARM Limited. All rights reserved.
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ @par Reference(s):
+ - linux/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml
+**/
+
+#ifndef ARM_GIC_ITS_PARSER_H_
+#define ARM_GIC_ITS_PARSER_H_
+
+/** CM_ARM_GIC_ITS_INFO parser function.
+
+ This parser expects FdtBranch to be a Gic interrupt-controller node.
+ Gic version must be v3 or higher.
+ typedef struct CmArmGicItsInfo {
+ UINT32 GicItsId; // {Populated}
+ UINT64 PhysicalBaseAddress; // {Populated}
+ UINT32 ProximityDomain; // {default = 0}
+ } CM_ARM_GIC_ITS_INFO;
+
+ A parser parses a Device Tree to populate a specific CmObj type. None,
+ one or many CmObj can be created by the parser.
+ The created CmObj are then handed to the parser's caller through the
+ HW_INFO_ADD_OBJECT interface.
+ This can also be a dispatcher. I.e. a function that not parsing a
+ Device Tree but calling other parsers.
+
+ @param [in] FdtParserHandle A handle to the parser instance.
+ @param [in] FdtBranch When searching for DT node name, restrict
+ the search to this Device Tree branch.
+
+ @retval EFI_SUCCESS The function completed successfully.
+ @retval EFI_ABORTED An error occurred.
+ @retval EFI_INVALID_PARAMETER Invalid parameter.
+ @retval EFI_NOT_FOUND Not found.
+ @retval EFI_UNSUPPORTED Unsupported.
+**/
+EFI_STATUS
+EFIAPI
+ArmGicItsInfoParser (
+ IN CONST FDT_HW_INFO_PARSER_HANDLE FdtParserHandle,
+ IN INT32 FdtBranch
+ );
+
+#endif // ARM_GIC_ITS_PARSER_H_