DynamicTablesPkg: FdtHwInfoParser: Add GIC dispatcher

The GIC Dispatcher is the top-level component that is responsible
for invoking the respective parsers for GICC, GICD, GIC MSI Frame,
GIC ITS and the GICR.

Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>

DynamicTablesPkg/Library/FdtHwInfoParserLib/Gic/ArmGicDispatcher.h

@@ -0,0 +1,72 @@
+/** @file
+  Arm Gic dispatcher.
+
+  Copyright (c) 2021, ARM Limited. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+  @par Reference(s):
+  - linux/Documentation/devicetree/bindings/interrupt-controller/arm,gic.yaml
+  - linux/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml
+**/
+
+#ifndef ARM_GIC_DISPATCHER_H_
+#define ARM_GIC_DISPATCHER_H_
+
+#include <FdtHwInfoParserInclude.h>
+#include "FdtUtility.h"
+
+/** COMPATIBILITY_INFO structure for the GICv2.
+*/
+extern CONST COMPATIBILITY_INFO  GicV2CompatibleInfo;
+
+/** Get the Gic version of the interrupt-controller node.
+
+  @param [in]  Fdt          Pointer to a Flattened Device Tree (Fdt).
+  @param [in]  IntcNode     Interrupt-controller node.
+  @param [out] GicVersion   If success, contains the Gic version of the
+                            interrupt-controller node.
+
+  @retval EFI_SUCCESS             The function completed successfully.
+  @retval EFI_INVALID_PARAMETER   Invalid parameter.
+  @retval EFI_UNSUPPORTED         Unsupported.
+**/
+EFI_STATUS
+EFIAPI
+GetGicVersion (
+  IN  CONST VOID    *Fdt,
+  IN        INT32   IntcNode,
+  OUT       UINT32  *GicVersion
+  );
+
+/** Gic dispatcher.
+
+  This disptacher populates the following structures:
+   - CM_ARM_GICC_INFO
+   - CM_ARM_GICD_INFO
+   - CM_ARM_GIC_MSI_FRAME_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
+ArmGicDispatcher (
+  IN  CONST FDT_HW_INFO_PARSER_HANDLE  FdtParserHandle,
+  IN        INT32                      FdtBranch
+  );
+
+#endif // ARM_GIC_DISPATCHER_H_