REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4076

RISC-V UEFI based platforms need to support RISCV_EFI_BOOT_PROTOCOL.
Add this protocol GUID definition and the header file required.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: Abner Chang <abner.chang@amd.com>
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Acked-by: Abner Chang <abner.chang@amd.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
---
 MdePkg/MdePkg.dec                           |  5 +++
 MdePkg/Include/Protocol/RiscVBootProtocol.h | 34 ++++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec
index e49b2d5b5f28..4f30de588a46 100644
--- a/MdePkg/MdePkg.dec
+++ b/MdePkg/MdePkg.dec
@@ -1926,6 +1926,11 @@ [Protocols]
   #
   ## Include/Protocol/ShellDynamicCommand.h
   gEfiShellDynamicCommandProtocolGuid  = { 0x3c7200e9, 0x005f, 0x4ea4, {0x87, 0xde, 0xa3, 0xdf, 0xac, 0x8a, 0x27, 0xc3 }}
+  #
+  # Protocols defined for RISC-V systems
+  #
+  ## Include/Protocol/RiscVBootProtocol.h
+  gRiscVEfiBootProtocolGuid  = { 0xccd15fec, 0x6f73, 0x4eec, { 0x83, 0x95, 0x3e, 0x69, 0xe4, 0xb9, 0x40, 0xbf }}
 
 #
 # [Error.gEfiMdePkgTokenSpaceGuid]
diff --git a/MdePkg/Include/Protocol/RiscVBootProtocol.h b/MdePkg/Include/Protocol/RiscVBootProtocol.h
new file mode 100644
index 000000000000..ed223b852d34
--- /dev/null
+++ b/MdePkg/Include/Protocol/RiscVBootProtocol.h
@@ -0,0 +1,34 @@
+/** @file
+  RISC-V Boot Protocol mandatory for RISC-V UEFI platforms.
+
+  @par Revision Reference:
+  The protocol specification can be found at
+  https://github.com/riscv-non-isa/riscv-uefi
+
+  Copyright (c) 2022, Ventana Micro Systems Inc. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef RISCV_BOOT_PROTOCOL_H_
+#define RISCV_BOOT_PROTOCOL_H_
+
+typedef struct _RISCV_EFI_BOOT_PROTOCOL RISCV_EFI_BOOT_PROTOCOL;
+
+#define RISCV_EFI_BOOT_PROTOCOL_REVISION  0x00010000
+#define RISCV_EFI_BOOT_PROTOCOL_LATEST_VERSION \
+        RISCV_EFI_BOOT_PROTOCOL_REVISION
+
+typedef
+EFI_STATUS
+(EFIAPI *EFI_GET_BOOT_HARTID)(
+  IN RISCV_EFI_BOOT_PROTOCOL   *This,
+  OUT UINTN                    *BootHartId
+  );
+
+typedef struct _RISCV_EFI_BOOT_PROTOCOL {
+  UINT64                 Revision;
+  EFI_GET_BOOT_HARTID    GetBootHartId;
+} RISCV_EFI_BOOT_PROTOCOL;
+
+#endif
-- 
2.38.0



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