[PATCH] multiboot2: preparation to add RISC-V (64-bit) support

[Yuri Zaporozhets]

In preparation of adding RISC-V (64-bit) support to multiboot2:
    * new file include/grub/riscv64/multiboot.h added
    * MULTIBOOT2_ARCHITECTURE_RISCV64 definition added

Signed-off-by: Yuri Zaporozhets <yuriz@qrv-systems.net>
---
 include/grub/riscv64/multiboot.h | 24 ++++++++++++++++++++++++
 include/multiboot2.h             |  1 +
 2 files changed, 25 insertions(+)
 create mode 100644 include/grub/riscv64/multiboot.h

diff --git a/include/grub/riscv64/multiboot.h b/include/grub/riscv64/multiboot.h
new file mode 100644
index 000000000..f4550a046
--- /dev/null
+++ b/include/grub/riscv64/multiboot.h
@@ -0,0 +1,24 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2003,2004,2007,2008,2009  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_MULTIBOOT_CPU_HEADER
+#define GRUB_MULTIBOOT_CPU_HEADER      1
+
+#define MULTIBOOT2_ARCHITECTURE_CURRENT MULTIBOOT2_ARCHITECTURE_RISCV64
+
+#endif
diff --git a/include/multiboot2.h b/include/multiboot2.h
index a039aa043..7b25c793f 100644
--- a/include/multiboot2.h
+++ b/include/multiboot2.h
@@ -77,6 +77,7 @@
 
 #define MULTIBOOT2_ARCHITECTURE_I386  0
 #define MULTIBOOT2_ARCHITECTURE_MIPS32  4
+#define MULTIBOOT2_ARCHITECTURE_RISCV64 5
 #define MULTIBOOT_HEADER_TAG_OPTIONAL 1
 
 #define MULTIBOOT_LOAD_PREFERENCE_NONE 0
-- 
2.43.0