v4.19.13 snapshot.
diff --git a/arch/h8300/include/asm/flat.h b/arch/h8300/include/asm/flat.h
new file mode 100644
index 0000000..f4cdfcb
--- /dev/null
+++ b/arch/h8300/include/asm/flat.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * arch/h8300/asm/include/flat.h -- uClinux flat-format executables
+ */
+
+#ifndef __H8300_FLAT_H__
+#define __H8300_FLAT_H__
+
+#include <asm/unaligned.h>
+
+#define flat_argvp_envp_on_stack() 1
+#define flat_old_ram_flag(flags) 1
+#define flat_reloc_valid(reloc, size) ((reloc) <= (size))
+#define flat_set_persistent(relval, p) 0
+
+/*
+ * on the H8 a couple of the relocations have an instruction in the
+ * top byte. As there can only be 24bits of address space, we just
+ * always preserve that 8bits at the top, when it isn't an instruction
+ * is is 0 (davidm@snapgear.com)
+ */
+
+#define flat_get_relocate_addr(rel) (rel & ~0x00000001)
+static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
+ u32 *addr, u32 *persistent)
+{
+ u32 val = get_unaligned((__force u32 *)rp);
+ if (!(flags & FLAT_FLAG_GOTPIC))
+ val &= 0x00ffffff;
+ *addr = val;
+ return 0;
+}
+
+static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel)
+{
+ u32 *p = (__force u32 *)rp;
+ put_unaligned((addr & 0x00ffffff) | (*(char *)p << 24), p);
+ return 0;
+}
+
+#endif /* __H8300_FLAT_H__ */