1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * arch/h8300/asm/include/flat.h -- uClinux flat-format executables
4 */
5
6#ifndef __H8300_FLAT_H__
7#define __H8300_FLAT_H__
8
9#include <asm/unaligned.h>
10
11/*
12 * on the H8 a couple of the relocations have an instruction in the
13 * top byte.  As there can only be 24bits of address space,  we just
14 * always preserve that 8bits at the top,  when it isn't an instruction
15 * is is 0 (davidm@snapgear.com)
16 */
17
18#define	flat_get_relocate_addr(rel)		(rel & ~0x00000001)
19static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
20					u32 *addr)
21{
22	u32 val = get_unaligned((__force u32 *)rp);
23	if (!(flags & FLAT_FLAG_GOTPIC))
24		val &= 0x00ffffff;
25	*addr = val;
26	return 0;
27}
28
29static inline int flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 rel)
30{
31	u32 *p = (__force u32 *)rp;
32	put_unaligned((addr & 0x00ffffff) | (*(char *)p << 24), p);
33	return 0;
34}
35
36#endif /* __H8300_FLAT_H__ */
37