1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __XZ_CONFIG_H__
3#define __XZ_CONFIG_H__
4
5/*
6 * most of this is copied from lib/xz/xz_private.h, we can't use their defines
7 * since the boot wrapper is not built in the same environment as the rest of
8 * the kernel.
9 */
10
11#include "types.h"
12#include "swab.h"
13
14static inline uint32_t swab32p(void *p)
15{
16	uint32_t *q = p;
17
18	return swab32(*q);
19}
20
21#ifdef __LITTLE_ENDIAN__
22#define get_le32(p) (*((uint32_t *) (p)))
23#define cpu_to_be32(x) swab32(x)
24static inline u32 be32_to_cpup(const u32 *p)
25{
26	return swab32p((u32 *)p);
27}
28#else
29#define get_le32(p) swab32p(p)
30#define cpu_to_be32(x) (x)
31static inline u32 be32_to_cpup(const u32 *p)
32{
33	return *p;
34}
35#endif
36
37static inline uint32_t get_unaligned_be32(const void *p)
38{
39	return be32_to_cpup(p);
40}
41
42static inline void put_unaligned_be32(u32 val, void *p)
43{
44	*((u32 *)p) = cpu_to_be32(val);
45}
46
47#define memeq(a, b, size) (memcmp(a, b, size) == 0)
48#define memzero(buf, size) memset(buf, 0, size)
49
50/* prevent the inclusion of the xz-preboot MM headers */
51#define DECOMPR_MM_H
52#define memmove memmove
53#define XZ_EXTERN static
54
55/* xz.h needs to be included directly since we need enum xz_mode */
56#include "../../../include/linux/xz.h"
57
58#undef XZ_EXTERN
59
60#endif
61