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
14 static 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)
24 static 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)
31 static inline u32 be32_to_cpup(const u32 *p)
32 {
33 return *p;
34 }
35 #endif
36
37 static inline uint32_t get_unaligned_be32(const void *p)
38 {
39 return be32_to_cpup(p);
40 }
41
42 static 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
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