arch/powerpc/boot/xz_config.h

   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