include/linux/packing.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2016-2018 NXP
   3  * Copyright (c) 2018-2019, Vladimir Oltean <olteanv@gmail.com>
   4  */
   5 #ifndef _LINUX_PACKING_H
   6 #define _LINUX_PACKING_H
   7
   8 #include <linux/types.h>
   9 #include <linux/bitops.h>
  10
  11 #define QUIRK_MSB_ON_THE_RIGHT  BIT(0)
  12 #define QUIRK_LITTLE_ENDIAN     BIT(1)
  13 #define QUIRK_LSW32_IS_FIRST    BIT(2)
  14
  15 enum packing_op {
  16         PACK,
  17         UNPACK,
  18 };
  19
  20 int packing(void *pbuf, u64 *uval, int startbit, int endbit, size_t pbuflen,
  21             enum packing_op op, u8 quirks);
  22
  23 int pack(void *pbuf, u64 uval, size_t startbit, size_t endbit, size_t pbuflen,
  24          u8 quirks);
  25
  26 int unpack(const void *pbuf, u64 *uval, size_t startbit, size_t endbit,
  27            size_t pbuflen, u8 quirks);
  28
  29 #endif