root/include/linux/mtd/cfi_endian.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Copyright © 2001-2010 David Woodhouse <dwmw2@infradead.org>
   4  */
   5 
   6 #include <asm/byteorder.h>
   7 
   8 #define CFI_HOST_ENDIAN 1
   9 #define CFI_LITTLE_ENDIAN 2
  10 #define CFI_BIG_ENDIAN 3
  11 
  12 #if !defined(CONFIG_MTD_CFI_ADV_OPTIONS) || defined(CONFIG_MTD_CFI_NOSWAP)
  13 #define CFI_DEFAULT_ENDIAN CFI_HOST_ENDIAN
  14 #elif defined(CONFIG_MTD_CFI_LE_BYTE_SWAP)
  15 #define CFI_DEFAULT_ENDIAN CFI_LITTLE_ENDIAN
  16 #elif defined(CONFIG_MTD_CFI_BE_BYTE_SWAP)
  17 #define CFI_DEFAULT_ENDIAN CFI_BIG_ENDIAN
  18 #else
  19 #error No CFI endianness defined
  20 #endif
  21 
  22 #define cfi_default(s) ((s)?:CFI_DEFAULT_ENDIAN)
  23 #define cfi_be(s) (cfi_default(s) == CFI_BIG_ENDIAN)
  24 #define cfi_le(s) (cfi_default(s) == CFI_LITTLE_ENDIAN)
  25 #define cfi_host(s) (cfi_default(s) == CFI_HOST_ENDIAN)
  26 
  27 #define cpu_to_cfi8(map, x) (x)
  28 #define cfi8_to_cpu(map, x) (x)
  29 #define cpu_to_cfi16(map, x) _cpu_to_cfi(16, (map)->swap, (x))
  30 #define cpu_to_cfi32(map, x) _cpu_to_cfi(32, (map)->swap, (x))
  31 #define cpu_to_cfi64(map, x) _cpu_to_cfi(64, (map)->swap, (x))
  32 #define cfi16_to_cpu(map, x) _cfi_to_cpu(16, (map)->swap, (x))
  33 #define cfi32_to_cpu(map, x) _cfi_to_cpu(32, (map)->swap, (x))
  34 #define cfi64_to_cpu(map, x) _cfi_to_cpu(64, (map)->swap, (x))
  35 
  36 #define _cpu_to_cfi(w, s, x) (cfi_host(s)?(x):_swap_to_cfi(w, s, x))
  37 #define _cfi_to_cpu(w, s, x) (cfi_host(s)?(x):_swap_to_cpu(w, s, x))
  38 #define _swap_to_cfi(w, s, x) (cfi_be(s)?cpu_to_be##w(x):cpu_to_le##w(x))
  39 #define _swap_to_cpu(w, s, x) (cfi_be(s)?be##w##_to_cpu(x):le##w##_to_cpu(x))