LXR linux/scripts/dtc/libfdt/libfdt

   1#ifndef _LIBFDT_ENV_H
   2#define _LIBFDT_ENV_H
   3/*
   4 * libfdt - Flat Device Tree manipulation
   5 * Copyright (C) 2006 David Gibson, IBM Corporation.
   6 * Copyright 2012 Kim Phillips, Freescale Semiconductor.
   7 *
   8 * libfdt is dual licensed: you can use it either under the terms of
   9 * the GPL, or the BSD license, at your option.
  10 *
  11 *  a) This library is free software; you can redistribute it and/or
  12 *     modify it under the terms of the GNU General Public License as
  13 *     published by the Free Software Foundation; either version 2 of the
  14 *     License, or (at your option) any later version.
  15 *
  16 *     This library is distributed in the hope that it will be useful,
  17 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 *     GNU General Public License for more details.
  20 *
  21 *     You should have received a copy of the GNU General Public
  22 *     License along with this library; if not, write to the Free
  23 *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  24 *     MA 02110-1301 USA
  25 *
  26 * Alternatively,
  27 *
  28 *  b) Redistribution and use in source and binary forms, with or
  29 *     without modification, are permitted provided that the following
  30 *     conditions are met:
  31 *
  32 *     1. Redistributions of source code must retain the above
  33 *        copyright notice, this list of conditions and the following
  34 *        disclaimer.
  35 *     2. Redistributions in binary form must reproduce the above
  36 *        copyright notice, this list of conditions and the following
  37 *        disclaimer in the documentation and/or other materials
  38 *        provided with the distribution.
  39 *
  40 *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  41 *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  42 *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  43 *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  44 *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  45 *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  46 *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  47 *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  48 *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49 *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  50 *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  51 *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  52 *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  53 */
  54
  55#include <stddef.h>
  56#include <stdint.h>
  57#include <string.h>
  58
  59#ifdef __CHECKER__
  60#define __force __attribute__((force))
  61#define __bitwise __attribute__((bitwise))
  62#else
  63#define __force
  64#define __bitwise
  65#endif
  66
  67typedef uint16_t __bitwise fdt16_t;
  68typedef uint32_t __bitwise fdt32_t;
  69typedef uint64_t __bitwise fdt64_t;
  70
  71#define EXTRACT_BYTE(x, n)      ((unsigned long long)((uint8_t *)&x)[n])
  72#define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
  73#define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
  74                         (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
  75#define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
  76                         (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
  77                         (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
  78                         (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
  79
  80static inline uint16_t fdt16_to_cpu(fdt16_t x)
  81{
  82        return (__force uint16_t)CPU_TO_FDT16(x);
  83}
  84static inline fdt16_t cpu_to_fdt16(uint16_t x)
  85{
  86        return (__force fdt16_t)CPU_TO_FDT16(x);
  87}
  88
  89static inline uint32_t fdt32_to_cpu(fdt32_t x)
  90{
  91        return (__force uint32_t)CPU_TO_FDT32(x);
  92}
  93static inline fdt32_t cpu_to_fdt32(uint32_t x)
  94{
  95        return (__force fdt32_t)CPU_TO_FDT32(x);
  96}
  97
  98static inline uint64_t fdt64_to_cpu(fdt64_t x)
  99{
 100        return (__force uint64_t)CPU_TO_FDT64(x);
 101}
 102static inline fdt64_t cpu_to_fdt64(uint64_t x)
 103{
 104        return (__force fdt64_t)CPU_TO_FDT64(x);
 105}
 106#undef CPU_TO_FDT64
 107#undef CPU_TO_FDT32
 108#undef CPU_TO_FDT16
 109#undef EXTRACT_BYTE
 110
 111#endif /* _LIBFDT_ENV_H */
 112