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 <stdlib.h>
  58#include <string.h>
  59
  60#ifdef __CHECKER__
  61#define FDT_FORCE __attribute__((force))
  62#define FDT_BITWISE __attribute__((bitwise))
  63#else
  64#define FDT_FORCE
  65#define FDT_BITWISE
  66#endif
  67
  68typedef uint16_t FDT_BITWISE fdt16_t;
  69typedef uint32_t FDT_BITWISE fdt32_t;
  70typedef uint64_t FDT_BITWISE fdt64_t;
  71
  72#define EXTRACT_BYTE(x, n)      ((unsigned long long)((uint8_t *)&x)[n])
  73#define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
  74#define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
  75                         (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
  76#define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
  77                         (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
  78                         (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
  79                         (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
  80
  81static inline uint16_t fdt16_to_cpu(fdt16_t x)
  82{
  83        return (FDT_FORCE uint16_t)CPU_TO_FDT16(x);
  84}
  85static inline fdt16_t cpu_to_fdt16(uint16_t x)
  86{
  87        return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x);
  88}
  89
  90static inline uint32_t fdt32_to_cpu(fdt32_t x)
  91{
  92        return (FDT_FORCE uint32_t)CPU_TO_FDT32(x);
  93}
  94static inline fdt32_t cpu_to_fdt32(uint32_t x)
  95{
  96        return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x);
  97}
  98
  99static inline uint64_t fdt64_to_cpu(fdt64_t x)
 100{
 101        return (FDT_FORCE uint64_t)CPU_TO_FDT64(x);
 102}
 103static inline fdt64_t cpu_to_fdt64(uint64_t x)
 104{
 105        return (FDT_FORCE fdt64_t)CPU_TO_FDT64(x);
 106}
 107#undef CPU_TO_FDT64
 108#undef CPU_TO_FDT32
 109#undef CPU_TO_FDT16
 110#undef EXTRACT_BYTE
 111
 112#endif /* _LIBFDT_ENV_H */
 113