141 lines
4.9 KiB
C
141 lines
4.9 KiB
C
#ifndef LIBFDT_ENV_H
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#define LIBFDT_ENV_H
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/*
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* libfdt - Flat Device Tree manipulation
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* Copyright (C) 2006 David Gibson, IBM Corporation.
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* Copyright 2012 Kim Phillips, Freescale Semiconductor.
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*
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* libfdt is dual licensed: you can use it either under the terms of
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* the GPL, or the BSD license, at your option.
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*
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* a) This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*
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* Alternatively,
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*
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* b) Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef __CHECKER__
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#define FDT_FORCE __attribute__((force))
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#define FDT_BITWISE __attribute__((bitwise))
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#else
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#define FDT_FORCE
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#define FDT_BITWISE
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#endif
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typedef uint16_t FDT_BITWISE fdt16_t;
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typedef uint32_t FDT_BITWISE fdt32_t;
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typedef uint64_t FDT_BITWISE fdt64_t;
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#define EXTRACT_BYTE(x, n) ((unsigned long long)((uint8_t *)&x)[n])
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#define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
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#define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
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(EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
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#define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
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(EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
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(EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
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(EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
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static inline uint16_t fdt16_to_cpu(fdt16_t x)
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{
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return (FDT_FORCE uint16_t)CPU_TO_FDT16(x);
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}
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static inline fdt16_t cpu_to_fdt16(uint16_t x)
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{
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return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x);
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}
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static inline uint32_t fdt32_to_cpu(fdt32_t x)
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{
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return (FDT_FORCE uint32_t)CPU_TO_FDT32(x);
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}
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static inline fdt32_t cpu_to_fdt32(uint32_t x)
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{
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return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x);
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}
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static inline uint64_t fdt64_to_cpu(fdt64_t x)
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{
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return (FDT_FORCE uint64_t)CPU_TO_FDT64(x);
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}
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static inline fdt64_t cpu_to_fdt64(uint64_t x)
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{
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return (FDT_FORCE fdt64_t)CPU_TO_FDT64(x);
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}
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#undef CPU_TO_FDT64
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#undef CPU_TO_FDT32
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#undef CPU_TO_FDT16
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#undef EXTRACT_BYTE
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#ifdef __APPLE__
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#include <AvailabilityMacros.h>
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/* strnlen() is not available on Mac OS < 10.7 */
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# if !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED < \
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MAC_OS_X_VERSION_10_7)
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#define strnlen fdt_strnlen
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/*
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* fdt_strnlen: returns the length of a string or max_count - which ever is
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* smallest.
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* Input 1 string: the string whose size is to be determined
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* Input 2 max_count: the maximum value returned by this function
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* Output: length of the string or max_count (the smallest of the two)
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*/
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static inline size_t fdt_strnlen(const char *string, size_t max_count)
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{
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const char *p = memchr(string, 0, max_count);
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return p ? p - string : max_count;
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}
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#endif /* !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED <
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MAC_OS_X_VERSION_10_7) */
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#endif /* __APPLE__ */
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#endif /* LIBFDT_ENV_H */
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