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 68 typedef uint16_t FDT_BITWISE fdt16_t; 69 typedef uint32_t FDT_BITWISE fdt32_t; 70 typedef 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 81 static inline uint16_t fdt16_to_cpu(fdt16_t x) 82 { 83 return (FDT_FORCE uint16_t)CPU_TO_FDT16(x); 84 } 85 static inline fdt16_t cpu_to_fdt16(uint16_t x) 86 { 87 return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x); 88 } 89 90 static inline uint32_t fdt32_to_cpu(fdt32_t x) 91 { 92 return (FDT_FORCE uint32_t)CPU_TO_FDT32(x); 93 } 94 static inline fdt32_t cpu_to_fdt32(uint32_t x) 95 { 96 return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x); 97 } 98 99 static inline uint64_t fdt64_to_cpu(fdt64_t x) 100 { 101 return (FDT_FORCE uint64_t)CPU_TO_FDT64(x); 102 } 103 static 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