Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame] | 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 | |
| 67 | typedef uint16_t __bitwise fdt16_t; |
| 68 | typedef uint32_t __bitwise fdt32_t; |
| 69 | typedef 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 | |
| 80 | static inline uint16_t fdt16_to_cpu(fdt16_t x) |
| 81 | { |
| 82 | return (__force uint16_t)CPU_TO_FDT16(x); |
| 83 | } |
| 84 | static inline fdt16_t cpu_to_fdt16(uint16_t x) |
| 85 | { |
| 86 | return (__force fdt16_t)CPU_TO_FDT16(x); |
| 87 | } |
| 88 | |
| 89 | static inline uint32_t fdt32_to_cpu(fdt32_t x) |
| 90 | { |
| 91 | return (__force uint32_t)CPU_TO_FDT32(x); |
| 92 | } |
| 93 | static inline fdt32_t cpu_to_fdt32(uint32_t x) |
| 94 | { |
| 95 | return (__force fdt32_t)CPU_TO_FDT32(x); |
| 96 | } |
| 97 | |
| 98 | static inline uint64_t fdt64_to_cpu(fdt64_t x) |
| 99 | { |
| 100 | return (__force uint64_t)CPU_TO_FDT64(x); |
| 101 | } |
| 102 | static 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 */ |