1 /* SPDX-License-Identifier: (BSD-2-Clause OR GPL-2.0+) */ 2 #ifndef FDT_H 3 #define FDT_H 4 /* 5 * libfdt - Flat Device Tree manipulation 6 * Copyright (C) 2006 David Gibson, IBM Corporation. 7 * Copyright 2012 Kim Phillips, Freescale Semiconductor. 8 * 9 * libfdt is dual licensed: you can use it either under the terms of 10 * the GPL, or the BSD license, at your option. 11 * 12 * a) This library is free software; you can redistribute it and/or 13 * modify it under the terms of the GNU General Public License as 14 * published by the Free Software Foundation; either version 2 of the 15 * License, or (at your option) any later version. 16 * 17 * This library is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public 23 * License along with this library; if not, write to the Free 24 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, 25 * MA 02110-1301 USA 26 * 27 * Alternatively, 28 * 29 * b) Redistribution and use in source and binary forms, with or 30 * without modification, are permitted provided that the following 31 * conditions are met: 32 * 33 * 1. Redistributions of source code must retain the above 34 * copyright notice, this list of conditions and the following 35 * disclaimer. 36 * 2. Redistributions in binary form must reproduce the above 37 * copyright notice, this list of conditions and the following 38 * disclaimer in the documentation and/or other materials 39 * provided with the distribution. 40 * 41 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 42 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 43 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 44 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 45 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 46 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 47 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 48 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 49 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 51 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 52 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 53 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 54 */ 55 56 #ifndef __ASSEMBLY__ 57 58 struct fdt_header { 59 fdt32_t magic; /* magic word FDT_MAGIC */ 60 fdt32_t totalsize; /* total size of DT block */ 61 fdt32_t off_dt_struct; /* offset to structure */ 62 fdt32_t off_dt_strings; /* offset to strings */ 63 fdt32_t off_mem_rsvmap; /* offset to memory reserve map */ 64 fdt32_t version; /* format version */ 65 fdt32_t last_comp_version; /* last compatible version */ 66 67 /* version 2 fields below */ 68 fdt32_t boot_cpuid_phys; /* Which physical CPU id we're 69 booting on */ 70 /* version 3 fields below */ 71 fdt32_t size_dt_strings; /* size of the strings block */ 72 73 /* version 17 fields below */ 74 fdt32_t size_dt_struct; /* size of the structure block */ 75 }; 76 77 struct fdt_reserve_entry { 78 fdt64_t address; 79 fdt64_t size; 80 }; 81 82 struct fdt_node_header { 83 fdt32_t tag; 84 char name[]; 85 }; 86 87 struct fdt_property { 88 fdt32_t tag; 89 fdt32_t len; 90 fdt32_t nameoff; 91 char data[]; 92 }; 93 94 #endif /* !__ASSEMBLY */ 95 96 #define FDT_MAGIC 0xd00dfeed /* 4: version, 4: total size */ 97 #define FDT_TAGSIZE sizeof(fdt32_t) 98 99 #define FDT_BEGIN_NODE 0x1 /* Start node: full name */ 100 #define FDT_END_NODE 0x2 /* End node */ 101 #define FDT_PROP 0x3 /* Property: name off, 102 size, content */ 103 #define FDT_NOP 0x4 /* nop */ 104 #define FDT_END 0x9 105 106 #define FDT_V1_SIZE (7*sizeof(fdt32_t)) 107 #define FDT_V2_SIZE (FDT_V1_SIZE + sizeof(fdt32_t)) 108 #define FDT_V3_SIZE (FDT_V2_SIZE + sizeof(fdt32_t)) 109 #define FDT_V16_SIZE FDT_V3_SIZE 110 #define FDT_V17_SIZE (FDT_V16_SIZE + sizeof(fdt32_t)) 111 112 #endif /* FDT_H */ 113