1 #ifndef _FDT_H 2 #define _FDT_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, see <http://www.gnu.org/licenses/>. 23 * 24 * Alternatively, 25 * 26 * b) Redistribution and use in source and binary forms, with or 27 * without modification, are permitted provided that the following 28 * conditions are met: 29 * 30 * 1. Redistributions of source code must retain the above 31 * copyright notice, this list of conditions and the following 32 * disclaimer. 33 * 2. Redistributions in binary form must reproduce the above 34 * copyright notice, this list of conditions and the following 35 * disclaimer in the documentation and/or other materials 36 * provided with the distribution. 37 * 38 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 39 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 40 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 41 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 42 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 43 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 48 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 49 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 50 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 51 */ 52 53 #ifndef __ASSEMBLY__ 54 55 struct fdt_header { 56 fdt32_t magic; /* magic word FDT_MAGIC */ 57 fdt32_t totalsize; /* total size of DT block */ 58 fdt32_t off_dt_struct; /* offset to structure */ 59 fdt32_t off_dt_strings; /* offset to strings */ 60 fdt32_t off_mem_rsvmap; /* offset to memory reserve map */ 61 fdt32_t version; /* format version */ 62 fdt32_t last_comp_version; /* last compatible version */ 63 64 /* version 2 fields below */ 65 fdt32_t boot_cpuid_phys; /* Which physical CPU id we're 66 booting on */ 67 /* version 3 fields below */ 68 fdt32_t size_dt_strings; /* size of the strings block */ 69 70 /* version 17 fields below */ 71 fdt32_t size_dt_struct; /* size of the structure block */ 72 }; 73 74 struct fdt_reserve_entry { 75 fdt64_t address; 76 fdt64_t size; 77 }; 78 79 struct fdt_node_header { 80 fdt32_t tag; 81 char name[0]; 82 }; 83 84 struct fdt_property { 85 fdt32_t tag; 86 fdt32_t len; 87 fdt32_t nameoff; 88 char data[0]; 89 }; 90 91 #endif /* !__ASSEMBLY */ 92 93 #define FDT_MAGIC 0xd00dfeed /* 4: version, 4: total size */ 94 #define FDT_TAGSIZE sizeof(fdt32_t) 95 96 #define FDT_BEGIN_NODE 0x1 /* Start node: full name */ 97 #define FDT_END_NODE 0x2 /* End node */ 98 #define FDT_PROP 0x3 /* Property: name off, 99 size, content */ 100 #define FDT_NOP 0x4 /* nop */ 101 #define FDT_END 0x9 102 103 #define FDT_V1_SIZE (7*sizeof(fdt32_t)) 104 #define FDT_V2_SIZE (FDT_V1_SIZE + sizeof(fdt32_t)) 105 #define FDT_V3_SIZE (FDT_V2_SIZE + sizeof(fdt32_t)) 106 #define FDT_V16_SIZE FDT_V3_SIZE 107 #define FDT_V17_SIZE (FDT_V16_SIZE + sizeof(fdt32_t)) 108 109 #endif /* _FDT_H */ 110