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, 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 #ifndef __ASSEMBLY__ 56 57 struct fdt_header { 58 fdt32_t magic; /* magic word FDT_MAGIC */ 59 fdt32_t totalsize; /* total size of DT block */ 60 fdt32_t off_dt_struct; /* offset to structure */ 61 fdt32_t off_dt_strings; /* offset to strings */ 62 fdt32_t off_mem_rsvmap; /* offset to memory reserve map */ 63 fdt32_t version; /* format version */ 64 fdt32_t last_comp_version; /* last compatible version */ 65 66 /* version 2 fields below */ 67 fdt32_t boot_cpuid_phys; /* Which physical CPU id we're 68 booting on */ 69 /* version 3 fields below */ 70 fdt32_t size_dt_strings; /* size of the strings block */ 71 72 /* version 17 fields below */ 73 fdt32_t size_dt_struct; /* size of the structure block */ 74 }; 75 76 struct fdt_reserve_entry { 77 fdt64_t address; 78 fdt64_t size; 79 }; 80 81 struct fdt_node_header { 82 fdt32_t tag; 83 char name[0]; 84 }; 85 86 struct fdt_property { 87 fdt32_t tag; 88 fdt32_t len; 89 fdt32_t nameoff; 90 char data[0]; 91 }; 92 93 #endif /* !__ASSEMBLY */ 94 95 #define FDT_MAGIC 0xd00dfeed /* 4: version, 4: total size */ 96 #define FDT_TAGSIZE sizeof(fdt32_t) 97 98 #define FDT_BEGIN_NODE 0x1 /* Start node: full name */ 99 #define FDT_END_NODE 0x2 /* End node */ 100 #define FDT_PROP 0x3 /* Property: name off, 101 size, content */ 102 #define FDT_NOP 0x4 /* nop */ 103 #define FDT_END 0x9 104 105 #define FDT_V1_SIZE (7*sizeof(fdt32_t)) 106 #define FDT_V2_SIZE (FDT_V1_SIZE + sizeof(fdt32_t)) 107 #define FDT_V3_SIZE (FDT_V2_SIZE + sizeof(fdt32_t)) 108 #define FDT_V16_SIZE FDT_V3_SIZE 109 #define FDT_V17_SIZE (FDT_V16_SIZE + sizeof(fdt32_t)) 110 111 #endif /* _FDT_H */ 112