1 /* $NetBSD: fdt.h,v 1.1.1.3 2019/12/22 12:30:36 skrll Exp $ */ 2 3 /* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */ 4 #ifndef FDT_H 5 #define FDT_H 6 /* 7 * libfdt - Flat Device Tree manipulation 8 * Copyright (C) 2006 David Gibson, IBM Corporation. 9 * Copyright 2012 Kim Phillips, Freescale Semiconductor. 10 */ 11 12 #ifndef __ASSEMBLY__ 13 14 struct fdt_header { 15 fdt32_t magic; /* magic word FDT_MAGIC */ 16 fdt32_t totalsize; /* total size of DT block */ 17 fdt32_t off_dt_struct; /* offset to structure */ 18 fdt32_t off_dt_strings; /* offset to strings */ 19 fdt32_t off_mem_rsvmap; /* offset to memory reserve map */ 20 fdt32_t version; /* format version */ 21 fdt32_t last_comp_version; /* last compatible version */ 22 23 /* version 2 fields below */ 24 fdt32_t boot_cpuid_phys; /* Which physical CPU id we're 25 booting on */ 26 /* version 3 fields below */ 27 fdt32_t size_dt_strings; /* size of the strings block */ 28 29 /* version 17 fields below */ 30 fdt32_t size_dt_struct; /* size of the structure block */ 31 }; 32 33 struct fdt_reserve_entry { 34 fdt64_t address; 35 fdt64_t size; 36 }; 37 38 struct fdt_node_header { 39 fdt32_t tag; 40 char name[0]; 41 }; 42 43 struct fdt_property { 44 fdt32_t tag; 45 fdt32_t len; 46 fdt32_t nameoff; 47 char data[0]; 48 }; 49 50 #endif /* !__ASSEMBLY */ 51 52 #define FDT_MAGIC 0xd00dfeed /* 4: version, 4: total size */ 53 #define FDT_TAGSIZE sizeof(fdt32_t) 54 55 #define FDT_BEGIN_NODE 0x1 /* Start node: full name */ 56 #define FDT_END_NODE 0x2 /* End node */ 57 #define FDT_PROP 0x3 /* Property: name off, 58 size, content */ 59 #define FDT_NOP 0x4 /* nop */ 60 #define FDT_END 0x9 61 62 #define FDT_V1_SIZE (7*sizeof(fdt32_t)) 63 #define FDT_V2_SIZE (FDT_V1_SIZE + sizeof(fdt32_t)) 64 #define FDT_V3_SIZE (FDT_V2_SIZE + sizeof(fdt32_t)) 65 #define FDT_V16_SIZE FDT_V3_SIZE 66 #define FDT_V17_SIZE (FDT_V16_SIZE + sizeof(fdt32_t)) 67 68 #endif /* FDT_H */ 69