1 /* $OpenBSD: fdt.h,v 1.6 2020/07/18 09:44:59 kettenis Exp $ */ 2 3 /* 4 * Copyright (c) 2009 Dariusz Swiderski <sfires@sfires.net> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 struct fdt_head { 20 u_int32_t fh_magic; 21 u_int32_t fh_size; 22 u_int32_t fh_struct_off; 23 u_int32_t fh_strings_off; 24 u_int32_t fh_reserve_off; 25 u_int32_t fh_version; 26 u_int32_t fh_comp_ver; /* last compatible version */ 27 u_int32_t fh_boot_cpu_id; /* fh_version >=2 */ 28 u_int32_t fh_strings_size; /* fh_version >=3 */ 29 u_int32_t fh_struct_size; /* fh_version >=17 */ 30 }; 31 32 struct fdt { 33 struct fdt_head *header; 34 char *tree; 35 char *strings; 36 char *memory; 37 char *end; 38 int version; 39 int strings_size; 40 int struct_size; 41 }; 42 43 struct fdt_reg { 44 uint64_t addr; 45 uint64_t size; 46 }; 47 48 #define FDT_MAGIC 0xd00dfeed 49 #define FDT_NODE_BEGIN 0x01 50 #define FDT_NODE_END 0x02 51 #define FDT_PROPERTY 0x03 52 #define FDT_NOP 0x04 53 #define FDT_END 0x09 54 55 #define FDT_CODE_VERSION 0x11 56 57 int fdt_init(void *); 58 void fdt_finalize(void); 59 size_t fdt_get_size(void *); 60 void *fdt_next_node(void *); 61 void *fdt_child_node(void *); 62 char *fdt_node_name(void *); 63 void *fdt_find_node(char *); 64 int fdt_node_property(void *, char *, char **); 65 int fdt_node_set_property(void *, char *, void *, int); 66 int fdt_node_add_property(void *, char *, void *, int); 67 void *fdt_parent_node(void *); 68 void *fdt_find_phandle(uint32_t); 69 int fdt_get_reg(void *, int, struct fdt_reg *); 70 int fdt_is_compatible(void *, const char *); 71 #ifdef DEBUG 72 void *fdt_print_property(void *, int); 73 void fdt_print_node(void *, int); 74 void fdt_print_tree(void); 75 #endif 76