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      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 /*
     56  * Portions copyright (c) 2016-2017, ARM Limited and Contributors.
     57  * All rights reserved.
     58  */
     59 
     60 #ifndef __ASSEMBLY__
     61 
     62 #include <libfdt_env.h>
     63 
     64 
     65 struct fdt_header {
     66 	fdt32_t magic;			 /* magic word FDT_MAGIC */
     67 	fdt32_t totalsize;		 /* total size of DT block */
     68 	fdt32_t off_dt_struct;		 /* offset to structure */
     69 	fdt32_t off_dt_strings;		 /* offset to strings */
     70 	fdt32_t off_mem_rsvmap;		 /* offset to memory reserve map */
     71 	fdt32_t version;		 /* format version */
     72 	fdt32_t last_comp_version;	 /* last compatible version */
     73 
     74 	/* version 2 fields below */
     75 	fdt32_t boot_cpuid_phys;	 /* Which physical CPU id we're
     76 					    booting on */
     77 	/* version 3 fields below */
     78 	fdt32_t size_dt_strings;	 /* size of the strings block */
     79 
     80 	/* version 17 fields below */
     81 	fdt32_t size_dt_struct;		 /* size of the structure block */
     82 };
     83 
     84 struct fdt_reserve_entry {
     85 	fdt64_t address;
     86 	fdt64_t size;
     87 };
     88 
     89 struct fdt_node_header {
     90 	fdt32_t tag;
     91 	char name[];
     92 };
     93 
     94 struct fdt_property {
     95 	fdt32_t tag;
     96 	fdt32_t len;
     97 	fdt32_t nameoff;
     98 	char data[];
     99 };
    100 
    101 #endif /* !__ASSEMBLY */
    102 
    103 #define FDT_MAGIC	0xd00dfeed	/* 4: version, 4: total size */
    104 #define FDT_TAGSIZE	sizeof(fdt32_t)
    105 
    106 #define FDT_BEGIN_NODE	0x1		/* Start node: full name */
    107 #define FDT_END_NODE	0x2		/* End node */
    108 #define FDT_PROP	0x3		/* Property: name off,
    109 					   size, content */
    110 #define FDT_NOP		0x4		/* nop */
    111 #define FDT_END		0x9
    112 
    113 #define FDT_V1_SIZE	(7*sizeof(fdt32_t))
    114 #define FDT_V2_SIZE	(FDT_V1_SIZE + sizeof(fdt32_t))
    115 #define FDT_V3_SIZE	(FDT_V2_SIZE + sizeof(fdt32_t))
    116 #define FDT_V16_SIZE	FDT_V3_SIZE
    117 #define FDT_V17_SIZE	(FDT_V16_SIZE + sizeof(fdt32_t))
    118 
    119 #endif /* _FDT_H */
    120