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fdt.h revision 1.1.1.2 
      1 /*	$NetBSD: fdt.h,v 1.1.1.2 2017/06/08 15:53:11 skrll Exp $	*/
      2 
      3 #ifndef _FDT_H
      4 #define _FDT_H
      5 /*
      6  * libfdt - Flat Device Tree manipulation
      7  * Copyright (C) 2006 David Gibson, IBM Corporation.
      8  * Copyright 2012 Kim Phillips, Freescale Semiconductor.
      9  *
     10  * libfdt is dual licensed: you can use it either under the terms of
     11  * the GPL, or the BSD license, at your option.
     12  *
     13  *  a) This library is free software; you can redistribute it and/or
     14  *     modify it under the terms of the GNU General Public License as
     15  *     published by the Free Software Foundation; either version 2 of the
     16  *     License, or (at your option) any later version.
     17  *
     18  *     This library is distributed in the hope that it will be useful,
     19  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
     20  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     21  *     GNU General Public License for more details.
     22  *
     23  *     You should have received a copy of the GNU General Public
     24  *     License along with this library; if not, write to the Free
     25  *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
     26  *     MA 02110-1301 USA
     27  *
     28  * Alternatively,
     29  *
     30  *  b) Redistribution and use in source and binary forms, with or
     31  *     without modification, are permitted provided that the following
     32  *     conditions are met:
     33  *
     34  *     1. Redistributions of source code must retain the above
     35  *        copyright notice, this list of conditions and the following
     36  *        disclaimer.
     37  *     2. Redistributions in binary form must reproduce the above
     38  *        copyright notice, this list of conditions and the following
     39  *        disclaimer in the documentation and/or other materials
     40  *        provided with the distribution.
     41  *
     42  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
     43  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
     44  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     45  *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     46  *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     47  *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     48  *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     49  *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     50  *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     51  *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     52  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     53  *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
     54  *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     55  */
     56 
     57 #ifndef __ASSEMBLY__
     58 
     59 struct fdt_header {
     60 	fdt32_t magic;			 /* magic word FDT_MAGIC */
     61 	fdt32_t totalsize;		 /* total size of DT block */
     62 	fdt32_t off_dt_struct;		 /* offset to structure */
     63 	fdt32_t off_dt_strings;		 /* offset to strings */
     64 	fdt32_t off_mem_rsvmap;		 /* offset to memory reserve map */
     65 	fdt32_t version;		 /* format version */
     66 	fdt32_t last_comp_version;	 /* last compatible version */
     67 
     68 	/* version 2 fields below */
     69 	fdt32_t boot_cpuid_phys;	 /* Which physical CPU id we're
     70 					    booting on */
     71 	/* version 3 fields below */
     72 	fdt32_t size_dt_strings;	 /* size of the strings block */
     73 
     74 	/* version 17 fields below */
     75 	fdt32_t size_dt_struct;		 /* size of the structure block */
     76 };
     77 
     78 struct fdt_reserve_entry {
     79 	fdt64_t address;
     80 	fdt64_t size;
     81 };
     82 
     83 struct fdt_node_header {
     84 	fdt32_t tag;
     85 	char name[0];
     86 };
     87 
     88 struct fdt_property {
     89 	fdt32_t tag;
     90 	fdt32_t len;
     91 	fdt32_t nameoff;
     92 	char data[0];
     93 };
     94 
     95 #endif /* !__ASSEMBLY */
     96 
     97 #define FDT_MAGIC	0xd00dfeed	/* 4: version, 4: total size */
     98 #define FDT_TAGSIZE	sizeof(fdt32_t)
     99 
    100 #define FDT_BEGIN_NODE	0x1		/* Start node: full name */
    101 #define FDT_END_NODE	0x2		/* End node */
    102 #define FDT_PROP	0x3		/* Property: name off,
    103 					   size, content */
    104 #define FDT_NOP		0x4		/* nop */
    105 #define FDT_END		0x9
    106 
    107 #define FDT_V1_SIZE	(7*sizeof(fdt32_t))
    108 #define FDT_V2_SIZE	(FDT_V1_SIZE + sizeof(fdt32_t))
    109 #define FDT_V3_SIZE	(FDT_V2_SIZE + sizeof(fdt32_t))
    110 #define FDT_V16_SIZE	FDT_V3_SIZE
    111 #define FDT_V17_SIZE	(FDT_V16_SIZE + sizeof(fdt32_t))
    112 
    113 #endif /* _FDT_H */
    114