126 lines
4.6 KiB
C
Executable File
126 lines
4.6 KiB
C
Executable File
/*
|
|
* Copyright (c) 2006-2023, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2022-12-20 RT-Thread the first version
|
|
*/
|
|
|
|
#ifndef _FDT_H
|
|
#define _FDT_H
|
|
/*
|
|
* libfdt - Flat Device Tree manipulation
|
|
* Copyright (C) 2006 David Gibson, IBM Corporation.
|
|
* Copyright 2012 Kim Phillips, Freescale Semiconductor.
|
|
*
|
|
* libfdt is dual licensed: you can use it either under the terms of
|
|
* the GPL, or the BSD license, at your option.
|
|
*
|
|
* a) This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this library; if not, write to the Free
|
|
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
|
|
* MA 02110-1301 USA
|
|
*
|
|
* Alternatively,
|
|
*
|
|
* b) Redistribution and use in source and binary forms, with or
|
|
* without modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
|
|
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
|
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
|
|
struct fdt_header {
|
|
fdt32_t magic; /* magic word FDT_MAGIC */
|
|
fdt32_t totalsize; /* total size of DT block */
|
|
fdt32_t off_dt_struct; /* offset to structure */
|
|
fdt32_t off_dt_strings; /* offset to strings */
|
|
fdt32_t off_mem_rsvmap; /* offset to memory reserve map */
|
|
fdt32_t version; /* format version */
|
|
fdt32_t last_comp_version; /* last compatible version */
|
|
|
|
/* version 2 fields below */
|
|
fdt32_t boot_cpuid_phys; /* Which physical CPU id we're
|
|
booting on */
|
|
/* version 3 fields below */
|
|
fdt32_t size_dt_strings; /* size of the strings block */
|
|
|
|
/* version 17 fields below */
|
|
fdt32_t size_dt_struct; /* size of the structure block */
|
|
};
|
|
|
|
struct fdt_reserve_entry {
|
|
fdt64_t address;
|
|
fdt64_t size;
|
|
};
|
|
|
|
struct fdt_node_header {
|
|
fdt32_t tag;
|
|
char name[0];
|
|
};
|
|
|
|
struct fdt_property {
|
|
fdt32_t tag;
|
|
fdt32_t len;
|
|
fdt32_t nameoff;
|
|
char data[0];
|
|
};
|
|
|
|
#endif /* !__ASSEMBLY */
|
|
|
|
#define FDT_MAGIC 0xd00dfeed /* 4: version, 4: total size */
|
|
#define FDT_TAGSIZE sizeof(fdt32_t)
|
|
|
|
#define FDT_BEGIN_NODE 0x1 /* Start node: full name */
|
|
#define FDT_END_NODE 0x2 /* End node */
|
|
#define FDT_PROP 0x3 /* Property: name off,
|
|
size, content */
|
|
#define FDT_NOP 0x4 /* nop */
|
|
#define FDT_END 0x9
|
|
|
|
#define FDT_V1_SIZE (7*sizeof(fdt32_t))
|
|
#define FDT_V2_SIZE (FDT_V1_SIZE + sizeof(fdt32_t))
|
|
#define FDT_V3_SIZE (FDT_V2_SIZE + sizeof(fdt32_t))
|
|
#define FDT_V16_SIZE FDT_V3_SIZE
|
|
#define FDT_V17_SIZE (FDT_V16_SIZE + sizeof(fdt32_t))
|
|
|
|
#endif /* _FDT_H */
|