xref: /gem5/ext/libfdt/fdt.h

/*
 * libfdt - Flat Device Tree manipulation
 * Copyright (C) 2006 David Gibson, IBM Corporation.
 *
 *     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 _FDT_H
#define _FDT_H

#ifdef __cplusplus
extern "C" {
#endif

#ifndef __ASSEMBLY__

#include "libfdt_env.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))

#ifdef __cplusplus
}
#endif

#endif /* _FDT_H */