xref: /gem5/ext/libfdt/libfdt_internal.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 _LIBFDT_INTERNAL_H
#define _LIBFDT_INTERNAL_H

#include <fdt.h>

#define FDT_ALIGN(x, a)		(((x) + (a) - 1) & ~((a) - 1))
#define FDT_TAGALIGN(x)		(FDT_ALIGN((x), FDT_TAGSIZE))

#define FDT_CHECK_HEADER(fdt) \
        { \
                int err; \
                if ((err = fdt_check_header(fdt)) != 0) \
                        return err; \
        }

int _fdt_check_node_offset(const void *fdt, int offset);
int _fdt_check_prop_offset(const void *fdt, int offset);
const char *_fdt_find_string(const char *strtab, int tabsize, const char *s);
int _fdt_node_end_offset(void *fdt, int nodeoffset);

static inline const void *_fdt_offset_ptr(const void *fdt, int offset)
{
        return (const char *)fdt + fdt_off_dt_struct(fdt) + offset;
}

static inline void *_fdt_offset_ptr_w(void *fdt, int offset)
{
        return (void *)(uintptr_t)_fdt_offset_ptr(fdt, offset);
}

static inline const struct fdt_reserve_entry *_fdt_mem_rsv(const void *fdt, int n)
{
        const struct fdt_reserve_entry *rsv_table =
                (const struct fdt_reserve_entry *)
                ((const char *)fdt + fdt_off_mem_rsvmap(fdt));

        return rsv_table + n;
}
static inline struct fdt_reserve_entry *_fdt_mem_rsv_w(void *fdt, int n)
{
        return (void *)(uintptr_t)_fdt_mem_rsv(fdt, n);
}

#define FDT_SW_MAGIC		(~FDT_MAGIC)

#endif /* _LIBFDT_INTERNAL_H */