xref: /src/sys/external/bsd/libfdt/dist/libfdt_internal.h

/*	$NetBSD: libfdt_internal.h,v 1.1.1.2.8.1 2020/04/08 14:08:28 martin Exp $	*/

/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */
#ifndef LIBFDT_INTERNAL_H
#define LIBFDT_INTERNAL_H
/*
 * libfdt - Flat Device Tree manipulation
 * Copyright (C) 2006 David Gibson, IBM Corporation.
 */
#include <fdt.h>

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

int fdt_ro_probe_(const void *fdt);
#define FDT_RO_PROBE(fdt)					\
	{							\
		int totalsize_;					\
		if ((totalsize_ = fdt_ro_probe_(fdt)) < 0)	\
			return totalsize_;			\
	}

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 */