/*      $NetBSD: mdesc.h,v 1.5 2016/06/22 20:13:00 palle Exp $  */
/*      $OpenBSD: mdesc.h,v 1.3 2014/11/30 22:26:14 kettenis Exp $      */
/*
* Copyright (c) 2009 Mark Kettenis
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#ifndef _MDESC_H_
#define _MDESC_H_

struct md_header {
       uint32_t        transport_version;
       uint32_t        node_blk_sz;
       uint32_t        name_blk_sz;
       uint32_t        data_blk_sz;
};

struct md_element {
       uint8_t         tag;
       uint8_t         name_len;
       uint16_t        _reserved_field;
       uint32_t        name_offset;
       union {
               struct {
                       uint32_t        data_len;
                       uint32_t        data_offset;
               } y;
               uint64_t        val;
       } d;
};

extern vaddr_t mdesc;

#ifdef _KERNEL
psize_t mdesc_get_len(void);
void    mdesc_init(vaddr_t, paddr_t, psize_t);
uint64_t mdesc_get_prop_val(int, const char *);
const char *mdesc_get_prop_str(int, const char *);
const char *mdesc_get_prop_data(int, const char *, size_t *);
int     mdesc_find(const char *, uint64_t);
int     mdesc_find_child(int, const char *, uint64_t);
int     mdesc_find_node(const char *);
int     mdesc_find_node_by_idx(int, const char *);
int     mdesc_next_node(int);
const char *mdesc_name_by_idx(int);
#endif

#endif /* _MDESC_H_ */