#ifndef _SPARC64_MDESC_H
#define _SPARC64_MDESC_H

#include <linux/types.h>
#include <asm/prom.h>

struct mdesc_handle;

/* Machine description operations are to be surrounded by grab and
 * release calls.  The mdesc_handle returned from the grab is
 * the first argument to all of the operational calls that work
 * on mdescs.
 */
extern struct mdesc_handle *mdesc_grab(void);
extern void mdesc_release(struct mdesc_handle *);

#define MDESC_NODE_NULL		(~(u64)0)

extern u64 mdesc_node_by_name(struct mdesc_handle *handle,
			      u64 from_node, const char *name);
#define mdesc_for_each_node_by_name(__hdl, __node, __name) \
	for (__node = mdesc_node_by_name(__hdl, MDESC_NODE_NULL, __name); \
	     (__node) != MDESC_NODE_NULL; \
	     __node = mdesc_node_by_name(__hdl, __node, __name))

extern const void *mdesc_get_property(struct mdesc_handle *handle,
				      u64 node, const char *name, int *lenp);

#define MDESC_ARC_TYPE_FWD	"fwd"
#define MDESC_ARC_TYPE_BACK	"back"

extern u64 mdesc_next_arc(struct mdesc_handle *handle, u64 from,
			  const char *arc_type);
#define mdesc_for_each_arc(__arc, __hdl, __node, __type) \
	for (__arc = mdesc_next_arc(__hdl, __node, __type); \
	     (__arc) != MDESC_NODE_NULL; \
	     __arc = mdesc_next_arc(__hdl, __arc, __type))

extern u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc);

extern const char *mdesc_node_name(struct mdesc_handle *hp, u64 node);

extern void mdesc_update(void);

extern void sun4v_mdesc_init(void);

#endif