
/*
 * Memory range attribute operations, peformed on /dev/mem
 *
 * $FreeBSD: src/sys/sys/memrange.h,v 1.4.2.2 2002/09/16 21:58:37 dwmalone Exp $
 */

#ifndef _SYS_MEMRANGE_H_
#define _SYS_MEMRANGE_H_

#ifndef _SYS_TYPES_H_
#include <sys/types.h>
#endif
#ifndef _SYS_IOCCOM_H_
#include <sys/ioccom.h>
#endif

/* Memory range attributes */
#define MDF_UNCACHEABLE		(1<<0)	/* region not cached */
#define MDF_WRITECOMBINE	(1<<1)	/* region supports "write combine" action */
#define MDF_WRITETHROUGH	(1<<2)	/* write-through cached */
#define MDF_WRITEBACK		(1<<3)	/* write-back cached */
#define MDF_WRITEPROTECT	(1<<4)	/* read-only region */
#define MDF_UNKNOWN		(1<<5)	/* any state we don't understand */
#define MDF_ATTRMASK		(0x00ffffff)

#define MDF_FIXBASE		(1<<24)	/* fixed base */
#define MDF_FIXLEN		(1<<25)	/* fixed length */
#define MDF_FIRMWARE		(1<<26)	/* set by firmware (XXX not useful?) */
#define MDF_ACTIVE		(1<<27)	/* currently active */
#define MDF_BOGUS		(1<<28)	/* we don't like it */
#define MDF_FIXACTIVE		(1<<29)	/* can't be turned off */
#define MDF_BUSY		(1<<30)	/* range is in use */
#define MDF_FORCE		(1<<31)	/* force risky changes */

struct mem_range_desc
{
	u_int64_t	mr_base;
	u_int64_t	mr_len;
	int		mr_flags;
	char		mr_owner[8];
};

struct mem_range_op
{
	struct mem_range_desc	*mo_desc;
	int			mo_arg[2];
#define MEMRANGE_SET_UPDATE	0
#define MEMRANGE_SET_REMOVE	1
	/* XXX want a flag that says "set and undo when I exit" */
};

#define MEMRANGE_GET	_IOWR('m', 50, struct mem_range_op)
#define MEMRANGE_SET	_IOW('m', 51, struct mem_range_op)

#ifdef _KERNEL

#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_MEMDESC);
#endif

struct mem_range_softc;
struct mem_range_ops
{
	void	(*init)(struct mem_range_softc *sc);
	int	(*set)(struct mem_range_softc *sc, struct mem_range_desc *mrd, int *arg);
	void	(*initAP)(struct mem_range_softc *sc);
	void	(*set_iopl)(struct mem_range_softc *sc);
	void	(*clr_iopl)(struct mem_range_softc *sc);
};

struct mem_range_softc
{
	struct mem_range_ops	*mr_op;
	int			mr_cap;
	int			mr_ndesc;
	struct mem_range_desc 	*mr_desc;
};

extern struct mem_range_softc mem_range_softc;

int mem_range_attr_get(struct mem_range_desc *, int *);
int mem_range_attr_set(struct mem_range_desc *, int *);
void mem_range_AP_init(void);
int cpu_set_iopl(void);
int cpu_clr_iopl(void);
#endif

#endif	/* !_SYS_MEMRANGE_H_ */
