1/*
2 * Memory range attribute operations, performed on /dev/mem
3 *
4 * $FreeBSD$
5 */
6
7#ifndef _SYS_MEMRANGE_H_
8#define	_SYS_MEMRANGE_H_
9
10/* Memory range attributes */
11#define MDF_UNCACHEABLE		(1<<0)	/* region not cached */
12#define MDF_WRITECOMBINE	(1<<1)	/* region supports "write combine" action */
13#define MDF_WRITETHROUGH	(1<<2)	/* write-through cached */
14#define MDF_WRITEBACK		(1<<3)	/* write-back cached */
15#define MDF_WRITEPROTECT	(1<<4)	/* read-only region */
16#define MDF_UNKNOWN		(1<<5)	/* any state we don't understand */
17#define MDF_ATTRMASK		(0x00ffffff)
18
19#define MDF_FIXBASE		(1<<24)	/* fixed base */
20#define MDF_FIXLEN		(1<<25)	/* fixed length */
21#define MDF_FIRMWARE		(1<<26)	/* set by firmware (XXX not useful?) */
22#define MDF_ACTIVE		(1<<27)	/* currently active */
23#define MDF_BOGUS		(1<<28)	/* we don't like it */
24#define MDF_FIXACTIVE		(1<<29)	/* can't be turned off */
25#define MDF_BUSY		(1<<30)	/* range is in use */
26#define MDF_FORCE		(1<<31)	/* force risky changes */
27
28struct mem_range_desc
29{
30	u_int64_t	mr_base;
31	u_int64_t	mr_len;
32	int		mr_flags;
33	char		mr_owner[8];
34};
35
36struct mem_range_op
37{
38	struct mem_range_desc	*mo_desc;
39	int			mo_arg[2];
40#define MEMRANGE_SET_UPDATE	0
41#define MEMRANGE_SET_REMOVE	1
42	/* XXX want a flag that says "set and undo when I exit" */
43};
44
45#define MEMRANGE_GET	_IOWR('m', 50, struct mem_range_op)
46#define MEMRANGE_SET	_IOW('m', 51, struct mem_range_op)
47
48#ifdef _KERNEL
49
50MALLOC_DECLARE(M_MEMDESC);
51
52struct mem_range_softc;
53struct mem_range_ops
54{
55	void	(*init)(struct mem_range_softc *sc);
56	int	(*set)(struct mem_range_softc *sc, struct mem_range_desc *mrd, int *arg);
57    	void	(*initAP)(struct mem_range_softc *sc);
58    	void	(*reinit)(struct mem_range_softc *sc);
59};
60
61struct mem_range_softc
62{
63	struct mem_range_ops	*mr_op;
64	int			mr_cap;
65	int			mr_ndesc;
66	struct mem_range_desc 	*mr_desc;
67};
68
69extern struct mem_range_softc mem_range_softc;
70
71extern void	mem_range_init(void);
72extern void	mem_range_destroy(void);
73
74extern int	mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
75extern int	mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
76
77#endif /* _KERNEL */
78
79#endif /* _SYS_MEMRANGE_H_ */
80