memrange.h revision 189903 
1/*
2 * Memory range attribute operations, peformed on /dev/mem
3 *
4 * $FreeBSD: head/sys/sys/memrange.h 189903 2009-03-17 00:48:11Z jkim $
5 */
6
7/* Memory range attributes */
8#define MDF_UNCACHEABLE		(1<<0)	/* region not cached */
9#define MDF_WRITECOMBINE	(1<<1)	/* region supports "write combine" action */
10#define MDF_WRITETHROUGH	(1<<2)	/* write-through cached */
11#define MDF_WRITEBACK		(1<<3)	/* write-back cached */
12#define MDF_WRITEPROTECT	(1<<4)	/* read-only region */
13#define MDF_UNKNOWN		(1<<5)	/* any state we don't understand */
14#define MDF_ATTRMASK		(0x00ffffff)
15
16#define MDF_FIXBASE		(1<<24)	/* fixed base */
17#define MDF_FIXLEN		(1<<25)	/* fixed length */
18#define MDF_FIRMWARE		(1<<26)	/* set by firmware (XXX not useful?) */
19#define MDF_ACTIVE		(1<<27)	/* currently active */
20#define MDF_BOGUS		(1<<28)	/* we don't like it */
21#define MDF_FIXACTIVE		(1<<29)	/* can't be turned off */
22#define MDF_BUSY		(1<<30)	/* range is in use */
23#define MDF_FORCE		(1<<31)	/* force risky changes */
24
25struct mem_range_desc
26{
27	u_int64_t	mr_base;
28	u_int64_t	mr_len;
29	int		mr_flags;
30	char		mr_owner[8];
31};
32
33struct mem_range_op
34{
35	struct mem_range_desc	*mo_desc;
36	int			mo_arg[2];
37#define MEMRANGE_SET_UPDATE	0
38#define MEMRANGE_SET_REMOVE	1
39	/* XXX want a flag that says "set and undo when I exit" */
40};
41
42#define MEMRANGE_GET	_IOWR('m', 50, struct mem_range_op)
43#define MEMRANGE_SET	_IOW('m', 51, struct mem_range_op)
44
45#ifdef _KERNEL
46
47MALLOC_DECLARE(M_MEMDESC);
48
49struct mem_range_softc;
50struct mem_range_ops
51{
52	void	(*init)(struct mem_range_softc *sc);
53	int	(*set)(struct mem_range_softc *sc, struct mem_range_desc *mrd, int *arg);
54    	void	(*initAP)(struct mem_range_softc *sc);
55    	void	(*reinit)(struct mem_range_softc *sc);
56};
57
58struct mem_range_softc
59{
60	struct mem_range_ops	*mr_op;
61	int			mr_cap;
62	int			mr_ndesc;
63	struct mem_range_desc 	*mr_desc;
64};
65
66extern struct mem_range_softc mem_range_softc;
67
68extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
69extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
70
71#endif
72