1/*
2 * Memory range attribute operations, peformed on /dev/mem
3 */
4
5#ifdef HAVE_XORG_CONFIG_H
6#include <xorg-config.h>
7#endif
8
9#ifndef _MEMRANGE_H
10#define _MEMRANGE_H
11
12/* Memory range attributes */
13#define MDF_UNCACHEABLE		(1<<0)	/* region not cached */
14#define MDF_WRITECOMBINE	(1<<1)	/* region supports "write combine"
15					 * action */
16#define MDF_WRITETHROUGH	(1<<2)	/* write-through cached */
17#define MDF_WRITEBACK		(1<<3)	/* write-back cached */
18#define MDF_WRITEPROTECT	(1<<4)	/* read-only region */
19#define MDF_ATTRMASK		(0x00ffffff)
20
21#define MDF_FIXBASE		(1<<24)	/* fixed base */
22#define MDF_FIXLEN		(1<<25)	/* fixed length */
23#define MDF_FIRMWARE		(1<<26)	/* set by firmware (XXX not useful?) */
24#define MDF_ACTIVE		(1<<27)	/* currently active */
25#define MDF_BOGUS		(1<<28)	/* we don't like it */
26#define MDF_FIXACTIVE		(1<<29)	/* can't be turned off */
27#define MDF_BUSY		(1<<30)	/* range is in use */
28
29struct mem_range_desc {
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	struct mem_range_desc *mo_desc;
38	int     mo_arg[2];
39#define MEMRANGE_SET_UPDATE	0
40#define MEMRANGE_SET_REMOVE	1
41	/* XXX want a flag that says "set and undo when I exit" */
42};
43#define MEMRANGE_GET	_IOWR('m', 50, struct mem_range_op)
44#define MEMRANGE_SET	_IOW('m', 51, struct mem_range_op)
45
46#ifdef _KERNEL
47
48struct mem_range_softc;
49struct mem_range_ops {
50	void    (*init) __P((struct mem_range_softc * sc));
51	int     (*set) __P((struct mem_range_softc * sc, struct mem_range_desc * mrd, int *arg));
52	void    (*initAP) __P((struct mem_range_softc * sc));
53};
54
55struct mem_range_softc {
56	struct mem_range_ops *mr_op;
57	int     mr_cap;
58	int     mr_ndesc;
59	struct mem_range_desc *mr_desc;
60};
61
62extern struct mem_range_softc mem_range_softc;
63
64extern int mem_range_attr_get __P((struct mem_range_desc * mrd, int *arg));
65extern int mem_range_attr_set __P((struct mem_range_desc * mrd, int *arg));
66extern void mem_range_AP_init __P((void));
67#endif
68
69#endif
70