1/*
2 * Memory range attribute operations, performed 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
44#define MEMRANGE_GET	_IOWR('m', 50, struct mem_range_op)
45#define MEMRANGE_SET	_IOW('m', 51, struct mem_range_op)
46
47#ifdef _KERNEL
48
49struct mem_range_softc;
50struct mem_range_ops {
51    void (*init) __P((struct mem_range_softc * sc));
52    int (*set)
53        __P((struct mem_range_softc * sc, struct mem_range_desc * mrd,
54             int *arg));
55    void (*initAP) __P((struct mem_range_softc * sc));
56};
57
58struct mem_range_softc {
59    struct mem_range_ops *mr_op;
60    int mr_cap;
61    int mr_ndesc;
62    struct mem_range_desc *mr_desc;
63};
64
65extern struct mem_range_softc mem_range_softc;
66
67extern int mem_range_attr_get __P((struct mem_range_desc * mrd, int *arg));
68extern int mem_range_attr_set __P((struct mem_range_desc * mrd, int *arg));
69extern void mem_range_AP_init __P((void));
70#endif
71
72#endif
73