FreeBSD/Linux Kernel Cross Reference
sys/sys/memrange.h
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
28 struct 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
36 struct 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
50 MALLOC_DECLARE(M_MEMDESC);
51
52 struct mem_range_softc;
53 struct 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
61 struct 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
69 extern struct mem_range_softc mem_range_softc;
70
71 extern void mem_range_init(void);
72 extern void mem_range_destroy(void);
73
74 extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
75 extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
76
77 #endif /* _KERNEL */
78
79 #endif /* _SYS_MEMRANGE_H_ */
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