FreeBSD/Linux Kernel Cross Reference
sys/sys/memrange.h
1 /*
2 * Memory range attribute operations, peformed on /dev/mem
3 */
4
5 /* Memory range attributes */
6 #define MDF_UNCACHEABLE (1<<0) /* region not cached */
7 #define MDF_WRITECOMBINE (1<<1) /* region supports "write combine" action */
8 #define MDF_WRITETHROUGH (1<<2) /* write-through cached */
9 #define MDF_WRITEBACK (1<<3) /* write-back cached */
10 #define MDF_WRITEPROTECT (1<<4) /* read-only region */
11 #define MDF_ATTRMASK (0x00ffffff)
12
13 #define MDF_FIXBASE (1<<24) /* fixed base */
14 #define MDF_FIXLEN (1<<25) /* fixed length */
15 #define MDF_FIRMWARE (1<<26) /* set by firmware (XXX not useful?) */
16 #define MDF_ACTIVE (1<<27) /* currently active */
17 #define MDF_BOGUS (1<<28) /* we don't like it */
18 #define MDF_FIXACTIVE (1<<29) /* can't be turned off */
19 #define MDF_BUSY (1<<30) /* range is in use */
20
21 struct mem_range_desc
22 {
23 u_int64_t mr_base;
24 u_int64_t mr_len;
25 int mr_flags;
26 char mr_owner[8];
27 };
28
29 struct mem_range_op
30 {
31 struct mem_range_desc *mo_desc;
32 int mo_arg[2];
33 #define MEMRANGE_SET_UPDATE 0
34 #define MEMRANGE_SET_REMOVE 1
35 /* XXX want a flag that says "set and undo when I exit" */
36 };
37
38 #define MEMRANGE_GET _IOWR('m', 50, struct mem_range_op)
39 #define MEMRANGE_SET _IOW('m', 51, struct mem_range_op)
40
41 #ifdef KERNEL
42
43 MALLOC_DECLARE(M_MEMDESC);
44
45 struct mem_range_softc;
46 struct mem_range_ops
47 {
48 void (*init)(struct mem_range_softc *sc);
49 int (*set)(struct mem_range_softc *sc, struct mem_range_desc *mrd, int *arg);
50 void (*initAP)(struct mem_range_softc *sc);
51 };
52
53 struct mem_range_softc
54 {
55 struct mem_range_ops *mr_op;
56 int mr_cap;
57 int mr_ndesc;
58 struct mem_range_desc *mr_desc;
59 };
60
61 extern struct mem_range_softc mem_range_softc;
62
63 extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
64 extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
65 extern void mem_range_AP_init(void);
66 #endif
67
Cache object: 5d2e86f231f3627c6b0618321e75de76
|