FreeBSD/Linux Kernel Cross Reference
sys/sys/memrange.h
1 /*
2 * Memory range attribute operations, peformed on /dev/mem
3 *
4 * $FreeBSD: releng/5.1/sys/sys/memrange.h 103346 2002-09-15 15:07:55Z dwmalone $
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
25 struct 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
33 struct 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
47 MALLOC_DECLARE(M_MEMDESC);
48
49 struct mem_range_softc;
50 struct 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 };
56
57 struct mem_range_softc
58 {
59 struct mem_range_ops *mr_op;
60 int mr_cap;
61 int mr_ndesc;
62 struct mem_range_desc *mr_desc;
63 };
64
65 extern struct mem_range_softc mem_range_softc;
66
67 extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
68 extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
69 extern void mem_range_AP_init(void);
70 #endif
71
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