2 * Memory range attribute operations, peformed on /dev/mem
4 * $FreeBSD: src/sys/sys/memrange.h,v 1.4.2.2 2002/09/16 21:58:37 dwmalone Exp $
5 * $DragonFly: src/sys/sys/memrange.h,v 1.2 2003/06/17 04:28:58 dillon Exp $
8 /* Memory range attributes */
9 #define MDF_UNCACHEABLE (1<<0) /* region not cached */
10 #define MDF_WRITECOMBINE (1<<1) /* region supports "write combine" action */
11 #define MDF_WRITETHROUGH (1<<2) /* write-through cached */
12 #define MDF_WRITEBACK (1<<3) /* write-back cached */
13 #define MDF_WRITEPROTECT (1<<4) /* read-only region */
14 #define MDF_UNKNOWN (1<<5) /* any state we don't understand */
15 #define MDF_ATTRMASK (0x00ffffff)
17 #define MDF_FIXBASE (1<<24) /* fixed base */
18 #define MDF_FIXLEN (1<<25) /* fixed length */
19 #define MDF_FIRMWARE (1<<26) /* set by firmware (XXX not useful?) */
20 #define MDF_ACTIVE (1<<27) /* currently active */
21 #define MDF_BOGUS (1<<28) /* we don't like it */
22 #define MDF_FIXACTIVE (1<<29) /* can't be turned off */
23 #define MDF_BUSY (1<<30) /* range is in use */
24 #define MDF_FORCE (1<<31) /* force risky changes */
36 struct mem_range_desc *mo_desc;
38 #define MEMRANGE_SET_UPDATE 0
39 #define MEMRANGE_SET_REMOVE 1
40 /* XXX want a flag that says "set and undo when I exit" */
43 #define MEMRANGE_GET _IOWR('m', 50, struct mem_range_op)
44 #define MEMRANGE_SET _IOW('m', 51, struct mem_range_op)
48 MALLOC_DECLARE(M_MEMDESC);
50 struct mem_range_softc;
53 void (*init)(struct mem_range_softc *sc);
54 int (*set)(struct mem_range_softc *sc, struct mem_range_desc *mrd, int *arg);
55 void (*initAP)(struct mem_range_softc *sc);
58 struct mem_range_softc
60 struct mem_range_ops *mr_op;
63 struct mem_range_desc *mr_desc;
66 extern struct mem_range_softc mem_range_softc;
68 extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
69 extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
70 extern void mem_range_AP_init(void);