3 * Memory range attribute operations, peformed on /dev/mem
5 * $FreeBSD: src/sys/sys/memrange.h,v 1.4.2.2 2002/09/16 21:58:37 dwmalone Exp $
6 * $DragonFly: src/sys/sys/memrange.h,v 1.4 2006/12/17 20:07:33 dillon Exp $
9 #ifndef _SYS_MEMRANGE_H_
10 #define _SYS_MEMRANGE_H_
13 #include <sys/types.h>
18 #ifndef _SYS_MALLOC_H_
19 #include <sys/malloc.h>
24 /* Memory range attributes */
25 #define MDF_UNCACHEABLE (1<<0) /* region not cached */
26 #define MDF_WRITECOMBINE (1<<1) /* region supports "write combine" action */
27 #define MDF_WRITETHROUGH (1<<2) /* write-through cached */
28 #define MDF_WRITEBACK (1<<3) /* write-back cached */
29 #define MDF_WRITEPROTECT (1<<4) /* read-only region */
30 #define MDF_UNKNOWN (1<<5) /* any state we don't understand */
31 #define MDF_ATTRMASK (0x00ffffff)
33 #define MDF_FIXBASE (1<<24) /* fixed base */
34 #define MDF_FIXLEN (1<<25) /* fixed length */
35 #define MDF_FIRMWARE (1<<26) /* set by firmware (XXX not useful?) */
36 #define MDF_ACTIVE (1<<27) /* currently active */
37 #define MDF_BOGUS (1<<28) /* we don't like it */
38 #define MDF_FIXACTIVE (1<<29) /* can't be turned off */
39 #define MDF_BUSY (1<<30) /* range is in use */
40 #define MDF_FORCE (1<<31) /* force risky changes */
52 struct mem_range_desc
*mo_desc
;
54 #define MEMRANGE_SET_UPDATE 0
55 #define MEMRANGE_SET_REMOVE 1
56 /* XXX want a flag that says "set and undo when I exit" */
59 #define MEMRANGE_GET _IOWR('m', 50, struct mem_range_op)
60 #define MEMRANGE_SET _IOW('m', 51, struct mem_range_op)
64 MALLOC_DECLARE(M_MEMDESC
);
66 struct mem_range_softc
;
69 void (*init
)(struct mem_range_softc
*sc
);
70 int (*set
)(struct mem_range_softc
*sc
, struct mem_range_desc
*mrd
, int *arg
);
71 void (*initAP
)(struct mem_range_softc
*sc
);
72 void (*set_iopl
)(struct mem_range_softc
*sc
);
73 void (*clr_iopl
)(struct mem_range_softc
*sc
);
76 struct mem_range_softc
78 struct mem_range_ops
*mr_op
;
81 struct mem_range_desc
*mr_desc
;
84 extern struct mem_range_softc mem_range_softc
;
86 extern int mem_range_attr_get(struct mem_range_desc
*mrd
, int *arg
);
87 extern int mem_range_attr_set(struct mem_range_desc
*mrd
, int *arg
);
88 extern void mem_range_AP_init(void);
89 extern int cpu_set_iopl(void);
90 extern int cpu_clr_iopl(void);