1 /*
2  * Memory range attribute operations, peformed on /dev/mem
3  */
4 
5 #ifdef HAVE_XORG_CONFIG_H
6 #include <xorg-config.h>
7 #endif
8 
9 #ifndef _MEMRANGE_H
10 #define _MEMRANGE_H
11 
12 /* Memory range attributes */
13 #define MDF_UNCACHEABLE		(1<<0)  /* region not cached */
14 #define MDF_WRITECOMBINE	(1<<1)  /* region supports "write combine"
15                                          * action */
16 #define MDF_WRITETHROUGH	(1<<2)  /* write-through cached */
17 #define MDF_WRITEBACK		(1<<3)  /* write-back cached */
18 #define MDF_WRITEPROTECT	(1<<4)  /* read-only region */
19 #define MDF_ATTRMASK		(0x00ffffff)
20 
21 #define MDF_FIXBASE		(1<<24) /* fixed base */
22 #define MDF_FIXLEN		(1<<25) /* fixed length */
23 #define MDF_FIRMWARE		(1<<26) /* set by firmware (XXX not useful?) */
24 #define MDF_ACTIVE		(1<<27) /* currently active */
25 #define MDF_BOGUS		(1<<28) /* we don't like it */
26 #define MDF_FIXACTIVE		(1<<29) /* can't be turned off */
27 #define MDF_BUSY		(1<<30) /* range is in use */
28 
29 struct mem_range_desc {
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     struct mem_range_desc *mo_desc;
38     int mo_arg[2];
39 #define MEMRANGE_SET_UPDATE	0
40 #define MEMRANGE_SET_REMOVE	1
41     /* XXX want a flag that says "set and undo when I exit" */
42 };
43 
44 #define MEMRANGE_GET	_IOWR('m', 50, struct mem_range_op)
45 #define MEMRANGE_SET	_IOW('m', 51, struct mem_range_op)
46 
47 #ifdef _KERNEL
48 
49 struct mem_range_softc;
50 struct mem_range_ops {
51     void (*init) __P((struct mem_range_softc * sc));
52     int (*set)
53         __P((struct mem_range_softc * sc, struct mem_range_desc * mrd,
54              int *arg));
55     void (*initAP) __P((struct mem_range_softc * sc));
56 };
57 
58 struct mem_range_softc {
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 __P((struct mem_range_desc * mrd, int *arg));
68 extern int mem_range_attr_set __P((struct mem_range_desc * mrd, int *arg));
69 extern void mem_range_AP_init __P((void));
70 #endif
71 
72 #endif
73