1 /* 2 * Memory range attribute operations, performed on /dev/mem 3 * 4 * $FreeBSD$ 5 */ 6 7 #ifndef _SYS_MEMRANGE_H_ 8 #define _SYS_MEMRANGE_H_ 9 10 /* Memory range attributes */ 11 #define MDF_UNCACHEABLE (1<<0) /* region not cached */ 12 #define MDF_WRITECOMBINE (1<<1) /* region supports "write combine" action */ 13 #define MDF_WRITETHROUGH (1<<2) /* write-through cached */ 14 #define MDF_WRITEBACK (1<<3) /* write-back cached */ 15 #define MDF_WRITEPROTECT (1<<4) /* read-only region */ 16 #define MDF_UNKNOWN (1<<5) /* any state we don't understand */ 17 #define MDF_ATTRMASK (0x00ffffff) 18 19 #define MDF_FIXBASE (1<<24) /* fixed base */ 20 #define MDF_FIXLEN (1<<25) /* fixed length */ 21 #define MDF_FIRMWARE (1<<26) /* set by firmware (XXX not useful?) */ 22 #define MDF_ACTIVE (1<<27) /* currently active */ 23 #define MDF_BOGUS (1<<28) /* we don't like it */ 24 #define MDF_FIXACTIVE (1<<29) /* can't be turned off */ 25 #define MDF_BUSY (1<<30) /* range is in use */ 26 #define MDF_FORCE (1<<31) /* force risky changes */ 27 28 struct mem_range_desc 29 { 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 { 38 struct mem_range_desc *mo_desc; 39 int mo_arg[2]; 40 #define MEMRANGE_SET_UPDATE 0 41 #define MEMRANGE_SET_REMOVE 1 42 /* XXX want a flag that says "set and undo when I exit" */ 43 }; 44 45 #define MEMRANGE_GET _IOWR('m', 50, struct mem_range_op) 46 #define MEMRANGE_SET _IOW('m', 51, struct mem_range_op) 47 48 #ifdef _KERNEL 49 50 MALLOC_DECLARE(M_MEMDESC); 51 52 struct mem_range_softc; 53 struct mem_range_ops 54 { 55 void (*init)(struct mem_range_softc *sc); 56 int (*set)(struct mem_range_softc *sc, struct mem_range_desc *mrd, int *arg); 57 void (*initAP)(struct mem_range_softc *sc); 58 void (*reinit)(struct mem_range_softc *sc); 59 }; 60 61 struct mem_range_softc 62 { 63 struct mem_range_ops *mr_op; 64 int mr_cap; 65 int mr_ndesc; 66 struct mem_range_desc *mr_desc; 67 }; 68 69 extern struct mem_range_softc mem_range_softc; 70 71 extern void mem_range_init(void); 72 extern void mem_range_destroy(void); 73 74 extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg); 75 extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg); 76 77 #endif /* _KERNEL */ 78 79 #endif /* _SYS_MEMRANGE_H_ */ 80