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 28struct 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 36struct 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 50MALLOC_DECLARE(M_MEMDESC); 51 52struct mem_range_softc; 53struct 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 61struct 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 69extern struct mem_range_softc mem_range_softc; 70 71extern void mem_range_init(void); 72extern void mem_range_destroy(void); 73 74extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg); 75extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg); 76 77#endif /* _KERNEL */ 78 79#endif /* _SYS_MEMRANGE_H_ */ 80