80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/*
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* Memory range attribute operations, performed on /dev/mem
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_MEMRANGE_H_
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#define _SYS_MEMRANGE_H_
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/* Memory range attributes */
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#define MDF_UNCACHEABLE (1<<0) /* region not cached */
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#define MDF_WRITECOMBINE (1<<1) /* region supports "write combine" action */
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#define MDF_WRITETHROUGH (1<<2) /* write-through cached */
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#define MDF_WRITEBACK (1<<3) /* write-back cached */
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#define MDF_WRITEPROTECT (1<<4) /* read-only region */
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#define MDF_UNKNOWN (1<<5) /* any state we don't understand */
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#define MDF_ATTRMASK (0x00ffffff)
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#define MDF_FIXBASE (1<<24) /* fixed base */
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#define MDF_FIXLEN (1<<25) /* fixed length */
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#define MDF_FIRMWARE (1<<26) /* set by firmware (XXX not useful?) */
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#define MDF_ACTIVE (1<<27) /* currently active */
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#define MDF_BOGUS (1<<28) /* we don't like it */
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#define MDF_FIXACTIVE (1<<29) /* can't be turned off */
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#define MDF_BUSY (1<<30) /* range is in use */
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#define MDF_FORCE (1<<31) /* force risky changes */
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struct mem_range_desc
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{
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u_int64_t mr_base;
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u_int64_t mr_len;
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int mr_flags;
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char mr_owner[8];
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};
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struct mem_range_op
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{
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struct mem_range_desc *mo_desc;
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int mo_arg[2];
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#define MEMRANGE_SET_UPDATE 0
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#define MEMRANGE_SET_REMOVE 1
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/* XXX want a flag that says "set and undo when I exit" */
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};
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#define MEMRANGE_GET _IOWR('m', 50, struct mem_range_op)
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#define MEMRANGE_SET _IOW('m', 51, struct mem_range_op)
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#ifdef _KERNEL
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MALLOC_DECLARE(M_MEMDESC);
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struct mem_range_softc;
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struct mem_range_ops
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{
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void (*init)(struct mem_range_softc *sc);
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int (*set)(struct mem_range_softc *sc, struct mem_range_desc *mrd, int *arg);
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void (*initAP)(struct mem_range_softc *sc);
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void (*reinit)(struct mem_range_softc *sc);
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};
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struct mem_range_softc
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{
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struct mem_range_ops *mr_op;
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int mr_cap;
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int mr_ndesc;
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struct mem_range_desc *mr_desc;
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};
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extern struct mem_range_softc mem_range_softc;
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extern void mem_range_init(void);
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extern void mem_range_destroy(void);
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extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
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extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
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#endif /* _KERNEL */
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#endif /* _SYS_MEMRANGE_H_ */
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