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https://git.FreeBSD.org/src.git
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664a31e496
is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come.
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/*
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* Memory range attribute operations, peformed on /dev/mem
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*
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* $FreeBSD$
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*/
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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_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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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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};
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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 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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extern void mem_range_AP_init(void);
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#endif
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