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Generic memory range attribute interface.

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This commit is contained in:
Mike Smith 1999-04-07 03:59:32 +00:00
parent facdaf9e33
commit f59734592a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=45408
1 changed files with 65 additions and 0 deletions
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65
sys/sys/memrange.h Normal file
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/*
* Memory range attribute operations, peformed on /dev/mem
*/
/* Memory range attributes */
#define MDF_UNCACHEABLE (1<<0) /* region not cached */
#define MDF_WRITECOMBINE (1<<1) /* region supports "write combine" action */
#define MDF_WRITETHROUGH (1<<2) /* write-through cached */
#define MDF_WRITEBACK (1<<3) /* write-back cached */
#define MDF_WRITEPROTECT (1<<4) /* read-only region */
#define MDF_ATTRMASK (0x00ffffff)
#define MDF_FIXBASE (1<<24) /* fixed base */
#define MDF_FIXLEN (1<<25) /* fixed length */
#define MDF_FIRMWARE (1<<26) /* set by firmware (XXX not useful?) */
#define MDF_ACTIVE (1<<27) /* currently active */
#define MDF_BOGUS (1<<28) /* we don't like it */
#define MDF_FIXACTIVE (1<<29) /* can't be turned off */
#define MDF_BUSY (1<<30) /* range is in use */
struct mem_range_desc
{
u_int64_t mr_base;
u_int64_t mr_len;
int mr_flags;
char mr_owner[8];
};
struct mem_range_op
{
struct mem_range_desc *mo_desc;
int mo_arg[2];
#define MEMRANGE_SET_UPDATE 0
#define MEMRANGE_SET_REMOVE 1
/* XXX want a flag that says "set and undo when I exit" */
};
#define MEMRANGE_GET _IOWR('m', 50, struct mem_range_op)
#define MEMRANGE_SET _IOW('m', 51, struct mem_range_op)
#ifdef KERNEL
MALLOC_DECLARE(M_MEMDESC);
struct mem_range_softc;
struct mem_range_ops
{
void (*init)(struct mem_range_softc *sc);
int (*set)(struct mem_range_softc *sc, struct mem_range_desc *mrd, int *arg);
};
struct mem_range_softc
{
struct mem_range_ops *mr_op;
int mr_cap;
int mr_ndesc;
struct mem_range_desc *mr_desc;
};
extern struct mem_range_softc mem_range_softc;
extern void mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
#endif