source: vbox/trunk/src/VBox/Additions/x11/x11include/xorg-server-1.15.0/memrange.h@ 78293

/*
 * Memory range attribute operations, peformed on /dev/mem
 */

#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif

#ifndef _MEMRANGE_H
#define _MEMRANGE_H

/* 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

struct mem_range_softc;
struct mem_range_ops {
    void (*init) __P((struct mem_range_softc * sc));
    int (*set)
        __P((struct mem_range_softc * sc, struct mem_range_desc * mrd,
             int *arg));
    void (*initAP) __P((struct mem_range_softc * sc));
};

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 int mem_range_attr_get __P((struct mem_range_desc * mrd, int *arg));
extern int mem_range_attr_set __P((struct mem_range_desc * mrd, int *arg));
extern void mem_range_AP_init __P((void));
#endif

#endif