sys/sys/memrange.h

   1
   2 /*
   3  * Memory range attribute operations, peformed on /dev/mem
   4  *
   5  * $FreeBSD: src/sys/sys/memrange.h,v 1.4.2.2 2002/09/16 21:58:37 dwmalone Exp $
   6  */
   7
   8 #ifndef _SYS_MEMRANGE_H_
   9 #define _SYS_MEMRANGE_H_
  10
  11 #ifndef _SYS_TYPES_H_
  12 #include <sys/types.h>
  13 #endif
  14 #ifndef _SYS_IOCCOM_H_
  15 #include <sys/ioccom.h>
  16 #endif
  17
  18 /* Memory range attributes */
  19 #define MDF_UNCACHEABLE         (1<<0)  /* region not cached */
  20 #define MDF_WRITECOMBINE        (1<<1)  /* region supports "write combine" action */
  21 #define MDF_WRITETHROUGH        (1<<2)  /* write-through cached */
  22 #define MDF_WRITEBACK           (1<<3)  /* write-back cached */
  23 #define MDF_WRITEPROTECT        (1<<4)  /* read-only region */
  24 #define MDF_UNKNOWN             (1<<5)  /* any state we don't understand */
  25 #define MDF_ATTRMASK            (0x00ffffff)
  26
  27 #define MDF_FIXBASE             (1<<24) /* fixed base */
  28 #define MDF_FIXLEN              (1<<25) /* fixed length */
  29 #define MDF_FIRMWARE            (1<<26) /* set by firmware (XXX not useful?) */
  30 #define MDF_ACTIVE              (1<<27) /* currently active */
  31 #define MDF_BOGUS               (1<<28) /* we don't like it */
  32 #define MDF_FIXACTIVE           (1<<29) /* can't be turned off */
  33 #define MDF_BUSY                (1<<30) /* range is in use */
  34 #define MDF_FORCE               (1<<31) /* force risky changes */
  35
  36 struct mem_range_desc
  37 {
  38         u_int64_t       mr_base;
  39         u_int64_t       mr_len;
  40         int             mr_flags;
  41         char            mr_owner[8];
  42 };
  43
  44 struct mem_range_op
  45 {
  46         struct mem_range_desc   *mo_desc;
  47         int                     mo_arg[2];
  48 #define MEMRANGE_SET_UPDATE     0
  49 #define MEMRANGE_SET_REMOVE     1
  50         /* XXX want a flag that says "set and undo when I exit" */
  51 };
  52
  53 #define MEMRANGE_GET    _IOWR('m', 50, struct mem_range_op)
  54 #define MEMRANGE_SET    _IOW('m', 51, struct mem_range_op)
  55
  56 #ifdef _KERNEL
  57
  58 #ifdef MALLOC_DECLARE
  59 MALLOC_DECLARE(M_MEMDESC);
  60 #endif
  61
  62 struct mem_range_softc;
  63 struct mem_range_ops
  64 {
  65         void    (*init)(struct mem_range_softc *sc);
  66         int     (*set)(struct mem_range_softc *sc, struct mem_range_desc *mrd, int *arg);
  67         void    (*initAP)(struct mem_range_softc *sc);
  68         void    (*set_iopl)(struct mem_range_softc *sc);
  69         void    (*clr_iopl)(struct mem_range_softc *sc);
  70 };
  71
  72 struct mem_range_softc
  73 {
  74         struct mem_range_ops    *mr_op;
  75         int                     mr_cap;
  76         int                     mr_ndesc;
  77         struct mem_range_desc   *mr_desc;
  78 };
  79
  80 extern struct mem_range_softc mem_range_softc;
  81
  82 int mem_range_attr_get(struct mem_range_desc *, int *);
  83 int mem_range_attr_set(struct mem_range_desc *, int *);
  84 void mem_range_AP_init(void);
  85 int cpu_set_iopl(void);
  86 int cpu_clr_iopl(void);
  87 #endif
  88
  89 #endif  /* !_SYS_MEMRANGE_H_ */