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  * $DragonFly: src/sys/sys/memrange.h,v 1.4 2006/12/17 20:07:33 dillon Exp $
   7  */
   8
   9 #ifndef _SYS_MEMRANGE_H_
  10 #define _SYS_MEMRANGE_H_
  11
  12 #ifndef _SYS_TYPES_H_
  13 #include <sys/types.h>
  14 #endif
  15
  16 #ifdef _KERNEL
  17
  18 #ifndef _SYS_MALLOC_H_
  19 #include <sys/malloc.h>
  20 #endif
  21
  22 #endif
  23
  24 /* Memory range attributes */
  25 #define MDF_UNCACHEABLE         (1<<0)  /* region not cached */
  26 #define MDF_WRITECOMBINE        (1<<1)  /* region supports "write combine" action */
  27 #define MDF_WRITETHROUGH        (1<<2)  /* write-through cached */
  28 #define MDF_WRITEBACK           (1<<3)  /* write-back cached */
  29 #define MDF_WRITEPROTECT        (1<<4)  /* read-only region */
  30 #define MDF_UNKNOWN             (1<<5)  /* any state we don't understand */
  31 #define MDF_ATTRMASK            (0x00ffffff)
  32
  33 #define MDF_FIXBASE             (1<<24) /* fixed base */
  34 #define MDF_FIXLEN              (1<<25) /* fixed length */
  35 #define MDF_FIRMWARE            (1<<26) /* set by firmware (XXX not useful?) */
  36 #define MDF_ACTIVE              (1<<27) /* currently active */
  37 #define MDF_BOGUS               (1<<28) /* we don't like it */
  38 #define MDF_FIXACTIVE           (1<<29) /* can't be turned off */
  39 #define MDF_BUSY                (1<<30) /* range is in use */
  40 #define MDF_FORCE               (1<<31) /* force risky changes */
  41
  42 struct mem_range_desc
  43 {
  44         u_int64_t       mr_base;
  45         u_int64_t       mr_len;
  46         int             mr_flags;
  47         char            mr_owner[8];
  48 };
  49
  50 struct mem_range_op
  51 {
  52         struct mem_range_desc   *mo_desc;
  53         int                     mo_arg[2];
  54 #define MEMRANGE_SET_UPDATE     0
  55 #define MEMRANGE_SET_REMOVE     1
  56         /* XXX want a flag that says "set and undo when I exit" */
  57 };
  58
  59 #define MEMRANGE_GET    _IOWR('m', 50, struct mem_range_op)
  60 #define MEMRANGE_SET    _IOW('m', 51, struct mem_range_op)
  61
  62 #ifdef _KERNEL
  63
  64 MALLOC_DECLARE(M_MEMDESC);
  65
  66 struct mem_range_softc;
  67 struct mem_range_ops
  68 {
  69         void    (*init)(struct mem_range_softc *sc);
  70         int     (*set)(struct mem_range_softc *sc, struct mem_range_desc *mrd, int *arg);
  71         void    (*initAP)(struct mem_range_softc *sc);
  72         void    (*set_iopl)(struct mem_range_softc *sc);
  73         void    (*clr_iopl)(struct mem_range_softc *sc);
  74 };
  75
  76 struct mem_range_softc
  77 {
  78         struct mem_range_ops    *mr_op;
  79         int                     mr_cap;
  80         int                     mr_ndesc;
  81         struct mem_range_desc   *mr_desc;
  82 };
  83
  84 extern struct mem_range_softc mem_range_softc;
  85
  86 extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
  87 extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
  88 extern void mem_range_AP_init(void);
  89 extern int cpu_set_iopl(void);
  90 extern int cpu_clr_iopl(void);
  91 #endif
  92
  93 #endif