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 #ifndef _SYS_IOCCOM_H_
  16 #include <sys/ioccom.h>
  17 #endif
  18
  19 #ifdef _KERNEL
  20
  21 #ifndef _SYS_MALLOC_H_
  22 #include <sys/malloc.h>
  23 #endif
  24
  25 #endif
  26
  27 /* Memory range attributes */
  28 #define MDF_UNCACHEABLE         (1<<0)  /* region not cached */
  29 #define MDF_WRITECOMBINE        (1<<1)  /* region supports "write combine" action */
  30 #define MDF_WRITETHROUGH        (1<<2)  /* write-through cached */
  31 #define MDF_WRITEBACK           (1<<3)  /* write-back cached */
  32 #define MDF_WRITEPROTECT        (1<<4)  /* read-only region */
  33 #define MDF_UNKNOWN             (1<<5)  /* any state we don't understand */
  34 #define MDF_ATTRMASK            (0x00ffffff)
  35
  36 #define MDF_FIXBASE             (1<<24) /* fixed base */
  37 #define MDF_FIXLEN              (1<<25) /* fixed length */
  38 #define MDF_FIRMWARE            (1<<26) /* set by firmware (XXX not useful?) */
  39 #define MDF_ACTIVE              (1<<27) /* currently active */
  40 #define MDF_BOGUS               (1<<28) /* we don't like it */
  41 #define MDF_FIXACTIVE           (1<<29) /* can't be turned off */
  42 #define MDF_BUSY                (1<<30) /* range is in use */
  43 #define MDF_FORCE               (1<<31) /* force risky changes */
  44
  45 struct mem_range_desc
  46 {
  47         u_int64_t       mr_base;
  48         u_int64_t       mr_len;
  49         int             mr_flags;
  50         char            mr_owner[8];
  51 };
  52
  53 struct mem_range_op
  54 {
  55         struct mem_range_desc   *mo_desc;
  56         int                     mo_arg[2];
  57 #define MEMRANGE_SET_UPDATE     0
  58 #define MEMRANGE_SET_REMOVE     1
  59         /* XXX want a flag that says "set and undo when I exit" */
  60 };
  61
  62 #define MEMRANGE_GET    _IOWR('m', 50, struct mem_range_op)
  63 #define MEMRANGE_SET    _IOW('m', 51, struct mem_range_op)
  64
  65 #ifdef _KERNEL
  66
  67 MALLOC_DECLARE(M_MEMDESC);
  68
  69 struct mem_range_softc;
  70 struct mem_range_ops
  71 {
  72         void    (*init)(struct mem_range_softc *sc);
  73         int     (*set)(struct mem_range_softc *sc, struct mem_range_desc *mrd, int *arg);
  74         void    (*initAP)(struct mem_range_softc *sc);
  75         void    (*set_iopl)(struct mem_range_softc *sc);
  76         void    (*clr_iopl)(struct mem_range_softc *sc);
  77 };
  78
  79 struct mem_range_softc
  80 {
  81         struct mem_range_ops    *mr_op;
  82         int                     mr_cap;
  83         int                     mr_ndesc;
  84         struct mem_range_desc   *mr_desc;
  85 };
  86
  87 extern struct mem_range_softc mem_range_softc;
  88
  89 extern int mem_range_attr_get(struct mem_range_desc *mrd, int *arg);
  90 extern int mem_range_attr_set(struct mem_range_desc *mrd, int *arg);
  91 extern void mem_range_AP_init(void);
  92 extern int cpu_set_iopl(void);
  93 extern int cpu_clr_iopl(void);
  94 #endif
  95
  96 #endif