include/minix/vboxtype.h

   1 #ifndef _MINIX_VBOXTYPE_H
   2 #define _MINIX_VBOXTYPE_H
   3
   4 /* This header declares the type definitions shared between VBOX driver, the
   5  * interface in libsys, and any caller of those interface functions.
   6  */
   7
   8 /* Call parameter type. */
   9 typedef enum {
  10   VBOX_TYPE_INVALID,            /* invalid type */
  11   VBOX_TYPE_U32,                /* 32-bit value */
  12   VBOX_TYPE_U64,                /* 64-bit value */
  13   VBOX_TYPE_PTR                 /* pointer to granted memory area */
  14 } vbox_type_t;
  15
  16 /* Call parameter transfer direction. */
  17 #define VBOX_DIR_IN     0x01    /* from host to guest */
  18 #define VBOX_DIR_OUT    0x02    /* from guest to host */
  19 #define VBOX_DIR_INOUT  (VBOX_DIR_IN | VBOX_DIR_OUT)
  20
  21 /* Call parameter. */
  22 typedef struct {
  23   vbox_type_t type;
  24   union {
  25         u32_t u32;
  26         u64_t u64;
  27         struct {
  28                 cp_grant_id_t grant;
  29                 size_t off;
  30                 size_t size;
  31                 unsigned int dir;
  32         } ptr;
  33   };
  34 } vbox_param_t;
  35
  36 #endif /*_MINIX_VBOXTYPE_H */