minix/servers/vm/region.h

   1
   2 #ifndef _REGION_H
   3 #define _REGION_H 1
   4
   5 #include <minix/callnr.h>
   6 #include <minix/com.h>
   7 #include <minix/config.h>
   8 #include <minix/const.h>
   9 #include <minix/ds.h>
  10 #include <minix/endpoint.h>
  11 #include <minix/minlib.h>
  12 #include <minix/type.h>
  13 #include <minix/ipc.h>
  14 #include <minix/sysutil.h>
  15 #include <minix/syslib.h>
  16 #include <minix/const.h>
  17
  18 #include "phys_region.h"
  19 #include "memtype.h"
  20 #include "vm.h"
  21 #include "fdref.h"
  22
  23 struct phys_block {
  24 #if SANITYCHECKS
  25         u32_t                   seencount;
  26 #endif
  27         phys_bytes              phys;   /* physical memory */
  28
  29         /* first in list of phys_regions that reference this block */
  30         struct phys_region      *firstregion;
  31         u8_t                    refcount;       /* Refcount of these pages */
  32         u8_t                    flags;
  33 };
  34
  35 #define PBF_INCACHE             0x01
  36
  37 typedef struct vir_region {
  38         vir_bytes       vaddr;  /* virtual address, offset from pagetable */
  39         vir_bytes       length; /* length in bytes */
  40         struct phys_region      **physblocks;
  41         u16_t           flags;
  42         struct vmproc *parent;  /* Process that owns this vir_region. */
  43         mem_type_t      *def_memtype; /* Default instantiated memory type. */
  44         int             remaps;
  45         int             id;     /* unique id */
  46
  47         union {
  48                 phys_bytes phys;        /* VR_DIRECT */
  49                 struct {
  50                         endpoint_t ep;
  51                         vir_bytes vaddr;
  52                         int id;
  53                 } shared;
  54                 struct phys_block *pb_cache;
  55                 struct {
  56                         int     inited;
  57                         struct fdref    *fdref;
  58                         u64_t   offset;
  59                         u16_t   clearend;
  60                 } file;
  61         } param;
  62
  63         /* AVL fields */
  64         struct vir_region *lower, *higher;
  65         int             factor;
  66 } region_t;
  67
  68 /* Mapping flags: */
  69 #define VR_WRITABLE     0x001   /* Process may write here. */
  70 #define VR_PHYS64K      0x004   /* Physical memory must be 64k aligned. */
  71 #define VR_LOWER16MB    0x008
  72 #define VR_LOWER1MB     0x010
  73 #define VR_SHARED       0x040
  74 #define VR_UNINITIALIZED 0x080  /* Do not clear after allocation  */
  75
  76 /* Mapping type: */
  77 #define VR_ANON         0x100   /* Memory to be cleared and allocated */
  78 #define VR_DIRECT       0x200   /* Mapped, but not managed by VM */
  79 #define VR_PREALLOC_MAP 0x400   /* Preallocated map. */
  80
  81 /* map_page_region_flags */
  82 #define MF_PREALLOC    0x01
  83
  84 #endif
  85