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/keymap.h>
  12 #include <minix/minlib.h>
  13 #include <minix/type.h>
  14 #include <minix/ipc.h>
  15 #include <minix/sysutil.h>
  16 #include <minix/syslib.h>
  17 #include <minix/const.h>
  18
  19 #include "phys_region.h"
  20 #include "memtype.h"
  21 #include "vm.h"
  22
  23 struct phys_block {
  24 #if SANITYCHECKS
  25         u32_t                   seencount;
  26 #endif
  27         phys_bytes              phys;   /* physical memory */
  28         u8_t                    refcount;       /* Refcount of these pages */
  29
  30         /* what kind of memory is it? */
  31         mem_type_t              *memtype;
  32
  33         /* first in list of phys_regions that reference this block */
  34         struct phys_region      *firstregion;
  35 };
  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      *memtype; /* Default instantiated memory type. */
  44         int             remaps;
  45         u32_t           id;     /* unique id */
  46
  47         union {
  48                 phys_bytes phys;
  49                 struct {
  50                         endpoint_t ep;
  51                         vir_bytes vaddr;
  52                         int id;
  53                 } shared;
  54         } param;
  55
  56         /* AVL fields */
  57         struct vir_region *lower, *higher;
  58         int             factor;
  59 } region_t;
  60
  61 /* Mapping flags: */
  62 #define VR_WRITABLE     0x001   /* Process may write here. */
  63 #define VR_PHYS64K      0x004   /* Physical memory must be 64k aligned. */
  64 #define VR_LOWER16MB    0x008
  65 #define VR_LOWER1MB     0x010
  66 #define VR_CONTIG       0x020   /* Must be physically contiguous. */
  67 #define VR_SHARED       0x040
  68 #define VR_UNINITIALIZED 0x080  /* Do not clear after allocation  */
  69
  70 /* Mapping type: */
  71 #define VR_ANON         0x100   /* Memory to be cleared and allocated */
  72 #define VR_DIRECT       0x200   /* Mapped, but not managed by VM */
  73
  74 /* map_page_region flags */
  75 #define MF_PREALLOC     0x01
  76
  77 #endif
  78