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 "physravl.h"
  21
  22 struct phys_block {
  23 #if SANITYCHECKS
  24         u32_t                   seencount;
  25 #endif
  26         phys_bytes              phys;   /* physical memory */
  27         u8_t                    refcount;       /* Refcount of these pages */
  28 #define PBSH_COW        1
  29 #define PBSH_SMAP       2
  30         u8_t                    share_flag;     /* PBSH_COW or PBSH_SMAP */
  31
  32         /* first in list of phys_regions that reference this block */
  33         struct phys_region      *firstregion;
  34 };
  35
  36 typedef struct vir_region {
  37         vir_bytes       vaddr;  /* virtual address, offset from pagetable */
  38         vir_bytes       length; /* length in bytes */
  39         physr_avl       *phys;  /* avl tree of physical memory blocks */
  40         u16_t           flags;
  41         u32_t tag;              /* Opaque to mapping code. */
  42         struct vmproc *parent;  /* Process that owns this vir_region. */
  43
  44         /* AVL fields */
  45         struct vir_region *lower, *higher;
  46         int             factor;
  47 } region_t;
  48
  49 /* Mapping flags: */
  50 #define VR_WRITABLE     0x001   /* Process may write here. */
  51 #define VR_NOPF         0x002   /* May not generate page faults. */
  52 #define VR_PHYS64K      0x004   /* Physical memory must be 64k aligned. */
  53 #define VR_LOWER16MB    0x008
  54 #define VR_LOWER1MB     0x010
  55 #define VR_CONTIG       0x020   /* Must be physically contiguous. */
  56 #define VR_SHARED       0x040
  57 #define VR_UNINITIALIZED 0x080  /* Do not clear after allocation  */
  58
  59 /* Mapping type: */
  60 #define VR_ANON         0x100   /* Memory to be cleared and allocated */
  61 #define VR_DIRECT       0x200   /* Mapped, but not managed by VM */
  62
  63 /* Tag values: */
  64 #define VRT_NONE        0xBEEF0000
  65 #define VRT_HEAP        0xBEEF0001
  66 #define VRT_TEXT        0xBEEF0002
  67 #define VRT_STACK       0xBEEF0003
  68
  69 /* map_page_region flags */
  70 #define MF_PREALLOC     0x01
  71
  72 #endif
  73