minix/servers/vm/vm.h

   1
   2 #ifndef _VM_H
   3 #define _VM_H 1
   4
   5 #define _SYSTEM 1
   6
   7 /* Compile in asserts and custom sanity checks at all? */
   8 #define SANITYCHECKS    0
   9 #define CACHE_SANITY    0
  10 #define VMSTATS         0
  11
  12 /* VM behaviour */
  13 #define MEMPROTECT      0       /* Slab objects not mapped. Access with USE() */
  14 #define JUNKFREE        0       /* Fill freed pages with junk */
  15
  16 #include <sys/errno.h>
  17
  18 #include "sanitycheck.h"
  19 #include "region.h"
  20
  21 /* Memory flags to pt_allocmap() and alloc_mem(). */
  22 #define PAF_CLEAR       0x01    /* Clear physical memory. */
  23 #define PAF_CONTIG      0x02    /* Physically contiguous. */
  24 #define PAF_ALIGN64K    0x04    /* Aligned to 64k boundary. */
  25 #define PAF_LOWER16MB   0x08
  26 #define PAF_LOWER1MB    0x10
  27 #define PAF_ALIGN16K    0x40    /* Aligned to 16k boundary. */
  28
  29 #define MARK do { if(mark) { printf("%d\n", __LINE__); } } while(0)
  30
  31 /* special value for v in pt_allocmap */
  32 #define AM_AUTO         ((u32_t) -1)
  33
  34 /* How noisy are we supposed to be? */
  35 #define VERBOSE         0
  36 #define LU_DEBUG        0
  37
  38 /* Minimum stack region size - 64MB. */
  39 #define MINSTACKREGION  (64*1024*1024)
  40
  41 /* If so, this level: */
  42 #define SCL_NONE        0       /* No sanity checks - assert()s only. */
  43 #define SCL_TOP         1       /* Main loop and other high-level places. */
  44 #define SCL_FUNCTIONS   2       /* Function entry/exit. */
  45 #define SCL_DETAIL      3       /* Detailled steps. */
  46 #define SCL_MAX         3       /* Highest value. */
  47
  48 /* Type of page allocations. */
  49 #define VMP_SPARE       0
  50 #define VMP_PAGETABLE   1
  51 #define VMP_PAGEDIR     2
  52 #define VMP_SLAB        3
  53 #define VMP_CATEGORIES  4
  54
  55 /* Flags to pt_writemap(). */
  56 #define WMF_OVERWRITE           0x01    /* Caller knows map may overwrite. */
  57 #define WMF_WRITEFLAGSONLY      0x02    /* Copy physaddr and update flags. */
  58 #define WMF_FREE                0x04    /* Free pages overwritten. */
  59 #define WMF_VERIFY              0x08    /* Check pagetable contents. */
  60
  61 #define MAP_NONE        0xFFFFFFFE
  62 #define NO_MEM ((phys_clicks) MAP_NONE)  /* returned by alloc_mem() with mem is up */
  63
  64 /* And what is the highest addressable piece of memory? */
  65 #define VM_DATATOP      kernel_boot_info.user_end
  66
  67 #define VM_STACKTOP     kernel_boot_info.user_sp
  68
  69 /* Live update will work only with magic instrumentation. Live update requires
  70  * strict separation of regions within the process to succeed. Therefore,
  71  * apply this strict separation only if magic instrumentation is used.
  72  * Otherwise, do not place such limitations on processes.
  73  */
  74 #ifdef _MINIX_MAGIC
  75 #define VM_MMAPTOP      (VM_STACKTOP-DEFAULT_STACK_LIMIT)
  76 #define VM_MMAPBASE     (VM_MMAPTOP/2)
  77 #else
  78 #define VM_MMAPTOP      VM_DATATOP
  79 #define VM_MMAPBASE     VM_PAGE_SIZE
  80 #endif
  81
  82 extern char _end;
  83 #define VM_OWN_HEAPSTART ((vir_bytes) (&_end))
  84 #define VM_OWN_HEAPBASE   roundup(VM_OWN_HEAPSTART, VM_PAGE_SIZE)
  85 #define VM_OWN_MMAPBASE (VM_OWN_HEAPBASE+1024*1024*1024)
  86 #define VM_OWN_MMAPTOP   (VM_OWN_MMAPBASE+100 * 1024 * 1024)
  87
  88 #endif