minix/kernel/const.h

   1 /* General macros and constants used by the kernel. */
   2 #ifndef CONST_H
   3 #define CONST_H
   4
   5 #include <minix/config.h>
   6 #include <minix/bitmap.h>
   7
   8 #include "debug.h"
   9
  10 /* Translate an endpoint number to a process number, return success. */
  11 #ifndef isokendpt
  12 #define isokendpt(e,p) isokendpt_d((e),(p),0)
  13 #define okendpt(e,p)   isokendpt_d((e),(p),1)
  14 #endif
  15
  16 /* Constants used in virtual_copy(). Values must be 0 and 1, respectively. */
  17 #define _SRC_   0
  18 #define _DST_   1
  19
  20 #define get_sys_bit(map,bit) \
  21         ( MAP_CHUNK((map).chunk,bit) & (1 << CHUNK_OFFSET(bit) ))
  22 #define get_sys_bits(map,bit) \
  23         ( MAP_CHUNK((map).chunk,bit) )
  24 #define set_sys_bit(map,bit) \
  25         ( MAP_CHUNK((map).chunk,bit) |= (1 << CHUNK_OFFSET(bit) ))
  26 #define unset_sys_bit(map,bit) \
  27         ( MAP_CHUNK((map).chunk,bit) &= ~(1 << CHUNK_OFFSET(bit) ))
  28
  29 /* for kputc() */
  30 #define END_OF_KMESS    0
  31
  32 /* User limits. */
  33 #ifndef USR_DATATOP
  34 #ifndef _MINIX_MAGIC
  35 #define USR_DATATOP 0xF0000000
  36 #else
  37 #define USR_DATATOP 0xE0000000  /* TODO: is this necessary? */
  38 #endif
  39 #endif
  40
  41 #ifndef USR_STACKTOP
  42 #define USR_STACKTOP USR_DATATOP
  43 #endif
  44
  45 #ifndef USR_DATATOP_COMPACT
  46 #define USR_DATATOP_COMPACT USR_DATATOP
  47 #endif
  48
  49 #ifndef USR_STACKTOP_COMPACT
  50 #define USR_STACKTOP_COMPACT 0x50000000
  51 #endif
  52
  53 #endif /* CONST_H */