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 "config.h"
   9 #include "debug.h"
  10
  11 /* Translate an endpoint number to a process number, return success. */
  12 #define isokendpt(e,p) isokendpt_d((e),(p),0)
  13 #define okendpt(e,p)   isokendpt_d((e),(p),1)
  14
  15 /* Constants used in virtual_copy(). Values must be 0 and 1, respectively. */
  16 #define _SRC_   0
  17 #define _DST_   1
  18
  19 #define get_sys_bit(map,bit) \
  20         ( MAP_CHUNK(map.chunk,bit) & (1 << CHUNK_OFFSET(bit) )
  21 #define get_sys_bits(map,bit) \
  22         ( MAP_CHUNK(map.chunk,bit) )
  23 #define set_sys_bit(map,bit) \
  24         ( MAP_CHUNK(map.chunk,bit) |= (1 << CHUNK_OFFSET(bit) )
  25 #define unset_sys_bit(map,bit) \
  26         ( MAP_CHUNK(map.chunk,bit) &= ~(1 << CHUNK_OFFSET(bit) )
  27
  28 #define reallock  do { int d; d = intr_disabled(); intr_disable(); locklevel++; if(d && locklevel == 1) { minix_panic("reallock while interrupts disabled first time", __LINE__); } } while(0)
  29
  30 #define realunlock   do { if(!intr_disabled()) { minix_panic("realunlock while interrupts enabled", __LINE__); } if(locklevel < 1) { minix_panic("realunlock while locklevel below 1", __LINE__); } locklevel--; if(locklevel == 0) { intr_enable(); } } while(0)
  31
  32 /* Disable/ enable hardware interrupts. The parameters of lock() and unlock()
  33  * are used when debugging is enabled. See debug.h for more information.
  34  */
  35 #define lock      reallock
  36 #define unlock    realunlock
  37
  38 #ifdef CONFIG_IDLE_TSC
  39 #define IDLE_STOP if(idle_active) { read_tsc_64(&idle_stop); idle_active = 0; }
  40 #else
  41 #define IDLE_STOP
  42 #endif
  43
  44 /* args to intr_init() */
  45 #define INTS_ORIG       0       /* restore interrupts */
  46 #define INTS_MINIX      1       /* initialize interrupts for minix */
  47
  48 /* for kputc() */
  49 #define END_OF_KMESS    0
  50
  51 #endif /* CONST_H */