arch/mips/include/asm/timex.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1998, 1999, 2003 by Ralf Baechle
   7  */
   8 #ifndef _ASM_TIMEX_H
   9 #define _ASM_TIMEX_H
  10
  11 #ifdef __KERNEL__
  12
  13 #include <asm/mipsregs.h>
  14
  15 /*
  16  * This is the clock rate of the i8253 PIT.  A MIPS system may not have
  17  * a PIT by the symbol is used all over the kernel including some APIs.
  18  * So keeping it defined to the number for the PIT is the only sane thing
  19  * for now.
  20  */
  21 #define CLOCK_TICK_RATE 1193182
  22
  23 /*
  24  * Standard way to access the cycle counter.
  25  * Currently only used on SMP for scheduling.
  26  *
  27  * Only the low 32 bits are available as a continuously counting entity.
  28  * But this only means we'll force a reschedule every 8 seconds or so,
  29  * which isn't an evil thing.
  30  *
  31  * We know that all SMP capable CPUs have cycle counters.
  32  */
  33
  34 typedef unsigned int cycles_t;
  35
  36 static inline cycles_t get_cycles(void)
  37 {
  38         return 0;
  39 }
  40
  41 #endif /* __KERNEL__ */
  42
  43 #endif /*  _ASM_TIMEX_H */