LXR linux/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
  34typedef unsigned int cycles_t;
  35
  36static inline cycles_t get_cycles(void)
  37{
  38        return 0;
  39}
  40
  41#endif /* __KERNEL__ */
  42
  43#endif /*  _ASM_TIMEX_H */
  44