timex.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:1k
- /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1998, 1999 by Ralf Baechle
- *
- * FIXME: For some of the supported machines this is dead wrong.
- */
- #ifndef __ASM_MIPS_TIMEX_H
- #define __ASM_MIPS_TIMEX_H
- #define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
- #define CLOCK_TICK_FACTOR 20 /* Factor of both 1000000 and CLOCK_TICK_RATE */
- #define FINETUNE ((((((long)LATCH * HZ - CLOCK_TICK_RATE) << SHIFT_HZ) *
- (1000000/CLOCK_TICK_FACTOR) / (CLOCK_TICK_RATE/CLOCK_TICK_FACTOR))
- << (SHIFT_SCALE-SHIFT_HZ)) / HZ)
- #ifdef __KERNEL__
- /*
- * Standard way to access the cycle counter.
- * Currently only used on SMP for scheduling.
- *
- * Only the low 32 bits are available as a continuously counting entity.
- * But this only means we'll force a reschedule every 8 seconds or so,
- * which isn't an evil thing.
- *
- * We know that all SMP capable CPUs have cycle counters.
- */
- typedef unsigned int cycles_t;
- extern cycles_t cacheflush_time;
- static inline cycles_t get_cycles (void)
- {
- return read_32bit_cp0_register(CP0_COUNT);
- }
- #endif /* __KERNEL__ */
- #define vxtime_lock() do {} while (0)
- #define vxtime_unlock() do {} while (0)
- #endif /* __ASM_MIPS_TIMEX_H */