time.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:2k
- /*
- * Common time prototypes and such for all ppc machines.
- *
- * Written by Cort Dougan (cort@cs.nmt.edu) to merge
- * Paul Mackerras' version and mine for PReP and Pmac.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #ifndef __PPC64_TIME_H
- #define __PPC64_TIME_H
- #ifdef __KERNEL__
- #include <linux/types.h>
- #include <linux/mc146818rtc.h>
- #include <asm/processor.h>
- #include <asm/paca.h>
- #include <asm/iSeries/HvCall.h>
- /* time.c */
- extern unsigned long tb_ticks_per_jiffy;
- extern unsigned long tb_ticks_per_usec;
- extern unsigned long tb_ticks_per_sec;
- extern unsigned long tb_to_xs;
- extern unsigned long tb_last_stamp;
- struct rtc_time;
- extern void to_tm(int tim, struct rtc_time * tm);
- extern time_t last_rtc_update;
- struct div_result {
- unsigned long result_high;
- unsigned long result_low;
- };
- int via_calibrate_decr(void);
- static __inline__ unsigned long get_tb(void)
- {
- return mftb();
- }
- /* Accessor functions for the decrementer register. */
- static __inline__ unsigned int get_dec(void)
- {
- return (mfspr(SPRN_DEC));
- }
- static __inline__ void set_dec(int val)
- {
- #ifdef CONFIG_PPC_ISERIES
- struct paca_struct *lpaca = get_paca();
- int cur_dec;
- if (lpaca->xLpPaca.xSharedProc) {
- lpaca->xLpPaca.xVirtualDecr = val;
- cur_dec = get_dec();
- if (cur_dec > val)
- HvCall_setVirtualDecr();
- } else
- #endif
- mtspr(SPRN_DEC, val);
- }
- static inline unsigned long tb_ticks_since(unsigned long tstamp)
- {
- return get_tb() - tstamp;
- }
- #define mulhdu(x,y)
- ({unsigned long z; asm ("mulhdu %0,%1,%2" : "=r" (z) : "r" (x), "r" (y)); z;})
- void div128_by_32( unsigned long dividend_high, unsigned long dividend_low,
- unsigned divisor, struct div_result *dr );
- #endif /* __KERNEL__ */
- #endif /* __PPC64_TIME_H */