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/*

 * 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();

                lpaca->xLpPaca.xSavedDecr = cur_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 */