You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
124 lines
3.1 KiB
124 lines
3.1 KiB
/*
|
|
* 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/config.h>
|
|
#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 tb_to_us;
|
|
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;
|
|
|
|
void generic_calibrate_decr(void);
|
|
void setup_default_decr(void);
|
|
|
|
/* Some sane defaults: 125 MHz timebase, 1GHz processor */
|
|
extern unsigned long ppc_proc_freq;
|
|
#define DEFAULT_PROC_FREQ (DEFAULT_TB_FREQ * 8)
|
|
extern unsigned long ppc_tb_freq;
|
|
#define DEFAULT_TB_FREQ 125000000UL
|
|
|
|
/*
|
|
* By putting all of this stuff into a single struct we
|
|
* reduce the number of cache lines touched by do_gettimeofday.
|
|
* Both by collecting all of the data in one cache line and
|
|
* by touching only one TOC entry
|
|
*/
|
|
struct gettimeofday_vars {
|
|
unsigned long tb_to_xs;
|
|
unsigned long stamp_xsec;
|
|
unsigned long tb_orig_stamp;
|
|
};
|
|
|
|
struct gettimeofday_struct {
|
|
unsigned long tb_ticks_per_sec;
|
|
struct gettimeofday_vars vars[2];
|
|
struct gettimeofday_vars * volatile varp;
|
|
unsigned var_idx;
|
|
unsigned tb_to_us;
|
|
};
|
|
|
|
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->lppaca.shared_proc) {
|
|
lpaca->lppaca.virtual_decr = 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 mulhwu(x,y) \
|
|
({unsigned z; asm ("mulhwu %0,%1,%2" : "=r" (z) : "r" (x), "r" (y)); z;})
|
|
#define mulhdu(x,y) \
|
|
({unsigned long z; asm ("mulhdu %0,%1,%2" : "=r" (z) : "r" (x), "r" (y)); z;})
|
|
|
|
|
|
unsigned mulhwu_scale_factor(unsigned, unsigned);
|
|
void div128_by_32( unsigned long dividend_high, unsigned long dividend_low,
|
|
unsigned divisor, struct div_result *dr );
|
|
|
|
/* Used to store Processor Utilization register (purr) values */
|
|
|
|
struct cpu_usage {
|
|
u64 current_tb; /* Holds the current purr register values */
|
|
};
|
|
|
|
DECLARE_PER_CPU(struct cpu_usage, cpu_usage_array);
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* __PPC64_TIME_H */
|
|
|