Contributors: 16
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Anton Blanchard |
132 |
37.18% |
4 |
13.79% |
| Paul Mackerras |
57 |
16.06% |
4 |
13.79% |
| Nicholas Piggin |
44 |
12.39% |
5 |
17.24% |
| Christophe Leroy |
26 |
7.32% |
3 |
10.34% |
| Arnd Bergmann |
25 |
7.04% |
1 |
3.45% |
| Aneesh Kumar K.V |
21 |
5.92% |
1 |
3.45% |
| Mathieu Malaterre |
8 |
2.25% |
1 |
3.45% |
| Kevin Hao |
7 |
1.97% |
2 |
6.90% |
| Josh Boyer |
7 |
1.97% |
1 |
3.45% |
| Tony Breeds |
7 |
1.97% |
1 |
3.45% |
| Oliver O'Halloran |
5 |
1.41% |
1 |
3.45% |
| Bharat Bhushan |
5 |
1.41% |
1 |
3.45% |
| He Ying |
4 |
1.13% |
1 |
3.45% |
| Mahesh Salgaonkar |
4 |
1.13% |
1 |
3.45% |
| Thomas Gleixner |
2 |
0.56% |
1 |
3.45% |
| Kim Phillips |
1 |
0.28% |
1 |
3.45% |
| Total |
355 |
|
29 |
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* 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.
*/
#ifndef __POWERPC_TIME_H
#define __POWERPC_TIME_H
#ifdef __KERNEL__
#include <linux/types.h>
#include <linux/percpu.h>
#include <asm/processor.h>
#include <asm/cpu_has_feature.h>
#include <asm/vdso/timebase.h>
/* time.c */
extern u64 decrementer_max;
extern unsigned long tb_ticks_per_jiffy;
extern unsigned long tb_ticks_per_usec;
extern unsigned long tb_ticks_per_sec;
extern struct clock_event_device decrementer_clockevent;
extern u64 decrementer_max;
extern void generic_calibrate_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
extern bool tb_invalid;
struct div_result {
u64 result_high;
u64 result_low;
};
static inline u64 get_vtb(void)
{
if (cpu_has_feature(CPU_FTR_ARCH_207S))
return mfspr(SPRN_VTB);
return 0;
}
/* Accessor functions for the decrementer register.
* The 4xx doesn't even have a decrementer. I tried to use the
* generic timer interrupt code, which seems OK, with the 4xx PIT
* in auto-reload mode. The problem is PIT stops counting when it
* hits zero. If it would wrap, we could use it just like a decrementer.
*/
static inline u64 get_dec(void)
{
if (IS_ENABLED(CONFIG_40x))
return mfspr(SPRN_PIT);
return mfspr(SPRN_DEC);
}
/*
* Note: Book E and 4xx processors differ from other PowerPC processors
* in when the decrementer generates its interrupt: on the 1 to 0
* transition for Book E/4xx, but on the 0 to -1 transition for others.
*/
static inline void set_dec(u64 val)
{
if (IS_ENABLED(CONFIG_40x))
mtspr(SPRN_PIT, (u32)val);
else if (IS_ENABLED(CONFIG_BOOKE))
mtspr(SPRN_DEC, val);
else
mtspr(SPRN_DEC, val - 1);
}
static inline unsigned long tb_ticks_since(unsigned long tstamp)
{
return mftb() - tstamp;
}
#define mulhwu(x,y) \
({unsigned z; asm ("mulhwu %0,%1,%2" : "=r" (z) : "r" (x), "r" (y)); z;})
#ifdef CONFIG_PPC64
#define mulhdu(x,y) \
({unsigned long z; asm ("mulhdu %0,%1,%2" : "=r" (z) : "r" (x), "r" (y)); z;})
#else
extern u64 mulhdu(u64, u64);
#endif
extern void div128_by_32(u64 dividend_high, u64 dividend_low,
unsigned divisor, struct div_result *dr);
extern void secondary_cpu_time_init(void);
extern void __init time_init(void);
DECLARE_PER_CPU(u64, decrementers_next_tb);
static inline u64 timer_get_next_tb(void)
{
return __this_cpu_read(decrementers_next_tb);
}
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
void timer_rearm_host_dec(u64 now);
#endif
/* Convert timebase ticks to nanoseconds */
unsigned long long tb_to_ns(unsigned long long tb_ticks);
void timer_broadcast_interrupt(void);
/* SPLPAR */
void accumulate_stolen_time(void);
#endif /* __KERNEL__ */
#endif /* __POWERPC_TIME_H */