Contributors: 16
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Paul Mackerras |
291 |
49.66% |
5 |
19.23% |
| Anton Blanchard |
151 |
25.77% |
4 |
15.38% |
| Benjamin Herrenschmidt |
38 |
6.48% |
2 |
7.69% |
| Aneesh Kumar K.V |
26 |
4.44% |
1 |
3.85% |
| Arnd Bergmann |
25 |
4.27% |
1 |
3.85% |
| Mathieu Malaterre |
8 |
1.37% |
1 |
3.85% |
| Nicholas Piggin |
7 |
1.19% |
1 |
3.85% |
| Josh Boyer |
7 |
1.19% |
1 |
3.85% |
| Kevin Hao |
7 |
1.19% |
2 |
7.69% |
| Tony Breeds |
7 |
1.19% |
1 |
3.85% |
| Bharat Bhushan |
5 |
0.85% |
1 |
3.85% |
| Oliver O'Halloran |
5 |
0.85% |
1 |
3.85% |
| Mahesh Salgaonkar |
4 |
0.68% |
1 |
3.85% |
| Christophe Leroy |
2 |
0.34% |
2 |
7.69% |
| Thomas Gleixner |
2 |
0.34% |
1 |
3.85% |
| Kim Phillips |
1 |
0.17% |
1 |
3.85% |
| Total |
586 |
|
26 |
|
/* 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>
/* time.c */
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 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;
};
/* Accessor functions for the timebase (RTC on 601) registers. */
#define __USE_RTC() (IS_ENABLED(CONFIG_PPC_BOOK3S_601))
#ifdef CONFIG_PPC64
/* For compatibility, get_tbl() is defined as get_tb() on ppc64 */
#define get_tbl get_tb
#else
static inline unsigned long get_tbl(void)
{
return mftbl();
}
static inline unsigned int get_tbu(void)
{
return mftbu();
}
#endif /* !CONFIG_PPC64 */
static inline unsigned int get_rtcl(void)
{
unsigned int rtcl;
asm volatile("mfrtcl %0" : "=r" (rtcl));
return rtcl;
}
static inline u64 get_rtc(void)
{
unsigned int hi, lo, hi2;
do {
asm volatile("mfrtcu %0; mfrtcl %1; mfrtcu %2"
: "=r" (hi), "=r" (lo), "=r" (hi2));
} while (hi2 != hi);
return (u64)hi * 1000000000 + lo;
}
static inline u64 get_vtb(void)
{
#ifdef CONFIG_PPC_BOOK3S_64
if (cpu_has_feature(CPU_FTR_ARCH_207S))
return mfspr(SPRN_VTB);
#endif
return 0;
}
#ifdef CONFIG_PPC64
static inline u64 get_tb(void)
{
return mftb();
}
#else /* CONFIG_PPC64 */
static inline u64 get_tb(void)
{
unsigned int tbhi, tblo, tbhi2;
do {
tbhi = get_tbu();
tblo = get_tbl();
tbhi2 = get_tbu();
} while (tbhi != tbhi2);
return ((u64)tbhi << 32) | tblo;
}
#endif /* !CONFIG_PPC64 */
static inline u64 get_tb_or_rtc(void)
{
return __USE_RTC() ? get_rtc() : get_tb();
}
static inline void set_tb(unsigned int upper, unsigned int lower)
{
mtspr(SPRN_TBWL, 0);
mtspr(SPRN_TBWU, upper);
mtspr(SPRN_TBWL, lower);
}
/* 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 defined(CONFIG_40x)
return (mfspr(SPRN_PIT));
#else
return (mfspr(SPRN_DEC));
#endif
}
/*
* 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 defined(CONFIG_40x)
mtspr(SPRN_PIT, (u32) val);
#else
#ifndef CONFIG_BOOKE
--val;
#endif
mtspr(SPRN_DEC, val);
#endif /* not 40x */
}
static inline unsigned long tb_ticks_since(unsigned long tstamp)
{
if (__USE_RTC()) {
int delta = get_rtcl() - (unsigned int) tstamp;
return delta < 0 ? delta + 1000000000 : delta;
}
return get_tbl() - 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);
/* Convert timebase ticks to nanoseconds */
unsigned long long tb_to_ns(unsigned long long tb_ticks);
/* SPLPAR */
void accumulate_stolen_time(void);
#endif /* __KERNEL__ */
#endif /* __POWERPC_TIME_H */