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riscv timer: cleanup

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- Prune unused definitions and includes
- Slight renaming of callback functions to indicate their usage
- Place vdso_fill_timehands callback logically in the file
- Small style nits

MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D35460
This commit is contained in:
Mitchell Horne 2022-06-21 13:22:40 -03:00
parent 8701571df9
commit 715276a08b
1 changed files with 20 additions and 38 deletions
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58
sys/riscv/riscv/timer.c
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@ -46,52 +46,35 @@ __FBSDID("$FreeBSD$");
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/rman.h>
#include <sys/timeet.h>
#include <sys/timetc.h>
#include <sys/vdso.h>
#include <sys/watchdog.h>
#include <sys/proc.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/cpufunc.h>
#include <machine/intr.h>
#include <machine/asm.h>
#include <machine/trap.h>
#include <machine/sbi.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/openfirm.h>
#define TIMER_COUNTS 0x00
#define TIMER_MTIMECMP(cpu) (cpu * 8)
struct riscv_timer_softc {
void *ih;
uint32_t clkfreq;
struct eventtimer et;
};
static struct riscv_timer_softc *riscv_timer_sc = NULL;
static uint32_t riscv_timer_fill_vdso_timehands(struct vdso_timehands *vdso_th,
struct timecounter *tc);
static timecounter_get_t riscv_timer_get_timecount;
static timecounter_get_t riscv_timer_tc_get_timecount;
static timecounter_fill_vdso_timehands_t riscv_timer_tc_fill_vdso_timehands;
static struct timecounter riscv_timer_timecount = {
.tc_name = "RISC-V Timecounter",
.tc_get_timecount = riscv_timer_get_timecount,
.tc_get_timecount = riscv_timer_tc_get_timecount,
.tc_poll_pps = NULL,
.tc_counter_mask = ~0u,
.tc_frequency = 0,
.tc_quality = 1000,
.tc_fill_vdso_timehands = riscv_timer_fill_vdso_timehands,
.tc_fill_vdso_timehands = riscv_timer_tc_fill_vdso_timehands,
};
static inline uint64_t
@ -111,8 +94,8 @@ get_counts(struct riscv_timer_softc *sc)
return (counts);
}
static unsigned
riscv_timer_get_timecount(struct timecounter *tc)
static u_int
riscv_timer_tc_get_timecount(struct timecounter *tc)
{
struct riscv_timer_softc *sc;
@ -121,8 +104,17 @@ riscv_timer_get_timecount(struct timecounter *tc)
return (get_counts(sc));
}
static uint32_t
riscv_timer_tc_fill_vdso_timehands(struct vdso_timehands *vdso_th,
struct timecounter *tc)
{
vdso_th->th_algo = VDSO_TH_ALGO_RISCV_RDTIME;
bzero(vdso_th->th_res, sizeof(vdso_th->th_res));
return (1);
}
static int
riscv_timer_start(struct eventtimer *et, sbintime_t first, sbintime_t period)
riscv_timer_et_start(struct eventtimer *et, sbintime_t first, sbintime_t period)
{
uint64_t counts;
@ -135,11 +127,10 @@ riscv_timer_start(struct eventtimer *et, sbintime_t first, sbintime_t period)
}
return (EINVAL);
}
static int
riscv_timer_stop(struct eventtimer *et)
riscv_timer_et_stop(struct eventtimer *et)
{
/* TODO */
@ -204,7 +195,7 @@ riscv_timer_attach(device_t dev)
int error;
sc = device_get_softc(dev);
if (riscv_timer_sc)
if (riscv_timer_sc != NULL)
return (ENXIO);
if (device_get_unit(dev) != 0)
@ -236,8 +227,8 @@ riscv_timer_attach(device_t dev)
sc->et.et_frequency = sc->clkfreq;
sc->et.et_min_period = (0x00000002LLU << 32) / sc->et.et_frequency;
sc->et.et_max_period = (0xfffffffeLLU << 32) / sc->et.et_frequency;
sc->et.et_start = riscv_timer_start;
sc->et.et_stop = riscv_timer_stop;
sc->et.et_start = riscv_timer_et_start;
sc->et.et_stop = riscv_timer_et_stop;
sc->et.et_priv = sc;
et_register(&sc->et);
@ -304,12 +295,3 @@ DELAY(int usec)
}
TSEXIT();
}
static uint32_t
riscv_timer_fill_vdso_timehands(struct vdso_timehands *vdso_th,
struct timecounter *tc)
{
vdso_th->th_algo = VDSO_TH_ALGO_RISCV_RDTIME;
bzero(vdso_th->th_res, sizeof(vdso_th->th_res));
return (1);
}