summaryrefslogtreecommitdiffstats
path: root/arch/tile/kernel/time.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/tile/kernel/time.c')
-rw-r--r--arch/tile/kernel/time.c37
1 files changed, 36 insertions, 1 deletions
diff --git a/arch/tile/kernel/time.c b/arch/tile/kernel/time.c
index 7c353d8c2da..5d10642db63 100644
--- a/arch/tile/kernel/time.c
+++ b/arch/tile/kernel/time.c
@@ -23,8 +23,10 @@
#include <linux/smp.h>
#include <linux/delay.h>
#include <linux/module.h>
+#include <linux/timekeeper_internal.h>
#include <asm/irq_regs.h>
#include <asm/traps.h>
+#include <asm/vdso.h>
#include <hv/hypervisor.h>
#include <arch/interrupts.h>
#include <arch/spr_def.h>
@@ -110,7 +112,6 @@ void __init time_init(void)
setup_tile_timer();
}
-
/*
* Define the tile timer clock event device. The timer is driven by
* the TILE_TIMER_CONTROL register, which consists of a 31-bit down
@@ -237,3 +238,37 @@ cycles_t ns2cycles(unsigned long nsecs)
struct clock_event_device *dev = &__raw_get_cpu_var(tile_timer);
return ((u64)nsecs * dev->mult) >> dev->shift;
}
+
+void update_vsyscall_tz(void)
+{
+ /* Userspace gettimeofday will spin while this value is odd. */
+ ++vdso_data->tz_update_count;
+ smp_wmb();
+ vdso_data->tz_minuteswest = sys_tz.tz_minuteswest;
+ vdso_data->tz_dsttime = sys_tz.tz_dsttime;
+ smp_wmb();
+ ++vdso_data->tz_update_count;
+}
+
+void update_vsyscall(struct timekeeper *tk)
+{
+ struct timespec wall_time = tk_xtime(tk);
+ struct timespec *wtm = &tk->wall_to_monotonic;
+ struct clocksource *clock = tk->clock;
+
+ if (clock != &cycle_counter_cs)
+ return;
+
+ /* Userspace gettimeofday will spin while this value is odd. */
+ ++vdso_data->tb_update_count;
+ smp_wmb();
+ vdso_data->xtime_tod_stamp = clock->cycle_last;
+ vdso_data->xtime_clock_sec = wall_time.tv_sec;
+ vdso_data->xtime_clock_nsec = wall_time.tv_nsec;
+ vdso_data->wtom_clock_sec = wtm->tv_sec;
+ vdso_data->wtom_clock_nsec = wtm->tv_nsec;
+ vdso_data->mult = clock->mult;
+ vdso_data->shift = clock->shift;
+ smp_wmb();
+ ++vdso_data->tb_update_count;
+}