1 files changed, 69 insertions, 0 deletions
diff --git a/arch/sparc/kernel/vdso.c b/arch/sparc/kernel/vdso.c
new file mode 100644
index 0000000000..0e27437eb9
--- /dev/null
+++ b/arch/sparc/kernel/vdso.c
@@ -0,0 +1,69 @@
+/*
+ *  Copyright (C) 2001 Andrea Arcangeli <andrea@suse.de> SuSE
+ *  Copyright 2003 Andi Kleen, SuSE Labs.
+ *
+ *  Thanks to hpa@transmeta.com for some useful hint.
+ *  Special thanks to Ingo Molnar for his early experience with
+ *  a different vsyscall implementation for Linux/IA32 and for the name.
+ */
+
+#include <linux/time.h>
+#include <linux/timekeeper_internal.h>
+
+#include <asm/vvar.h>
+
+void update_vsyscall_tz(void)
+{
+	if (unlikely(vvar_data == NULL))
+		return;
+
+	vvar_data->tz_minuteswest = sys_tz.tz_minuteswest;
+	vvar_data->tz_dsttime = sys_tz.tz_dsttime;
+}
+
+void update_vsyscall(struct timekeeper *tk)
+{
+	struct vvar_data *vdata = vvar_data;
+
+	if (unlikely(vdata == NULL))
+		return;
+
+	vvar_write_begin(vdata);
+	vdata->vclock_mode = tk->tkr_mono.clock->archdata.vclock_mode;
+	vdata->clock.cycle_last = tk->tkr_mono.cycle_last;
+	vdata->clock.mask = tk->tkr_mono.mask;
+	vdata->clock.mult = tk->tkr_mono.mult;
+	vdata->clock.shift = tk->tkr_mono.shift;
+
+	vdata->wall_time_sec = tk->xtime_sec;
+	vdata->wall_time_snsec = tk->tkr_mono.xtime_nsec;
+
+	vdata->monotonic_time_sec = tk->xtime_sec +
+				    tk->wall_to_monotonic.tv_sec;
+	vdata->monotonic_time_snsec = tk->tkr_mono.xtime_nsec +
+				      (tk->wall_to_monotonic.tv_nsec <<
+				       tk->tkr_mono.shift);
+
+	while (vdata->monotonic_time_snsec >=
+	       (((u64)NSEC_PER_SEC) << tk->tkr_mono.shift)) {
+		vdata->monotonic_time_snsec -=
+				((u64)NSEC_PER_SEC) << tk->tkr_mono.shift;
+		vdata->monotonic_time_sec++;
+	}
+
+	vdata->wall_time_coarse_sec = tk->xtime_sec;
+	vdata->wall_time_coarse_nsec =
+			(long)(tk->tkr_mono.xtime_nsec >> tk->tkr_mono.shift);
+
+	vdata->monotonic_time_coarse_sec =
+		vdata->wall_time_coarse_sec + tk->wall_to_monotonic.tv_sec;
+	vdata->monotonic_time_coarse_nsec =
+		vdata->wall_time_coarse_nsec + tk->wall_to_monotonic.tv_nsec;
+
+	while (vdata->monotonic_time_coarse_nsec >= NSEC_PER_SEC) {
+		vdata->monotonic_time_coarse_nsec -= NSEC_PER_SEC;
+		vdata->monotonic_time_coarse_sec++;
+	}
+
+	vvar_write_end(vdata);
+}