1 files changed, 82 insertions, 0 deletions
diff --git a/lib/libarch/alpha/gettimeofday.c b/lib/libarch/alpha/gettimeofday.c
new file mode 100644
index 00000000000..6ef009b37b4
--- /dev/null
+++ b/lib/libarch/alpha/gettimeofday.c
@@ -0,0 +1,82 @@
+/*	$NetBSD: gettimeofday.c,v 1.1 1995/12/20 12:56:06 cgd Exp $	*/
+
+/*
+ * Copyright (c) 1995 Carnegie-Mellon University.
+ * All rights reserved.
+ *
+ * Author: Chris G. Demetriou
+ *
+ * Permission to use, copy, modify and distribute this software and
+ * its documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
+ * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ */
+
+#include <sys/types.h> 
+#include <sys/fcntl.h>
+#include <sys/mman.h>
+#include <sys/syscall.h>
+#include <machine/sysarch.h>
+
+#include "libalpha.h"
+
+int
+gettimeofday(tvp, tzp)
+	struct timeval *tvp;
+	struct timezone *tzp;
+{
+	u_long opcc, npcc, pccdiff;
+	static struct timeval lasttime;
+
+	if (tzp == NULL && alpha_mmclockdata == NULL &&
+	    !__alpha_mmclock_init_failed)
+		alpha_mmclockdata = alpha_mmclock_init();
+	if (tzp != NULL || alpha_mmclockdata == NULL)
+		return (syscall(SYS_gettimeofday, tvp, tzp));
+
+	if (tvp == NULL)
+		return 0;
+
+	do {
+		tvp->tv_usec = alpha_mmclockdata->td_tv.tv_usec;
+		tvp->tv_sec = alpha_mmclockdata->td_tv.tv_sec;
+		opcc = alpha_mmclockdata->td_cc;
+	} while (tvp->tv_usec != alpha_mmclockdata->td_tv.tv_usec ||
+	    tvp->tv_sec != alpha_mmclockdata->td_tv.tv_sec);
+
+	npcc = rpcc() & 0x00000000ffffffffUL;
+	if (npcc < opcc)
+		npcc += 0x0000000100000000UL;
+	pccdiff = npcc - opcc;
+
+	tvp->tv_usec += (pccdiff * 1000000) / alpha_cycles_per_second;
+	if (tvp->tv_usec > 1000000) {
+		tvp->tv_sec++;
+		tvp->tv_usec -= 1000000;
+        }
+
+        if ((tvp->tv_sec == lasttime.tv_sec &&
+             tvp->tv_usec <= lasttime.tv_usec) &&
+            (tvp->tv_usec = lasttime.tv_usec + 1) > 1000000) {
+                tvp->tv_sec++;
+                tvp->tv_usec -= 1000000;
+        }
+
+        lasttime = *tvp;
+	return 0;
+}