patch-1.3.44 linux/arch/sparc/kernel/time.c

• Lines: 80
• Date: Sat Nov 25 02:58:47 1995
• Orig file: v1.3.43/linux/arch/sparc/kernel/time.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.43/linux/arch/sparc/kernel/time.c linux/arch/sparc/kernel/time.c
@@ -0,0 +1,79 @@
+/* $Id: time.c,v 1.3 1995/11/25 00:58:45 davem Exp $
+ * linux/arch/sparc/kernel/time.c
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ *
+ * This file handles the Sparc specific time handling details.
+ */
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/timex.h>
+
+#include <asm/segment.h>
+#include <asm/timer.h>
+
+#define TIMER_IRQ  10    /* Also at level 14, but we ignore that one. */
+
+static int set_rtc_mmss(unsigned long);
+
+/*
+ * timer_interrupt() needs to keep up the real-time clock,
+ * as well as call the "do_timer()" routine every clocktick
+ */
+void timer_interrupt(int irq, struct pt_regs * regs)
+{
+	/* last time the cmos clock got updated */
+	static long last_rtc_update=0;
+	volatile unsigned int clear_intr;
+
+	/* First, clear the interrupt. */
+	clear_intr = *master_l10_limit;
+
+	do_timer(regs);
+
+	/* XXX I don't know if this is right for the Sparc yet. XXX */
+	if (time_state != TIME_BAD && xtime.tv_sec > last_rtc_update + 660 &&
+	    xtime.tv_usec > 500000 - (tick >> 1) &&
+	    xtime.tv_usec < 500000 + (tick >> 1))
+	  if (set_rtc_mmss(xtime.tv_sec) == 0)
+	    last_rtc_update = xtime.tv_sec;
+	  else
+	    last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */
+}
+
+void time_init(void)
+{
+	request_irq(TIMER_IRQ, timer_interrupt, SA_INTERRUPT, "timer");
+	return;
+}
+/* Nothing fancy on the Sparc yet. */
+void do_gettimeofday(struct timeval *tv)
+{
+	unsigned long flags;
+
+	save_flags(flags);
+	cli();
+	*tv = xtime;
+	restore_flags(flags);
+}
+
+void do_settimeofday(struct timeval *tv)
+{
+	cli();
+	xtime = *tv;
+	time_state = TIME_BAD;
+	time_maxerror = 0x70000000;
+	time_esterror = 0x70000000;
+	sti();
+}
+
+/* XXX Mostek RTC code needs to be written XXX */
+static int set_rtc_mmss(unsigned long nowtime)
+{
+	/* Just say we succeeded for now. */
+	return 0;
+}