patch-2.4.0-test12 linux/arch/parisc/kernel/time.c

• Lines: 99
• Date: Wed Dec 6 11:46:39 2000
• Orig file: v2.4.0-test11/linux/arch/parisc/kernel/time.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test11/linux/arch/parisc/kernel/time.c linux/arch/parisc/kernel/time.c
@@ -0,0 +1,98 @@
+/*
+ *  linux/arch/arm/kernel/time.c
+ *
+ *  Copyright (C) 1991, 1992, 1995  Linus Torvalds
+ *  Modifications for ARM (C) 1994, 1995, 1996,1997 Russell King
+ *  Copyright (C) 1999 SuSE GmbH, (Philipp Rumpf, prumpf@tux.org)
+ *
+ * 1994-07-02  Alan Modra
+ *             fixed set_rtc_mmss, fixed time.year for >= 2000, new mktime
+ * 1998-12-20  Updated NTP code according to technical memorandum Jan '96
+ *             "A Kernel Model for Precision Timekeeping" by Dave Mills
+ */
+#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/interrupt.h>
+#include <linux/time.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/param.h>
+#include <asm/pdc.h>
+#include <asm/led.h>
+
+#include <linux/timex.h>
+
+extern rwlock_t xtime_lock;
+
+static int timer_value;
+static int timer_delta;
+static struct pdc_tod tod_data __attribute__((aligned(8)));
+
+void timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	int old;
+	int lost = 0;
+	int cr16;
+	
+	old = timer_value;
+
+	cr16 = mfctl(16);
+	while((timer_value - cr16) < (timer_delta / 2)) {
+		timer_value += timer_delta;
+		lost++;
+	}
+
+	mtctl(timer_value ,16);
+
+	do_timer(regs);
+    
+	led_interrupt_func();
+}
+
+void do_gettimeofday(struct timeval *tv)
+{
+	unsigned long flags;
+	
+	read_lock_irqsave(&xtime_lock, flags);
+	tv->tv_sec = xtime.tv_sec;
+	tv->tv_usec = xtime.tv_usec;
+	read_unlock_irqrestore(&xtime_lock, flags);
+
+}
+
+void do_settimeofday(struct timeval *tv)
+{
+	write_lock_irq(&xtime_lock);
+	xtime.tv_sec = tv->tv_sec;
+	xtime.tv_usec = tv->tv_usec;
+	write_unlock_irq(&xtime_lock);
+}
+
+void __init time_init(void)
+{
+	timer_delta = (100 * PAGE0->mem_10msec) / HZ;
+
+	/* make the first timer interrupt go off in one second */
+	timer_value = mfctl(16) + (HZ * timer_delta);
+	mtctl(timer_value, 16);
+
+
+	if(pdc_tod_read(&tod_data) == 0) {
+		xtime.tv_sec = tod_data.tod_sec;
+		xtime.tv_usec = tod_data.tod_usec;
+	} else {
+		printk(KERN_ERR "Error reading tod clock\n");
+	        xtime.tv_sec = 0;
+		xtime.tv_usec = 0;
+	}
+
+}
+