patch-2.1.106 linux/arch/m68k/hp300/time.c

• Lines: 64
• Date: Sat Jun 13 13:14:31 1998
• Orig file: v2.1.105/linux/arch/m68k/hp300/time.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.105/linux/arch/m68k/hp300/time.c linux/arch/m68k/hp300/time.c
@@ -0,0 +1,63 @@
+/*
+ *  linux/arch/m68k/hp300/time.c
+ *
+ *  Copyright (C) 1998 Philip Blundell <philb@gnu.org>
+ *
+ *  This file contains the HP300-specific time handling code.
+ */
+
+#include <linux/config.h>
+#include <asm/ptrace.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/interrupt.h>
+#include <asm/machdep.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/traps.h>
+#include "ints.h"
+
+/* Clock hardware definitions */
+
+#define CLOCKBASE	0xf05f8000
+
+#define	CLKCR1		0x1
+#define	CLKCR2		0x3
+#define	CLKCR3		CLKCR1
+#define	CLKSR		CLKCR2
+#define	CLKMSB1		0x5
+#define	CLKMSB2		0x9
+#define	CLKMSB3		0xD
+
+unsigned long hp300_gettimeoffset (void)
+{
+	return 0L;
+}
+
+static void hp300_tick(int irq, void *dev_id, struct pt_regs *regs)
+{
+  unsigned long tmp;
+  void (*vector)(int, void *, struct pt_regs *) = dev_id;
+  readb(CLOCKBASE + CLKSR);
+  asm volatile ("movpw %1@(5),%0" : "=r" (tmp) : "a" (CLOCKBASE));
+  vector(irq, NULL, regs);
+}
+
+__initfunc(void hp300_sched_init(void (*vector)(int, void *, struct pt_regs *)))
+{
+  unsigned int intval = (10000 / 4) - 1;
+
+  writeb(0x1, CLOCKBASE + CLKCR2);		/* select CR1 */
+  writeb(0x1, CLOCKBASE + CLKCR1);		/* reset */
+
+  asm volatile(" movpw %0,%1@(5)" : : "d" (intval), "a" (CLOCKBASE));
+
+  sys_request_irq(6, hp300_tick, IRQ_FLG_STD, "timer tick", vector);
+
+  writeb(0x1, CLOCKBASE + CLKCR2);		/* select CR1 */
+  writeb(0x40, CLOCKBASE + CLKCR1);		/* enable irq */
+}
+