patch-2.3.48 linux/include/asm-mips64/timex.h

• Lines: 40
• Date: Thu Feb 24 22:53:35 2000
• Orig file: v2.3.47/linux/include/asm-mips64/timex.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.47/linux/include/asm-mips64/timex.h linux/include/asm-mips64/timex.h
@@ -0,0 +1,39 @@
+/* $Id: timex.h,v 1.1 1999/08/18 23:37:53 ralf Exp $
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1998, 1999 by Ralf Baechle
+ *
+ * FIXME: For some of the supported machines this is dead wrong.
+ */
+#ifndef _ASM_TIMEX_H
+#define _ASM_TIMEX_H
+
+#define CLOCK_TICK_RATE	1193180 /* Underlying HZ */
+#define CLOCK_TICK_FACTOR	20	/* Factor of both 1000000 and CLOCK_TICK_RATE */
+#define FINETUNE ((((((long)LATCH * HZ - CLOCK_TICK_RATE) << SHIFT_HZ) * \
+	(1000000/CLOCK_TICK_FACTOR) / (CLOCK_TICK_RATE/CLOCK_TICK_FACTOR)) \
+		<< (SHIFT_SCALE-SHIFT_HZ)) / HZ)
+
+/*
+ * Standard way to access the cycle counter.
+ * Currently only used on SMP for scheduling.
+ *
+ * Only the low 32 bits are available as a continuously counting entity. 
+ * But this only means we'll force a reschedule every 8 seconds or so,
+ * which isn't an evil thing.
+ *
+ * We know that all SMP capable CPUs have cycle counters.
+ */
+
+typedef unsigned int cycles_t;
+extern cycles_t cacheflush_time;
+
+static inline cycles_t get_cycles (void)
+{
+	return read_32bit_cp0_register(CP0_COUNT);
+}
+
+#endif /*  _ASM_TIMEX_H */