summaryrefslogtreecommitdiffstats
path: root/kernel/arch/ia64/include/asm/timex.h
diff options
context:
space:
mode:
authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/ia64/include/asm/timex.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/ia64/include/asm/timex.h')
-rw-r--r--kernel/arch/ia64/include/asm/timex.h45
1 files changed, 45 insertions, 0 deletions
diff --git a/kernel/arch/ia64/include/asm/timex.h b/kernel/arch/ia64/include/asm/timex.h
new file mode 100644
index 000000000..86c7db861
--- /dev/null
+++ b/kernel/arch/ia64/include/asm/timex.h
@@ -0,0 +1,45 @@
+#ifndef _ASM_IA64_TIMEX_H
+#define _ASM_IA64_TIMEX_H
+
+/*
+ * Copyright (C) 1998-2001, 2003 Hewlett-Packard Co
+ * David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+/*
+ * 2001/01/18 davidm Removed CLOCK_TICK_RATE. It makes no sense on IA-64.
+ * Also removed cacheflush_time as it's entirely unused.
+ */
+
+#include <asm/intrinsics.h>
+#include <asm/processor.h>
+
+typedef unsigned long cycles_t;
+
+extern void (*ia64_udelay)(unsigned long usecs);
+
+/*
+ * For performance reasons, we don't want to define CLOCK_TICK_TRATE as
+ * local_cpu_data->itc_rate. Fortunately, we don't have to, either: according to George
+ * Anzinger, 1/CLOCK_TICK_RATE is taken as the resolution of the timer clock. The time
+ * calculation assumes that you will use enough of these so that your tick size <= 1/HZ.
+ * If the calculation shows that your CLOCK_TICK_RATE can not supply exactly 1/HZ ticks,
+ * the actual value is calculated and used to update the wall clock each jiffie. Setting
+ * the CLOCK_TICK_RATE to x*HZ insures that the calculation will find no errors. Hence we
+ * pick a multiple of HZ which gives us a (totally virtual) CLOCK_TICK_RATE of about
+ * 100MHz.
+ */
+#define CLOCK_TICK_RATE (HZ * 100000UL)
+
+static inline cycles_t
+get_cycles (void)
+{
+ cycles_t ret;
+
+ ret = ia64_getreg(_IA64_REG_AR_ITC);
+ return ret;
+}
+
+extern void ia64_cpu_local_tick (void);
+extern unsigned long long ia64_native_sched_clock (void);
+
+#endif /* _ASM_IA64_TIMEX_H */