Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / clocksource / arm_arch_timer.h

diff --git a/kernel/include/clocksource/arm_arch_timer.h b/kernel/include/clocksource/arm_arch_timer.h
new file mode 100644 (file)
index 0000000..9916d0e
--- /dev/null
+++ b/kernel/include/clocksource/arm_arch_timer.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __CLKSOURCE_ARM_ARCH_TIMER_H
+#define __CLKSOURCE_ARM_ARCH_TIMER_H
+
+#include <linux/timecounter.h>
+#include <linux/types.h>
+
+#define ARCH_TIMER_CTRL_ENABLE         (1 << 0)
+#define ARCH_TIMER_CTRL_IT_MASK                (1 << 1)
+#define ARCH_TIMER_CTRL_IT_STAT                (1 << 2)
+
+enum arch_timer_reg {
+       ARCH_TIMER_REG_CTRL,
+       ARCH_TIMER_REG_TVAL,
+};
+
+#define ARCH_TIMER_PHYS_ACCESS         0
+#define ARCH_TIMER_VIRT_ACCESS         1
+#define ARCH_TIMER_MEM_PHYS_ACCESS     2
+#define ARCH_TIMER_MEM_VIRT_ACCESS     3
+
+#define ARCH_TIMER_USR_PCT_ACCESS_EN   (1 << 0) /* physical counter */
+#define ARCH_TIMER_USR_VCT_ACCESS_EN   (1 << 1) /* virtual counter */
+#define ARCH_TIMER_VIRT_EVT_EN         (1 << 2)
+#define ARCH_TIMER_EVT_TRIGGER_SHIFT   (4)
+#define ARCH_TIMER_EVT_TRIGGER_MASK    (0xF << ARCH_TIMER_EVT_TRIGGER_SHIFT)
+#define ARCH_TIMER_USR_VT_ACCESS_EN    (1 << 8) /* virtual timer registers */
+#define ARCH_TIMER_USR_PT_ACCESS_EN    (1 << 9) /* physical timer registers */
+
+#define ARCH_TIMER_EVT_STREAM_FREQ     10000   /* 100us */
+
+#ifdef CONFIG_ARM_ARCH_TIMER
+
+extern u32 arch_timer_get_rate(void);
+extern u64 (*arch_timer_read_counter)(void);
+extern struct timecounter *arch_timer_get_timecounter(void);
+
+#else
+
+static inline u32 arch_timer_get_rate(void)
+{
+       return 0;
+}
+
+static inline u64 arch_timer_read_counter(void)
+{
+       return 0;
+}
+
+static inline struct timecounter *arch_timer_get_timecounter(void)
+{
+       return NULL;
+}
+
+#endif
+
+#endif