X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=include%2Ftime.h;h=3f00e68713583e12a03adbcfefff84af7815c45a;hb=5fac11e6d5ab350429b8c8ddf47d3d3877ca89d1;hp=5ed021fabb8716cc56a1d9eb0c537dfb9edb8130;hpb=a7b817699985b515b63a601b317e3e8fd413d7e9;p=platform%2Fkernel%2Fu-boot.git

diff --git a/include/time.h b/include/time.h
index 5ed021f..3f00e68 100644
--- a/include/time.h
+++ b/include/time.h
@@ -1,10 +1,13 @@
-/*
- * SPDX-License-Identifier:	GPL-2.0+
- */
+/* SPDX-License-Identifier: GPL-2.0+ */
 
 #ifndef _TIME_H
 #define _TIME_H
 
+#include <linux/typecheck.h>
+#include <linux/types.h>
+
+ulong get_tbclk(void);
+
 unsigned long get_timer(unsigned long base);
 
 /*
@@ -12,5 +15,115 @@ unsigned long get_timer(unsigned long base);
  * Granularity may be larger than 1us if hardware does not support this.
  */
 unsigned long timer_get_us(void);
+uint64_t get_timer_us(uint64_t base);
+
+/**
+ * get_timer_us_long() - Get the number of elapsed microseconds
+ *
+ * This uses 32-bit arithmetic on 32-bit machines, which is enough to handle
+ * delays of over an hour. For 64-bit machines it uses a 64-bit value.
+ *
+ *@base: Base time to consider
+ *@return elapsed time since @base
+ */
+unsigned long get_timer_us_long(unsigned long base);
+
+/*
+ * timer_test_add_offset()
+ *
+ * Allow tests to add to the time reported through lib/time.c functions
+ * offset: number of milliseconds to advance the system time
+ */
+void timer_test_add_offset(unsigned long offset);
+
+/**
+ * usec_to_tick() - convert microseconds to clock ticks
+ *
+ * @usec:	duration in microseconds
+ * Return:	duration in clock ticks
+ */
+uint64_t usec_to_tick(unsigned long usec);
+
+/*
+ *	These inlines deal with timer wrapping correctly. You are
+ *	strongly encouraged to use them
+ *	1. Because people otherwise forget
+ *	2. Because if the timer wrap changes in future you won't have to
+ *	   alter your driver code.
+ *
+ * time_after(a,b) returns true if the time a is after time b.
+ *
+ * Do this with "<0" and ">=0" to only test the sign of the result. A
+ * good compiler would generate better code (and a really good compiler
+ * wouldn't care). Gcc is currently neither.
+ */
+#define time_after(a,b)		\
+	(typecheck(unsigned long, a) && \
+	 typecheck(unsigned long, b) && \
+	 ((long)((b) - (a)) < 0))
+#define time_before(a,b)	time_after(b,a)
+
+#define time_after_eq(a,b)	\
+	(typecheck(unsigned long, a) && \
+	 typecheck(unsigned long, b) && \
+	 ((long)((a) - (b)) >= 0))
+#define time_before_eq(a,b)	time_after_eq(b,a)
+
+/*
+ * Calculate whether a is in the range of [b, c].
+ */
+#define time_in_range(a,b,c) \
+	(time_after_eq(a,b) && \
+	 time_before_eq(a,c))
+
+/*
+ * Calculate whether a is in the range of [b, c).
+ */
+#define time_in_range_open(a,b,c) \
+	(time_after_eq(a,b) && \
+	 time_before(a,c))
+
+/**
+ * usec2ticks() - Convert microseconds to internal ticks
+ *
+ * @usec: Value of microseconds to convert
+ * @return Corresponding internal ticks value, calculated using get_tbclk()
+ */
+ulong usec2ticks(unsigned long usec);
+
+/**
+ * ticks2usec() - Convert internal ticks to microseconds
+ *
+ * @ticks: Value of ticks to convert
+ * @return Corresponding microseconds value, calculated using get_tbclk()
+ */
+ulong ticks2usec(unsigned long ticks);
+
+/**
+ * wait_ticks() - waits a given number of ticks
+ *
+ * This is an internal function typically used to implement udelay() and
+ * similar. Normally you should use udelay() or mdelay() instead.
+ *
+ * @ticks: Number of ticks to wait
+ */
+void wait_ticks(unsigned long ticks);
+
+/**
+ * timer_get_us() - Get monotonic microsecond timer
+ *
+ * @return value of monotonic microsecond timer
+ */
+unsigned long timer_get_us(void);
+
+/**
+ * get_ticks() - Get the current tick value
+ *
+ * This is an internal value used by the timer on the system. Ticks increase
+ * monotonically at the rate given by get_tbclk().
+ *
+ * @return current tick value
+ */
+uint64_t get_ticks(void);
 
 #endif /* _TIME_H */