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-rw-r--r--include/linux/clocksource.h102
1 files changed, 0 insertions, 102 deletions
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index abcafaa20b86..9c78d15d33e4 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -18,8 +18,6 @@
#include <asm/div64.h>
#include <asm/io.h>
-/* clocksource cycle base type */
-typedef u64 cycle_t;
struct clocksource;
struct module;
@@ -28,106 +26,6 @@ struct module;
#endif
/**
- * struct cyclecounter - hardware abstraction for a free running counter
- * Provides completely state-free accessors to the underlying hardware.
- * Depending on which hardware it reads, the cycle counter may wrap
- * around quickly. Locking rules (if necessary) have to be defined
- * by the implementor and user of specific instances of this API.
- *
- * @read: returns the current cycle value
- * @mask: bitmask for two's complement
- * subtraction of non 64 bit counters,
- * see CLOCKSOURCE_MASK() helper macro
- * @mult: cycle to nanosecond multiplier
- * @shift: cycle to nanosecond divisor (power of two)
- */
-struct cyclecounter {
- cycle_t (*read)(const struct cyclecounter *cc);
- cycle_t mask;
- u32 mult;
- u32 shift;
-};
-
-/**
- * struct timecounter - layer above a %struct cyclecounter which counts nanoseconds
- * Contains the state needed by timecounter_read() to detect
- * cycle counter wrap around. Initialize with
- * timecounter_init(). Also used to convert cycle counts into the
- * corresponding nanosecond counts with timecounter_cyc2time(). Users
- * of this code are responsible for initializing the underlying
- * cycle counter hardware, locking issues and reading the time
- * more often than the cycle counter wraps around. The nanosecond
- * counter will only wrap around after ~585 years.
- *
- * @cc: the cycle counter used by this instance
- * @cycle_last: most recent cycle counter value seen by
- * timecounter_read()
- * @nsec: continuously increasing count
- */
-struct timecounter {
- const struct cyclecounter *cc;
- cycle_t cycle_last;
- u64 nsec;
-};
-
-/**
- * cyclecounter_cyc2ns - converts cycle counter cycles to nanoseconds
- * @cc: Pointer to cycle counter.
- * @cycles: Cycles
- *
- * XXX - This could use some mult_lxl_ll() asm optimization. Same code
- * as in cyc2ns, but with unsigned result.
- */
-static inline u64 cyclecounter_cyc2ns(const struct cyclecounter *cc,
- cycle_t cycles)
-{
- u64 ret = (u64)cycles;
- ret = (ret * cc->mult) >> cc->shift;
- return ret;
-}
-
-/**
- * timecounter_init - initialize a time counter
- * @tc: Pointer to time counter which is to be initialized/reset
- * @cc: A cycle counter, ready to be used.
- * @start_tstamp: Arbitrary initial time stamp.
- *
- * After this call the current cycle register (roughly) corresponds to
- * the initial time stamp. Every call to timecounter_read() increments
- * the time stamp counter by the number of elapsed nanoseconds.
- */
-extern void timecounter_init(struct timecounter *tc,
- const struct cyclecounter *cc,
- u64 start_tstamp);
-
-/**
- * timecounter_read - return nanoseconds elapsed since timecounter_init()
- * plus the initial time stamp
- * @tc: Pointer to time counter.
- *
- * In other words, keeps track of time since the same epoch as
- * the function which generated the initial time stamp.
- */
-extern u64 timecounter_read(struct timecounter *tc);
-
-/**
- * timecounter_cyc2time - convert a cycle counter to same
- * time base as values returned by
- * timecounter_read()
- * @tc: Pointer to time counter.
- * @cycle_tstamp: a value returned by tc->cc->read()
- *
- * Cycle counts that are converted correctly as long as they
- * fall into the interval [-1/2 max cycle count, +1/2 max cycle count],
- * with "max cycle count" == cs->mask+1.
- *
- * This allows conversion of cycle counter values which were generated
- * in the past.
- */
-extern u64 timecounter_cyc2time(struct timecounter *tc,
- cycle_t cycle_tstamp);
-
-/**
* struct clocksource - hardware abstraction for a free running counter
* Provides mostly state-free accessors to the underlying hardware.
* This is the structure used for system time.