Cleanup the clock code. This includes:

o  Remove alpha specific timer code (mc146818A) and compiled-out
   calibration of said timer.
o  Remove i386 inherited timer code (i8253) and related acquire and
   release functions.
o  Move sysbeep() from clock.c to machdep.c and have it return
   ENODEV. Console beeps should be implemented using ACPI or if no
   such device is described, using the sound driver.
o  Move the sysctls related to adjkerntz, disable_rtc_set and
   wall_cmos_clock from machdep.c to clock.c, where the variables
   are.
o  Don't hardcode a hz value of 1024 in cpu_initclocks() and don't
   bother faking a stathz that's 1/8 of that. Keep it simple: hz
   defaults to HZ and stathz equals hz. This is also how it's done
   for sparc64.
o  Keep a per-CPU ITC counter (pc_clock) and adjustment (pc_clockadj)
   to calculate ITC skew and corrections. On average, we adjust the
   ITC match register once every ~1500 interrupts for a duration of
   2 consequtive interruprs. This is to correct the non-deterministic
   behaviour of the ITC interrupt (there's a delay between the match
   and the raising of the interrupt).
o  Add 4 debugging sysctls to monitor clock behaviour. Those are
   debug.clock_adjust_edges, debug.clock_adjust_excess,
   debug.clock_adjust_lost and debug.clock_adjust_ticks. The first
   counts the individual adjustment cycles (when the skew first
   crosses the threshold), the second counts the number of times the
   adjustment was excessive (any non-zero value is to be considered
   a bug), the third counts lost clock interrupts and the last counts
   the number of interrupts for which we applied an adjustment
   (debug.clock_adjust_ticks / debug.clock_adjust_edges gives the
   avarage duration of an individual adjustment -- should be ~2).

While here, remove some nearby (trivial) left-overs from alpha and
other cleanups.

1 files changed, 6 insertions, 8 deletions

diff --git a/sys/ia64/include/clock.h b/sys/ia64/include/clock.h
index 41e3bf6..ef76769 100644
--- a/sys/ia64/include/clock.h
+++ b/sys/ia64/include/clock.h
@@ -13,16 +13,14 @@
 
 #define	CLOCK_VECTOR	254
 
-extern	int	disable_rtc_set;
-extern	int	wall_cmos_clock;
-extern	int	adjkerntz;
+extern int adjkerntz;
+extern int disable_rtc_set;
+extern int wall_cmos_clock;
 
-extern u_int64_t	itc_frequency;
-extern u_int64_t	itm_reload;
+extern uint64_t	ia64_clock_reload;
+extern uint64_t	itc_frequency;
 
-int	sysbeep(int pitch, int period);
-int	acquire_timer2(int mode);
-int	release_timer2(void);
+int sysbeep(int pitch, int period);
 
 #endif