freebsd-dev/sys/ia64/include/pcpu.h
Marcel Moolenaar 46e31b2612 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.
2003-08-04 05:13:18 +00:00

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2.1 KiB
C

/*-
* Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
* Copyright (c) Peter Wemm <peter@netplex.com.au>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _MACHINE_PCPU_H_
#define _MACHINE_PCPU_H_
#ifdef _KERNEL
#define PCPU_MD_FIELDS \
struct pcb *pc_pcb; /* Used by IPI_STOP */ \
struct pmap *pc_current_pmap; /* active pmap */ \
uint64_t pc_lid; /* local CPU ID */ \
uint32_t pc_awake:1; /* CPU is awake? */ \
uint64_t pc_clock; /* Clock counter. */ \
uint64_t pc_clockadj; /* Clock adjust. */
struct pcpu;
register struct pcpu *pcpup __asm__("r13");
#define PCPU_GET(member) (pcpup->pc_ ## member)
#define PCPU_PTR(member) (&pcpup->pc_ ## member)
#define PCPU_SET(member,value) (pcpup->pc_ ## member = (value))
void pcpu_initclock(void);
#endif /* _KERNEL */
#endif /* !_MACHINE_PCPU_H_ */