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[src/simonb-timecounters]: src/sys/arch/i386/i386 - now in x86/x86/tsc.c
details: https://anonhg.NetBSD.org/src/rev/a19f63e87eb9
branches: simonb-timecounters
changeset: 587880:a19f63e87eb9
user: kardel <kardel%NetBSD.org@localhost>
date: Sun Apr 30 19:05:18 2006 +0000
description:
- now in x86/x86/tsc.c
diffstat:
sys/arch/i386/i386/tsc.c | 313 -----------------------------------------------
1 files changed, 0 insertions(+), 313 deletions(-)
diffs (truncated from 317 to 300 lines):
diff -r c612561494d9 -r a19f63e87eb9 sys/arch/i386/i386/tsc.c
--- a/sys/arch/i386/i386/tsc.c Sun Apr 30 19:01:24 2006 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,313 +0,0 @@
-/* $NetBSD: tsc.c,v 1.1.1.1.2.6 2006/04/22 23:09:31 kardel Exp $ */
-
-
-/*-
- * Copyright (c) 2006 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * re-implementation of TSC for MP systems merging cc_microtime and
- * TSC for timecounters by Frank Kardel
- *
- * 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the NetBSD
- * Foundation, Inc. and its contributors.
- * 4. Neither the name of The NetBSD Foundation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
- */
-
-/* basic calibration ideas are (kern_microtime.c): */
-/******************************************************************************
- * *
- * Copyright (c) David L. Mills 1993, 1994 *
- * *
- * Permission to use, copy, modify, and distribute this software and its *
- * documentation for any purpose and without fee is hereby granted, provided *
- * that the above copyright notice appears in all copies and that both the *
- * copyright notice and this permission notice appear in supporting *
- * documentation, and that the name University of Delaware not be used in *
- * advertising or publicity pertaining to distribution of the software *
- * without specific, written prior permission. The University of Delaware *
- * makes no representations about the suitability this software for any *
- * purpose. It is provided "as is" without express or implied warranty. *
- * *
- ******************************************************************************/
-
-/* reminiscents from older version of this file are: */
-/*-
- * Copyright (c) 1998-2003 Poul-Henning Kamp
- * 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.
- */
-
-#include <sys/cdefs.h>
-/* __FBSDID("$FreeBSD: src/sys/i386/i386/tsc.c,v 1.204 2003/10/21 18:28:34 silby Exp $"); */
-__KERNEL_RCSID(0, "$NetBSD: tsc.c,v 1.1.1.1.2.6 2006/04/22 23:09:31 kardel Exp $");
-
-#include "opt_multiprocessor.h"
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/sysctl.h>
-#include <sys/time.h>
-#include <sys/timetc.h>
-#include <sys/kernel.h>
-#include <sys/power.h>
-#include <sys/reboot.h> /* XXX for bootverbose */
-#include <machine/cpu.h>
-#include <machine/cpu_counter.h>
-#include <machine/clock.h>
-#include <machine/specialreg.h>
-
-uint64_t tsc_freq;
-u_int tsc_present;
-int tsc_is_broken = 0;
-
-static int64_t tsc_cal_val; /* last calibrate time stamp */
-
-static timecounter_get_t tsc_get_timecount;
-static timecounter_pps_t tsc_calibrate;
-
-void tsc_calibrate_cpu(struct cpu_info *);
-
-static struct timecounter tsc_timecounter = {
- tsc_get_timecount, /* get_timecount */
- tsc_calibrate, /* once per second - used to calibrate cpu TSC */
- ~0u, /* counter_mask */
- 0, /* frequency */
- "TSC", /* name */
- 800, /* quality (adjusted in code) */
-};
-
-void
-init_TSC(void)
-{
- u_int64_t tscval[2];
-
- if (cpu_feature & CPUID_TSC)
- tsc_present = 1;
- else
- tsc_present = 0;
-
- if (!tsc_present)
- return;
-
- if (bootverbose)
- printf("Calibrating TSC clock ... ");
-
- do {
- tscval[0] = rdtsc();
- DELAY(1000000);
- tscval[1] = rdtsc();
- } while (tscval[1] < tscval[0]);
-
- tsc_freq = tscval[1] - tscval[0];
- if (bootverbose)
- printf("TSC clock: %" PRId64 " Hz\n", tsc_freq);
-}
-
-void
-init_TSC_tc(void)
-{
- if (tsc_present && tsc_freq != 0 && !tsc_is_broken) {
- tsc_timecounter.tc_frequency = tsc_freq;
- tc_init(&tsc_timecounter);
- }
-}
-
-#ifdef __FreeBSD__
-static int
-sysctl_machdep_tsc_freq(SYSCTL_HANDLER_ARGS)
-{
- int error;
- uint64_t freq;
-
- if (tsc_timecounter.tc_frequency == 0)
- return (EOPNOTSUPP);
- freq = tsc_freq;
- error = sysctl_handle_int(oidp, &freq, sizeof(freq), req);
- if (error == 0 && req->newptr != NULL) {
- tsc_freq = freq;
- tsc_timecounter.tc_frequency = tsc_freq;
- }
- return (error);
-}
-
-SYSCTL_PROC(_machdep, OID_AUTO, tsc_freq, CTLTYPE_QUAD | CTLFLAG_RW,
- 0, sizeof(u_int), sysctl_machdep_tsc_freq, "IU", "");
-#endif /* __FreeBSD__ */
-
-/*
- * pick up tick count scaled to reference tick count
- */
-static u_int
-tsc_get_timecount(struct timecounter *tc)
-{
- struct cpu_info *ci = curcpu();
- int64_t cc;
- int s;
-
- if (ci->ci_cc.cc_denom == 0) {
- /*
- * This is our first time here on this CPU. Just
- * start with reasonable initial values.
- */
- ci->ci_cc.cc_cc = cpu_counter32();
- ci->ci_cc.cc_val = 0;
- ci->ci_cc.cc_denom = cpu_frequency(ci);
- if (ci->ci_cc.cc_denom == 0)
- ci->ci_cc.cc_denom = tsc_freq;
- ci->ci_cc.cc_delta = ci->ci_cc.cc_denom;
- }
-
- s = splipi();
-
- /* determine local delta ticks */
- cc = cpu_counter32() - ci->ci_cc.cc_cc;
-
- if (cc < 0)
- cc += 0x100000000LL;
-
- /* scale to primary */
- cc = (cc * ci->ci_cc.cc_delta) / ci->ci_cc.cc_denom + ci->ci_cc.cc_val;
-
- splx(s);
-
- return cc;
-}
-
-/*
- * called once per second via the pps callback
- * for the calibration of the TSC counters.
- * it is called only for the PRIMARY cpu. all
- * other cpus are called via a broadcast IPI
- */
-static void
-tsc_calibrate(struct timecounter *tc)
-{
- struct cpu_info *ci = curcpu();
-
- /* pick up reference ticks */
- tsc_cal_val = cpu_counter32();
-
-#if defined(MULTIPROCESSOR)
- x86_broadcast_ipi(X86_IPI_MICROSET);
-#endif
-
- tsc_calibrate_cpu(ci);
-}
-
-/*
- * This routine is called about once per second directly by the master
- * processor and via an interprocessor interrupt for other processors.
- * It determines the CC frequency of each processor relative to the
- * master clock and the time this determination is made. These values
- * are used by tsc_get_timecount() to interpolate the ticks between
- * timer interrupts. Note that we assume the kernel variables have
- * been zeroed early in life.
- */
-void
-tsc_calibrate_cpu(struct cpu_info *ci)
-{
- int64_t val;
- int64_t delta, denom;
-#ifdef TIMECOUNTER_DEBUG
- int64_t factor, old_factor;
-#endif
- /* XXX must check: Note: Clock interrupts are already blocked. */
-
- val = tsc_cal_val;
-
- denom = ci->ci_cc.cc_cc;
- ci->ci_cc.cc_cc = cpu_counter32();
-
- if (ci->ci_cc.cc_denom == 0) {
- /*
- * This is our first time here on this CPU. Just
- * start with reasonable initial values.
- */
- ci->ci_cc.cc_val = val;
- ci->ci_cc.cc_denom = cpu_frequency(ci);
- if (ci->ci_cc.cc_denom == 0)
- ci->ci_cc.cc_denom = tsc_freq;
- ci->ci_cc.cc_delta = ci->ci_cc.cc_denom;
- return;
- }
-
-#ifdef TIMECOUNTER_DEBUG
- old_factor = (ci->ci_cc.cc_delta * 1000 ) / ci->ci_cc.cc_denom;
-#endif
-
- /* local ticks per period */
- denom = ci->ci_cc.cc_cc - denom;
- if (denom < 0)
- denom += 0x100000000LL;
-
- ci->ci_cc.cc_denom = denom;
-
- /* reference ticks per period */
- delta = val - ci->ci_cc.cc_val;
- if (delta < 0)
- delta += 0x100000000LL;
-
- ci->ci_cc.cc_val = val;
- ci->ci_cc.cc_delta = delta;
-
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