Date: Fri, 29 May 2009 13:36:06 +0000 (UTC) From: Adrian Chadd <adrian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r193032 - in head/sys: conf i386/include/xen i386/xen Message-ID: <200905291336.n4TDa66k076084@svn.freebsd.org>
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Author: adrian Date: Fri May 29 13:36:06 2009 New Revision: 193032 URL: http://svn.freebsd.org/changeset/base/193032 Log: Migrate the Xen hypervisor clock reading routines into something sharable. Added: head/sys/i386/include/xen/xen_clock_util.h (contents, props changed) head/sys/i386/xen/xen_clock_util.c (contents, props changed) Modified: head/sys/conf/files.i386 head/sys/i386/xen/xen_rtc.c Modified: head/sys/conf/files.i386 ============================================================================== --- head/sys/conf/files.i386 Fri May 29 12:50:35 2009 (r193031) +++ head/sys/conf/files.i386 Fri May 29 13:36:06 2009 (r193032) @@ -327,6 +327,7 @@ i386/isa/atpic.c optional atpic #i386/isa/atpic_vector.s standard i386/isa/clock.c optional native i386/xen/clock.c optional xen +i386/xen/xen_clock_util.c optional xen i386/xen/xen_rtc.c optional xen i386/isa/dpms.c optional dpms i386/isa/elcr.c standard Added: head/sys/i386/include/xen/xen_clock_util.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/i386/include/xen/xen_clock_util.h Fri May 29 13:36:06 2009 (r193032) @@ -0,0 +1,38 @@ +/* + * + * Copyright (c) 2009 Adrian Chadd + * 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. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 __XEN_CLOCK_UTIL_H__ +#define __XEN_CLOCK_UTIL_H__ + +extern void xen_fetch_wallclock(struct timespec *ts); +extern void xen_fetch_uptime(struct timespec *ts); + +#endif /* __XEN_CLOCK_UTIL_H__ */ Added: head/sys/i386/xen/xen_clock_util.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/i386/xen/xen_clock_util.c Fri May 29 13:36:06 2009 (r193032) @@ -0,0 +1,101 @@ +/*- + * Copyright (c) 2009 Adrian Chadd + * 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. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/clock.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/time.h> + +#include <xen/xen_intr.h> +#include <vm/vm.h> +#include <vm/pmap.h> +#include <machine/pmap.h> +#include <xen/hypervisor.h> +#include <machine/xen/xen-os.h> +#include <machine/xen/xenfunc.h> +#include <xen/interface/io/xenbus.h> +#include <xen/interface/vcpu.h> +#include <machine/cpu.h> + +#include <machine/xen/xen_clock_util.h> + +/* + * Read the current hypervisor start time (wall clock) from Xen. + */ +void +xen_fetch_wallclock(struct timespec *ts) +{ + shared_info_t *s = HYPERVISOR_shared_info; + uint32_t ts_version; + + do { + ts_version = s->wc_version; + rmb(); + ts->tv_sec = s->wc_sec; + ts->tv_nsec = s->wc_nsec; + rmb(); + } + while ((s->wc_version & 1) | (ts_version ^ s->wc_version)); +} + +/* + * Read the current hypervisor system uptime value from Xen. + */ +void +xen_fetch_uptime(struct timespec *ts) +{ + shared_info_t *s = HYPERVISOR_shared_info; + struct vcpu_time_info *src; + struct shadow_time_info dst; + uint32_t pre_version, post_version; + + src = &s->vcpu_info[smp_processor_id()].time; + + spinlock_enter(); + do { + pre_version = dst.version = src->version; + rmb(); + dst.system_timestamp = src->system_time; + rmb(); + post_version = src->version; + } + while ((pre_version & 1) | (pre_version ^ post_version)); + + spinlock_exit(); + + ts->tv_sec = dst.system_timestamp / 1000000000; + ts->tv_nsec = dst.system_timestamp % 1000000000; +} Modified: head/sys/i386/xen/xen_rtc.c ============================================================================== --- head/sys/i386/xen/xen_rtc.c Fri May 29 12:50:35 2009 (r193031) +++ head/sys/i386/xen/xen_rtc.c Fri May 29 13:36:06 2009 (r193032) @@ -50,56 +50,9 @@ __FBSDID("$FreeBSD$"); #include <xen/interface/vcpu.h> #include <machine/cpu.h> -#include "clock_if.h" - -/* - * Read the current hypervisor start time (wall clock) from Xen. - */ -static void -xen_fetch_wallclock(struct timespec *ts) -{ - shared_info_t *s = HYPERVISOR_shared_info; - uint32_t ts_version; - - do { - ts_version = s->wc_version; - rmb(); - ts->tv_sec = s->wc_sec; - ts->tv_nsec = s->wc_nsec; - rmb(); - } - while ((s->wc_version & 1) | (ts_version ^ s->wc_version)); -} - -/* - * Read the current hypervisor system uptime value from Xen. - */ -static void -xen_fetch_uptime(struct timespec *ts) -{ - shared_info_t *s = HYPERVISOR_shared_info; - struct vcpu_time_info *src; - struct shadow_time_info dst; - uint32_t pre_version, post_version; - - src = &s->vcpu_info[smp_processor_id()].time; - - spinlock_enter(); - do { - pre_version = dst.version = src->version; - rmb(); - dst.system_timestamp = src->system_time; - rmb(); - post_version = src->version; - } - while ((pre_version & 1) | (pre_version ^ post_version)); - - spinlock_exit(); - - ts->tv_sec = dst.system_timestamp / 1000000000; - ts->tv_nsec = dst.system_timestamp % 1000000000; -} +#include <machine/xen/xen_clock_util.h> +#include "clock_if.h" static int xen_rtc_probe(device_t dev)
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