Current Path : /sys/i386/xen/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/i386/xen/xen_rtc.c |
/*- * 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: release/9.1.0/sys/i386/xen/xen_rtc.c 193032 2009-05-29 13:36:06Z adrian $ */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/i386/xen/xen_rtc.c 193032 2009-05-29 13:36:06Z adrian $"); #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> #include "clock_if.h" static int xen_rtc_probe(device_t dev) { device_set_desc(dev, "Xen Hypervisor Clock"); printf("[XEN] xen_rtc_probe: probing Hypervisor RTC clock\n"); if (! HYPERVISOR_shared_info) { device_printf(dev, "No hypervisor shared page found; RTC can not start.\n"); return (EINVAL); } return (0); } static int xen_rtc_attach(device_t dev) { printf("[XEN] xen_rtc_attach: attaching Hypervisor RTC clock\n"); clock_register(dev, 1000000); return(0); } static int xen_rtc_settime(device_t dev __unused, struct timespec *ts) { device_printf(dev, "[XEN] xen_rtc_settime\n"); /* * Don't return EINVAL here; just silently fail if the domain isn't privileged enough * to set the TOD. */ return(0); } /* * The Xen time structures document the hypervisor start time and the * uptime-since-hypervisor-start (in nsec.) They need to be combined * in order to calculate a TOD clock. */ static int xen_rtc_gettime(device_t dev, struct timespec *ts) { struct timespec w_ts, u_ts; device_printf(dev, "[XEN] xen_rtc_gettime\n"); xen_fetch_wallclock(&w_ts); device_printf(dev, "[XEN] xen_rtc_gettime: wallclock %ld sec; %ld nsec\n", (long int) w_ts.tv_sec, (long int) w_ts.tv_nsec); xen_fetch_uptime(&u_ts); device_printf(dev, "[XEN] xen_rtc_gettime: uptime %ld sec; %ld nsec\n", (long int) u_ts.tv_sec, (long int) u_ts.tv_nsec); timespecclear(ts); timespecadd(ts, &w_ts); timespecadd(ts, &u_ts); device_printf(dev, "[XEN] xen_rtc_gettime: TOD %ld sec; %ld nsec\n", (long int) ts->tv_sec, (long int) ts->tv_nsec); return(0); } static void xen_rtc_identify(driver_t *drv, device_t parent) { BUS_ADD_CHILD(parent, 0, "rtc", 0); } static device_method_t xen_rtc_methods[] = { /* Device interface */ DEVMETHOD(device_probe, xen_rtc_probe), DEVMETHOD(device_attach, xen_rtc_attach), DEVMETHOD(device_identify, xen_rtc_identify), DEVMETHOD(device_detach, bus_generic_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), /* clock interface */ DEVMETHOD(clock_gettime, xen_rtc_gettime), DEVMETHOD(clock_settime, xen_rtc_settime), { 0, 0 } }; static driver_t xen_rtc_driver = { "rtc", xen_rtc_methods, 0 }; static devclass_t xen_rtc_devclass; DRIVER_MODULE(rtc, nexus, xen_rtc_driver, xen_rtc_devclass, 0, 0);