Migrate the Xen hypervisor clock reading routines into something

sharable.

3 files changed, 141 insertions, 49 deletions

diff --git a/sys/i386/include/xen/xen_clock_util.h b/sys/i386/include/xen/xen_clock_util.h
new file mode 100644
index 0000000..d28b2dc
--- /dev/null
+++ b/sys/i386/include/xen/xen_clock_util.h
@@ -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__ */
diff --git a/sys/i386/xen/xen_clock_util.c b/sys/i386/xen/xen_clock_util.c
new file mode 100644
index 0000000..c14a627
--- /dev/null
+++ b/sys/i386/xen/xen_clock_util.c
@@ -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;
+}
diff --git a/sys/i386/xen/xen_rtc.c b/sys/i386/xen/xen_rtc.c
index cf04f85..8e1e017 100644
--- a/sys/i386/xen/xen_rtc.c
+++ b/sys/i386/xen/xen_rtc.c
@@ -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)