1 files changed, 112 insertions, 0 deletions
diff --git a/src/cpu/kvm/timer.cc b/src/cpu/kvm/timer.cc
new file mode 100644
index 000000000..059d70f6b
--- /dev/null
+++ b/src/cpu/kvm/timer.cc
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2012 ARM Limited
+ * All rights reserved
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder.  You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * 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;
+ * neither the name of the copyright holders 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 COPYRIGHT HOLDERS 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 COPYRIGHT
+ * OWNER 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.
+ *
+ * Authors: Andreas Sandberg
+ */
+
+#include <csignal>
+#include <ctime>
+
+#include "base/misc.hh"
+#include "base/trace.hh"
+#include "cpu/kvm/timer.hh"
+#include "debug/KvmTimer.hh"
+
+
+PosixKvmTimer::PosixKvmTimer(int signo, clockid_t clockID,
+                             float hostFactor, Tick hostFreq)
+    : BaseKvmTimer(signo, hostFactor, hostFreq),
+      clockID(clockID)
+{
+    struct sigevent sev;
+
+    // TODO: We should request signal delivery to thread instead of
+    // the process here. Unfortunately this seems to be broken, or at
+    // least not work as specified in the man page.
+    sev.sigev_notify = SIGEV_SIGNAL;
+    sev.sigev_signo = signo;
+    sev.sigev_value.sival_ptr = NULL;
+    if (timer_create(clockID, &sev, &timer) == -1)
+        panic("timer_create");
+}
+
+PosixKvmTimer::~PosixKvmTimer()
+{
+    timer_delete(timer);
+}
+
+void
+PosixKvmTimer::arm(Tick ticks)
+{
+    struct itimerspec ts;
+    memset(&ts, 0, sizeof(ts));
+
+    ts.it_interval.tv_sec = 0;
+    ts.it_interval.tv_nsec = 0;
+    ts.it_value.tv_sec = hostNs(ticks) / 1000000000ULL;
+    ts.it_value.tv_nsec = hostNs(ticks) % 1000000000ULL;
+
+    DPRINTF(KvmTimer, "Arming POSIX timer: %i ticks (%is%ins)\n",
+            ticks, ts.it_value.tv_sec, ts.it_value.tv_nsec);
+
+    if (timer_settime(timer, 0, &ts, NULL) == -1)
+        panic("PosixKvmTimer: Failed to arm timer\n");
+}
+
+void
+PosixKvmTimer::disarm()
+{
+    struct itimerspec ts;
+    memset(&ts, 0, sizeof(ts));
+
+    DPRINTF(KvmTimer, "Disarming POSIX timer\n");
+
+    if (timer_settime(timer, 0, &ts, NULL) == -1)
+        panic("PosixKvmTimer: Failed to disarm timer\n");
+}
+
+Tick
+PosixKvmTimer::calcResolution()
+{
+    struct timespec ts;
+
+    if (clock_getres(clockID, &ts) == -1)
+        panic("PosixKvmTimer: Failed to get timer resolution\n");
+
+    Tick resolution(ticksFromHostNs(ts.tv_sec * 1000000000ULL + ts.tv_nsec));
+
+    return resolution;
+}