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+/*
+ * Copyright (c) 2004-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * 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: Gabe Black
+ */
+
+#ifndef __DEV_X86_SOUTH_BRIDGE_CMOS_HH__
+#define __DEV_X86_SOUTH_BRIDGE_CMOS_HH__
+
+#include "arch/x86/x86_traits.hh"
+#include "base/range.hh"
+#include "dev/mc146818.hh"
+#include "dev/x86/south_bridge/sub_device.hh"
+
+namespace X86ISA
+{
+
+class Cmos : public SubDevice
+{
+  protected:
+    uint8_t address;
+
+    struct tm foo_time;
+
+    static const int numRegs = 128;
+
+    uint8_t regs[numRegs];
+
+    uint8_t readRegister(uint8_t reg);
+    void writeRegister(uint8_t reg, uint8_t val);
+
+    class X86RTC : public MC146818
+    {
+      public:
+        X86RTC(const std::string &n, const struct tm time,
+                bool bcd, Tick frequency) : MC146818(n, time, bcd, frequency)
+        {
+        }
+      protected:
+        void handleEvent()
+        {
+            return;
+        }
+    } rtc;
+
+  public:
+
+    Cmos() : rtc("rtc", foo_time, true, 5000000000)
+    {
+        memset(regs, 0, numRegs * sizeof(uint8_t));
+        address = 0;
+    }
+
+    Cmos(Tick _latency) : SubDevice(_latency),
+        rtc("rtc", foo_time, true, 5000000000)
+    {
+        memset(regs, 0, numRegs * sizeof(uint8_t));
+        address = 0;
+    }
+
+    Cmos(Addr start, Addr size, Tick _latency) :
+        SubDevice(start, size, _latency),
+        rtc("rtc", foo_time, true, 5000000000)
+    {
+        memset(regs, 0, numRegs * sizeof(uint8_t));
+        address = 0;
+    }
+
+    Tick read(PacketPtr pkt);
+
+    Tick write(PacketPtr pkt);
+};
+
+}; // namespace X86ISA
+
+#endif //__DEV_X86_SOUTH_BRIDGE_CMOS_HH__