From e5bdae15f3651d8f0fc63e483e73e8ea742135e3 Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Tue, 25 Mar 2008 02:15:06 -0400
Subject: Devices: Separate out the MC146818 RTC so both Alpha and X86 can use
 it.

--HG--
extra : convert_revision : 1e7f5185654ed0845678c2169c702d3b977159ed
---
 src/dev/mc146818.hh | 128 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 src/dev/mc146818.hh

(limited to 'src/dev/mc146818.hh')

diff --git a/src/dev/mc146818.hh b/src/dev/mc146818.hh
new file mode 100644
index 000000000..f91e462d9
--- /dev/null
+++ b/src/dev/mc146818.hh
@@ -0,0 +1,128 @@
+/*
+ * 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: Ali Saidi
+ *          Andrew Schultz
+ *          Miguel Serrano
+ */
+
+#ifndef __DEV_MC146818_HH__
+#define __DEV_MC146818_HH__
+
+#include "base/range.hh"
+#include "sim/eventq.hh"
+
+/** Real-Time Clock (MC146818) */
+class MC146818
+{
+  protected:
+    virtual void handleEvent()
+    {
+        warn("No RTC event handler defined.\n");
+    }
+
+  private:
+    /** Event for RTC periodic interrupt */
+    struct RTCEvent : public Event
+    {
+        MC146818 * parent;
+        Tick interval;
+
+        RTCEvent(MC146818 * _parent, Tick i);
+
+        /** Schedule the RTC periodic interrupt */
+        void scheduleIntr();
+
+        /** Event process to occur at interrupt*/
+        virtual void process();
+
+        /** Event description */
+        virtual const char *description() const;
+    };
+
+  private:
+    std::string _name;
+    const std::string &name() const { return _name; }
+
+    /** RTC periodic interrupt event */
+    RTCEvent event;
+
+    /** Data for real-time clock function */
+    union {
+        uint8_t clock_data[10];
+
+        struct {
+            uint8_t sec;
+            uint8_t sec_alrm;
+            uint8_t min;
+            uint8_t min_alrm;
+            uint8_t hour;
+            uint8_t hour_alrm;
+            uint8_t wday;
+            uint8_t mday;
+            uint8_t mon;
+            uint8_t year;
+        };
+    };
+
+    /** RTC status register A */
+    uint8_t stat_regA;
+
+    /** RTC status register B */
+    uint8_t stat_regB;
+
+  public:
+    virtual ~MC146818()
+    {}
+
+    MC146818(const std::string &name, const struct tm time,
+            bool bcd, Tick frequency);
+
+    /** RTC write data */
+    void writeData(const uint8_t addr, const uint8_t data);
+
+    /** RTC read data */
+    uint8_t readData(const uint8_t addr);
+
+    /**
+      * Serialize this object to the given output stream.
+      * @param base The base name of the counter object.
+      * @param os The stream to serialize to.
+      */
+    void serialize(const std::string &base, std::ostream &os);
+
+    /**
+     * Reconstruct the state of this object from a checkpoint.
+     * @param base The base name of the counter object.
+     * @param cp The checkpoint use.
+     * @param section The section name of this object
+     */
+    void unserialize(const std::string &base, Checkpoint *cp,
+                     const std::string &section);
+};
+
+#endif // __DEV_MC146818_HH__
-- 
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