ARM: Add I/O devices for booting linux

--HG--
rename : src/dev/arm/Versatile.py => src/dev/arm/RealView.py
rename : src/dev/arm/versatile.cc => src/dev/arm/realview.cc
rename : src/dev/arm/versatile.hh => src/dev/arm/realview.hh

1 files changed, 167 insertions, 0 deletions

diff --git a/src/dev/arm/timer_sp804.hh b/src/dev/arm/timer_sp804.hh
new file mode 100644
index 000000000..1039456ab
--- /dev/null
+++ b/src/dev/arm/timer_sp804.hh
@@ -0,0 +1,167 @@
+/*
+ * Copyright (c) 2010 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: Ali Saidi
+ */
+
+#ifndef __DEV_ARM_SP804_HH__
+#define __DEV_ARM_SP804_HH__
+
+#include "base/range.hh"
+#include "dev/arm/amba_device.hh"
+#include "params/Sp804.hh"
+
+/** @file
+ * This implements the dual Sp804 timer block
+ */
+
+class Gic;
+
+class Sp804 : public AmbaDevice
+{
+  protected:
+    class Timer
+    {
+
+      public:
+        enum {
+            LoadReg    = 0x00,
+            CurrentReg = 0x04,
+            ControlReg = 0x08,
+            IntClear   = 0x0C,
+            RawISR     = 0x10,
+            MaskedISR  = 0x14,
+            BGLoad     = 0x18,
+            Size       = 0x20
+        };
+
+        BitUnion32(CTRL)
+            Bitfield<0>   oneShot;
+            Bitfield<1>   timerSize;
+            Bitfield<3,2> timerPrescale;
+            Bitfield<5>   intEnable;
+            Bitfield<6>   timerMode;
+            Bitfield<7>   timerEnable;
+        EndBitUnion(CTRL)
+
+      protected:
+        std::string _name;
+
+        /** Pointer to parent class */
+        Sp804 *parent;
+
+        /** Number of interrupt to cause/clear */
+        uint32_t intNum;
+
+        /** Number of ticks in a clock input */
+        Tick clock;
+
+        /** Control register as specified above */
+        CTRL control;
+
+        /** If timer has caused an interrupt. This is irrespective of
+         * interrupt enable */
+        bool rawInt;
+
+        /** If an interrupt is currently pending. Logical and of CTRL.intEnable
+         * and rawInt */
+        bool pendingInt;
+
+        /** Value to load into counter when periodic mode reaches 0 */
+        uint32_t loadValue;
+
+        /** Called when the counter reaches 0 */
+        void counterAtZero();
+        EventWrapper<Timer, &Timer::counterAtZero> zeroEvent;
+
+      public:
+        /** Restart the counter ticking at val
+         * @param val the value to start at (pre-16 bit masking if en) */
+        void restartCounter(uint32_t val);
+
+        Timer(std::string __name, Sp804 *parent, int int_num, Tick clock);
+
+        std::string name() const { return _name; }
+
+        /** Handle read for a single timer */
+        void read(PacketPtr pkt, Addr daddr);
+
+        /** Handle write for a single timer */
+        void write(PacketPtr pkt, Addr daddr);
+    };
+
+    /** Pointer to the GIC for causing an interrupt */
+    Gic *gic;
+
+    /** Timers that do the actual work */
+    Timer timer0;
+    Timer timer1;
+
+  public:
+    typedef Sp804Params Params;
+    const Params *
+    params() const
+    {
+        return dynamic_cast<const Params *>(_params);
+    }
+    /**
+      * The constructor for RealView just registers itself with the MMU.
+      * @param p params structure
+      */
+    Sp804(Params *p);
+
+    /**
+     * Handle a read to the device
+     * @param pkt The memory request.
+     * @param data Where to put the data.
+     */
+    virtual Tick read(PacketPtr pkt);
+
+    /**
+     * All writes are simply ignored.
+     * @param pkt The memory request.
+     * @param data the data
+     */
+    virtual Tick write(PacketPtr pkt);
+
+
+    virtual void serialize(std::ostream &os);
+    virtual void unserialize(Checkpoint *cp, const std::string &section);
+};
+
+
+#endif // __DEV_ARM_SP804_HH__
+