Adding gem5 source to svn.

git-svn-id: https://www4.informatik.uni-erlangen.de/i4svn/danceos/trunk/devel/fail@1819 8c4709b5-6ec9-48aa-a5cd-a96041d1645a

simulators/gem5/src/sim/vptr.hh

@@ -0,0 +1,137 @@
+/*
+ * 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: Nathan Binkert
+ */
+
+#ifndef __ARCH_ALPHA_VPTR_HH__
+#define __ARCH_ALPHA_VPTR_HH__
+
+#include "arch/isa_traits.hh"
+#include "arch/vtophys.hh"
+#include "mem/fs_translating_port_proxy.hh"
+
+class ThreadContext;
+
+template <class T>
+class VPtr
+{
+  public:
+    typedef T Type;
+
+  protected:
+    ThreadContext *tc;
+    Addr ptr;
+    Addr buffer[(sizeof(T)-1)/sizeof(Addr) + 1];
+
+  public:
+    explicit VPtr(ThreadContext *_tc, Addr p = 0)
+        : tc(_tc), ptr(p)
+    {
+        refresh();
+    }
+
+    template <class U>
+    VPtr(const VPtr<U> &vp)
+        : tc(vp.tc), ptr(vp.ptr)
+    {
+        refresh();
+    }
+
+    ~VPtr()
+    {}
+
+    void
+    refresh()
+    {
+        if (!ptr)
+            return;
+
+        FSTranslatingPortProxy &proxy = tc->getVirtProxy();
+        proxy.readBlob(ptr, buffer, sizeof(T));
+    }
+
+    bool
+    operator!() const
+    {
+        return ptr == 0;
+    }
+
+    VPtr<T>
+    operator+(int offset)
+    {
+        return VPtr<T>(tc, ptr + offset);
+    }
+
+    const VPtr<T> &
+    operator+=(int offset)
+    {
+        ptr += offset;
+        refresh();
+
+        return *this;
+    }
+
+    const VPtr<T> &
+    operator=(Addr p)
+    {
+        ptr = p;
+        refresh();
+
+        return *this;
+    }
+
+    template <class U>
+    const VPtr<T> &
+    operator=(const VPtr<U> &vp)
+    {
+        tc = vp.tc;
+        ptr = vp.ptr;
+        refresh();
+
+        return *this;
+    }
+
+    operator T *()
+    {
+        return (T *)buffer;
+    }
+
+    T *
+    operator->()
+    {
+        return (T *)buffer;
+    }
+
+    T &
+    operator*()
+    {
+        return *(T *)buffer;
+    }
+};
+
+#endif // __ARCH_ALPHA_VPTR_HH__