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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.
- */
-
-#ifndef __ARCH_ALPHA_VPTR_HH__
-#define __ARCH_ALPHA_VPTR_HH__
-
-#include "arch/vtophys.hh"
-#include "arch/isa_traits.hh"
-
-class ExecContext;
-
-template <class T>
-class VPtr
-{
- public:
- typedef T Type;
-
- private:
- ExecContext *xc;
- Addr ptr;
-
- public:
- ExecContext *GetXC() const { return xc; }
- Addr GetPointer() const { return ptr; }
-
- public:
- explicit VPtr(ExecContext *_xc, Addr p = 0) : xc(_xc), ptr(p) { }
- template <class U>
- VPtr(const VPtr<U> &vp) : xc(vp.GetXC()), ptr(vp.GetPointer()) {}
- ~VPtr() {}
-
- bool operator!() const
- {
- return ptr == 0;
- }
-
- VPtr<T> operator+(int offset)
- {
- VPtr<T> ptr(*this);
- ptr += offset;
-
- return ptr;
- }
-
- const VPtr<T> &operator+=(int offset)
- {
- ptr += offset;
- assert((ptr & (TheISA::PageBytes - 1)) + sizeof(T)
- < TheISA::PageBytes);
-
- return *this;
- }
-
- const VPtr<T> &operator=(Addr p)
- {
- assert((p & (TheISA::PageBytes - 1)) + sizeof(T)
- < TheISA::PageBytes);
- ptr = p;
-
- return *this;
- }
-
- template <class U>
- const VPtr<T> &operator=(const VPtr<U> &vp)
- {
- xc = vp.GetXC();
- ptr = vp.GetPointer();
-
- return *this;
- }
-
- operator T *()
- {
- void *addr = vtomem(xc, ptr, sizeof(T));
- return (T *)addr;
- }
-
- T *operator->()
- {
- void *addr = vtomem(xc, ptr, sizeof(T));
- return (T *)addr;
- }
-
- T &operator*()
- {
- void *addr = vtomem(xc, ptr, sizeof(T));
- return *(T *)addr;
- }
-};
-
-#endif // __ARCH_ALPHA_VPTR_HH__