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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 __CPU_O3_CPU_RAS_HH__
-#define __CPU_O3_CPU_RAS_HH__
-
-// For Addr type.
-#include "arch/isa_traits.hh"
-
-class ReturnAddrStack
-{
- public:
- ReturnAddrStack(unsigned numEntries);
-
- Addr top()
- { return addrStack[tos]; }
-
- unsigned topIdx()
- { return tos; }
-
- void push(const Addr &return_addr);
-
- void pop();
-
- void restore(unsigned top_entry_idx, const Addr &restored_target);
-
- private:
- inline void incrTos()
- { if (++tos == numEntries) tos = 0; }
-
- inline void decrTos()
- { tos = (tos == 0 ? numEntries - 1 : tos - 1); }
-
- Addr *addrStack;
-
- unsigned numEntries;
-
- unsigned usedEntries;
-
- unsigned tos;
-};
-
-#endif // __CPU_O3_CPU_RAS_HH__