f3358e5f7b
cpu/o3/2bit_local_pred.cc:
cpu/o3/2bit_local_pred.hh:
cpu/o3/bpred_unit.hh:
cpu/o3/bpred_unit_impl.hh:
cpu/o3/btb.cc:
cpu/o3/btb.hh:
cpu/o3/commit.hh:
cpu/o3/commit_impl.hh:
cpu/o3/cpu.cc:
cpu/o3/cpu.hh:
cpu/o3/decode.hh:
cpu/o3/decode_impl.hh:
cpu/o3/fetch.hh:
cpu/o3/fetch_impl.hh:
cpu/o3/fu_pool.cc:
cpu/o3/fu_pool.hh:
cpu/o3/iew.hh:
cpu/o3/iew_impl.hh:
cpu/o3/inst_queue.hh:
cpu/o3/inst_queue_impl.hh:
cpu/o3/lsq.hh:
cpu/o3/lsq_impl.hh:
cpu/o3/lsq_unit.hh:
cpu/o3/lsq_unit_impl.hh:
cpu/o3/mem_dep_unit.hh:
cpu/o3/mem_dep_unit_impl.hh:
cpu/o3/ras.cc:
cpu/o3/ras.hh:
cpu/o3/rename.hh:
cpu/o3/rename_impl.hh:
cpu/o3/rob.hh:
cpu/o3/rob_impl.hh:
cpu/o3/sat_counter.cc:
cpu/o3/sat_counter.hh:
cpu/o3/thread_state.hh:
Handle switching out and taking over. Needs to be able to reset all state.
cpu/o3/alpha_cpu_impl.hh:
Handle taking over from another XC.
--HG--
extra : convert_revision : b936e826f0f8a18319bfa940ff35097b4192b449
96 lines
3.2 KiB
C++
96 lines
3.2 KiB
C++
/*
|
|
* 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_RAS_HH__
|
|
#define __CPU_O3_RAS_HH__
|
|
|
|
// For Addr type.
|
|
#include "arch/isa_traits.hh"
|
|
#include <vector>
|
|
|
|
/** Return address stack class, implements a simple RAS. */
|
|
class ReturnAddrStack
|
|
{
|
|
public:
|
|
/** Creates a return address stack, but init() must be called prior to
|
|
* use.
|
|
*/
|
|
ReturnAddrStack() {}
|
|
|
|
/** Initializes RAS with a specified number of entries.
|
|
* @param numEntries Number of entries in the RAS.
|
|
*/
|
|
void init(unsigned numEntries);
|
|
|
|
void reset();
|
|
|
|
/** Returns the top address on the RAS. */
|
|
Addr top()
|
|
{ return addrStack[tos]; }
|
|
|
|
/** Returns the index of the top of the RAS. */
|
|
unsigned topIdx()
|
|
{ return tos; }
|
|
|
|
/** Pushes an address onto the RAS. */
|
|
void push(const Addr &return_addr);
|
|
|
|
/** Pops the top address from the RAS. */
|
|
void pop();
|
|
|
|
/** Changes index to the top of the RAS, and replaces the top address with
|
|
* a new target.
|
|
* @param top_entry_idx The index of the RAS that will now be the top.
|
|
* @param restored_target The new target address of the new top of the RAS.
|
|
*/
|
|
void restore(unsigned top_entry_idx, const Addr &restored_target);
|
|
|
|
private:
|
|
/** Increments the top of stack index. */
|
|
inline void incrTos()
|
|
{ if (++tos == numEntries) tos = 0; }
|
|
|
|
/** Decrements the top of stack index. */
|
|
inline void decrTos()
|
|
{ tos = (tos == 0 ? numEntries - 1 : tos - 1); }
|
|
|
|
/** The RAS itself. */
|
|
std::vector<Addr> addrStack;
|
|
|
|
/** The number of entries in the RAS. */
|
|
unsigned numEntries;
|
|
|
|
/** The number of used entries in the RAS. */
|
|
unsigned usedEntries;
|
|
|
|
/** The top of stack index. */
|
|
unsigned tos;
|
|
};
|
|
|
|
#endif // __CPU_O3_RAS_HH__
|