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Diffstat (limited to 'src/cpu/o3/ras.hh')
-rw-r--r-- | src/cpu/o3/ras.hh | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/src/cpu/o3/ras.hh b/src/cpu/o3/ras.hh deleted file mode 100644 index a36faf79a..000000000 --- a/src/cpu/o3/ras.hh +++ /dev/null @@ -1,100 +0,0 @@ -/* - * 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: Kevin Lim - */ - -#ifndef __CPU_O3_RAS_HH__ -#define __CPU_O3_RAS_HH__ - -#include <vector> - -#include "base/types.hh" - -/** 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); - - bool empty() { return usedEntries == 0; } - - bool full() { return usedEntries == numEntries; } - 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__ |