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Diffstat (limited to 'src/mem/simple_mem.hh')
-rw-r--r-- | src/mem/simple_mem.hh | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/mem/simple_mem.hh b/src/mem/simple_mem.hh new file mode 100644 index 000000000..b21b38fd8 --- /dev/null +++ b/src/mem/simple_mem.hh @@ -0,0 +1,114 @@ +/* + * Copyright (c) 2012 ARM Limited + * All rights reserved + * + * The license below extends only to copyright in the software and shall + * not be construed as granting a license to any other intellectual + * property including but not limited to intellectual property relating + * to a hardware implementation of the functionality of the software + * licensed hereunder. You may use the software subject to the license + * terms below provided that you ensure that this notice is replicated + * unmodified and in its entirety in all distributions of the software, + * modified or unmodified, in source code or in binary form. + * + * Copyright (c) 2001-2005 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: Ron Dreslinski + * Andreas Hansson + */ + +/** + * @file + * SimpleMemory declaration + */ + +#ifndef __SIMPLE_MEMORY_HH__ +#define __SIMPLE_MEMORY_HH__ + +#include "mem/abstract_mem.hh" +#include "mem/tport.hh" +#include "params/SimpleMemory.hh" + +/** + * The simple memory is a basic multi-ported memory with an infinite + * throughput and a fixed latency, potentially with a variance added + * to it. It uses a SimpleTimingPort to implement the timing accesses. + */ +class SimpleMemory : public AbstractMemory +{ + + private: + + class MemoryPort : public SimpleTimingPort + { + SimpleMemory& memory; + + public: + + MemoryPort(const std::string& _name, SimpleMemory& _memory); + + protected: + + virtual Tick recvAtomic(PacketPtr pkt); + + virtual void recvFunctional(PacketPtr pkt); + + virtual AddrRangeList getAddrRanges(); + + }; + + std::vector<MemoryPort*> ports; + + Tick lat; + Tick lat_var; + + public: + + typedef SimpleMemoryParams Params; + SimpleMemory(const Params *p); + virtual ~SimpleMemory() { } + + unsigned int drain(Event* de); + + virtual SlavePort& getSlavePort(const std::string& if_name, int idx = -1); + virtual void init(); + + const Params * + params() const + { + return dynamic_cast<const Params *>(_params); + } + + protected: + + Tick doAtomicAccess(PacketPtr pkt); + void doFunctionalAccess(PacketPtr pkt); + virtual Tick calculateLatency(PacketPtr pkt); + +}; + +#endif //__SIMPLE_MEMORY_HH__ |