diff options
Diffstat (limited to 'src/cpu/inorder/resources/use_def.hh')
-rw-r--r-- | src/cpu/inorder/resources/use_def.hh | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/src/cpu/inorder/resources/use_def.hh b/src/cpu/inorder/resources/use_def.hh new file mode 100644 index 000000000..238591117 --- /dev/null +++ b/src/cpu/inorder/resources/use_def.hh @@ -0,0 +1,102 @@ +/* + * Copyright (c) 2007 MIPS Technologies, Inc. + * 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: Korey Sewell + * + */ + +#ifndef __CPU_INORDER_USE_DEF_UNIT_HH__ +#define __CPU_INORDER_USE_DEF_UNIT_HH__ + +#include <vector> +#include <list> +#include <string> + +#include "cpu/func_unit.hh" +#include "cpu/inorder/first_stage.hh" +#include "cpu/inorder/resource.hh" +#include "cpu/inorder/inorder_dyn_inst.hh" +#include "cpu/inorder/pipeline_traits.hh" +#include "cpu/inorder/reg_dep_map.hh" + +class UseDefUnit : public Resource { + public: + typedef ThePipeline::DynInstPtr DynInstPtr; + + enum Command { + ReadSrcReg, + WriteDestReg + }; + + public: + UseDefUnit(std::string res_name, int res_id, int res_width, + int res_latency, InOrderCPU *_cpu, ThePipeline::Params *params); + virtual ~UseDefUnit() {} + + virtual ResourceRequest* getRequest(DynInstPtr _inst, int stage_num, + int res_idx, int slot_num, + unsigned cmd); + + virtual ResReqPtr findRequest(DynInstPtr inst); + + virtual void execute(int slot_num); + + virtual void squash(DynInstPtr inst, int stage_num, InstSeqNum squash_seq_num, unsigned tid); + + const InstSeqNum maxSeqNum; + + protected: + RegDepMap *regDepMap[ThePipeline::MaxThreads]; + + /** Outstanding Seq. Num. Trying to Read from Register File */ + InstSeqNum outReadSeqNum[ThePipeline::MaxThreads]; + + InstSeqNum outWriteSeqNum[ThePipeline::MaxThreads]; + + bool *nonSpecInstActive[ThePipeline::MaxThreads]; + + InstSeqNum *nonSpecSeqNum[ThePipeline::MaxThreads]; + + /** @todo: Add Resource Stats Here */ + + public: + class UseDefRequest : public ResourceRequest { + public: + typedef ThePipeline::DynInstPtr DynInstPtr; + + public: + UseDefRequest(UseDefUnit *res, DynInstPtr inst, int stage_num, int res_idx, + int slot_num, unsigned cmd, int use_def_idx) + : ResourceRequest(res, inst, stage_num, res_idx, slot_num, cmd), + useDefIdx(use_def_idx) + { } + + int useDefIdx; + }; +}; + +#endif //__CPU_INORDER_USE_DEF_UNIT_HH__ |