diff options
Diffstat (limited to 'src/cpu/inorder/first_stage.hh')
-rw-r--r-- | src/cpu/inorder/first_stage.hh | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/cpu/inorder/first_stage.hh b/src/cpu/inorder/first_stage.hh new file mode 100644 index 000000000..55914c85c --- /dev/null +++ b/src/cpu/inorder/first_stage.hh @@ -0,0 +1,97 @@ +/* + * 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_FIRST_STAGE_HH__ +#define __CPU_INORDER_FIRST_STAGE_HH__ + +#include <queue> +#include <vector> + +#include "base/statistics.hh" +#include "base/timebuf.hh" +#include "cpu/inorder/inorder_dyn_inst.hh" +#include "cpu/inorder/comm.hh" +#include "cpu/inorder/params.hh" +#include "cpu/inorder/pipeline_traits.hh" +#include "cpu/inorder/pipeline_stage.hh" + +class InOrderCPU; + +class FirstStage : public PipelineStage { + public: + FirstStage(ThePipeline::Params *params, unsigned stage_num); + + /** Set Pointer to CPU */ + void setCPU(InOrderCPU *cpu_ptr); + + /** Evaluate Stage Info. & Execute Stage */ + void processStage(bool &status_change); + + /** Process All Instructions Available */ + void processInsts(unsigned tid); + + /** Squash Instructions Above a Seq. Num */ + void squash(InstSeqNum squash_seq_num, unsigned tid); + + /** There are no insts. coming from previous stages, so there is + * no need to sort insts here + */ + void sortInsts() {} + + /** There are no skidBuffers for the first stage. So + * just use an empty function. + */ + void skidInsert(unsigned tid) { } + + /** The number of fetching threads in the CPU */ + int numFetchingThreads; + + //@TODO: Add fetch priority information to a resource class... + /** Fetching Policy, Add new policies here.*/ + enum FetchPriority { + SingleThread, + RoundRobin + }; + + /** Fetch policy. */ + FetchPriority fetchPolicy; + + /** List that has the threads organized by priority. */ + std::list<unsigned> *fetchPriorityList; + + /** Return the next fetching thread */ + int getFetchingThread(FetchPriority &fetch_priority); + + /** Return next thred given Round Robin Policy for Thread Fetching */ + int roundRobin(); +}; + +#endif // __CPU_INORDER_FIRST_STAGE_HH__ |