diff options
Diffstat (limited to 'src/cpu/inorder/resource.hh')
| -rw-r--r-- | src/cpu/inorder/resource.hh | 411 |
1 files changed, 0 insertions, 411 deletions
diff --git a/src/cpu/inorder/resource.hh b/src/cpu/inorder/resource.hh deleted file mode 100644 index eaecc2824..000000000 --- a/src/cpu/inorder/resource.hh +++ /dev/null @@ -1,411 +0,0 @@ -/* - * 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_RESOURCE_HH__ -#define __CPU_INORDER_RESOURCE_HH__ - -#include <list> -#include <string> -#include <vector> - -#include "base/types.hh" -#include "cpu/inorder/inorder_dyn_inst.hh" -#include "cpu/inorder/pipeline_traits.hh" -#include "cpu/inst_seq.hh" -#include "sim/eventq.hh" -#include "sim/sim_object.hh" - -class Event; -class InOrderCPU; -class ResourceEvent; -class ResourceRequest; - -typedef ResourceRequest ResReq; -typedef ResourceRequest* ResReqPtr; - -class CacheRequest; -typedef CacheRequest* CacheReqPtr; - -class Resource { - public: - typedef ThePipeline::DynInstPtr DynInstPtr; - - friend class ResourceEvent; - friend class ResourceRequest; - - public: - Resource(std::string res_name, int res_id, int res_width, - Cycles res_latency, InOrderCPU *_cpu); - virtual ~Resource(); - - - /** Return name of this resource */ - virtual std::string name(); - - /** Return ID for this resource */ - int getId() { return id; } - - /** Any extra initiliazation stuff can be set up using this function that - * should get called before the simulation starts (tick 0) - */ - virtual void init(); - virtual void initSlots(); - - /** Register Stats for this resource */ - virtual void regStats() { } - - /** Resources that care about thread activation override this. */ - virtual void activateThread(ThreadID tid) { } - - /** Deactivate Thread. Default action is to squash all instructions - * from deactivated thread. - */ - virtual void deactivateThread(ThreadID tid); - - /** Resources that care about thread activation override this. */ - virtual void suspendThread(ThreadID tid) { } - - /** Will be called the cycle before a context switch. Any bookkeeping - * that needs to be kept for that, can be done here - */ - virtual void updateAfterContextSwitch(DynInstPtr inst, ThreadID tid) { } - - /** Resources that care when an instruction has been graduated - * can override this - */ - virtual void instGraduated(InstSeqNum seq_num, ThreadID tid) { } - - /** Post-processsing for Trap Generated from this instruction */ - virtual void trap(const Fault &fault, ThreadID tid, DynInstPtr inst) { } - - /** Request usage of this resource. Returns a ResourceRequest object - * with all the necessary resource information - */ - virtual ResourceRequest* request(DynInstPtr inst); - - /** Get the next available slot in this resource. Instruction is passed - * so that resources can check the instruction before allocating a slot - * if necessary. - */ - virtual int getSlot(DynInstPtr inst); - - /** Find the slot that this instruction is using in a resource */ - virtual int findSlot(DynInstPtr inst); - - /** Free a resource slot */ - virtual void freeSlot(int slot_idx); - - /** Request usage of a resource for this instruction. If this instruction - * already has made this request to this resource, and that request is - * uncompleted this function will just return that request - */ - virtual ResourceRequest* getRequest(DynInstPtr _inst, int stage_num, - int res_idx, int slot_num, - unsigned cmd); - - /** Schedule Execution of This Resource For A Given Slot*/ - void scheduleExecution(int slot_idx); - - /** Execute the function of this resource. The Default is action - * is to do nothing. More specific models will derive from this - * class and define their own execute function. - */ - virtual void execute(int slot_idx); - - /** Fetch on behalf of an instruction. Will check to see - * if instruction is actually in resource before - * trying to fetch. Needs to be defined for derived units. - */ - virtual Fault doFetchAccess(DynInstPtr inst) - { panic("doFetchAccess undefined for %s", name()); return NoFault; } - - /** Read/Write on behalf of an instruction. Will check to see - * if instruction is actually in resource before - * trying to do access.Needs to be defined for derived units. - */ - virtual void doCacheAccess(DynInstPtr inst, uint64_t *write_result = NULL, - CacheReqPtr split_req = NULL) - { panic("doCacheAccess undefined for %s", name()); } - - /** Setup Squash to be sent out to pipeline and resource pool */ - void setupSquash(DynInstPtr inst, int stage_num, ThreadID tid); - - /** Squash All Requests After This Seq Num */ - virtual void squash(DynInstPtr inst, int stage_num, - InstSeqNum squash_seq_num, ThreadID tid); - - /** Squash Requests Due to a Memory Stall (By Default, same as "squash" */ - virtual void squashDueToMemStall(DynInstPtr inst, int stage_num, - InstSeqNum squash_seq_num, ThreadID tid); - - /** Handle Squash & Trap that occured from an instruction in a resource */ - void squashThenTrap(int stage_num, DynInstPtr inst); - - /** The number of instructions available that this resource can - * can still process - */ - int slotsAvail(); - - /** The number of instructions using this resource */ - int slotsInUse(); - - /** Schedule resource event, regardless of its current state. */ - void scheduleEvent(int slot_idx, Cycles delay); - - /** Find instruction in list, Schedule resource event, regardless of its - * current state. */ - bool scheduleEvent(DynInstPtr inst, Cycles delay); - - /** Unschedule resource event, regardless of its current state. */ - void unscheduleEvent(int slot_idx); - - /** Unschedule resource event, regardless of its current state. */ - bool unscheduleEvent(DynInstPtr inst); - - /** Find the request that corresponds to this instruction */ - virtual ResReqPtr findRequest(DynInstPtr inst); - - /** */ - void rejectRequest(DynInstPtr inst); - - /** Request a Resource again. Some resources have to special process this - * in subsequent accesses. - */ - virtual void requestAgain(DynInstPtr inst, bool &try_request); - - /** Return Latency of Resource */ - /* Can be overridden for complex cases */ - virtual Cycles getLatency(int slot_num) { return latency; } - - protected: - /** The name of this resource */ - std::string resName; - - /** ID of the resource. The Resource Pool uses this # to identify this - * resource. - */ - int id; - - /** The number of instructions the resource can simultaneously - * process. - */ - int width; - - /** Constant latency for this resource. - * Note: Dynamic latency resources set this to 0 and - * manage the latency themselves - */ - const Cycles latency; - - public: - /** List of all Requests the Resource is Servicing. Each request - represents part of the resource's bandwidth - */ - std::vector<ResReqPtr> reqs; - - /** A list of all the available execution slots for this resource. - * This correlates with the actual resource event idx. - */ - std::vector<int> availSlots; - - /** The CPU(s) that this resource interacts with */ - InOrderCPU *cpu; - - protected: - /** The resource event used for scheduling resource slots on the - * event queue - */ - ResourceEvent *resourceEvent; - - /** Default denied resource request pointer*/ - ResReqPtr deniedReq; -}; - -class ResourceEvent : public Event -{ - public: - /** Pointer to the Resource this is an event for */ - Resource *resource; - - - /// Resource events that come before other associated CPU events - /// (for InOrderCPU model). - /// check src/sim/eventq.hh for more event priorities. - enum InOrderPriority { - Resource_Event_Pri = 45 - }; - - /** The Resource Slot that this event is servicing */ - int slotIdx; - - /** Constructs a resource event. */ - ResourceEvent(); - ResourceEvent(Resource *res, int slot_idx); - virtual ~ResourceEvent() { } - - /** Initialize data for this resource event. */ - virtual void init(Resource *res, int slot_idx); - - /** Processes a resource event. */ - virtual void process(); - - /** Returns the description of the resource event. */ - const char *description() const; - - /** Set slot idx for event */ - void setSlot(int slot) { slotIdx = slot; } - - /** Schedule resource event, regardless of its current state. */ - void scheduleEvent(Cycles delay); - - /** Unschedule resource event, regardless of its current state. */ - void unscheduleEvent() - { - if (scheduled()) - squash(); - } - -}; - -class ResourceRequest -{ - public: - typedef ThePipeline::DynInstPtr DynInstPtr; - - static int resReqID; - - static int maxReqCount; - - friend class Resource; - - public: - ResourceRequest(Resource *_res); - - virtual ~ResourceRequest(); - - std::string name(); - - int reqID; - - void setRequest(DynInstPtr _inst, int stage_num, - int res_idx, int slot_num, unsigned _cmd); - - virtual void clearRequest(); - - /** Acknowledge that this is a request is done and remove - * from resource. - */ - void done(bool completed = true); - - void freeSlot(); - - ///////////////////////////////////////////// - // - // GET RESOURCE REQUEST IDENTIFICATION / INFO - // - ///////////////////////////////////////////// - /** Get Resource Index */ - int getResIdx() { return resIdx; } - - /** Get Slot Number */ - int getSlot() { return slotNum; } - bool hasSlot() { return slotNum >= 0; } - - /** Get Stage Number */ - int getStageNum() { return stageNum; } - - /** Set/Get Thread Ids */ - void setTid(ThreadID _tid) { tid = _tid; } - ThreadID getTid() { return tid; } - - /** Instruction this request is for */ - DynInstPtr getInst() { return inst; } - - /** Data from this request. Overridden by Resource-Specific Request - * Objects - */ - virtual PacketDataPtr getData() { return NULL; } - - /** Pointer to Resource that is being used */ - Resource *res; - - /** Instruction being used */ - DynInstPtr inst; - - /** Not guaranteed to be set, used for debugging */ - InstSeqNum seqNum; - - /** Command For This Resource */ - unsigned cmd; - - short stagePasses; - - bool valid; - - bool doneInResource; - - //////////////////////////////////////// - // - // GET RESOURCE REQUEST STATUS FROM VARIABLES - // - //////////////////////////////////////// - /** Get/Set Completed variables */ - bool isCompleted() { return completed; } - void setCompleted(bool cond = true) { completed = cond; } - - /** Get/Set Squashed variables */ - bool isSquashed() { return squashed; } - void setSquashed() { squashed = true; } - - /** Get/Set IsProcessing variables */ - bool isProcessing() { return processing; } - void setProcessing(bool cond = true) { processing = cond; } - - /** Get/Set IsWaiting variables */ - bool isMemStall() { return memStall; } - void setMemStall(bool stall = true) { memStall = stall; } - - protected: - /** Resource Identification */ - ThreadID tid; - int stageNum; - int resIdx; - int slotNum; - - /** Resource Request Status */ - bool completed; - bool squashed; - bool processing; - - bool memStall; -}; - -#endif //__CPU_INORDER_RESOURCE_HH__ |