#ifndef __CPU_INORDER_RESOURCE_HH__
#define __CPU_INORDER_RESOURCE_HH__
-#include <vector>
#include <list>
#include <string>
+#include <vector>
#include "base/types.hh"
-#include "cpu/inst_seq.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"
typedef ResourceRequest ResReq;
typedef ResourceRequest* ResReqPtr;
+class CacheRequest;
+typedef CacheRequest* CacheReqPtr;
+
class Resource {
public:
typedef ThePipeline::DynInstPtr DynInstPtr;
/** Return name of this resource */
virtual std::string name();
- /** Define this function if resource, has a port to connect to an outside
- * simulation object.
- */
- virtual Port* getPort(const std::string &if_name, int idx) { return NULL; }
-
/** Return ID for this resource */
int getId() { return id; }
virtual void initSlots();
/** Register Stats for this resource */
- virtual void regStats();
+ virtual void regStats() { }
/** Resources that care about thread activation override this. */
virtual void activateThread(ThreadID tid) { }
*/
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(Fault fault, ThreadID tid, DynInstPtr inst) { }
+
/** Request usage of this resource. Returns a ResourceRequest object
* with all the necessary resource information
*/
/** 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
+ /** 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*/
- virtual void scheduleExecution(int slot_idx);
+ 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
* if instruction is actually in resource before
* trying to do access.Needs to be defined for derived units.
*/
- virtual Fault doCacheAccess(DynInstPtr inst, uint64_t *res=NULL)
- { panic("doCacheAccess undefined for %s", name()); return NoFault; }
+ virtual void doCacheAccess(DynInstPtr inst, uint64_t *write_result = NULL,
+ CacheReqPtr split_req = NULL)
+ { panic("doCacheAccess undefined for %s", name()); }
- virtual void prefetch(DynInstPtr inst)
- { panic("prefetch undefined for %s", name()); }
-
- virtual void writeHint(DynInstPtr inst)
- { panic("writeHint 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
*/
/** Schedule resource event, regardless of its current state. */
void scheduleEvent(int slot_idx, int delay);
- /** Find instruction in list, Schedule resource event, regardless of its current state. */
+ /** Find instruction in list, Schedule resource event, regardless of its
+ * current state. */
bool scheduleEvent(DynInstPtr inst, int delay);
/** Unschedule resource event, regardless of its current state. */
virtual ResReqPtr findRequest(DynInstPtr inst);
/** */
- virtual void rejectRequest(DynInstPtr inst);
+ void rejectRequest(DynInstPtr inst);
/** Request a Resource again. Some resources have to special process this
* in subsequent accesses.
const int latency;
public:
- /** Mapping of slot-numbers to the resource-request pointers */
- std::map<int, ResReqPtr> reqMap;
+ /** 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.
/** Default denied resource request pointer*/
ResReqPtr deniedReq;
-
- public:
- /////////////////////////////////////////////////////////////////
- //
- // DEFAULT RESOURCE STATISTICS
- //
- /////////////////////////////////////////////////////////////////
- /** Number of Instruction Requests the Resource Processes */
- Stats::Scalar instReqsProcessed;
};
class ResourceEvent : public Event
{
public:
- /** Pointer to the CPU. */
+ /** Pointer to the Resource this is an event for */
Resource *resource;
/// (for InOrderCPU model).
/// check src/sim/eventq.hh for more event priorities.
enum InOrderPriority {
- Resource_Event_Pri = 45,
+ Resource_Event_Pri = 45
};
/** The Resource Slot that this event is servicing */
virtual void process();
/** Returns the description of the resource event. */
- const char *description();
+ 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(int delay)
- {
- if (squashed())
- mainEventQueue.reschedule(this, curTick + resource->ticks(delay));
- else if (!scheduled())
- mainEventQueue.schedule(this, curTick + resource->ticks(delay));
- }
+ void scheduleEvent(int delay);
/** Unschedule resource event, regardless of its current state. */
void unscheduleEvent()
static int resReqID;
- static int resReqCount;
+ static int maxReqCount;
+
+ friend class Resource;
public:
- ResourceRequest(Resource *_res, DynInstPtr _inst, int stage_num,
- int res_idx, int slot_num, unsigned _cmd)
- : res(_res), inst(_inst), cmd(_cmd), stageNum(stage_num),
- resIdx(res_idx), slotNum(slot_num), completed(false),
- squashed(false), processing(false), waiting(false)
- {
- reqID = resReqID++;
- resReqCount++;
- DPRINTF(ResReqCount, "Res. Req %i created. resReqCount=%i.\n", reqID, resReqCount);
+ ResourceRequest(Resource *_res);
+
+ virtual ~ResourceRequest();
- if (resReqCount > 100) {
- fatal("Too many undeleted resource requests. Memory leak?\n");
- }
- }
+ std::string name();
+
+ int reqID;
- virtual ~ResourceRequest()
- {
- resReqCount--;
- DPRINTF(ResReqCount, "Res. Req %i deleted. resReqCount=%i.\n", reqID, resReqCount);
- }
+ void setRequest(DynInstPtr _inst, int stage_num,
+ int res_idx, int slot_num, unsigned _cmd);
- int reqID;
+ virtual void clearRequest();
/** Acknowledge that this is a request is done and remove
* from resource.
*/
void done(bool completed = true);
+
+ void freeSlot();
/////////////////////////////////////////////
//
/////////////////////////////////////////////
/** 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; }
/** Instruction being used */
DynInstPtr inst;
- /** Fault Associated With This Resource Request */
- Fault fault;
-
+ /** 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 IsProcessing variables */
bool isProcessing() { return processing; }
- void setProcessing() { processing = true; }
+ void setProcessing(bool cond = true) { processing = cond; }
/** Get/Set IsWaiting variables */
- bool isWaiting() { return waiting; }
- void setWaiting() { waiting = true; }
+ bool isMemStall() { return memStall; }
+ void setMemStall(bool stall = true) { memStall = stall; }
protected:
/** Resource Identification */
int stageNum;
int resIdx;
int slotNum;
-
- /** Resource Status */
+
+ /** Resource Request Status */
bool completed;
bool squashed;
bool processing;
- bool waiting;
+
+ bool memStall;
};
#endif //__CPU_INORDER_RESOURCE_HH__
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