/*
- * Copyright (c) 2011 ARM Limited
+ * Copyright (c) 2011-2012 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
#include <vector>
+#include "arch/interrupts.hh"
#include "arch/isa_traits.hh"
#include "arch/microcode_rom.hh"
#include "base/statistics.hh"
-#include "config/full_system.hh"
#include "config/the_isa.hh"
#include "mem/mem_object.hh"
#include "sim/eventq.hh"
+#include "sim/full_system.hh"
#include "sim/insttracer.hh"
-#if FULL_SYSTEM
-#include "arch/interrupts.hh"
-#endif
-
-class BaseCPUParams;
+struct BaseCPUParams;
class BranchPred;
class CheckerCPU;
class ThreadContext;
class System;
-class Port;
-
-namespace TheISA
-{
- class Predecoder;
-}
class CPUProgressEvent : public Event
{
class BaseCPU : public MemObject
{
protected:
- // CPU's clock period in terms of the number of ticks of curTime.
- Tick clock;
+
// @todo remove me after debugging with legion done
Tick instCnt;
// every cpu has an id, put it in the base cpu
// therefore no setCpuId() method is provided
int _cpuId;
+ /** instruction side request id that must be placed in all requests */
+ MasterID _instMasterId;
+
+ /** data side request id that must be placed in all requests */
+ MasterID _dataMasterId;
+
+ /** An intrenal representation of a task identifier within gem5. This is
+ * used so the CPU can add which taskId (which is an internal representation
+ * of the OS process ID) to each request so components in the memory system
+ * can track which process IDs are ultimately interacting with them
+ */
+ uint32_t _taskId;
+
+ /** The current OS process ID that is executing on this processor. This is
+ * used to generate a taskId */
+ uint32_t _pid;
+
+ /** Is the CPU switched out or active? */
+ bool _switchedOut;
+
/**
* Define a base class for the CPU ports (instruction and data)
* that is refined in the subclasses. This class handles the
* both atomic and timing access is to panic and the corresponding
* subclasses have to override these methods.
*/
- class CpuPort : public Port
+ class CpuPort : public MasterPort
{
public:
* @param _name structural owner of this port
*/
CpuPort(const std::string& _name, MemObject* _owner) :
- Port(_name, _owner), snoopRangeSent(false)
+ MasterPort(_name, _owner)
{ }
protected:
- virtual bool recvTiming(PacketPtr pkt);
-
- virtual Tick recvAtomic(PacketPtr pkt);
+ virtual bool recvTimingResp(PacketPtr pkt);
virtual void recvRetry();
- void recvFunctional(PacketPtr pkt);
-
- void recvStatusChange(Status status);
+ virtual void recvFunctionalSnoop(PacketPtr pkt);
- /**
- * Add CPU ports are master ports and do not respond to any
- * address ranges. Note that the LSQ snoops for specific ISAs
- * and thus has to override this method.
- *
- * @param resp list of ranges this port responds to
- * @param snoop indicating if the port snoops or not
- */
- virtual void getDeviceAddressRanges(AddrRangeList& resp,
- bool& snoop);
+ };
- private:
+ public:
- bool snoopRangeSent;
+ /**
+ * Purely virtual method that returns a reference to the data
+ * port. All subclasses must implement this method.
+ *
+ * @return a reference to the data port
+ */
+ virtual CpuPort &getDataPort() = 0;
- };
+ /**
+ * Purely virtual method that returns a reference to the instruction
+ * port. All subclasses must implement this method.
+ *
+ * @return a reference to the instruction port
+ */
+ virtual CpuPort &getInstPort() = 0;
- public:
/** Reads this CPU's ID. */
int cpuId() { return _cpuId; }
-// Tick currentTick;
- inline Tick frequency() const { return SimClock::Frequency / clock; }
- inline Tick ticks(int numCycles) const { return clock * numCycles; }
- inline Tick curCycle() const { return curTick() / clock; }
- inline Tick tickToCycles(Tick val) const { return val / clock; }
+ /** Reads this CPU's unique data requestor ID */
+ MasterID dataMasterId() { return _dataMasterId; }
+ /** Reads this CPU's unique instruction requestor ID */
+ MasterID instMasterId() { return _instMasterId; }
+
+ /**
+ * Get a master port on this CPU. All CPUs have a data and
+ * instruction port, and this method uses getDataPort and
+ * getInstPort of the subclasses to resolve the two ports.
+ *
+ * @param if_name the port name
+ * @param idx ignored index
+ *
+ * @return a reference to the port with the given name
+ */
+ BaseMasterPort &getMasterPort(const std::string &if_name,
+ PortID idx = InvalidPortID);
+
+ /** Get cpu task id */
+ uint32_t taskId() const { return _taskId; }
+ /** Set cpu task id */
+ void taskId(uint32_t id) { _taskId = id; }
+
+ uint32_t getPid() const { return _pid; }
+ void setPid(uint32_t pid) { _pid = pid; }
+
inline void workItemBegin() { numWorkItemsStarted++; }
inline void workItemEnd() { numWorkItemsCompleted++; }
// @todo remove me after debugging with legion done
Tick instCount() { return instCnt; }
- /** The next cycle the CPU should be scheduled, given a cache
- * access or quiesce event returning on this cycle. This function
- * may return curTick() if the CPU should run on the current cycle.
- */
- Tick nextCycle();
-
- /** The next cycle the CPU should be scheduled, given a cache
- * access or quiesce event returning on the given Tick. This
- * function may return curTick() if the CPU should run on the
- * current cycle.
- * @param begin_tick The tick that the event is completing on.
- */
- Tick nextCycle(Tick begin_tick);
-
TheISA::MicrocodeRom microcodeRom;
-#if FULL_SYSTEM
protected:
TheISA::Interrupts *interrupts;
postInterrupt(int int_num, int index)
{
interrupts->post(int_num, index);
- wakeup();
+ if (FullSystem)
+ wakeup();
}
void
bool
checkInterrupts(ThreadContext *tc) const
{
- return interrupts->checkInterrupts(tc);
+ return FullSystem && interrupts->checkInterrupts(tc);
}
class ProfileEvent : public Event
void process();
};
ProfileEvent *profileEvent;
-#endif
protected:
std::vector<ThreadContext *> threadContexts;
- std::vector<TheISA::Predecoder *> predecoders;
Trace::InstTracer * tracer;
/// Notify the CPU that the indicated context is now active. The
/// delay parameter indicates the number of ticks to wait before
/// executing (typically 0 or 1).
- virtual void activateContext(int thread_num, int delay) {}
+ virtual void activateContext(ThreadID thread_num, Cycles delay) {}
/// Notify the CPU that the indicated context is now suspended.
- virtual void suspendContext(int thread_num) {}
+ virtual void suspendContext(ThreadID thread_num) {}
/// Notify the CPU that the indicated context is now deallocated.
- virtual void deallocateContext(int thread_num) {}
+ virtual void deallocateContext(ThreadID thread_num) {}
/// Notify the CPU that the indicated context is now halted.
- virtual void haltContext(int thread_num) {}
+ virtual void haltContext(ThreadID thread_num) {}
/// Given a Thread Context pointer return the thread num
int findContext(ThreadContext *tc);
typedef BaseCPUParams Params;
const Params *params() const
{ return reinterpret_cast<const Params *>(_params); }
- BaseCPU(Params *params);
+ BaseCPU(Params *params, bool is_checker = false);
virtual ~BaseCPU();
virtual void init();
void registerThreadContexts();
- /// Prepare for another CPU to take over execution. When it is
- /// is ready (drained pipe) it signals the sampler.
+ /**
+ * Prepare for another CPU to take over execution.
+ *
+ * When this method exits, all internal state should have been
+ * flushed. After the method returns, the simulator calls
+ * takeOverFrom() on the new CPU with this CPU as its parameter.
+ */
virtual void switchOut();
- /// Take over execution from the given CPU. Used for warm-up and
- /// sampling.
- virtual void takeOverFrom(BaseCPU *, Port *ic, Port *dc);
+ /**
+ * Load the state of a CPU from the previous CPU object, invoked
+ * on all new CPUs that are about to be switched in.
+ *
+ * A CPU model implementing this method is expected to initialize
+ * its state from the old CPU and connect its memory (unless they
+ * are already connected) to the memories connected to the old
+ * CPU.
+ *
+ * @param cpu CPU to initialize read state from.
+ */
+ virtual void takeOverFrom(BaseCPU *cpu);
+
+ /**
+ * Flush all TLBs in the CPU.
+ *
+ * This method is mainly used to flush stale translations when
+ * switching CPUs. It is also exported to the Python world to
+ * allow it to request a TLB flush after draining the CPU to make
+ * it easier to compare traces when debugging
+ * handover/checkpointing.
+ */
+ void flushTLBs();
+
+ /**
+ * Determine if the CPU is switched out.
+ *
+ * @return True if the CPU is switched out, false otherwise.
+ */
+ bool switchedOut() const { return _switchedOut; }
/**
* Number of threads we're actually simulating (<= SMT_MAX_THREADS).
System *system;
- Tick phase;
-
-#if FULL_SYSTEM
/**
* Serialize this object to the given output stream.
* @param os The stream to serialize to.
*/
virtual void unserialize(Checkpoint *cp, const std::string §ion);
-#endif
-
/**
* Return pointer to CPU's branch predictor (NULL if none).
* @return Branch predictor pointer.
*/
virtual BranchPred *getBranchPred() { return NULL; };
- virtual Counter totalInstructions() const = 0;
+ virtual Counter totalInsts() const = 0;
+
+ virtual Counter totalOps() const = 0;
// Function tracing
private:
}
static int numSimulatedCPUs() { return cpuList.size(); }
- static Counter numSimulatedInstructions()
+ static Counter numSimulatedInsts()
+ {
+ Counter total = 0;
+
+ int size = cpuList.size();
+ for (int i = 0; i < size; ++i)
+ total += cpuList[i]->totalInsts();
+
+ return total;
+ }
+
+ static Counter numSimulatedOps()
{
Counter total = 0;
int size = cpuList.size();
for (int i = 0; i < size; ++i)
- total += cpuList[i]->totalInstructions();
+ total += cpuList[i]->totalOps();
return total;
}
projects / gem5.git / blobdiff