8 files changed, 28 insertions, 14 deletions

diff --git a/cpu/base_cpu.cc b/cpu/base_cpu.cc
index 74e57baa6..9d94c575c 100644
--- a/cpu/base_cpu.cc
+++ b/cpu/base_cpu.cc
@@ -51,11 +51,12 @@ int maxThreadsPerCPU = 1;
 
 #ifdef FULL_SYSTEM
 BaseCPU::BaseCPU(Params *p)
-    : SimObject(p->name), frequency(p->freq), checkInterrupts(true),
+    : SimObject(p->name), cycleTime(p->cycleTime), checkInterrupts(true),
       params(p), number_of_threads(p->numberOfThreads), system(p->system)
 #else
 BaseCPU::BaseCPU(Params *p)
-    : SimObject(p->name), params(p), number_of_threads(p->numberOfThreads)
+    : SimObject(p->name), cycleTime(p->cycleTime), params(p),
+      number_of_threads(p->numberOfThreads)
 #endif
 {
     // add self to global list of CPUs
diff --git a/cpu/base_cpu.hh b/cpu/base_cpu.hh
index f346f4ec5..ea12460db 100644
--- a/cpu/base_cpu.hh
+++ b/cpu/base_cpu.hh
@@ -46,9 +46,17 @@ class ExecContext;
 
 class BaseCPU : public SimObject
 {
+  protected:
+    // CPU's clock period in terms of the number of ticks of curTime.
+    Tick cycleTime;
+
+  public:
+    inline Tick frequency() const { return Clock::Frequency / cycleTime; }
+    inline Tick cycles(int numCycles) const { return cycleTime * numCycles; }
+    inline Tick curCycle() const { return curTick / cycleTime; }
+
 #ifdef FULL_SYSTEM
   protected:
-    Tick frequency;
     uint64_t interrupts[NumInterruptLevels];
     uint64_t intstatus;
 
@@ -67,8 +75,6 @@ class BaseCPU : public SimObject
 
     bool check_interrupts() const { return intstatus != 0; }
     uint64_t intr_status() const { return intstatus; }
-
-    Tick getFreq() const { return frequency; }
 #endif
 
   protected:
@@ -100,7 +106,7 @@ class BaseCPU : public SimObject
         Counter max_insts_all_threads;
         Counter max_loads_any_thread;
         Counter max_loads_all_threads;
-        Tick freq;
+        Tick cycleTime;
         bool functionTrace;
         Tick functionTraceStart;
 #ifdef FULL_SYSTEM
diff --git a/cpu/memtest/memtest.cc b/cpu/memtest/memtest.cc
index 14b119880..86d03e162 100644
--- a/cpu/memtest/memtest.cc
+++ b/cpu/memtest/memtest.cc
@@ -225,7 +225,7 @@ void
 MemTest::tick()
 {
     if (!tickEvent.scheduled())
-        tickEvent.schedule(curTick + 1);
+        tickEvent.schedule(curTick + cycles(1));
 
     if (++noResponseCycles >= 500000) {
         cerr << name() << ": deadlocked at cycle " << curTick << endl;
diff --git a/cpu/memtest/memtest.hh b/cpu/memtest/memtest.hh
index 45b2d24e8..ed25cf374 100644
--- a/cpu/memtest/memtest.hh
+++ b/cpu/memtest/memtest.hh
@@ -60,6 +60,9 @@ class MemTest : public SimObject
 
     // register statistics
     virtual void regStats();
+
+    inline Tick cycles(int numCycles) const { return numCycles; }
+
     // main simulation loop (one cycle)
     void tick();
 
diff --git a/cpu/simple_cpu/simple_cpu.cc b/cpu/simple_cpu/simple_cpu.cc
index 6a95a52c2..719768bf1 100644
--- a/cpu/simple_cpu/simple_cpu.cc
+++ b/cpu/simple_cpu/simple_cpu.cc
@@ -809,7 +809,7 @@ SimpleCPU::tick()
            status() == DcacheMissStall);
 
     if (status() == Running && !tickEvent.scheduled())
-        tickEvent.schedule(curTick + 1);
+        tickEvent.schedule(curTick + cycles(1));
 }
 
 
@@ -834,6 +834,7 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(SimpleCPU)
     SimObjectParam<Process *> workload;
 #endif // FULL_SYSTEM
 
+    Param<int> cycle_time;
     SimObjectParam<BaseMem *> icache;
     SimObjectParam<BaseMem *> dcache;
 
@@ -865,6 +866,7 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(SimpleCPU)
     INIT_PARAM(workload, "processes to run"),
 #endif // FULL_SYSTEM
 
+    INIT_PARAM(cycle_time, "cpu cycle time"),
     INIT_PARAM(icache, "L1 instruction cache object"),
     INIT_PARAM(dcache, "L1 data cache object"),
     INIT_PARAM(defer_registration, "defer system registration (for sampling)"),
@@ -890,7 +892,7 @@ CREATE_SIM_OBJECT(SimpleCPU)
     params->max_loads_any_thread = max_loads_any_thread;
     params->max_loads_all_threads = max_loads_all_threads;
     params->deferRegistration = defer_registration;
-    params->freq = ticksPerSecond;
+    params->cycleTime = cycle_time;
     params->functionTrace = function_trace;
     params->functionTraceStart = function_trace_start;
     params->icache_interface = (icache) ? icache->getInterface() : NULL;
diff --git a/cpu/simple_cpu/simple_cpu.hh b/cpu/simple_cpu/simple_cpu.hh
index f245a7bba..2056ff707 100644
--- a/cpu/simple_cpu/simple_cpu.hh
+++ b/cpu/simple_cpu/simple_cpu.hh
@@ -80,12 +80,12 @@ class SimpleCPU : public BaseCPU
     TickEvent tickEvent;
 
     /// Schedule tick event, regardless of its current state.
-    void scheduleTickEvent(int delay)
+    void scheduleTickEvent(int numCycles)
     {
         if (tickEvent.squashed())
-            tickEvent.reschedule(curTick + delay);
+            tickEvent.reschedule(curTick + cycles(numCycles));
         else if (!tickEvent.scheduled())
-            tickEvent.schedule(curTick + delay);
+            tickEvent.schedule(curTick + cycles(numCycles));
     }
 
     /// Unschedule tick event, regardless of its current state.
diff --git a/cpu/trace/trace_cpu.cc b/cpu/trace/trace_cpu.cc
index 1902d0be4..a0e4ef24c 100644
--- a/cpu/trace/trace_cpu.cc
+++ b/cpu/trace/trace_cpu.cc
@@ -108,10 +108,10 @@ TraceCPU::tick()
         if (mainEventQueue.empty()) {
             new SimExitEvent("Finshed Memory Trace");
         } else {
-            tickEvent.schedule(mainEventQueue.nextEventTime() + 1);
+            tickEvent.schedule(mainEventQueue.nextEventTime() + cycles(1));
         }
     } else {
-        tickEvent.schedule(max(curTick + 1, nextCycle));
+        tickEvent.schedule(max(curTick + cycles(1), nextCycle));
     }
 }
 
diff --git a/cpu/trace/trace_cpu.hh b/cpu/trace/trace_cpu.hh
index cdac4bb4f..9b80e325d 100644
--- a/cpu/trace/trace_cpu.hh
+++ b/cpu/trace/trace_cpu.hh
@@ -105,6 +105,8 @@ class TraceCPU : public SimObject
              MemInterface *dcache_interface,
              MemTraceReader *data_trace);
 
+    inline Tick cycles(int numCycles) { return numCycles; }
+
     /**
      * Perform all the accesses for one cycle.
      */