syscall_emul: [patch 13/22] add system call retry capability

[gem5.git] / src / cpu / base.hh

diff --git a/src/cpu/base.hh b/src/cpu/base.hh
index 87f27accac675b2e379330e523c3b4990bd868c6..14dfc260bf434b2436c9a8002a51c5ad9b87e9d9 100644 (file)
--- a/src/cpu/base.hh
+++ b/src/cpu/base.hh
@@ -279,10 +279,11 @@ class BaseCPU : public MemObject
     Trace::InstTracer * getTracer() { return tracer; }
 
     /// Notify the CPU that the indicated context is now active.
-    virtual void activateContext(ThreadID thread_num) {}
+    virtual void activateContext(ThreadID thread_num);
 
     /// Notify the CPU that the indicated context is now suspended.
-    virtual void suspendContext(ThreadID thread_num) {}
+    /// Check if possible to enter a lower power state
+    virtual void suspendContext(ThreadID thread_num);
 
     /// Notify the CPU that the indicated context is now halted.
     virtual void haltContext(ThreadID thread_num) {}
@@ -296,6 +297,10 @@ class BaseCPU : public MemObject
    /// Get the number of thread contexts available
    unsigned numContexts() { return threadContexts.size(); }
 
+    /// Convert ContextID to threadID
+    ThreadID contextToThread(ContextID cid)
+    { return static_cast<ThreadID>(cid - threadContexts[0]->contextId()); }
+
   public:
     typedef BaseCPUParams Params;
     const Params *params() const
@@ -465,6 +470,15 @@ class BaseCPU : public MemObject
      */
     void scheduleLoadStop(ThreadID tid, Counter loads, const char *cause);
 
+    /**
+     * Get the number of instructions executed by the specified thread
+     * on this CPU. Used by Python to control simulation.
+     *
+     * @param tid Thread monitor
+     * @return Number of instructions executed
+     */
+    uint64_t getCurrentInstCount(ThreadID tid);
+
   public:
     /**
      * @{
@@ -574,6 +588,8 @@ class BaseCPU : public MemObject
         assert(tid < numThreads);
         return &addressMonitor[tid];
     }
+
+    Cycles syscallRetryLatency;
 };
 
 #endif // THE_ISA == NULL_ISA