SimX timing simulation

sim/simX/exeunit.h

@@ -0,0 +1,103 @@
+#pragma once
+
+#include <simobject.h>
+#include "pipeline.h"
+#include "cache.h"
+
+namespace vortex {
+
+class Core;
+
+class ExeUnit {
+protected:
+    const char* name_;
+    Queue<pipeline_state_t> inputs_;
+    Queue<pipeline_state_t> outputs_;
+
+    void schedule_output(const pipeline_state_t& state, uint32_t delay) {
+        if (delay > 1) {
+            SimPlatform::instance().schedule(
+                [&](const pipeline_state_t& req) { 
+                    outputs_.push(req); 
+                },
+                state,
+                (delay - 1)
+            );
+        } else {
+            outputs_.push(state);
+        }
+    }
+
+public:    
+    typedef std::shared_ptr<ExeUnit> Ptr;
+
+    ExeUnit(const char* name) : name_(name) {}
+    
+    virtual ~ExeUnit() {}
+
+    void push_input(const pipeline_state_t& state) {
+        inputs_.push(state);
+    }
+
+    bool pop_output(pipeline_state_t* state) {
+        return outputs_.try_pop(state);
+    }
+
+    virtual void step() = 0;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+class LsuUnit : public ExeUnit {
+private:
+    Core* core_;
+    uint32_t num_threads_;
+    HashTable<std::pair<pipeline_state_t, ThreadMask>> pending_dcache_;
+    pipeline_state_t fence_state_;
+    bool fence_lock_;
+
+public:
+    LsuUnit(Core*);
+
+    void handleCacheReponse(const MemRsp& response, uint32_t port_id);
+
+    void step();
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+class AluUnit : public ExeUnit {
+public:
+    AluUnit(Core*);
+    
+    void step();
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+class CsrUnit : public ExeUnit {
+public:
+    CsrUnit(Core*);
+    
+    void step();
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+class FpuUnit : public ExeUnit {
+public:
+    FpuUnit(Core*);
+    
+    void step();
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+class GpuUnit : public ExeUnit {
+public:
+    GpuUnit(Core*);
+    
+    void step();
+};
+
+}