83 lines
2.2 KiB
Java
83 lines
2.2 KiB
Java
package processor.pipeline;
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import generic.Element;
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import generic.Event;
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import generic.ExecutionCompleteEvent;
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import generic.Instruction;
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import generic.MemoryReadEvent;
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import generic.MemoryResponseEvent;
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import generic.MemoryWriteEvent;
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import generic.Simulator;
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import processor.Clock;
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import processor.Processor;
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import generic.Instruction.OperationType;
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public class MemoryAccess implements Element {
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Processor containingProcessor;
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EX_MA_LatchType EX_MA_Latch;
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MA_RW_LatchType MA_RW_Latch;
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public MemoryAccess(Processor containingProcessor, EX_MA_LatchType eX_MA_Latch, MA_RW_LatchType mA_RW_Latch)
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{
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this.containingProcessor = containingProcessor;
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this.EX_MA_Latch = eX_MA_Latch;
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this.MA_RW_Latch = mA_RW_Latch;
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}
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public void performMA()
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{
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if(EX_MA_Latch.isMA_enable()&& !EX_MA_Latch.isMA_busy())
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{
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Instruction instruction = EX_MA_Latch.getInstruction();
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int alu_result = EX_MA_Latch.getALUResult();
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MA_RW_Latch.setALU_result(alu_result);
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OperationType op_type = instruction.getOperationType();
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MA_RW_Latch.setInstruction(instruction);
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MA_RW_Latch.setRW_enable(true);
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if (op_type==OperationType.store)
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{
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int val_store = containingProcessor.getRegisterFile().getValue(
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instruction.getSourceOperand1().getValue());
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Simulator.getEventQueue().addEvent(
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new MemoryWriteEvent(
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Clock.getCurrentTime()+containingProcessor.getL1dCache().latency,
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this,
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containingProcessor.getL1dCache(),
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alu_result,
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val_store
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)
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);
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EX_MA_Latch.setMA_busy(true);
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MA_RW_Latch.setRW_enable(false);
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}
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else if (op_type==OperationType.load)
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{
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Simulator.getEventQueue().addEvent(
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new MemoryReadEvent(
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Clock.getCurrentTime()+containingProcessor.getL1dCache().latency,
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this,
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containingProcessor.getL1dCache(),
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alu_result
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)
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);
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EX_MA_Latch.setMA_busy(true);
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MA_RW_Latch.setRW_enable(false);
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}
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}
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}
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@Override
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public void handleEvent(Event e) {
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if(e instanceof ExecutionCompleteEvent) {
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EX_MA_Latch.setMA_busy(false);
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MA_RW_Latch.setRW_enable(true);
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return;
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}
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MemoryResponseEvent event=(MemoryResponseEvent) e;
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MA_RW_Latch.setLoad_result(event.getValue());
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MA_RW_Latch.setRW_enable(true);
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}
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}
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