Makefile_1mb_fixed

# Makefile for SHA256 1MB Processor Fixed Simulation

# Verilator settings
VERILATOR = verilator
VERILATOR_FLAGS = -Wall -Wno-WIDTHTRUNC -Wno-WIDTHEXPAND -Wno-UNSIGNED -Wno-EOFNEWLINE -Wno-DECLFILENAME -Wno-UNUSEDPARAM -Wno-INFINITELOOP --no-timing --cc --exe --build --trace

# Source files
VERILOG_SOURCES = sha256_1mb_processor_fixed.v
CPP_SOURCES = sha256_1mb_sim_main_fixed.cpp

# Output executable
EXECUTABLE = sha256_1mb_sim_fixed

# Default target
all: $(EXECUTABLE)

# Build the fixed 1MB simulation
$(EXECUTABLE): $(VERILOG_SOURCES) $(CPP_SOURCES)
	@echo "Building SHA256 1MB processor fixed simulation..."
	$(VERILATOR) $(VERILATOR_FLAGS) -top-module sha256_1mb_processor_fixed \
		$(VERILOG_SOURCES) $(CPP_SOURCES) -o $(EXECUTABLE)
	@echo "Build complete!"

# Run the fixed 1MB simulation
run: $(EXECUTABLE)
	@echo "Running SHA256 1MB processor fixed simulation..."
	@echo "This will process all 2049 blocks and may take several minutes..."
	./$(EXECUTABLE)

# Generate expected hash for verification
verify:
	@echo "Generating expected SHA256 hash for 1MB incrementing data..."
	@python3 -c "import hashlib; data = bytes(i % 256 for i in range(1048576)); hash_result = hashlib.sha256(data).hexdigest(); print(f'Expected SHA256 hash: {hash_result}')"

# Quick test (first few blocks only)
quick: $(EXECUTABLE)
	@echo "Running quick test of SHA256 1MB processor..."
	@echo "Note: This will timeout early to test basic functionality"
	timeout 30s ./$(EXECUTABLE) || echo "Quick test completed (timeout expected)"

# View waveform
wave:
	@if [ -f sha256_1mb_fixed_waveform.vcd ]; then \
		echo "Opening waveform viewer..."; \
		gtkwave sha256_1mb_fixed_waveform.vcd; \
	else \
		echo "No waveform file found. Run 'make run' first."; \
	fi

# Clean build artifacts
clean:
	@echo "Cleaning build artifacts..."
	rm -rf obj_dir
	rm -f $(EXECUTABLE)
	rm -f *.vcd
	rm -f *.fst

# Show status
status:
	@echo "=== SHA256 1MB Processor Fixed Status ==="
	@echo "Source files:"
	@ls -la $(VERILOG_SOURCES) $(CPP_SOURCES) 2>/dev/null || echo "  Some source files missing"
	@echo ""
	@echo "Build artifacts:"
	@ls -la $(EXECUTABLE) 2>/dev/null || echo "  Executable not built yet"
	@ls -la *.vcd 2>/dev/null || echo "  No waveform files"
	@echo ""
	@echo "Available targets:"
	@echo "  all     - Build the simulation"
	@echo "  run     - Run full 1MB simulation (may take several minutes)"
	@echo "  quick   - Run quick test (30 second timeout)"
	@echo "  verify  - Generate expected hash for verification"
	@echo "  wave    - View waveform (requires gtkwave)"
	@echo "  clean   - Clean all build artifacts"
	@echo "  status  - Show this status"

# Performance estimate
estimate:
	@echo "=== Performance Estimate ==="
	@echo "1MB = 1,048,576 bytes = 2048 data blocks + 1 padding block = 2049 total blocks"
	@echo "Each block takes ~100 cycles to process"
	@echo "Total estimated cycles: 2049 * 100 = 204,900 cycles"
	@echo "At 100MHz: ~2.05ms processing time"
	@echo "Simulation time units: ~409,800 (2 time units per cycle)"
	@echo ""
	@echo "Note: Actual simulation may be slower due to overhead"

.PHONY: all run verify quick wave clean status estimate