Makefile_1mb

# Makefile for SHA256 1MB Processor 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.v
CPP_SOURCES = sha256_1mb_sim_main.cpp
CPP_QUICK_SOURCES = sha256_1mb_sim_main_quick.cpp

# Output executable
EXECUTABLE = sha256_1mb_sim
EXECUTABLE_QUICK = sha256_1mb_sim_quick

# Default target
all: $(EXECUTABLE)

# Build the 1MB simulation
$(EXECUTABLE): $(VERILOG_SOURCES) $(CPP_SOURCES)
	@echo "Building SHA256 1MB processor simulation..."
	$(VERILATOR) $(VERILATOR_FLAGS) -top-module sha256_1mb_processor \
		$(VERILOG_SOURCES) $(CPP_SOURCES) -o $(EXECUTABLE)
	@echo "Build complete!"

# Build the quick test simulation
$(EXECUTABLE_QUICK): $(VERILOG_SOURCES) $(CPP_QUICK_SOURCES)
	@echo "Building SHA256 1MB processor quick test..."
	$(VERILATOR) $(VERILATOR_FLAGS) -top-module sha256_1mb_processor \
		$(VERILOG_SOURCES) $(CPP_QUICK_SOURCES) -o $(EXECUTABLE_QUICK)
	@echo "Quick test build complete!"

# Run the 1MB simulation
run: $(EXECUTABLE)
	@echo "Running SHA256 1MB processor simulation..."
	@echo "WARNING: This will process 1MB of data and may take several minutes..."
	./obj_dir/$(EXECUTABLE)
	@echo "Simulation complete!"

# Run quick test
quick: $(EXECUTABLE_QUICK)
	@echo "Running SHA256 1MB processor quick test..."
	./obj_dir/$(EXECUTABLE_QUICK)
	@echo "Quick test complete!"

# Generate expected hash for verification
verify:
	@echo "Generating expected SHA256 hash for 1MB verification..."
	@python3 -c "import hashlib; data = bytes(range(256)) * 4096; print('Expected SHA256:', hashlib.sha256(data).hexdigest())"

# Quick test with smaller data for verification
test-small:
	@echo "Testing with smaller data pattern..."
	@python3 -c "import hashlib; data = bytes(range(256)) * 4; print('1KB pattern SHA256:', hashlib.sha256(data).hexdigest())"

# View waveform (requires GTKWave)
wave:
	@if [ -f sha256_1mb_waveform.vcd ]; then \
		echo "Opening waveform in GTKWave..."; \
		gtkwave sha256_1mb_waveform.vcd; \
	elif [ -f sha256_1mb_quick_waveform.vcd ]; then \
		echo "Opening quick test waveform in GTKWave..."; \
		gtkwave sha256_1mb_quick_waveform.vcd; \
	else \
		echo "No waveform file found. Run 'make quick' or 'make run' first."; \
	fi

# Clean build artifacts
clean:
	rm -rf obj_dir/
	rm -f sha256_1mb_waveform.vcd sha256_1mb_quick_waveform.vcd
	@echo "Clean complete!"

# Performance estimation
estimate:
	@echo "Performance Estimation for 1MB SHA256 Processing:"
	@echo "- Data size: 1MB = 1,048,576 bytes"
	@echo "- Number of blocks: 2049 (2048 data + 1 padding)"
	@echo "- Cycles per block: ~80 (64 compression + 16 setup)"
	@echo "- Estimated total cycles: ~164,000"
	@echo "- At 100MHz: ~1.64ms processing time"
	@echo "- Estimated throughput: ~640 MB/s"

# Help
help:
	@echo "Available targets:"
	@echo "  all        - Build the 1MB simulation (default)"
	@echo "  run        - Build and run the 1MB simulation"
	@echo "  quick      - Build and run quick test (recommended first)"
	@echo "  verify     - Generate expected SHA256 hash for 1MB"
	@echo "  test-small - Test with 1KB pattern for quick verification"
	@echo "  estimate   - Show performance estimates"
	@echo "  wave       - View waveform in GTKWave"
	@echo "  clean      - Clean build artifacts"
	@echo "  help       - Show this help message"

.PHONY: all run quick verify test-small estimate wave clean help