From 3aca2967a35d05dac3d9121a882d608b10a588bb Mon Sep 17 00:00:00 2001
From: Alejandro Soto <alejandro@34project.org>
Date: Sun, 16 Oct 2022 16:01:47 -0600
Subject: Implement simulation testbenches

---
 Makefile | 40 +++++++++++++++++++++++++++++++++-------
 1 file changed, 33 insertions(+), 7 deletions(-)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index d30e6cb..0a55b3d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,15 +1,21 @@
-TOP       := conspiracion
-VCD_DIR   := vcd
-OBJ_DIR   := obj
-RTL_DIR   := rtl
-TB_DIR    := tb
-VERILATOR := verilator
+TOP           := conspiracion
+VCD_DIR       := vcd
+OBJ_DIR       := obj
+RTL_DIR       := rtl
+TB_DIR        := tb
+SIM_DIR       := $(TB_DIR)/sim
+SIM_OBJ_DIR   := $(OBJ_DIR)/$(TOP)/sim
+VERILATOR     := verilator
+CROSS_CC      := arm-none-eabi-gcc
+CROSS_OBJCOPY := arm-none-eabi-objcopy
+CROSS_CFLAGS  := -O3 -Wall -Wextra -Werror
+CROSS_LDFLAGS :=
 
 RTL_FILES  = $(shell find $(RTL_DIR)/ ! -path '$(RTL_DIR)/top/*' -type f -name '*.sv')
 RTL_FILES += $(shell find $(TB_DIR)/ ! -path '$(TB_DIR)/top/*' -type f -name '*.sv')
 TB_FILES   = $(shell find $(TB_DIR)/ ! -path '$(TB_DIR)/top/*' -type f -name '*.cpp')
 
-all: trace
+all: sim
 
 clean:
 	rm -rf $(OBJ_DIR) $(VCD_DIR)
@@ -22,11 +28,31 @@ trace/%: exe/% $(VCD_DIR)/%
 $(VCD_DIR)/%:
 	mkdir -p $@
 
+sim: $(patsubst $(SIM_DIR)/%.py,sim/%,$(filter-out $(SIM_DIR)/sim.py,$(wildcard $(SIM_DIR)/*.py)))
+
+sim/%: $(SIM_DIR)/sim.py $(SIM_DIR)/%.py $(OBJ_DIR)/$(TOP)/V$(TOP) $(SIM_OBJ_DIR)/%.bin
+	$^
+
+$(SIM_OBJ_DIR)/%.bin: $(SIM_OBJ_DIR)/%
+	$(CROSS_OBJCOPY) -O binary --only-section=._img $< $@
+
+$(SIM_OBJ_DIR)/%: $(SIM_OBJ_DIR)/%.o $(SIM_OBJ_DIR)/start.o
+	$(CROSS_CC) $(CROSS_LDFLAGS) -o $@ -T $(SIM_DIR)/link.ld -nostartfiles -nostdlib $^
+
+$(SIM_OBJ_DIR)/%.o: $(SIM_DIR)/%.c
+	@mkdir -p $(SIM_OBJ_DIR)
+	$(CROSS_CC) $(CROSS_CFLAGS) -o $@ -c $< -mcpu=arm810
+
+$(SIM_OBJ_DIR)/%.o: $(SIM_DIR)/%.S
+	@mkdir -p $(SIM_OBJ_DIR)
+	$(CROSS_CC) $(CROSS_CFLAGS) -o $@ -c $<
+
 exe: exe/$(TOP)
 
 exe/%: $(OBJ_DIR)/%/V%.mk
 	$(MAKE) -C $(OBJ_DIR)/$* -f V$*.mk
 
+.PRECIOUS: $(SIM_OBJ_DIR)/%
 .SECONDEXPANSION:
 
 $(OBJ_DIR)/%.mk: \
-- 
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