New sw folders

.gitignore

@@ -8,6 +8,7 @@
 *.map
 *.list
 *.bin
+*.hex
 *.o
 
 

Makefile

@@ -1,4 +1,4 @@
-ROM_TARGET=test_code/loop_test
+ROM_TARGET=bootloader
 
 INIT_HEX=hw/super6502_fpga/init_hex.mem
 HEX=sw/$(ROM_TARGET)/$(notdir $(ROM_TARGET)).bin

hw/super6502_fpga/src/sim/Makefile

@@ -23,7 +23,7 @@ all: waves
 
 waves: $(TB_NAME)
 #	./$(TB_NAME) -fst
-	./obj_dir/Vsim_top
+	./obj_dir/Vsim_top | tee run.log
 
 $(TB_NAME): $(SUPER6502_FPGA_SOURCES) $(SIM_SOURCES) $(COPY_FILES) $(SD_IMAGE)
 # $(IVERILOG) -g2005-sv $(FLAGS) -s $@ -o $@ $(INCLUDE) $(SUPER6502_FPGA_SOURCES) $(SIM_SOURCES) -I ../../

hw/super6502_fpga/src/sim/hvl/sim_top.sv

@@ -197,8 +197,12 @@ initial begin
     button_resetn <= '0;
     repeat(10) @(clk_cpu);
     button_resetn <= '1;
-    repeat(20000) @(posedge clk_cpu);
+    repeat(2000) @(posedge clk_cpu);
     $finish();
 end
 
+always @(posedge w_cpu0_sync) begin
+    $display("[%t] CPU Executed %x:%x", $time(), w_cpu0_addr, w_cpu0_data_from_dut);
+end
+
 endmodule

sw/Makefile

@@ -0,0 +1,19 @@
+SD_IMAGE = sd_image.bin
+BOOTLOADER = bootloader/bootloader.bin
+
+all: $(SD_IMAGE) $(BOOTLOADER)
+
+$(BOOTLOADER):
+	$(MAKE) -C bootloader bootloader.bin
+
+$(SD_IMAGE):
+	dd if=/dev/zero of=$@ bs=1M count=256
+	/sbin/mkfs.vfat $@
+	udisksctl loop-setup --file $@
+	udisksctl mount -b /dev/loop1
+	udisksctl unmount -b /dev/loop1
+	udisksctl loop-delete -b /dev/loop1
+
+clean:
+	rm -rf $(SD_IMAGE)
+	rm -rf $(BOOTLOADER)

sw/bootloader/Makefile

@@ -0,0 +1,38 @@
+CC=../toolchain/cc65/bin/cl65
+LD=../toolchain/cc65/bin/cl65
+CFLAGS=-T -t none -I. --cpu "65C02"
+LDFLAGS=-C link.ld -m $(NAME).map
+
+NAME=bootloader
+
+BIN=$(NAME).bin
+HEX=$(NAME).hex
+
+LISTS=lists
+
+SRCS=$(wildcard *.s) $(wildcard *.c)
+SRCS+=$(wildcard **/*.s) $(wildcard **/*.c)
+OBJS+=$(patsubst %.s,%.o,$(filter %s,$(SRCS)))
+OBJS+=$(patsubst %.c,%.o,$(filter %c,$(SRCS)))
+
+all: $(HEX)
+
+$(HEX): $(BIN)
+	objcopy --input-target=binary --output-target=verilog $(BIN) $(HEX)
+
+$(BIN): $(OBJS)
+	$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) -o $@
+
+%.o: %.c $(LISTS)
+	$(CC) $(CFLAGS) -l $(LISTS)/$<.list -c $< -o $@
+
+%.o: %.s $(LISTS)
+	$(CC) $(CFLAGS) -l $(LISTS)/$<.list -c $< -o $@
+
+$(LISTS):
+	mkdir -p $(addprefix $(LISTS)/,$(sort $(dir $(SRCS))))
+
+.PHONY: clean
+clean:
+	rm -rf $(OBJS) $(BIN) $(HEX) $(LISTS) $(NAME).map
+

sw/bootloader/bootloader.s

@@ -0,0 +1,25 @@
+.export _init, _nmi_int, _irq_int
+
+.segment  "VECTORS"
+
+.addr      _nmi_int    ; NMI vector
+.addr      _init       ; Reset vector
+.addr      _irq_int    ; IRQ/BRK vector
+
+SDRAM= $200
+
+.code
+
+_nmi_int:
+_irq_int:
+
+_init:
+        lda #$00
+@start:
+        sta SDRAM
+        cmp SDRAM
+        bne @end
+        ina
+        bra @start
+
+@end:   bra @end

sw/bootloader/link.ld

@@ -0,0 +1,30 @@
+MEMORY
+{
+    RAM: start = $0000, size = $200;
+    ROM: start = $F000, size = $1000, file = %O;
+}
+
+SEGMENTS {
+    ZEROPAGE: load = RAM, type = zp,  define   = yes;
+    DATA:     load = ROM, type = rw,  define   = yes;
+    CODE:     load = ROM, type = ro;
+    RODATA:   load = ROM, type = ro;
+    VECTORS:  load = ROM, type = ro,  start    = $FFFA;
+}
+
+FEATURES {
+    CONDES:    segment = STARTUP,
+               type    = constructor,
+               label   = __CONSTRUCTOR_TABLE__,
+               count   = __CONSTRUCTOR_COUNT__;
+    CONDES:    segment = STARTUP,
+               type    = destructor,
+               label   = __DESTRUCTOR_TABLE__,
+               count   = __DESTRUCTOR_COUNT__;
+}
+
+SYMBOLS {
+    # Define the stack size for the application
+    __STACKSIZE__:  value = $0200, type = weak;
+    __STACKSTART__: type = weak, value = $0800; # 2k stack
+}

sw/kernel/Makefile

@@ -0,0 +1,39 @@
+CC=../toolchain/cc65/bin/cl65
+LD=../toolchain/cc65/bin/cl65
+CFLAGS=-T -t none -I. --cpu "65C02"
+LDFLAGS=-C link.ld -m $(NAME).map
+
+NAME=bootloader
+
+BIN=$(NAME).bin
+HEX=$(NAME).hex
+
+LISTS=lists
+
+SRCS=$(wildcard *.s) $(wildcard *.c)
+SRCS+=$(wildcard **/*.s) $(wildcard **/*.c)
+OBJS+=$(patsubst %.s,%.o,$(filter %s,$(SRCS)))
+OBJS+=$(patsubst %.c,%.o,$(filter %c,$(SRCS)))
+
+# Make sure the kernel linked to correct address, no relocation!
+all: $(HEX)
+
+$(HEX): $(BIN)
+	objcopy --input-target=binary --output-target=verilog $(BIN) $(HEX)
+
+$(BIN): $(OBJS)
+	$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) -o $@
+
+%.o: %.c $(LISTS)
+	$(CC) $(CFLAGS) -l $(LISTS)/$<.list -c $< -o $@
+
+%.o: %.s $(LISTS)
+	$(CC) $(CFLAGS) -l $(LISTS)/$<.list -c $< -o $@
+
+$(LISTS):
+	mkdir -p $(addprefix $(LISTS)/,$(sort $(dir $(SRCS))))
+
+.PHONY: clean
+clean:
+	rm -rf $(OBJS) $(BIN) $(HEX) $(LISTS) $(NAME).map
+

sw/kernel/kernel.s

@@ -0,0 +1,9 @@
+.segment "ENTRY"
+
+.addr main
+
+
+.code
+
+main:
+    bra main

sw/kernel/link.ld

@@ -0,0 +1,30 @@
+MEMORY
+{
+    RAM: start = $0000, size = $200;
+    KERNEL: start = $8000, size = $7000, file = %O;
+}
+
+SEGMENTS {
+    ZEROPAGE: load = RAM, type = zp,  define   = yes;
+    ENTRY:    load = KERNEL, type = ro, start = $8000;
+    DATA:     load = KERNEL, type = rw,  define   = yes;
+    CODE:     load = KERNEL, type = ro;
+    RODATA:   load = KERNEL, type = ro;
+}
+
+FEATURES {
+    CONDES:    segment = STARTUP,
+               type    = constructor,
+               label   = __CONSTRUCTOR_TABLE__,
+               count   = __CONSTRUCTOR_COUNT__;
+    CONDES:    segment = STARTUP,
+               type    = destructor,
+               label   = __DESTRUCTOR_TABLE__,
+               count   = __DESTRUCTOR_COUNT__;
+}
+
+SYMBOLS {
+    # Define the stack size for the application
+    __STACKSIZE__:  value = $0200, type = weak;
+    __STACKSTART__: type = weak, value = $0800; # 2k stack
+}