OPENOCD_HOST ?= localhost
OPENOCD_PORT_GDB ?= 3333
OPENOCD_PORT_TELNET ?= 4444
PREFIX ?= arm-none-eabi-

CC = $(PREFIX)gcc
GDB ?= $(PREFIX)gdb

CGENFLAGS = -mcpu=arm926ej-s -mthumb-interwork -fno-pie
WARN = -Wall -Wextra -Werror=return-type -Werror=implicit-function-declaration
OPTIMIZE = -g -Og
INCLUDE = -I.
GENDEP = -MMD -MP
DEFS = -DPLL_FBDIV=20

CFLAGS = -std=gnu17 $(CGENFLAGS) $(WARN) $(OPTIMIZE) $(INCLUDE) $(GENDEP) $(DEFS)
LDFLAGS = -static -nostartfiles -T bsp/fx3.ld -Wl,-z,max-page-size=4096,-Map,$(basename $@).map

VPATH = bsp

OBJS = main.o usb.o gpif.o gctl.o gpio.o uart.o util.o dma.o irq.o cache.o vectors.o jazelle.o nl-glue.o

all : jazelle.img

jazelle.img: jazelle.elf
	python3 elf2img.py $< $@

clean :
	rm -f jazelle.img jazelle.elf jazelle.map $(OBJS) $(OBJS:.o=.d)

jazelle.elf : $(OBJS)
	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^

openocd-launch:
	openocd -c "bindto $(OPENOCD_HOST)" -f ./arm926ejs_fx3.cfg -c init # TODO: ports

openocd-load: jazelle.elf
	printf 'reset halt\nload_image jazelle.elf\nexit\n' \
        | nc $(OPENOCD_HOST) $(OPENOCD_PORT_TELNET)

gdb:
	$(GDB) -ex 'target extended-remote $(OPENOCD_HOST):$(OPENOCD_PORT_GDB)' \
        -ex 'set $$pc=_start' \
        $(GDB_EXTRA_CMDS) \
        -ex c jazelle.elf

#        -ex 'b jazelle_exec' \

-include $(OBJS:.o=.d)

.PHONY: all clean openocd-launch openocd-load gdb