PREFIX ?= arm-none-eabi-
CC = $(PREFIX)gcc
CFLAGS = -mcpu=cortex-a9
LDFLAGS = -T zynq.ld -nostartfiles -nostdlib
GDB ?= $(PREFIX)gdb
PYTHON3 ?= python3
NC ?= nc

OPENOCD_HOST ?= 172.16.10.2
OPENOCD_PORT_GDB ?= 3333
OPENOCD_PORT_TELNET ?= 4444

default: all

all: zynq.elf

zynq.o: zynq.c
	$(CC) $(CFLAGS) -c -o "$@" "$<"

zynq.elf: zynq.o
	$(CC) $(CFLAGS) $(LDFLAGS) -o "$@" $^

openocd-load: zynq.elf
	{ $(PYTHON3) ./elf2oocd.py "$<"; echo exit; } | $(NC) $(OPENOCD_HOST) $(OPENOCD_PORT_TELNET)
#	printf 'halt\nload_image zynq.elf\nexit\n' \
#        | nc $(OPENOCD_HOST) $(OPENOCD_PORT_TELNET)

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

clean:
	@$(RM) -v zynq.o zynq.elf

.PHONY: gdb openocd-load all default clean