ARCH = $(shell uname -m)
ifneq ("$(ARCH)", "ppc64")
ifneq ("$(ARCH)", "ppc64le")
	CROSS_COMPILE ?= powerpc64le-linux-gnu-
endif
endif

# a multiplier factor on sleep loops. this allows simulations to run
# at much shorter intervals
LONG_TIMER_MULT = 10000
SHORT_TIMER_MULT = 100
#LONG_TIMER_MULT = 1
#SHORT_TIMER_MULT = 1

# SPI boot address 0x1000_0000, main SRAM boot would be 0x0000_0000
# but remember to recompile external_core_top.v with a matching
# --pc_reset=0xNNNNNNNN
BOOT_INIT_BASE ?= 0x10000000
# BOOT_INIT_BASE ?= 0x0

LIBGRAMDIR = ../libgram
LIBGRAMINC = ../libgram/include

GRAMOBJS := $(LIBGRAMDIR)/src/init.o \
            $(LIBGRAMDIR)/src/dfii.o \
            $(LIBGRAMDIR)/src/calibration.o

CC = $(CROSS_COMPILE)gcc
LD = $(CROSS_COMPILE)ld
OBJCOPY = $(CROSS_COMPILE)objcopy

CFLAGS = -Os -g -Wall -std=c99 -msoft-float -mno-string \
            -mno-multiple -mno-vsx -mno-altivec -mlittle-endian \
            -fno-stack-protector -mstrict-align -ffreestanding \
            -fdata-sections -ffunction-sections -I../include \
            -I $(LIBGRAMINC) \
            -DLONG_TIMER_MULT=$(LONG_TIMER_MULT) \
            -DBOOT_INIT_BASE=$(BOOT_INIT_BASE) \
            -DSHORT_TIMER_MULT=$(SHORT_TIMER_MULT)
ASFLAGS = $(CFLAGS)
LDFLAGS = -T powerpc.lds

all: coldboot.hex coldboot.S

console.o: ../lib/console.c
	$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@

init.o: ../libgram/src/init.c
	$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@

dfii.o: ../libgram/src/dfii.c
	$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@

calibration.o: ../libgram/src/calibration.c
	$(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@

powerpc.lds: powerpc.lds.S
	$(CC) $(CFLAGS) -P -E powerpc.lds.S -o powerpc.lds

coldboot.elf: coldboot.o head.o ../lib/console.o $(GRAMOBJS) powerpc.lds
	$(LD) $(LDFLAGS) -o $@ coldboot.o head.o ../lib/console.o $(GRAMOBJS)

coldboot.bin: coldboot.elf
	$(OBJCOPY) -O binary $^ $@

coldboot.hex: coldboot.bin
	../scripts/bin2hex.py $^ > $@
	powerpc64le-linux-gnu-objdump -D coldboot.elf > coldboot.as

coldboot.S: coldboot.elf
	objdump -S coldboot.elf > coldboot.S


clean:
	@rm -f ../lib/*.o ../libgram/src/*.o *.o coldboot.elf coldboot.bin coldboot.hex coldboot.as coldboot.S powerpc.lds
distclean: clean
	rm -f *~