export PATH := $(CURDIR)/tools/gnu/bin:$(PATH)

CROSS	  = riscv32-unknown-elf-
CC	  = $(CROSS)gcc
LD	  = $(CROSS)ld
OBJCOPY   = $(CROSS)objcopy
PERL      = perl
INCLUDE   = -I. -I./include
include ../riscv-opts.mk
CPPFLAGS  = $(INCLUDE) $(riscv_flags)
CFLAGS    = $(CPPFLAGS)
SFLAGS    = $(CPPFLAGS) -D__ASSEMBLY__
LDFLAGS   = $(CFLAGS) \
	    -nostdlib \
	    -Wl,--section-start=.init=0 \
	    -Wl,-z,common-page-size=16 -Wl,-z,max-page-size=16

gendeps   = -MD -MF .$(@F).d

# Delete output files on error
.DELETE_ON_ERROR:

# Don't delete intermediate files
.SECONDARY:

all: boot.mif

# Generate MIF file for 2Kx32 RAM
boot_depth  := 2048
boot_width  := 32
boot_stride := 1

boot.elf: head.o hello.o

%.mif: %.bin bin2mif.pl
	$(PERL) bin2mif.pl $< $@ $($*_depth) $($*_width) $($*_stride)

%.hex: %.elf
	$(OBJCOPY) -O ihex $< $@

%.mem: %.bin
	$(BIN2MEM) $< > $@

%.bin: %.elf
	$(OBJCOPY) -O binary $< $@

%.elf:
	$(CC) $(LDFLAGS) -o $@ $^

%.o: %.c
	$(CC) $(CFLAGS) $(CFLAGS_$<) $(gendeps) -c -o $@ $<

%.s: %.c
	$(CC) $(CFLAGS) $(CFLAGS_$<) $(gendeps) -S -o $@ $<

%.i: %.c
	$(CC) $(CFLAGS) $(CFLAGS_$<) $(gendeps) -E -o $@ $<

%.o: %.S
	$(CC) $(SFLAGS) $(SFLAGS_$<) $(gendeps) -c -o $@ $<

%.s: %.S
	$(CC) $(SFLAGS) $(SFLAGS_$<) $(gendeps) -o $@ $<

clean:
	rm -f *.o *.i *.s *.elf *.bin .*.d

spotless: clean
	rm -f *.mem *.hex *.mif

-include .*.d