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# simple makefile for this kernel project
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# This is BAD. it should be reworked before anyone else uses this.
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# kernel lib dir
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KLIBDIR=kinclude
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# object file dir
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ODIR=obj
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# target dir
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TARGET=out
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GCC_PREF=riscv32-unknown-elf-
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CC=$(GCC_PREF)gcc
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OBJDUMP=$(GCC_PREF)objdump
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CFLAGS=-I$(KLIBDIR) -O3 -MD
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KERNEL_CFLAGS=-nostdlib -T linker.ld
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ARCH = rv32im
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### Build configuration:
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# uncomment to build with only the rv32i standard
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CFLAGS += -D__risc_no_ext=1
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ARCH = rv32i
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# configure if mtime is memory-mapped or inside a CSR:
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# replace 0xFF11FF22FF33 with the correct address
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CFLAGS += -DTIMECMP_IN_MEMORY=1 -DTIMECMP_MEM_ADDR=0xFF11FF22
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### End configuration
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CFLAGS += -march=$(ARCH)
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# dependencies that need to be built:
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_DEPS = ecall.c csr.c mutex.c sched.c
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# dependencies as object files:
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_OBJ = ecall.o mutex.o sched.o boot.o csr.o
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DEPS = $(patsubst %,$(KLIBDIR)/%,$(_DEPS))
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OBJ = $(patsubst %,$(ODIR)/%,$(_OBJ))
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$(ODIR)/boot.o: $(KLIBDIR)/boot.S
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$(CC) -c -o $@ $(KLIBDIR)/boot.S $(CFLAGS) -D__assembly=1
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$(ODIR)/%.o: $(KLIBDIR)/%.c $(KLIBDIR)/%.h
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$(CC) -c -o $@ $(KLIBDIR)/$*.c $(CFLAGS)
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kernel: $(OBJ)
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mkdir -p $(TARGET)
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$(CC) -o $(TARGET)/$@ $^ kernel.c $(CFLAGS) $(KERNEL_CFLAGS)
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kernel-dump: kernel
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$(OBJDUMP) -SFlDf $(TARGET)/kernel > $(TARGET)/kernel-objects
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.PHONY: clean
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clean:
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rm -rf $(ODIR) *~ $(KLIBDIR)/*~ $(TARGET)
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-include $(OBJ:.o=.d)
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