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# small makefile for compiling the kernel
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### Build configuration:
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# process and binary count
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PROCESS_COUNT = 8
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PACKAGED_BINARY_COUNT = 8
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# Define the maximum number of binaries packaged with the kernel
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PACKAGED_BINARY_COUNT = 4
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# Comment this out if you don't have any text IO device memory mapped
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CFLAGS += -DTEXT_IO_ADDR=0xff0000 -DTEXT_IO_BUFLEN=64
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# If you want to build without any extension, you can uncomment the next line
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#CFLAGS += -D__risc_no_ext=1
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# also change this to represent your target RISC-V architecture and extensions
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ARCH = rv32im_zicsr
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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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# Set this to the first out-of-bounds memory address
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END_OF_USABLE_MEM=0xff0000
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### End configuration
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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$(KLIBDIR) -MD -mcmodel=medany -Wall -Wextra -pedantic-errors -Wno-builtin-declaration-mismatch -march=$(ARCH)
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KERNEL_CFLAGS=-nostdlib -T linker.ld
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CFLAGS+=-DPROCESS_COUNT=$(PROCESS_COUNT) -DPACKAGED_BINARY_COUNT=$(PACKAGED_BINARY_COUNT) -DEND_OF_USABLE_MEM=$(END_OF_USABLE_MEM)
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# dependencies that need to be built:
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_DEPS = ecall.c csr.c sched.c io.c malloc.c
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# dependencies as object files:
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_OBJ = ecall.o sched.o boot.o csr.o io.o malloc.o
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DEPS = $(patsubst %,$(KLIBDIR)/%,$(_DEPS))
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OBJ = $(patsubst %,$(ODIR)/%,$(_OBJ))
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.PHONY: clean
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.PHONY: directories
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.PHONY: kernel
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directories:
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mkdir -p $(ODIR) $(TARGET)
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$(ODIR)/boot.o: $(KLIBDIR)/boot.S
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$(CC) -c -o $@ $(KLIBDIR)/boot.S $(CFLAGS) -D__assembly
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$(ODIR)/%.o: $(KLIBDIR)/%.c $(KLIBDIR)/%.h
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$(CC) -c -o $@ $(KLIBDIR)/$*.c $(CFLAGS)
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_kernel: $(OBJ)
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$(CC) -o $(TARGET)/kernel $^ kernel.c $(CFLAGS) $(KERNEL_CFLAGS)
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kernel: directories _kernel
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kernel-dump: kernel
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$(OBJDUMP) -SFldft $(TARGET)/kernel > $(TARGET)/kernel-objects
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all: kernel-dump
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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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