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CFLAGS=-mcpu=cortex-a7 -ffreestanding -std=gnu11 -Wall -Wextra -O2 -I.
ELFFLAGS=-nostdlib -lgcc
ARM_OBJECTS=kernel.o paging.o demo_functionality.o PL0_test.o uart.o loader_stage1.o loader_stage2.o
KERNEL_STAGE2_OBJECTS=setup.o interrupt_vector.o interrupts.o uart.o demo_functionality.o paging.o ramfs_embeddable.o ramfs.o strings.o io.o
PL_0_TEST_OBJECTS=PL0_utils.o svc.o PL0_test.o strings.o io.o
LOADER_STAGE2_OBJECTS=uart.o strings.o io.o loader_stage2.o
RAMFS_FILES=PL_0_test.img
all : kernel.img
%.o : %.c
arm-none-eabi-gcc $(CFLAGS) -c $^ -o $@
%.img : %.elf
arm-none-eabi-objcopy $^ -O binary $@
%.o : %.S
arm-none-eabi-as -mcpu=cortex-a7 $^ -o $@
%_embeddable.o : %.img
arm-none-eabi-objcopy -I binary -O elf32-littlearm -B arm $^ $@
PL_0_test.elf : PL0_test.ld $(PL_0_TEST_OBJECTS)
arm-none-eabi-gcc -T $< -o $@ $(ELFFLAGS) $(PL_0_TEST_OBJECTS)
kernel_stage1.o : kernel_stage1.S kernel_stage2.img
arm-none-eabi-as -mcpu=cortex-a7 $< -o $@
kernel.elf : kernel_stage1.ld kernel_stage1.o
arm-none-eabi-gcc -T $< -o $@ $(ELFFLAGS) kernel_stage1.o
kernel_stage2.elf : kernel_stage2.ld $(KERNEL_STAGE2_OBJECTS)
arm-none-eabi-gcc -T $< -o $@ $(ELFFLAGS) $(KERNEL_STAGE2_OBJECTS)
loader_stage2.elf : loader_stage2_linker.ld $(LOADER_STAGE2_OBJECTS)
arm-none-eabi-gcc -T $< -o $@ $(ELFFLAGS) $(LOADER_STAGE2_OBJECTS)
loader_stage1.o : loader_stage1.S loader_stage2.img
arm-none-eabi-as -mcpu=cortex-a7 $< -o $@
loader.elf : loader_stage1_linker.ld loader_stage1.o
arm-none-eabi-gcc -T $< -o $@ $(ELFFLAGS) loader_stage1.o
loader.img : loader.elf
arm-none-eabi-objcopy $^ -O binary $@
# check if the resulting image is not too big
test -n "$$(find $@ -size -16384c)" || exit -1
qemu-elf : kernel.elf
qemu-system-arm -m 256 -M raspi2 -serial stdio -kernel $^
qemu-img : kernel.img
qemu-system-arm -m 256 -M raspi2 -serial stdio -kernel $^
qemu-bin : loader.img kernel.img pipe_image
./pipe_image --stdout | qemu-system-arm -m 256 -M raspi2 -serial stdio -kernel $<
run-on-rpi : kernel.img pipe_image
./pipe_image --stdout | sudo socat FILE:/dev/ttyUSB0,b115200,raw -
screen /dev/ttyUSB0 115200,cs8,-parenb,-cstopb,-hupcl
pipe_image : pipe_image.c lib/rs232/rs232.c
gcc -Wall -std=gnu99 -O3 $^ -o $@
makefs : makefs.c
gcc -Wall -std=gnu99 -O3 $^ -o $@
ramfs.img : makefs $(RAMFS_FILES)
./makefs $(RAMFS_FILES) > $@
clean :
-rm *.img *.elf *.o pipe_image makefs
.PHONY: all qemu-elf qemu-bin clean
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