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CFLAGS=-mcpu=cortex-a7 -ffreestanding -std=gnu11 -Wall -Wextra -O2 -fPIC -I.
ELFFLAGS=-nostdlib -lgcc
ARM_OBJECTS=kernel.o paging.o demo_functionality.o PL0_test.o uart.o loader_stage1.o loader_stage2.o
EMBEDDABLE_OBJECTS=PL_0_test_embeddable.o loader_stage2_embeddable.o
RENAME_FLAGS=--rename-section .data=.renamed_data --rename-section .rodata=.renamed_rodata --rename-section .text=.renamed_text --rename-section .bss=.renamed_bss
all : kernel7.img
%.o : %.c
arm-none-eabi-gcc $(CFLAGS) -c $^ -o $@
%.o : %.S
arm-none-eabi-as -mcpu=cortex-a7 $^ -o $@
%.img : %.elf
arm-none-eabi-objcopy $^ -O binary $@
%_embeddable.o : %.img
arm-none-eabi-objcopy -I binary -O elf32-littlearm -B arm --rename-section .data=.rodata $^ $@
libkernel_renamed.o : libkernel.o
arm-none-eabi-objcopy $(RENAME_FLAGS) $^ $@
PL_0_test.elf : PL0_test.o uart.o
arm-none-eabi-gcc -T PL0_test.ld -o $@ $(ELFFLAGS) $^
kernel.elf : boot.o kernel.o uart.o PL_0_test_embeddable.o demo_functionality.o paging.o libkernel_renamed.o interrupt_vector.o interrupts.o
arm-none-eabi-gcc -T linker.ld -o $@ $(ELFFLAGS) $^
loader_stage2.elf : loader_stage2.o uart.o
arm-none-eabi-gcc -T loader_stage2.ld -o $@ $(ELFFLAGS) $^
loader_stage2.img : loader_stage2.elf
arm-none-eabi-objcopy $^ -O binary $@
test -n "$$(find $@ -size -16384c)" || exit -1
loader.elf : boot.o loader_stage1.o loader_stage2_embeddable.o
arm-none-eabi-gcc -T loader_stage1.ld -o $@ $(ELFFLAGS) $^
qemu-elf : kernel.elf
qemu-system-arm -m 256 -M raspi2 -serial stdio -kernel $^
qemu-bin : loader.elf kernel.img pipe_image
./pipe_image --stdout | qemu-system-arm -m 256 -M raspi2 -serial stdio -kernel $<
run-on-rpi : kernel7.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 $@
clean :
-rm *.img *.elf *.o pipe_image
.PHONY: all qemu-elf qemu-bin clean
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