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# Kernel Sources/Objects
C_SOURCEK = $(wildcard kernel/*.c kernel/**/*.c)
C_OBJECTk = ${C_SOURCEK:.c=.co}
C_OBJECTK = ${subst kernel/,obj/kernel/,${C_OBJECTk}}
A_SOURCEK = $(wildcard kernel/*.S kernel/**/*.S)
A_OBJECTk = ${A_SOURCEK:.S=.ao}
A_OBJECTK = ${subst kernel/,obj/kernel/,${A_OBJECTk}}
# User Sources/Objects
C_SOURCEU = $(wildcard usr/*.c usr/**/*.c)
C_OBJECTu = ${C_SOURCEU:.c=.co}
C_OBJECTU = ${subst usr/,obj/usr/,${C_OBJECTu}}
A_SOURCEU = $(wildcard usr/*.S usr/**/*.S)
A_OBJECTu = ${A_SOURCEU:.S=.ao}
A_OBJECTU = ${subst usr/,obj/usr/,${A_OBJECTu}}
# Combined Objects
C_OBJECTD = $(C_OBJECTK) $(C_OBJECTU)
A_OBJECTD = $(A_OBJECTK) $(A_OBJECTU)
ATTACH_USB ?= 0
AUTO ?= 0
BSP ?= 2
GDEBUG ?= 0
DEBUG ?= 0
SILENT ?= 0
DISK ?= /dev/sdc1
CROSS = arm-none-eabi
CC = ${CROSS}-gcc
AS = ${CROSS}-as
OBJCOPY = ${CROSS}-objcopy
OBJDUMP = ${CROSS}-objdump
QEMU = qemu-system-arm
GDB = gdb-multiarch
CFLAGS = -mcpu=cortex-a7 -fpic -ffreestanding -std=gnu99 -O3 -Wall -Wextra -nostdlib -Iinclude -g
CFLAGS += -DVERSION="\"0.9z\""
AFLAGS = -mcpu=cortex-a7 -Iinclude -g
QFLAGS = -M raspi2b -cpu cortex-a7 -m 1G
# Attach USB if requested
ifneq ("$(ATTACH_USB)","0")
QFLAGS += -device usb-kbd
QFLAGS += -trace events=events
endif
# Use Automation Pipe if requested
ifneq ("$(AUTO)","0")
QFLAGS += -chardev pipe,id=char0,mux=on,logfile=serial.log,path=guest -serial chardev:char0 -mon chardev=char0
else
QFLAGS += -chardev stdio,id=char0,mux=on,logfile=serial.log,signal=off -serial chardev:char0 -mon chardev=char0
endif
# Use Correct MMIO Address
ifeq ($(BSP),2)
BSP23 = 1
CFLAGS += -DBSP23
endif
# Pause and wait for GDB if requested
ifneq ($(GDEBUG),0)
QFLAGS += -s -S
endif
# Debugging Flag
ifneq ($(DEBUG),0)
CFLAGS += -DDEBUG
endif
# Don't use screen if requested
ifneq ("$(SILENT)","0")
QFLAGS += -nographic
endif
# Attach sd if exists
ifneq ("$(wildcard ./sd.hda)","")
QFLAGS += -drive file=sd.hda,if=sd,format=raw
endif
.PHONY: clean debug disk dump run test tree
default: clean build/kernel7.img
build/kernel7.img: CFLAGS += -DRPI_BUILD
build/kernel7.img: CFLAGS := $(filter-out -g,$(CFLAGS))
build/kernel7.img: AFLAGS := $(filter-out -g,$(AFLAGS))
build/kernel7.img: build/kernel.elf
@mkdir -p $(@D)
${OBJCOPY} $< -O binary $@
build/kernel.list: build/kernel.elf
@mkdir -p $(@D)
${OBJDUMP} -D $< > $@
dump: build/kernel.list
build/kernel.elf: ${A_OBJECTD} ${C_OBJECTD}
@tput setaf 6 2> /dev/null || true; echo Linking Kernel; tput sgr0 2> /dev/null || true
@mkdir -p $(@D)
@echo ${C_SOURCEK}
${CC} -T linker.ld -o $@ -ffreestanding -O3 -nostdlib $^
obj/kernel/%.co: kernel/%.c
@mkdir -p $(@D)
${CC} ${CFLAGS} -c $< -o $@
obj/kernel/%.ao: kernel/%.S
@mkdir -p $(@D)
${AS} ${AFLAGS} -c $< -o $@
obj/usr/%.co: usr/%.c
@mkdir -p $(@D)
${CC} ${CFLAGS} -c $< -o $@
obj/usr/%.ao: usr/%.S
@mkdir -p $(@D)
${AS} ${AFLAGS} -c $< -o $@
run: build/kernel.elf
@tput setaf 6 2> /dev/null || true; echo Starting QEMU; tput sgr0 2> /dev/null || true
@${QEMU} -kernel $< ${QFLAGS}
debug: build/kernel.list
@tput setaf 6 2> /dev/null || true; echo Starting GDB; tput sgr0 2> /dev/null || true
@${GDB} $< -command=gdbinit
sd.hda:
@cp README.md sd.hda
@dd if=/dev/zero of=sd.hda count=1 bs=1 seek=16383
disk: sd.hda
clean:
@tput setaf 6 2> /dev/null || true; echo Clearing Build; tput sgr0 2> /dev/null || true
rm -rf obj/* build/*
tree:
@tree -a -I obj\|build\|.git\|.gitignore
test: clean build/kernel.elf
@tput setaf 6 2> /dev/null || true; echo Running Tests; tput sgr0 2> /dev/null || true
@./tests/run.sh
copy: clean build/kernel7.img
sudo mount /mnt/sd0
sudo cp build/kernel7.img /mnt/sd0
sudo umount /mnt/sd0
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