## SPDX-License-Identifier: MIT
##
## Copyright (c) 2018-2019 Andre Richter <andre.o.richter@gmail.com>

# Default to the RPi3
ifndef BSP
	BSP = bsp_rpi3
endif

# BSP-specific arguments
ifeq ($(BSP),bsp_rpi3)
	TARGET = aarch64-unknown-none-softfloat
	OUTPUT = kernel8.img
	QEMU_BINARY = qemu-system-aarch64
	QEMU_MACHINE_TYPE = raspi3
	QEMU_MISC_ARGS = -serial null -serial stdio
	LINKER_FILE = src/bsp/rpi3/link.ld
	RUSTC_MISC_ARGS = -C target-cpu=cortex-a53
endif

SOURCES = $(wildcard **/*.rs) $(wildcard **/*.S) $(wildcard **/*.ld)

XRUSTC_CMD = cargo xrustc \
		--target=$(TARGET) \
		--features $(BSP) \
		--release \
		-- \
		-C link-arg=-T$(LINKER_FILE) \
		$(RUSTC_MISC_ARGS)

CARGO_OUTPUT = target/$(TARGET)/release/kernel

OBJCOPY_CMD = cargo objcopy \
		-- \
		--strip-all \
		-O binary

CONTAINER_UTILS   = rustembedded/osdev-utils

DOCKER_CMD        = docker run -it --rm
DOCKER_ARG_CURDIR = -v $(shell pwd):/work -w /work
DOCKER_EXEC_QEMU  = $(QEMU_BINARY) -M $(QEMU_MACHINE_TYPE) -kernel $(OUTPUT)

.PHONY: all qemu clippy clean readelf objdump nm

all: clean $(OUTPUT)

$(CARGO_OUTPUT): $(SOURCES)
	RUSTFLAGS="-D warnings -D missing_docs" $(XRUSTC_CMD)

$(OUTPUT): $(CARGO_OUTPUT)
	cp $< .
	$(OBJCOPY_CMD) $< $(OUTPUT)

doc:
	cargo xdoc --target=$(TARGET) --features $(BSP) --document-private-items
	xdg-open target/$(TARGET)/doc/kernel/index.html

qemu: all
	$(DOCKER_CMD) $(DOCKER_ARG_CURDIR) $(CONTAINER_UTILS) \
	$(DOCKER_EXEC_QEMU) $(QEMU_MISC_ARGS)

clippy:
	cargo xclippy --target=$(TARGET) --features $(BSP)

clean:
	cargo clean

readelf:
	readelf -a kernel

objdump:
	cargo objdump --target $(TARGET) -- -disassemble -print-imm-hex kernel

nm:
	cargo nm --target $(TARGET) -- kernel | sort