diff --git a/Makefile b/Makefile
index 537c10a..b1099c9 100644
--- a/Makefile
+++ b/Makefile
@@ -4,13 +4,9 @@ include Makefile.kernel.mk
 include Makefile.linaro.mk
 include Makefile.pxe.mk
 include Makefile.rancheros.mk
-include Makefile.rockchip.mk
-include Makefile.rockchip.debug.mk
 include Makefile.sunxi.mk
 
 image: image-kernel \
-	image-rockchip \
-	image-sunxi \
 	image-pxe \
 	image-rancher
 
diff --git a/Makefile.kernel.mk b/Makefile.kernel.mk
index 7e1f091..b1d64a1 100644
--- a/Makefile.kernel.mk
+++ b/Makefile.kernel.mk
@@ -10,11 +10,13 @@ ifeq ($(FORCE), 1)
 .PHONY: image/kernel-arm64
 endif
 image/kernel-arm64: kernel/.config
-	make -C kernel Image ARCH=arm64 CROSS_COMPILE="ccache aarch64-linux-gnu-" -j4
+	make -C kernel Image ARCH=arm64 CROSS_COMPILE="ccache aarch64-linux-gnu-" -j$$(nproc)
 	cp kernel/arch/arm64/boot/Image $@
 
-image/dtbs/rockchip/rk3328-rock64.dtb: image/kernel-arm64 kernel/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts kernel/arch/arm64/boot/dts/rockchip/rk3328.dtsi
-	make -C kernel dtbs ARCH=arm64 CROSS_COMPILE="ccache aarch64-linux-gnu-" -j4
+image/dtbs/rockchip/rk3328-rock64.dtb: image/kernel-arm64 \
+	kernel/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts \
+	kernel/arch/arm64/boot/dts/rockchip/rk3328.dtsi
+	make -C kernel dtbs ARCH=arm64 CROSS_COMPILE="ccache aarch64-linux-gnu-" -j$$(nproc)
 	make -C kernel dtbs_install ARCH=arm64 INSTALL_DTBS_PATH=$(CURDIR)/image/dtbs
 
 .PHONY: image-kernel
diff --git a/Makefile.rockchip.debug.mk b/Makefile.rockchip.debug.mk
deleted file mode 100644
index 404f156..0000000
--- a/Makefile.rockchip.debug.mk
+++ /dev/null
@@ -1,43 +0,0 @@
-run: image
-	rkflashtool/rkflashloader rk3328evb
-
-.PHONY: maskrom run image flash
-maskrom:
-	cat rkbin/rk33/rk3328_ddr_$(ROCKCHIP_DDR_SPEED)_v$(ROCKCHIP_DDR_VERSION).bin | openssl rc4 -K 7c4e0304550509072d2c7b38170d1711 | rkflashtool l
-	sleep 1s
-	cat rkbin/rk33/rk3328_usbplug_v$(ROCKCHIP_LOADER_VERSION).bin | openssl rc4 -K 7c4e0304550509072d2c7b38170d1711 | rkflashtool L
-	sleep 1s
-	rkflashtool e 64 32704
-	rkflashtool b
-	sleep 1s
-	cat rkbin/rk33/rk3328_ddr_$(ROCKCHIP_DDR_SPEED)_v$(ROCKCHIP_DDR_VERSION).bin | openssl rc4 -K 7c4e0304550509072d2c7b38170d1711 | rkflashtool l
-	sleep 1s
-	cat rkbin/rk33/rk3328_miniloader_v$(ROCKCHIP_LOADER_VERSION).bin | openssl rc4 -K 7c4e0304550509072d2c7b38170d1711 | rkflashtool L
-	sleep 2s
-
-flashrom:
-	cat rkbin/rk33/rk3328_ddr_$(ROCKCHIP_DDR_SPEED)_v$(ROCKCHIP_DDR_VERSION).bin | openssl rc4 -K 7c4e0304550509072d2c7b38170d1711 | rkflashtool l
-	sleep 1s
-	cat rkbin/rk33/rk3328_usbplug_v$(ROCKCHIP_LOADER_VERSION).bin | openssl rc4 -K 7c4e0304550509072d2c7b38170d1711 | rkflashtool L
-	sleep 1s
-	rkflashtool e 64 32704
-	rkflashtool w 64 8000 < image/rk3328evb-miniloader.img
-	rkflashtool b
-	sleep 2s
-	rkflashtool w 8192 8192 < image/rk3328evb-uboot.bin
-	rkflashtool w 16384 8192 < image/rk3328evb-trust.img
-	sleep 1s
-	rkflashtool b
-
-maskload:
-	make maskrom
-	rkflashtool w 8192 8192 < image/rk3328evb-uboot.bin
-	rkflashtool w 16384 8192 < image/rk3328evb-trust.img
-	rkflashtool b
-	sleep 1s
-	cat rkbin/rk33/rk3328_ddr_$(ROCKCHIP_DDR_SPEED)_v$(ROCKCHIP_DDR_VERSION).bin | openssl rc4 -K 7c4e0304550509072d2c7b38170d1711 | rkflashtool l
-	sleep 1s
-	cat rkbin/rk33/rk3328_miniloader_v$(ROCKCHIP_LOADER_VERSION).bin | openssl rc4 -K 7c4e0304550509072d2c7b38170d1711 | rkflashtool L
-
-reboot:
-	rkflashtool b
diff --git a/Makefile.rockchip.mk b/Makefile.rockchip.mk
deleted file mode 100644
index 57598f4..0000000
--- a/Makefile.rockchip.mk
+++ /dev/null
@@ -1,51 +0,0 @@
-ROCKCHIP_DDR_VERSION ?= 1.08
-ROCKCHIP_DDR_SPEED ?= 333MHz
-ROCKCHIP_LOADER_VERSION ?= 2.44
-ROCKCHIP_UBOOT_CONFIG ?= rock64-rk3328_defconfig
-
-arm-trusted-firmware:
-	git clone https://github.com/ARM-software/arm-trusted-firmware.git
-
-rkbin:
-	git clone https://github.com/rockchip-linux/rkbin
-
-u-boot-rockchip:
-	git clone https://github.com/ayufan-rock64/linux-u-boot u-boot-rockchip -b mainline-master
-
-rkbin/rk33/bl31.bin: arm-trusted-firmware $(LINARO)
-	make -C $< CROSS_COMPILE="$(LINARO_CC)" PLAT=rk3328 bl31
-	cp $</build/rk3328/release/bl31.bin $@
-
-ifeq ($(FORCE), 1)
-.PHONY: u-boot-rockchip/.config
-endif
-u-boot-rockchip/.config: u-boot-rockchip/configs/$(ROCKCHIP_UBOOT_CONFIG) $(LINARO)
-	make -C u-boot-rockchip $(ROCKCHIP_UBOOT_CONFIG) CROSS_COMPILE="$(LINARO_CC)"
-
-u-boot-rockchip/u-boot-dtb.bin: u-boot-rockchip/.config
-	make -C u-boot-rockchip CROSS_COMPILE="$(LINARO_CC)" DEBUG=$(DEBUG) all -j4
-
-.PHONY: u-boot-rockchip-build
-u-boot-rockchip-build: image/rk3328evb-uboot.bin
-
-image/rk3328evb-trust.img: # rkbin/rk33/bl31.bin
-	rkbin/tools/trust_merger blobs/rk3328trust.ini
-
-ifeq ($(FORCE), 1)
-.PHONY: image/rk3328evb-miniloader.img
-endif
-image/rk3328evb-miniloader.img: rkbin/rk33/rk3328_ddr_$(ROCKCHIP_DDR_SPEED)_v$(ROCKCHIP_DDR_VERSION).bin rkbin/rk33/rk3328_miniloader_v$(ROCKCHIP_LOADER_VERSION).bin u-boot-rockchip/u-boot-dtb.bin
-	cat rkbin/rk33/rk3328_ddr_$(ROCKCHIP_DDR_SPEED)_v$(ROCKCHIP_DDR_VERSION).bin | dd of=miniloader.tmp bs=4 skip=1
-	u-boot-rockchip/tools/mkimage -n rk3328 -T rksd -d miniloader.tmp $@.tmp
-	cat rkbin/rk33/rk3328_miniloader_v$(ROCKCHIP_LOADER_VERSION).bin >> $@.tmp
-	mv $@.tmp $@
-	rm miniloader.tmp
-
-image/rk3328evb-uboot.bin: u-boot-rockchip/u-boot-dtb.bin
-	rkbin/tools/loaderimage --pack --uboot $< $@ 0x200000
-
-.PHONY: image-rockchip
-image-rockchip: \
-	image/rk3328evb-trust.img \
-	image/rk3328evb-miniloader.img \
-	image/rk3328evb-uboot.bin