diff --git a/Makefile b/Makefile
index dece959..130ea25 100644
--- a/Makefile
+++ b/Makefile
@@ -26,6 +26,7 @@ else
 LOADER_BIN ?= rkbin/rk33/rk3328_loader_ddr333_v1.08.244.bin
 endif
 MINILOADER_BIN ?= rkbin/rk33/rk3328_miniloader_v2.44.bin
+SPI_BOOT ?= rksd
 else ifeq (rockpro64,$(BOARD_TARGET))
 ATF_PLAT ?= rk3399
 UBOOT_DEFCONFIG ?= rockpro64-rk3399_defconfig
@@ -35,6 +36,7 @@ BOARD_CHIP ?= rk3399
 LOADER_BIN ?= rkbin/rk33/rk3399_loader_v1.10.112_support_1CS.bin
 LOADER_RESTART ?= 1
 MINILOADER_BIN ?= rkbin/rk33/rk3399_miniloader_v1.12.bin
+# SPI_BOOT ?= rkspl # not-yet-supported
 else
 $(error Unsupported BOARD_TARGET)
 endif
diff --git a/Makefile.uboot.mk b/Makefile.uboot.mk
index 67126fe..37c96ca 100644
--- a/Makefile.uboot.mk
+++ b/Makefile.uboot.mk
@@ -1,25 +1,27 @@
 UBOOT_OUTPUT_DIR ?= $(CURDIR)/tmp/u-boot-$(BOARD_TARGET)
 UBOOT_LOADER ?= out/u-boot-$(BOARD_TARGET)/idbloader.img
+ifeq (rkspl,$(SPI_BOOT))
+UBOOT_LOADER_SPL ?= out/u-boot-$(BOARD_TARGET)/idbloader_spl.img
+endif
 UBOOT_MAKE ?= make -C $(UBOOT_DIR) KBUILD_OUTPUT=$(UBOOT_OUTPUT_DIR) BL31=$(realpath $(BL31)) \
 	CROSS_COMPILE="ccache aarch64-linux-gnu-"
 UBOOT_PACKAGE ?= u-boot-$(BOARD_TARGET)-$(RELEASE_NAME)_all.deb
 
 tmp/u-boot-$(BOARD_TARGET)/.config: $(UBOOT_DIR)/configs/$(UBOOT_DEFCONFIG)
-	$(UBOOT_MAKE) $(UBOOT_DEFCONFIG) 
+	$(UBOOT_MAKE) $(UBOOT_DEFCONFIG)
 
-$(UBOOT_LOADER): tmp/u-boot-$(BOARD_TARGET)/.config $(BL31)
+$(UBOOT_OUTPUT_DIR)/u-boot.itb: tmp/u-boot-$(BOARD_TARGET)/.config $(BL31)
 	$(UBOOT_MAKE) -j $$(nproc)
 	$(UBOOT_MAKE) -j $$(nproc) u-boot.itb
+
+$(UBOOT_LOADER): $(UBOOT_OUTPUT_DIR)/u-boot.itb
 	mkdir -p out/u-boot-$(BOARD_TARGET)
 ifneq (,$(USE_UBOOT_SPL))
 	$(UBOOT_OUTPUT_DIR)/tools/mkimage -n $(BOARD_CHIP) -T rksd -d $(UBOOT_OUTPUT_DIR)/spl/u-boot-spl.bin $@.tmp
 else ifneq (,$(USE_UBOOT_TPL))
 	$(UBOOT_OUTPUT_DIR)/tools/mkimage -n $(BOARD_CHIP) -T rksd -d $(UBOOT_OUTPUT_DIR)/tpl/u-boot-tpl.bin $@.tmp
 	cat $(UBOOT_OUTPUT_DIR)/spl/u-boot-spl.bin >> $@.tmp
-else ifeq (rock64,$(BOARD_TARGET))
-	$(UBOOT_OUTPUT_DIR)/tools/mkimage -n $(BOARD_CHIP) -T rksd -d $(DDR) $@.tmp
-	cat $(UBOOT_OUTPUT_DIR)/spl/u-boot-spl.bin >> $@.tmp
-else ifeq (rockpro64,$(BOARD_TARGET))
+else ifneq (,$(DDR))
 	$(UBOOT_OUTPUT_DIR)/tools/mkimage -n $(BOARD_CHIP) -T rksd -d $(DDR) $@.tmp
 	cat $(UBOOT_OUTPUT_DIR)/spl/u-boot-spl.bin >> $@.tmp
 else
@@ -29,6 +31,28 @@ endif
 	dd if=$(UBOOT_OUTPUT_DIR)/u-boot.itb of=$@.tmp seek=$$((0x200-64)) conv=notrunc
 	mv $@.tmp $@
 
+ifeq (,$(UBOOT_LOADER_SPL))
+$(UBOOT_LOADER_SPL): $(UBOOT_OUTPUT_DIR)/u-boot.itb
+	mkdir -p out/u-boot-$(BOARD_TARGET)
+ifneq (,$(USE_UBOOT_SPL))
+	$(UBOOT_OUTPUT_DIR)/tools/mkimage -n $(BOARD_CHIP) -T rkspi -d $(UBOOT_OUTPUT_DIR)/spl/u-boot-spl.bin $@.tmp
+else ifneq (,$(USE_UBOOT_TPL))
+	$(UBOOT_OUTPUT_DIR)/tools/mkimage -n $(BOARD_CHIP) -T rkspi -d $(UBOOT_OUTPUT_DIR)/tpl/u-boot-tpl.bin $@.tmp
+	cat $(UBOOT_OUTPUT_DIR)/spl/u-boot-spl.bin >> $@.tmp
+else ifneq (,$(DDR))
+	$(UBOOT_OUTPUT_DIR)/tools/mkimage -n $(BOARD_CHIP) -T rkspi -d $(DDR) $@.tmp
+	for i in $$(seq 1 128); do \
+		dd count=4 && dd of=/dev/zero count=4; \
+	done < $(UBOOT_OUTPUT_DIR)/spl/u-boot-spl.bin >> $@.tmp
+else
+	@echo "Invalid $(BOARD_TARGET)"
+	@exit 1
+endif
+	ls -al $@.tmp
+	dd if=$(UBOOT_OUTPUT_DIR)/u-boot.itb of=$@.tmp seek=$$((0x200)) conv=notrunc
+	mv $@.tmp $@
+endif
+
 .PHONY: u-boot-menuconfig		# edit u-boot config and save as defconfig
 u-boot-menuconfig:
 	$(UBOOT_MAKE) ARCH=arm64 $(UBOOT_DEFCONFIG)
@@ -45,20 +69,7 @@ u-boot-build:
 u-boot-clear:
 	rm -rf $(UBOOT_LOADER)/..
 
-out/u-boot/%/boot.scr: blobs/%.cmd
-	mkdir -p $$(dirname $@)
-	mkimage -C none -A arm -T script -d $< $@
-
-out/u-boot/%/boot.img: out/u-boot/%/boot.scr
-	dd if=/dev/zero of=$@ bs=1M count=2
-	mkfs.vfat -n "u-boot-script" $@
-	mcopy -sm -i $@ $< ::
-
-u-boot-%-$(BOARD_TARGET).img: out/u-boot/%/boot.img $(UBOOT_LOADER)
-	build/mk-image.sh -c $(BOARD_CHIP) -d out/u-boot-$(BOARD_TARGET) -t system -s 128 -b $< -o "$@.tmp"
-	mv "$@.tmp" $@
-
-$(UBOOT_PACKAGE): u-boot-package $(UBOOT_LOADER)
+$(UBOOT_PACKAGE): u-boot-package $(UBOOT_LOADER) $(UBOOT_LOADER_SPL)
 	fpm -s dir -t deb -n u-boot-$(BOARD_TARGET) -v $(RELEASE_NAME) \
 		-p $@ \
 		--deb-priority optional --category admin \
@@ -76,13 +87,44 @@ $(UBOOT_PACKAGE): u-boot-package $(UBOOT_LOADER)
 		--vendor "Kamil Trzciński" \
 		-a all \
 		u-boot-package/root/=/ \
-		$(UBOOT_LOADER)=/usr/lib/u-boot-$(BOARD_TARGET)/idbloader.img
+		$(addsuffix =/usr/lib/u-boot-$(BOARD_TARGET)/,$(UBOOT_LOADER) $(UBOOT_LOADER_SPL))
 
 .PHONY: u-boot-package
 u-boot-package: $(UBOOT_PACKAGE)
 
-.PHONY: u-boot-flash-spi-$(BOARD_TARGET)
-u-boot-flash-spi-$(BOARD_TARGET): u-boot-flash-spi-$(BOARD_TARGET).img.xz
+ifneq (,$(SPI_BOOT))
+out/u-boot/%/boot.scr: blobs/%.cmd
+	mkdir -p $$(dirname $@)
+	mkimage -C none -A arm -T script -d $< $@
+
+out/u-boot-$(BOARD_TARGET)/%-boot.img: out/u-boot/%/boot.scr $(UBOOT_LOADER) $(UBOOT_LOADER_SPL)
+	dd if=/dev/zero of=$@.tmp bs=1M count=32
+	mkfs.vfat -n "u-boot-script" $@.tmp
+	mcopy -sm -i $@.tmp $< ::
+ifneq (,$(UBOOT_LOADER_SPL))
+	mcopy -sm -i $@.tmp $(UBOOT_LOADER_SPL) ::
+else
+	mcopy -sm -i $@.tmp $(UBOOT_LOADER) ::
+endif
+	mv $@.tmp $@
 
-.PHONY: u-boot-erase-spi-$(BOARD_TARGET)
-u-boot-erase-spi-$(BOARD_TARGET): u-boot-erase-spi-$(BOARD_TARGET).img.xz
+u-boot-%-$(BOARD_TARGET).img: out/u-boot-$(BOARD_TARGET)/%-boot.img $(UBOOT_LOADER)
+	build/mk-image.sh -c $(BOARD_CHIP) -d out/u-boot-$(BOARD_TARGET) -t system -s 128 -b $< -o "$@.tmp"
+	mv "$@.tmp" $@
+
+.PHONY: u-boot-flash-spi
+u-boot-flash-spi: u-boot-flash-spi-$(BOARD_TARGET).img.xz
+
+.PHONY: u-boot-erase-spi
+u-boot-erase-spi: u-boot-erase-spi-$(BOARD_TARGET).img.xz
+
+else
+
+.PHONY: u-boot-flash-spi
+u-boot-flash-spi:
+	# not-supported
+
+.PHONY: u-boot-erase-spi
+u-boot-erase-spi:
+	# not-supported
+endif
diff --git a/Makefile.variants.mk b/Makefile.variants.mk
index a03ab14..205163c 100644
--- a/Makefile.variants.mk
+++ b/Makefile.variants.mk
@@ -32,8 +32,8 @@ linux-$(BOARD_TARGET): \
 	bionic-$(BOARD_TARGET) \
 	stretch-$(BOARD_TARGET) \
 	linux-virtual \
-	u-boot-flash-spi-$(BOARD_TARGET) \
-	u-boot-erase-spi-$(BOARD_TARGET)
+	u-boot-flash-spi \
+	u-boot-erase-spi
 
 .PHONY: linux-minimal-$(BOARD_TARGET)		# build all linux variants
 linux-minimal-$(BOARD_TARGET): \
@@ -42,12 +42,12 @@ linux-minimal-$(BOARD_TARGET): \
 	stretch-minimal-$(BOARD_TARGET) \
 	stretch-openmediavault-$(BOARD_TARGET) \
 	linux-virtual \
-	u-boot-flash-spi-$(BOARD_TARGET) \
-	u-boot-erase-spi-$(BOARD_TARGET)
+	u-boot-flash-spi \
+	u-boot-erase-spi
 
 .PHONY: linux-packages-$(BOARD_TARGET)		# build all packages only
 linux-packages-$(BOARD_TARGET): \
 	linux-virtual \
 	linux-package \
-	u-boot-flash-spi-$(BOARD_TARGET) \
-	u-boot-erase-spi-$(BOARD_TARGET)
+	u-boot-flash-spi \
+	u-boot-erase-spi
diff --git a/blobs/erase-spi.cmd b/blobs/erase-spi.cmd
index 33ae88e..fd49f89 100644
--- a/blobs/erase-spi.cmd
+++ b/blobs/erase-spi.cmd
@@ -3,7 +3,7 @@ setenv blink_power 'led power off; sleep 0.1; led power on'
 # erase flash
 run blink_power blink_power
 sf probe
-sf erase 8000 3e8000
+sf erase 0 3f0000
 
 # blink forever
 while true; do run blink_power; sleep 1; done
diff --git a/blobs/flash-spi.cmd b/blobs/flash-spi.cmd
index b357b6c..0631f99 100644
--- a/blobs/flash-spi.cmd
+++ b/blobs/flash-spi.cmd
@@ -1,17 +1,42 @@
 setenv blink_power 'led power off; sleep 0.1; led power on'
+setenv blink_standby 'led standby off; sleep 0.1; led standby on'
 
 # first read existing loader
 run blink_power
 sf probe
-${devtype} read ${kernel_addr_r} 40 1f40;
 
-# erase flash
-run blink_power blink_power
-sf erase 8000 3e8000
+# or load idbloader_spl.img and write it to 0 offset of spi
+# or load idbloader.img and write it to 0 offset of spi
+# or fail badly
 
-# write flash
-run blink_power blink_power blink_power
-sf write ${kernel_addr_r} 8000 3e8000
+if size ${devtype} ${devnum}:${distro_bootpart} idbloader_spl.img; then
+  load ${devtype} ${devnum}:${distro_bootpart} ${kernel_addr_r} idbloader_spl.img
 
-# blink forever
-while true; do run blink_power; sleep 1; done
+  # erase flash
+  run blink_power blink_power
+  sf erase 0 3f0000
+
+  # write flash
+  run blink_power blink_power blink_power
+  sf write ${kernel_addr_r} 0 ${filesize}
+
+  # blink forever
+  while true; do run blink_power; sleep 1; done
+elif size ${devtype} ${devnum}:${distro_bootpart} idbloader.img; then
+  load ${devtype} ${devnum}:${distro_bootpart} ${kernel_addr_r} idbloader.img
+
+  # erase flash
+  run blink_power blink_power
+  sf erase 8000 3e8000
+
+  # write flash
+  run blink_power blink_power blink_power
+  sf write ${kernel_addr_r} 8000 ${filesize}
+
+  # blink forever
+  while true; do run blink_power; sleep 1; done
+else
+  # blink forever
+  echo "missing idbloader.img or idbloader_spl.img"
+  while true; do run blink_standby; sleep 1; done
+fi