juno: download scp version 2.8

TF-A v2.4 and earlier is used with the SCP binaries provided in the
vexpress-firmware git. With TF-A v2.5 is supposed to use the SCP
binaries released at [1] instead. So update to download the SCP binaries
from [1] instead.

Link [1]: https://downloads.trustedfirmware.org/tf-a/css_scp_2.8.0/juno
Acked-by: Jerome Forissier <jerome@forissier.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
diff --git a/juno.mk b/juno.mk
index 81f3729..d508db5 100644
--- a/juno.mk
+++ b/juno.mk
@@ -20,22 +20,52 @@
 U-BOOT_PATH		?= $(ROOT)/u-boot
 U-BOOT_BIN		?= $(U-BOOT_PATH)/u-boot.bin
 
+SCP_BLX_URL		?= https://downloads.trustedfirmware.org/tf-a/css_scp_2.8.0/juno
+
 ################################################################################
 # Targets
 ################################################################################
-all: arm-tf u-boot linux optee-os buildroot
-clean: arm-tf-clean buildroot-clean u-boot-clean optee-os-clean
+all: scp-blx arm-tf u-boot linux optee-os buildroot
+clean: scp-blx-clean arm-tf-clean buildroot-clean u-boot-clean optee-os-clean
 
 include toolchain.mk
 
 ################################################################################
+# SCP BL1 and BL2
+################################################################################
+.PHONY: scp-blx
+scp-blx: $(ROOT)/out-firmware/scp_bl1.bin $(ROOT)/out-firmware/scp_bl2.bin
+
+.PHONY: scp-blx
+scp-blx-clean:
+	@rm -f $(ROOT)/out-firmware/scp_bl1.bin
+	@rm -f $(ROOT)/out-firmware/scp_bl2.bin
+	@rm -f $(ROOT)/out-firmware/tmp/scp_bl1.bin
+	@rm -f $(ROOT)/out-firmware/tmp/scp_bl2.bin
+
+define dlscp
+	@mkdir -p $(ROOT)/out-firmware/tmp
+	@rm -f $(ROOT)/out-firmware/tmp/$1
+	@rm -f $(ROOT)/out-firmware/$1
+	@(cd $(ROOT)/out-firmware/tmp/ && wget $(SCP_BLX_URL)/$1)
+	@(echo $2 $(ROOT)/out-firmware/tmp/$1 | sha256sum -c)
+	@(mv $(ROOT)/out-firmware/tmp/$1 $(ROOT)/out-firmware/$1)
+endef
+
+$(ROOT)/out-firmware/scp_bl1.bin:
+	$(call dlscp,scp_bl1.bin,1c690a7d93c82d39d18b720920ced7a712fdcfc744224b4f067e56013522fece)
+
+$(ROOT)/out-firmware/scp_bl2.bin:
+	$(call dlscp,scp_bl2.bin,533eb4a3f9d91e759b98288edf4c1441abe6f7fbc5da87825a8f1bb1b7942aa5)
+
+################################################################################
 # ARM Trusted Firmware
 ################################################################################
 TF_A_EXPORTS ?= \
 	CROSS_COMPILE="$(CCACHE)$(AARCH64_CROSS_COMPILE)"
 
 TF_A_FLAGS ?= \
-	SCP_BL2=$(ROOT)/vexpress-firmware/SOFTWARE/scp_bl2.bin \
+	SCP_BL2=$(ROOT)/out-firmware/scp_bl2.bin \
 	BL32=$(OPTEE_OS_HEADER_V2_BIN) \
 	BL32_EXTRA1=$(OPTEE_OS_PAGER_V2_BIN) \
 	BL32_EXTRA2=$(OPTEE_OS_PAGEABLE_V2_BIN) \
@@ -45,7 +75,7 @@
 	PLAT=juno \
 	SPD=opteed
 
-arm-tf: optee-os u-boot
+arm-tf: scp-blx optee-os u-boot
 	$(TF_A_EXPORTS) $(MAKE) -C $(TF_A_PATH) $(TF_A_FLAGS) all fip
 
 arm-tf-clean:
@@ -111,7 +141,7 @@
 flash: $(ROOT)/out-br/images/ramdisk.img
 	@test -n "$(JUNO_IP)" || \
 		(echo "JUNO_IP not set" ; exit 1)
-	$(FTP-UPLOAD) $(ROOT)/vexpress-firmware/SOFTWARE/scp_bl1.bin
+	$(FTP-UPLOAD) $(ROOT)/out-firmware/scp_bl1.bin
 	$(FTP-UPLOAD) $(TF_A_PATH)/build/juno/release/bl1.bin
 	$(FTP-UPLOAD) $(TF_A_PATH)/build/juno/release/fip.bin
 	$(FTP-UPLOAD) $(ROOT)/linux/arch/arm64/boot/Image