From a02c971dff934a11ddadf7ffd850dabcab5a3cdf Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Wed, 3 Nov 2021 18:12:05 +0100 Subject: [PATCH] bcm4908: start work on images for devices using U-Boot MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit New BCM4908 family based routers will use U-Boot bootloader. That will require using a totally different firmware format. Kernel has to be put in a FIT image. OpenWrt has some helpers for generating .its files but they don't fit BCM4908 requirements and there is no simple way of extending any of them. The best solution seems to be storing an .its template. BCM4908 bootfs may: 1. contain extra binaries (other than kernel & DTB) 2. include multiple DTB files 3. store device specific U-Boot configurations with custom properties Such setups are too complex to generate using shell script. Raw .its file on the other hand seems quire clean & reasonable. Signed-off-by: Rafał Miłecki --- target/linux/bcm4908/image/Makefile | 11 ++++++++ target/linux/bcm4908/image/bootfs-generic.its | 25 +++++++++++++++++++ 2 files changed, 36 insertions(+) create mode 100644 target/linux/bcm4908/image/bootfs-generic.its diff --git a/target/linux/bcm4908/image/Makefile b/target/linux/bcm4908/image/Makefile index 426db4c5a67..929e626e0eb 100644 --- a/target/linux/bcm4908/image/Makefile +++ b/target/linux/bcm4908/image/Makefile @@ -6,6 +6,17 @@ include $(INCLUDE_DIR)/image.mk DEVICE_VARS += ASUS_PRODUCTID ASUS_BUILD_NO ASUS_FW_REV ASUS_EXT_NO DEVICE_VARS += NETGEAR_BOARD_ID NETGEAR_REGION +define Image/Prepare + cp bootfs-generic.its $(KDIR)/ +endef + +define Build/bootfs + cat $@ | $(STAGING_DIR_HOST)/bin/lzma e -eos -si -so > $@.tmp + mv $@.tmp $@ + sed -i "s=\$${kernel}=$@=" $(KDIR)/bootfs-generic.its + PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage -f $(KDIR)/bootfs-generic.its $(KDIR)/bootfs-generic.itb +endef + define Build/bcm4908asus $(STAGING_DIR_HOST)/bin/bcm4908asus create -i $@ \ -p $(ASUS_PRODUCTID) -b $(ASUS_BUILD_NO) -f $(ASUS_FW_REV) \ diff --git a/target/linux/bcm4908/image/bootfs-generic.its b/target/linux/bcm4908/image/bootfs-generic.its new file mode 100644 index 00000000000..d2f19ed7523 --- /dev/null +++ b/target/linux/bcm4908/image/bootfs-generic.its @@ -0,0 +1,25 @@ +// SPDX-License-Identifier: GPL-2.0-or-later OR MIT + +/dts-v1/; + +/ { + description = "OpenWrt bootfs image"; + #address-cells = <1>; + + images { + kernel { + description = "Linux kernel"; + data = /incbin/("${kernel}"); + type = "kernel"; + os = "linux"; + arch = "arm64"; + compression = "lzma"; + load = <0x80000>; + entry = <0x80000>; + + hash-1 { + algo = "sha256"; + }; + }; + }; +};