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authorRafał Miłecki <rafal@milecki.pl>2021-11-03 18:12:05 +0100
committerRafał Miłecki <rafal@milecki.pl>2021-12-13 14:33:07 +0100
commit027dd3c50bd5f9912b28203e56ae4a21fe266739 (patch)
treed69b7955f767e2009747c8ba955ad97cd4cadd34 /target
parent2c1f27bf4bb2b2a90a326c2ae75ac5bdc6b47074 (diff)
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bcm4908: start work on images for devices using U-Boot
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 <rafal@milecki.pl> (cherry picked from commit a02c971dff934a11ddadf7ffd850dabcab5a3cdf)
Diffstat (limited to 'target')
-rw-r--r--target/linux/bcm4908/image/Makefile11
-rw-r--r--target/linux/bcm4908/image/bootfs-generic.its25
2 files changed, 36 insertions, 0 deletions
diff --git a/target/linux/bcm4908/image/Makefile b/target/linux/bcm4908/image/Makefile
index 015897cd99..cbbbcbb526 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 $(ASUS_FW_REV) \
diff --git a/target/linux/bcm4908/image/bootfs-generic.its b/target/linux/bcm4908/image/bootfs-generic.its
new file mode 100644
index 0000000000..d2f19ed752
--- /dev/null
+++ b/target/linux/bcm4908/image/bootfs-generic.its
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+/dts-v1/;
+
+/ {
+ description = "OpenWrt bootfs image";
+ #address-cells = <1>;
+
+ images {
+ kernel {
+ description = "Linux kernel";
+ data = /incbin/("${kernel}");
+ type = "kernel";
+ os = "linux";
+ arch = "arm64";
+ compression = "lzma";
+ load = <0x80000>;
+ entry = <0x80000>;
+
+ hash-1 {
+ algo = "sha256";
+ };
+ };
+ };
+};