Hi Bjoern, I made a patch for include/image-commands.mk that allows to building squashfs initrd images. The reason for me is that the imagebuilder is unable to generate initramfs images. When building the final images with the imagebuilder you can define which packages to include. Your platform has to use device-tree!
That's the function:
# This take the vanilla kernel, modifies the bootarg of dtb and appends
# the filesystem to the kernel at the given initrd offset
# address (respect kernelsize!).
# Argument 1 : initrd offset
define Build/prepend-initrd-kernel
let \
initrd_offset="$(subst k,* 1024,$(word 1, $(1)))" \
rootfs_size="$$(stat -c%s $@)/4096*4096+4096" \
kernel_size="$$(stat -c%s $(KDIR)/$(KERNEL_NAME))" \
dtb_size_in="$$(stat -c%s $(KDIR)/image-$(firstword
$(DEVICE_DTS)).dtb )" \
kernel_dtb_size="kernel_size+dtb_size" \
initrd_virtual_addr="$(KERNEL_LOADADDR)+initrd_offset" ; \
if [ $$kernel_dtb_size -ge $$initrd_offset ] ; then \
echo initrd_offset is too small for kernel ; \
exit 1 ; \
fi ; \
bootargs=$$(printf "root=/dev/ram0 rd_start=0x%x rd_size=0x%x
ramdisk_size=0x%x $(wordlist 2,$(words $(1)),$(1))" \
$$initrd_virtual_addr $$rootfs_size $$rootfs_size ) ; \
cp $(KDIR)/$(KERNEL_NAME) [email protected] ; \
$(LINUX_DIR)/scripts/dtc/dtc -I dtb -O dts -o -
$(KDIR)/image-$(firstword $(DEVICE_DTS)).dtb | \
$(TOPDIR)/scripts/patch-dtb-bootargs.pl "$$bootargs" | \
$(LINUX_DIR)/scripts/dtc/dtc -I dts -O dtb -o - - >> [email protected] ; \
dd [email protected] [email protected] conv=sync bs=$$initrd_offset count=1 ; \
mv [email protected] [email protected] ; \
dd if=$@ bs=$$rootfs_size count=1 conv=sync >> [email protected] ; \
mv [email protected] $@
endef
Kernel needs following symbols:
CONFIG_BLK_DEV_INITRD=y
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=1
CONFIG_BLK_DEV_RAM_SIZE=0
This is the line for image/Makefile or ...
IMAGE/tftpboot-uImage-ramdisk.bin = append-rootfs | prepend-initrd-kernel
16777216 | lzma | uImage lzma
16777216 is the offset for the initrd in memory (take kernel size into
account), may be lowered for you.
Kind regards,
André
Am 08.04.20 um 09:26 schrieb Bjørn Mork:
> Tomasz Maciej Nowak <[email protected]> writes:
>
>> In include/kernel-defaults.mk there is
>> INITRAMFS_EXTRA_FILES ?=
>> $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt.
>> Maybe You could add a logic for ignore files list if they exist. No other
>> solution comes to my mind.
>
> Thanks for the suggestion. But I believe this file is used directly as
> config to the initramfs builder in the kernel. Extending the format
> would mean modifying usr/gen_init_cpio.c in the kernel. That's a bit
> overkill IMHO.
>
> I am probably ending up with the simplest solution: Dropping the large
> firmware package from DEVICE_PACKAGES. Making defconfig images usable
> for first-time installation is much more important than having every
> necessary package included in the defconfig sysupgrade images.
>
>
> Bjørn
>
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> https://lists.openwrt.org/mailman/listinfo/openwrt-devel
>
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