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ath79: mikrotik: use OpenWrt loader for initram image

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Return to using the OpenWrt kernel loader to decompress and load kernel
initram image.

Continue to use the vmlinuz kernel for squashfs.

Mikrotik's bootloader RouterBOOT on some ath79 devices is
failing to boot the current initram, due to the size of the initram image.

On the ath79 wAP-ac:
a 5.7MiB initram image would fail to boot
After this change:
a 6.6MiB initram image successfully loads

This partially reverts commit e91344776b.

An alternative of using RouterBOOT's capability of loading an initrd ELF
section was investigated, but the OpenWrt kernel loader allows larger image.

Signed-off-by: John Thomson <git@johnthomson.fastmail.com.au>
This commit is contained in:
John Thomson 2022-05-19 09:18:20 +10:00 committed by Hauke Mehrtens
parent 9423fc424c
commit 62b72eafe4
1 changed files with 3 additions and 1 deletions
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4
target/linux/ath79/image/common-mikrotik.mk
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@ -1,8 +1,10 @@
define Device/mikrotik
DEVICE_VENDOR := MikroTik
LOADER_TYPE := elf
KERNEL_NAME := vmlinuz
KERNEL := kernel-bin | append-dtb-elf
KERNEL_INITRAMFS := kernel-bin | append-dtb-elf
KERNEL_INITRAMFS_NAME := vmlinux-initramfs
KERNEL_INITRAMFS := kernel-bin | append-dtb | lzma | loader-kernel
endef
define Device/mikrotik_nor