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ath79: GL-AR750S (NOR/NAND): limit factory.img kernel size to 2 MB

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The present U-Boot for GL-AR750S has a limit of 2 MB for kernel size.
While sysupgrade can manage kernels up to the present limit of 4 MB,
directly flashing a factory.img with a kernel size greater than 2 MB
through U-Boot will result in an unbootable device.

This commit uses the newly-introduced check-kernel-size build
operation to prevent the output of factory.img when the kernel
exceeds 2 MB in size, yet permits output of sysupgrade.img
as long as the kernel is within KERNEL_SIZE := 4096k

Cc: Chuanhong Guo <gch981213@gmail.com>

Signed-off-by: Jeff Kletsky <git-commits@allycomm.com>
This commit is contained in:
Jeff Kletsky 2019-11-13 13:09:49 -08:00 committed by John Crispin
parent f0b76d02e8
commit e96bfaedf3
1 changed files with 4 additions and 1 deletions
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5
target/linux/ath79/image/nand.mk
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@ -88,12 +88,15 @@ define Device/glinet_gl-ar750s-common
VID_HDR_OFFSET := 2048
endef
# NB: The kernel size is intentionally restricted at this time; see commit message
define Device/glinet_gl-ar750s-nor-nand
$(Device/glinet_gl-ar750s-common)
DEVICE_VARIANT := NOR/NAND
BLOCKSIZE := 128k
GL_UBOOT_UBI_OFFSET := 2048k
IMAGES += factory.img
IMAGE/factory.img := append-kernel | pad-to $$$$(KERNEL_SIZE) | append-ubi
IMAGE/factory.img := append-kernel | pad-to $$$$(GL_UBOOT_UBI_OFFSET) | \
append-ubi | check-kernel-size $$$$(GL_UBOOT_UBI_OFFSET)
IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
SUPPORTED_DEVICES += glinet,gl-ar750s-nor
endef