Build U-Boot argements and boot from initramfs

[jupiter_hce]

Hi,

Could anyone give an example of which Yocto configure statements to make an imx6 image in initramfs format and u-boot with arguments such as as bootargs and bootcmd, to boot it from imx6 RAM?

[igorpadykov]

Hi jupiter

seems such configuration is used by Mfg Tool so one can try procedure

described in sect.6.2 Manufacturing Tool, MFGTool attached Yocto Guide.

Best regards
igor
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[jupiter_hce]

Hi igorpadykov,

Thanks for your response, did you mean Yocto Guide at Yocto Project Mega-Manual ? That sec 6.2 is for different topic (6.2. Preparing the Build Host). What are variables in Yocto to generate zImage-initramfs? I add following variables to the local.conf:

UBOOT_CONFIG = "ram"
INITRAMFS_IMAGE_BUNDLE = "1"
DISTRO_FEATURES_append = " ram"
IMAGE_FSTYPES_append = " cpio.xz"

But the images are still not for ramdisk:

$ ls deploy/images/imxevk:

dev-image.rootfs.cpio.xz
u-boot.imx-ram
zImage.bin

.....

The dev-image.rootfs.cpio.xz is a full rootfs including the /boot/zImage, but the zImage is not initramfs or ramdisk formatted, there were errors when I run uuu to download them to the imx6 RAM? What the Yocto configure can generate zImage-initramfs?

Thank you very much.

Kind regards,

- jupiter

[jupiter_hce]

Oh, I found it is in the document i.MX Yocto Project User's Guide, 01/2018, not the 2019. I know how to use the imx mfg tool, my problem is I stuck to generate zImage-initramfs. Appreciate your advice. Thank you

[igorpadykov]

also one can look at suggestions provided on

Yocto initramfs 

Best regards
igor