[U-Boot-Users] Performance in Booting Linux w/ Device Tree via U-Boot out of JFFS2 on NAND

[Grant Erickson <gerickson@nuovations.com>]

On 6/26/08 8:33 AM, Mark Craske wrote:
> I  have a custom board that only has NAND flash, so my JFFS2 file systems are
> in NAND.
>  
> You say in your mail item of Fri, 07 Mar 2008 17:09:42 -0800 that you are
> using
> u-boot/fs/jffs2/jffs2_nand_1pass.c from u-boot (1.3.2-rc3). However, when I
> change
> the u-boot/fs/jffs2/Makefile to build jffs2_nand_1pass.o instead of
> jffs2_1pass.o it
> does not build.
>  
> Have you modified jffs2_nand_1pass.c from the version in 1.3.2-rc3?

Mark:

At this point, for performance reasons, I abandoned any effort to use JFFS2
out of u-boot to boot images via 'fsload'.

So, as of today, I am running u-boot-1.3.3 and am booting a boot.itb
"multi-image" containing a compressed Linux kernel + FDT DTB out of NAND
using 'nboot':

    => printenv bootaddr bootcmd boot0 boot1
    bootaddr=800000
    bootcmd=run boot0 || run boot1 || reset
    boot0=nboot.i ${bootaddr} 0 0 && setenv bootargs root=/dev/mtdblock9 &&
        run addjffs2 addtty && bootm ${bootaddr}
    boot1=nboot.i ${bootaddr} 0 1C00000 && setenv bootargs
        root=/dev/mtdblock11 && run addjffs2 addtty && bootm ${bootaddr}

During the time I was evaluating JFFS2 on the AMCC PowerPC 405EXr Haleakala
board, I do not recall having any compilation issues or having to tweak the
build beyond the necessary CONFIG_/CFG_ settings.

Regards,

Grant