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Ciao Pesà,<BR>
<BR>
U-Boot can load an image from a jffs2 fs using the fsload command:<BR>
<BR>
<TT>fsload DEST_ADDR imagename</TT><BR>
<BR>
Furthermore, you need to properly define the mtdpart and mtdids environment vars or define the opportune #define, like this:<BR>
<BR>
<TT>#define MTDIDS_DEFAULT "nor0=phys_mapped_flash"</TT><BR>
<TT>#define MTDPARTS_DEFAULT "mtdparts=phys_mapped_flash:2M(jffs2),10M(root)ro,2M(u-boot)ro,2M(kernel)ro"</TT><BR>
<BR>
ciao,<BR>
<BR>
luigi<BR>
<BR>
Il giorno sab, 14/06/2008 alle 11.48 +0200, Giuseppe Modugno ha scritto:
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<PRE>
Hi all,
this is my first post in this mailing list. I hope I don't start with a FAQ.
On my board I have installed U-Boot and I'm able to run Linux kernel and
rootfs via Flash/Flash (ramdisk/image file) or TFTP/NFS.
Of course, either ramdisk and nfs aren't suitable for my end application
(ramdisk losts many RAM space and NFS won't be available).
So I'd like to use a local root filesystem stored in the NOR Flash (a
J30 Intel), starting from the small ramdisk I have and adding all
software I need.
I could divide my Flash memory in three partitions:
- U-Boot bootloader (with the two sectors for its configuration)
- Linux kernel image
- JFFS2 root filesystem
But I want to go futher and I want to save the linux kernel image file
into the root JFFS2 filesystem. So I'll have only two main partitions:
- U-Boot bootloader (...)
- JFFS2 root filesystem (with linuk kernel image file saved inside)
Is U-Boot able to run a kernel image file that is saved into a JFFS2
filesystem stored in the Flash? I think this is what happens on a
desktop computer (where the bootloader is Grub and the root filesystem
is on a hard-disk and the kernel is a file saved into it).
I think it isn't so simple for U-Boot that is capable of running the
application (linux kernel in my case) only at a specified memory address
(it doesn't have any knowledge about JFFS2 filesystem, do it?).
Many thanks for your comments and my compliments for the good work!
Giuseppe
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