Hi All,
There is a potential issue on 7260 which may result in wiping out
RedBoot if 2.6 is used on the board with default settings.
The 2.6 Linux root partition overlaps with the RedBoot partition
defined for 2.4
This is what is printed out when 2.4 is starting:
Using static partition definition
Creating 3 MTD partitions on "NAND 32MiB 3,3V 8-bit":
0x00000000-0x00004000 : "TS-BOOTROM"
0x00004000-0x01d04000 : "Linux"
0x01d04000-0x02000000 : "RedBoot"
And this is printed out when 2.6 is starting:
Using static partition definition
Creating 3 MTD partitions on "ts7250-nand":
0x00000000-0x00020000 : "TS-BOOTROM"
0x00020000-0x01d20000 : "Linux"
0x01d20000-0x0201c000 : "RedBoot"
mtd: partition "RedBoot" extends beyond the end of device
"ts7250-nand" -- size truncated to 0x2e0000
The memory definition found in
linux-2.6.whatever/drivers/mtd/nand/ts7250.c is inconsistent with 2.4
This is the offending structure:
/*
* Define static partitions for flash device
*/
static struct mtd_partition partition_info32[] = {
{
.name = "TS-BOOTROM",
.offset = 0x00000000,
.size = 0x00020000,
}, {
.name = "Linux",
.offset = 0x00020000,
.size = 0x01d00000,
}, {
.name = "RedBoot",
.offset = 0x01d20000,
.size = 0x002fc000,
},
};
After adjusting the settings to reflect the reality (on the flash) the
error message about truncation has disappeared.
However:
There is still something wrong possibly with the yaffs settings and I
cannot use both versions of the kernel to access the same data on
Flash. I may not need to do so since I have other options in my
project but if I make it working I will obviously post an update.
Regards,
Adam
--- In "j.chitte" <> wrote:
>
> --- In "j.chitte" <j.chitte@> wrote:
> >
> > new topic ??
> >
>
> A finally conviced this dumb-assed group software to create a new
> topic when I click "Start topic".
>
> now where were we ??
>
>
>
> --- In "bsmuck2000" <bsmucker@> wrote:
> >
> > (Hopefully this is a new thread this time)
>
> Well, it isn't yet ...
>
> >
> > Hello,
> >
> > We are working at transitioning our ts7260-based system to using
> the 2.6
> > kernel (right now the one supplied by Technologics. One problem that
> > I'm running into is that when I boot to 2.6, the yaffs2 file system
> on
>
> Was the ts-7260 delivered with YAFFS or YAFFS2? IIRC, YAFFS2 was used
> only for the larger flash sizes (2k page sizes).
>
> > the flash is not visible. I can mount it fine, but nothing is there.
>
> Anything in the kernel log after the mount or attempted read?
>
> > If I rewrite the filesystem while in 2.6, it works fine, but when I
> boot
> > back into 2.4, it again shows a blank filesystem.
> >
> > Is anyone aware of this incompatibility and how to fix it?
>
> Check the YAFFS2 build options on the 2.4 config, and make sure your
> 2.6 version is configured the same or at least backwards compatible.
>
> Especially look at YAFFS_AUTO_YAFFS2, YAFFS_YAFFS2,
> YAFFS_DISABLE_WIDE_TNODES, and their help text in Kconfig. If you are
> mixing yaffs and yaffs2, these config options can help make this
> transparent.
>
> You can also turn on some debugging options in yaffs_fs.c (need to
> recompile).
>
> >
> > For the transition time, it is essential that we be able to access
> the
> > yaffs filesystem from both 2.4 and 2.6.
> >
> > Thanks,
> >
> > Brian
> >
>
> Regards, .......... Charlie
>
>
>
>
> Thu May 29, 2008 8:52 pm
>
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> "charliem_1216" <charliem_1216@>
> charliem_1216
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