On Thu, Sep 30, 2010, Shawn Guo wrote:
> I'm unsure if OMAP ROM will be unhappy if the FAT partition is not at
> the beginning.
According to the docs, OMAP ROM searches for a FAT partition with the
bootable flag turned on. It certainly doesn't care (too much) about
the location of the partition. I added a non-FS data partition in the
bzr version now, and factored your code with the general case.
> The u-boot.imx really needs to be at offset 1KB on card to make imx51
> ROM happy. Even I create the "non-FS data" partition from 0 cylinder
> with sfdisk, it actually starts from sector 63 (offset ~ 32KB). We
> can not really get the u-boot.imx into this partition for now.
Sounds like a bug in sfdisk. I guess we need to move to parted at some
point.
> >> + cat > ${TMP_DIR}/boot.cmd << BOOTCMD
> >> +setenv bootcmd 'fatload mmc 0:1 0x90000000 uImage; fatload mmc 0:1
> >> 0x90800000 uInitrd; bootm 0x90000000 0x90800000'
> >
> > no mmc init?
> >
> This is something I'm not very clear. This bootcmd is written into
> boot.scr which has to be loaded out from card first, in order to
> launch the bootcmd. So we need to get "mmc init" executed before we
> load fatload boot.scr.
Hmm you're right; I was wondering because the other boards at one, but
these boards need to drop it! Fixed
> Maybe it's an issue. The u-boot.imx "mmc init" is not working in this
> case. I have to run "mmcinfo" before the first fatload, or it hangs.
If "mmc init" breaks in mx51evk u-boot, we should probably fix it; you
could start by filing a bug against u-boot-linaro to track this,
explaining how to trigger the bug.
--
Loïc Minier
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