From: Tom Rini <trini@ti.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] eMMC boot partition support in uboot
Date: Thu, 5 Dec 2013 14:09:07 -0500 [thread overview]
Message-ID: <20131205190907.GP420@bill-the-cat> (raw)
In-Reply-To: <52A0CA10.1040007@ruggedcom.com>
On Thu, Dec 05, 2013 at 01:46:40PM -0500, Richard Retanubun wrote:
> Hi guys,
>
> Recap: I am trying to boot MLO + uboot from eMMC boot partition on DRA7xx_EVM eval platform.
> SW-Baseline: uboot p-ti-uboot-2013.04 & p-ti-linux-3.8.y from omapzoom.
Please note that this list is for the mainline U-Boot tree, and to
contact your TI reps for help with the TI trees. I'm answering in
general since I know how the mainline code works, and what I suspect
needs doing there in general to allow what you want to work:
[snip]
> 3. I realize that the MLO contents (using uboot/tools/omapimage?) needed to say
> MMCSD_MODE_RAW for my platform. I am bypassing this problem by by hard coding the response
> arch/arm/cpu/armv7/omap-common/boot-common.c::spl_boot_mode() to always says MMCSD_MODE_RAW.
> This seems to work and I am past the hang() code.
It's possible that the ROM simply doesn't support a dos-style partition
table and a FAT partition on the eMMC boot partition so the right answer
here is to do what you're doing and hard-code raw only. I strongly
suspect this to be true, even.
> 4. Now, MLO is ready to (raw) load uboot binary from the eMMC boot partition (i.e. /dev/mmcblk1boot0).
> Unfortunately, at this point I don't know how to make the platform recognize the eMMC boot partitions.
> I think they are not modelled yet in uboot. Only the User-Data-Area (UDA)
> is recognized in uboot (called mmc 1)
Not quite true, no. You'll need code similar to what we have in
common/env_mmc.c to switch the partition to the boot partition.
--
Tom
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next prev parent reply other threads:[~2013-12-05 19:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-05 18:46 [U-Boot] eMMC boot partition support in uboot Richard Retanubun
2013-12-05 19:09 ` Tom Rini [this message]
2013-12-05 20:21 ` Richard Retanubun
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