From: Ilya Yanok <yanok@emcraft.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 5/7] omap_gpmc: use SOFTECC in SPL if it's enabled
Date: Fri, 28 Oct 2011 00:27:50 +0400 [thread overview]
Message-ID: <4EA9BEC6.8080207@emcraft.com> (raw)
In-Reply-To: <4EA152C9.1040407@gmail.com>
Hi Simon,
On 21.10.2011 15:08, Simon Schwarz wrote:
>>>> Use software ECC for the SPL build if support for software ECC in
> SPL is
>>>> enabled.
>>>
>>> I'am curious: Is there a special reason for having software ecc in SPL?
>>
>> Well, yes. On OMAP2+ ECC mode defaults to software (incompatible with HW
>> mode; 256 vs 512 bytes block size) both in U-Boot and Linux (U-Boot has
>> command to change it while in Linux you have to recompile the kernel).
>>
>> So we need software ecc to read images written from Linux.
>
> ok. Agreed.
>
> Another thing just poped into my mind, ATM I have a DMA patch for
> devkit8000 on the ML:
> http://article.gmane.org/gmane.comp.boot-loaders.u-boot/109744
> http://article.gmane.org/gmane.comp.boot-loaders.u-boot/112661
Yes, I've seen this patch.
> It speeds up the process of copying the u-boot/linux image. ATM this is
> in combination with HW ecc and I doubt that it will work seamlessly with
> SW-ecc, yet. However IMHO DMA in combination with SW-ecc could be nearly
> as fast as using HW-ecc.
>
> So maybe an adaption is worth a try?
Uh.. Had no time to look at it last days... I'll try to take a look at
it this weekend.
Regards, Ilya.
next prev parent reply other threads:[~2011-10-27 20:27 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-17 23:33 [U-Boot] [PATCH 0/7] NAND SPL support for mcx board Ilya Yanok
2011-10-17 23:33 ` [U-Boot] [PATCH 1/7] omap3/emif4: fix registers definition Ilya Yanok
2011-10-17 23:33 ` [U-Boot] [PATCH 2/7] omap/spl: don't assume u-boot.bin size, use CONFIG_SYS_NAND_U_BOOT_SIZE Ilya Yanok
2011-10-17 23:43 ` Tom Rini
2011-10-17 23:50 ` Ilya Yanok
2011-10-31 12:38 ` Ilya Yanok
2011-10-31 14:43 ` Tom Rini
2011-10-17 23:33 ` [U-Boot] [PATCH 3/7] omap/spl: actually enable the console Ilya Yanok
2011-10-19 19:24 ` Tom Rini
2011-10-31 12:39 ` Ilya Yanok
2011-10-31 14:44 ` Tom Rini
2011-10-17 23:33 ` [U-Boot] [PATCH 4/7] nand_spl_simple: add support for software ECC Ilya Yanok
2011-10-17 23:33 ` [U-Boot] [PATCH 5/7] omap_gpmc: use SOFTECC in SPL if it's enabled Ilya Yanok
2011-10-20 12:00 ` Simon Schwarz
2011-10-20 15:23 ` Ilya Yanok
2011-10-21 11:08 ` Simon Schwarz
2011-10-27 20:27 ` Ilya Yanok [this message]
2011-10-31 17:30 ` Ilya Yanok
2011-10-17 23:33 ` [U-Boot] [PATCH 6/7] nand_spl_simple: store temp data at CONFIG_SPL_NAND_WORKSPACE Ilya Yanok
2011-10-17 23:33 ` [U-Boot] [PATCH 7/7] mcx: NAND SPL support Ilya Yanok
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