From: Tang Yuantian-B29983 <Yuantian.Tang@freescale.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [U-Boot, 2/3] mpc85xx: Add deep sleep framework support
Date: Mon, 24 Feb 2014 14:44:52 +0800 [thread overview]
Message-ID: <530AEA64.5010606@freescale.com> (raw)
In-Reply-To: <1392664709.6733.627.camel@snotra.buserror.net>
On 2014/2/18 ??? 3:18, Scott Wood wrote:
> On Sun, 2014-02-16 at 21:35 -0600, Tang Yuantian-B29983 wrote:
>>> -----Original Message-----
>>> From: Wood Scott-B07421
>>> To: Tang Yuantian-B29983
>>> Cc: Sun York-R58495; Li Yang-Leo-R58472; u-boot at lists.denx.de; Kushwaha
>>> Prabhakar-B32579; Jin Zhengxiong-R64188
>>> Subject: Re: [U-Boot,2/3] mpc85xx: Add deep sleep framework support
>>>
>>> On Thu, 2014-02-13 at 02:12 -0600, Tang Yuantian-B29983 wrote:
>>>>> Use an I/O accessor.
>>>> In_be64?? No such function.
>>> Why do you need in_be64() rather than two in_be32()s?
>>>
>> Avoid ECC error. Although, according to my test, in_be32() works too.
> Why would you get an ECC error?
>
> -Scott
DDR operation is always in 64bits. if writing a 32bits to memory, you
need to
read a 32bits first, and combine it to form a 64bits. when the new
64bits is written
to memory, ECC occurs.
I was required to do so by hardware team.
Regards,
Yuantian
>
next prev parent reply other threads:[~2014-02-24 6:44 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-26 6:00 [U-Boot] [PATCH 1/3] mpc85xx: Add support for the supplement configuration unit register Tang Yuantian
2014-01-26 6:00 ` [U-Boot] [PATCH 2/3] mpc85xx: Add deep sleep framework support Tang Yuantian
2014-02-13 0:44 ` [U-Boot] [U-Boot, " Scott Wood
[not found] ` <07dc877206434a4ea634d912c02da3a5@BL2PR03MB115.namprd03.prod.outlook.com>
2014-02-14 22:21 ` Scott Wood
2014-02-24 7:47 ` Tang Yuantian-B29983
2014-02-24 19:11 ` Scott Wood
2014-02-26 7:49 ` Tang Yuantian-B29983
2014-02-26 8:13 ` Tang Yuantian-B29983
[not found] ` <c321feb926884bca922904aec215fdff@BL2PR03MB115.namprd03.prod.outlook.com>
2014-02-14 22:59 ` Scott Wood
2014-02-17 9:18 ` [U-Boot] test Tang Yuantian
[not found] ` <95751c79b09a4a15a7b4d577fd86ff3e@BL2PR03MB115.namprd03.prod.outlook.com>
2014-02-17 19:18 ` [U-Boot] [U-Boot, 2/3] mpc85xx: Add deep sleep framework support Scott Wood
2014-02-24 6:44 ` Tang Yuantian-B29983 [this message]
2014-02-24 19:11 ` Scott Wood
2014-02-26 5:52 ` Tang Yuantian-B29983
2014-01-26 6:00 ` [U-Boot] [PATCH 3/3] mpc85xx: Add deep sleep support on T1040QDS Tang Yuantian
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=530AEA64.5010606@freescale.com \
--to=yuantian.tang@freescale.com \
--cc=u-boot@lists.denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.