From: mkl0301@gmail.com (Lin Mac)
To: linux-arm-kernel@lists.infradead.org
Subject: Booting CNS3420 EVB v 1.3 failed with 2.6.36 (and 2.6.35)
Date: Wed, 10 Nov 2010 12:00:36 +0800 [thread overview]
Message-ID: <AANLkTikF+QMcm0cnn0QUOMJaLb=BTbQZA2oCVas4-71q@mail.gmail.com> (raw)
In-Reply-To: <20101109101433.GA17423@oksana.dev.rtsoft.ru>
2010/11/9 Anton Vorontsov <cbouatmailru@gmail.com>:
>> BTW, the default boot command includes root=/dev/mmcblk0p1, but
>> CONFIG_MMC_SDHCI_CNS3XXX is not enabled.
>> Even if it is enabled, I got a crash once mounted. It works fine
>> without L1 cache enabled (CONFIG_CPU_ICACHE_DISABLE,
>> CONFIG_CPU_DCACHE_DISABLE). So it seems there are some cache coherency
>> issue on the SDHC device.
> I recalling I observed something like this, and it was somehow
> related to the memory setup. The old (Jan 20 2010) U-Boot that
> I used was configuring RAM incorrectly, and caches were just
> unveiling the problem.
I was using vanilla kernel. And I just found that Catalin's patches
for cache maintenance changes is not in vanilla kernel. Using
Catalin's kernel fixed this issue. It is due to the SDHCI driver is in
PIO mode, and hit the cache coherency issue with PIO mode.
Best Regards,
Mac Lin.
next prev parent reply other threads:[~2010-11-10 4:00 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-05 3:08 Booting CNS3420 EVB v 1.3 failed with 2.6.36 (and 2.6.35) Lin Mac
2010-11-05 7:44 ` Anton Vorontsov
2010-11-09 7:12 ` Lin Mac
2010-11-09 10:14 ` Anton Vorontsov
2010-11-09 10:35 ` Russell King - ARM Linux
2010-11-10 4:07 ` Lin Mac
2010-11-11 1:55 ` Lin Mac
2010-11-10 4:00 ` Lin Mac [this message]
2010-11-09 7:46 ` Lin Mac
2010-11-12 14:32 ` Russell King - ARM Linux
2010-11-14 21:58 ` Lin Mac
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='AANLkTikF+QMcm0cnn0QUOMJaLb=BTbQZA2oCVas4-71q@mail.gmail.com' \
--to=mkl0301@gmail.com \
--cc=linux-arm-kernel@lists.infradead.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).