Hi Marek,
On Sat, 7 Jul 2012 09:59:52 +0200, Marek Vasut marek.vasut@gmail.com wrote:
Dear Aneesh V,
Hi Marek,
On 07/06/2012 04:32 PM, Tetsuyuki Kobayashi wrote:
Hello,
On 2012/07/07, at 8:02, Marek Vasut wrote:
Dear Aneesh V,
Enable -march=armv7-a for armv7 platforms if the tool-chain supports it. This in turn results in Thumb-2 code generated for these platforms if CONFIG_SYS_THUMB_BUILD is enabled.
Signed-off-by: Aneesh Vaneesh@ti.com
For some reason, this patch breaks USB EHCI on mx51 efika boards. The board just freezes instead of detecting USB devices. Reverting this patch fixes the issue.
Note I use gcc 4.7.1 (!), might be compiler issue?
Tom, can you try on one of your beagle-dogs please? :)
Just for your information, I doubt unaligned access causes this problem.
My investigation is here, http://lists.denx.de/pipermail/u-boot/2012-June/127020.html My patch [PATCH] arm: armv7: add compile option -mno-unaligned-access if
available
This makes sense. You might want to try this patch. Also, to be sure that it's nothing to do with Thumb you can make sure you are not enabling CONFIG_SYS_THUMB_BUILD.
Ok, I think the patch should be applied then ?
but what if the option isn't available?
If I am not mistaken, from an analysis standpoint, on compilers where the option is unavailable, there is no issue regarding alignment; and from a solution standpoint... We'll need to add the option only when cross-compiler version is known to honor it.
Best regards, Marek Vasut
Amicalement,