On 06/15/2012 08:18 AM, R, Sricharan wrote: > Hi, > [snip..] >>>>> If it is a problem with unaligned regions, then that is the only >>>>> thing to be fixed >>>>> right ?. Just trying to understand why this change is required ? >>>> >>>> The problem is that within the USB/network/filesystem stacks we have a >>>> lot of not cache safe alignments apparently. Without this every '#' of >>>> a tftp gives a screen full of error printfs. So tftp'ing a kernel takes >>>> minutes, not seconds, to complete. >>>> >>> Ok,but when buffers are not aligned >>> isn't that you are going to have coherency problems ? >> >> Exactly. USB requires dcache to be turned off today. With it turned >> off it spams these messages making tftp to an aligned address take >> minutes because the console is busy printing all of these messages about >> flushes it didn't need to do. The alternative is to build >> omap4/omap5/etc with dcache disabled or USB disabled. >> > Ok, but who is calling cache maintenance in your case after > turning off caches ?
The USB stack currently. -- Tom _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
