[U-Boot] [PATCH 2/4] net: fec_mxc: allow use with cache enabled

[Marek Vasut <marex@denx.de>]

Dear Eric Nelson,

> On 03/04/2012 06:49 PM, Marek Vasut wrote:
> >> On 03/02/2012 04:39 PM, Marek Vasut wrote:
> >>>> +			 * Invalidate data cache over the buffer
> >>>> +			 */
> >>>> +			addr = (uint32_t)frame;
> >>>> +			size = roundup(frame_length, 
CONFIG_FEC_DATA_ALIGNMENT);
> >>>> +			invalidate_dcache_range(addr, addr + size);
> >>> 
> >>> DTTO here, frame length might not be aligned properly, or will it be?
> >>> Network stack must be properly analyzed here.
> >> 
> >> The hardware won't return an unaligned value here, so this should be
> >> good.
> > 
> > Are you sure? You can't receive frame aligned to 8 bytes boundary?
> 
> Unless I'm missing something, received packet start addresses are defined
> by the driver in fec_rbd_init(), the code just modified to use memalign,
> so we're good here.

Ok, that's good then. I'll skim through this driver one more time tonight and 
see what comes out from it.

Best regards,
Marek Vasut