Date: Mon, 29 Jun 2009 15:07:31 +0200 From: Piotr =?utf-8?q?Zi=C4=99cik?= <kosmo@semihalf.com> To: Hans Petter Selasky <hselasky@c2i.net> Cc: freebsd-arm@freebsd.org, freebsd-usb@freebsd.org, thompsa@freebsd.org Subject: Re: CPU Cache and busdma usage in USB Message-ID: <200906291507.31594.kosmo@semihalf.com> In-Reply-To: <200906291337.43635.hselasky@c2i.net> References: <200906231035.43096.kosmo@semihalf.com> <200906291249.43983.kosmo@semihalf.com> <200906291337.43635.hselasky@c2i.net>
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Monday 29 June 2009 13:37:41 Hans Petter Selasky napisa=C5=82(a):
> if (op & BUS_DMASYNC_POSTREAD) {
> if (bpage->vaddr_nocache =3D=3D 0) {
> cpu_dcache_inv_range(bpage->vaddr,
> bpage->datacount);
> cpu_l2cache_inv_range(bpage->vaddr,
> bpage->datacount);
> }
> bcopy((void *)(bpage->vaddr_nocache !=3D 0 ?
> bpage->vaddr_nocache : bpage->vaddr),
> (void *)bpage->datavaddr, bpage->datacount);
> dmat->bounce_zone->total_bounced++;
> }
>
> Change: bpage->vaddr into (bpage->vaddr & ~arm_dcache_align_mask)
> Change: bpage->datacount into (bpage->datacount + (bpage->vaddr &
> arm_dcache_align_mask) + arm_dcache_align_mask - 1) &
> ~arm_dcache_align_mask;
I have checked above changes and I do not observe any changes
is USB behaviour. Problem still exists.
=2D-=20
Best Regards.
Piotr Ziecik
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