From: Dan Malek <dan@mvista.com>
To: Peter Desnoyers <pdesnoyers@chinook.com>
Cc: "Justin (Gus) Hurwitz" <ghurwitz@dyndns.com>,
Daris A Nevil <dnevil@snmc.com>,
linuxppc-embedded@lists.linuxppc.org
Subject: Re: Non-cacheable memory
Date: Fri, 10 Aug 2001 23:47:40 -0400 [thread overview]
Message-ID: <3B74AADC.C2CE7B89@mvista.com> (raw)
In-Reply-To: 3B72E40D.3080600@chinook.com
Peter Desnoyers wrote:
> ..... It returns a virtual address plus a DMA
> address in an arg ptr - throw away the DMA address, as that's
> PCI-specific, and run the virtual address through virt_to_phys().
Ummm...damn, that's a tricky one. On 8xx, the intention is to use
the DMA address for stuffing into the CPM. The virt_to_* functions
are on their way out (on all platforms), and everyone should use the
DMA address returned by the consistent_alloc function. I guess if you
have a 8xx/PCI that doesn't map PCI masters to system memory at zero,
you are kind of hosed at the moment........
-- Dan
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2001-08-11 3:47 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-07 18:49 Non-cacheable memory Justin (Gus) Hurwitz
2001-08-07 15:59 ` Tom Roberts
2001-08-07 18:34 ` Daris A Nevil
2001-08-09 22:49 ` Justin (Gus) Hurwitz
2001-08-09 19:27 ` Peter Desnoyers
2001-08-11 3:47 ` Dan Malek [this message]
2001-08-13 15:47 ` Peter Desnoyers
2001-08-14 21:26 ` Dan Malek
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