From: Segher Boessenkool <segher@kernel.crashing.org>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Olaf Hering <olh@suse.de>,
Linux Kernel list <linux-kernel@vger.kernel.org>,
Paul Mackeras <paulus@samba.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: reserve legacy io regions on powermac
Date: Wed, 21 Jul 2004 19:08:56 +0200 [thread overview]
Message-ID: <A688227A-DB38-11D8-9CDF-000A95A4DC02@kernel.crashing.org> (raw)
In-Reply-To: <Pine.GSO.4.58.0407211746200.8147@waterleaf.sonytel.be>
>>>> I think the simplest fix for 2.6 is a request_region of the
>>>> problematic
>>>> areas.
>>>
>>> Note that this is still all workarounds... Nothing prevents you (and
>>> some
>>> people actually do that) to put a PCI card with legacy serial ports
>>> on it
>>> inside a pmac....
>>
>> Sure, but will that use the same io ports? I dont have one to verify
>> it.
>
> If it's a `clean' PCI card, it will use the PCI BARs, and there's no
> problem.
There is nothing that prevents the OF to allocate addresses in the
"legacy"
range to the PCI cards. In fact, the normal strategy is to allocate
starting at zero, and going upward, so 0x60 (which is one of the
"disallowed"
addresses in Olaf's patch) is pretty easy to hit.
Segher
next prev parent reply other threads:[~2004-07-21 17:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-21 9:12 Olaf Hering
2004-07-21 14:51 ` Benjamin Herrenschmidt
2004-07-21 14:56 ` Olaf Hering
2004-07-21 15:48 ` Geert Uytterhoeven
2004-07-21 17:08 ` Segher Boessenkool [this message]
2004-07-21 20:07 ` Jesse Barnes
2004-07-22 8:21 ` Segher Boessenkool
2004-07-23 14:21 ` Olaf Hering
2004-07-23 16:44 ` Olaf Hering
2004-07-22 0:59 Albert Cahalan
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