From: Benjamin Herrenschmidt <bh40@calva•net>
To: <mlan@cpu•lu>, <linuxppc-dev@lists•linuxppc.org>
Subject: Re: dual head r128
Date: Sat, 14 Oct 2000 12:13:10 +0200 [thread overview]
Message-ID: <19340908034454.27994@192.168.1.10> (raw)
In-Reply-To: <200010132147.XAA00867@piglet.grunz.lu>
>No, the regions are larger. Apple's doc talks about '23 bits of IO
>space', which is 8M, at least for the first-generation bridges (bandit,
>that is).
>
>Anyway, the best way to find out the size of this region (unless you can
>read it from the bridge) is to look at the OF device tree, and the
>bridge's region properties.
Well, if IO decoding works like memory decoding on those bridges, then
yes, the region size is either 256 or 16Mb (large or sparse decoding).
The way it's currently setup by the BIOS, I beleive it's 16Mb. It's
possible that only 8MB out of the 16 are actually useable, we really lack
documentation about those chips.
Ben.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2000-10-14 10:13 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.10.10010132302530.381-100000@cassiopeia.home>
2000-10-13 21:36 ` dual head r128 Benjamin Herrenschmidt
2000-10-13 21:47 ` Michel Lanners
2000-10-14 10:13 ` Benjamin Herrenschmidt [this message]
2000-10-14 10:21 ` Geert Uytterhoeven
[not found] <19340906102959.14429@192.168.1.2>
2000-10-12 17:57 ` Gabriel Paubert
[not found] <200010121619.TAA27476@ns0.imbc.gr>
2000-10-12 17:08 ` Kostas Gewrgiou
2000-10-12 16:25 Hendricks, Kevin
-- strict thread matches above, loose matches on Subject: below --
2000-10-12 14:30 Hendricks, Kevin
2000-10-12 16:11 ` Kostas Gewrgiou
2000-10-12 17:22 ` Michel Dänzer
2000-10-12 17:44 ` Kostas Gewrgiou
2000-10-12 21:25 ` Michel Dänzer
2000-10-13 15:26 ` Kostas Gewrgiou
2000-10-13 16:21 ` Geert Uytterhoeven
2000-10-12 13:41 Hendricks, Kevin
2000-10-12 14:10 ` Kostas Gewrgiou
2000-10-11 18:17 Josh Huber
2000-10-11 18:43 ` Michel Dänzer
2000-10-11 18:52 ` Josh Huber
2000-10-11 19:04 ` Tom Rini
2000-10-11 19:09 ` Michel Dänzer
2000-10-11 19:26 ` Josh Huber
2000-10-11 22:48 ` Michel Dänzer
2000-10-13 17:16 ` Josh Huber
2000-10-12 13:09 ` Kostas Gewrgiou
2000-10-12 15:13 ` Benjamin Herrenschmidt
2000-10-12 15:49 ` Gabriel Paubert
2000-10-12 16:40 ` David Edelsohn
2000-10-17 0:12 ` Paul Mackerras
2000-10-17 5:56 ` Michel Lanners
2000-10-17 10:41 ` Benjamin Herrenschmidt
2000-10-17 13:45 ` Geert Uytterhoeven
2000-10-17 17:17 ` Benjamin Herrenschmidt
2000-10-12 16:44 ` Kostas Gewrgiou
2000-10-11 21:01 ` Gabriel Paubert
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