From: Michel Lanners <mlan@cpu.lu>
To: bh40@calva.net
Cc: geert@linux-m68k.org, linuxppc-dev@lists.linuxppc.org
Subject: Re: dual head r128
Date: Fri, 13 Oct 2000 23:47:47 +0200 (CEST) [thread overview]
Message-ID: <200010132147.XAA00867@piglet.grunz.lu> (raw)
In-Reply-To: <19340907150812.9049@192.168.1.10>
> Ok, If I follow you correctly, that mean that if we have, for example,
> bus 1 set to 0x10000-0x1ffff, ioportremap() would return, for an address
> in this range, the address + bus_io_base - 0x10000. At least on Macs,
> AFAIK, we have only 64k or 128k of IOs available.
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.
Cheers
Michel
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** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2000-10-13 21:47 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 [this message]
2000-10-14 10:13 ` Benjamin Herrenschmidt
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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