From: Benjamin Herrenschmidt <bh40@calva.net>
To: Geert Uytterhoeven <geert@linux-m68k.org>,
linuxppc-dev@lists.linuxppc.org
Cc: linux-fbdev@vuser.vu.union.edu
Subject: Re: [linux-fbdev] Retrace
Date: Mon, 7 Feb 2000 20:02:03 +0100 [thread overview]
Message-ID: <20000207200203.007111@mailhost.mipsys.com> (raw)
In-Reply-To: <Pine.LNX.4.10.10002071812050.1142-100000@cassiopeia.home>
On Mon, Feb 7, 2000, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
>And now the bad news: the address you have to mmap() depends on the machine
>type :-(
We need to find a solution for that one day or another. The iobase is not
only arch-dependant (PReP, PowerMac, CHRP...) but also machine dependant,
since it depends on the host bridge type.
Unfortunately, with weird host bridges like Apple Uni-N (that has 3
busses with 3 different io bases but the same bus number), it's almost
impossible to get it correct, or eventually by parsing /proc/device-tree.
That means that getting code that need to do io's from userland is a real
challenge. Even X is not completely correct in this regard. Ryuichi tried
to fix it at least for PowerMacs, but gave up for Uni-N based machines.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next parent reply other threads:[~2000-02-07 19:02 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.10.10002071812050.1142-100000@cassiopeia.home>
2000-02-07 19:02 ` Benjamin Herrenschmidt [this message]
2000-02-08 9:29 ` [linux-fbdev] Retrace Gabriel Paubert
2000-02-08 14:56 ` Benjamin Herrenschmidt
2000-02-08 16:47 ` Gabriel Paubert
2000-02-08 16:51 ` Geert Uytterhoeven
2000-02-08 17:09 ` Gabriel Paubert
2000-02-08 21:30 ` Benjamin Herrenschmidt
2000-02-08 21:39 ` Geert Uytterhoeven
2000-02-08 10:02 Geert Uytterhoeven
2000-02-09 2:45 ` Paul Mackerras
-- strict thread matches above, loose matches on Subject: below --
2000-02-08 16:00 Andy
2000-02-08 21:29 Benjamin Herrenschmidt
2000-02-09 9:57 ` Gabriel Paubert
2000-02-09 13:45 Patrick Lerda
2000-02-09 14:09 ` Gabriel Paubert
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20000207200203.007111@mailhost.mipsys.com \
--to=bh40@calva.net \
--cc=geert@linux-m68k.org \
--cc=linux-fbdev@vuser.vu.union.edu \
--cc=linuxppc-dev@lists.linuxppc.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.