From: Russell King <rmk@arm.linux.org.uk>
To: Geert.Uytterhoeven@sonycom.com (Geert Uytterhoeven)
Cc: linux-kernel@vger.rutgers.edu (Linux kernel),
linuxppc-dev@lists.linuxppc.org (Linux/PPC Development),
linux@cthulhu.engr.sgi.com (Linux/MIPS Development)
Subject: Re: Proposal: non-PC ISA bus support
Date: Tue, 20 Jun 2000 21:10:06 +0100 (BST) [thread overview]
Message-ID: <200006202010.VAA22426@flint.arm.linux.org.uk> (raw)
In-Reply-To: <Pine.GSO.4.10.10006201254290.8592-100000@dandelion.sonytel.be> from "Geert Uytterhoeven" at Jun 20, 2000 01:21:10 PM
Geert Uytterhoeven writes:
> 1. ISA I/O space is memory mapped on many platforms (e.g. PPC and MIPS). To
> access it from user space, you cannot plainly use inb() and friends like on
> PC, but you have to mmap() the correct region of /dev/mem first. This
> region depends on the machine type and currently there's no simple way to
> find out from user space.
We've already solved this on ARM. Check out arch/arm/kernel/isa.c
_____
|_____| ------------------------------------------------- ---+---+-
| | Russell King rmk@arm.linux.org.uk --- ---
| | | | http://www.arm.linux.org.uk/~rmk/aboutme.html / / |
| +-+-+ --- -+-
/ | THE developer of ARM Linux |+| /|\
/ | | | --- |
+-+-+ ------------------------------------------------- /\\\ |
WARNING: multiple messages have this Message-ID (diff)
From: Russell King <rmk@arm.linux.org.uk>
To: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: Linux kernel <linux-kernel@vger.rutgers.edu>,
Linux/PPC Development <linuxppc-dev@lists.linuxppc.org>,
Linux/MIPS Development <linux@cthulhu.engr.sgi.com>
Subject: Re: Proposal: non-PC ISA bus support
Date: Tue, 20 Jun 2000 21:10:06 +0100 (BST) [thread overview]
Message-ID: <200006202010.VAA22426@flint.arm.linux.org.uk> (raw)
Message-ID: <20000620201006.PSTBMuUAcNemsETkr-OkWUJzFQaBaEggPVyfXIHnkZ0@z> (raw)
In-Reply-To: <Pine.GSO.4.10.10006201254290.8592-100000@dandelion.sonytel.be> from "Geert Uytterhoeven" at Jun 20, 2000 01:21:10 PM
Geert Uytterhoeven writes:
> 1. ISA I/O space is memory mapped on many platforms (e.g. PPC and MIPS). To
> access it from user space, you cannot plainly use inb() and friends like on
> PC, but you have to mmap() the correct region of /dev/mem first. This
> region depends on the machine type and currently there's no simple way to
> find out from user space.
We've already solved this on ARM. Check out arch/arm/kernel/isa.c
_____
|_____| ------------------------------------------------- ---+---+-
| | Russell King rmk@arm.linux.org.uk --- ---
| | | | http://www.arm.linux.org.uk/~rmk/aboutme.html / / |
| +-+-+ --- -+-
/ | THE developer of ARM Linux |+| /|\
/ | | | --- |
+-+-+ ------------------------------------------------- /\\\ |
next prev parent reply other threads:[~2000-06-20 20:15 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-06-20 11:21 Proposal: non-PC ISA bus support Geert Uytterhoeven
2000-06-20 12:23 ` Benjamin Herrenschmidt
2000-06-20 12:41 ` Geert Uytterhoeven
2000-06-20 13:02 ` Benjamin Herrenschmidt
2000-06-20 13:09 ` Geert Uytterhoeven
2000-06-20 13:25 ` De Schrijver Peter
2000-06-20 13:30 ` Benjamin Herrenschmidt
2000-06-21 21:47 ` Michel Lanners
2000-06-20 17:11 ` Frank Rowand
2000-06-20 17:29 ` Geert Uytterhoeven
2000-06-20 20:10 ` Russell King [this message]
2000-06-20 20:10 ` Russell King
2000-06-21 23:57 ` Richard Henderson
2000-06-22 6:45 ` Geert Uytterhoeven
2000-06-22 7:19 ` Richard Henderson
2000-06-22 7:41 ` Geert Uytterhoeven
2000-06-22 8:59 ` Richard Henderson
2000-06-22 9:15 ` Geert Uytterhoeven
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