From: Arnd Bergmann <arnd@arndb.de>
To: linuxppc-dev@ozlabs.org, benh@kernel.crashing.org
Subject: Re: Where are inb/outb macros?
Date: Sun, 7 Oct 2007 01:46:50 +0200 [thread overview]
Message-ID: <200710070146.51140.arnd@arndb.de> (raw)
In-Reply-To: <1191704881.6414.3.camel@pasglop>
On Saturday 06 October 2007, Benjamin Herrenschmidt wrote:
> On Sun, 2007-10-07 at 00:47 +0400, Peter Lemenkov wrote:
> > Hello All!
> > I can't compile one small software title because of lack <sys/io.h>
> > and inb/outb macros. What sould I do to overcome this obstacle?
> >
> > My linux distro is Fedora 7 if it is matter.
>
> They don't exist in user space on non-x86. You have to do things
> differently. What is your software trying to do ? If it's trying to
> access a PCI device IO space, you probably want to mmap it in sysfs and
> write your own accessors with appropriate memory barriers.
All cases where I've seen application software use <sys/io.h>, there was
actually a full device driver in the kernel that already exported a
high-level interface to user space. If that's the case here, the application
should use that instead of sysfs.
Arnd <><
next prev parent reply other threads:[~2007-10-06 23:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-06 20:47 Where are inb/outb macros? Peter Lemenkov
2007-10-06 21:08 ` Benjamin Herrenschmidt
2007-10-06 23:46 ` Arnd Bergmann [this message]
2007-10-08 6:05 ` Misbah khan
2007-10-08 8:11 ` Benjamin Herrenschmidt
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