From: Misbah khan <misbah_khan@engineer.com>
To: linuxppc-dev@ozlabs.org
Subject: Re: Where are inb/outb macros?
Date: Sun, 7 Oct 2007 23:05:13 -0700 (PDT) [thread overview]
Message-ID: <13091078.post@talk.nabble.com> (raw)
In-Reply-To: <200710070146.51140.arnd@arndb.de>
inb/outb could be used from the usr space on x86 class PC-computer to access
to io ports this is what i assume that you are trying
You need to compile the program with -O option (expantion of Inline function
)
To perform io operation on ports ioprem/iopl system call must be used (To
get permissio to perform io operation)
Program must run as root
on non 86 platform try using /dev/port device file in the application
misbah
Arnd Bergmann wrote:
>
> 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 <><
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev
>
>
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next prev parent reply other threads:[~2007-10-08 6:05 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
2007-10-08 6:05 ` Misbah khan [this message]
2007-10-08 8:11 ` Benjamin Herrenschmidt
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