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From: Tomas Kalibera <kalibera@domain.hid>
To: xenomai@xenomai.org
Subject: [Xenomai-help] Direct access to I/O ports and physical memory from user-space
Date: Tue, 25 Mar 2008 22:25:10 -0400	[thread overview]
Message-ID: <47E9B406.8030407@domain.hid> (raw)

Hello,

is it possible to access I/O port on x86 solely from Xenomai user-space 
primary domain ? I assume that iopl() and then outb(), inb() should 
work. But, how to avoid switches to secondary domain ?

Similarly, for physical memory, there is an example in Xenomai 
distribution that mmaps /dev/mem. Is there a way to avoid switches here ?

Thanks,
Tomas



             reply	other threads:[~2008-03-26  2:25 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-26  2:25 Tomas Kalibera [this message]
2008-03-26 10:36 ` [Xenomai-help] Direct access to I/O ports and physical memory from user-space M. Koehrer

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