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From: Eugene Surovegin <ebs@innocent.com>
To: Hollis Blanchard <hollis@austin.ibm.com>
Cc: Vishwanath <vishwanath@mistralsoftware.com>,
	linuxppc-embedded@lists.linuxppc.org
Subject: Re: IBM 440GP 36-bit addressing
Date: Mon, 26 Aug 2002 10:13:11 -0700	[thread overview]
Message-ID: <5.1.0.14.2.20020826100602.02cea478@pop.prodigy.net> (raw)
In-Reply-To: <1030376908.1348.73.camel@granite.austin.ibm.com>


Hollis,

At 08:48 AM 8/26/2002, you wrote:

>The usual(32-bit) way is to mmap(/dev/mem). I don't know if that will work
>with
>36-bit addresses.

It will work only for first 4G of physical address space.
/dev/mem cannot be used to access EPB/OCP or PCI address space on 440.

For this purpose "/dev/mem-like" device can be easily written that takes
into account 36-bit phys addresses.

Thanks,

  Eugene Surovegin <mailto:ebs@innocent.com>


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

      reply	other threads:[~2002-08-26 17:13 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-08-23 15:00 IBM 440GP 36-bit addressing Vishwanath
2002-08-23 15:00 ` Hollis Blanchard
2002-08-24  7:05   ` Vishwanath
2002-08-26 15:48     ` Hollis Blanchard
2002-08-26 17:13       ` Eugene Surovegin [this message]

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