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From: Brian Johnson <bjj4@charter.net>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] Re: [RFC] 64 bit i/o
Date: Wed, 02 Jan 2008 09:28:49 -0600	[thread overview]
Message-ID: <477BADB1.30400@charter.net> (raw)
In-Reply-To: <477BA5AB.6030406@earthlink.net>

Robert Reif wrote:
> Paul Brook wrote:
>> 
>> Couldn't you just latch the value when one half is accessed?
>> 
> In this one specific case you could do that but this is not the only
> case in sparc32 (TOD, MXCC, ...) and other architectures with 64 bit
> hardware have similar requirements.
> 
> This is a generic solution that fills a hole in the qemu
> implementation.

Agreed.  Some non-PC hardware has 64-bit registers which need to be 
accessed as 64-bit quantities, in order to read or write all fields at 
once.  Qemu should support 64-bit I/O.

Brian

  reply	other threads:[~2008-01-02 15:29 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-02  3:29 [Qemu-devel] [RFC] 64 bit i/o Robert Reif
2008-01-02 14:01 ` Paul Brook
2008-01-02 14:54   ` Robert Reif
2008-01-02 15:28     ` Brian Johnson [this message]
2008-01-02 18:17       ` [Qemu-devel] " Blue Swirl

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