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Date: Fri, 05 Jun 2009 01:29:32 -0600 (MDT)
Message-Id: <20090605.012932.-1325212215.imp@bsdimp.com>
Subject: Re: [Qemu-devel] [PATCH] fix configure for mips o32
From: "M. Warner Losh" <imp@bsdimp.com>
In-Reply-To: <87r5y0tkzg.fsf@lechat.rtp-net.org>
References: <87ws7ttkch.fsf@lechat.rtp-net.org>
	<200906031622.48342.paul@codesourcery.com>
	<87r5y0tkzg.fsf@lechat.rtp-net.org>
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To: arnaud.patard@rtp-net.org
Cc: paul@codesourcery.com, qemu-devel@nongnu.org

In message: <87r5y0tkzg.fsf@lechat.rtp-net.org>
            Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org> writes:
: Paul Brook <paul@codesourcery.com> writes:
: 
: Hi,
: 
: > On Wednesday 03 June 2009, Arnaud Patard wrote:
: >> Paul Brook <paul@codesourcery.com> writes:
: >> > On Wednesday 03 June 2009, Arnaud Patard wrote:
: >> >> The commit 1ad2134f914dfd4c8f92307c94c9a5a1e28f0059 is defining
: >> >> target_phys_bits and set it to 64 for all mips machines including mipsel
: >> >> machines which are 32 bit. This patch set it to 32.
: >> >
: >> > MIPS32 CPUs have a 36-bit physical address space. That's what the old
: >> > code said anyway.
: >>
: >> Is there more information than that in the old code ? I really thought
: >> mips32 4Kc have 32-bit address paths not 36.
: >
: > I suspect you're confusing physical and virtual addresses.
: >
: 
: fwiw, found out where I read that. At
: http://www.mips.com/products/processors/hard-ip-cores/4kc-hard-ip-core/.

None-the-less, mipsel for arc has 36-bit addresses.  The patch is bad.

Warner