From: Jun Sun <jsun@mvista.com>
To: Keith M Wesolowski <wesolows@foobazco.org>
Cc: linux-mips@oss.sgi.com
Subject: Re: RFC: Cleanup/detection patch
Date: Thu, 05 Apr 2001 14:53:14 -0700 [thread overview]
Message-ID: <3ACCE94A.A551470D@mvista.com> (raw)
In-Reply-To: 20010405140338.A1508@foobazco.org
Keith M Wesolowski wrote:
>
> On Thu, Apr 05, 2001 at 01:29:13PM -0700, Jun Sun wrote:
>
> > I don't like bc_ops idea. Usually the external cache capability is still
> > integral part of the CPU.
>
> How can it be both an integral part of the CPU and board-specific?
Hmm, I am thinking about something like Rm7k, where the tertiary cache is
controlled by the CPU (through cache instruction and TagLo/TagHi regsiters,
etc) but the size is only known to the board.
I think some CPUs can have secondary, external cache but cannot figure the
size and, especially, the layout (# of ways, ...) automatically. (Any
confirmation?)
Those are what I was referring to.
The key point is that machine_detection() should happen BEFORE
cpu_probe()/cache_probe() so that we have an elegant way to address the above
situation.
Jun
next prev parent reply other threads:[~2001-04-05 21:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-02 6:52 RFC: Cleanup/detection patch Keith M Wesolowski
2001-04-04 2:43 ` Jun Sun
2001-04-04 3:30 ` Keith M Wesolowski
2001-04-04 17:54 ` Jun Sun
2001-04-05 7:46 ` Keith M Wesolowski
2001-04-05 20:29 ` Jun Sun
2001-04-05 21:03 ` Keith M Wesolowski
2001-04-05 21:53 ` Jun Sun [this message]
2001-04-09 6:40 ` Geert Uytterhoeven
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