From: Dan Malek <dan@mvista.com>
To: Okehee Goh <ogoh@asu.edu>
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: MMU in MBX860
Date: Thu, 25 Oct 2001 00:01:12 -0400 [thread overview]
Message-ID: <3BD78E88.90337302@mvista.com> (raw)
In-Reply-To: CPEELCODKANPCLBCAGOFKEBKCAAA.ogoh@asu.edu
Okehee Goh wrote:
> My question:
> In MPC860, is there any way for supervisor mode's kernel to access all
> memory space
That's the purpose of the SHARED indicator in the TLB. It effectively
disables ASID checking and if you mark pages SHARED but not user access
the kernel can access all pages while the applications are still protected.
-- Dan
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2001-10-25 4:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-24 22:46 MMU in MBX860 Okehee Goh
2001-10-25 4:01 ` Dan Malek [this message]
2001-10-25 4:51 ` Okehee Goh
2001-10-25 15:19 ` Dan Malek
2001-10-25 15:45 ` 405GP Dhrystone Benchmark ibm405.linux
2001-10-25 16:26 ` Mark Hatle
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