From: "Jon Burgess" <Jon_Burgess@eur.3com.com>
To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>,
"Gleb O. Raiko" <raiko@niisi.msk.ru>
Cc: linux-mips@oss.sgi.com
Subject: Re: mips32_flush_cache routine corrupts CP0_STATUS with gcc-2.96
Date: Mon, 15 Jul 2002 10:42:31 +0100 [thread overview]
Message-ID: <80256BF7.0035BD49.00@notesmta.eur.3com.com> (raw)
On Fri, 12 Jul 2002, Gleb O. Raiko wrote:
> instruction. CPU knows the stalled instruction is in I-cache, but,
> unfortunately, caches have been swapped already. The same cacheline in
> the D-cache was valid bit set. CPU get data instead of code.
I'm glad this cache swapping mess is not necessary for mips32 chips. I imagine
that when the caches are swapped the instruction fetch will examine the D-cache
so it will not 'know' the instruction is in the I-cache. If the address is
present in both caches then the content should be the same. If the cache
routines have some self-modifying code then this really is asking for trouble.
Jon
next reply other threads:[~2002-07-15 9:38 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-15 9:42 Jon Burgess [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-07-22 8:18 mips32_flush_cache routine corrupts CP0_STATUS with gcc-2.96 Sedjai, Mohamed
2002-07-22 8:18 ` Sedjai, Mohamed
2002-07-12 15:24 Jon Burgess
2002-07-12 9:08 Sedjai, Mohamed
2002-07-12 9:08 ` Sedjai, Mohamed
2002-07-12 9:26 ` Geert Uytterhoeven
2002-07-12 9:40 ` Carsten Langgaard
2002-07-11 16:33 Jon Burgess
2002-07-11 12:11 Jon Burgess
2002-07-11 16:53 ` Jun Sun
2002-07-11 9:49 Jon Burgess
2002-07-11 12:13 ` Ralf Baechle
2002-07-12 9:18 ` Carsten Langgaard
2002-07-10 14:16 Jon Burgess
2002-07-11 0:15 ` Ralf Baechle
2002-07-11 8:48 ` Gleb O. Raiko
2002-07-11 9:18 ` Carsten Langgaard
2002-07-11 10:06 ` Gleb O. Raiko
2002-07-11 10:15 ` Carsten Langgaard
2002-07-11 10:36 ` Gleb O. Raiko
2002-07-11 10:46 ` Carsten Langgaard
2002-07-11 11:12 ` Ralf Baechle
2002-07-11 17:01 ` Maciej W. Rozycki
2002-07-11 23:02 ` Dominic Sweetman
2002-07-12 0:24 ` Ralf Baechle
2002-07-12 10:37 ` Gleb O. Raiko
2002-07-12 18:40 ` Maciej W. Rozycki
2002-07-11 11:23 ` Maciej W. Rozycki
2002-07-11 13:11 ` Gleb O. Raiko
2002-07-11 13:41 ` Maciej W. Rozycki
2002-07-11 15:27 ` Gleb O. Raiko
2002-07-11 15:59 ` Maciej W. Rozycki
2002-07-12 10:26 ` Gleb O. Raiko
2002-07-12 19:02 ` Maciej W. Rozycki
2002-07-15 9:16 ` Gleb O. Raiko
2002-07-16 9:00 ` Maciej W. Rozycki
2002-07-16 10:20 ` Gleb O. Raiko
2002-07-16 10:36 ` Maciej W. Rozycki
2002-07-11 7:34 ` Carsten Langgaard
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