From: Marcelo Tosatti <marcelo@kvack.org>
To: Paul Mackerras <paulus@samba.org>
Cc: David Jander <david.jander@protonic.nl>,
linux-ppc-embedded <linuxppc-embedded@ozlabs.org>
Subject: [PATCH] ppc32 8xx: Fix r3 thrashing due to 8MB TLB page instantiation (!CONFIG_8xx_CPU6)
Date: Fri, 5 May 2006 17:22:11 -0300 [thread overview]
Message-ID: <20060505202211.GA18136@dmt> (raw)
(please ignore last patch, its incomplete)
Instantiation of 8MB pages on the TLB cache for the kernel static
mapping thrashes r3 register on !CONFIG_8xx_CPU6 configurations.
Signed-off-by: Marcelo Tosatti <marcelo@kvack.org>
diff --git a/arch/ppc/kernel/head_8xx.S b/arch/ppc/kernel/head_8xx.S
index ec53c7d..09b3adc 100644
--- a/arch/ppc/kernel/head_8xx.S
+++ b/arch/ppc/kernel/head_8xx.S
@@ -355,9 +355,7 @@ #endif
. = 0x1200
DataStoreTLBMiss:
-#ifdef CONFIG_8xx_CPU6
stw r3, 8(r0)
-#endif
DO_8xx_CPU6(0x3f80, r3)
mtspr SPRN_M_TW, r10 /* Save a couple of working registers */
mfcr r10
@@ -417,9 +415,7 @@ #endif
lwz r11, 0(r0)
mtcr r11
lwz r11, 4(r0)
-#ifdef CONFIG_8xx_CPU6
lwz r3, 8(r0)
-#endif
rfi
/* This is an instruction TLB error on the MPC8xx. This could be due
@@ -500,9 +496,7 @@ LoadLargeDTLB:
lwz r11, 4(r0)
lwz r12, 16(r0)
-#ifdef CONFIG_8xx_CPU6
lwz r3, 8(r0)
-#endif
rfi
/* This is the data TLB error on the MPC8xx. This could be due to
next reply other threads:[~2006-05-05 20:22 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-05 20:22 Marcelo Tosatti [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-05-05 20:09 [PATCH] ppc32 8xx: Fix r3 thrashing due to 8MB TLB page instantiation (!CONFIG_8xx_CPU6) Marcelo Tosatti
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20060505202211.GA18136@dmt \
--to=marcelo@kvack.org \
--cc=david.jander@protonic.nl \
--cc=linuxppc-embedded@ozlabs.org \
--cc=paulus@samba.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).