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[PATCH] RM9000 icache problem

To: linux-mips@linux-mips.org
Subject: [PATCH] RM9000 icache problem
From: Thomas Koeller <thomas.koeller@baslerweb.com>
Date: Fri, 10 Feb 2006 17:36:27 +0100
Organization: Basler AG
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
User-agent: KMail/1.6.2
The code to work around the RM9000 icache problems is wrong and
ineffective. The patch below fixes that.

Signed-off-by: Thomas Koeller  <thomas.koeller@baslerweb.com>

--- linux.git/arch/mips/kernel/signal-common.h  2005-11-02 13:21:29.000000000 
+0100
+++ linux-2.6.14-5/arch/mips/kernel/signal-common.h     2006-02-10 
12:48:50.000000000 +0100
@@ -176,7 +176,7 @@
        if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags (sp) == 0))
                sp = current->sas_ss_sp + current->sas_ss_size;
 
-       return (void *)((sp - frame_size) & (ICACHE_REFILLS_WORKAROUND_WAR ? 32 
: ALMASK));
+       return (void *)((sp - frame_size) & (ICACHE_REFILLS_WORKAROUND_WAR ? 
~(cpu_icache_line_size()-1) : ALMASK));
 }
 
 static inline int install_sigtramp(unsigned int __user *tramp,



-- 
--------------------------------------------------

Thomas Koeller, Software Development
Basler Vision Technologies

thomas dot koeller at baslerweb dot com
http://www.baslerweb.com

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