From 391c569daa6e4e999592966e29c146dfc4de9a9c Mon Sep 17 00:00:00 2001
From: Arnaud Patard <arnaud.patard@rtp-net.org>
Date: Thu, 13 Mar 2008 09:53:21 +0100
Subject: [ARM] 4864/1: Enable write buffer coalescing on IOP

Some bootloaders are disabling write buffer coalescing. Enable it back
under linux.

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 arch/arm/mm/proc-xscale.S | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'arch/arm')

diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S
index c156ddab9a2..016690b9d56 100644
--- a/arch/arm/mm/proc-xscale.S
+++ b/arch/arm/mm/proc-xscale.S
@@ -114,6 +114,10 @@ clean_addr:	.word	CLEAN_ADDR
  * Nothing too exciting at the moment
  */
 ENTRY(cpu_xscale_proc_init)
+	@ enable write buffer coalescing. Some bootloader disable it
+	mrc	p15, 0, r1, c1, c0, 1
+	bic	r1, r1, #1
+	mcr	p15, 0, r1, c1, c0, 1
 	mov	pc, lr
 
 /*
-- 
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