From: Paul Burton <paul.burton@imgtec.com>
Date: Mon, 14 Apr 2014 14:58:45 +0000 (+0100)
Subject: MIPS: smp-cps: set a coherent default CCA
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=33b6866568acce808361fcf25c107c2c94f8eadb;p=deliverable%2Flinux.git

MIPS: smp-cps: set a coherent default CCA

This patch sets a default CCA suited for use with multi-core SMP on all
current MIPS CPS based systems. It may still be overriden by the cca=
argument on the kernel command line.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
---

diff --git a/arch/mips/kernel/smp-cps.c b/arch/mips/kernel/smp-cps.c
index e2f78b34ff93..6b96fedf0407 100644
--- a/arch/mips/kernel/smp-cps.c
+++ b/arch/mips/kernel/smp-cps.c
@@ -76,6 +76,9 @@ static void __init cps_smp_setup(void)
 		__cpu_logical_map[v] = v;
 	}
 
+	/* Set a coherent default CCA (CWB) */
+	change_c0_config(CONF_CM_CMASK, 0x5);
+
 	/* Core 0 is powered up (we're running on it) */
 	bitmap_set(core_power, 0, 1);