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 e2f78b34ff93550c6016dd17ceac66eb9eeaad81..6b96fedf0407d675428e7ca742dadc5500a95090 100644 (file)
--- 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);