[MIPS] cpu/mips/cache.S: Add dcache_enable

Recent bootelf command fixes (017e9b7925f74878d0e9475388cca9bda5ef9482,
"allow ports to override bootelf behavior") requires ports to have this
function.

Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

diff --git a/cpu/mips/cache.S b/cpu/mips/cache.S
index f5939683208f03ccf985b0f0025a4cd70efd02c1..428d251bf126022d56bf22477662cfdc67321094 100644 (file)
--- a/cpu/mips/cache.S
+++ b/cpu/mips/cache.S
@@ -285,6 +285,22 @@ LEAF(dcache_disable)
        jr      ra
        END(dcache_disable)
 
+/*******************************************************************************
+*
+* dcache_enable - enable cache
+*
+* RETURNS: N/A
+*
+*/
+LEAF(dcache_enable)
+       mfc0    t0, CP0_CONFIG
+       ori     t0, CONF_CM_CMASK
+       xori    t0, CONF_CM_CMASK
+       ori     t0, CONF_CM_CACHABLE_NONCOHERENT
+       mtc0    t0, CP0_CONFIG
+       jr      ra
+       END(dcache_enable)
+
 #ifdef CFG_INIT_RAM_LOCK_MIPS
 /*******************************************************************************
 *