MIPS: Preserve Config implementation-defined bits

[oweals/u-boot.git] / arch / mips / cpu / start.S

diff --git a/arch/mips/cpu/start.S b/arch/mips/cpu/start.S
index 827a544987852587a1ca7018e2a160c4b71b19ca..6aec430a670ceb3223b92fd5ab70600e70eacbc0 100644 (file)
--- a/arch/mips/cpu/start.S
+++ b/arch/mips/cpu/start.S
@@ -123,8 +123,9 @@ reset:
        mtc0    zero, CP0_COMPARE
 
 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
-       /* CONFIG0 register */
-       li      t0, CONF_CM_UNCACHED
+       mfc0    t0, CP0_CONFIG
+       and     t0, t0, MIPS_CONF_IMPL
+       or      t0, t0, CONF_CM_UNCACHED
        mtc0    t0, CP0_CONFIG
 #endif