MIPS: Map CM Global Control Registers

Map the Global Control Registers (GCRs) provided by the MIPS Coherence
Manager (CM) in preparation for using some of them in later patches.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
diff --git a/arch/mips/cpu/start.S b/arch/mips/cpu/start.S
index 6f1d219..c157d03 100644
--- a/arch/mips/cpu/start.S
+++ b/arch/mips/cpu/start.S
@@ -141,6 +141,12 @@
 1:
 	PTR_L	gp, 0(ra)
 
+#ifdef CONFIG_MIPS_CM
+	PTR_LA	t9, mips_cm_map
+	jalr	t9
+	 nop
+#endif
+
 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
 # ifdef CONFIG_SYS_MIPS_CACHE_INIT_RAM_LOAD
 	/* Initialize any external memory */