target-mips: add support for CP0_Config4

Add CP0_Config4, define rw_bitmask.

Signed-off-by: Petar Jovanovic <petar.jovanovic@imgtec.com>
Reviewed-by: Eric Johnson <eric.johnson@imgtec.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/target-mips/op_helper.c b/target-mips/op_helper.c
index 8e3a6d7da6..ed8dde8ccc 100644
--- a/target-mips/op_helper.c
+++ b/target-mips/op_helper.c
@@ -1489,6 +1489,12 @@ void helper_mtc0_config2(CPUMIPSState *env, target_ulong arg1)
     env->CP0_Config2 = (env->CP0_Config2 & 0x8FFF0FFF);
 }
 
+void helper_mtc0_config4(CPUMIPSState *env, target_ulong arg1)
+{
+    env->CP0_Config4 = (env->CP0_Config4 & (~env->CP0_Config4_rw_bitmask)) |
+                       (arg1 & env->CP0_Config4_rw_bitmask);
+}
+
 void helper_mtc0_lladdr(CPUMIPSState *env, target_ulong arg1)
 {
     target_long mask = env->CP0_LLAddr_rw_bitmask;