Restart interrupts after an exception.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2664 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 14 insertions, 1 deletions

diff --git a/target-mips/op.c b/target-mips/op.c
index 3951204169..9e9f8eb759 100644
--- a/target-mips/op.c
+++ b/target-mips/op.c
@@ -1365,7 +1365,7 @@ void op_mtc0_status (void)
         !(env->hflags & MIPS_HFLAG_DM) &&
         (val & (1 << CP0St_UM)))
         env->hflags |= MIPS_HFLAG_UM;
-    env->CP0_Status = val;
+    env->CP0_Status = (env->CP0_Status & ~0xF878FF17) | val;
     if (loglevel & CPU_LOG_EXEC)
         CALL_FROM_TB2(do_mtc0_status_debug, old, val);
     CALL_FROM_TB1(cpu_mips_update_irq, env);
@@ -2181,6 +2181,19 @@ void op_save_pc (void)
     RETURN();
 }
 
+void op_interrupt_restart (void)
+{
+    if (!(env->CP0_Status & (1 << CP0St_EXL)) &&
+        !(env->CP0_Status & (1 << CP0St_ERL)) &&
+        !(env->hflags & MIPS_HFLAG_DM) &&
+        (env->CP0_Status & (1 << CP0St_IE)) &&
+        (env->CP0_Status & env->CP0_Cause & CP0Ca_IP_mask)) {
+        env->CP0_Cause &= ~(0x1f << CP0Ca_EC);
+        CALL_FROM_TB1(do_raise_exception, EXCP_EXT_INTERRUPT);
+    }
+    RETURN();
+}
+
 void op_raise_exception (void)
 {
     CALL_FROM_TB1(do_raise_exception, PARAM1);