Pseudo-halt timing fix

core/vb.c

@@ -322,6 +322,7 @@ struct VB {
         /* CPU snapshot */
         uint32_t adtre;
         uint32_t chcw;
+        uint32_t ecr;
         uint32_t eipc;
         uint32_t eipsw;
         uint32_t fepc;
@@ -381,12 +382,21 @@ static int32_t SignExtend(int32_t value, int32_t bits) {
 
 /* Process a simulation for a given number of clocks */
 static int sysEmulate(VB *sim, uint32_t clocks) {
-    int ret;
-    ret  = cpuEmulate(sim, clocks);
-           padEmulate(sim, clocks);
-           tmrEmulate(sim, clocks);
-           vsuEmulate(sim, clocks);
-    ret |= vipEmulate(sim, clocks);
+    int ret = 0;
+
+    /* CPU is in a pseudo-halt state that requires an interrupt to exit */
+    int never =
+        sim->cpu.operation == CPU_PHALT &&
+        sim->ph.operation  == PH_NEVER
+    ;
+
+    /* Process all components */
+    if (!never) ret  = cpuEmulate(sim, clocks);
+                       padEmulate(sim, clocks);
+                       tmrEmulate(sim, clocks);
+                       vsuEmulate(sim, clocks);
+                ret |= vipEmulate(sim, clocks);
+    if ( never) ret |= cpuEmulate(sim, clocks);
     return ret;
 }