[lsu] Don't allow MMIO loads to proceed while they have a dependent s…

…tore.
riscv-boom · Jul 22, 2019 · d0c5520 · d0c5520
1 parent 11c3366
commit d0c5520
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/main/scala/lsu/lsu.scala b/src/main/scala/lsu/lsu.scala
@@ -520,7 +520,9 @@ class LoadStoreUnit(pl_width: Int)(implicit p: Parameters,
          laq_allocated      (exe_ld_idx_wakeup) &&
          !laq_executed      (exe_ld_idx_wakeup) &&
          !laq_failure       (exe_ld_idx_wakeup) &&
-         (!laq_is_uncacheable(exe_ld_idx_wakeup) || (io.commit_load_at_rob_head && laq_head === exe_ld_idx_wakeup))
+         (!laq_is_uncacheable(exe_ld_idx_wakeup) || (io.commit_load_at_rob_head &&
+                                                     laq_head === exe_ld_idx_wakeup &&
+                                                     laq_st_dep_mask(exe_ld_idx_wakeup).asUInt === 0.U))
          )
    {
       can_fire_load_wakeup := true.B