diff --git a/libboard_zynq/src/mpcore.rs b/libboard_zynq/src/mpcore.rs
index 10d3eac..e7f39bb 100644
--- a/libboard_zynq/src/mpcore.rs
+++ b/libboard_zynq/src/mpcore.rs
@@ -154,7 +154,7 @@ register_bit!(scu_control, enable, 0);
 
 impl ScuControl {
     pub fn start(&mut self) {
-        self.modify(|_, w| w.enable(true));
+        self.modify(|_, w| w.enable(true).scu_speculative_linefill_enable(true));
     }
 }
 
diff --git a/libcortex_a9/src/mmu.rs b/libcortex_a9/src/mmu.rs
index 8780066..4c72e48 100644
--- a/libcortex_a9/src/mmu.rs
+++ b/libcortex_a9/src/mmu.rs
@@ -158,7 +158,7 @@ impl L1Table {
                 global: true,
                 shareable: true,
                 access: AccessPermissions::FullAccess,
-                tex: 0b101,
+                tex: 0b0,
                 domain: 0b1111,
                 exec: true,
                 cacheable: true,
@@ -213,7 +213,7 @@ impl L1Table {
                 access: AccessPermissions::FullAccess,
                 tex: 0,
                 domain: 0,
-                exec: true,
+                exec: false,
                 cacheable: false,
                 bufferable: true,
             });