Merge pull request #198 from sifive/revert-always-clear

Revert "Always clear feature disable register"
sifive · Oct 23, 2019 · 2d0d3c1 · 2d0d3c1
2 parents 7fea3d1 + 73a6733
commit 2d0d3c1
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/entry.S b/src/entry.S
@@ -28,8 +28,11 @@ _enter:
      * the boot process. */
     la t0, early_trap_vector
     csrw mtvec, t0
-    /* Always clear the feature disable register for all cores series*/
+    /* enable chicken bit if core is bullet series*/
+    la t0, __metal_chicken_bit
+    beqz t0, 1f
     csrwi 0x7C1, 0
+1:
 
     /* There may be pre-initialization routines inside the MBI code that run in
      * C, so here we set up a C environment.  First we set up a stack pointer,