86xx: Move the clear_tlbs before MMU turn on

We must invalidate TLBs before MMU turn on, but
currently the code is not, if there are some stale
TLB entry valid in the TLBs, it will cause strange
issue.

Signed-off-by: Dave Liu <daveliu@freescale.com>
Acked-by: Becky Bruce <becky.bruce@freescale.com>

diff --git a/cpu/mpc86xx/start.S b/cpu/mpc86xx/start.S
index 159f3e174385b98e86acbe91cc852ce434d58c4f..30e60477c5337b9cb4c178fbe708bac2fc2700bb 100644 (file)
--- a/cpu/mpc86xx/start.S
+++ b/cpu/mpc86xx/start.S
@@ -202,8 +202,12 @@ boot_warm:
        mtmsr   0
 #endif
 
+       /* Invalidate BATs */
        bl      invalidate_bats
        sync
+       /* Invalidate all of TLB before MMU turn on */
+       bl      clear_tlbs
+       sync
 
 #ifdef CONFIG_SYS_L2
        /* init the L2 cache */
@@ -275,7 +279,6 @@ in_flash:
 
        /* setup the rest of the bats */
        bl      setup_bats
-       bl      clear_tlbs
        sync
 
 #if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR)