powerpc/mpc8xxx: SECURE BOOT- Disable law 0 for non PBL platforms

ISBC creates a LAW 0 entry for non PBL platforms, which is not
disabled before transferring the control to uboot.
The LAW 0 entry has to be disabled.

Signed-off-by: Aneesh Bansal <aneesh.bansal@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

diff --git a/arch/powerpc/cpu/mpc8xxx/law.c b/arch/powerpc/cpu/mpc8xxx/law.c
index a401083107794cc3dd218cf88e7edc58c7858063..55ee12573f711bd94cec7aa71ae7a27a23aaef43 100644 (file)
--- a/arch/powerpc/cpu/mpc8xxx/law.c
+++ b/arch/powerpc/cpu/mpc8xxx/law.c
@@ -233,6 +233,16 @@ void init_laws(void)
 #error FSL_HW_NUM_LAWS can not be greater than 32 w/o code changes
 #endif
 
+#if defined(CONFIG_SECURE_BOOT) && defined(CONFIG_E500) && \
+                                               !defined(CONFIG_E500MC)
+       /* ISBC (Boot ROM) creates a LAW 0 entry for non PBL platforms,
+        * which is not disabled before transferring the control to uboot.
+        * Disable the LAW 0 entry here.
+        */
+       disable_law(0);
+#endif
+
+
        /*
         * Any LAWs that were set up before we booted assume they are meant to
         * be around and mark them used.