From: Aneesh Bansal <aneesh.bansal@freescale.com>
Date: Tue, 11 Mar 2014 17:51:45 +0000 (+0530)
Subject: powerpc/mpc8xxx: SECURE BOOT- Disable law 0 for non PBL platforms
X-Git-Tag: v2014.07-rc1~15^2~58
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=7efb4b51975409fb922e9f9bfec21a7affb6f83f;p=u-boot

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 a401083107..55ee12573f 100644
--- 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.