Set processor endianness immediately after RESET
SCTLR_EL3.EE is being configured too late in bl1_arch_setup() and
bl31_arch_setup() after data accesses have already occured on
the cold and warm boot paths.
This control bit must be configured immediately on CPU reset to
match the endian state of the firmware (little endian).
Fixes ARM-software/tf-issues#145
Change-Id: Ie12e46fbbed6baf024c30beb50751591bb8c8655
diff --git a/bl1/aarch64/bl1_entrypoint.S b/bl1/aarch64/bl1_entrypoint.S
index 012b779..62e1218 100644
--- a/bl1/aarch64/bl1_entrypoint.S
+++ b/bl1/aarch64/bl1_entrypoint.S
@@ -43,6 +43,16 @@
func bl1_entrypoint
/* ---------------------------------------------
+ * Set the CPU endianness before doing anything
+ * that might involve memory reads or writes
+ * ---------------------------------------------
+ */
+ mrs x0, sctlr_el3
+ bic x0, x0, #SCTLR_EE_BIT
+ msr sctlr_el3, x0
+ isb
+
+ /* ---------------------------------------------
* Perform any processor specific actions upon
* reset e.g. cache, tlb invalidations etc.
* ---------------------------------------------