aarch32: optee: define the OP-TEE secure payload
AArch32 only platforms can boot the OP-TEE secure firmware as
a BL32 secure payload. Such configuration can be defined through
AARCH32_SP=optee.
The source files can rely on AARCH32_SP_OPTEE to condition
OP-TEE boot specific instruction sequences.
OP-TEE does not expect ARM Trusted Firmware formatted structure
as boot argument. Load sequence is expected to have already loaded
to OP-TEE boot arguments into the bl32 entrypoint info structure.
Last, AArch32 platform can only boot AArch32 OP-TEE images.
Change-Id: Ic28eec5004315fc9111051add6bb1a1d607fc815
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
diff --git a/bl32/optee/optee.mk b/bl32/optee/optee.mk
new file mode 100644
index 0000000..462020f
--- /dev/null
+++ b/bl32/optee/optee.mk
@@ -0,0 +1,15 @@
+#
+# Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# This makefile only aims at complying with ARM Trusted Firmware build process so
+# that "optee" is a valid ARM Trusted Firmware AArch32 Secure Playload identifier.
+
+ifneq ($(ARCH),aarch32)
+$(error This directory targets AArch32 support)
+endif
+
+$(eval $(call add_define,AARCH32_SP_OPTEE))
+
+$(info ARM Trusted Firmware built for OP-TEE payload support)