build(bl32): added check for AARCH32_SP

If AACRH32_SP is not specified, it causes the DEFAULT_LINKER_SCRIPT
variable to be empty, and then the linker takes the variable following
it as if it was the linker script, which is not one. This patch
addresses that issue by requiring the AARCH32_SP variable to be set
before continuing.

Change-Id: I21db7d5bd86b98faaa1a1cd3f985daa592556a2d
Signed-off-by: Juan Pablo Conde <juanpablo.conde@arm.com>
diff --git a/plat/arm/board/a5ds/platform.mk b/plat/arm/board/a5ds/platform.mk
index 6fcf080..3ed7a63 100644
--- a/plat/arm/board/a5ds/platform.mk
+++ b/plat/arm/board/a5ds/platform.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2019-2021, Arm Limited. All rights reserved.
+# Copyright (c) 2019-2023, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -98,6 +98,10 @@
 
 NEED_BL32 := yes
 
+ifeq (${AARCH32_SP},none)
+    $(error Variable AARCH32_SP has to be set for AArch32)
+endif
+
 MULTI_CONSOLE_API		:=	1
 
 ARM_DISABLE_TRUSTED_WDOG	:=	1
diff --git a/plat/arm/board/corstone700/platform.mk b/plat/arm/board/corstone700/platform.mk
index 75833f6..d6d3bef 100644
--- a/plat/arm/board/corstone700/platform.mk
+++ b/plat/arm/board/corstone700/platform.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2019-2022, Arm Limited and Contributors. All rights reserved.
+# Copyright (c) 2019-2023, Arm Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -25,6 +25,10 @@
 
 NEED_BL32		:=	yes
 
+ifeq (${AARCH32_SP},none)
+    $(error Variable AARCH32_SP has to be set for AArch32)
+endif
+
 # Include GICv2 driver files
 include drivers/arm/gic/v2/gicv2.mk
 
diff --git a/plat/arm/board/fvp/platform.mk b/plat/arm/board/fvp/platform.mk
index 6ac4e09..9104838 100644
--- a/plat/arm/board/fvp/platform.mk
+++ b/plat/arm/board/fvp/platform.mk
@@ -407,10 +407,6 @@
 PLAT_BL_COMMON_SOURCES	+=	plat/arm/board/fvp/fvp_stack_protector.c
 endif
 
-ifeq (${ARCH},aarch32)
-    NEED_BL32 := yes
-endif
-
 # Enable the dynamic translation tables library.
 ifeq ($(filter 1,${RESET_TO_BL2} ${ARM_XLAT_TABLES_LIB_V1}),)
     ifeq (${ARCH},aarch32)
diff --git a/plat/arm/board/fvp_ve/platform.mk b/plat/arm/board/fvp_ve/platform.mk
index f7eace8..79cf356 100644
--- a/plat/arm/board/fvp_ve/platform.mk
+++ b/plat/arm/board/fvp_ve/platform.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2019-2021, Arm Limited. All rights reserved.
+# Copyright (c) 2019-2023, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -96,6 +96,10 @@
 
 NEED_BL32 := yes
 
+ifeq (${AARCH32_SP},none)
+    $(error Variable AARCH32_SP has to be set for AArch32)
+endif
+
 # Modification of arm_common.mk
 
 # Process ARM_DISABLE_TRUSTED_WDOG flag
diff --git a/plat/arm/common/arm_common.mk b/plat/arm/common/arm_common.mk
index 4914553..41d1b66 100644
--- a/plat/arm/common/arm_common.mk
+++ b/plat/arm/common/arm_common.mk
@@ -6,6 +6,12 @@
 
 include common/fdt_wrappers.mk
 
+ifeq (${ARCH},aarch32)
+    ifeq (${AARCH32_SP},none)
+        $(error Variable AARCH32_SP has to be set for AArch32)
+    endif
+endif
+
 ifeq (${ARCH}, aarch64)
   # On ARM standard platorms, the TSP can execute from Trusted SRAM, Trusted
   # DRAM (if available) or the TZC secured area of DRAM.