Revert "plat/arm: Add support for SEPARATE_NOBITS_REGION"

This reverts commit d433bbdd.

Change-Id: I46c69dce704a1ce1b50452dd4d62425c4a67f7f0

include/plat/arm/common/arm_def.h

 /*
- * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -395,21 +395,13 @@
 /*******************************************************************************
  * BL31 specific defines.
  ******************************************************************************/
-#if ARM_BL31_IN_DRAM || SEPARATE_NOBITS_REGION
+#if ARM_BL31_IN_DRAM
 /*
  * Put BL31 at the bottom of TZC secured DRAM
  */
 #define BL31_BASE			ARM_AP_TZC_DRAM1_BASE
 #define BL31_LIMIT			(ARM_AP_TZC_DRAM1_BASE +	\
 						PLAT_ARM_MAX_BL31_SIZE)
-/*
- * For SEPARATE_NOBITS_REGION, BL31 PROGBITS are loaded in TZC secured DRAM.
- * And BL31 NOBITS are loaded in Trusted SRAM such that BL2 is overwritten.
- */
-#if SEPARATE_NOBITS_REGION
-#define BL31_NOBITS_BASE		BL2_BASE
-#define BL31_NOBITS_LIMIT		BL2_LIMIT
-#endif /* SEPARATE_NOBITS_REGION */
 #elif (RESET_TO_BL31)
 /* Ensure Position Independent support (PIE) is enabled for this config.*/
 # if !ENABLE_PIE

plat/arm/common/arm_bl31_setup.c

 /*
- * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -56,14 +56,6 @@ IMPORT_SYM(unsigned long, __INIT_CODE_END__, BL_INIT_CODE_END);
 					MT_CODE | MT_SECURE)
 #endif
 
-#if SEPARATE_NOBITS_REGION
-#define MAP_BL31_NOBITS		MAP_REGION_FLAT(			\
-					BL31_NOBITS_BASE,		\
-					BL31_NOBITS_LIMIT 		\
-						- BL31_NOBITS_BASE,	\
-					MT_MEMORY | MT_RW | MT_SECURE)
-
-#endif
 /*******************************************************************************
  * Return a pointer to the 'entry_point_info' structure of the next image for the
  * security state specified. BL33 corresponds to the non-secure image type
@@ -302,9 +294,6 @@ void __init arm_bl31_plat_arch_setup(void)
 		MAP_BL31_TOTAL,
 #if RECLAIM_INIT_CODE
 		MAP_BL_INIT_CODE,
-#endif
-#if SEPARATE_NOBITS_REGION
-		MAP_BL31_NOBITS,
 #endif
 		ARM_MAP_BL_RO,
 #if USE_ROMLIB

plat/arm/common/arm_common.mk

 #
-# Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -125,23 +125,6 @@ ENABLE_PMF			:=	1
 # mapping the former as executable and the latter as execute-never.
 SEPARATE_CODE_AND_RODATA	:=	1
 
-# On ARM platforms, disable SEPARATE_NOBITS_REGION by default. Both PROGBITS
-# and NOBITS sections of BL31 image are adjacent to each other and loaded
-# into Trusted SRAM.
-SEPARATE_NOBITS_REGION		:=	0
-
-# In order to support SEPARATE_NOBITS_REGION for Arm platforms, we need to load
-# BL31 PROGBITS into secure DRAM space and BL31 NOBITS into SRAM. Hence mandate
-# the build to require that ARM_BL31_IN_DRAM is enabled as well.
-ifeq ($(SEPARATE_NOBITS_REGION),1)
-    ifneq ($(ARM_BL31_IN_DRAM),1)
-         $(error For SEPARATE_NOBITS_REGION, ARM_BL31_IN_DRAM must be enabled)
-    endif
-    ifneq ($(RECLAIM_INIT_CODE),0)
-          $(error For SEPARATE_NOBITS_REGION, RECLAIM_INIT_CODE cannot be supported)
-    endif
-endif
-
 # Disable ARM Cryptocell by default
 ARM_CRYPTOCELL_INTEG		:=	0
 $(eval $(call assert_boolean,ARM_CRYPTOCELL_INTEG))