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feat(stm32mp2): disable PIE by default on STM32MP2 platform

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Allow to disable ENABLE_PIE on STM32MP2. BL31 is loaded at the beginning
of SYSRAM whatever the options set. Set ENABLE_PIE to 0 by default.
This should allow us to reduce BL31 and BL2 size.

Change-Id: Ie8c83c9205e81301eb1fdcf24b94216172586630
Signed-off-by: Maxime Méré <maxime.mere@foss.st.com>
This commit is contained in:
Maxime Méré 2024-12-10 10:55:58 +01:00 • committed by Yann Gautier
parent 104ec53ed1
commit ac9abe7e59
3 changed files with 13 additions and 5 deletions
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9
plat/st/stm32mp2/include/platform_def.h
View file

@ -73,8 +73,15 @@
/*******************************************************************************
* BL31 specific defines.
******************************************************************************/
#if ENABLE_PIE
#define BL31_BASE 0
#define BL31_LIMIT (STM32MP_SYSRAM_SIZE / 2)
#else
#define BL31_BASE STM32MP_SYSRAM_BASE
#endif
#define BL31_LIMIT (BL31_BASE + (STM32MP_SYSRAM_SIZE / 2))
#define BL31_PROGBITS_LIMIT (BL31_BASE + STM32MP_BL31_SIZE)
/*******************************************************************************
* BL33 specific defines.

7
plat/st/stm32mp2/platform.mk
View file

@ -1,5 +1,5 @@
#
# Copyright (c) 2023-2024, STMicroelectronics - All Rights Reserved
# Copyright (c) 2023-2025, STMicroelectronics - All Rights Reserved
#
# SPDX-License-Identifier: BSD-3-Clause
#
@ -11,9 +11,12 @@ STM32_EXTRA_PARTS := 6
include plat/st/common/common.mk
CRASH_REPORTING := 1
ENABLE_PIE := 1
# Disable PIE by default. To re-enable it, uncomment next line.
#ENABLE_PIE := 1
PROGRAMMABLE_RESET_ADDRESS := 1
ifeq ($(ENABLE_PIE),1)
BL2_IN_XIP_MEM := 1
endif
STM32MP_BL33_EL1 ?= 1
ifeq ($(STM32MP_BL33_EL1),1)

2
plat/st/stm32mp2/stm32mp2_def.h
View file

@ -114,8 +114,6 @@ enum ddr_type {
#define STM32MP_BL31_SIZE (STM32MP_SYSRAM_SIZE - \
STM32MP_BL2_SIZE)
#define BL31_PROGBITS_LIMIT STM32MP_BL31_SIZE
#define STM32MP_BL2_BASE (STM32MP_SYSRAM_BASE + \
STM32MP_SYSRAM_SIZE - \
STM32MP_BL2_SIZE)