feat(imx8mn): add BL31 PIE support

Enable PIE support so the BL31 firmware can be loaded from anywhere
within the OCRAM (SRAM). For the PIE support we only need to replace the
BL31_BASE define by the BL31_START symbol which is a relocatable and we
need to enable it by setting ENABLE_PIE := 1.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Change-Id: I33c8e35c35112d70d2725eebe484a853a8aad9e0

diff --git a/plat/imx/imx8m/imx8mn/imx8mn_bl31_setup.c b/plat/imx/imx8m/imx8mn/imx8mn_bl31_setup.c
index da5c9eecfc660fbfd2bf3608d0483835cd794cc9..c8b2ce746df66d2a72fd0e8df6eb3bdacecba3c7 100644 (file)
--- a/plat/imx/imx8m/imx8mn/imx8mn_bl31_setup.c
+++ b/plat/imx/imx8m/imx8mn/imx8mn_bl31_setup.c
@@ -180,7 +180,7 @@ void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
 }
 
 #define MAP_BL31_TOTAL                                                                            \
-       MAP_REGION_FLAT(BL31_BASE, BL31_SIZE, MT_MEMORY | MT_RW | MT_SECURE)
+       MAP_REGION_FLAT(BL31_START, BL31_SIZE, MT_MEMORY | MT_RW | MT_SECURE)
 #define MAP_BL31_RO                                                                               \
        MAP_REGION_FLAT(BL_CODE_BASE, BL_CODE_END - BL_CODE_BASE, MT_MEMORY | MT_RO | MT_SECURE)
 #define MAP_COHERENT_MEM                                                                          \

diff --git a/plat/imx/imx8m/imx8mn/platform.mk b/plat/imx/imx8m/imx8mn/platform.mk
index 0f3ad1a20542bd4507baeec61543a5b0fd9b317b..8b93ed461ca0117b1291ec5f2486c1a129572e2f 100644 (file)
--- a/plat/imx/imx8m/imx8mn/platform.mk
+++ b/plat/imx/imx8m/imx8mn/platform.mk
@@ -47,6 +47,7 @@ BL31_SOURCES          +=      plat/imx/common/imx8_helpers.S                  \
                                ${IMX_GIC_SOURCES}                              \
                                ${XLAT_TABLES_LIB_SRCS}
 
+ENABLE_PIE             :=      1
 USE_COHERENT_MEM       :=      1
 RESET_TO_BL31          :=      1
 A53_DISABLE_NON_TEMPORAL_HINT := 0