Support shared Mbed TLS heap for FVP
This patch introduces the shared Mbed TLS heap optimisation for Arm
platforms. The objective is the Mbed TLS heap to be shared between BL1
and BL2 so as to not allocate the heap memory twice. To achieve that,
the patch introduces all the necessary helpers for implementing this
optimisation. It also applies it for FVP.
Change-Id: I6d85eaa1361517b7490956b2ac50f5fa0d0bb008
Signed-off-by: John Tsichritzis <john.tsichritzis@arm.com>
diff --git a/include/plat/arm/common/arm_def.h b/include/plat/arm/common/arm_def.h
index ea9d811..c499417 100644
--- a/include/plat/arm/common/arm_def.h
+++ b/include/plat/arm/common/arm_def.h
@@ -242,6 +242,17 @@
MT_MEMORY | MT_RW | MT_SECURE)
/*
+ * Mapping for the BL1 RW region. This mapping is needed by BL2 in order to
+ * share the Mbed TLS heap. Since the heap is allocated inside BL1, it resides
+ * in the BL1 RW region. Hence, BL2 needs access to the BL1 RW region in order
+ * to be able to access the heap.
+ */
+#define ARM_MAP_BL1_RW MAP_REGION_FLAT( \
+ BL1_RW_BASE, \
+ BL1_RW_LIMIT - BL1_RW_BASE, \
+ MT_MEMORY | MT_RW | MT_SECURE)
+
+/*
* If SEPARATE_CODE_AND_RODATA=1 we define a region for each section
* otherwise one region is defined containing both.
*/