SPM: Move shim layer to TTBR1_EL1
This gives each Secure Partition complete freedom on its address space.
Previously, the memory used by the exception vectors was reserved and
couldn't be used. Also, it always had to be mapped, forcing SPM to
generate translation tables that included the exception vectors as well
as the Partition memory regions. With this change, partitions can reduce
their address space size easily.
Change-Id: I67fb5e9bdf2870b73347f23bff702fab0a8f8711
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/services/std_svc/spm/spm_shim_private.h b/services/std_svc/spm/spm_shim_private.h
index 7fe9692..fc510b1 100644
--- a/services/std_svc/spm/spm_shim_private.h
+++ b/services/std_svc/spm/spm_shim_private.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -23,4 +23,12 @@
#define SPM_SHIM_EXCEPTIONS_SIZE \
(SPM_SHIM_EXCEPTIONS_END - SPM_SHIM_EXCEPTIONS_START)
+/*
+ * Use the smallest virtual address space size allowed in ARMv8.0 for
+ * compatibility.
+ */
+#define SPM_SHIM_XLAT_VIRT_ADDR_SPACE_SIZE (1ULL << 25)
+#define SPM_SHIM_MMAP_REGIONS 1
+#define SPM_SHIM_XLAT_TABLES 1
+
#endif /* SPM_SHIM_PRIVATE_H */