feat(rmmd): add support for RMM Boot interface
This patch adds the infrastructure needed to pass boot arguments from
EL3 to RMM and allocates a shared buffer between both worlds that can
be used, among others, to pass a boot manifest to RMM. The buffer is
composed a single memory page be used by a later EL3 <-> RMM interface
by all CPUs.
The RMM boot manifest is not implemented by this patch.
In addition to that, this patch also enables support for RMM when
RESET_TO_BL31 is enabled.
Signed-off-by: Javier Almansa Sobrino <javier.almansasobrino@arm.com>
Change-Id: I855cd4758ee3843eadd9fb482d70a6d18954d82a
diff --git a/include/plat/arm/common/arm_pas_def.h b/include/plat/arm/common/arm_pas_def.h
index 4fee41b..c199302 100644
--- a/include/plat/arm/common/arm_pas_def.h
+++ b/include/plat/arm/common/arm_pas_def.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2021, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2021-2022, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -61,6 +61,10 @@
#define ARM_PAS_2_BASE (ARM_PAS_1_BASE + ARM_PAS_1_SIZE)
#define ARM_PAS_2_SIZE (ARM_NS_DRAM1_SIZE)
+/* Shared area between EL3 and RMM */
+#define ARM_PAS_SHARED_BASE (ARM_EL3_RMM_SHARED_BASE)
+#define ARM_PAS_SHARED_SIZE (ARM_EL3_RMM_SHARED_SIZE)
+
/* Secure TZC region */
#define ARM_PAS_3_BASE (ARM_AP_TZC_DRAM1_BASE)
#define ARM_PAS_3_SIZE (ARM_AP_TZC_DRAM1_SIZE)
@@ -76,8 +80,13 @@
ARM_PAS_3_SIZE, \
GPT_GPI_SECURE)
+/*
+ * REALM and Shared area share the same PAS, so consider them a single
+ * PAS region to configure in GPT.
+ */
#define ARM_PAS_REALM GPT_MAP_REGION_GRANULE(ARM_REALM_BASE, \
- ARM_REALM_SIZE, \
+ (ARM_PAS_SHARED_SIZE + \
+ ARM_REALM_SIZE), \
GPT_GPI_REALM)
#define ARM_PAS_EL3_DRAM GPT_MAP_REGION_GRANULE(ARM_EL3_TZC_DRAM1_BASE, \