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/plat/arm/board/fvp/fvp_common.c b/plat/arm/board/fvp/fvp_common.c
index a7028f6..45a4721 100644
--- a/plat/arm/board/fvp/fvp_common.c
+++ b/plat/arm/board/fvp/fvp_common.c
@@ -169,6 +169,7 @@
#endif
#if ENABLE_RME
ARM_MAP_GPT_L1_DRAM,
+ ARM_MAP_EL3_RMM_SHARED_MEM,
#endif
{0}
};
@@ -512,3 +513,18 @@
return (int32_t)(((sys_id >> V2M_SYS_ID_REV_SHIFT) &
V2M_SYS_ID_REV_MASK) & SOC_ID_REV_MASK);
}
+
+#if ENABLE_RME
+/*
+ * Get a pointer to the RMM-EL3 Shared buffer and return it
+ * through the pointer passed as parameter.
+ *
+ * This function returns the size of the shared buffer.
+ */
+size_t plat_rmmd_get_el3_rmm_shared_mem(uintptr_t *shared)
+{
+ *shared = (uintptr_t)RMM_SHARED_BASE;
+
+ return (size_t)RMM_SHARED_SIZE;
+}
+#endif