feat(plat): add platform API that gets cluster ID
This patch adds an API(plat_cluster_id_by_mpidr)
that retrieves the cluster ID by looking at
the MPIDR_EL1 for platforms that have ARM_PLAT_MT set
Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
Change-Id: I0266f2e49a3114d169a7708d7ddbd4f6229a7a41
diff --git a/include/plat/arm/common/plat_arm.h b/include/plat/arm/common/plat_arm.h
index 161e931..d778201 100644
--- a/include/plat/arm/common/plat_arm.h
+++ b/include/plat/arm/common/plat_arm.h
@@ -383,6 +383,8 @@
unsigned int plat_arm_get_cpu_pe_count(u_register_t mpidr);
#endif
+unsigned int plat_cluster_id_by_mpidr(u_register_t mpidr);
+
/*
* This function is called after loading SCP_BL2 image and it is used to perform
* any platform-specific actions required to handle the SCP firmware.
diff --git a/plat/arm/board/tc/tc_topology.c b/plat/arm/board/tc/tc_topology.c
index cc0dcc2..7631873 100644
--- a/plat/arm/board/tc/tc_topology.c
+++ b/plat/arm/board/tc/tc_topology.c
@@ -65,3 +65,11 @@
return PLAT_MAX_PE_PER_CPU;
}
#endif
+
+/******************************************************************************
+ * Return the cluster ID of current CPU
+ *****************************************************************************/
+unsigned int plat_cluster_id_by_mpidr(u_register_t mpidr)
+{
+ return MPIDR_AFFLVL2_VAL(mpidr);
+}