1 files changed, 57 insertions, 0 deletions
diff --git a/plat/arm/common/arm_ccn.c b/plat/arm/common/arm_ccn.c
new file mode 100644
index 0000000..2e681ca
--- /dev/null
+++ b/plat/arm/common/arm_ccn.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <platform_def.h>
+
+#include <arch.h>
+#include <drivers/arm/ccn.h>
+#include <plat/arm/common/plat_arm.h>
+
+static const unsigned char master_to_rn_id_map[] = {
+	PLAT_ARM_CLUSTER_TO_CCN_ID_MAP
+};
+
+static const ccn_desc_t arm_ccn_desc = {
+	.periphbase = PLAT_ARM_CCN_BASE,
+	.num_masters = ARRAY_SIZE(master_to_rn_id_map),
+	.master_to_rn_id_map = master_to_rn_id_map
+};
+
+CASSERT(PLAT_ARM_CLUSTER_COUNT == ARRAY_SIZE(master_to_rn_id_map),
+		assert_invalid_cluster_count_for_ccn_variant);
+
+/******************************************************************************
+ * The following functions are defined as weak to allow a platform to override
+ * the way ARM CCN driver is initialised and used.
+ *****************************************************************************/
+#pragma weak plat_arm_interconnect_init
+#pragma weak plat_arm_interconnect_enter_coherency
+#pragma weak plat_arm_interconnect_exit_coherency
+
+
+/******************************************************************************
+ * Helper function to initialize ARM CCN driver.
+ *****************************************************************************/
+void __init plat_arm_interconnect_init(void)
+{
+	ccn_init(&arm_ccn_desc);
+}
+
+/******************************************************************************
+ * Helper function to place current master into coherency
+ *****************************************************************************/
+void plat_arm_interconnect_enter_coherency(void)
+{
+	ccn_enter_snoop_dvm_domain(1 << MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
+}
+
+/******************************************************************************
+ * Helper function to remove current master from coherency
+ *****************************************************************************/
+void plat_arm_interconnect_exit_coherency(void)
+{
+	ccn_exit_snoop_dvm_domain(1 << MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
+}