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path: root/drivers/nxp/interconnect/ls_cci.c
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Diffstat (limited to 'drivers/nxp/interconnect/ls_cci.c')
-rw-r--r--drivers/nxp/interconnect/ls_cci.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/nxp/interconnect/ls_cci.c b/drivers/nxp/interconnect/ls_cci.c
new file mode 100644
index 0000000000..72a898abd4
--- /dev/null
+++ b/drivers/nxp/interconnect/ls_cci.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2020 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#include <arch.h>
+#include <cci.h>
+
+#include <plat_arm.h>
+
+/******************************************************************************
+ * The following functions are defined as weak to allow a platform to override
+ * the way ARM CCI driver is initialised and used.
+ *****************************************************************************/
+#pragma weak plat_arm_interconnect_enter_coherency
+#pragma weak plat_arm_interconnect_exit_coherency
+
+/******************************************************************************
+ * Helper function to place current master into coherency
+ *****************************************************************************/
+void plat_ls_interconnect_enter_coherency(unsigned int num_clusters)
+{
+ cci_enable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
+
+ for (uint32_t index = 1U; index < num_clusters; index++) {
+ cci_enable_snoop_dvm_reqs(index);
+ }
+}
+
+/******************************************************************************
+ * Helper function to remove current master from coherency
+ *****************************************************************************/
+void plat_ls_interconnect_exit_coherency(void)
+{
+ cci_disable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
+}