NXP: Interconnect API based on ARM CCN-CCI driver

CCN API(s) to be used NXP SoC(s) are added.
These API(s) based on ARM CCN driver
- driver/arm/ccn

CCI API(s) to be used NXP SoC(s) are added.
These API(s) based on ARM CCI driver
- driver/arm/cci

Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Change-Id: I7682c4c9bd42f63542b3ffd3cb6c5d2effe4ae0a

drivers/nxp/interconnect/interconnect.mk

@@ -0,0 +1,44 @@
+# Copyright 2020 NXP
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+#
+#------------------------------------------------------------------------------
+#
+# Select the Interconnect files
+#
+# -----------------------------------------------------------------------------
+
+ifeq (${ADD_INTERCONNECT},)
+
+ADD_INTERCONNECT	:= 1
+PLAT_INCLUDES		+= -I${PLAT_DRIVERS_PATH}/interconnect
+
+ifeq (, $(filter $(INTERCONNECT), CCI400 CCN502 CCN504 CCN508))
+    $(error -> Interconnect type not set!)
+else
+$(eval $(call add_define_val,INTERCONNECT,${INTERCONNECT}))
+ifeq ($(INTERCONNECT), $(filter $(INTERCONNECT), CCN502 CCN504 CCN508))
+INTERCONNECT_SOURCES	:= 	drivers/arm/ccn/ccn.c 		\
+				${PLAT_DRIVERS_PATH}/interconnect/ls_ccn.c
+else
+ifeq ($(INTERCONNECT), CCI400)
+INTERCONNECT_SOURCES	:= 	drivers/arm/cci/cci.c 		\
+				${PLAT_DRIVERS_PATH}/interconnect/ls_cci.c
+endif
+endif
+endif
+
+ifeq (${BL_COMM_INTERCONNECT_NEEDED},yes)
+BL_COMMON_SOURCES	+= ${INTERCONNECT_SOURCES}
+else
+ifeq (${BL2_INTERCONNECT_NEEDED},yes)
+BL2_SOURCES		+= ${INTERCONNECT_SOURCES}
+endif
+ifeq (${BL31_INTERCONNECT_NEEDED},yes)
+BL31_SOURCES		+= ${INTERCONNECT_SOURCES}
+endif
+endif
+endif
+
+# -----------------------------------------------------------------------------

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()));
+}

drivers/nxp/interconnect/ls_ccn.c

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2020 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#include <arch.h>
+#include <ccn.h>
+
+#include <plat_arm.h>
+
+/******************************************************************************
+ * Helper function to place current master into coherency
+ *****************************************************************************/
+void plat_ls_interconnect_enter_coherency(unsigned int num_clusters)
+{
+	ccn_enter_snoop_dvm_domain(1ULL << MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
+
+	for (uint32_t index = 1U; index < num_clusters; index++) {
+		ccn_enter_snoop_dvm_domain(1ULL << index);
+	}
+}
+
+/******************************************************************************
+ * Helper function to remove current master from coherency
+ *****************************************************************************/
+void plat_ls_interconnect_exit_coherency(void)
+{
+	ccn_exit_snoop_dvm_domain(1ULL << MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
+}

drivers/nxp/interconnect/ls_interconnect.h

@@ -0,0 +1,19 @@
+/*
+ * Copyright 2020 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#ifndef LS_INTERCONNECT_H
+#define LS_INTERCONNECT_H
+
+#if (INTERCONNECT == CCI400)
+#define CCI_TERMINATE_BARRIER_TX	0x8
+#endif
+
+/* Interconnect CCI/CCN functions */
+void plat_ls_interconnect_enter_coherency(unsigned int num_clusters);
+void plat_ls_interconnect_exit_coherency(void);
+
+#endif