Tegra: introduce support for GICv3

This patch provides the platform level support to enable GICv3
drivers on future Tegra platforms.
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Change-Id: I966a4502b2a4a7bd1ce66da843997c9ed605c59f

plat/nvidia/tegra/common/tegra_common.mk

@@ -14,6 +14,12 @@ PLAT_BL_COMMON_SOURCES	+=	${XLAT_TABLES_LIB_SRCS}
 
 COMMON_DIR		:=	plat/nvidia/tegra/common
 
+# Include GICv3 driver files
+include drivers/arm/gic/v3/gicv3.mk
+TEGRA_GICv3_SOURCES	:=	$(GICV3_SOURCES)				\
+				plat/common/plat_gicv3.c			\
+				${COMMON_DIR}/tegra_gicv3.c
+
 TEGRA_GICv2_SOURCES	:=	drivers/arm/gic/common/gic_common.c		\
 				drivers/arm/gic/v2/gicv2_main.c			\
 				drivers/arm/gic/v2/gicv2_helpers.c		\

plat/nvidia/tegra/common/tegra_gicv3.c

+/*
+ * Copyright (c) 2020, NVIDIA Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <common/bl_common.h>
+#include <drivers/arm/gicv3.h>
+#include <lib/utils.h>
+
+#include <plat/common/platform.h>
+#include <platform_def.h>
+#include <tegra_private.h>
+#include <tegra_def.h>
+
+/* The GICv3 driver only needs to be initialized in EL3 */
+static uintptr_t rdistif_base_addrs[PLATFORM_CORE_COUNT];
+
+static unsigned int plat_tegra_mpidr_to_core_pos(unsigned long mpidr)
+{
+	return (unsigned int)plat_core_pos_by_mpidr(mpidr);
+}
+
+/******************************************************************************
+ * Tegra common helper to setup the GICv3 driver data.
+ *****************************************************************************/
+void tegra_gic_setup(const interrupt_prop_t *interrupt_props,
+		     unsigned int interrupt_props_num)
+{
+	/*
+	 * Tegra GIC configuration settings
+	 */
+	static gicv3_driver_data_t tegra_gic_data;
+
+	/*
+	 * Register Tegra GICv3 driver
+	 */
+	tegra_gic_data.gicd_base = TEGRA_GICD_BASE;
+	tegra_gic_data.gicr_base = TEGRA_GICR_BASE;
+	tegra_gic_data.rdistif_num = PLATFORM_CORE_COUNT;
+	tegra_gic_data.rdistif_base_addrs = rdistif_base_addrs;
+	tegra_gic_data.mpidr_to_core_pos = plat_tegra_mpidr_to_core_pos;
+	tegra_gic_data.interrupt_props = interrupt_props;
+	tegra_gic_data.interrupt_props_num = interrupt_props_num;
+	gicv3_driver_init(&tegra_gic_data);
+
+	/* initialize the GICD and GICR */
+	tegra_gic_init();
+}
+
+/******************************************************************************
+ * Tegra common helper to initialize the GICv3 only driver.
+ *****************************************************************************/
+void tegra_gic_init(void)
+{
+	gicv3_distif_init();
+	gicv3_rdistif_init(plat_my_core_pos());
+	gicv3_cpuif_enable(plat_my_core_pos());
+}
+
+/******************************************************************************
+ * Tegra common helper to disable the GICv3 CPU interface
+ *****************************************************************************/
+void tegra_gic_cpuif_deactivate(void)
+{
+	gicv3_cpuif_disable(plat_my_core_pos());
+}
+
+/******************************************************************************
+ * Tegra common helper to initialize the per cpu distributor interface
+ * in GICv3
+ *****************************************************************************/
+void tegra_gic_pcpu_init(void)
+{
+	gicv3_rdistif_init(plat_my_core_pos());
+	gicv3_cpuif_enable(plat_my_core_pos());
+}