Tegra: support to compile native GICv2 drivers

This patch adds a macro to allow platforms to compile native
GICv2 drivers along with Tegra handlers.

Change-Id: I8281796c09dae5704cff2daab831395d65e261b7
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

plat/nvidia/tegra/common/tegra_common.mk

@@ -13,6 +13,12 @@ PLAT_BL_COMMON_SOURCES	+=	${XLAT_TABLES_LIB_SRCS}
 
 COMMON_DIR		:=	plat/nvidia/tegra/common
 
+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/common/plat_gicv2.c			\
+				${COMMON_DIR}/tegra_gicv2.c
+
 BL31_SOURCES		+=	drivers/console/aarch64/console.S		\
 				drivers/delay_timer/delay_timer.c		\
 				drivers/ti/uart/aarch64/16550_console.S		\

plat/nvidia/tegra/common/tegra_gicv2.c

+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <bl_common.h>
+#include <gicv2.h>
+#include <platform_def.h>
+#include <tegra_private.h>
+#include <tegra_def.h>
+#include <utils.h>
+
+/******************************************************************************
+ * Tegra common helper to setup the GICv2 driver data.
+ *****************************************************************************/
+void tegra_gic_setup(tegra_gic_cfg_t *cfg)
+{
+	/*
+	 * Tegra GIC configuration settings
+	 */
+	static gicv2_driver_data_t tegra_gic_data;
+
+	/*
+	 * Register Tegra GICv2 driver
+	 */
+	tegra_gic_data.gicd_base = TEGRA_GICD_BASE;
+	tegra_gic_data.gicc_base = TEGRA_GICC_BASE;
+	tegra_gic_data.g0_interrupt_num = cfg->g0_int_num;
+	tegra_gic_data.g0_interrupt_array = cfg->g0_int_array;
+	gicv2_driver_init(&tegra_gic_data);
+}
+
+/******************************************************************************
+ * Tegra common helper to initialize the GICv2 only driver.
+ *****************************************************************************/
+void tegra_gic_init(void)
+{
+	gicv2_distif_init();
+	gicv2_pcpu_distif_init();
+	gicv2_cpuif_enable();
+}
+
+/******************************************************************************
+ * Tegra common helper to disable the GICv2 CPU interface
+ *****************************************************************************/
+void tegra_gic_cpuif_deactivate(void)
+{
+	gicv2_cpuif_disable();
+}
+
+/******************************************************************************
+ * Tegra common helper to initialize the per cpu distributor interface
+ * in GICv2
+ *****************************************************************************/
+void tegra_gic_pcpu_init(void)
+{
+	gicv2_pcpu_distif_init();
+	gicv2_cpuif_enable();
+}