GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/trusted-firmware/trusted-firmware-a-2.8/plat/arm/common/arm_gicv2.c

@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <platform_def.h>
+
+#include <drivers/arm/gicv2.h>
+#include <plat/arm/common/plat_arm.h>
+#include <plat/common/platform.h>
+
+/******************************************************************************
+ * The following functions are defined as weak to allow a platform to override
+ * the way the GICv2 driver is initialised and used.
+ *****************************************************************************/
+#pragma weak plat_arm_gic_driver_init
+#pragma weak plat_arm_gic_init
+#pragma weak plat_arm_gic_cpuif_enable
+#pragma weak plat_arm_gic_cpuif_disable
+#pragma weak plat_arm_gic_pcpu_init
+
+/******************************************************************************
+ * On a GICv2 system, the Group 1 secure interrupts are treated as Group 0
+ * interrupts.
+ *****************************************************************************/
+static const interrupt_prop_t arm_interrupt_props[] = {
+	PLAT_ARM_G1S_IRQ_PROPS(GICV2_INTR_GROUP0),
+	PLAT_ARM_G0_IRQ_PROPS(GICV2_INTR_GROUP0)
+};
+
+static unsigned int target_mask_array[PLATFORM_CORE_COUNT];
+
+static const gicv2_driver_data_t arm_gic_data = {
+	.gicd_base = PLAT_ARM_GICD_BASE,
+	.gicc_base = PLAT_ARM_GICC_BASE,
+	.interrupt_props = arm_interrupt_props,
+	.interrupt_props_num = ARRAY_SIZE(arm_interrupt_props),
+	.target_masks = target_mask_array,
+	.target_masks_num = ARRAY_SIZE(target_mask_array),
+};
+
+/******************************************************************************
+ * ARM common helper to initialize the GICv2 only driver.
+ *****************************************************************************/
+void plat_arm_gic_driver_init(void)
+{
+	gicv2_driver_init(&arm_gic_data);
+}
+
+void plat_arm_gic_init(void)
+{
+	gicv2_distif_init();
+	gicv2_pcpu_distif_init();
+	gicv2_set_pe_target_mask(plat_my_core_pos());
+	gicv2_cpuif_enable();
+}
+
+/******************************************************************************
+ * ARM common helper to enable the GICv2 CPU interface
+ *****************************************************************************/
+void plat_arm_gic_cpuif_enable(void)
+{
+	gicv2_cpuif_enable();
+}
+
+/******************************************************************************
+ * ARM common helper to disable the GICv2 CPU interface
+ *****************************************************************************/
+void plat_arm_gic_cpuif_disable(void)
+{
+	gicv2_cpuif_disable();
+}
+
+/******************************************************************************
+ * ARM common helper to initialize the per cpu distributor interface in GICv2
+ *****************************************************************************/
+void plat_arm_gic_pcpu_init(void)
+{
+	gicv2_pcpu_distif_init();
+	gicv2_set_pe_target_mask(plat_my_core_pos());
+}
+
+/******************************************************************************
+ * Stubs for Redistributor power management. Although GICv2 doesn't have
+ * Redistributor interface, these are provided for the sake of uniform GIC API
+ *****************************************************************************/
+void plat_arm_gic_redistif_on(void)
+{
+	return;
+}
+
+void plat_arm_gic_redistif_off(void)
+{
+	return;
+}
+
+
+/******************************************************************************
+ * ARM common helper to save & restore the GICv3 on resume from system suspend.
+ * The normal world currently takes care of saving and restoring the GICv2
+ * registers due to legacy reasons. Hence we just initialize the Distributor
+ * on resume from system suspend.
+ *****************************************************************************/
+void plat_arm_gic_save(void)
+{
+	return;
+}
+
+void plat_arm_gic_resume(void)
+{
+	gicv2_distif_init();
+	gicv2_pcpu_distif_init();
+}