1 /* 2 * Copyright (c) 2015-2025, Arm Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <drivers/arm/gicv2.h> 8 #include <plat/arm/common/plat_arm.h> 9 #include <plat/common/platform.h> 10 #include <platform_def.h> 11 12 /****************************************************************************** 13 * The following functions are defined as weak to allow a platform to override 14 * the way the GICv2 driver is initialised and used. 15 *****************************************************************************/ 16 #pragma weak plat_arm_gic_driver_init 17 #pragma weak plat_arm_gic_init 18 #pragma weak plat_arm_gic_cpuif_enable 19 #pragma weak plat_arm_gic_cpuif_disable 20 #pragma weak plat_arm_gic_pcpu_init 21 22 /****************************************************************************** 23 * On a GICv2 system, the Group 1 secure interrupts are treated as Group 0 24 * interrupts. 25 *****************************************************************************/ 26 static const interrupt_prop_t arm_interrupt_props[] = { 27 PLAT_ARM_G1S_IRQ_PROPS(GICV2_INTR_GROUP0), 28 PLAT_ARM_G0_IRQ_PROPS(GICV2_INTR_GROUP0) 29 }; 30 31 static unsigned int target_mask_array[PLATFORM_CORE_COUNT]; 32 33 static const gicv2_driver_data_t arm_gic_data = { 34 .gicd_base = PLAT_ARM_GICD_BASE, 35 .gicc_base = PLAT_ARM_GICC_BASE, 36 .interrupt_props = arm_interrupt_props, 37 .interrupt_props_num = ARRAY_SIZE(arm_interrupt_props), 38 .target_masks = target_mask_array, 39 .target_masks_num = ARRAY_SIZE(target_mask_array), 40 }; 41 42 /****************************************************************************** 43 * ARM common helper to initialize the GICv2 only driver. 44 *****************************************************************************/ 45 void plat_arm_gic_driver_init(void) 46 { 47 gicv2_driver_init(&arm_gic_data); 48 } 49 50 void plat_arm_gic_init(void) 51 { 52 gicv2_distif_init(); 53 gicv2_pcpu_distif_init(); 54 gicv2_set_pe_target_mask(plat_my_core_pos()); 55 gicv2_cpuif_enable(); 56 } 57 58 /****************************************************************************** 59 * ARM common helper to enable the GICv2 CPU interface 60 *****************************************************************************/ 61 void plat_arm_gic_cpuif_enable(void) 62 { 63 gicv2_cpuif_enable(); 64 } 65 66 /****************************************************************************** 67 * ARM common helper to disable the GICv2 CPU interface 68 *****************************************************************************/ 69 void plat_arm_gic_cpuif_disable(void) 70 { 71 gicv2_cpuif_disable(); 72 } 73 74 /****************************************************************************** 75 * ARM common helper to initialize the per cpu distributor interface in GICv2 76 *****************************************************************************/ 77 void plat_arm_gic_pcpu_init(void) 78 { 79 gicv2_pcpu_distif_init(); 80 gicv2_set_pe_target_mask(plat_my_core_pos()); 81 } 82 83 /****************************************************************************** 84 * Stubs for Redistributor power management. Although GICv2 doesn't have 85 * Redistributor interface, these are provided for the sake of uniform GIC API 86 *****************************************************************************/ 87 void plat_arm_gic_redistif_on(void) 88 { 89 return; 90 } 91 92 void plat_arm_gic_redistif_off(void) 93 { 94 return; 95 } 96 97 98 /****************************************************************************** 99 * ARM common helper to save & restore the GICv3 on resume from system suspend. 100 * The normal world currently takes care of saving and restoring the GICv2 101 * registers due to legacy reasons. Hence we just initialize the Distributor 102 * on resume from system suspend. 103 *****************************************************************************/ 104 void plat_arm_gic_save(void) 105 { 106 return; 107 } 108 109 void plat_arm_gic_resume(void) 110 { 111 gicv2_distif_init(); 112 gicv2_pcpu_distif_init(); 113 } 114