1 /* 2 * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <platform_def.h> 8 9 #include <drivers/arm/gicv2.h> 10 #include <plat/arm/common/plat_arm.h> 11 #include <plat/common/platform.h> 12 13 /****************************************************************************** 14 * The following functions are defined as weak to allow a platform to override 15 * the way the GICv2 driver is initialised and used. 16 *****************************************************************************/ 17 #pragma weak plat_arm_gic_driver_init 18 #pragma weak plat_arm_gic_init 19 #pragma weak plat_arm_gic_cpuif_enable 20 #pragma weak plat_arm_gic_cpuif_disable 21 #pragma weak plat_arm_gic_pcpu_init 22 23 /****************************************************************************** 24 * On a GICv2 system, the Group 1 secure interrupts are treated as Group 0 25 * interrupts. 26 *****************************************************************************/ 27 static const interrupt_prop_t arm_interrupt_props[] = { 28 PLAT_ARM_G1S_IRQ_PROPS(GICV2_INTR_GROUP0), 29 PLAT_ARM_G0_IRQ_PROPS(GICV2_INTR_GROUP0) 30 }; 31 32 static unsigned int target_mask_array[PLATFORM_CORE_COUNT]; 33 34 static const gicv2_driver_data_t arm_gic_data = { 35 .gicd_base = PLAT_ARM_GICD_BASE, 36 .gicc_base = PLAT_ARM_GICC_BASE, 37 .interrupt_props = arm_interrupt_props, 38 .interrupt_props_num = ARRAY_SIZE(arm_interrupt_props), 39 .target_masks = target_mask_array, 40 .target_masks_num = ARRAY_SIZE(target_mask_array), 41 }; 42 43 /****************************************************************************** 44 * ARM common helper to initialize the GICv2 only driver. 45 *****************************************************************************/ 46 void plat_arm_gic_driver_init(void) 47 { 48 gicv2_driver_init(&arm_gic_data); 49 } 50 51 void plat_arm_gic_init(void) 52 { 53 gicv2_distif_init(); 54 gicv2_pcpu_distif_init(); 55 gicv2_set_pe_target_mask(plat_my_core_pos()); 56 gicv2_cpuif_enable(); 57 } 58 59 /****************************************************************************** 60 * ARM common helper to enable the GICv2 CPU interface 61 *****************************************************************************/ 62 void plat_arm_gic_cpuif_enable(void) 63 { 64 gicv2_cpuif_enable(); 65 } 66 67 /****************************************************************************** 68 * ARM common helper to disable the GICv2 CPU interface 69 *****************************************************************************/ 70 void plat_arm_gic_cpuif_disable(void) 71 { 72 gicv2_cpuif_disable(); 73 } 74 75 /****************************************************************************** 76 * ARM common helper to initialize the per cpu distributor interface in GICv2 77 *****************************************************************************/ 78 void plat_arm_gic_pcpu_init(void) 79 { 80 gicv2_pcpu_distif_init(); 81 gicv2_set_pe_target_mask(plat_my_core_pos()); 82 } 83 84 /****************************************************************************** 85 * Stubs for Redistributor power management. Although GICv2 doesn't have 86 * Redistributor interface, these are provided for the sake of uniform GIC API 87 *****************************************************************************/ 88 void plat_arm_gic_redistif_on(void) 89 { 90 return; 91 } 92 93 void plat_arm_gic_redistif_off(void) 94 { 95 return; 96 } 97 98 99 /****************************************************************************** 100 * ARM common helper to save & restore the GICv3 on resume from system suspend. 101 * The normal world currently takes care of saving and restoring the GICv2 102 * registers due to legacy reasons. Hence we just initialize the Distributor 103 * on resume from system suspend. 104 *****************************************************************************/ 105 void plat_arm_gic_save(void) 106 { 107 return; 108 } 109 110 void plat_arm_gic_resume(void) 111 { 112 gicv2_distif_init(); 113 gicv2_pcpu_distif_init(); 114 } 115