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 *****************************************************************************/
plat_arm_gic_driver_init(void)45 void plat_arm_gic_driver_init(void)
46 {
47 gicv2_driver_init(&arm_gic_data);
48 }
49
plat_arm_gic_init(void)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 *****************************************************************************/
plat_arm_gic_cpuif_enable(void)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 *****************************************************************************/
plat_arm_gic_cpuif_disable(void)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 *****************************************************************************/
plat_arm_gic_pcpu_init(void)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 *****************************************************************************/
plat_arm_gic_redistif_on(void)87 void plat_arm_gic_redistif_on(void)
88 {
89 return;
90 }
91
plat_arm_gic_redistif_off(void)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 *****************************************************************************/
plat_arm_gic_save(void)104 void plat_arm_gic_save(void)
105 {
106 return;
107 }
108
plat_arm_gic_resume(void)109 void plat_arm_gic_resume(void)
110 {
111 gicv2_distif_init();
112 gicv2_pcpu_distif_init();
113 }
114