1*e2e90fa1SBoyan Karatotev /*
2*e2e90fa1SBoyan Karatotev * Copyright (c) 2025, Arm Limited and Contributors. All rights reserved.
3*e2e90fa1SBoyan Karatotev *
4*e2e90fa1SBoyan Karatotev * SPDX-License-Identifier: BSD-3-Clause
5*e2e90fa1SBoyan Karatotev */
6*e2e90fa1SBoyan Karatotev
7*e2e90fa1SBoyan Karatotev #include <common/debug.h>
8*e2e90fa1SBoyan Karatotev #include <common/fdt_wrappers.h>
9*e2e90fa1SBoyan Karatotev #include <drivers/arm/gicv3.h>
10*e2e90fa1SBoyan Karatotev
11*e2e90fa1SBoyan Karatotev #include <fconf_hw_config_getter.h>
12*e2e90fa1SBoyan Karatotev
13*e2e90fa1SBoyan Karatotev struct gicv3_config_t gicv3_config;
14*e2e90fa1SBoyan Karatotev
fconf_populate_gicv3_config(uintptr_t config)15*e2e90fa1SBoyan Karatotev int fconf_populate_gicv3_config(uintptr_t config)
16*e2e90fa1SBoyan Karatotev {
17*e2e90fa1SBoyan Karatotev int err;
18*e2e90fa1SBoyan Karatotev int node;
19*e2e90fa1SBoyan Karatotev uintptr_t addr;
20*e2e90fa1SBoyan Karatotev
21*e2e90fa1SBoyan Karatotev /* Necessary to work with libfdt APIs */
22*e2e90fa1SBoyan Karatotev const void *hw_config_dtb = (const void *)config;
23*e2e90fa1SBoyan Karatotev
24*e2e90fa1SBoyan Karatotev /*
25*e2e90fa1SBoyan Karatotev * Find the offset of the node containing "arm,gic-v3" compatible property.
26*e2e90fa1SBoyan Karatotev * Populating fconf strucutures dynamically is not supported for legacy
27*e2e90fa1SBoyan Karatotev * systems which use GICv2 IP. Simply skip extracting GIC properties.
28*e2e90fa1SBoyan Karatotev */
29*e2e90fa1SBoyan Karatotev node = fdt_node_offset_by_compatible(hw_config_dtb, -1, "arm,gic-v3");
30*e2e90fa1SBoyan Karatotev if (node < 0) {
31*e2e90fa1SBoyan Karatotev WARN("FCONF: Unable to locate node with arm,gic-v3 compatible property\n");
32*e2e90fa1SBoyan Karatotev return 0;
33*e2e90fa1SBoyan Karatotev }
34*e2e90fa1SBoyan Karatotev /* The GICv3 DT binding holds at least two address/size pairs,
35*e2e90fa1SBoyan Karatotev * the first describing the distributor, the second the redistributors.
36*e2e90fa1SBoyan Karatotev * See: bindings/interrupt-controller/arm,gic-v3.yaml
37*e2e90fa1SBoyan Karatotev */
38*e2e90fa1SBoyan Karatotev err = fdt_get_reg_props_by_index(hw_config_dtb, node, 0, &addr, NULL);
39*e2e90fa1SBoyan Karatotev if (err < 0) {
40*e2e90fa1SBoyan Karatotev ERROR("FCONF: Failed to read GICD reg property of GIC node\n");
41*e2e90fa1SBoyan Karatotev return err;
42*e2e90fa1SBoyan Karatotev }
43*e2e90fa1SBoyan Karatotev gicv3_config.gicd_base = addr;
44*e2e90fa1SBoyan Karatotev
45*e2e90fa1SBoyan Karatotev err = fdt_get_reg_props_by_index(hw_config_dtb, node, 1, &addr, NULL);
46*e2e90fa1SBoyan Karatotev if (err < 0) {
47*e2e90fa1SBoyan Karatotev ERROR("FCONF: Failed to read GICR reg property of GIC node\n");
48*e2e90fa1SBoyan Karatotev } else {
49*e2e90fa1SBoyan Karatotev gicv3_config.gicr_base = addr;
50*e2e90fa1SBoyan Karatotev }
51*e2e90fa1SBoyan Karatotev
52*e2e90fa1SBoyan Karatotev return err;
53*e2e90fa1SBoyan Karatotev }
54*e2e90fa1SBoyan Karatotev FCONF_REGISTER_POPULATOR(HW_CONFIG, gicv3_config, fconf_populate_gicv3_config);
55