53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
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/*
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* Copyright (c) 2020, Arm Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <common/debug.h>
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#include <common/fdt_wrappers.h>
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#include <fconf_hw_config_getter.h>
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#include <libfdt.h>
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#include <plat/common/platform.h>
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struct gicv3_config_t gicv3_config;
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int fconf_populate_gicv3_config(uintptr_t config)
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{
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int err;
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int node;
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int addr[20];
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/* Necessary to work with libfdt APIs */
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const void *hw_config_dtb = (const void *)config;
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/*
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* Find the offset of the node containing "arm,gic-v3" compatible property.
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* Populating fconf strucutures dynamically is not supported for legacy
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* systems which use GICv2 IP. Simply skip extracting GIC properties.
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*/
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node = fdt_node_offset_by_compatible(hw_config_dtb, -1, "arm,gic-v3");
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if (node < 0) {
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WARN("FCONF: Unable to locate node with arm,gic-v3 compatible property\n");
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return 0;
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}
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/* Read the reg cell holding base address of GIC controller modules
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A sample reg cell array is shown here:
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reg = <0x0 0x2f000000 0 0x10000>, // GICD
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<0x0 0x2f100000 0 0x200000>, // GICR
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<0x0 0x2c000000 0 0x2000>, // GICC
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<0x0 0x2c010000 0 0x2000>, // GICH
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<0x0 0x2c02f000 0 0x2000>; // GICV
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*/
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err = fdtw_read_array(hw_config_dtb, node, "reg", 20, &addr);
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if (err < 0) {
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ERROR("FCONF: Failed to read reg property of GIC node\n");
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}
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return err;
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}
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FCONF_REGISTER_POPULATOR(HW_CONFIG, gicv3_config, fconf_populate_gicv3_config);
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