1 /* 2 * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved. 3 * Copyright (c) 2024-2025, Altera Corporation. All rights reserved. 4 * 5 * SPDX-License-Identifier: BSD-3-Clause 6 */ 7 8 #include <assert.h> 9 #include <errno.h> 10 11 #include <arch_helpers.h> 12 #include <common/debug.h> 13 #include <common/fdt_wrappers.h> 14 #include <common/tbbr/tbbr_img_def.h> 15 #include <drivers/arm/gic_common.h> 16 #include <drivers/arm/gicv3.h> 17 #include <drivers/delay_timer.h> 18 #include <lib/mmio.h> 19 #include <lib/utils.h> 20 #include <libfdt.h> 21 #include <platform_def.h> 22 #include <tools_share/firmware_image_package.h> 23 24 #include "socfpga_dt.h" 25 26 static const void *fdt; 27 /******************************************************************************* 28 * This function checks device tree file with its header. 29 * Returns 0 on success and a negative FDT error code on failure. 30 ******************************************************************************/ 31 int socfpga_dt_open_and_check(uintptr_t dt_addr, char *compatible_str) 32 { 33 int ret = 0; 34 int node = 1; 35 36 ret = fdt_check_header((void *)dt_addr); 37 38 if (ret != 0) { 39 ERROR("SOCFPGA: FDT Header invalid\n"); 40 return ret; 41 } 42 43 fdt = (const void *)dt_addr; 44 45 /* As libfdt use void *, we can't avoid this cast */ 46 const void *dtb = (void *)dt_addr; 47 48 /* Assert the node offset point to compatible property */ 49 node = fdt_node_offset_by_compatible(dtb, -1, compatible_str); 50 if (node < 0) { 51 ERROR("SOCFPGA: Can't find `%s` compatible in dtb\n", 52 compatible_str); 53 return node; 54 } 55 56 NOTICE("SOCFPGA: Successfully open and check FDT\n"); 57 58 return ret; 59 } 60 61 int socfpga_dt_populate_gicv3_config(uintptr_t dt_addr, gicv3_driver_data_t *plat_driver_data) 62 { 63 int err; 64 int node; 65 uintptr_t addr; 66 67 /* Necessary to work with libfdt APIs */ 68 const void *hw_config_dtb = (const void *)dt_addr; 69 /* 70 * Find the offset of the node containing "arm,gic-v3" compatible property. 71 * Populating fconf strucutures dynamically is not supported for legacy 72 * systems which use GICv2 IP. Simply skip extracting GIC properties. 73 */ 74 node = fdt_node_offset_by_compatible(hw_config_dtb, -1, "arm,gic-v3"); 75 if (node < 0) { 76 ERROR("SOCFPGA: Unable to locate node with arm,gic-v3 compatible property\n"); 77 return 0; 78 } 79 /* The GICv3 DT binding holds at least two address/size pairs, 80 * the first describing the distributor, the second the redistributors. 81 * See: bindings/interrupt-controller/arm,gic-v3.yaml 82 */ 83 err = fdt_get_reg_props_by_index(hw_config_dtb, node, 0, &addr, NULL); 84 if (err < 0) { 85 ERROR("SOCFPGA: Failed to read GICD reg property of GIC node\n"); 86 } else { 87 plat_driver_data->gicd_base = addr; 88 } 89 90 err = fdt_get_reg_props_by_index(hw_config_dtb, node, 1, &addr, NULL); 91 if (err < 0) { 92 ERROR("SOCFPGA: Failed to read GICR reg property of GIC node\n"); 93 } else { 94 plat_driver_data->gicr_base = addr; 95 } 96 return err; 97 } 98 99 int socfpga_dt_populate_dram_layout(uintptr_t dt_addr) 100 { 101 int node; 102 uintptr_t addr; 103 size_t size; 104 105 /* Necessary to work with libfdt APIs */ 106 const void *hw_config_dtb = (const void *)dt_addr; 107 108 /* Find 'memory' node */ 109 node = fdt_node_offset_by_prop_value(hw_config_dtb, -1, "device_type", 110 "memory", sizeof("memory")); 111 if (node < 0) { 112 NOTICE("SOCFPGA: Unable to locate 'memory' node\n"); 113 return node; 114 } 115 116 int err = fdt_get_reg_props_by_index( 117 hw_config_dtb, node, 0, 118 &addr, (size_t *)&size); 119 120 NOTICE("SOCFPGA: Mem base 0x%lx, Mem size 0x%lx\n", addr, size); 121 if (err < 0) { 122 ERROR("SOCFPGA: Failed to read 'reg' property of 'memory' node\n"); 123 return err; 124 } 125 126 return 0; 127 } 128