1 /* 2 * Copyright (c) 2019-2022, Arm Limited. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 9 #include <common/debug.h> 10 #include <common/fdt_wrappers.h> 11 #include <lib/fconf/fconf_dyn_cfg_getter.h> 12 #include <lib/object_pool.h> 13 #include <libfdt.h> 14 15 /* We currently use FW, TB_FW, SOC_FW, TOS_FW, NT_FW and HW configs */ 16 #define MAX_DTB_INFO U(6) 17 /* 18 * Compile time assert if FW_CONFIG_ID is 0 which is more 19 * unlikely as 0 is a valid image ID for FIP as per the current 20 * code but still to avoid code breakage in case of unlikely 21 * event when image IDs get changed. 22 */ 23 CASSERT(FW_CONFIG_ID != U(0), assert_invalid_fw_config_id); 24 25 static struct dyn_cfg_dtb_info_t dtb_infos[MAX_DTB_INFO]; 26 static OBJECT_POOL_ARRAY(dtb_info_pool, dtb_infos); 27 28 /* 29 * This function is used to alloc memory for config information from 30 * global pool and set the configuration information. 31 */ 32 void set_config_info(uintptr_t config_addr, uintptr_t ns_config_addr, 33 uint32_t config_max_size, 34 unsigned int config_id) 35 { 36 struct dyn_cfg_dtb_info_t *dtb_info; 37 38 dtb_info = pool_alloc(&dtb_info_pool); 39 dtb_info->config_addr = config_addr; 40 dtb_info->ns_config_addr = ns_config_addr; 41 dtb_info->config_max_size = config_max_size; 42 dtb_info->config_id = config_id; 43 } 44 45 /* Get index of the config_id image */ 46 unsigned int dyn_cfg_dtb_info_get_index(unsigned int config_id) 47 { 48 unsigned int index; 49 50 /* Positions index to the proper config-id */ 51 for (index = 0U; index < MAX_DTB_INFO; index++) { 52 if (dtb_infos[index].config_id == config_id) { 53 return index; 54 } 55 } 56 57 return FCONF_INVALID_IDX; 58 } 59 60 struct dyn_cfg_dtb_info_t *dyn_cfg_dtb_info_getter(unsigned int config_id) 61 { 62 /* Positions index to the proper config-id */ 63 unsigned int index = dyn_cfg_dtb_info_get_index(config_id); 64 65 if (index < MAX_DTB_INFO) { 66 return &dtb_infos[index]; 67 } 68 69 WARN("FCONF: Invalid config id %u\n", config_id); 70 71 return NULL; 72 } 73 74 int fconf_populate_dtb_registry(uintptr_t config) 75 { 76 int rc; 77 int node, child; 78 79 /* As libfdt use void *, we can't avoid this cast */ 80 const void *dtb = (void *)config; 81 82 /* 83 * In case of BL1, fw_config dtb information is already 84 * populated in global dtb_infos array by 'set_fw_config_info' 85 * function, Below check is present to avoid re-population of 86 * fw_config information. 87 * 88 * Other BLs, satisfy below check and populate fw_config information 89 * in global dtb_infos array. 90 */ 91 if (dtb_infos[0].config_id == 0U) { 92 uint32_t config_max_size = fdt_totalsize(dtb); 93 set_config_info(config, ~0UL, config_max_size, FW_CONFIG_ID); 94 } 95 96 /* Find the node offset point to "fconf,dyn_cfg-dtb_registry" compatible property */ 97 const char *compatible_str = "fconf,dyn_cfg-dtb_registry"; 98 node = fdt_node_offset_by_compatible(dtb, -1, compatible_str); 99 if (node < 0) { 100 ERROR("FCONF: Can't find %s compatible in dtb\n", compatible_str); 101 return node; 102 } 103 104 fdt_for_each_subnode(child, dtb, node) { 105 uint32_t config_max_size, config_id; 106 uintptr_t config_addr; 107 uintptr_t ns_config_addr = ~0UL; 108 uint64_t val64; 109 110 /* Read configuration dtb information */ 111 rc = fdt_read_uint64(dtb, child, "load-address", &val64); 112 if (rc < 0) { 113 ERROR("FCONF: Incomplete configuration property in dtb-registry.\n"); 114 return rc; 115 } 116 config_addr = (uintptr_t)val64; 117 118 rc = fdt_read_uint32(dtb, child, "max-size", &config_max_size); 119 if (rc < 0) { 120 ERROR("FCONF: Incomplete configuration property in dtb-registry.\n"); 121 return rc; 122 } 123 124 rc = fdt_read_uint32(dtb, child, "id", &config_id); 125 if (rc < 0) { 126 ERROR("FCONF: Incomplete configuration property in dtb-registry.\n"); 127 return rc; 128 } 129 130 VERBOSE("FCONF: dyn_cfg.dtb_registry cell found with:\n"); 131 VERBOSE("\tload-address = %lx\n", config_addr); 132 VERBOSE("\tmax-size = 0x%x\n", config_max_size); 133 VERBOSE("\tconfig-id = %u\n", config_id); 134 135 rc = fdt_read_uint64(dtb, child, "ns-load-address", &val64); 136 if (rc == 0) { 137 ns_config_addr = (uintptr_t)val64; 138 VERBOSE("\tns-load-address = %lx\n", ns_config_addr); 139 } 140 141 set_config_info(config_addr, ns_config_addr, config_max_size, 142 config_id); 143 } 144 145 if ((child < 0) && (child != -FDT_ERR_NOTFOUND)) { 146 ERROR("%d: fdt_for_each_subnode(): %d\n", __LINE__, node); 147 return child; 148 } 149 150 return 0; 151 } 152 153 FCONF_REGISTER_POPULATOR(FW_CONFIG, dyn_cfg, fconf_populate_dtb_registry); 154