1 /* 2 * Copyright (c) 2019-2020, 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 TB_FW, SOC_FW, TOS_FW, NS_fw and HW configs */ 16 #define MAX_DTB_INFO U(5) 17 18 static struct dyn_cfg_dtb_info_t dtb_infos[MAX_DTB_INFO]; 19 static OBJECT_POOL_ARRAY(dtb_info_pool, dtb_infos); 20 21 struct dyn_cfg_dtb_info_t *dyn_cfg_dtb_info_getter(unsigned int config_id) 22 { 23 unsigned int index; 24 struct dyn_cfg_dtb_info_t *info; 25 26 /* Positions index to the proper config-id */ 27 for (index = 0; index < MAX_DTB_INFO; index++) { 28 if (dtb_infos[index].config_id == config_id) { 29 info = &dtb_infos[index]; 30 break; 31 } 32 } 33 34 if (index == MAX_DTB_INFO) { 35 WARN("FCONF: Invalid config id %u\n", config_id); 36 info = NULL; 37 } 38 39 return info; 40 } 41 42 int fconf_populate_dtb_registry(uintptr_t config) 43 { 44 int rc; 45 int node, child; 46 struct dyn_cfg_dtb_info_t *dtb_info; 47 48 /* As libfdt use void *, we can't avoid this cast */ 49 const void *dtb = (void *)config; 50 51 /* Find the node offset point to "arm,dyn_cfg-dtb_registry" compatible property */ 52 const char *compatible_str = "arm,dyn_cfg-dtb_registry"; 53 node = fdt_node_offset_by_compatible(dtb, -1, compatible_str); 54 if (node < 0) { 55 ERROR("FCONF: Can't find %s compatible in dtb\n", compatible_str); 56 return node; 57 } 58 59 fdt_for_each_subnode(child, dtb, node) { 60 dtb_info = pool_alloc(&dtb_info_pool); 61 62 /* Read configuration dtb information */ 63 rc = fdtw_read_cells(dtb, child, "load-address", 2, &dtb_info->config_addr); 64 if (rc < 0) { 65 ERROR("FCONF: Incomplete configuration property in dtb-registry.\n"); 66 return rc; 67 } 68 69 rc = fdtw_read_cells(dtb, child, "max-size", 1, &dtb_info->config_max_size); 70 if (rc < 0) { 71 ERROR("FCONF: Incomplete configuration property in dtb-registry.\n"); 72 return rc; 73 } 74 75 rc = fdtw_read_cells(dtb, child, "id", 1, &dtb_info->config_id); 76 if (rc < 0) { 77 ERROR("FCONF: Incomplete configuration property in dtb-registry.\n"); 78 return rc; 79 } 80 81 VERBOSE("FCONF: dyn_cfg.dtb_registry cell found with:\n"); 82 VERBOSE("\tload-address = %lx\n", dtb_info->config_addr); 83 VERBOSE("\tmax-size = 0x%zx\n", dtb_info->config_max_size); 84 VERBOSE("\tconfig-id = %u\n", dtb_info->config_id); 85 } 86 87 if ((child < 0) && (child != -FDT_ERR_NOTFOUND)) { 88 ERROR("%d: fdt_for_each_subnode(): %d\n", __LINE__, node); 89 return child; 90 } 91 92 return 0; 93 } 94 95 FCONF_REGISTER_POPULATOR(dyn_cfg, fconf_populate_dtb_registry); 96