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.h> 12 #include <libfdt.h> 13 #include <plat/common/platform.h> 14 #include <platform_def.h> 15 16 struct fconf_dtb_info_t fconf_dtb_info; 17 18 void fconf_load_config(void) 19 { 20 int err; 21 /* fconf FW_CONFIG and TB_FW_CONFIG are currently the same DTB */ 22 image_info_t arm_tb_fw_info = { 23 .h.type = (uint8_t)PARAM_IMAGE_BINARY, 24 .h.version = (uint8_t)VERSION_2, 25 .h.size = (uint16_t)sizeof(image_info_t), 26 .h.attr = 0, 27 .image_base = ARM_TB_FW_CONFIG_BASE, 28 .image_max_size = (uint32_t) 29 (ARM_TB_FW_CONFIG_LIMIT - ARM_TB_FW_CONFIG_BASE) 30 }; 31 32 VERBOSE("FCONF: Loading FW_CONFIG\n"); 33 err = load_auth_image(TB_FW_CONFIG_ID, &arm_tb_fw_info); 34 if (err != 0) { 35 /* Return if FW_CONFIG is not loaded */ 36 VERBOSE("FW_CONFIG not loaded, continuing without it\n"); 37 return; 38 } 39 40 /* At this point we know that a DTB is indeed available */ 41 fconf_dtb_info.base_addr = arm_tb_fw_info.image_base; 42 fconf_dtb_info.size = (size_t)arm_tb_fw_info.image_size; 43 44 #if !BL2_AT_EL3 45 image_desc_t *desc; 46 47 /* The BL2 ep_info arg0 is modified to point to FW_CONFIG */ 48 desc = bl1_plat_get_image_desc(BL2_IMAGE_ID); 49 assert(desc != NULL); 50 desc->ep_info.args.arg0 = arm_tb_fw_info.image_base; 51 #endif 52 53 INFO("FCONF: FW_CONFIG loaded at address = 0x%lx\n", arm_tb_fw_info.image_base); 54 } 55 56 void fconf_populate(const char *config_type, uintptr_t config) 57 { 58 assert(config != 0UL); 59 60 /* Check if the pointer to DTB is correct */ 61 if (fdt_check_header((void *)config) != 0) { 62 ERROR("FCONF: Invalid DTB file passed for %s\n", config_type); 63 panic(); 64 } 65 66 INFO("FCONF: Reading %s firmware configuration file from: 0x%lx\n", config_type, config); 67 68 /* Go through all registered populate functions */ 69 IMPORT_SYM(struct fconf_populator *, __FCONF_POPULATOR_START__, start); 70 IMPORT_SYM(struct fconf_populator *, __FCONF_POPULATOR_END__, end); 71 const struct fconf_populator *populator; 72 73 for (populator = start; populator != end; populator++) { 74 assert((populator->info != NULL) && (populator->populate != NULL)); 75 76 if (strcmp(populator->config_type, config_type) == 0) { 77 INFO("FCONF: Reading firmware configuration information for: %s\n", populator->info); 78 if (populator->populate(config) != 0) { 79 /* TODO: handle property miss */ 80 panic(); 81 } 82 } 83 } 84 85 /* save local pointer to the config dtb */ 86 fconf_dtb_info.base_addr = config; 87 } 88