Yatharth Kochar | 3345a8d | 2016-09-12 16:08:41 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
dp-arm | fa3cf0b | 2017-05-03 09:38:09 +0100 | [diff] [blame] | 4 | * SPDX-License-Identifier: BSD-3-Clause |
Yatharth Kochar | 3345a8d | 2016-09-12 16:08:41 +0100 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #include <arch_helpers.h> |
| 8 | #include <assert.h> |
| 9 | #include <bl_common.h> |
| 10 | #include <desc_image_load.h> |
| 11 | |
| 12 | |
| 13 | extern bl_mem_params_node_t *bl_mem_params_desc_ptr; |
| 14 | extern unsigned int bl_mem_params_desc_num; |
| 15 | |
| 16 | static bl_load_info_t bl_load_info; |
| 17 | static bl_params_t next_bl_params; |
| 18 | |
| 19 | |
| 20 | /******************************************************************************* |
| 21 | * This function flushes the data structures so that they are visible |
| 22 | * in memory for the next BL image. |
| 23 | ******************************************************************************/ |
| 24 | void flush_bl_params_desc(void) |
| 25 | { |
Dan Handley | 09c97c9 | 2017-04-18 14:46:23 +0100 | [diff] [blame] | 26 | flush_dcache_range((uintptr_t)bl_mem_params_desc_ptr, |
Yatharth Kochar | 3345a8d | 2016-09-12 16:08:41 +0100 | [diff] [blame] | 27 | sizeof(*bl_mem_params_desc_ptr) * bl_mem_params_desc_num); |
Dan Handley | 09c97c9 | 2017-04-18 14:46:23 +0100 | [diff] [blame] | 28 | |
| 29 | flush_dcache_range((uintptr_t)&next_bl_params, |
| 30 | sizeof(next_bl_params)); |
Yatharth Kochar | 3345a8d | 2016-09-12 16:08:41 +0100 | [diff] [blame] | 31 | } |
| 32 | |
| 33 | /******************************************************************************* |
| 34 | * This function returns the index for given image_id, within the |
| 35 | * image descriptor array provided by bl_image_info_descs_ptr, if the |
| 36 | * image is found else it returns -1. |
| 37 | ******************************************************************************/ |
| 38 | int get_bl_params_node_index(unsigned int image_id) |
| 39 | { |
| 40 | int index; |
| 41 | assert(image_id != INVALID_IMAGE_ID); |
| 42 | |
| 43 | for (index = 0; index < bl_mem_params_desc_num; index++) { |
| 44 | if (bl_mem_params_desc_ptr[index].image_id == image_id) |
| 45 | return index; |
| 46 | } |
| 47 | |
| 48 | return -1; |
| 49 | } |
| 50 | |
| 51 | /******************************************************************************* |
| 52 | * This function returns the pointer to `bl_mem_params_node_t` object for |
| 53 | * given image_id, within the image descriptor array provided by |
| 54 | * bl_mem_params_desc_ptr, if the image is found else it returns NULL. |
| 55 | ******************************************************************************/ |
| 56 | bl_mem_params_node_t *get_bl_mem_params_node(unsigned int image_id) |
| 57 | { |
| 58 | int index; |
| 59 | assert(image_id != INVALID_IMAGE_ID); |
| 60 | |
| 61 | index = get_bl_params_node_index(image_id); |
| 62 | if (index >= 0) |
| 63 | return &bl_mem_params_desc_ptr[index]; |
| 64 | else |
| 65 | return NULL; |
| 66 | } |
| 67 | |
| 68 | /******************************************************************************* |
| 69 | * This function creates the list of loadable images, by populating and |
| 70 | * linking each `bl_load_info_node_t` type node, using the internal array |
| 71 | * of image descriptor provided by bl_mem_params_desc_ptr. It also populates |
| 72 | * and returns `bl_load_info_t` type structure that contains head of the list |
| 73 | * of loadable images. |
| 74 | ******************************************************************************/ |
| 75 | bl_load_info_t *get_bl_load_info_from_mem_params_desc(void) |
| 76 | { |
| 77 | int index = 0; |
| 78 | |
| 79 | /* If there is no image to start with, return NULL */ |
| 80 | if (!bl_mem_params_desc_num) |
| 81 | return NULL; |
| 82 | |
| 83 | /* Assign initial data structures */ |
| 84 | bl_load_info_node_t *bl_node_info = |
| 85 | &bl_mem_params_desc_ptr[index].load_node_mem; |
| 86 | bl_load_info.head = bl_node_info; |
| 87 | SET_PARAM_HEAD(&bl_load_info, PARAM_BL_LOAD_INFO, VERSION_2, 0); |
| 88 | |
| 89 | /* Go through the image descriptor array and create the list */ |
| 90 | for (; index < bl_mem_params_desc_num; index++) { |
| 91 | |
| 92 | /* Populate the image information */ |
| 93 | bl_node_info->image_id = bl_mem_params_desc_ptr[index].image_id; |
| 94 | bl_node_info->image_info = &bl_mem_params_desc_ptr[index].image_info; |
| 95 | |
| 96 | /* Link next image if present */ |
| 97 | if ((index + 1) < bl_mem_params_desc_num) { |
| 98 | /* Get the memory and link the next node */ |
| 99 | bl_node_info->next_load_info = |
| 100 | &bl_mem_params_desc_ptr[index + 1].load_node_mem; |
| 101 | bl_node_info = bl_node_info->next_load_info; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | return &bl_load_info; |
| 106 | } |
| 107 | |
| 108 | /******************************************************************************* |
| 109 | * This function creates the list of executable images, by populating and |
| 110 | * linking each `bl_params_node_t` type node, using the internal array of |
| 111 | * image descriptor provided by bl_mem_params_desc_ptr. It also populates |
| 112 | * and returns `bl_params_t` type structure that contains head of the list |
| 113 | * of executable images. |
| 114 | ******************************************************************************/ |
| 115 | bl_params_t *get_next_bl_params_from_mem_params_desc(void) |
| 116 | { |
| 117 | int count; |
| 118 | unsigned int img_id = 0; |
| 119 | int link_index = 0; |
| 120 | bl_params_node_t *bl_current_exec_node = NULL; |
| 121 | bl_params_node_t *bl_last_exec_node = NULL; |
| 122 | bl_mem_params_node_t *desc_ptr; |
| 123 | |
| 124 | /* If there is no image to start with, return NULL */ |
| 125 | if (!bl_mem_params_desc_num) |
| 126 | return NULL; |
| 127 | |
| 128 | /* Get the list HEAD */ |
| 129 | for (count = 0; count < bl_mem_params_desc_num; count++) { |
| 130 | |
| 131 | desc_ptr = &bl_mem_params_desc_ptr[count]; |
| 132 | |
| 133 | if ((EP_GET_EXE(desc_ptr->ep_info.h.attr) == EXECUTABLE) && |
| 134 | (EP_GET_FIRST_EXE(desc_ptr->ep_info.h.attr) == EP_FIRST_EXE)) { |
| 135 | next_bl_params.head = &desc_ptr->params_node_mem; |
| 136 | link_index = count; |
| 137 | break; |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | /* Make sure we have a HEAD node */ |
| 142 | assert(next_bl_params.head != NULL); |
| 143 | |
| 144 | /* Populate the HEAD information */ |
| 145 | SET_PARAM_HEAD(&next_bl_params, PARAM_BL_PARAMS, VERSION_2, 0); |
| 146 | |
| 147 | /* |
| 148 | * Go through the image descriptor array and create the list. |
| 149 | * This bounded loop is to make sure that we are not looping forever. |
| 150 | */ |
| 151 | for (count = 0 ; count < bl_mem_params_desc_num; count++) { |
| 152 | |
| 153 | desc_ptr = &bl_mem_params_desc_ptr[link_index]; |
| 154 | |
| 155 | /* Make sure the image is executable */ |
| 156 | assert(EP_GET_EXE(desc_ptr->ep_info.h.attr) == EXECUTABLE); |
| 157 | |
| 158 | /* Get the memory for current node */ |
| 159 | bl_current_exec_node = &desc_ptr->params_node_mem; |
| 160 | |
| 161 | /* Populate the image information */ |
| 162 | bl_current_exec_node->image_id = desc_ptr->image_id; |
| 163 | bl_current_exec_node->image_info = &desc_ptr->image_info; |
| 164 | bl_current_exec_node->ep_info = &desc_ptr->ep_info; |
| 165 | |
| 166 | if (bl_last_exec_node) { |
| 167 | /* Assert if loop detected */ |
| 168 | assert(bl_last_exec_node->next_params_info == NULL); |
| 169 | |
| 170 | /* Link the previous node to the current one */ |
| 171 | bl_last_exec_node->next_params_info = bl_current_exec_node; |
| 172 | } |
| 173 | |
| 174 | /* Update the last node */ |
| 175 | bl_last_exec_node = bl_current_exec_node; |
| 176 | |
| 177 | /* If no next hand-off image then break out */ |
| 178 | img_id = desc_ptr->next_handoff_image_id; |
| 179 | if (img_id == INVALID_IMAGE_ID) |
| 180 | break; |
| 181 | |
| 182 | /* Get the index for the next hand-off image */ |
| 183 | link_index = get_bl_params_node_index(img_id); |
| 184 | assert((link_index > 0) && |
| 185 | (link_index < bl_mem_params_desc_num)); |
| 186 | } |
| 187 | |
| 188 | /* Invalid image is expected to terminate the loop */ |
| 189 | assert(img_id == INVALID_IMAGE_ID); |
| 190 | |
Yatharth Kochar | 3345a8d | 2016-09-12 16:08:41 +0100 | [diff] [blame] | 191 | return &next_bl_params; |
| 192 | } |
Soby Mathew | 96a1c6b | 2018-01-15 14:45:33 +0000 | [diff] [blame] | 193 | |
| 194 | /******************************************************************************* |
| 195 | * This function populates the entry point information with the corresponding |
| 196 | * config file for all executable BL images described in bl_params. |
| 197 | ******************************************************************************/ |
| 198 | void populate_next_bl_params_config(bl_params_t *bl2_to_next_bl_params) |
| 199 | { |
| 200 | bl_params_node_t *params_node; |
| 201 | unsigned int fw_config_id; |
| 202 | uintptr_t hw_config_base = 0, fw_config_base; |
| 203 | bl_mem_params_node_t *mem_params; |
| 204 | |
Soby Mathew | cc36484 | 2018-02-21 01:16:39 +0000 | [diff] [blame] | 205 | assert(bl2_to_next_bl_params != NULL); |
Soby Mathew | 96a1c6b | 2018-01-15 14:45:33 +0000 | [diff] [blame] | 206 | |
| 207 | /* |
| 208 | * Get the `bl_mem_params_node_t` corresponding to HW_CONFIG |
| 209 | * if available. |
| 210 | */ |
| 211 | mem_params = get_bl_mem_params_node(HW_CONFIG_ID); |
| 212 | if (mem_params != NULL) |
| 213 | hw_config_base = mem_params->image_info.image_base; |
| 214 | |
| 215 | for (params_node = bl2_to_next_bl_params->head; params_node != NULL; |
| 216 | params_node = params_node->next_params_info) { |
| 217 | |
| 218 | fw_config_base = 0; |
| 219 | |
| 220 | switch (params_node->image_id) { |
| 221 | case BL31_IMAGE_ID: |
| 222 | fw_config_id = SOC_FW_CONFIG_ID; |
| 223 | break; |
| 224 | case BL32_IMAGE_ID: |
| 225 | fw_config_id = TOS_FW_CONFIG_ID; |
| 226 | break; |
| 227 | case BL33_IMAGE_ID: |
| 228 | fw_config_id = NT_FW_CONFIG_ID; |
| 229 | break; |
| 230 | default: |
| 231 | fw_config_id = INVALID_IMAGE_ID; |
| 232 | break; |
| 233 | } |
| 234 | |
| 235 | if (fw_config_id != INVALID_IMAGE_ID) { |
| 236 | mem_params = get_bl_mem_params_node(fw_config_id); |
| 237 | if (mem_params != NULL) |
| 238 | fw_config_base = mem_params->image_info.image_base; |
| 239 | } |
| 240 | |
| 241 | /* |
| 242 | * Pass hw and tb_fw config addresses to next images. NOTE - for |
| 243 | * EL3 runtime images (BL31 for AArch64 and BL32 for AArch32), |
| 244 | * arg0 is already used by generic code. |
| 245 | */ |
| 246 | if (params_node == bl2_to_next_bl_params->head) { |
| 247 | params_node->ep_info->args.arg1 = fw_config_base; |
| 248 | params_node->ep_info->args.arg2 = hw_config_base; |
| 249 | } else { |
| 250 | params_node->ep_info->args.arg0 = fw_config_base; |
| 251 | params_node->ep_info->args.arg1 = hw_config_base; |
| 252 | } |
| 253 | } |
| 254 | } |