/* * mgmt-dfu.c * --------- * CLI code for looking at, jumping to or erasing the loaded firmware. * * Copyright (c) 2016, NORDUnet A/S All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * - Neither the name of the NORDUnet nor the names of its contributors may * be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "stm-init.h" #include "mgmt-cli.h" #include "stm-uart.h" #include "stm-flash.h" #include "mgmt-dfu.h" #include #define DFU_FIRMWARE_ADDR ((uint32_t) &CRYPTECH_FIRMWARE_START) #define DFU_FIRMWARE_END_ADDR ((uint32_t) &CRYPTECH_FIRMWARE_END) #define DFU_UPLOAD_CHUNK_SIZE 256 #define HARDWARE_EARLY_DFU_JUMP 0xBADABADA extern uint32_t update_crc(uint32_t crc, uint8_t *buf, int len); /* Linker symbols are strange in C. Make regular pointers for sanity. */ __IO uint32_t *dfu_control = &CRYPTECH_DFU_CONTROL; __IO uint32_t *dfu_firmware = &CRYPTECH_FIRMWARE_START; __IO uint32_t *dfu_firmware_end = &CRYPTECH_FIRMWARE_END; /* The first word in the firmware is an address to the stack (msp) */ __IO uint32_t *dfu_msp_ptr = &CRYPTECH_FIRMWARE_START; /* The second word in the firmware is a pointer to the code * (points at the Reset_Handler from the linker script). */ __IO uint32_t *dfu_code_ptr = &CRYPTECH_FIRMWARE_START + 1; static int cmd_dfu_dump(struct cli_def *cli, const char *command, char *argv[], int argc) { cli_print(cli, "First 256 bytes from DFU application address %p:\r\n", dfu_firmware); uart_send_hexdump(STM_UART_MGMT, (uint8_t *) dfu_firmware, 0, 0xff); uart_send_string2(STM_UART_MGMT, (char *) "\r\n\r\n"); return CLI_OK; } static int cmd_dfu_erase(struct cli_def *cli, const char *command, char *argv[], int argc) { int status; cli_print(cli, "Erasing flash sectors %i to %i (address %p to %p) - expect the CLI to crash now", stm_flash_sector_num((uint32_t) dfu_firmware), stm_flash_sector_num((uint32_t) dfu_firmware_end), dfu_firmware, dfu_firmware_end); if ((status = stm_flash_erase_sectors((uint32_t) dfu_firmware, (uint32_t) dfu_firmware_end)) != 0) { cli_print(cli, "Failed erasing flash sectors (%i)", status); } return CLI_OK; } static int cmd_dfu_jump(struct cli_def *cli, const char *command, char *argv[], int argc) { uint32_t i; /* Load first byte from the DFU_FIRMWARE_PTR to verify it contains an IVT before * jumping there. */ cli_print(cli, "Checking for application at %p", dfu_firmware); i = *dfu_msp_ptr & 0xFF000000; /* 'new_msp' is supposed to be a pointer to the new applications stack, it should * point either at RAM (0x20000000) or at the CCM memory (0x10000000). */ if (i == 0x20000000 || i == 0x10000000) { /* Set dfu_control to the magic value that will cause the us to jump to the * firmware from the CLI main() function after rebooting. */ *dfu_control = HARDWARE_EARLY_DFU_JUMP; cli_print(cli, "Making the leap"); HAL_NVIC_SystemReset(); while (1) { ; } } else { cli_print(cli, "No loaded application found at %p (read 0x%x)", dfu_firmware, (unsigned int) *dfu_msp_ptr); } return CLI_OK; } void configure_cli_dfu(struct cli_def *cli) { cli_command_root(dfu); cli_command_node(dfu, dump, "Show the first 256 bytes of the loaded firmware"); cli_command_node(dfu, jump, "Jump to the loaded firmware"); cli_command_node(dfu, erase, "Erase the firmware memory (will crash the CLI)"); } a> 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318