diff options
| -rw-r--r-- | doc/openocd.texi | 8 | ||||
| -rw-r--r-- | src/flash/nor/efm32.c | 47 |
2 files changed, 52 insertions, 3 deletions
diff --git a/doc/openocd.texi b/doc/openocd.texi index 7e51c470..ec0e9268 100644 --- a/doc/openocd.texi +++ b/doc/openocd.texi @@ -5175,6 +5175,14 @@ autoconfigures itself. @example flash bank $_FLASHNAME efm32 0 0 0 0 $_TARGETNAME @end example +A special feature of efm32 controllers is that it is possible to completely disable the +debug interface by writing the correct values to the 'Debug Lock Word'. OpenOCD supports +this via the following command: +@example +efm32 debuglock num +@end example +The @var{num} parameter is a value shown by @command{flash banks}. +Note that in order for this command to take effect, the target needs to be reset. @emph{The current implementation is incomplete. Unprotecting flash pages is not supported.} @end deffn diff --git a/src/flash/nor/efm32.c b/src/flash/nor/efm32.c index 0c66d4db..ab543d61 100644 --- a/src/flash/nor/efm32.c +++ b/src/flash/nor/efm32.c @@ -25,9 +25,7 @@ * GNU General Public License for more details. * * * * You should have received a copy of the GNU General Public License * - * along with this program; if not, write to the * - * Free Software Foundation, Inc., * - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * + * along with this program. * ***************************************************************************/ #ifdef HAVE_CONFIG_H @@ -997,7 +995,50 @@ static int get_efm32x_info(struct flash_bank *bank, char *buf, int buf_size) return efm32x_decode_info(&info, buf, buf_size); } +COMMAND_HANDLER(efm32x_handle_debuglock_command) +{ + struct target *target = NULL; + + if (CMD_ARGC < 1) + return ERROR_COMMAND_SYNTAX_ERROR; + + struct flash_bank *bank; + int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank); + if (ERROR_OK != retval) + return retval; + + struct efm32x_flash_bank *efm32x_info = bank->driver_priv; + + target = bank->target; + + if (target->state != TARGET_HALTED) { + LOG_ERROR("Target not halted"); + return ERROR_TARGET_NOT_HALTED; + } + + uint32_t *ptr; + ptr = efm32x_info->lb_page + 127; + *ptr = 0; + + retval = efm32x_write_lock_data(bank); + if (ERROR_OK != retval) { + LOG_ERROR("Failed to write LB page"); + return retval; + } + + command_print(CMD_CTX, "efm32x debug interface locked, reset the device to apply"); + + return ERROR_OK; +} + static const struct command_registration efm32x_exec_command_handlers[] = { + { + .name = "debuglock", + .handler = efm32x_handle_debuglock_command, + .mode = COMMAND_EXEC, + .usage = "bank_id", + .help = "Lock the debug interface of the device.", + }, COMMAND_REGISTRATION_DONE }; |