core: RebootToBootloader skeleton

core/embed/extmod/modtrezorutils/modtrezorutils.c

@@ -117,6 +117,19 @@ STATIC mp_obj_t mod_trezorutils_halt(size_t n_args, const mp_obj_t *args) {
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_trezorutils_halt_obj, 0, 1,
                                            mod_trezorutils_halt);
 
+
+/// def reboot_to_bootloader() -> None:
+///     """
+///     Reboots to bootloader.
+///     """
+STATIC mp_obj_t mod_trezorutils_reboot_to_bootloader() {
+  // actual reboot via trezorhal goes here:
+  ensure(secfalse, "reboot_to_bootloader");
+  return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(mod_trezorutils_reboot_to_bootloader_obj,
+                                 mod_trezorutils_reboot_to_bootloader);
+
 STATIC mp_obj_str_t mod_trezorutils_revision_obj = {
     {&mp_type_bytes}, 0, sizeof(SCM_REVISION) - 1, (const byte *)SCM_REVISION};
 
@@ -136,6 +149,7 @@ STATIC const mp_rom_map_elem_t mp_module_trezorutils_globals_table[] = {
     {MP_ROM_QSTR(MP_QSTR_consteq), MP_ROM_PTR(&mod_trezorutils_consteq_obj)},
     {MP_ROM_QSTR(MP_QSTR_memcpy), MP_ROM_PTR(&mod_trezorutils_memcpy_obj)},
     {MP_ROM_QSTR(MP_QSTR_halt), MP_ROM_PTR(&mod_trezorutils_halt_obj)},
+    {MP_ROM_QSTR(MP_QSTR_reboot_to_bootloader), MP_ROM_PTR(&mod_trezorutils_reboot_to_bootloader_obj)},
     // various built-in constants
     {MP_ROM_QSTR(MP_QSTR_SCM_REVISION),
      MP_ROM_PTR(&mod_trezorutils_revision_obj)},

core/mocks/generated/trezorutils.pyi

@@ -40,6 +40,13 @@ def halt(msg: str | None = None) -> None:
     """
     Halts execution.
     """
+
+
+# extmod/modtrezorutils/modtrezorutils.c
+def reboot_to_bootloader() -> None:
+    """
+    Reboots to bootloader.
+    """
 SCM_REVISION: bytes
 VERSION_MAJOR: int
 VERSION_MINOR: int

core/src/all_modules.py

@@ -366,6 +366,8 @@ apps.management.get_next_u2f_counter
 import apps.management.get_next_u2f_counter
 apps.management.get_nonce
 import apps.management.get_nonce
+apps.management.reboot_to_bootloader
+import apps.management.reboot_to_bootloader
 apps.management.recovery_device
 import apps.management.recovery_device
 apps.management.recovery_device.homescreen

core/src/apps/management/reboot_to_bootloader.py

@@ -0,0 +1,13 @@
+from typing import TYPE_CHECKING
+
+from trezor import utils, wire
+from trezor.messages import RebootToBootloader, Success
+
+if TYPE_CHECKING:
+    from typing import NoReturn
+
+
+async def reboot_to_bootloader(ctx: wire.Context, msg: RebootToBootloader) -> NoReturn:
+    await ctx.write(Success())
+    utils.reboot_to_bootloader()
+    raise RuntimeError

core/src/apps/workflow_handlers.py

@@ -49,6 +49,8 @@ def find_message_handler_module(msg_type: int) -> str:
         return "apps.management.change_wipe_code"
     elif msg_type == MessageType.GetNonce:
         return "apps.management.get_nonce"
+    elif msg_type == MessageType.RebootToBootloader:
+        return "apps.management.reboot_to_bootloader"
 
     if utils.MODEL == "T" and msg_type == MessageType.SdProtect:
         return "apps.management.sd_protect"

core/src/trezor/utils.py

@@ -11,6 +11,7 @@ from trezorutils import (  # noqa: F401
     consteq,
     halt,
     memcpy,
+    reboot_to_bootloader,
 )
 from typing import TYPE_CHECKING