def tftp_update_bios(server=None, path=None):
    '''
    Update the BIOS firmware through TFTP.

    Args:
        server(str): The IP address or hostname of the TFTP server.

        path(str): The TFTP path and filename for the BIOS image.

    CLI Example:

    .. code-block:: bash

        salt '*' cimc.tftp_update_bios foo.bar.com HP-SL2.cap

    '''

    if not server:
        raise salt.exceptions.CommandExecutionError("The server name must be specified.")

    if not path:
        raise salt.exceptions.CommandExecutionError("The TFTP path must be specified.")

    dn = "sys/rack-unit-1/bios/fw-updatable"

    inconfig = """<firmwareUpdatable adminState='trigger' dn='sys/rack-unit-1/bios/fw-updatable'
    protocol='tftp' remoteServer='{0}' remotePath='{1}'
    type='blade-bios' />""".format(server, path)

    ret = __proxy__['cimc.set_config_modify'](dn, inconfig, False)

    return ret