The Hardware Driver Foundation \(HDF\) provides the following driver framework capabilities: driver loading, driver service management, and driver message mechanism. This unified driver architecture platform is designed to provide a more precise and efficient development environment, where you can perform one-time development and multi-system deployment.
## Driver Loading<a name="section68701942154319"></a>Both on-demand loading and sequential loading are supported.- On-demand loading Drivers can be loaded by default during the operating system \(OS\) startup or be loaded dynamically after the OS startup.- Sequential loading Drivers can be loaded based on their priorities during the OS startup.## Driver Service Management<a name="section12453133414412"></a>The HDF centrally manages driver services. You can directly obtain a specified driver service by using the API provided by the HDF.## Driver Message Mechanism<a name="section129410710451"></a>The HDF provides a unified driver message mechanism, which allows message interactions between user-level applications and kernel-level drivers.
