Writing a Hardware Configuration File

If a device is non-self-identifying, the kernel might require a hardware configuration file for that device. If the driver is called xx, the hardware configuration file for the driver should be called xx.conf.

On the x86 platform, device information is now supplied by the booting system. Hardware configuration files should no longer be needed, even for non-self-identifying devices.

See the driver.conf(4), pseudo(4), sbus(4), scsi_free_consistent_buf(9F), and update_drv(1M) man pages for more information on hardware configuration files.

Arbitrary properties can be defined in hardware configuration files. Entries in the configuration file are in the form property=value, where property is the property name and value is its initial value. The configuration file approach enables devices to be configured by changing the property values.