Initialization Entry Points

Initialization Entry Points

The kernel calls a driver to initialize itself at any of three different entry points, as follows:

pfxinit Initialize self-defining hardware or a pseudo-device.
pfxedtinit Initialize a hardware device based on VECTOR data.
pfxstart General initialization.

Each call has different abilities. A driver may define any combination of the three entry points. It is not uncommon to define both a pfxstart() and one of pfxedtinit() or pfxinit().

When Initialization Is Performed
Entry Point init()
Entry Point edtinit()
Entry Point start()

pfxinit	Initialize self-defining hardware or a pseudo-device.
pfxedtinit	Initialize a hardware device based on VECTOR data.
pfxstart	General initialization.