[GSOC 2016] HD Audio Emulation For Bhyve Status

[Alex Teaca]

Hi,

Here is the status with the features I have implemented so far.

 - set up the HDA controller as a PCI device in bhyve
 - design the layout of registers and implement the read and write access
to the registers
 - implement the CORB and RIRB mechanisms in order to get commands from
driver and respond back
 - add the hdac_codec module and implement the interface of communication
between the hda controller and codec
 - describe the hda codec parameters for each node (ROOT, FG and AUDIO
OUTPUT)
 - handle the GET_PARAMETER verb

At the moment there is only one widget: the Autio Output Widget and the hda
driver has disabled it because it does not find any Pin widget.

The plan is to add the Pin output widget and to continue with the streams
data in order to play some samples.

Thanks,
Alex