The hwinfo section contains trees describing the
various hardware devices on the board.
The general hierarchy for devices is:
/hw/bus/devclass/device
where:
- hw
- the root of the hardware tree.
- bus
- the bus the hardware is on (pci, eisa, etc.).
- devclass
- the general class of the device (serial, rtc, etc.).
- device
- the actual chip implementing the device (8250, mc146818, etc.).