Device trees

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.).