# Linux Kernel Module Cheat

#### 33.11.1. Find the UART address

Enter the QEMU console:

    Ctrl-X C

Then do:

    info mtree

And look for `pl011`:

        0000000009000000-0000000009000fff (prio 0, i/o): pl011

On gem5, it is easy to find it on the source. We are using the machine `RealView_PBX`, and a quick grep leads us to: https://github.com/gem5/gem5/blob/a27ce59a39ec8fa20a3c4e9fa53e9b3db1199e91/src/dev/arm/RealView.py#L615

    class RealViewPBX(RealView):
        uart = Pl011(pio_addr=0x10009000, int_num=44)