Nico Weber bc213ad7a2 Kernel: Add a Timer class for aarch64 ...

For now, this can only query microseconds since boot.

Use this to print a timestamp every second. This busy-loops
until a second has passed. This might be a good first use of
interrupts soon.

qemu used to not implement this timer at some point, but
it seems to work fine even in qemu now (qemu v 5.2.0).

2021-10-02 21:23:28 +01:00

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