I'm looking to emulate a 6502 on the ARM but I would like to make it cycle accurate so I need some way to interface to an external clock. I can't rely on an internal clock as there are external components that will rely on the external clock as well and…

Hello,

I want to write a bit-banging driver for a Raspberry Pi 3 (Cortex A53 with 4 cores).
For testing I developed a simple Linux kernel mode driver which toggles a GPIO pin with approx. 1Mhz.
In order to get no interference by the Linux kernel I disabled…