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Read and write RAM physical addresses from Linux user space

Ok, this is another trick I learned working on my project.

I’ve a QEMU arm machine and a simulation outside them. QEMU shares his RAM (in the future I’ll write about this) with the simulator so I want to unlock the simulation (that is waiting for a 1 at the address 0x0FF8000) writing the specified value on that address using an application in user space inside the VM.

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C++ library in a C application

This is the second part of the integration of a SystemC module into Qemu. SystemC is C++ so I’ve had lots of problems trying to link my library (that is a multiprocessor simulator written in SystemC) with Qemu, because this is written in pure C. Read the rest of this entry »