[Qemu-devel] Re: Some patches for qemu on sparc

[Blue Swirl]

> Looks like there is no cpu_get_real_ticks() function implementation for 
> sparc. There is an old message on qemu-devel discussing this issue [0].
> It looks like this function is fairly easy to implement by reading the
> %tick register in machines compliant with SPARC v9 architecture (Ultra1
> or better), however the implementation for v8 architecture (and we are 
> building binaries for v8 in Debian) does not look so simple. I'd appreciate 
> any opinions or hints on this matter.

Slavio timer can be programmed to free run (user profiler) and with suitable 
permissions, user programs can map the timer count register to their address 
space and read the timer count value. I don't know what Linux does in this 
respect.

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