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

From: Blue Swirl
Subject: [Qemu-devel] Re: Some patches for qemu on sparc
Date: Tue, 14 Feb 2006 21:04:51 +0100

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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