Hi Jon, That is a nice follow up to the OMAP idle code clean up, cf. http://lists.linaro.org/pipermail/linaro-dev/2010-October/001084.html. It would be nice to see how the code is organized and the impact of integrating it into the kernel.
Regards, Jean On Tue, Oct 12, 2010 at 12:39 PM, Jon Callan <jon.cal...@arm.com> wrote: > Vishwa, > > I have a more-or-less complete set of example code for CPU context > save/restore, currently supporting A5/A8/A9 and with planned support for > Eagle. > > It is structured as "firmware" at the moment, but it would be much better if > it was integrated into the ARM Linux kernel. The idea is the kernel calls it > from CPUidle, and it saves all CPU context and cuts the power. Then when > power returns, it restores all CPU context and returns to the kernel as if > nothing has happened. > > It handles just the CPU and cluster context, which on A9mpcore includes MMU, > GIC, VFP, SCU, L2cc, Debug, etc. It takes care of cleaning caches and > entering/leaving the coherency domain. There is also support for TrustZone, > but as you say that's quite platform-specific. > > So we would need to integrate this with the SoC-specific code somehow. > > Jon. > -- > I work Tue/Wed/Fri only > Jon Callan, Staff Software Engineer, Processor Division > ARM Cambridge / +44 1223 400814 > > > -- IMPORTANT NOTICE: The contents of this email and any attachments are > confidential and may also be privileged. If you are not the intended > recipient, please notify the sender immediately and do not disclose the > contents to any other person, use it for any purpose, or store or copy the > information in any medium. Thank you. > > _______________________________________________ > linaro-dev mailing list > linaro-dev@lists.linaro.org > http://lists.linaro.org/mailman/listinfo/linaro-dev > _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
