Jon, Yes, the earlier the better to starting incorporating the changes in Linux. Especially if you're interested in seeing this included in the kernel in 6 months time.
/Amit On Tue, Oct 12, 2010 at 3:57 PM, Jon Callan <jon.cal...@arm.com> wrote: > Amit, > > Yes, it does seem a little tight doesn't it? Bobby is who I'm working with on > this, btw. > > Maybe I could get the source code tidied and open it up in 2-3 weeks time? > Then we can all work on it together :-) > > Jon. > > -----Original Message----- > From: Amit Kucheria [mailto:amit.kuche...@linaro.org] > Sent: 12 October 2010 13:32 > To: Jon Callan > Cc: linaro-dev@lists.linaro.org > Subject: Re: Common ARM context save/restore code > > :) > > As you can see, if you make the source available somewhere, there is plenty > of people interested in dissecting it. > > Jon, if you start working on them in December, we'll almost certainly miss > the 2.6.38 merge window to get it integrated to mainline. > > /Amit > p.s. /me makes a note to talk to bo...@arm et al. regarding this. > > On 10 Oct 12, Jon Callan wrote: >> Well, my plan was to... er... post a message on linaro-dev and see happened! >> >> And yes, refactor as an ARM-common driver + SoC-specific stubs, that sounds >> about right. >> >> I plan to work on the Linux integration from 1st December. I have done some >> Linux kernel work before but I'm a little rusty. >> >> Jon. >> >> -----Original Message----- >> From: Amit Kucheria [mailto:amit.kuche...@linaro.org] >> Sent: 12 October 2010 12:04 >> To: Jon Callan >> Cc: linaro-dev@lists.linaro.org >> Subject: Re: Common ARM context save/restore code >> >> Jon, >> >> I'm sure you anticipated this - What is your plan for pushing this out >> to the kernel? :) >> >> And how can we help? >> >> On Tue, Oct 12, 2010 at 1:39 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. >> >> So you need to refactor these to an ARM-common driver and SoC-specific stubs? >> >> /Amit >> >> -- 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. > > -- 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
