ons 2014-10-01 klockan 09:38 +0200 skrev Jorge: > You'll need to run an hypervisor to arbitre the access to shared > resources for the two OSs
Not really if all you want is to run a simple RTOS on one core, and not sharing any I/O resources. To do that basically all you need is to reserve the memory and CPU so the Linux kenel don't stomp on it. But yes, using a hypervisor like XEN gives you a more flexible separation and plenty of options and cleaner upgrade path to other hardware. Keep in mind that there is some vital shared resources like PLL, SDRAM, CPU cache and a bit more that will cause sideeffects on the RTOS from the concurrently running Linux part. Regarding using the OpenRISC(?) co-processor in later Allwinner CPUs then it looks like Allwinner is sitting tight on it's specifications and toolchain requirements, so using it is not really a viable option. The one seen in A31 looked like a plain OpenRISC one, but in A80 I am not so sure what it is, and the largest piece of code blob for it in the SDK seems to be encrypted for some strange reason. Regards Henrik -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
