Messages in this thread | | | Date | Mon, 14 Aug 2017 20:40:42 +0200 (CEST) | From | Stefan Wahren <> | Subject | Re: [PATCH] ARM: bcm2836: Send event when onlining other cores |
| |
Hi Eric,
> Stefan Wahren <stefan.wahren@i2se.com> hat am 14. August 2017 um 19:11 geschrieben: > > > Hi Florian, > > > Florian Fainelli <f.fainelli@gmail.com> hat am 14. August 2017 um 18:25 geschrieben: > > > > > > > > > > On 08/08/2017 04:04 AM, Phil Elwell wrote: > > > Secondary cores should enter a low-power idle state when waiting to > > > be started. The "wfe" instruction causes a core to wait until an event > > > or interrupt arrives before continuing to the next instruction, and > > > the "sev" instruction sends a wakeup event to the other cores. > > > > > > Add an "sev" (and a memory barrier) to bcm2836_boot_secondary, the > > > function that wakes the waiting cores during booting. This is required > > > if the secondary cores are sitting in "wfe", and harmless if not. > > > > Eric, should I just pick this up for the upcoming ARM SoC pull requests > > that I am preparing, or do you have more changes aside from the two tags > > I already merged? > > this patch depends on series "ARM: bcm2836: Move SMP startup code to arch/arm". > > I didn't had the time to test Phil's patch in all relevant cases. But i could at least prepare a branch with my changes with the acks.
i prepared the branches bcm2835-dt-next-v2 and bcm2835-soc-next.
Stefan
| |