ChanServ changed the topic of #asahi-dev to: Asahi Linux: porting Linux to Apple Silicon macs | Non-development talk: #asahi | General development | GitHub: https://alx.sh/g | Wiki: https://alx.sh/w | Logs: https://alx.sh/l/asahi-dev
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<nickchan>
mischa85: i never said that
<nickchan>
all i mean is disabling those power domains could possibly save power
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<nickchan>
but since ps-regs is not present no one really knows how to mess with power domains right now
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<sven>
see #asahi-re, i think cyc_ovrd just doesn't exist anymore on M4
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<chadmed>
latest passt seems to be broken with muvm again -.-
<sven>
mischa85_: also, I think m4 doesn't seem to require any chicken bits (or they're already set up in iboot before we get control)
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<sven>
mischa85_: (let's move back from -re): run m1n1 and write some code that prepare a timer interrupt or something, save all regs, set x1 to some magic value, run wfi, check if x1 still has that magic value, restore all regs or something like that
<sven>
if state is always retained than wfi won't ever enter deep sleep
<sven>
if state is sometimes retained then there's some HW heuristic that decides if wfi uses deeper sleep states
<sven>
if state is never retained it always uses deeper sleep states
<sven>
x1 should be fine, that reg is just allowed to be discarded across function calls
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<mischa85_>
on it!
<sven>
have you figured out how to start the other cores yet?
<mischa85_>
no, i could try to spin up the E-cores but they fail to do so, trying to do so on the P-cores just straight up crashes. that's why i set MAX_CPUS to 5