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+--- Thread: Power up a 2nd core? (/showthread.php?tid=20148)
Power up a 2nd core? - WhiteHexagon - 01-01-2026
I can see a PRCM register for CPU1_PWR_CLAMP that looks relevant for powering up a 2nd core. But I cant find any info about this, and since it seems to be an 8 bit value I am very relucatant to hack it. Is it documented anywhere please? or in general the whole 2nd core startup would be useful. I can take a guess at some of the steps, but it would be nice to follow something official and not melt my chip
RE: Power up a 2nd core? - WhiteHexagon - 01-03-2026
I went with the following values, which I found as being used by the original allwinner code. No idea if this is still the best way, but it seems to work
const POWER_UP = [_]u8{0xFE, 0xF8, 0xE0, 0x80, 0x00};