How do I do ACPI?

nexos · **Joined:** Tue Feb 18, 2020 3:29 pm **Posts:** 1071

Hello,
I want to be able to use ACPI in my OS. I have seen ACPICA and tried it, but it way too large and complex for what I want. So I was wondering, what is the best way to go about ACPI? I hear ACPI is very complex because of AML and that stuff. There are only three things I am interested and they are finding PCI IRQ routing, parsing SMP info, and powering down the computer. Any suggestions?
Thanks,
nexos

thewrongchristian · **Joined:** Tue Apr 03, 2018 2:44 am **Posts:** 402

nexos wrote:

Hello,
I want to be able to use ACPI in my OS. I have seen ACPICA and tried it, but it way too large and complex for what I want. So I was wondering, what is the best way to go about ACPI? I hear ACPI is very complex because of AML and that stuff.

ACPI looks like a beast, one of those "if that's the answer, WTF was the question?"

nexos wrote:

There are only three things I am interested and they are finding PCI IRQ routing, parsing SMP info, and powering down the computer. Any suggestions?
Thanks,
nexos

Disclaimer, I've not tried it, but @Korona has this project in their sig:

https://github.com/qword-os/lai

When I get to the point that I care about ACPI, it's on the list to investigate, so I'd be curious how you get on.

Octacone · **Joined:** Fri Aug 07, 2015 6:13 am **Posts:** 1134

I would recommend LAI, or some other homemade GitHub interpreter.
ACPICA is one big clusterfuck, I don't like it.
When you feel mature enough, write your own. You don't have to support everything, only the things that you'll be using.

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How do I do ACPI?

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