Date: Fri, 13 Jul 2007 08:29:04 -0700 From: Nate Lawson <nate@root.org> To: Ian Smith <smithi@nimnet.asn.au> Cc: acpi@freebsd.org Subject: Re: ACPI summary available Message-ID: <46979A40.8040909@root.org> In-Reply-To: <Pine.BSF.3.96.1070713223841.20558C-100000@gaia.nimnet.asn.au> References: <Pine.BSF.3.96.1070713223841.20558C-100000@gaia.nimnet.asn.au>
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Ian Smith wrote: > On Thu, 12 Jul 2007, Nate Lawson wrote: > > Kevin Oberman wrote: > > > Thanks to a note on /., I found what looks to be a very nice summary of > > > ACPI and its myriad of states (C, D, G, S, and P). While it does not go > > > into ASL, the ACPI tables, or things of that sort, it is probably a > > > good starting place for those interested in just what ACPI is all about. > > > It filled in some gaps (especially about D and lower C states) for me. > > > > > > One small request...I am far from an ACPI expert and there may be > > > serious flaws in the article that I am unaware of. If so, please let me > > > know so I don't recommend it more widely. IF it looks good, I plan to > > > post a message about it to mobile@. > > > > > > http://www.techarp.com/showarticle.aspx?artno=420 > > > > It's ok. It doesn't include much real knowledge such as the fact that > > S2 has seldom been observed on a real system. It includes very > > processor-rev specific stuff such as which P states are supported on > > which CPUs. The diagram leaves out the embedded controller completely. > > One forgets how much one didn't know before one knew all about that :) > > I found good background overview on lots of things I'd previously not > had a clue about, especially the multi-core speed stepping and such, > despite icky format and distracting ad bombardment .. > > Short of your shelf of books, deep specs and the code, can you suggest > any other useful online ACPI in-a-nutshell references for neophytes? Handbook http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/acpi-debug.html http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/acpi-overview.html Usenix paper http://www.usenix.org/events/usenix02/tech/freenix/full_papers/watanabe/watanabe_html/index.html -Nate
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