From: Kirill Tkhai <tkhai@yandex.ru>
To: sparclinux@vger.kernel.org
Subject: Re: Question about hibernation on sparc64
Date: Fri, 13 Apr 2012 09:55:33 +0000 [thread overview]
Message-ID: <498741334310934@web83.yandex.ru> (raw)
In-Reply-To: <80041334231315@web149.yandex.ru>
12.04.2012,š20:32,š"DavidšMiller"š<davem@davemloft.net>:
>šFrom:šKirillšTkhaiš<tkhai@yandex.ru>
>šDate:šThu,š12šAprš2012š15:48:35š+0400
>
>>ššSošIšwantštošaskšpeoplešwhošknowšsparc64šdeeply.šAreštherešany
>>ššarchitecturešlimitsšwhichšmakešhibernationšonšv9šimpossible?šMayšbe
>>ššanybodyšhasšresearchedšthisšquestion.
>
>šIšcan'tšthinkšofšanyšsparc64šhardwarešwhichšwouldšsupportšhibernation
>šinšanyšreasonablešway,šsošI'mšquitešsurprisedšthatšyoušplanšon
>šimplementingšsupportšforšit.ššPerhapsšyoušcanšelaboratešyouršplansš:-)
1)AsšIšseešinšCONFIG_HIBERNATIONšcomment:
"InšprinciplešitšdoesšnotšrequirešACPIšoršAPM,šalthoughšforšexamplešACPIšwillšbešusedšforšthešfinalšstepsšwhenšitšisšavailable".
Andšit'sšimplementedšonšplatformsšw/ošACPIšlikešMIPS.
Sošitšseemsštošmešthatšitšdoesn'tšrequirešspecialšhardwarešsupport,šbutšexceptionsšarešpossible..
2)Duringšthešsecondšbootšhibernationšdoesšthešnormalšbootš(itšinitializesšhardware in its normal way - standard initcalls).
The only exeption is "late_initcall(software_resume)" which resumes the memory, but it is executed after hardware is initialized.
---
We are talking about hibernation, it's different from "suspend to RAM" operation. "Suspend to RAM" requires hardware support.
Kirill
next prev parent reply other threads:[~2012-04-13 9:55 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-12 11:48 Question about hibernation on sparc64 Kirill Tkhai
2012-04-12 16:32 ` David Miller
2012-04-12 18:59 ` Alex Buell
2012-04-12 19:22 ` David Miller
2012-04-12 19:26 ` Sam Ravnborg
2012-04-12 23:04 ` Julian Calaby
2012-04-13 9:55 ` Kirill Tkhai [this message]
2012-04-13 14:50 ` David Miller
2012-04-16 20:11 ` Tom Callaway
2012-04-16 20:25 ` Sam Ravnborg
2012-10-28 15:21 ` marxdenl
2012-10-28 22:47 ` Kirill Tkhai
2012-10-29 9:44 ` marxdenl
2012-10-29 9:44 ` marxdenl
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