Date: Mon, 19 Jun 2000 09:42:10 -0700 From: Mike Smith <msmith@freebsd.org> To: Warner Losh <imp@village.org> Cc: freebsd-current@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG Subject: Re: ACPI project progress report Message-ID: <200006191642.JAA08637@mass.osd.bsdi.com> In-Reply-To: Your message of "Mon, 19 Jun 2000 10:30:53 MDT." <200006191630.KAA60652@harmony.village.org>
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> In message <20000620003220R.iwasaki@jp.FreeBSD.org> Mitsuru IWASAKI writes: > : Maybe I'm wrong because of lack of my understanding on crush dump and > : loader. Please help us :-) > > I think that you might be able to do this. The real tricky part maybe > saving hardware RAM that the drivers expect to be there when you > wakeup. I thinking of video ram and the X server's font cache, to > name one example. S4 requires the OS to reinitialise peripherals. Some comments I've seen from the Linux folks suggest that we'll have to save and restore the PCI configuration space as well. Basically, resume from S4 is not something that is going to be very easy for us to implement. It'll require every S4-OK driver to re-initialise in the resume method. (Note that we will also need to add suspend-to and resume-from arguments to the relevant driver methods.) We also have a problem in that we'll need a separate suspend file for system memory, since we can't just up and use swap (which may already be busy). I would be inclined to start with some of the easier states first. 8) -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org \\ and he'll hate you for a lifetime. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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