linux-kernel - Re: [rft] s2ram wakeup moves to .c, could fix few machines

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Date:	Fri, 8 Feb 2008 00:36:42 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Pavel Machek <pavel@....cz>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	kernel list <linux-kernel@...r.kernel.org>,
	Linux-pm mailing list <linux-pm@...ts.osdl.org>
Subject: Re: [rft] s2ram wakeup moves to .c, could fix few machines

On Friday, 8 of February 2008, Pavel Machek wrote:
> Hi!

Hi,

> > > > -	memcpy((void *)acpi_wakeup_address, &wakeup_start,
> > > > -	       &wakeup_end - &wakeup_start);
> > > > -	acpi_copy_wakeup_routine(acpi_wakeup_address);
> > > > +	memcpy((void *)acpi_realmode, &wakeup_code_start, 4*PAGE_SIZE);
> > > 
> > > Using a PAGE_SIZE multiplier here isn't a good thing...
> > 
> > Yes, I'll fix that in one of the next iterations.
> 
> Agreed.
> 
> > > > +	header = (struct wakeup_header *)(acpi_realmode + 0x3f00);
> > > 
> > > ... especially not with magic constants like this.
> > 
> > Yeah.  Pavel, what's at 0x3f00, btw?
> 
> struct wakeup_header.
> 
> I really need the entry point to be at offset 0, so that I can get
> pointers to my data. I could not figure out how to do it any other
> way. And if 0 is taken, I thought I'd put header at the end.

What does the number 0x3f00 follow from?

Rafael
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