Ronald G Minnich wrote: > > I saw an example of switching in real mode in linux' sources (it looks > > pretty clear) and thouhgt it is possible to do the same under FreeBSD. > > The problem is I'm absolutely lost in FreeBSD's physical memory management > > implementation (page tables and directory and so on). > > That code is quite broken. You need to check out the ones I mentioned > earlier. All that the code does in the linux kernel is fail badly. > > Actually there used to be in freebsd some really nice code for popping > into real mode and back again. It was to support calling BIOS for certain > things.
It's still there. See the code in /sys/boot, in particular, the bios code in boot2 and boot 3. It isn't enough to do what he wants, though. He wants to effectively return to real mode and jump to a real mode boot strap loader, as if in the second stage of a boot manager, after the partition to boot has been selected (e.g. "Reboot to Linux", "Reboot to Windows", "Reboot to XXX"). I understand the desire now. It all depends on how much work he's willing to do. -- Terry To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
