On Sun, Aug 22, 2010 at 08:54:35AM +0200, Rudolf Marek wrote:
What about other CPUs?
Not sure what you mean here.
It depends on reset types. Maybe halting other cpus would be good idea.
Oh - reset on SMP. Good point. We'd need to find a reset mechanism that worked even on SMP.
BTW, I tried the cf9, kbd controller, and triple fault reset on qemu. Unfortunately, cf9 doesn't do anything, and the other two only soft reset the cpu. A soft reset just causes POST to get called again in an infinite loop.
Anyone know of a way to reliably hard reset qemu?
Btw what about HMA? Maybe you can simply link the post code to HMA. And win 64kb. Bonus is that it is reachable from real mode.
Boot loaders and OSes assume they can use the memory immiediately above 1Meg - the BIOS isn't allowed to reserve it.