Re: [Qemu-devel] [ipxe-devel] Big real mode use in ipxe

2012-08-19 Thread Kevin O'Connor
On Sun, Aug 19, 2012 at 04:34:50PM +0100, Michael Brown wrote: > On Sunday 19 Aug 2012 16:07:05 Avi Kivity wrote: > > (and that seabios needs changes to either work in > > big real mode, or to put the processor back into big real mode after > > returning from a PMM service. > > If seabios switches

Re: [Qemu-devel] [ipxe-devel] Big real mode use in ipxe

2012-08-19 Thread Avi Kivity
On 08/19/2012 06:34 PM, Michael Brown wrote: > On Sunday 19 Aug 2012 16:07:05 Avi Kivity wrote: >> Which is exactly what happens here. My understanding of big real mode is >> that to achieve a segment limit != 0x, you must go into 32-bit >> protected mode, load a segment with a larger limit, a

Re: [Qemu-devel] [ipxe-devel] Big real mode use in ipxe

2012-08-19 Thread Michael Brown
On Sunday 19 Aug 2012 16:07:05 Avi Kivity wrote: > Which is exactly what happens here. My understanding of big real mode is > that to achieve a segment limit != 0x, you must go into 32-bit > protected mode, load a segment with a larger limit, and return into real > mode without touching the se