Hi,

This patch expands shadow memory of guest BIOS.
Currently the shadow memory is 0xc0000 - 0xdffff.
It is used by VGA, gPXE, option ROM, but the size of these ROMs is
around 40k->64k, so the area is not enough.

This patch is:
- replace e820 table from 0xe0000 to 0xeb000.
- expand shadowr from 0xc0000-0xdffff to 0xc0000-0xe8fff.
- fix scan size of VGA BIOS.

after this patch, BIOS map is below.
 BIOS map:
  c0000-c8fff: VGA BIOS
  c9000-d57ff: Etherboot ROM
  d5800-e0fff: PCI Option ROMs
  e9000-e919c: SMBIOS tables
  f0000-fffff: Main BIOS

Signed-off-by: Akio Takebe <takebe_akio@jp.fujitsu.com>

Ref:
http://lists.xensource.com/archives/html/xen-devel/2008-12/msg00835.html

Best Regards,

Akio Takebe