When used with the "fs" option to chain.c32, we need to know our own
filesystem offset.  That means knowing if we used the MBR vs GPT
partition information, as well as if we ended up using the passed-in
information or not.

Resolve this by providing an explicit pointer to the current partition
offset.  Eventually this should be replaced by some kind of statfs()
call.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Add a feature to display fullscreen help via menu selection entry
(inspired by the Debian install disc menus.)

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Add a sector_shift field to the MDI rather than assuming 512-byte
sectors.  Fix memdiskfind to report size in bytes, not in sectors.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

We already had two MBZ fields reserved, so use one of them to expand
into a 64-bit LBA.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

It appears that there still are PXE stacks in the field which needs
the crutch of being pointed to the default gateway.  As such, put all
the IP information into a single memory structure and allow modules to
see it.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

The committee didn't like re-using 0xEE for this purpose and wants
0xED instead.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

My GPT-based protocol was modified by the UEFI and T13 committees (the
former responsible for the GPT format, the latter for EDD and
therefore for the disk-related part of the BIOS specification.)  This
is thus now on its way to become an official protocol, so change the
implementation to match.

This still needs testing, and the Syslinux core needs to be adjusted
to leverage the extended information.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

The usual RAID-1 ADV constraint...

Signed-off-by: Ferenc Wagner <wferi@niif.hu>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>