[Etherboot-developers] multi-NIC setup iBFT.

[Igor B. <Igo...@ok...>]

Michael,

I am trying to use gPXE in multi-NIC setup.
It could be multiple BootRoms of gPXE only,
or a mixed setup of gPXE ROMs and non-gPXE ROMs.
The issue is iSCSI boot and iBFT table.
At present, iBFT table is pre-allocated as
struct gpxe_ibft __data16 ( ibftab )
so no information filled by previously run BootRoms
is present. So if a previous ROM would establish an
iSCSI session but not boot from the target (keep_san
must be set too), then the next BootRom (gPXE)
would not use the same iBFT and start filling its own
iBFT from scratch.

There are two things I think I have to do:
1. Scan a range of physical addresses from 512K to 1M
     to locate iBFT.
2. convert the resulting physical addr
   to an addr which can be used in gPXE.

If no iBFT found,  I can use a pre-allocated one and start
filling it from scratch. But the next BootRom executed by
BIOS must be able to pick it up as described above.

I would really appreciate your advice on how to approach
1 and 2 in gPXE.

Thank you very much in advance.
Igor.

-- 
Igor V. Baryshev
OKTET Labs
http://www.oktetlabs.ru
Phone: +7 812 783 2191 Fax:+7 812 784 6591