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Slimline Open Firmware - SLOF
Copyright (C) 2005, 2012 IBM Corporation
INSTALL ON JS20/JS21
===============================================================================
Detailed information about how to use SLOF on JS20 and JS21 can be found in
the document FlashingSLOF.pdf
The JS20 and JS21 blades both have 2 "flashsides". They have a 8MB flash part
which is divided into a 4MB "temporary" side and a 4MB "permanent" side.
The temporary side is the flashside used for the normal operation and the
permanent side is used as a backup if the temporary should ever fail.
Therefore it is important that the permanent flash side is not changed so
that if ever required the original firmware can be restored.
SLOF usually warns or in most cases does not easily allow to overwrite the
permanent side.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! !
! NOTE: WHEN FLASHING A NEW FIRMWARE IMAGE YOU MIGHT !
! DESTROY YOUR FIRMWARE IMAGE AND LOOSE YOUR WARRANTY! !
! !
! YOU MAY NEED TO CALL SERVICE, IF THE FIRMWARE IMAGE !
! IS DESTROYED ! !
! !
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
REMOVING SLOF FROM JS20/JS21
===============================================================================
If you want to boot the original firmware again, you need to boot the blade
from the management module. If auto-boot is enabled you have to press "s"
to reach the firmware prompt.
On the SLOF command line, type:
0 > other-firmware
and it should get you back to running the original firmware. To permanently
get it back, after booting Linux from there, type
$ update_flash -r
$ halt
You will boot on the PERM side. To boot from the TEMP side again, you need to
restart the Blade System MGMT Processor.
Following steps are needed on
Management Module -> Blade Tasks -> Power/Restart
Power Off Blade
Restart Blade System Mgmt Processor
Power On Blade
INSTALL ON KVM/QEMU
===============================================================================
Recent versions of QEMU should already be shipped with a version of SLOF.
To upgrade SLOF in your QEMU installation, back-up the old firmware file
.../share/qemu/slof.bin from your QEMU installation, then simply copy the
new SLOF image (for example "boot_rom.bin" after building board-qemu) to
this location.
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