Artesyn Embedded Technology ATCA-7540, Installation And Use Manual, Page: 316 / 324

IPMI Feature Set
316 ATCA-7540 Installation and Use (6806871A01A )
The f ail safe logic makes three attempts to boot the payload successfully. After three attempts,
the fail safe logic is automatically disabled and the boot bank is left in the original state (before
the payload was booted).
Payload software is able to detect when fail safe was activated during last boot. For details, see
Table 8-26 .
By default, fail safe logic is disabled.
9.14 Glue Logic FPGA Flash Selection
The ATCA-7540 blade provides redundant FPGA flashes for both manual and automatic crisis
recoveries.
The general concept is that there is always an active and a standby SPI flash device. The role of
these two devices can be reversed by the IPMC; for this to work, the IPMC has to drive the chip
select signals to the SPI flashes. The final decision about which of the two devices is active and
standby is made by the IPMC.
The IPMC needs to control the Glue Logic FPGA during power up. The FPGA Bank selection is
implemented such that swapping the SPI flashes is in effect.
Swapping FPGA banks is only possible with the following steps:
1. Swap the FPGA banks
2. Power-cycle the payload
The IPMI command Set/Get System Boot Options together with the parameter #96 can be
used to specify the FPGA boot bank from which the payload shall boot persistently. For details,
see
System Boot Options Commands on page 233 .
9.14.1 Boot Bank Sensor
The ATCA-7540 blade provides a Boot Bank Sensor illustrating from which FPGA bank the FPGA
has booted last. For details, see
Boot Bank Supervision Sensor on page 302 .