Power; Sam Software; Imls Utility - Emerson AXP1620 Installation And Use Manual

Shelf Management Alarm Module
7.8
7.9
7.9.1
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Power

The SAM uses dual +12V power feeds, one from each PEM. Hot swap circuitry ensures correct
operation when a SAM is inserted into or removed from a live system.

SAM Software

The software that runs on the shelf manager is described in detail in the Pigeon Point Systems
IPM Sentry Shelf Manager User Guide, which provides an introduction to shelf management,
the shelf manager, and the shelf management mezzanine. Also available is the Pigeon Point
Systems IPM Sentry Shelf-External Interface Reference which describes the command line,
web, SNMP (Simple Network Management Protocol), and RMCP (Remote Management
Control Protocol) interfaces. Refer to
on these publications.

imls Utility

A utility called imls is available on the SAM. It can be used to list all firmware images present
in flash. Note that the Shelf Manager flash is divided into two banks. Each bank contains a set
of three separate firmware images:
U-Boot
RFS
Kernel images
When the rupgrade_tool utility is used to perform a reliable firmware upgrade operation on the
Shelf Manager, the flash bank that is currently not active is programmed with the new images,
the processor is reset, and the newly programmed flash bank is selected.
If the new firmware fails to load or execute properly, the Shelf Manager automatically resets and
reverts to the previous flash bank. Selection of the bank to be used for booting is not a
configurable option at run-time.
The following text shows sample output obtained by running imls at the Shelf Manager Linux
prompt. Note that the first three images listed reflect the currently active flash bank contents,
and the next set of three images is contained within the other flash bank.
# imls
/dev/mtdblock3:
Image Name: U-Boot 1.1.4 for shmm1500 board
Created: Fri Jun
Image Type: PowerPC Linux Firmware (uncompressed)
Data Size: 212992 Bytes = 208.00 kB = 0.20 MB
Load Address: 0xF0000000
Entry Point: 0x00000000
Appendix A, Related Documentation
6 14:51:44 2008
AXP1620 Installation and Use (6806800E23E)
Power
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