PM3350-SW datasheet(63/224 Pages) PMC

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ELAN 8X10

PM3350 ELAN 8 X10

DATA SHEET

PMC-970109

ISSUE 3

8 PORT ETHERNET SWITCH

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND PMC-SIERRA, INC. CUSTOMERS ONLY

Boot Data

In addition to the signature, header and bootstrap firmware code, the boot image is

expected to contain configuration information such as the sizes of memory buffer pools,

buffer limits defined on a per-port basis, predetermined MAC addresses to be placed in

the routing tables, the location of external ELAN 8x10s, the MAC address and IP

address assigned to this ELAN 8x10, and so on. The boot image must also supply the

operating firmware that is required by the ELAN 8x10 for packet switching and

management. The general layout of the boot image is as shown below (note that the

memory addresses increase downwards):

Boot Image Signature

Boot Image Header

Boot Tag Space

Bootstrap Firmware Code

Auxiliary Configuration Information

Auxiliary Firmware Code

Kbytes

Master Operating Code

RTOS Firmware Code (optional)

UDP/IP Stack Firmware Code

(optional)

256

Kbytes

SNMP Agent/MIB Firmware Code

(optional)

As shown, the basic bootstrap code and the master switch operating firmware occupy

32 Kbytes of EPROM/EEPROM space; if an SNMP agent is required (with the

associated UDP/IP stack and RTOS firmware), then the boot image size requirements

rise to 256 Kbytes. Contact the factory for more information on the boot image, and the

means of creating one.

The bootstrap firmware code performs a brief self-test, testing external memory and

verifying the boot image checksum. The status of each stage of the self-test is output

as writes of binary codes to the (configurable) memory location at which the optional

LED register may be located. After the self-test completes, the ELAN 8x10 uses the

information read from the boot image to set up the fixed and dynamic data structures in

external and internal RAM, and then initiates normal operation.

PM3350-SW Datasheet(PDF) 63 Page - PMC-Sierra, Inc

PM3350-SW Datasheet(HTML) 63 Page - PMC-Sierra, Inc

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