-------------------------------------------------------------------------Release Notes for Linux on Intel's IXP2000 Network Processor Maintained by Deepak Saxena <dsaxena@plexity.net>------------------------------------------------------------------------- 1. Overview Intel's IXP2000 family of NPUs (IXP2400, IXP2800, IXP2850) is designedfor high-performance network applications such high-availabilitytelecom systems. In addition to an XScale core, it contains up to 8"MicroEngines" that run special code, several high-end networking interfaces (UTOPIA, SPI, etc), a PCI host bridge, one serial port,flash interface, and some other odds and ends. For more information, see: http://developer.intel.com/design/network/products/npfamily/ixp2xxx.htm 2. Linux Support Linux currently supports the following features on the IXP2000 NPUs: - On-chip serial- PCI- Flash (MTD/JFFS2)- I2C through GPIO- Timers (watchdog, OS) That is about all we can support under Linux ATM b/c the core networkingcomponents of the chip are accessed via Intel's closed source SDK. Please contact Intel directly on issues with using those. There isalso a mailing list run by some folks at Princeton University that mightbe of help:  https://lists.cs.princeton.edu/mailman/listinfo/ixp2xxx WHATEVER YOU DO, DO NOT POST EMAIL TO THE LINUX-ARM OR LINUX-ARM-KERNELMAILING LISTS REGARDING THE INTEL SDK. 3. Supported Platforms - Intel IXDP2400 Reference Platform- Intel IXDP2800 Reference Platform- Intel IXDP2401 Reference Platform- Intel IXDP2801 Reference Platform- RadiSys ENP-2611 4. Usage Notes - The IXP2000 platforms usually have rather complex PCI bus topologies  with large memory space requirements. In addition, b/c of the way the  Intel SDK is designed, devices are enumerated in a very specific  way. B/c of this this, we use "pci=firmware" option in the kernel  command line so that we do not re-enumerate the bus. - IXDP2x01 systems have variable clock tick rates that we cannot determine   via HW registers. The "ixdp2x01_clk=XXX" cmd line options allow you  to pass the clock rate to the board port. 5. Thanks The IXP2000 work has been funded by Intel Corp. and MontaVista Software, Inc. The following people have contributed patches/comments/etc: Naeem F. AfzalLennert BuytenhekJeffrey Daly -------------------------------------------------------------------------Last Update: 8/09/2004