1 2------------------------------------------------------------------------- 3Release Notes for Linux on Intel's IXP2000 Network Processor 4 5Maintained by Deepak Saxena <dsaxena@plexity.net> 6------------------------------------------------------------------------- 7 81. Overview 9 10Intel's IXP2000 family of NPUs (IXP2400, IXP2800, IXP2850) is designed 11for high-performance network applications such high-availability 12telecom systems. In addition to an XScale core, it contains up to 8 13"MicroEngines" that run special code, several high-end networking 14interfaces (UTOPIA, SPI, etc), a PCI host bridge, one serial port, 15flash interface, and some other odds and ends. For more information, see: 16 17http://developer.intel.com 18 192. Linux Support 20 21Linux currently supports the following features on the IXP2000 NPUs: 22 23- On-chip serial 24- PCI 25- Flash (MTD/JFFS2) 26- I2C through GPIO 27- Timers (watchdog, OS) 28 29That is about all we can support under Linux ATM b/c the core networking 30components of the chip are accessed via Intel's closed source SDK. 31Please contact Intel directly on issues with using those. There is 32also a mailing list run by some folks at Princeton University that might 33be of help: https://lists.cs.princeton.edu/mailman/listinfo/ixp2xxx 34 35WHATEVER YOU DO, DO NOT POST EMAIL TO THE LINUX-ARM OR LINUX-ARM-KERNEL 36MAILING LISTS REGARDING THE INTEL SDK. 37 383. Supported Platforms 39 40- Intel IXDP2400 Reference Platform 41- Intel IXDP2800 Reference Platform 42- Intel IXDP2401 Reference Platform 43- Intel IXDP2801 Reference Platform 44- RadiSys ENP-2611 45 464. Usage Notes 47 48- The IXP2000 platforms usually have rather complex PCI bus topologies 49 with large memory space requirements. In addition, b/c of the way the 50 Intel SDK is designed, devices are enumerated in a very specific 51 way. B/c of this this, we use "pci=firmware" option in the kernel 52 command line so that we do not re-enumerate the bus. 53 54- IXDP2x01 systems have variable clock tick rates that we cannot determine 55 via HW registers. The "ixdp2x01_clk=XXX" cmd line options allow you 56 to pass the clock rate to the board port. 57 585. Thanks 59 60The IXP2000 work has been funded by Intel Corp. and MontaVista Software, Inc. 61 62The following people have contributed patches/comments/etc: 63 64Naeem F. Afzal 65Lennert Buytenhek 66Jeffrey Daly 67 68------------------------------------------------------------------------- 69Last Update: 8/09/2004 70