Based on kernel version 2.6.26. Page generated on 2008-07-16 21:12 EST.
1 2 ------------------------------------------------------------------------- 3 Release Notes for Linux on Intel's IXP2000 Network Processor 4 5 Maintained by Deepak Saxena <dsaxena[AT]plexity[DOT]net> 6 ------------------------------------------------------------------------- 7 8 1. Overview 9 10 Intel's IXP2000 family of NPUs (IXP2400, IXP2800, IXP2850) is designed 11 for high-performance network applications such high-availability 12 telecom systems. In addition to an XScale core, it contains up to 8 13 "MicroEngines" that run special code, several high-end networking 14 interfaces (UTOPIA, SPI, etc), a PCI host bridge, one serial port, 15 flash interface, and some other odds and ends. For more information, see: 16 17 http://developer.intel.com/design/network/products/npfamily/ixp2xxx.htm 18 19 2. Linux Support 20 21 Linux 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 29 That is about all we can support under Linux ATM b/c the core networking 30 components of the chip are accessed via Intel's closed source SDK. 31 Please contact Intel directly on issues with using those. There is 32 also a mailing list run by some folks at Princeton University that might 33 be of help: https://lists.cs.princeton.edu/mailman/listinfo/ixp2xxx 34 35 WHATEVER YOU DO, DO NOT POST EMAIL TO THE LINUX-ARM OR LINUX-ARM-KERNEL 36 MAILING LISTS REGARDING THE INTEL SDK. 37 38 3. 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 46 4. 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 58 5. Thanks 59 60 The IXP2000 work has been funded by Intel Corp. and MontaVista Software, Inc. 61 62 The following people have contributed patches/comments/etc: 63 64 Naeem F. Afzal 65 Lennert Buytenhek 66 Jeffrey Daly 67 68 ------------------------------------------------------------------------- 69 Last Update: 8/09/2004