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3 Release Notes for Linux on Intel's IXP2000 Network Processor
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5 Maintained by Deepak Saxena <dsaxena@plexity.net>
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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:
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17 http://developer.intel.com/design/network/products/npfamily/ixp2xxx.htm
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19 2. Linux Support
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21 Linux currently supports the following features on the IXP2000 NPUs:
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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
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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.
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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.
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62 The following people have contributed patches/comments/etc:
63
64 Naeem F. Afzal
65 Lennert Buytenhek
66 Jeffrey Daly
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69 Last Update: 8/09/2004
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