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2 | ------------------------------------------------------------------------- | |
3 | Release Notes for Linux on Intel's IXP2000 Network Processor | |
4 | ||
5 | Maintained by Deepak Saxena <dsaxena@plexity.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 | ||
0ea6e611 | 17 | http://developer.intel.com |
1da177e4 LT |
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 |