[ixp1200] Where do I get microcode assembler?

Hello Until now, I only use StrongARM on IXP machine. Now, I want to use MicroEngines... But I don't find Microcode assember. I use IXP1200 Evaluation board and have SW development kit CDs. Whered do I get in-line microcode assember? 'In-line' means that assember operates at Linux machine. Please answer.. thanks!