[ixp1200] Question about Netwinder Linux kernel

Hello, I have successfully setup netwinder Linux kernel (2.3.99-pre3) on ixp1200ev system. Does anyone can tell me how the memory map goes? I mean which address does the kernel occupy (I install the kernel to 0xC0808000) and in which address I can use with the uengines. By the way, if anyone can tell me where I can find the detail document? Thanks! Zhangxi Tan Tsinghua University