How to install Apple iOS on qemu

Qemu supports ARM (and many other platforms). So, what do I need (besides installation media) to install Apple iOS on qemu? Are there ways to create iOS image suitable for Qemu?

Update:

Apple A4 = Cortex-A8 + PowerVR SGX535
Apple A5 = Cortex-A9 MPCore + PowerVR SGX543MP2

Both Cortexes use ARM v7 instruction set which is supported by Qemu. The problem is that:

• iOS doesn't support any of video-cards that can be emulated by Qemu
• Qemu can't emulate PowerVR GPU.

QEMU does not emulate Apple A4/A5 architecture.