[U-Boot] UBoot porting to cortex-m3 based SoC

[Shawn Jin]

Before starting the project I'd like to have some advices from the community
about the feasibility of porting U-Boot/ucLinux to a cortex-m3 based SoC
with limited resources (up to 512K flash, up to 64K SRAM). I limit my
questions to U-Boot only and will post similar ones to ucLinux mailing-list.
But it will be certainly appreciated if you can also share your experience
and thoughts on ucLinux.

1. How much is supported in terms of Cortex-M3 in U-Boot?

2. Is it possible to port u-boot (including ucLinux) to a SoC with such
limited resources? What's the minimum footprint of U-Boot across all the
processors/architectures it supports?

3. What's the best toolchain to compile U-Boot for Cortex-M3?

Thanks a lot,
-Shawn.