A friend sent this interesting information:
http://www.arm.com/products/processors/cortex-m/cortex-m1.php
The ARM Cortex™-M1 processor is the first ARM processor designed specifically for implementation in FPGAs. The Cortex-M1 processor targets all major FPGA devices and includes support for leading FPGA synthesis tools, allowing the designer to choose the optimal implementation for each project. The Cortex-M1 processor enables OEMs to achieve significant cost savings through rationalization of software and tools investments across multiple projects spanning FPGA, ASIC and ASSP, plus greater vendor independence through use of an industry-standard processor.