System-level HW/SW co-simulation framework for multiprocessor and multithread SoC

C/C++-based languages such as SystemC or SpecC can be used for both hardware and software description by raising the level of abstraction for hardware. This paper proposes techniques for fast and accurate high-level co-simulation for multithread and multiprocessor SoC design using SystemC for hardware and legacy C with RTOS (real-time operating system) API for software. Automatically modified legacy C synchronizes with SystemC clock events, and communicates with other modules through IO (input/output) variables and transaction level bus models. Generic RTOS scheduler and POS1X APIs are also provided for the real-time application. About three times faster co-simulation speed than the ISS-based co-simulation along with various profiling data with 95% accuracy were achieved.