This filename conflicts with the 'mbedtls' package. They are renamed
in the name of the corresponding chips and included in 'board.h'.
Files that rely on this file should include 'board.h' instead.

Add cache invalidate and clean interfaces.
Adjust the default cache type of memory to 'WriteBach with WriteAllocate'.

* the initial support of synopsys designware arc processor
* the initial support of synospsy ARC EM Starter Kit
* the bsp code is based on embarc which is a common SDK for
all synopsys ARC-based boards
* use "scons --gdb" to debug emsk with em9d configuration
* for detailed board information, pls go embarc.org
Signed-off-by: NWayne Ren <wei.ren@synopsys.com>

* Add get_free_heap_size function;
* Increase shell stack for KPU module.

RT_WEAK void rt_hw_cpu_reset(void)