All bits in the ICSR register in the cortexm system control block are
either read-only or don't have an effect when writing a zero. A
read-modify-write cycle is thus not required when writing bit flags in
the register. This commit removes the reads in the read-modify-store
patterns for this register.
Refactor and add multiply by word size to get the usage in number of
bytes instead of in number of words.
Verified implementation by manual memory inspection in GDB.
- removed coretx-m[0|3|4]
- moved their content to cortexm_common
- adjusted cortex Makefiles to this new name
- adjusted cortex Makefiles new structure
- fixes to cortexm-common
- Added ARM CMSIS headers to cortexm_common
- thread_exit fixes to cortexm-common
- cortexm-common adjusted documentation
- cortexm_common added eINT dINT defines for now
