Support for Arm CPUs

Topics
	Arm Cortex-M3
	Arm Cortex-M33
	Arm Cortex-M4
	TrustZone for Arm Cortex-M
	This subsystem implements TrustZone support for Arm Cortex-M processors.

Files
file	arch/cpu/arm/arm-def.h
	Compiler and data type definitions for all ARM-based CPUs.

Detailed Description

Arm Cortex-M implementation of mutexes using the LDREX, STREX and DMB instructions.

Arm Cortex-M implementation of atomic operations using the LDREX, STREX and DMB instructions.