Merge pull request #4684 from deepikabhavnani/thread_stack_issue ...

Add thread terminate hook

Merge pull request #5094 from deepikabhavnani/m23_armc6 ...

ARMC6 support for Cortex-M23

Replaced older version of assembly file with 2016-2017 version from RTX

Added thread terminate hook ...

Hook was added in RTX4 code to assist test framework to log thread info on
thread terminate, which was not working with RTX5.

mbed_rtx_idle: uVisor: Don't attempt to sleep ...

When uVisor is enabled, don't attempt to sleep. Attempting to sleep will
fail, as per <https://github.com/ARMmbed/uvisor/issues/420>.

ARMC6 support for Cortex-M23

Merge pull request #4949 from theotherjimmy/feature-armc5+armc6 ...

NEW TOOLCHAIN: Add the ARMC6 Compiler

Update mbed OS to handle ARMC6 requirements

Initial RTX and tools support for Cortex M-23/M-33 devices

Merge pull request #4938 from deepikabhavnani/IAR_fixes ...

Update IAR to version 8

Add tickless support for devices without SysTick ...

Some Cortex-M0 devices, such as the nrf51, don't have the SysTick.
Instead, these targets use a software interrupt to simulate SysTick.
Add the hooks in the tickless code to support these devices. Targets
which do not have SysTick should now define NO_SYSTICK in targets.json
and implement mbed_get_m0_tick_irqn to add os suport.

This patch also removes os tick handling from the existing devices
(nrf51) since this is now handled in common code.

Add initial support for tickless RTX ...

Add support for tickless by replacing RTX's SysTick timer code with
with code which uses an mbed timer along with suspending and
resuming the kernel in the idle loop. Tickless is enabled on a
per-target basis by defining the macro MBED_TICKLESS.

Merge pull request #4912 from 0xc0170/dev_sleep_drivers ...

Add sleep manager API

idle loop: add deepsleep locks ...

For backward compability, we invoke just sleep mode. Adding critical section to complete
lock/unlock deepsleep section.

__IAR_SYSTEMS_ICC__ macro had issues when 7.5 and 8.11 both workbench are installed

Added new locking init requirement for v8.x ...

The application must call void __iar_Initlocks(void); before any
lock is used.

Use correct IAR toolchain macro

_MAX_LOCK define is moved to DLib_Threads.h

Remove use of internal RTX types ...

Make calls to cmsis-os to get thread state, stack size, and max stack
usage rather than accessing internal RTX data directly. Wrap RTX5
specific code in OS_BACKEND_RTX5.

Also refactor the code to use mbed types rather than RTX types:
os_timer_t -> mbed_rtos_storage_timer_t
os_event_flags_t -> mbed_rtos_storage_event_flags_t
osRtxMutex_t -> mbed_rtos_storage_thread_t

Move Cortex specific RTX behind TARGET_CORTEX ...

Update directory structure to include RTX for only cortex targets, and
for all cortex targets. This patch accomplishes this by moving mbed-os
specific RTX files and RTX itself into rtos/TARGET_CORTEX along with
removing TARGET_CORTEX_M from the RTX5 directory.

The old directory structure:

rtos/rtx5/<mbed-os specific RTX files>
rtos/rtx5/TARGET_CORTEX_M/*
rtos/rtx4/*
rtos/<mbed-os specific RTX files>

Is re-arranged to:

rtos/TARGET_CORTEX/rtx5/*
rtos/TARGET_CORTEX/rtx4/*
rtos/TARGET_CORTEX/<mbed-os specific rtx files>

This both encapsulates RTX code more cleanly and makes it easier to
experiment with non-cortex cmsis-os2 backends, such as a posix
based cmsis-os2 backend.

Note - A potentially better name for the CORTEX_M directory would be
something like FEATURE_RTX5 since this directory only contains RTX5
related files. This cannot be done because there is not an easy way
to turn this feature on, since it cannot be done from mbed_lib.json.

Merge pull request #4941 from mprse/fix_mem_pool_header_file ...

Update of MemoryPool.h header file.

Fix pool buffer size, update free() description, add assertion in MemoryPool.h header file. ...

Provide fix for pool buffer size: pool block size must be
a multiple of 4 bytes.
Add assertion to forbid creation of MemoryPool object with queue size equal to 0.
Update description of free() function. Add information about
statuses returned by this function.

RTOS: Changes to the EvenFlags API, doxy and tests

RTOS: Add EventFlags class ...

EventFlags class is a wrapper for Event Flag functionality introduced in
RTOS2/RTX5.

Merge pull request #4817 from c1728p9/move_rtx_handlers ...

Move RTX error handlers into RTX handler file

Merge pull request #4752 from bulislaw/queue_tests ...

RTOS: Queue tests & docs rework

Move RTX error handlers into RTX handler file ...

Move the RTX error handlers out of mbed_retarget.cpp and into an the
dedicated RTX handler file.

Merge pull request #4729 from bulislaw/mutex_tests ...

RTOS: Mutex: Rework tests

Boot: Provide dynamic mutexes for ARM toolchain ...

ARM toolchain requires variable number of dynamic mutexes. We use combination of
RTX mutex pool and heap allocation to achieve that.

Merge pull request #4682 from bulislaw/sem_tests ...

Test: RTOS: Semaphore: Rework tests