Core(A): Fixed __FPU_Enable function not to mess registers. (#589) ...

- Enhanced function to use only two temporary registers.
- Added used registers to clobber list.

Change-Id: If7c9462ed4424781e40379fbe12a5e4e3257920f

CMSIS/CORTEX-M: Don't build mbed_tz_context.c in TF-M targets ...

- TF-M v8m secure-side implements their own TZ context APIs so need to avoid building the Mbed implementation.

(cherry picked from commit d3f7abd)

CMSIS/RTX: Patch to conditionally compile ...

tz_context.c should be compiled only for secure world,
definition of API's in tz_context.h should be part of secure
binary/bootloader when building mbed-os as non-secure

(Cherry picked from d0a43b8)

(cherry picked from commit fb35475)

CMSIS/RTX: Reintroduce arm_math.h ...

(cherry picked from commit 6a6e3ac)

[CMSIS_5]: Updated to ca812421

Move fault handlers to platform directory ...

Having them in cmsis causes grief when attempting to update CMSIS with
the importer script.

copyright 2019 fix

cmsis conf: change license to apache 2.0

CMSIS/CORTEX-M: Don't build mbed_tz_context.c in TF-M targets ...

- TF-M v8m secure-side implements their own TZ context APIs so need to avoid building the Mbed implementation.

Merge pull request #9167 from TomoYamanaka/hanlder_without_RTOS ...

Modify IRQ handler processing when unusing RTOS at Cortex-A

Merge pull request #9150 from kjbracey-arm/armc6_fpu ...

Check correct ARMC6 predefine for FP codegen

Modify IRQ handler processing without RTOS at Cortex-A IAR Compiler ...

In case of unusing RTOS, there is no processing against IRQ handler and it causes a linker error.
Therefore, I added this processing with WEAK attribute. Also I added cmain.S file at cmsis/TARGET_CORTEX_A folder.

Check correct ARMC6 predefine for FP codegen ...

For ARMC6, CMSIS headers were checking the `__ARM_PCS_VFP`, which
indicates hardfp ABI in use, when they need to check whether FP
code generation is enabled. Change this to `__ARM_FP`, so it
works for platforms using softfp ABI.

Change already present in CMSIS_5 repo, via commit
969822a, but redone with local
search-and-replace.

CM3: Make ACTLR bit definitions conditional ...

The ACTLR register itself is conditional on chip revision, but its
bit definitions were always defined.

Make the the bit definitions also conditional, so it is possible to
produce portable code that sets DISDEFWBUF if available:

    #ifdef SCnSCB_ACTLR_DISDEFWBUF_Msk
       SCnSCB->ACTLR |= SCnSCB_ACTLR_DISDEFWBUF_Msk;
    #endif

(cherry-picked from CMSIS b2b04db)

mbed_fault_handler: fix build warning ...

Fixes warning

BUILD\NRF52840_DK\GCC_ARM\mbed-os\cmsis\TARGET_CORTEX_M\mbed_fault_handler.o
.\mbed-os\cmsis\TARGET_CORTEX_M\mbed_fault_handler.c
[Warning] mbed_fault_handler.c@149,5: implicit declaration
of function 'memcpy' [-Wimplicit-function-declaration]

Change the reboot-max value semantics and code style and other fixes

Error and fault handling changes for crash reporting

Fault handler: fix printf format specifiers

Space optimization to fault handlers

Moving fault handlers under cmsis

Fix the CMSIS macro ARM_MPU_RASR ...

The update to CMSIS 5.4.0 broke the macro ARM_MPU_RASR. This patch
pulls in the upstream fix from CMSIS:
https://github.com/ARM-software/CMSIS_5/commit/2ead2adffbffcaaef62253733e5f9f41f215973d#diff-e4bfba5228373d368ac2543d6e5bd4d0

Fix CMSIS __RESTRICT define for IAR ...

Revert the define __RESTRICT from "__restrict" to "restrict". This
fixes compilation for IAR.

CMSIS/RTX: Patch to conditionally compile ...

tz_context.c should be compiled only for secure world,
definition of API's in tz_context.h should be part of secure
binary/bootloader when building mbed-os as non-secure

(Cherry picked from d0a43b8)

CMSIS/RTX: Reintroduce arm_math.h ...

(cherry picked from commit 6a6e3ac)

[CMSIS_5]: Updated to 0b521765

Remove uVisor from mbed-os

Add volatile modifier for CP15 accessors ...

Add volatile modifier to prevent ARM compiler to remove inline function calls for __set_CP and __get_CP.

Merge pull request #7032 from TomoYamanaka/feature-rtx_update ...

Update cmsis/rtx for Cortex-A

Fix RTOS-less build failed with cmsis/RTE_Components.h

RTX5: ignoring CPUID field in GIC implementation ...

updated interrupt handler for GCC and IAR