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ARMv8-M: Add SMP support to CM33 NTZ non-MPU port

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* Enable SMP for Arm Cortex-M33 NTZ port for
GCC, ArmClang, and IAR toolchains.
* Add per-core scheduler/port state: critical nesting.
* Introduce spinlocks and inter-core yield/wakeup (SEV/WFE) plus
primary/secondary core bring-up sync.
* Update PendSV (i.e., context switch assembly) for core-safe
preemption and restore paths.
* Extend port macros/hooks for SMP in portmacrocommon.h,
single-core builds remain unchanged.
* Add the SMP boot sequence along with the necessary steps to enable
SMP on Armv8-M based ports. This should help developers understand
the requirements and process for enabling SMP on their
Armv8-M based applications.
* Update the kernel checker script to accept comma separated years
in the copyright header.

Signed-off-by: Ahmed Ismail <Ahmed.Ismail@arm.com>
This commit is contained in:
Ahmed Ismail 2026-03-13 17:14:03 +00:00 • committed by Aniruddha Kanhere
parent c5c6f1514c
commit 5cf9ac5296
25 changed files with 682 additions and 151 deletions
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4
.github/scripts/kernel_checker.py vendored
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@ -2,6 +2,7 @@
#/*
# * FreeRTOS Kernel <DEVELOPMENT BRANCH>
# * Copyright (C) 2024 Amazon.com, Inc. or its affiliates. All Rights Reserved.
# * Copyright 2026 Arm Limited and/or its affiliates <open-source-office@arm.com>
# *
# * SPDX-License-Identifier: MIT
# *
@ -157,9 +158,10 @@ KERNEL_HEADER = [
FREERTOS_COPYRIGHT_REGEX = r"^(;|#)?( *(\/\*|\*|#|\/\/))? Copyright \(C\) 20\d\d Amazon.com, Inc. or its affiliates. All Rights Reserved\.( \*\/)?$"
ARM_COLLAB_YEAR_REGEX = r"20\d\d(?:-20\d\d|, 20\d\d)?"
FREERTOS_ARM_COLLAB_COPYRIGHT_REGEX = r"(^(;|#)?( *(\/\*|\*|#|\/\/))? Copyright \(C\) 20\d\d Amazon.com, Inc. or its affiliates. All Rights Reserved\.( \*\/)?$)|" + \
r"(^(;|#)?( *(\/\*|\*|#|\/\/))? Copyright 20\d\d(-20\d\d)? Arm Limited and/or its affiliates( +<open-source-office@arm\.com>)?( \*\/)?$)|" + \
rf"(^(;|#)?( *(\/\*|\*|#|\/\/))? Copyright { ARM_COLLAB_YEAR_REGEX } Arm Limited and/or its affiliates( +<open-source-office@arm\.com>)?( \*\/)?$)|" + \
r"(^(;|#)?( *(\/\*|\*|#|\/\/))? Copyright \(c\) 20\d\d(-20\d\d)? Arm Technology \(China\) Co., Ltd.All Rights Reserved\.( \*\/)?$)|" + \
r"(^(;|#)?( *(\/\*|\*|#|\/\/))? <open-source-office@arm\.com>( \*\/)?$)"