arm/armv8-r: fix unable to switch context in ISR context

[anchao]

Summary

arm/armv8-r: fix unable to switch context in ISR context

Regression by #13651:

| commit 35c8c80a00a99ff0e19d51eaa74165bd830a36f8
| Author: ligd <[email protected]>
| Date:   Fri Jul 26 23:14:13 2024 +0800
|
| arch: change nxsched_suspend/resume_scheduler() called position

Signed-off-by: chao an [email protected]

Impact

N/A

Testing

CI-CHECK

[GUIDINGLI]

The SMP is another questions, so you should split to another patch or PR

[anchao]

The SMP is another questions, so you should split to another patch or PR

You should check your submission carefully if which have any rookie mistakes.

[anchao]

@GUIDINGLI @hujun260

After your and hujun's changes:

1. any irq_dispatch() call needs to properly refresh tcb to check if context switch has occurred
2. The trace location also needs to be updated carefully
3. new current registers must be update and return from ISR.

but your previous changes completely missed on some arm-specific chips:

[GUIDINGLI]

@anchao
Why NOT two patches fix two questions ?

[anchao]

@anchao Why NOT two patches fix two questions ?

@GUIDINGLI #14514 :)