armv7m7-imxrt117x: system freeze after using sysexec psh, soon after system startup

[mateusz-bloch]

The system freezes after entering 'sysexec psh' as soon after system startup. This issue arises with following the change armv7m/pmap: Add missing spinlock in the kernel.

Example:

�Phoenix-RTOS loader v. 1.21 rev: 8e760cc
hal: Cortex-M i.MX RT117x
dev/usb: Initializing usb-cdc(1.2)
dev/flash: Initialized flexspi1
dev/flash/nor: Probing flash id 0x0018709d on port 1.0
dev/flash/nor: Configured ISSI IS25WP128 16MB nor flash(2.0)
dev/pipe: Initialized rtt channel(8.0)
cmd: Executing pre-init script
console: Setting console to 0.0
Waiting for input,     0 [ms]    
Phoenix-RTOS microkernel v. 3.2 rev: 1508c43
hal: NXP i.MX RT117x ARMv7 Cortex-M7 r1 p2
hal: FPU, MPU, Thumb
hal: Using NVIC interrupt controller
hal: Using General Purpose Timer
vm: Initializing page allocator 10/160 KB, page_t=12
vm: Initializing memory mapper: (72*80) 5760
vm: Initializing kernel memory allocator: (16*48) 768
vm: Initializing memory objects
proc: Initializing thread scheduler, priorities=8
syscalls: Initializing syscall table [100]
main: Starting syspage programs: 'dummyfs', 'imxrt-multi', 'psh'
dummyfs: initialized
(psh)% sysexec psh

Edit:
It also freezes after these changes when I add executing tests in a new psh, as shown in this PR:

Example:

Phoenix-RTOS loader v. 1.21 rev: 8e760cc
hal: Cortex-M i.MX RT117x
dev/usb: Initializing usb-cdc(1.2)
dev/flash: Initialized flexspi1
dev/flash/nor: Probing flash id 0x0018709d on port 1.0
dev/flash/nor: Configured ISSI IS25WP128 16MB nor flash(2.0)
dev/pipe: Initialized rtt channel(8.0)
cmd: Executing pre-init script
console: Setting console to 0.0
Waiting for input,  1800 [ms]Phoenix-RTOS loader v. 1.21 rev: 8e760cc
hal: Cortex-M i.MX RT117x
dev/usb: Initializing usb-cdc(1.2)
dev/flash: Initialized flexspi1
dev/flash/nor: Probing flash id 0x0018709d on port 1.0
dev/flash/nor: Configured ISSI IS25WP128 16MB nor flash(2.0)
dev/pipe: Initialized rtt channel(8.0)
cmd: Executing pre-init script
console: Setting console to 0.0
Waiting for input,     0 [ms]    
Phoenix-RTOS microkernel v. 3.2 rev: 190338b
hal: NXP i.MX RT117x ARMv7 Cortex-M7 r1 p2
hal: FPU, MPU, Thumb
hal: Using NVIC interrupt controller
hal: Using General Purpose Timer
vm: Initializing page allocator 10/160 KB, page_t=12
vm: Initializing memory mapper: (72*80) 5760
vm: Initializing kernel memory allocator: (16*48) 768
vm: Initializing memory objects
proc: Initializing thread scheduler, priorities=8
syscalls: Initializing syscall table [100]
main: Starting syspage programs: 'dummyfs', 'imxrt-multi', 'psh'
dummyfs: initialized
(psh)% dmesg -D
(psh)% sysexec psh
(psh)% !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ 
Unknown command!
(psh)% echo $?
127
(psh)% 
(psh)% echo $?
0
(psh)%  ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿
Unknown command!
(psh)% exit
(psh)% dmesg -E
(psh)% 
phoenix-rtos-tests/psh/gibber: OK
phoenix-rtos-tests/psh/auth: ...

(psh)% dmesg -D
(psh)% sysexec psh

Or:

Phoenix-RTOS loader v. 1.21 rev: 8e760cc
hal: Cortex-M i.MX RT117x
dev/usb: Initializing usb-cdc(1.2)
dev/flash: Initialized flexspi1
dev/flash/nor: Probing flash id 0x0018709d on port 1.0
dev/flash/nor: Configured ISSI IS25WP128 16MB nor flash(2.0)
dev/pipe: Initialized rtt channel(8.0)
cmd: Executing pre-init script
console: Setting console to 0.0
Waiting for input,     0 [ms]    
Phoenix-RTOS microkernel v. 3.2 rev: 190338b
hal: NXP i.MX RT117x ARMv7 Cortex-M7 r1 p2
hal: FPU, MPU, Thumb
hal: Using NVIC interrupt controller
hal: Using General Purpose Timer
vm: Initializing page allocator 10/160 KB, page_t=12
vm: Initializing memory mapper: (72*80) 5760
vm: Initializing kernel memory allocator: (16*48) 768
vm: Initializing memory objects
proc: Initializing thread scheduler, priorities=8
syscalls: Initializing syscall table [100]
main: Starting syspage programs: 'dummyfs', 'imxrt-multi', 'psh'
dummyfs: initialized
(psh)% dmesg -D
(psh)% sysexec psh
(psh)% exit
(psh)% dmesg -E
(psh)% 
phoenix-rtos-tests/psh/prompt: OK
phoenix-rtos-tests/psh/autocompletion: ...

(psh)% dmesg -D
(psh)% sysexec psh

[agkaminski]

@mateusz-bloch Only thing that comes to my mind regarding this issue is that perhaps syspage mpu data is overwritten after init. Could you please check this change?
phoenix-rtos/phoenix-rtos-kernel#563

[mateusz-bloch]

@mateusz-bloch Only thing that comes to my mind regarding this issue is that perhaps syspage mpu data is overwritten after init. Could you please check this change? phoenix-rtos/phoenix-rtos-kernel#563

After a quick look, I don't see any changes regarding this issue.