yangsong8-a1 opened a new pull request, #18244:
URL: https://github.com/apache/nuttx/pull/18244
## Summary
This PR introduces a comprehensive safety driver module:
1. **Safety Upper-Half Driver**: A new generic safety module driver that
supports multiple safety monitoring functions:
- Clock monitoring
- Power monitoring
- Memory (RAM/ROM) monitoring
- Bus monitoring
- Temperature monitoring
- Register monitoring
- CPU monitoring
- MPU monitoring
2. **Register Monitor Module**: A specialized register monitoring component
that continuously monitors hardware registers for anomalies and corruption,
improving system reliability in multi-core environments.
3. **Coverity Fixes**: Multiple code quality improvements including:
- Single entry/exit point functions for better flow control
- Proper type conversions for unsigned long to pointer handling
- Symbol scope optimization
- Data type conversion improvements
- Mutex unlock issue fixes
## Impact
- **Stability**: Improved system stability through continuous hardware
monitoring
- **Reliability**: Better detection and handling of register corruption in
multi-core systems
- **Compatibility**: No breaking changes, fully backward compatible
## Testing
### Test Environment
- Host: ubuntu
- Devices: qemu and local tc4dx evb board
- Configuration: CONFIG_SAFETY and CONFIG_SAFETY_REGISTER_MONITOR enabled
### Test Steps
1. Enable safety module in menuconfig: `CONFIG_SAFETY=y`
2. Enable register monitor: `CONFIG_SAFETY_REGISTER_MONITOR=y`
3. call reg_monitor_initialize when initialize to register node.
4. Compile NuttX kernel
5. Test safety monitoring via ioctl and poll operations
[hello_main.c](https://github.com/user-attachments/files/24911134/hello_main.c)
### Test Results
```
nsh> safety_ctl
please input para:
1: test open and close
2: test read fail
3: test selftest
4: test inject and safety_handler
5: test poll
6: test hardware safe state
nsh> safety_ctl 1
-----test open close success----
nsh> safety_ctl 2
ret: -1, result.type: 0x0
-----can not read any result----
nsh> safety_ctl 3
ret: -1, result.type: 0x0
-----success: can not find any failed----
nsh> safety_ctl 4
ret: 2, result.type: 0x1
-----rewrite operation success----
nsh> safety_ctl 5
ret: 2, result.type: 0x1
-----rewrite operation success----
-----test poll finish----
nsh> safety_ctl 6
-----Register modification detected, rewrite successful.----
nsh> safety_ctl 2
ret: 2, result.type: 0x1
nsh>
```
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