Hardfault occurs during clock initialization in S32K324

[jwkang]

I created a project on S32K324 and a hardfault occurs during clock initialization.
I am using RTD4.0.0, D2403 and FreeRtos V10.6.0.

A hardfault occurs when loading the critical section reentry_guard_MCU_EXCLUSIVE_AREA_01. It seems to be a RAM access issue.
What should I check?

Below are the problematic parts.

[VaneB]

Hi @jwkang 

In the Integration Manual for S32K3_S32M27X MCU Driver it is noted that MCU_EXCLUSIVE_AREA_01 is used in functions Clock_Ip_InitClock() and Clock_Ip_DisableClockMonitor() to protect against itself in the context of multicore usage of it and ISR event.

For example a critical situation will be: Clock_Ip_InitClock() is called from Core0 and during the excecution in Core0, Clock_Ip_InitClock() is called from another core (Core1). It is called from Core1 while the first call is still in progress (it has not returned yet).

BR, VaneB

[jwkang]

Yes, I understand the content. When I looked at the address, it seemed to be a memory access problem, so I modified the memory map in the linker file. Then, a hardfault occurs in OsIf_Init.

Looking at the map file, the address is in the mcal_bss area.

Is the address in my linker file wrong?

Please, check this.

Thanks.

[VaneB]

Hi @jwkang 

Let's first try to work with access to MCU_EXCLUSIVE_AREA_01. Return the linker file to how it was before the OsIf_Init function failed and if possible could you give me more details regarding how you are using the Clock_Ip_Init() function.

[jwkang]

This problem was caused by a problem with the generated Linker file.

In the linker_flash_c0_s32k324.ld file, as shown in the figure, the hardfault stopped occurring when the __RAM_CACHEABLE_SIZE value was changed to 0x12.

It seems that there is a problem with the project creation.

Can you tell me what the __RAM_SHAREABLE_SIZE, __RAM_NO_CACHEABLE_SIZE, and __RAM_CACHEABLE_SIZE values ​​mean?

Please check if the values ​​are correct.

[VaneB]

Hi @jwkang 

Check the application note: AN13388 S32K3 Memories Guide. It contains information about the memory features included in the S32K3 Product Family andalso shows the implementation of the Linker file and Startup.