S32K3 Dataflash Cache Disable

kjy106906 — Thu, 11 Jan 2024 23:42:03 GMT

I saw the below statement in the FLS driver:

Synchronize the memory by invalidating the cache after each flash hardware operation.
The FLS driver needs to maintain the memory coherency by means of three methods:
1. Disable data cache, or
2. Configure the flash region upon which the driver operates, as non-cacheable, or
3. Enable the FlsSynchronizeCache feature.
Depending on the application configuration, one option may be more beneficial than other.

I am concerned about performance speed because I am unable to disable all data caches. (num 1)
Therefore, I would like to disable Cache only in the DataFlash area. (num 2)
Please tell me how to disable cache in a specific area.

Re: S32K3 Dataflash Cache Disable

cuongnguyenphu — Mon, 26 Feb 2024 09:35:30 GMT

Hi,
I think with #2, you can use API provided in Mcl module : Mcl_CacheInvalidateByAddr() with input params as: Mcl_CacheType CacheType, uint32 Addr and uint32 Length to invalidate Cache by address of specific DataFls region as you want.
In detail, please see in MCL User Manual document

topic S32K3 Dataflash Cache Disable in S32K

S32K3 Dataflash Cache Disable

Re: S32K3 Dataflash Cache Disable