How to validate program cache RAM after system reset

[Hui]

I want to use program cache RAM of (70102000 -  ) to run my flash drive of boot loader. 

But I found that the program cache RAM is invalidated after a system reset.

This is mentioned int the user manual . 

I have enable the cache register( program cache not bypass), but the program cache RAM still not available after  system reset.

So I want to know how to enable or reinitialize the program cache RAM after system reset? Thanks.

[dw]

IFX_INLINE void IfxCpu_enableSegmentSpecificInstructionAccessCacheability(uint16 segmentNumberMask, boolean enable);

Hi Hui,

Above function is for your reference.

dw

[Hui]

Hi dw,

The PCACHE SRAM is still not available with the function after system reset.

Mod tells me  "The cache will be invalidated on every reset. This is not switchable.", is it true?

[MoD]

Why you don't use the PSPR?

The cache will be invalidated on every reset. This is not switchable. Please note that the cache is not the same as PSPR which can be always directly access.

[Hui]

The PSPR of TC33LP is just 8KB not big enough for me, but the PCACHE RAM is 32KB. 

[Hui]

So you mean that after reset, PCACHE SRAM  can no longer be used？

[MoD · Accepted solution]

After each reset you must map the cache to normal address map. Please see user manual chapter 13.3.4.2 Memory Map selection, table 24 (Address Map) and in Appendix chapter 13.4.2 MEMMAP Implementation

[Hui]

Hi MoD,

The PCACHE can run my code normal as your way(MTU_MEMMAP.B.CPU0_PCMAP = 1;)

after system reset. Thanks a lot.