[QUESTION] How to flush instruction cache?

theHobbit · Post by **theHobbit** » Wed Dec 23, 2009 11:19 am

Hi, i am trying to test the psx4all port for Dingoo on the PSP to learn about the mips recompiler it is using. But i found it uses the function cacheflush defined in sys/cachectl.h to flush the instruction cache, and it seems it isn´t available on the pspsdk. I found more about it here cacheflush

Is there an instruction to flush the instruction cache on the PSP?.

Thanks in advance.

psPea · Post by **psPea** » Wed Dec 23, 2009 11:41 am

sceKernelIcacheInvalidateAll()
it requires kernel mode i believe

Raphael · Post by **Raphael** » Wed Dec 23, 2009 7:48 pm

Following the description of cacheflush, it would rather be
sceKernelDCacheInvalidateRange(*addr, size);
sceKernelICacheInvalidateRange(*addr, size);
or
sceKernelDCacheWritebackInvalidateRange(*addr, size);
sceKernelICacheWritebackInvalidateRange(*addr, size);
depending on need.

Write a wrapper function and and it should be ok.

theHobbit · Post by **theHobbit** » Thu Dec 24, 2009 12:59 am

Thanks for your answers, i will test those :).

hlide · Post by **hlide** » Thu Dec 24, 2009 10:36 pm

sheeh, another guy trying to port it... a port of a port of a port... dude, it's like redoing ps1p or psxp...