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Modifying the Abstract Page Table and compiling the SHARC cores (Core 1 and 2) for Silicon Rev 1.0 does not appear to work.

Question asked by joe.rogers on Jan 6, 2017
Latest reply on Jan 6, 2017 by joe.rogers

According to the CCES help files, copying apt-sc589.c file to your project and modifying the memory page entries will modify the start routines of the MMU to configure the different memory ranges as required for a projects particular requirements.  For example, I wish to change a range of L2 SRAM so that it is uncached instead of cached:

 

0x20088000u, 0x2009FFFFu, ADI_MMU_WB_CACHED

 

So, I modified the above entry to look like this:

 

0x20088000u, 0x2009FFFFu, ADI_MMU_RW_UNCACHED

 

I then located a simple structure to this memory location for the exchange of data across all 3 cores.  This worked perfectly on the ezkit evaluation board running silicon rev. 0.1.  However, we have finally received production silicon rev 1.0, and this appears to not work.  If I compile for silicon rev "any", this works even on the Rev 1.0 silicon.

 

I seems like I have missed something, or there is an issue with the compiler.  Any insight?

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