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AR# 44678

13.3 EDK, MicroBlaze - Software failures occur when using write-back data cache


In EDK 13.3 only, when using a MicroBlaze processor with data cache set to write-back mode (XPAR_MICROBLAZE_DCACHE_USE_WRITEBACK = 1), standalone applications (no OS) might inexplicably fail or otherwise misbehave after a cache flush.

How do I resolve this issue?


Xil_DCacheFlush()/Xil_DCacheFlushRange() functions in the standalone v3_02_a BSP for MicroBlaze processor will invalidate data in the cache instead of flushing it for write-back caches. The effect of this can be that the MicroBlaze processor store instructions will not update memory, silently disregarding the changes.

A tactical patch is required to fix this issue. Extract the following file to the Xilinx EDK installation directory, like C:\Xilinx\13.3\EDK:

This issue is scheduled to be fixed in EDK 13.4.
AR# 44678
Date Created 10/21/2011
Last Updated 10/28/2011
Status Active
Type General Article
  • EDK - 13.3
  • Microblaze