Please find the following patch.    

 [Patch, microblaze]: Communicate in larger blocks with the target.
    
    Communicate in larger blocks with the target. The chunk of memory
    will be read from the target and then used in microblaze_analyze_prologue.
    The above process minimizes the transaction with the Debug Agent.
    
    ChangeLog:
    2014-06-17 Ajit Agarwal <ajitkum@xilinx.com>
    
        * microblaze-tdep.c (microblaze_analyze_prologue): Use of
        target_read_memory. Populate insn_block. Use of insn_block.
    
    Signed-off-by:Ajit Agarwal ajitkum@xilinx.com

Thanks & Regards
Ajit