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2271a6ac0a
MicroBlaze will shortly need to update a parameter in place. Add an interface to read to match that for write. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>