target-arm: Add isread parameter to CPAccessFns
System registers might have access requirements which need to be described via a CPAccessFn and which differ for reads and writes. For this to be possible we need to pass the access function a parameter to tell it whether the access being checked is a read or a write. Signed-off-by: NPeter Maydell <peter.maydell@linaro.org> Reviewed-by: NAlex Bennée <alex.bennee@linaro.org> Reviewed-by: NEdgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: NSergey Fedorov <serge.fdrv@gmail.com> Message-id: 1454506721-11843-6-git-send-email-peter.maydell@linaro.org
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