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Some users of this library (i.e., FVP-AArch64 and RTSM-A15_MPCore) may be built to execute straight from NOR flash. Since device mappings should have the XN attribute set (according to the architecture), mapping the NOR flash as a device may prevent it from being executable. Since the NOR flash DXE driver is perfectly capable of setting the correct attributes for the region it needs to write to, and since we will be executing from DRAM by that time anyway, we can simply map the NOR flash as normal memory initially. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18890 6f19259b-4bc3-4df7-8a09-765794883524