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As part of ARMv8M, we need to add support for the PMSAv8 MPU architecture. PMSAv8 differs from PMSAv7 both in register/data layout (for instance using base and limit registers rather than base and size) and also in behaviour (for example it does not have subregions); rather than trying to wedge it into the existing PMSAv7 code and data structures, we define separate ones. This commit adds the data structures which hold the state for a PMSAv8 MPU and the register interface to it. The implementation of the MPU behaviour will be added in a subsequent commit. Backports commit 0e1a46bbd2d6c39614b87f4e88ea305acce8a35f from qemu |
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