• Vladimir Murzin's avatar
    ARM: 8757/1: NOMMU: Support PMSAv8 MPU · 046835b4
    Vladimir Murzin authored
    ARMv8R/M architecture defines new memory protection scheme - PMSAv8
    which is not compatible with PMSAv7.
    
    Key differences to PMSAv7 are:
     - Region geometry is defined by base and limit addresses
     - Addresses need to be either 32 or 64 byte aligned
     - No region priority due to overlapping regions are not allowed
     - It is unified, i.e. no distinction between data/instruction regions
     - Memory attributes are controlled via MAIR
    
    This patch implements support for PMSAv8 MPU defined by ARMv8R/M
    architecture.
    Signed-off-by: default avatarVladimir Murzin <vladimir.murzin@arm.com>
    Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
    046835b4
nommu.c 5.78 KB