Constant ID_AA64MMFR1_EL1 

pub const ID_AA64MMFR1_EL1: SysReg<ID_AA64MMFR1_EL1, MemoryModelFeatureRegister1>;

[arm/v9]: D24.2.83 ID_AA64MMFR1_EL1, AArch64 Memory Model Feature Register 1