CORTEX7-A
https://developer.arm.com/docs/ddi0464/latest/preface
ARMv7 ARM
https://static.docs.arm.com/ddi0406/c/DDI0406C_C_arm_architecture_reference_manual.pdf
MRC
https://developer.arm.com/ja/docs/dui0489/latest/arm-and-thumb-instructions/mrc-and-mrc2
MMU (armv8 mostly)
https://static.docs.arm.com/100940/0100/armv8_a_address%20translation_100940_0100_en.pdf