Where to find ARM CortexM complete register list and description? ie. for stm32f746
You can probably find what you are looking for in this ST document PM0253: STM32F7 Series Cortex®-M7 processor programming manual 

The System Control Block (SCB) registers are architected, which is why they are mostly common with the Cortex-M3 (and where you should find much more documentation or examples). The reference manual for the particular processor will detail only the features which are specific to that processor.