Hi Rebecca,

On Mon, Jan 4, 2021 at 02:58 PM, Rebecca Cran wrote:

> 
> +// UINT32
> +// ReadCCSIDR2 (
> +// IN UINT32 CSSELR
> +// )
> +ASM_FUNC(ReadCCSIDR2)
> + mcr p15,2,r0,c0,c0,0 @ Write Cache Size Selection Register (CSSELR)
> + isb
> + mrc p15,1,r0,c0,c2,0 @ Read current CP15 Cache Size ID Register
> (CCSIDR2)

I believe the instruction encoding for CCSIDR2 should be mrc p15,1,r0,c0,c0,2
Similar change is needed in ArmLibSupportV7.asm

> 
> + bx lr
> +

Regards,

Sami Mujawar