do_sysreg.S

__start:
	mov	x19, #(1 << 20)
1:	mrs	x0, PMSELR_EL0
	sub	x19, x19, #1
	cbnz	x19, 1b

// Die
	mov	x0, #0x84000000
	add	x0, x0, #9
	hvc	#0
	b	.