Trace extension:
0b0000 Trace system registers not implemented.
Debugger, [3:0]
Debug architecture version:
0b0110 Armv8-A debug architecture implemented.
To access the ID_AA64DFR0_EL1:
MRS <Xt>, ID_AA64DFR0_EL1 ; Read ID_AA64DFR0_EL1 into Xt
Register access is encoded as follows:
Table B2-44 ID_AA64DFR0_EL1 access encoding
op0 op1 CRn CRm op2
11 000 0000 0101 000
The EDDFR can be accessed through the external debug interface, offset 0xD28.
B2 AArch64 system registers
B2.51 AArch64 Debug Feature Register 0, EL1
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B2-445
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