ID_AA64DFR1_EL1, AArch64 Debug Feature Register 1

The ID_AA64DFR1_EL1 characteristics are:

Purpose

Reserved for future expansion of top level information about the debug system in AArch64 state.

For general information about the interpretation of the ID registers, see 'Principles of the ID scheme for fields in ID registers'.

Configuration

There are no configuration notes.

Attributes

ID_AA64DFR1_EL1 is a 64-bit register.

Field descriptions

6362616059585756555453525150494847464544434241403938373635343332
313029282726252423222120191817161514131211109876543210
RES0
RES0

Bits [63:0]

Reserved, RES0.

Accessing ID_AA64DFR1_EL1

Accesses to this register use the following encodings in the System register encoding space:

MRS <Xt>, ID_AA64DFR1_EL1

op0op1CRnCRmop2
0b110b0000b00000b01010b001

if PSTATE.EL == EL0 then if IsFeatureImplemented(FEAT_IDST) then if EL2Enabled() && HCR_EL2.TGE == '1' then AArch64.SystemAccessTrap(EL2, 0x18); else AArch64.SystemAccessTrap(EL1, 0x18); else UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && HCR_EL2.TID3 == '1' then AArch64.SystemAccessTrap(EL2, 0x18); else return ID_AA64DFR1_EL1; elsif PSTATE.EL == EL2 then return ID_AA64DFR1_EL1; elsif PSTATE.EL == EL3 then return ID_AA64DFR1_EL1;


30/06/2021 15:21; 2a17f7750cfd1ab239f20f6cf29877ba8041794f

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