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JIDR, Jazelle ID Register

The JIDR characteristics are:

Purpose

A Jazelle register, which identified the Jazelle architecture version.

Configuration

This register is present only when AArch32 is supported at any Exception level. Otherwise, direct accesses to JIDR are UNDEFINED.

Attributes

JIDR is a 32-bit register.

Field descriptions

The JIDR bit assignments are:

313029282726252423222120191817161514131211109876543210
RAZ

Bits [31:0]

Reserved, RAZ.

Accessing the JIDR

Accesses to this register use the following encodings:

MRC{<c>}{<q>} <coproc>, {#}<opc1>, <Rt>, <CRn>, <CRm>{, {#}<opc2>}

coprocopc1CRnCRmopc2
0b11100b1110b00000b00000b000
if PSTATE.EL == EL0 then
    if boolean IMPLEMENTATION_DEFINED "JIDR UNDEFINED at EL0" then
        UNDEFINED;
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.<E2H,TGE> != '11' && HCR_EL2.TID0 == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x05);
    elsif EL2Enabled() && ELUsingAArch32(EL2) && HCR.TID0 == '1' then
        AArch32.TakeHypTrapException(0x05);
    else
        return JIDR;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TID0 == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x05);
    elsif EL2Enabled() && ELUsingAArch32(EL2) && HCR.TID0 == '1' then
        AArch32.TakeHypTrapException(0x05);
    else
        return JIDR;
elsif PSTATE.EL == EL2 then
    return JIDR;
elsif PSTATE.EL == EL3 then
    return JIDR;