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REVIDR, Revision ID Register

The REVIDR characteristics are:

Purpose

Provides implementation-specific minor revision information.

Configuration

AArch32 System register REVIDR bits [31:0] are architecturally mapped to AArch64 System register REVIDR_EL1[31:0] .

If REVIDR has the same value as MIDR, then its contents have no significance.

Attributes

REVIDR is a 32-bit register.

Field descriptions

The REVIDR bit assignments are:

313029282726252423222120191817161514131211109876543210
IMPLEMENTATION DEFINED

IMPLEMENTATION DEFINED, bits [31:0]

IMPLEMENTATION DEFINED.

Accessing the REVIDR

Accesses to this register use the following encodings:

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

coprocopc1CRnCRmopc2
0b11110b0000b00000b00000b110
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T0 == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x03);
    elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T0 == '1' then
        AArch32.TakeHypTrapException(0x03);
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TID1 == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x03);
    elsif EL2Enabled() && ELUsingAArch32(EL2) && HCR.TID1 == '1' then
        AArch32.TakeHypTrapException(0x03);
    else
        return REVIDR;
elsif PSTATE.EL == EL2 then
    return REVIDR;
elsif PSTATE.EL == EL3 then
    return REVIDR;
              


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