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ERRIDR, Error Record ID Register

The ERRIDR characteristics are:

Purpose

Defines the highest numbered index of the error records that can be accessed through the Error Record System registers.

Configuration

AArch32 System register ERRIDR bits [31:0] are architecturally mapped to AArch64 System register ERRIDR_EL1[31:0] .

This register is present only when RAS is implemented. Otherwise, direct accesses to ERRIDR are UNDEFINED.

Attributes

ERRIDR is a 32-bit register.

Field descriptions

The ERRIDR bit assignments are:

313029282726252423222120191817161514131211109876543210
RES0NUM

Bits [31:16]

Reserved, RES0.

NUM, bits [15:0]

Highest numbered index of the records that can be accessed through the Error Record System registers plus one. Zero indicates that no records can be accessed through the Error Record System registers.

Each implemented record is owned by a node. A node might own multiple records.

Accessing the ERRIDR

Accesses to this register use the following encodings:

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

coprocopc1CRnCRmopc2
0b11110b0000b01010b00110b000
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T5 == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x03);
    elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T5 == '1' then
        AArch32.TakeHypTrapException(0x03);
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TERR == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x03);
    elsif EL2Enabled() && ELUsingAArch32(EL2) && HCR2.TERR == '1' then
        AArch32.TakeHypTrapException(0x03);
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && SCR_EL3.TERR == '1' then
        AArch64.AArch32SystemAccessTrap(EL3, 0x03);
    elsif HaveEL(EL3) && ELUsingAArch32(EL3) && PSTATE.M != M32_Monitor && SCR.TERR == '1' then
        AArch32.TakeMonitorTrapException();
    else
        return ERRIDR;
elsif PSTATE.EL == EL2 then
    if HaveEL(EL3) && !ELUsingAArch32(EL3) && SCR_EL3.TERR == '1' then
        AArch64.AArch32SystemAccessTrap(EL3, 0x03);
    elsif HaveEL(EL3) && ELUsingAArch32(EL3) && SCR.TERR == '1' then
        AArch32.TakeMonitorTrapException();
    else
        return ERRIDR;
elsif PSTATE.EL == EL3 then
    if PSTATE.M != M32_Monitor && SCR.TERR == '1' then
        AArch32.TakeMonitorTrapException();
    else
        return ERRIDR;
              


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