You copied the Doc URL to your clipboard.

ERXMISC2_EL1, Selected Error Record Miscellaneous Register 2

The ERXMISC2_EL1 characteristics are:

Purpose

Accesses ERR<n>MISC2 for the error record selected by ERRSELR_EL1.SEL.

Configuration

AArch64 System register ERXMISC2_EL1 bits [31:0] are architecturally mapped to AArch32 System register ERXMISC4[31:0] .

AArch64 System register ERXMISC2_EL1 bits [63:32] are architecturally mapped to AArch32 System register ERXMISC5[31:0] .

This register is present only when ARMv8.4-RAS is implemented. Otherwise, direct accesses to ERXMISC2_EL1 are UNDEFINED.

Attributes

ERXMISC2_EL1 is a 64-bit register.

Field descriptions

The ERXMISC2_EL1 bit assignments are:

6362616059585756555453525150494847464544434241403938373635343332
ERR<n>MISC2
ERR<n>MISC2
313029282726252423222120191817161514131211109876543210

Bits [63:0]

ERXMISC2_EL1 accesses ERR<n>MISC2, where n is the value in ERRSELR_EL1.SEL.

Accessing the ERXMISC2_EL1

If ERRIDR_EL1.NUM == 0 or ERRSELR_EL1.SEL is set to a value greater than or equal to ERRIDR_EL1.NUM, then one of the following occurs:

  • An UNKNOWN record is selected.

  • ERXMISC2_EL1 is RAZ/WI.

  • Direct reads and writes of ERXMISC2_EL1 are NOPs.

  • Direct reads and writes of ERXMISC2_EL1 are UNDEFINED.

Accesses to this register use the following encodings:

MRS <Xt>, ERXMISC2_EL1

op0op1CRnCRmop2
0b110b0000b01010b01010b010
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TERR == '1' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && SCR_EL3.TERR == '1' then
        AArch64.SystemAccessTrap(EL3, 0x18);
    else
        return ERXMISC2_EL1;
elsif PSTATE.EL == EL2 then
    if HaveEL(EL3) && !ELUsingAArch32(EL3) && SCR_EL3.TERR == '1' then
        AArch64.SystemAccessTrap(EL3, 0x18);
    else
        return ERXMISC2_EL1;
elsif PSTATE.EL == EL3 then
    return ERXMISC2_EL1;
              

MSR ERXMISC2_EL1, <Xt>

op0op1CRnCRmop2
0b110b0000b01010b01010b010
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TERR == '1' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && SCR_EL3.TERR == '1' then
        AArch64.SystemAccessTrap(EL3, 0x18);
    else
        ERXMISC2_EL1 = X[t];
elsif PSTATE.EL == EL2 then
    if HaveEL(EL3) && !ELUsingAArch32(EL3) && SCR_EL3.TERR == '1' then
        AArch64.SystemAccessTrap(EL3, 0x18);
    else
        ERXMISC2_EL1 = X[t];
elsif PSTATE.EL == EL3 then
    ERXMISC2_EL1 = X[t];
              


Was this page helpful? Yes No