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TLBIALLNSNH, TLB Invalidate All, Non-Secure Non-Hyp

The TLBIALLNSNH characteristics are:

Purpose

If EL2 is implemented, invalidate all cached copies of translation table entries from TLBs that are from any level of the translation table walk that would be required for stage 1 or stage 2 of the Non-secure PL1&0 translation regime, regardless of the associated VMID.

The invalidation only applies to the PE that executes this System instruction.

Configuration

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

Attributes

TLBIALLNSNH is a 32-bit System instruction.

Field descriptions

This instruction has no applicable fields.

The value in the register specified by <Rt> is ignored.

Executing the TLBIALLNSNH instruction

If this instruction is executed in a Secure privileged mode other than Monitor mode, then the behavior is CONSTRAINED UNPREDICTABLE, and one of the following behaviors must occur:

  • The instruction is UNDEFINED.
  • The instruction is treated as a NOP.
  • The instruction executes as if it had been executed in Monitor mode.

Accesses to this instruction use the following encodings:

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

coprocopc1CRnCRmopc2
0b11110b1000b10000b01110b100
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T8 == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x03);
    elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T8 == '1' then
        AArch32.TakeHypTrapException(0x03);
    else
        UNDEFINED;
elsif PSTATE.EL == EL2 then
    TLBIALLNSNH();
elsif PSTATE.EL == EL3 then
    if !HaveEL(EL2) then
        UNDEFINED;
    else
        TLBIALLNSNH();