You copied the Doc URL to your clipboard.

DTLBIALL, Data TLB Invalidate All

The DTLBIALL characteristics are:

Purpose

Invalidate all cached copies of translation table entries from data TLBs that are from any level of the translation table walk. The entries that are invalidated are as follows:

  • If executed at Secure EL1 when EL3 is using AArch64, all entries that would be required for the Secure EL1&0 translation regime.
  • If executed in Secure state when EL3 is using AArch32, all entries that would be required for the Secure PL1&0 translation regime.
  • If executed at Non-secure EL1, all stage 1 translation table entries that would be required for the Non-secure PL1&0 translation regime and, if EL2 is implemented, they must match the current VMID.
  • If executed at EL2, the stage 1 or stage 2 translation table entries that would be required for the Non-secure PL1&0 translation regime and matches the current VMID.

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

Arm deprecates the use of this instruction. It is only provided for backwards compatibility with earlier versions of the Arm architecture.

Configuration

Attributes

DTLBIALL is a 32-bit System instruction.

Field descriptions

DTLBIALL ignores the value in the register specified by the instruction encoding. Software does not have to write a value to the register before issuing this instruction.

Executing the DTLBIALL instruction

Accesses to this instruction use the following encodings:

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

opc1opc2CRncoprocCRm
0b0000b0000b10000b11110b0110
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);
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TTLB == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x03);
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR.TTLB == '1' then
        AArch32.TakeHypTrapException(0x03);
    else
        DTLBIALL();
elsif PSTATE.EL == EL2 then
    DTLBIALL();
elsif PSTATE.EL == EL3 then
    DTLBIALL();
              


Was this page helpful? Yes No