DTLBIALL

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DTLBIALL, Data TLB Invalidate All

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:

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

Configuration

This instruction is present only when FEAT_AA32EL1 is implemented. Otherwise, direct accesses to DTLBIALL are UNDEFINED.

Attributes

Field descriptions

Executing DTLBIALL

The following pseudocode describes traps which apply to the System instruction. For information about changes to the scope of the invalidation to the instruction under different conditions, see the relevant instruction in the Pseudocode for AArch32 operation.

Accesses to this instruction use the following encodings in the System instruction encoding space:

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

coproc	opc1	CRn	CRm	opc2
0b1111	0b000	0b1000	0b0110	0b000

if !IsFeatureImplemented(FEAT_AA32EL1) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if EL2Enabled() && IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2) && HSTR_EL2().T8 == '1' then AArch64_AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && IsFeatureImplemented(FEAT_AA32EL2) && ELUsingAArch32(EL2) && HSTR().T8 == '1' then AArch32_TakeHypTrapException(0x03); elsif EL2Enabled() && IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2) && HCR_EL2().TTLB == '1' then AArch64_AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && IsFeatureImplemented(FEAT_AA32EL2) && ELUsingAArch32(EL2) && HCR().TTLB == '1' then AArch32_TakeHypTrapException(0x03); else AArch32_DTLBI_ALL(SecurityStateAtEL(EL1), Regime_EL10, VMID(), Broadcast_NSH, TLBI_AllAttr); end; elsif PSTATE.EL == EL2 then AArch32_DTLBI_ALL(SecurityStateAtEL(EL1), Regime_EL10, VMID(), Broadcast_NSH, TLBI_AllAttr); elsif PSTATE.EL == EL3 then AArch32_DTLBI_ALL(SecurityStateAtEL(EL3), Regime_EL30, VMID(), Broadcast_NSH, TLBI_AllAttr); end;