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TLBI ASIDE1OS, TLB Invalidate by ASID, EL1, Outer Shareable

The TLBI ASIDE1OS characteristics are:

Purpose

Invalidates cached copies of translation table entries from TLBs that meet all the following requirements:

  • The entry is a stage 1 translation table entry.

  • The entry would be used for the specified ASID, and either:

    • Is from a level of lookup above the final level.

    • Is a non-global entry from the final level of lookup.

  • When EL2 is implemented and enabled in the Security state described by the current value of SCR_EL3.NS:

    • If HCR_EL2.{E2H, TGE} is not {1, 1}, the entry would be used with the current VMID, and would be required to translate an address using the EL1&0 translation regime.

    • If HCR_EL2.{E2H, TGE} is {1, 1}, the entry would be required to translate an address using the EL2&0 translation regime.

  • When EL2 is not implemented or is disabled in the current Security state, the entry would be required to translate an address using the EL1&0 translation regime.

The invalidation applies to all PEs in the same Outer Shareable shareability domain as the PE that executes this System instruction.

Configuration

This instruction is present only when ARMv8.4-TLBI is implemented. Otherwise, direct accesses to TLBI ASIDE1OS are UNDEFINED.

Attributes

TLBI ASIDE1OS is a 64-bit System instruction.

Field descriptions

The TLBI ASIDE1OS input value bit assignments are:

6362616059585756555453525150494847464544434241403938373635343332
ASIDRES0
RES0
313029282726252423222120191817161514131211109876543210

ASID, bits [63:48]

ASID value to match. Any appropriate TLB entries that match the ASID values will be affected by this System instruction.

If the implementation supports 16 bits of ASID, but only 8 bits are being used in the context being invalidated, the upper bits are RES0.

Bits [47:0]

Reserved, RES0.

Executing the TLBI ASIDE1OS instruction

Accesses to this instruction use the following encodings:

TLBI ASIDE1OS{, <Xt>}

op0op1CRnCRmop2
0b010b0000b10000b00010b010
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TTLB == '1' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TTLBOS == '1' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    else
        TLBI_ASIDE1OS(X[t]);
elsif PSTATE.EL == EL2 then
    TLBI_ASIDE1OS(X[t]);
elsif PSTATE.EL == EL3 then
    TLBI_ASIDE1OS(X[t]);
              


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