TLBI ASIDE1, TLB Invalidate by ASID, EL1

The TLBI ASIDE1 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 the PE that executes this System instruction.

Configuration

There are no configuration notes.

Attributes

TLBI ASIDE1 is a 64-bit System instruction.

Field descriptions

The TLBI ASIDE1 input value bit assignments are:

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, then the upper 8 bits of the ASID must be written to 0 by software when the context being invalidated only uses 8 bits.

Bits [47:0]

Reserved, RES0.

if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && HCR_EL2.TTLB == '1' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    elsif EL2Enabled() && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HFGITR_EL2.TLBIASIDE1 == '1' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    elsif EL2Enabled() && HCR_EL2.FB == '1' then
        TLBI_ASIDE1IS(X[t]);
    else
        TLBI_ASIDE1(X[t]);
elsif PSTATE.EL == EL2 then
    TLBI_ASIDE1(X[t]);
elsif PSTATE.EL == EL3 then
    TLBI_ASIDE1(X[t]);