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ICIALLUIS, Instruction Cache Invalidate All to PoU, Inner Shareable

The ICIALLUIS characteristics are:

Purpose

Invalidate all instruction caches Inner Shareable to PoU. If branch predictors are architecturally visible, also flush branch predictors.

Configuration

AArch32 System instruction ICIALLUIS performs the same function as AArch64 System instruction IC IALLUIS.

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

Attributes

ICIALLUIS 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 ICIALLUIS instruction

The PE ignores the value of <Rt>. Software does not have to write a value to this register before issuing this instruction.

Accesses to this instruction use the following encodings:

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

coprocopc1CRnCRmopc2
0b11110b0000b01110b00010b000
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T7 == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x03);
    elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T7 == '1' then
        AArch32.TakeHypTrapException(0x03);
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TPU == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x03);
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TICAB == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x03);
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TOCU == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x03);
    elsif EL2Enabled() && ELUsingAArch32(EL2) && HCR.TPU == '1' then
        AArch32.TakeHypTrapException(0x03);
    elsif EL2Enabled() && ELUsingAArch32(EL2) && HCR2.TICAB == '1' then
        AArch32.TakeHypTrapException(0x03);
    elsif EL2Enabled() && ELUsingAArch32(EL2) && HCR2.TOCU == '1' then
        AArch32.TakeHypTrapException(0x03);
    else
        ICIALLUIS();
elsif PSTATE.EL == EL2 then
    ICIALLUIS();
elsif PSTATE.EL == EL3 then
    ICIALLUIS();