IC IALLUIS

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IC IALLUIS, Instruction Cache Invalidate All to PoU, Inner Shareable

Purpose

Invalidate all instruction caches in the Inner Shareable domain of the PE executing the instruction to the Point of Unification.

Configuration

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

This instruction is present only when FEAT_AA64 is implemented. Otherwise, direct accesses to IC IALLUIS are UNDEFINED.

Attributes

Field descriptions

Executing IC IALLUIS

The Rt field should be set to 0b11111. If the Rt field is not set to 0b11111, it is CONSTRAINED UNPREDICTABLE whether:

The instruction is UNDEFINED.
The instruction behaves as if the Rt field is set to 0b11111.

This system instruction is an alias of the SYS instruction.

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

IC IALLUIS{, <Xt>}

op0	op1	CRn	CRm	op2
0b01	0b000	0b0111	0b0001	0b000

if !IsFeatureImplemented(FEAT_AA64) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if AArch64_TreatICAsNOP(CacheType_Instruction, CacheOp_Invalidate, CacheOpScope_PoU) && !AArch64_CanTrapIC(CacheType_Instruction, CacheOp_Invalidate, CacheOpScope_PoU) then ExecuteAsNOP(); elsif EL2Enabled() && HCR_EL2().TPU == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && HCR_EL2().TICAB == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT) && (!HaveEL(EL3) || SCR_EL3().FGTEn == '1') && HFGITR_EL2().ICIALLUIS == '1' then AArch64_SystemAccessTrap(EL2, 0x18); else if AArch64_TreatICAsNOP(CacheType_Instruction, CacheOp_Invalidate, CacheOpScope_PoU) then ExecuteAsNOP(); else AArch64_IC(CacheOpScope_ALLUIS); end; end; elsif PSTATE.EL == EL2 then if AArch64_TreatICAsNOP(CacheType_Instruction, CacheOp_Invalidate, CacheOpScope_PoU) && !AArch64_CanTrapIC(CacheType_Instruction, CacheOp_Invalidate, CacheOpScope_PoU) then ExecuteAsNOP(); else if AArch64_TreatICAsNOP(CacheType_Instruction, CacheOp_Invalidate, CacheOpScope_PoU) then ExecuteAsNOP(); else AArch64_IC(CacheOpScope_ALLUIS); end; end; elsif PSTATE.EL == EL3 then if AArch64_TreatICAsNOP(CacheType_Instruction, CacheOp_Invalidate, CacheOpScope_PoU) then ExecuteAsNOP(); else AArch64_IC(CacheOpScope_ALLUIS); end; end;