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BPIMVA, Branch Predictor Invalidate by VA

The BPIMVA characteristics are:

Purpose

Invalidate virtual address from branch predictors.

Configuration

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

In an implementation where the branch predictors are architecturally invisible, this instruction can execute as a NOP.

Attributes

BPIMVA is a 32-bit System instruction.

Field descriptions

The BPIMVA input value bit assignments are:

313029282726252423222120191817161514131211109876543210
Virtual address to use

Bits [31:0]

Virtual address to use.

Executing the BPIMVA instruction

Accesses to this instruction use the following encodings:

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

coprocopc1CRnCRmopc2
0b11110b0000b01110b01010b111
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);
    else
        BPIMVA(R[t]);
elsif PSTATE.EL == EL2 then
    BPIMVA(R[t]);
elsif PSTATE.EL == EL3 then
    BPIMVA(R[t]);


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