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DCCMVAU, Data Cache line Clean by VA to PoU

The DCCMVAU characteristics are:

Purpose

Clean data or unified cache line by virtual address to PoU.

Configuration

AArch32 System instruction DCCMVAU performs the same function as AArch64 System instruction DC CVAU.

Attributes

DCCMVAU is a 32-bit System instruction.

Field descriptions

The DCCMVAU input value bit assignments are:

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Virtual address to use

Bits [31:0]

Virtual address to use. No alignment restrictions apply to this VA.

Executing the DCCMVAU instruction

Execution of this instruction might require an address translation from VA to PA, and that translation might fault. For more information, see 'AArch32 data cache maintenance instruction (DC*)' in the Arm® Architecture Reference Manual, Armv8, for Armv8-A architecture profile.

Accesses to this instruction use the following encodings:

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

coproc	opc1	CRn	CRm	opc2
0b1111	0b000	0b0111	0b1011	0b001

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.TOCU == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x03);
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR.TPU == '1' then
        AArch32.TakeHypTrapException(0x03);
    elsif EL2Enabled() && ELUsingAArch32(EL2) && HCR2.TOCU == '1' then
        AArch32.TakeHypTrapException(0x03);
    else
        DCCMVAU(R[t]);
elsif PSTATE.EL == EL2 then
    DCCMVAU(R[t]);
elsif PSTATE.EL == EL3 then
    DCCMVAU(R[t]);

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Arm® Architecture Registers Armv8, for Armv8-A architecture profile