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.

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

Attributes

DCCMVAU is a 32-bit System instruction.

Field descriptions

The DCCMVAU input value bit assignments are:

313029282726252423222120191817161514131211109876543210
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 instructions (DC*)'.

Accesses to this instruction use the following encodings:

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

coprocopc1CRnCRmopc2
0b11110b0000b01110b10110b001

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]);




30/09/2020 15:07; ccead0cb9f089f9ceec50268e82aec9e71047211

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