DCCMVAC, Data Cache line Clean by VA to PoC

The DCCMVAC characteristics are:

Purpose

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

This System instruction is part of the Cache maintenance instructions functional group.

Configuration

AArch32 System instruction DCCMVAC performs the same function as AArch64 System instruction DC CVAC.

Attributes

DCCMVAC is a 32-bit System instruction.

Field descriptions

The DCCMVAC input value bit assignments are:

313029282726252423222120191817161514131211109876543210
Virtual address to use

Bits [31:0]

Virtual address to use.

Executing the DCCMVAC instruction

This instruction is executed using MCR with the following syntax:

MCR <syntax>

This syntax uses the following encoding in the System instruction encoding space:

<syntax> opc1opc2CRncoprocCRm
p15, 0, <Rt>, c7, c10, 1000001011111111010

Accessibility

The instruction is executable as follows:

Control Accessibility
E2HTGENSEL0EL1EL2EL3
xx0 - WO n/a WO
x01 - WOWOWO
x11 - n/a WOWO

This table applies to all syntax that can be used to execute this instruction.

Traps and enables

For a description of the prioritization of any generated exceptions, see section G1.11.2 (Exception priority order) in the ARM® Architecture Reference Manual, ARMv8, for ARMv8-A architecture profile for exceptions taken to AArch32 state, and section D1.13.2 (Synchronous exception prioritization) for exceptions taken to AArch64 state. Subject to the prioritization rules, the following traps and enables are applicable when executing this System instruction.

When EL2 is implemented and is using AArch64 and SCR_EL3.NS==1 && HCR_EL2.E2H==0 :

When EL2 is implemented and is using AArch64 and SCR_EL3.NS==1 && HCR_EL2.E2H==1 && HCR_EL2.TGE==0 :

When EL2 is implemented and is using AArch32 and SCR_EL3.NS==1 :




28/09/2017 08:24

Copyright © 2010-2017 ARM Limited or its affiliates. All rights reserved. This document is Non-Confidential.