ATS1CPRP, Address Translate Stage 1 Current state PL1 Read PAN

The ATS1CPRP characteristics are:

Purpose

When ARMv8.2-ATS1E1 is implemented, performs a stage 1 address translation at PL1 and in the current Security state, where the value of PSTATE.PAN determines if a read from a location will generate a permission fault for a privileged access.

This System instruction is part of the Address translation instructions functional group.

Configuration

This instruction is introduced in ARMv8.2.

Attributes

ATS1CPRP is a 32-bit System instruction.

Field descriptions

The ATS1CPRP input value bit assignments are:

313029282726252423222120191817161514131211109876543210
Input address for translation

Bits [31:0]

Input address for translation. The resulting address can be read from the PAR.

This instruction takes a VA as input. In an implementation that includes EL2, when executed in Non-secure state, the resulting address is the IPA that is the output address of the stage 1 translation. Otherwise, the resulting address is a PA.

Executing the ATS1CPRP 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, c9, 0000000011111111001

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 :




18/04/2017 17:00

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