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ATS1CUR, Address Translate Stage 1 Current state Unprivileged Read

The ATS1CUR characteristics are:

Purpose

Performs stage 1 address translation as defined for PL0 and the current Security state, with permissions as if reading from the given virtual address.

Configuration

Attributes

ATS1CUR is a 32-bit System instruction.

Field descriptions

The ATS1CUR 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. If EL2 is implemented and enabled in the current Security 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 ATS1CUR instruction

Accesses to this instruction use the following encodings:

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

opc1opc2CRncoprocCRm
0b0000b0100b01110b11110b1000
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
        ATS1CUR(R[t]);
elsif PSTATE.EL == EL2 then
    ATS1CUR(R[t]);
elsif PSTATE.EL == EL3 then
    ATS1CUR(R[t]);
              


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