ATS12NSOPR, Address Translate Stages 1 and 2 Non-secure Only PL1 Read

The ATS12NSOPR characteristics are:

Purpose

Performs stage 1 and 2 address translations as defined for PL1 and the Non-secure state, with permissions as if reading from the given virtual address.

Configuration

Attributes

ATS12NSOPR is a 32-bit System instruction.

Field descriptions

The ATS12NSOPR 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 System instruction takes a VA as input. The resulting address is the PA that is the output address of the stage 2 translation.

Executing the ATS12NSOPR instruction

Accesses to this instruction use the following encodings:

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

coprocopc1CRnCRmopc2
0b11110b0000b01110b10000b100

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 !ELUsingAArch32(EL2) && SCR_EL3.<NS,EEL2> == '01' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif !ELUsingAArch32(EL3) && SCR_EL3.NS == '0' then AArch64.AArch32SystemAccessTrap(EL3, 0x03); else UNDEFINED; elsif PSTATE.EL == EL2 then ATS12NSOPR(R[t]); elsif PSTATE.EL == EL3 then ATS12NSOPR(R[t]);




27/03/2019 21:59; e5e4db499bf9867a4b93324c4dbac985d3da9376

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