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JOSCR, Jazelle OS Control Register

The JOSCR characteristics are:

Purpose

A Jazelle register, which provides operating system control of the Jazelle Extension.

Configuration

Attributes

JOSCR is a 32-bit register.

Field descriptions

The JOSCR bit assignments are:

313029282726252423222120191817161514131211109876543210
RAZ/WI

Bits [31:0]

Reserved, RAZ/WI.

Accessing the JOSCR

Accesses to this register use the following encodings:

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

coprocopc1CRnCRmopc2
0b11100b1110b00010b00000b000
if PSTATE.EL == EL0 then
    if boolean IMPLEMENTATION_DEFINED "JOSCR UNDEFINED at EL0" then
        UNDEFINED;
    else
        return JOSCR;
elsif PSTATE.EL == EL1 then
    return JOSCR;
elsif PSTATE.EL == EL2 then
    return JOSCR;
elsif PSTATE.EL == EL3 then
    return JOSCR;
              

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

coprocopc1CRnCRmopc2
0b11100b1110b00010b00000b000
if PSTATE.EL == EL0 then
    if boolean IMPLEMENTATION_DEFINED "JOSCR UNDEFINED at EL0" then
        UNDEFINED;
    else
        //no operation
elsif PSTATE.EL == EL1 then
    //no operation
elsif PSTATE.EL == EL2 then
    //no operation
elsif PSTATE.EL == EL3 then
    //no operation
              


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