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AMAIR_EL3, Auxiliary Memory Attribute Indirection Register (EL3)

The AMAIR_EL3 characteristics are:

Purpose

Provides IMPLEMENTATION DEFINED memory attributes for the memory regions specified by MAIR_EL3.

Configuration

This register is present only when HaveEL(EL3). Otherwise, direct accesses to AMAIR_EL3 are UNDEFINED.

RW fields in this register reset to architecturally UNKNOWN values.

Attributes

AMAIR_EL3 is a 64-bit register.

Field descriptions

The AMAIR_EL3 bit assignments are:

6362616059585756555453525150494847464544434241403938373635343332
IMPLEMENTATION DEFINED
IMPLEMENTATION DEFINED
313029282726252423222120191817161514131211109876543210

AMAIR_EL3 is permitted to be cached in a TLB.

IMPLEMENTATION DEFINED, bits [63:0]

IMPLEMENTATION DEFINED.

This field resets to an architecturally UNKNOWN value.

Accessing the AMAIR_EL3

Accesses to this register use the following encodings:

MRS <Xt>, AMAIR_EL3

op0op1CRnCRmop2
0b110b1100b10100b00110b000
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    UNDEFINED;
elsif PSTATE.EL == EL2 then
    UNDEFINED;
elsif PSTATE.EL == EL3 then
    return AMAIR_EL3;
              

MSR AMAIR_EL3, <Xt>

op0op1CRnCRmop2
0b110b1100b10100b00110b000
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    UNDEFINED;
elsif PSTATE.EL == EL2 then
    UNDEFINED;
elsif PSTATE.EL == EL3 then
    AMAIR_EL3 = X[t];
              


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