Syntax

DMB option|#imm

Where:

option

Specifies the limitation on the barrier operation. Values are:

SY

Full system is the required shareability domain, reads and writes are the required access types in both Group A and Group B. This option is referred to as the full system DMB.

ST

Full system is the required shareability domain, writes are the required access type in both Group A and Group B.

LD

Full system is the required shareability domain, reads are the required access type in Group A, and reads and writes are the required access types in Group B.

ISH

Inner Shareable is the required shareability domain, reads and writes are the required access types in both Group A and Group B.

ISHST

Inner Shareable is the required shareability domain, writes are the required access type in both Group A and Group B.

ISHLD

Inner Shareable is the required shareability domain, reads are the required access type in Group A, and reads and writes are the required access types in Group B.

NSH

Non-shareable is the required shareability domain, reads and writes are the required access types in both Group A and Group B.

NSHST

Non-shareable is the required shareability domain, writes are the required access type in both Group A and Group B.

NSHLD

Non-shareable is the required shareability domain, reads are the required access type in Group A, and reads and writes are the required access types in Group B.

OSH

Outer Shareable is the required shareability domain, reads and writes are the required access types in both Group A and Group B.

OSHST

Outer Shareable is the required shareability domain, writes are the required access type in both Group A and Group B.

OSHLD

Outer Shareable is the required shareability domain, reads are the required access type in Group A, and reads and writes are the required access types in Group B.

imm

Is a 4-bit unsigned immediate, in the range 0 to 15.