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DSB

Data synchronization barrier.

Syntax

DSB  option|#imm

Where:

option

Is a barrier option name. The options are ordered in decreasing scope of the shareability domain. ARM recommends that you use the option names in preference to the equivalent #imm values.

Table 37. Data synchronization barrier options
optionimmOrdered Accesses (before-after)Shareability domain
LD13Load-Load, Load-Store 
ST14Store-StoreFull system
SY15Any-Any 
OSHLD1Load-Load, Load-Store 
OSHST2Store-StoreOuter shareable
OSH3Any-Any 
ISHLD9Load-Load, Load-Store 
ISHST10Store-StoreInner shareable
ISH11Any-Any 
NSHLD5Load-Load, Load-Store 
NSHST6Store-StoreNon-shareable
NSH7Any-Any 

imm

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