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DFB

Data Full Barrier is a memory barrier that ensures the completion of memory accesses. If executed at EL2, this instruction orders memory accesses irrespective of their Exception level or associated VMID. If executed at EL1 or EL0, this instruction behaves as DSB SY.

This is an alias of DSB. This means:

  • The encodings in this description are named to match the encodings of DSB.
  • The description of DSB gives the operational pseudocode for this instruction.

System
(v.)

313029282726252423222120191817161514131211109876543210
11010101000000110011110010011111
CRmopc

System

DFB

is equivalent to

DSB #12

and is always the preferred disassembly.

Operation

The description of DSB gives the operational pseudocode for this instruction.