Delete me: WriteBuffer_Drain ARMop (Rev #2, changes)

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» WriteBuffer_Drain ARMop

WriteBuffer_Drain ARMop

Use

Any writebuffers are to be drained so that any pending writes are guaranteed completed to memory.

Notes

Although ARMv7 has DSB and DMB instructions which perform write buffer drain-style operations in a cache-agnostic manner, these instructions do not operate on caches which are not fully integrated with the CPU – e.g. the PL310 L2 cache that’s typically used on Cortex-A9 systems. Therefore, to ensure bufferable data is fully flushed to main memory, this ARMop must be used rather than a single ARMv7 sync instruction.

See also

• OS_MMUControl 2