IMB_Full ARMop (changes)

Showing changes from revision #0 to #1: Added | Removed | Changed

» OS

» OS_MMUControl

» OS_MMUControl 2

» IMB_Full ARMop

IMB_Full ARMop

Use

A global instruction memory barrier (IMB) is to be performed.

Notes

An IMB is an operation that should be performed after new instructions have been stored and before they are executed. It guarantees correct operation for code modification (eg. something as simple as loading code to be executed).

On some ARMs, this operation may be null. On ARMs with harvard architecture this typically consists of:

1. Clean data cache
2. Drain write buffer
3. Invalidate instruction cache

There may be other considerations such as invalidating branch prediction caches.

Functionally, this call is equivalent to calling OS_SynchroniseCodeAreas with bit 0 of R0 clear.

See also

• OS_MMUControl 2
• OS_SynchroniseCodeAreas