MMU_ChangingEntry ARMop (changes)
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» OS
» OS_MMUControl
» OS_MMUControl 2
» MMU_ChangingEntry ARMop
MMU_ChangingEntry ARMop
| Entry | |
|---|---|
| R0 | Logical address of entry (page aligned) |
| Exit | |
|---|---|
| R0 | Corrupt |
Use
Call this when the MMU mapping is has about just to be changed for a single page entry (4k).
Notes
The operation must typically perform the following:
cleanInvalidateandinvalidateallcachesoverthe4krangeofthepageTLB or TLBs for the entry- Clean and invalidate all caches over the 4k range of the page
- Drain write buffer
- Globally invalidate TLB or TLBs for the entry
Note that the implementation is not expected to deal with changes to pages which are in active use by interrupt routines.
This operation should typically be used when a cacheable page has had its attributes changed in a way which will affect cache behaviour.
See also
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