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memory: introduce memory_region_set_alias_offset()

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Add an API to update an alias offset of an active alias.  This can be
used to simplify implementation of dynamic memory banks.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2011-12-04 19:16:50 +02:00
parent 2282e1af40
commit 4703359e0e
2 changed files with 26 additions and 0 deletions
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12
memory.h
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@ -529,6 +529,18 @@ void memory_region_set_enabled(MemoryRegion *mr, bool enabled);
*/
void memory_region_set_address(MemoryRegion *mr, target_phys_addr_t addr);
/*
* memory_region_set_alias_offset: dynamically update a memory alias's offset
*
* Dynamically updates the offset into the target region that an alias points
* to, as if the fourth argument to memory_region_init_alias() has changed.
*
* @mr: the #MemoryRegion to be updated; should be an alias.
* @offset: the new offset into the target memory region
*/
void memory_region_set_alias_offset(MemoryRegion *mr,
target_phys_addr_t offset);
/* Start a transaction; changes will be accumulated and made visible only
* when the transaction ends.
*/