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Kernel: Move create_identity_mapped_region() to MemoryManager

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This had no business being in RegionTree, since RegionTree doesn't track
identity-mapped regions anyway. (We allow *any* address to be identity
mapped, not just the ones that are part of the RegionTree's range.)
This commit is contained in:
Andreas Kling
2022-04-05 12:37:11 +02:00
parent 3dbb4bc3a6
commit e0da8da657
5 changed files with 12 additions and 13 deletions
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10
Kernel/Memory/MemoryManager.cpp
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@@ -1232,4 +1232,14 @@ void MemoryManager::copy_physical_page(PhysicalPage& physical_page, u8 page_buff
unquickmap_page();
}
ErrorOr<NonnullOwnPtr<Memory::Region>> MemoryManager::create_identity_mapped_region(PhysicalAddress address, size_t size)
{
auto vmobject = TRY(Memory::AnonymousVMObject::try_create_for_physical_range(address, size));
auto region = TRY(Memory::Region::create_unplaced(move(vmobject), 0, {}, Memory::Region::Access::ReadWriteExecute));
Memory::VirtualRange range { VirtualAddress { (FlatPtr)address.get() }, size };
region->m_range = range;
TRY(region->map(MM.kernel_page_directory()));
return region;
}
}