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Kernel: Move page remapping into Region::remap_page(index)

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Let Region deal with this, instead of everyone calling MemoryManager.
This commit is contained in:
Andreas Kling 2019-11-03 15:32:11 +01:00
parent dc35b1d647
commit fe455c5ac4
4 changed files with 31 additions and 30 deletions
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24
Kernel/VM/Region.cpp
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@ -96,7 +96,7 @@ int Region::commit()
return -ENOMEM;
}
vmobject().physical_pages()[i] = move(physical_page);
MM.remap_region_page(*this, i);
remap_page(i - first_page_index());
}
return 0;
}
@ -169,3 +169,25 @@ Bitmap& Region::ensure_cow_map() const
m_cow_map = make<Bitmap>(page_count(), true);
return *m_cow_map;
}
void Region::remap_page(size_t index)
{
ASSERT(page_directory());
InterruptDisabler disabler;
auto page_vaddr = vaddr().offset(index * PAGE_SIZE);
auto& pte = MM.ensure_pte(*page_directory(), page_vaddr);
auto& physical_page = vmobject().physical_pages()[first_page_index() + index];
ASSERT(physical_page);
pte.set_physical_page_base(physical_page->paddr().get());
pte.set_present(true);
if (should_cow(index))
pte.set_writable(false);
else
pte.set_writable(is_writable());
pte.set_user_allowed(is_user_accessible());
page_directory()->flush(page_vaddr);
#ifdef MM_DEBUG
dbg() << "MM: >> region.remap_page (PD=" << page_directory()->cr3() << ", PTE=" << (void*)pte.raw() << "{" << &pte << "}) " << name() << " " << page_vaddr << " => " << physical_page->paddr() << " (@" << physical_page.ptr() << ")";
#endif
}