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Kernel: Add mechanism to identity map the lowest 2MB

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Tom 2020-06-01 22:55:09 -06:00 • committed by Andreas Kling
parent 19190267a6
commit 841364b609
7 changed files with 40 additions and 12 deletions
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2
Kernel/VM/PageDirectory.h
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@ -52,6 +52,7 @@ public:
u32 cr3() const { return m_directory_table->paddr().get(); }
RangeAllocator& range_allocator() { return m_range_allocator; }
RangeAllocator& identity_range_allocator() { return m_identity_range_allocator; }
Process* process() { return m_process; }
const Process* process() const { return m_process; }
@ -62,6 +63,7 @@ private:
Process* m_process { nullptr };
RangeAllocator m_range_allocator;
RangeAllocator m_identity_range_allocator;
RefPtr<PhysicalPage> m_directory_table;
RefPtr<PhysicalPage> m_directory_pages[4];
HashMap<unsigned, RefPtr<PhysicalPage>> m_physical_pages;