forked from Bananymous/banan-os
62 lines
1.1 KiB
C++
62 lines
1.1 KiB
C++
#pragma once
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#include <kernel/Memory/Types.h>
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#include <kernel/SpinLock.h>
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namespace Kernel
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{
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class MMU
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{
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public:
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using flags_t = uint8_t;
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enum Flags : flags_t
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{
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Present = 1,
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ReadWrite = 2,
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UserSupervisor = 4,
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};
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public:
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static void initialize();
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static MMU& kernel();
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static MMU& current();
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MMU();
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~MMU();
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void identity_map_page(paddr_t, flags_t);
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void identity_map_range(paddr_t, size_t bytes, flags_t);
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void unmap_page(vaddr_t);
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void unmap_range(vaddr_t, size_t bytes);
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void map_page_at(paddr_t, vaddr_t, flags_t);
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paddr_t physical_address_of(vaddr_t) const;
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flags_t get_page_flags(vaddr_t) const;
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bool is_page_free(vaddr_t) const;
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bool is_range_free(vaddr_t, size_t bytes) const;
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vaddr_t get_free_page() const;
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vaddr_t get_free_contiguous_pages(size_t page_count) const;
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void invalidate(vaddr_t);
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void load();
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void lock() const { m_lock.lock(); }
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void unlock() const { m_lock.unlock(); }
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private:
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uint64_t get_page_data(vaddr_t) const;
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void initialize_kernel();
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private:
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uint64_t* m_highest_paging_struct { nullptr };
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mutable RecursiveSpinLock m_lock;
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};
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}
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