forked from Bananymous/banan-os
Bananymous
b74812d669
On-demand paging has not been used ever since I made userspace stack be a normal MemoryRegion.
44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
#pragma once
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#include <BAN/NoCopyMove.h>
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#include <BAN/UniqPtr.h>
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#include <BAN/Vector.h>
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#include <kernel/Memory/PageTable.h>
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namespace Kernel
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{
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class VirtualRange
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{
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BAN_NON_COPYABLE(VirtualRange);
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BAN_NON_MOVABLE(VirtualRange);
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public:
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static BAN::ErrorOr<BAN::UniqPtr<VirtualRange>> create_to_vaddr_range(PageTable&, AddressRange address_range, size_t, PageTable::flags_t flags, bool add_guard_pages);
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~VirtualRange();
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vaddr_t vaddr() const { return m_vaddr + (m_has_guard_pages ? PAGE_SIZE : 0); }
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size_t size() const { return m_size - (m_has_guard_pages ? 2 * PAGE_SIZE : 0); }
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PageTable::flags_t flags() const { return m_flags; }
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paddr_t paddr_of(vaddr_t vaddr) const { return m_page_table.physical_address_of(vaddr & PAGE_ADDR_MASK); }
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bool contains(vaddr_t address) const { return vaddr() <= address && address < vaddr() + size(); }
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private:
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VirtualRange(PageTable&, bool has_guard_pages, vaddr_t, size_t, PageTable::flags_t);
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BAN::ErrorOr<void> initialize();
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private:
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PageTable& m_page_table;
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const bool m_has_guard_pages;
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const vaddr_t m_vaddr;
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const size_t m_size;
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const PageTable::flags_t m_flags;
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SpinLock m_lock;
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friend class BAN::UniqPtr<VirtualRange>;
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};
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}
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