forked from Bananymous/banan-os
51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
#pragma once
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#include <kernel/Memory/Types.h>
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#include <stddef.h>
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namespace Kernel
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{
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class PhysicalRange
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{
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public:
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PhysicalRange(paddr_t, size_t);
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paddr_t reserve_page();
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void release_page(paddr_t);
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paddr_t reserve_contiguous_pages(size_t pages);
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void release_contiguous_pages(paddr_t paddr, size_t pages);
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paddr_t start() const { return m_paddr; }
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paddr_t end() const { return m_paddr + m_size; }
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bool contains(paddr_t addr) const { return m_paddr <= addr && addr < m_paddr + m_size; }
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size_t usable_memory() const { return m_data_pages * PAGE_SIZE; }
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size_t used_pages() const { return m_data_pages - m_free_pages; }
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size_t free_pages() const { return m_free_pages; }
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private:
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unsigned long long* ull_bitmap_ptr() { return (unsigned long long*)m_vaddr; }
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const unsigned long long* ull_bitmap_ptr() const { return (const unsigned long long*)m_vaddr; }
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paddr_t paddr_for_bit(unsigned long long) const;
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unsigned long long bit_for_paddr(paddr_t paddr) const;
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unsigned long long contiguous_bits_set(unsigned long long start, unsigned long long count) const;
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private:
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const paddr_t m_paddr { 0 };
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const size_t m_size { 0 };
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vaddr_t m_vaddr { 0 };
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const size_t m_bitmap_pages { 0 };
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const size_t m_data_pages { 0 };
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size_t m_free_pages { 0 };
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};
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}
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