33 lines
750 B
C++
33 lines
750 B
C++
#pragma once
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#include "init/multiboot2.h"
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#include "memory/pointer.h"
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#include "util/optional.h"
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constexpr const size_t page_size = 4096;
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struct PhysicalAllocator {
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struct allocation_t {
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paddr_t ptr;
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size_t page_count;
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};
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static void init(const multiboot::tag_mmap* multiboot_info);
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static PhysicalAllocator& getInstance();
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optional<allocation_t> allocPages(size_t page_count, size_t alignment_pages = 1);
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void free(allocation_t ptr);
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bool force(allocation_t ptr, bool free);
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private:
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struct page_t {
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page_t* next;
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page_t* prev;
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uint64_t count[510];
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};
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static_assert(sizeof(page_t) == page_size);
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page_t* storage;
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friend struct PhysicalAllocatorImpl;
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};
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