37 lines
906 B
C++
37 lines
906 B
C++
#pragma once
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#include "memory/pointer.h"
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#include "process/process.h"
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#include "util/optional.h"
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#include "init/multiboot2.h"
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constexpr const size_t page_size = 4096;
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struct PhysicalAllocator {
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public:
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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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struct entry_t {
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uint64_t page_count;
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pid_t owner;
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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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allocation_t allocPages(size_t page_count, pid_t owner);
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void free(allocation_t ptr);
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void force(allocation_t ptr, pid_t owner);
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entry_t getOwner(paddr_t from);
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private:
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struct Page {
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optional<Page*> next;
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entry_t entries[255];
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void forceEntry(entry_t entry);
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void cleanup();
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void compact();
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};
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static_assert(sizeof(Page) == page_size);
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Page* storage;
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};
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