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Tom-on
50a1d6198e
* We did loose tasking and only have a paging skeleton, but hey it took like 4 months so i'm happy that there's something :p
37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
#ifndef _PAGING_H
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#define _PAGING_H
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#include <kernel.h>
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#define PAGE_FLAG_PRESENT (1 << 0) // Page is present in the table
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#define PAGE_FLAG_WRITE (1 << 1) // Read-write
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#define PAGE_FLAG_USER (1 << 2) // User-mode (DPL3) access allowed
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#define PAGE_FLAG_PWT (1 << 3) // Page write-thru
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#define PAGE_FLAG_NOCACHE (1 << 4) // Cache disable
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#define PAGE_FLAG_ACCESSED (1 << 5) // Indicates whether page was accessed
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#define PAGE_FLAG_DIRTY (1 << 6) // Page size (valid for PD and PDPT only)
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#define PAGE_FLAG_PAT (1 << 7) // Page Attribute Table (valid for PT only)
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#define PAGE_FLAG_GLOBAL (1 << 8) // Indicates the page is globally cached
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#define PAGE_FLAG_SHARED (1 << 9) // Userland page is shared
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// Region caching according to the Limine protocol
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#define PAGE_FLAG_CACHE (PAGE_FLAG_PWT | PAGE_FLAG_PAT)
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#define PAGE_SIZE 0x1000
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#define PAGE_SIZE_LARGE 0x200000
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#define PAGE_SIZE_HUGE 0x40000000
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#define PHYS_ADDR(_x) ((_x) & ~0xFFF)
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int pag_init(void);
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void pag_map(size_t vaddr, size_t paddr, size_t flags);
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size_t pag_umap(size_t vaddr);
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size_t pag_virt_to_phys(size_t vaddr);
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size_t* pag_get_pagedir();
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size_t* pag_get_task_pagedir(void* task);
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void pag_set_pagedir(size_t* pagedir);
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size_t* pag_alloc_pagedir();
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void pag_free_pagedir(size_t* pagedir);
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void pag_invalidate(size_t vaddr);
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#endif
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