forked from xamidev/pepperOS
29 lines
673 B
C
29 lines
673 B
C
#ifndef PAGING_H
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#define PAGING_H
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#define PAGE_SIZE 4096
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#define BITS_PER_ROW 64
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#include <stdint.h>
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void paging_init();
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extern uint64_t hhdm_off;
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#define PHYS_TO_VIRT(x) ((void*)((uintptr_t)(x) + hhdm_off))
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#define VIRT_TO_PHYS(x) ((uintptr_t)(x) - hhdm_off)
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// Stole it
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#define ALIGN_UP(x, align) (((x) + ((align) - 1)) & ~((align) - 1))
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#define ALIGN_DOWN(x, align) ((x) & ~((align) - 1))
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// Page entry special bits
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// Bits set on a parent (directory, table) fall back to their children
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#define PTE_PRESENT (1ULL << 0)
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#define PTE_WRITE (1ULL << 1)
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#define PTE_USER (1ULL << 2)
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#define PTE_HUGE (1ULL << 7)
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#define PTE_NOEXEC (1ULL << 63)
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#endif |