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42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
// Copyright (c) 2023-2026 Chris (boreddevnl)
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// This software is released under the GNU General Public License v3.0. See LICENSE file for details.
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// This header needs to maintain in any file it is present in, as per the GPL license terms.
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#ifndef PAGING_H
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#define PAGING_H
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#include <stdint.h>
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#include <stdbool.h>
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#define PAGE_SIZE 4096
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// Page Table Entry Flags
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#define PT_PRESENT (1ull << 0)
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#define PT_RW (1ull << 1)
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#define PT_USER (1ull << 2)
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#define PT_WRITE_THROUGH (1ull << 3)
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#define PT_CACHE_DISABLE (1ull << 4)
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#define PT_ACCESSED (1ull << 5)
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#define PT_DIRTY (1ull << 6)
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#define PT_HUGE (1ull << 7)
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#define PT_GLOBAL (1ull << 8)
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#define PT_NX (1ull << 63)
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#define PT_ADDR_MASK 0x000FFFFFFFFFF000ull
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typedef struct {
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uint64_t entries[512];
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} __attribute__((aligned(PAGE_SIZE))) page_table_t;
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uint64_t paging_get_pml4_phys(void);
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void paging_map_page(uint64_t pml4_phys, uint64_t virtual_addr, uint64_t physical_addr, uint64_t flags);
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uint64_t paging_create_user_pml4_phys(void);
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void paging_switch_directory(uint64_t pml4_phys);
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void paging_destroy_user_pml4_phys(uint64_t pml4_phys);
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void paging_init(void);
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#endif // PAGING_H
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