src/kernel --> src/

src/mem/paging.h

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