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kernel/include/memory/vmm.h

@@ -0,0 +1,41 @@
+#ifndef VMM_H
+#define VMM_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#define VMM_PRESENT    (1ULL << 0)
+#define VMM_WRITE      (1ULL << 1)
+#define VMM_USER       (1ULL << 2)
+#define VMM_PWT        (1ULL << 3)
+#define VMM_PCD        (1ULL << 4)
+#define VMM_ACCESSED   (1ULL << 5)
+#define VMM_DIRTY      (1ULL << 6)
+#define VMM_PSE        (1ULL << 7)
+#define VMM_GLOBAL     (1ULL << 8)
+#define VMM_NOEXEC     (1ULL << 63)
+
+typedef uint64_t vmm_pte_t;
+
+typedef struct {
+    vmm_pte_t* pml4;
+} vmm_pagemap_t;
+
+extern uintptr_t kernel_pml4_phys;
+
+void vmm_init(void);
+vmm_pagemap_t* vmm_create_pagemap(void);
+void vmm_switch_pagemap(vmm_pagemap_t* map);
+bool vmm_map_page(vmm_pagemap_t* map, uintptr_t virt, uintptr_t phys, uint64_t flags);
+void vmm_unmap_page(vmm_pagemap_t* map, uintptr_t virt);
+void vmm_unmap_page_noflush(vmm_pagemap_t* map, uintptr_t virt);
+bool vmm_virt_to_phys(vmm_pagemap_t* map, uintptr_t virt, uintptr_t* phys_out);
+bool vmm_get_page_flags(vmm_pagemap_t* map, uintptr_t virt, uint64_t* flags_out);
+vmm_pagemap_t* vmm_get_kernel_pagemap(void);
+vmm_pagemap_t* vmm_clone_pagemap(vmm_pagemap_t* src);
+void vmm_free_pagemap(vmm_pagemap_t* map);
+void vmm_sync_kernel_mappings(vmm_pagemap_t* map);
+void vmm_test(void);
+
+#endif