Added paging and fixed several bugs

1 files changed, 58 insertions, 1 deletions

diff --git a/src/kernel/paging/paging.h b/src/kernel/paging/paging.h
index e8c3bf4..790dbee 100644
--- a/src/kernel/paging/paging.h
+++ b/src/kernel/paging/paging.h
@@ -1,6 +1,63 @@
 #ifndef MELVIX_PAGING_H
 #define MELVIX_PAGING_H
 
-void enable_paging();
+#define PAGE_S 0x400000
+
+extern unsigned int *current_dir;
+extern unsigned int *root_dir;
+
+typedef struct {
+    unsigned int present    : 1;
+    unsigned int rw        : 1;
+    unsigned int user    : 1;
+    unsigned int accessed    : 1;
+    unsigned int dirty    : 1;
+    unsigned int unused    : 7;
+    unsigned int frame    : 20;
+} page_t;
+
+typedef struct {
+    page_t pages[1024];
+} page_table_t;
+
+typedef struct {
+    page_table_t *tables[1024];
+    unsigned int tables_physical[1024];
+    unsigned int physical_address;
+} page_directory_t;
+
+typedef struct {
+    page_table_t *tables[1024];
+} vpage_dir_t;
+
+extern vpage_dir_t *root_vpage_dir;
+
+#define EMPTY_TAB ((page_table_t*) 0x00000002)
+
+page_table_t *get_cr3();
+
+unsigned int get_cr0();
+
+void set_cr3(vpage_dir_t *dir);
+
+void set_cr0(unsigned int new_cr0);
+
+void switch_vpage_dir(vpage_dir_t *dir);
+
+vpage_dir_t *mk_vpage_dir();
+
+page_table_t *mk_vpage_table();
+
+void page_init();
+
+void vpage_map(vpage_dir_t *cr3, unsigned int virt, unsigned int phys);
+
+void vpage_map_user(vpage_dir_t *cr3, unsigned int virt, unsigned int phys);
+
+void convert_vpage(vpage_dir_t *kdir);
+
+void dump_page(vpage_dir_t *dir, unsigned int address);
+
+vpage_dir_t *copy_user_dir(vpage_dir_t *dir);
 
 #endif