paging is not very funHEADmain

1 files changed, 33 insertions, 0 deletions

diff --git a/kernel/include/arch/i686/paging.h b/kernel/include/arch/i686/paging.h
new file mode 100644
index 0000000..3c0c335
--- /dev/null
+++ b/kernel/include/arch/i686/paging.h
@@ -0,0 +1,33 @@
+#pragma once
+
+#include <stddef.h>
+
+struct page_directory_t { // 32 bits
+    unsigned int present       : 1;
+    unsigned int rw_flag       : 1;
+    unsigned int access_lvl    : 1; //0 is for only ring0. 1 is for anybody.
+    unsigned int write_through : 1;
+    unsigned int cache_off     : 1;
+    unsigned int accessed      : 1;
+    unsigned int zero          : 1;
+    unsigned int page_size     : 1;
+    unsigned int unused        : 4;
+    unsigned int tbl_addr      : 20;
+};
+
+struct page_table_t {  // 32 bits
+    unsigned int present       : 1;
+    unsigned int rw_flag       : 1;
+    unsigned int access_lvl    : 1; //0 is for only ring0. 1 is for anybody.
+    unsigned int write_through : 1;
+    unsigned int cache_off     : 1;
+    unsigned int accessed      : 1;
+    unsigned int dirty         : 1;
+    unsigned int zero          : 1;
+    unsigned int global        : 1;
+    unsigned int reserved      : 3;
+    unsigned int phys_addr     : 20;
+};
+
+extern void ident_map_addr(void *addr, size_t len);
+extern void ident_unmap_addr(void *addr, size_t len);