add paging fork of aseg; totally not working yet.

[netwatch.git] / aseg-paging / vm_flags.h

diff --git a/aseg-paging/vm_flags.h b/aseg-paging/vm_flags.h
new file mode 100644 (file)
index 0000000..d89c9a8
--- /dev/null
+++ b/aseg-paging/vm_flags.h
@@ -0,0 +1,38 @@
+/** Page table and page directory flags.
+ *
+ *  From intel-sys.pdf.
+ *
+ *  @author Jacob Potter (jdpotter)
+ */
+
+#ifndef _VM_FLAGS_H
+#define _VM_FLAGS_H
+
+#define PDE_4M_ADDR_SHIFT       22
+#define PTE_4K_ADDR_SHIFT       12
+#define PDE_TABLE_ADDR_SHIFT    12
+#define PTE_FRAME_ADDR_MASK     (~((1 << PTE_4K_ADDR_SHIFT) - 1))
+#define PDE_TABLE_ADDR_MASK     (~((1 << PDE_TABLE_ADDR_SHIFT) - 1))
+
+#define PDE_ATTRIB_INDEX       (1 << 12)
+#define PDE_GLOBAL             (1 << 8)
+#define PDE_PAGE_SIZE          (1 << 7)
+#define PDE_DIRTY              (1 << 6)
+#define PDE_ACCESSED           (1 << 5)
+#define PDE_NO_CACHE           (1 << 4)
+#define PDE_WRITE_THROUGH      (1 << 3)
+#define PDE_USER               (1 << 2)
+#define PDE_READ_WRITE         (1 << 1)
+#define PDE_PRESENT            (1 << 0)
+
+#define PTE_GLOBAL             (1 << 8)
+#define PTE_ATTRIB_INDEX       (1 << 7)
+#define PTE_DIRTY              (1 << 6)
+#define PTE_ACCESSED           (1 << 5)
+#define PTE_NO_CACHE           (1 << 4)
+#define PTE_WRITE_THROUGH      (1 << 3)
+#define PTE_USER               (1 << 2)
+#define PTE_READ_WRITE         (1 << 1)
+#define PTE_PRESENT            (1 << 0)
+
+#endif /* _VM_FLAGS_H */