Move aseg-paging to netwatch/

[netwatch.git] / netwatch / vm_flags.h

diff --git a/netwatch/vm_flags.h b/netwatch/vm_flags.h
new file mode 100644 (file)
index 0000000..f003516
--- /dev/null
+++ b/netwatch/vm_flags.h
@@ -0,0 +1,45 @@
+/** Page table and page directory flags.
+ *
+ *  From intel-sys.pdf.
+ *
+ *  @author Jacob Potter (jdpotter)
+ */
+
+#ifndef _VM_FLAGS_H
+#define _VM_FLAGS_H
+
+#define PTE_FOR(x)      (((unsigned int)(x) >> 12) & 0x3FF)
+#define PDE_FOR(x)      ((unsigned int)(x) >> 22)
+#define ADDR_12_MASK(x)        ((unsigned int)(x) & ~((1 << 12) - 1))
+#define ADDR_22_MASK(x)        ((unsigned int)(x) & ~((1 << 22) - 1))
+#define LOWER_12(x)    ((unsigned int)(x) & ((1 << 12) - 1))
+#define LOWER_22(x)    ((unsigned int)(x) & ((1 << 22) - 1))
+
+#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 */