LU-12461 contrib: Add epython scripts for crash dump analysis

[fs/lustre-release.git] / contrib / debug_tools / epython_scripts / crashlib / addrlib.py

diff --git a/contrib/debug_tools/epython_scripts/crashlib/addrlib.py b/contrib/debug_tools/epython_scripts/crashlib/addrlib.py
new file mode 100644 (file)
index 0000000..d06a769
--- /dev/null
+++ b/contrib/debug_tools/epython_scripts/crashlib/addrlib.py
@@ -0,0 +1,22 @@
+
+"""
+Set of routines for manipulating addresses.
+Copyright 2014 Cray Inc.  All Rights Reserved
+"""
+
+import crashlib.cid
+import crashlib.cid.machdep_table
+
+# --------------------------------------------------------------------------
+
+def ptov(physaddr):
+    """Convert a physical address to a kernel virtual address."""
+    return int(physaddr) + crashlib.cid.mdtbl.kvbase
+
+def phys2pfn(physaddr):
+    """Convert a physical address to a page offset."""
+    return physaddr >> crashlib.cid.mdtbl.pageshift
+
+def pfn2phys(pfn):
+    """Convert a page offset into a physical address."""
+    return pfn << crashlib.cid.mdtbl.pageshift