From eb114b9c880a8fbcf1ad461ff7fc9a37f7fc7cb6 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Wed, 14 Mar 2012 01:18:43 +0100
Subject: Fix Xen bootstrap at virtual address above 1GiB

* i386/intel/pmap.h (lin2pdpnum): New macro.
* i386/intel/pmap.c (pmap_set_page_readonly_init): Use lin2pdpnum macro
instead of hardcoding 0.
---
 i386/intel/pmap.h | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'i386/intel/pmap.h')

diff --git a/i386/intel/pmap.h b/i386/intel/pmap.h
index e02ad36..11bca80 100644
--- a/i386/intel/pmap.h
+++ b/i386/intel/pmap.h
@@ -100,6 +100,13 @@ typedef unsigned int	pt_entry_t;
 #define lin2pdenum(a)	(((a) >> PDESHIFT) & PDEMASK)
 #endif
 
+/*
+ *	Convert linear offset to page directory pointer index
+ */
+#if PAE
+#define lin2pdpnum(a)	(((a) >> PDPSHIFT) & PDPMASK)
+#endif
+
 /*
  *	Convert page descriptor index to linear address
  */
-- 
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