[Xen-devel] [PATCH 03/12] arm: handle xenheap which isn't at the start of RAM.

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
v2: Simplify page_to_virt by using mfn_to_virt & page_to_mfn as
    suggested by Tim.
---
 xen/include/asm-arm/mm.h |   12 +++++-------
 1 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/xen/include/asm-arm/mm.h b/xen/include/asm-arm/mm.h
index c0f5b1f..260af35 100644
--- a/xen/include/asm-arm/mm.h
+++ b/xen/include/asm-arm/mm.h
@@ -214,17 +214,15 @@ static inline struct page_info *virt_to_page(const void 
*v)
     ASSERT(va >= XENHEAP_VIRT_START);
     ASSERT(va < xenheap_virt_end);
 
-    return frame_table + ((va - XENHEAP_VIRT_START) >> PAGE_SHIFT);
+    return frame_table
+        + ((va - XENHEAP_VIRT_START) >> PAGE_SHIFT)
+        + xenheap_mfn_start
+        - frametable_base_mfn;
 }
 
 static inline void *page_to_virt(const struct page_info *pg)
 {
-    ASSERT((unsigned long)pg - FRAMETABLE_VIRT_START < frametable_virt_end);
-    return (void *)(XENHEAP_VIRT_START +
-                    ((unsigned long)pg - FRAMETABLE_VIRT_START) /
-                    (sizeof(*pg) / (sizeof(*pg) & -sizeof(*pg))) *
-                    (PAGE_SIZE / (sizeof(*pg) & -sizeof(*pg))));
-
+    return mfn_to_virt(page_to_mfn(pg));
 }
 
 struct domain *page_get_owner_and_reference(struct page_info *page);
-- 
1.7.9.1


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