[SeaBIOS] [PATCH 02/10] Move PAGE_SHIFT to memmap.h
Daniel Castro
evil.dani at gmail.com
Thu Aug 18 18:08:59 CEST 2011
PAGE_SHIFT is used by both Virtio and Xen as a contant when moving
addresses from guest space to machine space, in order to have a
single definition PAGE_SHIFT has been moved to memmap.h. This has
no impact on neither virtio or xen.
Signed-off-by: Daniel Castro <evil.dani at gmail.com>
---
src/memmap.h | 2 ++
src/virtio-ring.h | 2 +-
2 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/src/memmap.h b/src/memmap.h
index 01c7ddb..8674168 100644
--- a/src/memmap.h
+++ b/src/memmap.h
@@ -21,6 +21,8 @@ void memmap_finalize(void);
// A typical OS page size
#define PAGE_SIZE 4096
+//Used by Virtio and Xen
+#define PAGE_SHIFT 12
// e820 map storage (defined in system.c)
extern struct e820entry e820_list[];
diff --git a/src/virtio-ring.h b/src/virtio-ring.h
index b7a7aaf..fd30778 100644
--- a/src/virtio-ring.h
+++ b/src/virtio-ring.h
@@ -4,7 +4,7 @@
#include "types.h" // u64
#include "memmap.h" // PAGE_SIZE
-#define PAGE_SHIFT 12
+
#define PAGE_MASK (PAGE_SIZE-1)
#define virt_to_phys(v) (unsigned long)(v)
--
1.7.4.1
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