[Xen-ia64-devel] [rfc 4/6] Kexec: offsets for EFI runtime regions

[Simon Horman <horms@xxxxxxxxxxxx>]

This is used by paches that move the EFI runtime regions into what is
normally guest space.  A description of why this mapping is made is
included in the patch that makes the mapping.

Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>


Index: xen-unstable.hg/xen/include/asm-ia64/xensystem.h
===================================================================
--- xen-unstable.hg.orig/xen/include/asm-ia64/xensystem.h       2007-08-09 
10:14:52.000000000 +0900
+++ xen-unstable.hg/xen/include/asm-ia64/xensystem.h    2007-08-09 
10:21:14.000000000 +0900
@@ -33,6 +33,12 @@
 #define KERNEL_START            0xf000000004000000
 #define GATE_ADDR               KERNEL_START
 
+/* In order for Kexec between Xen and Linux to work EFI needs
+ * to be mapped into the same place by both. It seems most convenient
+ * to make Xen do the dirty work here */
+#define __IA64_EFI_UNCACHED_OFFSET     0xc000000000000000UL
+#define __IA64_EFI_CACHED_OFFSET       0xf000000000000000UL
+
 #define IS_VMM_ADDRESS(addr) ((((addr) >> 60) ^ ((addr) >> 59)) & 1)
 
 #endif // _ASM_IA64_XENSYSTEM_H

-- 

-- 
Horms
  H: http://www.vergenet.net/~horms/
  W: http://www.valinux.co.jp/en/


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