[S390] Move memory detection code to own file.

Move memory detection code to own file and also simplify it.
Also add an interface which can be called at any time to get the
current memory layout. This interface is needed by our kernel
internal system dumper.

Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Cc: Michael Holzheu <holzheu@de.ibm.com>
Cc: Frank Munzert <munzert@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/include/asm-s390/setup.h b/include/asm-s390/setup.h
index f5eebc48d98d..80747ba6ef8a 100644
--- a/include/asm-s390/setup.h
+++ b/include/asm-s390/setup.h
@@ -17,7 +17,7 @@
 #include <asm/types.h>
 
 #define PARMAREA                0x10400
-#define MEMORY_CHUNKS           16      /* max 0x7fff */
+#define MEMORY_CHUNKS           256
 
 #ifndef __ASSEMBLY__
 
@@ -38,12 +38,14 @@
 struct mem_chunk {
         unsigned long addr;
         unsigned long size;
-        unsigned long type;
+        int type;
 };
 
 extern struct mem_chunk memory_chunk[];
 extern unsigned long real_memory_size;
 
+void detect_memory_layout(struct mem_chunk chunk[]);
+
 #ifdef CONFIG_S390_SWITCH_AMODE
 extern unsigned int switch_amode;
 #else