[S390] boot from NSS support

Add support to boot from a named saved segment (NSS).

Signed-off-by: Hongjie Yang <hongjie@us.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/include/asm-s390/setup.h b/include/asm-s390/setup.h
index 6b68ddda39a7..3388bb52597c 100644
--- a/include/asm-s390/setup.h
+++ b/include/asm-s390/setup.h
@@ -156,13 +156,19 @@ struct ipl_parameter_block {
 extern u32 ipl_flags;
 extern u16 ipl_devno;
 
-void do_reipl(void);
+extern void do_reipl(void);
+extern void ipl_save_parameters(void);
 
 enum {
         IPL_DEVNO_VALID = 1,
         IPL_PARMBLOCK_VALID = 2,
+        IPL_NSS_VALID = 4,
 };
 
+#define NSS_NAME_SIZE   8
+
+extern char kernel_nss_name[];
+
 #define IPL_PARMBLOCK_START     ((struct ipl_parameter_block *) \
                                  IPL_PARMBLOCK_ORIGIN)
 #define IPL_PARMBLOCK_SIZE      (IPL_PARMBLOCK_START->hdr.len)