[S390] add mini sclp driver

[linux-block.git] / arch / s390 / kernel / head.S

diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index bf8cf1caeffcc58e8a7c72ae711d9d15a5144186..6d227413cbe77cf111dd088357f71cb6762fb56c 100644 (file)
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -1,7 +1,5 @@
 /*
- *  arch/s390/kernel/head.S
- *
- * Copyright (C) IBM Corp. 1999,2006
+ * Copyright IBM Corp. 1999,2009
  *
  *    Author(s): Hartmut Penner <hp@de.ibm.com>
  *              Martin Schwidefsky <schwidefsky@de.ibm.com>
@@ -494,7 +492,19 @@ startup:basr       %r13,0                  # get base
        n       %r0,2f+12-.LPG0(%r13)
        cl      %r0,2f+12-.LPG0(%r13)
        je      3f
-1:     lpsw    2f-.LPG0(13)            # machine type not good enough, crash
+1:     l       %r15,.Lstack-.LPG0(%r13)
+       ahi     %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union+THREAD_SIZE
+       ahi     %r15,-96
+       la      %r2,.Lals_string-.LPG0(%r13)
+       l       %r3,.Lsclp_print-.LPG0(%r13)
+       basr    %r14,%r3
+       lpsw    2f-.LPG0(%r13)          # machine type not good enough, crash
+.Lals_string:
+       .asciz  "The Linux kernel requires more recent processor hardware"
+.Lsclp_print:
+       .long   _sclp_print_early
+.Lstack:
+       .long   init_thread_union
        .align 16
 2:     .long   0x000a0000,0x8badcccc
 #if defined(CONFIG_64BIT)