1 files changed, 48 insertions, 0 deletions

diff --git a/arch/s390/kernel/reset.S b/arch/s390/kernel/reset.S
new file mode 100644
index 000000000000..be8688c0665c
--- /dev/null
+++ b/arch/s390/kernel/reset.S
@@ -0,0 +1,48 @@
+/*
+ *  arch/s390/kernel/reset.S
+ *
+ *    Copyright (C) IBM Corp. 2006
+ *    Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
+ */
+
+#include <asm/ptrace.h>
+#include <asm/lowcore.h>
+
+#ifdef CONFIG_64BIT
+
+        .globl  reset_mcck_handler
+reset_mcck_handler:
+        basr    %r13,0
+0:      lg      %r15,__LC_PANIC_STACK   # load panic stack
+        aghi    %r15,-STACK_FRAME_OVERHEAD
+        lg      %r1,s390_reset_mcck_handler-0b(%r13)
+        ltgr    %r1,%r1
+        jz      1f
+        basr    %r14,%r1
+1:      la      %r1,4095
+        lmg     %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)
+        lpswe   __LC_MCK_OLD_PSW
+
+        .globl  s390_reset_mcck_handler
+s390_reset_mcck_handler:
+        .quad   0
+
+#else /* CONFIG_64BIT */
+
+        .globl  reset_mcck_handler
+reset_mcck_handler:
+        basr    %r13,0
+0:      l       %r15,__LC_PANIC_STACK   # load panic stack
+        ahi     %r15,-STACK_FRAME_OVERHEAD
+        l       %r1,s390_reset_mcck_handler-0b(%r13)
+        ltr     %r1,%r1
+        jz      1f
+        basr    %r14,%r1
+1:      lm      %r0,%r15,__LC_GPREGS_SAVE_AREA
+        lpsw    __LC_MCK_OLD_PSW
+
+        .globl  s390_reset_mcck_handler
+s390_reset_mcck_handler:
+        .long   0
+
+#endif /* CONFIG_64BIT */