diff --git a/include/asm-s390/debug.h b/include/asm-s390/debug.h
new file mode 100644
index 0000000..28ef235
--- /dev/null
+++ b/include/asm-s390/debug.h
@@ -0,0 +1,249 @@
+/*
+ *  include/asm-s390/debug.h
+ *   S/390 debug facility
+ *
+ *    Copyright (C) 1999, 2000 IBM Deutschland Entwicklung GmbH,
+ *                             IBM Corporation
+ */
+
+#ifndef DEBUG_H
+#define DEBUG_H
+
+#include <linux/string.h>
+
+/* Note:
+ * struct __debug_entry must be defined outside of #ifdef __KERNEL__ 
+ * in order to allow a user program to analyze the 'raw'-view.
+ */
+
+struct __debug_entry{
+        union {
+                struct {
+                        unsigned long long clock:52;
+                        unsigned long long exception:1;
+                        unsigned long long level:3;
+                        unsigned long long cpuid:8;
+                } fields;
+
+                unsigned long long stck;
+        } id;
+        void* caller;
+} __attribute__((packed));
+
+
+#define __DEBUG_FEATURE_VERSION      1  /* version of debug feature */
+
+#ifdef __KERNEL__
+#include <linux/spinlock.h>
+#include <linux/kernel.h>
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+
+#define DEBUG_MAX_LEVEL            6  /* debug levels range from 0 to 6 */
+#define DEBUG_OFF_LEVEL            -1 /* level where debug is switched off */
+#define DEBUG_FLUSH_ALL            -1 /* parameter to flush all areas */
+#define DEBUG_MAX_VIEWS            10 /* max number of views in proc fs */
+#define DEBUG_MAX_PROCF_LEN        16 /* max length for a proc file name */
+#define DEBUG_DEFAULT_LEVEL        3  /* initial debug level */
+
+#define DEBUG_DIR_ROOT "s390dbf" /* name of debug root directory in proc fs */
+
+#define DEBUG_DATA(entry) (char*)(entry + 1) /* data is stored behind */
+                                             /* the entry information */
+
+#define STCK(x)	asm volatile ("STCK 0(%1)" : "=m" (x) : "a" (&(x)) : "cc")
+
+typedef struct __debug_entry debug_entry_t;
+
+struct debug_view;
+
+typedef struct debug_info {	
+	struct debug_info* next;
+	struct debug_info* prev;
+	atomic_t ref_count;
+	spinlock_t lock;			
+	int level;
+	int nr_areas;
+	int page_order;
+	int buf_size;
+	int entry_size;	
+	debug_entry_t** areas;
+	int active_area;
+	int *active_entry;
+	struct proc_dir_entry* proc_root_entry;
+	struct proc_dir_entry* proc_entries[DEBUG_MAX_VIEWS];
+	struct debug_view* views[DEBUG_MAX_VIEWS];	
+	char name[DEBUG_MAX_PROCF_LEN];
+} debug_info_t;
+
+typedef int (debug_header_proc_t) (debug_info_t* id,
+				   struct debug_view* view,
+				   int area,
+				   debug_entry_t* entry,
+				   char* out_buf);
+
+typedef int (debug_format_proc_t) (debug_info_t* id,
+				   struct debug_view* view, char* out_buf,
+				   const char* in_buf);
+typedef int (debug_prolog_proc_t) (debug_info_t* id,
+				   struct debug_view* view,
+				   char* out_buf);
+typedef int (debug_input_proc_t) (debug_info_t* id,
+				  struct debug_view* view,
+				  struct file* file,
+				  const char __user *user_buf,
+				  size_t in_buf_size, loff_t* offset);
+
+int debug_dflt_header_fn(debug_info_t* id, struct debug_view* view,
+		         int area, debug_entry_t* entry, char* out_buf);						
+				
+struct debug_view {
+	char name[DEBUG_MAX_PROCF_LEN];
+	debug_prolog_proc_t* prolog_proc;
+	debug_header_proc_t* header_proc;
+	debug_format_proc_t* format_proc;
+	debug_input_proc_t*  input_proc;
+	void*                private_data;
+};
+
+extern struct debug_view debug_hex_ascii_view;
+extern struct debug_view debug_raw_view;
+extern struct debug_view debug_sprintf_view;
+
+/* do NOT use the _common functions */
+
+debug_entry_t* debug_event_common(debug_info_t* id, int level, 
+                                  const void* data, int length);
+
+debug_entry_t* debug_exception_common(debug_info_t* id, int level, 
+                                      const void* data, int length);
+
+/* Debug Feature API: */
+
+debug_info_t* debug_register(char* name, int pages_index, int nr_areas,
+                             int buf_size);
+
+void debug_unregister(debug_info_t* id);
+
+void debug_set_level(debug_info_t* id, int new_level);
+
+void debug_stop_all(void);
+
+extern inline debug_entry_t* 
+debug_event(debug_info_t* id, int level, void* data, int length)
+{
+	if ((!id) || (level > id->level)) return NULL;
+        return debug_event_common(id,level,data,length);
+}
+
+extern inline debug_entry_t* 
+debug_int_event(debug_info_t* id, int level, unsigned int tag)
+{
+        unsigned int t=tag;
+	if ((!id) || (level > id->level)) return NULL;
+        return debug_event_common(id,level,&t,sizeof(unsigned int));
+}
+
+extern inline debug_entry_t *
+debug_long_event (debug_info_t* id, int level, unsigned long tag)
+{
+        unsigned long t=tag;
+	if ((!id) || (level > id->level)) return NULL;
+        return debug_event_common(id,level,&t,sizeof(unsigned long));
+}
+
+extern inline debug_entry_t* 
+debug_text_event(debug_info_t* id, int level, const char* txt)
+{
+	if ((!id) || (level > id->level)) return NULL;
+        return debug_event_common(id,level,txt,strlen(txt));
+}
+
+extern debug_entry_t *
+debug_sprintf_event(debug_info_t* id,int level,char *string,...)
+	__attribute__ ((format(printf, 3, 4)));
+
+
+extern inline debug_entry_t* 
+debug_exception(debug_info_t* id, int level, void* data, int length)
+{
+	if ((!id) || (level > id->level)) return NULL;
+        return debug_exception_common(id,level,data,length);
+}
+
+extern inline debug_entry_t* 
+debug_int_exception(debug_info_t* id, int level, unsigned int tag)
+{
+        unsigned int t=tag;
+	if ((!id) || (level > id->level)) return NULL;
+        return debug_exception_common(id,level,&t,sizeof(unsigned int));
+}
+
+extern inline debug_entry_t * 
+debug_long_exception (debug_info_t* id, int level, unsigned long tag)
+{
+        unsigned long t=tag;
+	if ((!id) || (level > id->level)) return NULL;
+        return debug_exception_common(id,level,&t,sizeof(unsigned long));
+}
+
+extern inline debug_entry_t* 
+debug_text_exception(debug_info_t* id, int level, const char* txt)
+{
+	if ((!id) || (level > id->level)) return NULL;
+        return debug_exception_common(id,level,txt,strlen(txt));
+}
+
+
+extern debug_entry_t *
+debug_sprintf_exception(debug_info_t* id,int level,char *string,...)
+	__attribute__ ((format(printf, 3, 4)));
+
+int debug_register_view(debug_info_t* id, struct debug_view* view);
+int debug_unregister_view(debug_info_t* id, struct debug_view* view);
+
+/*
+   define the debug levels:
+   - 0 No debugging output to console or syslog
+   - 1 Log internal errors to syslog, ignore check conditions 
+   - 2 Log internal errors and check conditions to syslog
+   - 3 Log internal errors to console, log check conditions to syslog
+   - 4 Log internal errors and check conditions to console
+   - 5 panic on internal errors, log check conditions to console
+   - 6 panic on both, internal errors and check conditions
+ */
+
+#ifndef DEBUG_LEVEL
+#define DEBUG_LEVEL 4
+#endif
+
+#define INTERNAL_ERRMSG(x,y...) "E" __FILE__ "%d: " x, __LINE__, y
+#define INTERNAL_WRNMSG(x,y...) "W" __FILE__ "%d: " x, __LINE__, y
+#define INTERNAL_INFMSG(x,y...) "I" __FILE__ "%d: " x, __LINE__, y
+#define INTERNAL_DEBMSG(x,y...) "D" __FILE__ "%d: " x, __LINE__, y
+
+#if DEBUG_LEVEL > 0
+#define PRINT_DEBUG(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
+#define PRINT_INFO(x...) printk ( KERN_INFO PRINTK_HEADER x )
+#define PRINT_WARN(x...) printk ( KERN_WARNING PRINTK_HEADER x )
+#define PRINT_ERR(x...) printk ( KERN_ERR PRINTK_HEADER x )
+#define PRINT_FATAL(x...) panic ( PRINTK_HEADER x )
+#else
+#define PRINT_DEBUG(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
+#define PRINT_INFO(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
+#define PRINT_WARN(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
+#define PRINT_ERR(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
+#define PRINT_FATAL(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
+#endif				/* DASD_DEBUG */
+
+#undef DEBUG_MALLOC
+#ifdef DEBUG_MALLOC
+void *b;
+#define kmalloc(x...) (PRINT_INFO(" kmalloc %p\n",b=kmalloc(x)),b)
+#define kfree(x) PRINT_INFO(" kfree %p\n",x);kfree(x)
+#define get_zeroed_page(x...) (PRINT_INFO(" gfp %p\n",b=get_zeroed_page(x)),b)
+#define __get_free_pages(x...) (PRINT_INFO(" gfps %p\n",b=__get_free_pages(x)),b)
+#endif				/* DEBUG_MALLOC */
+
+#endif				/* __KERNEL__ */
+#endif				/* DEBUG_H */