1 files changed, 120 insertions, 0 deletions

diff --git a/include/asm-s390/thread_info.h b/include/asm-s390/thread_info.h
new file mode 100644
index 000000000000..aade85c53a63
--- /dev/null
+++ b/include/asm-s390/thread_info.h
@@ -0,0 +1,120 @@
+/*
+ *  include/asm-s390/thread_info.h
+ *
+ *  S390 version
+ *    Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
+ */
+
+#ifndef _ASM_THREAD_INFO_H
+#define _ASM_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+/*
+ * Size of kernel stack for each process
+ */
+#ifndef __s390x__
+#ifndef __SMALL_STACK
+#define THREAD_ORDER 1
+#define ASYNC_ORDER  1
+#else
+#define THREAD_ORDER 0
+#define ASYNC_ORDER  0
+#endif
+#else /* __s390x__ */
+#ifndef __SMALL_STACK
+#define THREAD_ORDER 2
+#define ASYNC_ORDER  2
+#else
+#define THREAD_ORDER 1
+#define ASYNC_ORDER  1
+#endif
+#endif /* __s390x__ */
+
+#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
+#define ASYNC_SIZE  (PAGE_SIZE << ASYNC_ORDER)
+
+#ifndef __ASSEMBLY__
+#include <asm/processor.h>
+#include <asm/lowcore.h>
+
+/*
+ * low level task data that entry.S needs immediate access to
+ * - this struct should fit entirely inside of one cache line
+ * - this struct shares the supervisor stack pages
+ * - if the contents of this structure are changed, the assembly constants must also be changed
+ */
+struct thread_info {
+        struct task_struct      *task;          /* main task structure */
+        struct exec_domain      *exec_domain;   /* execution domain */
+        unsigned long           flags;          /* low level flags */
+        unsigned int            cpu;            /* current CPU */
+        unsigned int            preempt_count; /* 0 => preemptable */
+        struct restart_block    restart_block;
+};
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ */
+#define INIT_THREAD_INFO(tsk)                   \
+{                                               \
+        .task           = &tsk,                 \
+        .exec_domain    = &default_exec_domain, \
+        .flags          = 0,                    \
+        .cpu            = 0,                    \
+        .restart_block  = {                     \
+                .fn = do_no_restart_syscall,    \
+        },                                      \
+}
+
+#define init_thread_info        (init_thread_union.thread_info)
+#define init_stack              (init_thread_union.stack)
+
+/* how to get the thread information struct from C */
+static inline struct thread_info *current_thread_info(void)
+{
+        return (struct thread_info *)((*(unsigned long *) __LC_KERNEL_STACK)-THREAD_SIZE);
+}
+
+/* thread information allocation */
+#define alloc_thread_info(tsk) ((struct thread_info *) \
+        __get_free_pages(GFP_KERNEL,THREAD_ORDER))
+#define free_thread_info(ti) free_pages((unsigned long) (ti),THREAD_ORDER)
+#define get_thread_info(ti) get_task_struct((ti)->task)
+#define put_thread_info(ti) put_task_struct((ti)->task)
+
+#endif
+
+/*
+ * thread information flags bit numbers
+ */
+#define TIF_SYSCALL_TRACE       0       /* syscall trace active */
+#define TIF_NOTIFY_RESUME       1       /* resumption notification requested */
+#define TIF_SIGPENDING          2       /* signal pending */
+#define TIF_NEED_RESCHED        3       /* rescheduling necessary */
+#define TIF_RESTART_SVC         4       /* restart svc with new svc number */
+#define TIF_SYSCALL_AUDIT       5       /* syscall auditing active */
+#define TIF_SINGLE_STEP         6       /* deliver sigtrap on return to user */
+#define TIF_USEDFPU             16      /* FPU was used by this task this quantum (SMP) */
+#define TIF_POLLING_NRFLAG      17      /* true if poll_idle() is polling 
+                                           TIF_NEED_RESCHED */
+#define TIF_31BIT               18      /* 32bit process */ 
+#define TIF_MEMDIE              19
+
+#define _TIF_SYSCALL_TRACE      (1<<TIF_SYSCALL_TRACE)
+#define _TIF_NOTIFY_RESUME      (1<<TIF_NOTIFY_RESUME)
+#define _TIF_SIGPENDING         (1<<TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED       (1<<TIF_NEED_RESCHED)
+#define _TIF_RESTART_SVC        (1<<TIF_RESTART_SVC)
+#define _TIF_SYSCALL_AUDIT      (1<<TIF_SYSCALL_AUDIT)
+#define _TIF_SINGLE_STEP        (1<<TIF_SINGLE_STEP)
+#define _TIF_USEDFPU            (1<<TIF_USEDFPU)
+#define _TIF_POLLING_NRFLAG     (1<<TIF_POLLING_NRFLAG)
+#define _TIF_31BIT              (1<<TIF_31BIT)
+
+#endif /* __KERNEL__ */
+
+#define PREEMPT_ACTIVE          0x4000000
+
+#endif /* _ASM_THREAD_INFO_H */