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-rw-r--r--kernel/arch/s390/include/asm/thread_info.h99
1 files changed, 99 insertions, 0 deletions
diff --git a/kernel/arch/s390/include/asm/thread_info.h b/kernel/arch/s390/include/asm/thread_info.h
new file mode 100644
index 000000000..4c27ec764
--- /dev/null
+++ b/kernel/arch/s390/include/asm/thread_info.h
@@ -0,0 +1,99 @@
+/*
+ * S390 version
+ * Copyright IBM Corp. 2002, 2006
+ * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
+ */
+
+#ifndef _ASM_THREAD_INFO_H
+#define _ASM_THREAD_INFO_H
+
+/*
+ * Size of kernel stack for each process
+ */
+#define THREAD_ORDER 2
+#define ASYNC_ORDER 2
+
+#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
+#define ASYNC_SIZE (PAGE_SIZE << ASYNC_ORDER)
+
+#ifndef __ASSEMBLY__
+#include <asm/lowcore.h>
+#include <asm/page.h>
+#include <asm/processor.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 */
+ unsigned long flags; /* low level flags */
+ unsigned long sys_call_table; /* System call table address */
+ unsigned int cpu; /* current CPU */
+ int preempt_count; /* 0 => preemptable, <0 => BUG */
+ unsigned int system_call;
+ __u64 user_timer;
+ __u64 system_timer;
+ unsigned long last_break; /* last breaking-event-address. */
+};
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ */
+#define INIT_THREAD_INFO(tsk) \
+{ \
+ .task = &tsk, \
+ .flags = 0, \
+ .cpu = 0, \
+ .preempt_count = INIT_PREEMPT_COUNT, \
+}
+
+#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 *) S390_lowcore.thread_info;
+}
+
+void arch_release_task_struct(struct task_struct *tsk);
+
+#define THREAD_SIZE_ORDER THREAD_ORDER
+
+#endif
+
+/*
+ * thread information flags bit numbers
+ */
+#define TIF_NOTIFY_RESUME 0 /* callback before returning to user */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_SYSCALL_TRACE 3 /* syscall trace active */
+#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
+#define TIF_SECCOMP 5 /* secure computing */
+#define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */
+#define TIF_UPROBE 7 /* breakpointed or single-stepping */
+#define TIF_31BIT 16 /* 32bit process */
+#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
+#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */
+#define TIF_SINGLE_STEP 19 /* This task is single stepped */
+#define TIF_BLOCK_STEP 20 /* This task is block stepped */
+#define TIF_UPROBE_SINGLESTEP 21 /* This task is uprobe single stepped */
+
+#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
+#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
+#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
+#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
+#define _TIF_SECCOMP (1<<TIF_SECCOMP)
+#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
+#define _TIF_UPROBE (1<<TIF_UPROBE)
+#define _TIF_31BIT (1<<TIF_31BIT)
+#define _TIF_SINGLE_STEP (1<<TIF_SINGLE_STEP)
+
+#define is_32bit_task() (test_thread_flag(TIF_31BIT))
+
+#endif /* _ASM_THREAD_INFO_H */