1 files changed, 99 insertions, 0 deletions

diff --git a/include/asm-ppc/thread_info.h b/include/asm-ppc/thread_info.h
new file mode 100644
index 000000000000..f7f01524e8a8
--- /dev/null
+++ b/include/asm-ppc/thread_info.h
@@ -0,0 +1,99 @@
+/* thread_info.h: PPC low-level thread information
+ * adapted from the i386 version by Paul Mackerras
+ *
+ * Copyright (C) 2002  David Howells (dhowells@redhat.com)
+ * - Incorporating suggestions made by Linus Torvalds and Dave Miller
+ */
+
+#ifndef _ASM_THREAD_INFO_H
+#define _ASM_THREAD_INFO_H
+
+#ifdef __KERNEL__
+#ifndef __ASSEMBLY__
+/*
+ * low level task data.
+ * If you change this, change the TI_* offsets below to match.
+ */
+struct thread_info {
+        struct task_struct      *task;          /* main task structure */
+        struct exec_domain      *exec_domain;   /* execution domain */
+        unsigned long           flags;          /* low level flags */
+        unsigned long           local_flags;    /* non-racy flags */
+        int                     cpu;            /* cpu we're on */
+        int                     preempt_count;
+        struct restart_block    restart_block;
+};
+
+#define INIT_THREAD_INFO(tsk)                   \
+{                                               \
+        .task =         &tsk,                   \
+        .exec_domain =  &default_exec_domain,   \
+        .flags =        0,                      \
+        .local_flags =  0,                      \
+        .cpu =          0,                      \
+        .preempt_count = 1,                     \
+        .restart_block = {                      \
+                .fn = do_no_restart_syscall,    \
+        },                                      \
+}
+
+#define init_thread_info        (init_thread_union.thread_info)
+#define init_stack              (init_thread_union.stack)
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ */
+
+/* how to get the thread information struct from C */
+static inline struct thread_info *current_thread_info(void)
+{
+        struct thread_info *ti;
+        __asm__("rlwinm %0,1,0,0,18" : "=r"(ti));
+        return ti;
+}
+
+/* thread information allocation */
+#define alloc_thread_info(tsk) ((struct thread_info *) \
+                                __get_free_pages(GFP_KERNEL, 1))
+#define free_thread_info(ti)    free_pages((unsigned long) (ti), 1)
+#define get_thread_info(ti)     get_task_struct((ti)->task)
+#define put_thread_info(ti)     put_task_struct((ti)->task)
+#endif /* __ASSEMBLY__ */
+
+/*
+ * Size of kernel stack for each process.
+ */
+#define THREAD_SIZE             8192    /* 2 pages */
+
+#define PREEMPT_ACTIVE          0x10000000
+
+/*
+ * thread information flag 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_POLLING_NRFLAG      4       /* true if poll_idle() is polling
+                                           TIF_NEED_RESCHED */
+#define TIF_MEMDIE              5
+/* as above, but as bit values */
+#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_POLLING_NRFLAG     (1<<TIF_POLLING_NRFLAG)
+
+/*
+ * Non racy (local) flags bit numbers
+ */
+#define TIFL_FORCE_NOERROR      0       /* don't return error from current
+                                           syscall even if result < 0 */
+
+/* as above, but as bit values */
+#define _TIFL_FORCE_NOERROR     (1<<TIFL_FORCE_NOERROR)
+
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_THREAD_INFO_H */