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 */