1 files changed, 98 insertions, 0 deletions
diff --git a/include/asm-alpha/thread_info.h b/include/asm-alpha/thread_info.h
new file mode 100644
index 000000000000..d51491ed00b8
--- /dev/null
+++ b/include/asm-alpha/thread_info.h
@@ -0,0 +1,98 @@
+#ifndef _ALPHA_THREAD_INFO_H
+#define _ALPHA_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+#include <asm/processor.h>
+#include <asm/types.h>
+#include <asm/hwrpb.h>
+#endif
+
+#ifndef __ASSEMBLY__
+struct thread_info {
+	struct pcb_struct	pcb;		/* palcode state */
+
+	struct task_struct	*task;		/* main task structure */
+	unsigned int		flags;		/* low level flags */
+	unsigned int		ieee_state;	/* see fpu.h */
+
+	struct exec_domain	*exec_domain;	/* execution domain */
+	mm_segment_t		addr_limit;	/* thread address space */
+	unsigned		cpu;		/* current CPU */
+	int			preempt_count; /* 0 => preemptable, <0 => BUG */
+
+	int bpt_nsaved;
+	unsigned long bpt_addr[2];		/* breakpoint handling  */
+	unsigned int bpt_insn[2];
+
+	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,	\
+	.addr_limit	= KERNEL_DS,		\
+	.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.  */
+register struct thread_info *__current_thread_info __asm__("$8");
+#define current_thread_info()  __current_thread_info
+
+/* Thread information allocation.  */
+#define THREAD_SIZE (2*PAGE_SIZE)
+#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__ */
+
+#define PREEMPT_ACTIVE		0x40000000
+
+/*
+ * Thread information flags:
+ * - these are process state flags and used from assembly
+ * - pending work-to-be-done flags come first to fit in and immediate operand.
+ *
+ * TIF_SYSCALL_TRACE is known to be 0 via blbs.
+ */
+#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	/* poll_idle is polling NEED_RESCHED */
+#define TIF_DIE_IF_KERNEL	5	/* dik recursion lock */
+#define TIF_UAC_NOPRINT		6	/* see sysinfo.h */
+#define TIF_UAC_NOFIX		7
+#define TIF_UAC_SIGBUS		8
+#define TIF_MEMDIE		9
+
+#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)
+
+/* Work to do on interrupt/exception return.  */
+#define _TIF_WORK_MASK		(_TIF_NOTIFY_RESUME	\
+				 | _TIF_SIGPENDING	\
+				 | _TIF_NEED_RESCHED)
+
+/* Work to do on any return to userspace.  */
+#define _TIF_ALLWORK_MASK	(_TIF_WORK_MASK		\
+				 | _TIF_SYSCALL_TRACE)
+
+#endif /* __KERNEL__ */
+#endif /* _ALPHA_THREAD_INFO_H */