/* thread_info.h: CRIS low-level thread information
   *
   * Copyright (C) 2002  David Howells (dhowells@redhat.com)
   * - Incorporating suggestions made by Linus Torvalds and Dave Miller
   * 
   * CRIS port by Axis Communications
   */
  
  #ifndef _ASM_THREAD_INFO_H
  #define _ASM_THREAD_INFO_H
  
  #ifdef __KERNEL__
  
  #ifndef __ASSEMBLY__
  #include <asm/types.h>
  #include <asm/processor.h>

  #include <arch/thread_info.h>

  #include <asm/segment.h>
  #endif
  
  
  /*
   * 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
   */
  #ifndef __ASSEMBLY__
  struct thread_info {
  	struct task_struct	*task;		/* main task structure */
  	struct exec_domain	*exec_domain;	/* execution domain */
  	unsigned long		flags;		/* low level flags */
  	__u32			cpu;		/* current CPU */

  	int			preempt_count;	/* 0 => preemptable, <0 => BUG */

  	__u32			tls;		/* TLS for this thread */

  
  	mm_segment_t		addr_limit;	/* thread address space:
  					 	   0-0xBFFFFFFF for user-thead
  						   0-0xFFFFFFFF for kernel-thread
  						*/
  	struct restart_block    restart_block;
  	__u8			supervisor_stack[0];
  };
  
  #endif

  #define PREEMPT_ACTIVE		0x10000000

  
  /*
   * macros/functions for gaining access to the thread information structure

   */
  #ifndef __ASSEMBLY__
  #define INIT_THREAD_INFO(tsk)				\
  {							\
  	.task		= &tsk,				\
  	.exec_domain	= &default_exec_domain,		\
  	.flags		= 0,				\
  	.cpu		= 0,				\

  	.preempt_count	= INIT_PREEMPT_COUNT,		\

  	.addr_limit	= KERNEL_DS,			\
  	.restart_block = {				\
  		       .fn = do_no_restart_syscall,	\
  	},						\
  }
  
  #define init_thread_info	(init_thread_union.thread_info)

  #define __HAVE_ARCH_THREAD_INFO_ALLOCATOR

  /* thread information allocation */

  #define alloc_thread_info_node(tsk, node)	\
  	((struct thread_info *) __get_free_pages(GFP_KERNEL, 1))

  #define free_thread_info(ti) free_pages((unsigned long) (ti), 1)

  
  #endif /* !__ASSEMBLY__ */
  
  /*
   * thread information flags
   * - these are process state flags that various assembly files may need to access
   * - pending work-to-be-done flags are in LSW
   * - other flags in MSW
   */
  #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_RESTORE_SIGMASK	9	/* restore signal mask in do_signal() */

  #define TIF_POLLING_NRFLAG	16	/* true if poll_idle() is polling TIF_NEED_RESCHED */

  #define TIF_MEMDIE		17	/* is terminating due to OOM killer */

  
  #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_RESTORE_SIGMASK	(1<<TIF_RESTORE_SIGMASK)

  #define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
  
  #define _TIF_WORK_MASK		0x0000FFFE	/* work to do on interrupt/exception return */
  #define _TIF_ALLWORK_MASK	0x0000FFFF	/* work to do on any return to u-space */
  
  #endif /* __KERNEL__ */
  
  #endif /* _ASM_THREAD_INFO_H */