[deliverable/linux.git] / include / asm-m68k / thread_info.h

#ifndef _ASM_M68K_THREAD_INFO_H
#define _ASM_M68K_THREAD_INFO_H

#include <asm/types.h>
#include <asm/page.h>

struct thread_info {
	struct task_struct	*task;		/* main task structure */
	unsigned long		flags;
	struct exec_domain	*exec_domain;	/* execution domain */
	int			preempt_count;	/* 0 => preemptable, <0 => BUG */
	__u32 cpu; /* should always be 0 on m68k */
	struct restart_block    restart_block;
};

#define PREEMPT_ACTIVE		0x4000000

#define INIT_THREAD_INFO(tsk)			\
{						\
	.task		= &tsk,			\
	.exec_domain	= &default_exec_domain,	\
	.restart_block = {			\
		.fn = do_no_restart_syscall,	\
	},					\
}

/* THREAD_SIZE should be 8k, so handle differently for 4k and 8k machines */
#if PAGE_SHIFT == 13 /* 8k machines */
#define alloc_thread_info(tsk)   ((struct thread_info *)__get_free_pages(GFP_KERNEL,0))
#define free_thread_info(ti)  free_pages((unsigned long)(ti),0)
#else /* otherwise assume 4k pages */
#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)
#endif /* PAGE_SHIFT == 13 */

#define init_thread_info	(init_task.thread.info)
#define init_stack		(init_thread_union.stack)

#define task_thread_info(tsk)	(&(tsk)->thread.info)
#define task_stack_page(tsk)	((tsk)->stack)
#define current_thread_info()	task_thread_info(current)

#define __HAVE_THREAD_FUNCTIONS

#define setup_thread_stack(p, org) ({			\
	*(struct task_struct **)(p)->stack = (p);	\
	task_thread_info(p)->task = (p);		\
})

#define end_of_stack(p) ((unsigned long *)(p)->stack + 1)

/* entry.S relies on these definitions!
 * bits 0-7 are tested at every exception exit
 * bits 8-15 are also tested at syscall exit
 */
#define TIF_SIGPENDING		6	/* signal pending */
#define TIF_NEED_RESCHED	7	/* rescheduling necessary */
#define TIF_DELAYED_TRACE	14	/* single step a syscall */
#define TIF_SYSCALL_TRACE	15	/* syscall trace active */
#define TIF_MEMDIE		16

#endif	/* _ASM_M68K_THREAD_INFO_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _ASM_M68K_THREAD_INFO_H
	2	#define _ASM_M68K_THREAD_INFO_H
	3
	4	#include <asm/types.h>
1da177e4 LT	5	#include <asm/page.h>
	6
	7	struct thread_info {
	8	struct task_struct task; / main task structure */
3b66a1ed	9	unsigned long flags;
1da177e4	10	struct exec_domain exec_domain; / execution domain */
dcd497f9	11	int preempt_count; /* 0 => preemptable, <0 => BUG */
1da177e4 LT	12	__u32 cpu; /* should always be 0 on m68k */
1da177e4 LT	13	struct restart_block restart_block;
1da177e4 LT	14	};
	15
	16	#define PREEMPT_ACTIVE 0x4000000
	17
	18	#define INIT_THREAD_INFO(tsk) \
	19	{ \
	20	.task = &tsk, \
	21	.exec_domain = &default_exec_domain, \
	22	.restart_block = { \
	23	.fn = do_no_restart_syscall, \
	24	}, \
	25	}
	26
	27	/* THREAD_SIZE should be 8k, so handle differently for 4k and 8k machines */
	28	#if PAGE_SHIFT == 13 /* 8k machines */
	29	#define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,0))
	30	#define free_thread_info(ti) free_pages((unsigned long)(ti),0)
	31	#else /* otherwise assume 4k pages */
	32	#define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,1))
	33	#define free_thread_info(ti) free_pages((unsigned long)(ti),1)
	34	#endif /* PAGE_SHIFT == 13 */
	35
abd03753	36	#define init_thread_info (init_task.thread.info)
1da177e4 LT	37	#define init_stack (init_thread_union.stack)
1da177e4 LT	38
abd03753	39	#define task_thread_info(tsk) (&(tsk)->thread.info)
f7e4217b	40	#define task_stack_page(tsk) ((tsk)->stack)
abd03753	41	#define current_thread_info() task_thread_info(current)
1da177e4 LT	42
	43	#define __HAVE_THREAD_FUNCTIONS
	44
abd03753	45	#define setup_thread_stack(p, org) ({ \
f7e4217b	46	(struct task_struct *)(p)->stack = (p); \
abd03753 AV	47	task_thread_info(p)->task = (p); \
	48	})
	49
f7e4217b	50	#define end_of_stack(p) ((unsigned long *)(p)->stack + 1)
abd03753	51
3b66a1ed RZ	52	/* entry.S relies on these definitions!
	53	* bits 0-7 are tested at every exception exit
	54	* bits 8-15 are also tested at syscall exit
1da177e4	55	*/
3b66a1ed RZ	56	#define TIF_SIGPENDING 6 /* signal pending */
	57	#define TIF_NEED_RESCHED 7 /* rescheduling necessary */
	58	#define TIF_DELAYED_TRACE 14 /* single step a syscall */
	59	#define TIF_SYSCALL_TRACE 15 /* syscall trace active */
	60	#define TIF_MEMDIE 16
1da177e4 LT	61
1da177e4 LT	62	#endif /* _ASM_M68K_THREAD_INFO_H */