[deliverable/linux.git] / include / asm-avr32 / thread_info.h

/*
 * Copyright (C) 2004-2006 Atmel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __ASM_AVR32_THREAD_INFO_H
#define __ASM_AVR32_THREAD_INFO_H

#include <asm/page.h>

#define THREAD_SIZE_ORDER	1
#define THREAD_SIZE		(PAGE_SIZE << THREAD_SIZE_ORDER)

#ifndef __ASSEMBLY__
#include <asm/types.h>

struct task_struct;
struct exec_domain;

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;
	__s32			preempt_count;	/* 0 => preemptable, <0 => BUG */
	__u32			rar_saved;	/* return address... */
	__u32			rsr_saved;	/* ...and status register
						   saved by debug handler
						   when setting up
						   trampoline */
	struct restart_block	restart_block;
	__u8			supervisor_stack[0];
};

#define INIT_THREAD_INFO(tsk)						\
{									\
	.task		= &tsk,						\
	.exec_domain	= &default_exec_domain,				\
	.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)

/*
 * Get the thread information struct from C.
 * We do the usual trick and use the lower end of the stack for this
 */
static inline struct thread_info *current_thread_info(void)
{
	unsigned long addr = ~(THREAD_SIZE - 1);

	asm("and %0, sp" : "=r"(addr) : "0"(addr));
	return (struct thread_info *)addr;
}

/* thread information allocation */
#define alloc_thread_info(ti) \
	((struct thread_info *) __get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER))
#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 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_SIGPENDING          1       /* signal pending */
#define TIF_NEED_RESCHED        2       /* rescheduling necessary */
#define TIF_POLLING_NRFLAG      3       /* true if poll_idle() is polling
					   TIF_NEED_RESCHED */
#define TIF_BREAKPOINT		4	/* enter monitor mode on return */
#define TIF_SINGLE_STEP		5	/* single step in progress */
#define TIF_MEMDIE		6
#define TIF_RESTORE_SIGMASK	7	/* restore signal mask in do_signal */
#define TIF_CPU_GOING_TO_SLEEP	8	/* CPU is entering sleep 0 mode */
#define TIF_USERSPACE		31      /* true if FS sets userspace */

#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
#define _TIF_SINGLE_STEP	(1 << TIF_SINGLE_STEP)
#define _TIF_MEMDIE		(1 << TIF_MEMDIE)
#define _TIF_RESTORE_SIGMASK	(1 << TIF_RESTORE_SIGMASK)
#define _TIF_CPU_GOING_TO_SLEEP (1 << TIF_CPU_GOING_TO_SLEEP)

/* Note: The masks below must never span more than 16 bits! */

/* work to do on interrupt/exception return */
#define _TIF_WORK_MASK				\
	((1 << TIF_SIGPENDING)			\
	 | (1 << TIF_NEED_RESCHED)		\
	 | (1 << TIF_POLLING_NRFLAG)		\
	 | (1 << TIF_BREAKPOINT)		\
	 | (1 << TIF_RESTORE_SIGMASK))

/* work to do on any return to userspace */
#define _TIF_ALLWORK_MASK	(_TIF_WORK_MASK | (1 << TIF_SYSCALL_TRACE))
/* work to do on return from debug mode */
#define _TIF_DBGWORK_MASK	(_TIF_WORK_MASK & ~(1 << TIF_BREAKPOINT))

#endif /* __ASM_AVR32_THREAD_INFO_H */
Commit	Line	Data
5f97f7f9 HS	1	/*
	2	* Copyright (C) 2004-2006 Atmel Corporation
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*/
	8	#ifndef __ASM_AVR32_THREAD_INFO_H
	9	#define __ASM_AVR32_THREAD_INFO_H
	10
	11	#include <asm/page.h>
	12
	13	#define THREAD_SIZE_ORDER 1
	14	#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
	15
	16	#ifndef __ASSEMBLY__
	17	#include <asm/types.h>
	18
	19	struct task_struct;
	20	struct exec_domain;
	21
	22	struct thread_info {
	23	struct task_struct task; / main task structure */
	24	struct exec_domain exec_domain; / execution domain */
	25	unsigned long flags; /* low level flags */
	26	__u32 cpu;
	27	__s32 preempt_count; /* 0 => preemptable, <0 => BUG */
2507bc13 HS	28	__u32 rar_saved; /* return address... */
	29	__u32 rsr_saved; /* ...and status register
	30	saved by debug handler
	31	when setting up
	32	trampoline */
5f97f7f9 HS	33	struct restart_block restart_block;
	34	__u8 supervisor_stack[0];
	35	};
	36
	37	#define INIT_THREAD_INFO(tsk) \
	38	{ \
	39	.task = &tsk, \
	40	.exec_domain = &default_exec_domain, \
	41	.flags = 0, \
	42	.cpu = 0, \
	43	.preempt_count = 1, \
	44	.restart_block = { \
	45	.fn = do_no_restart_syscall \
	46	} \
	47	}
	48
	49	#define init_thread_info (init_thread_union.thread_info)
	50	#define init_stack (init_thread_union.stack)
	51
	52	/*
	53	* Get the thread information struct from C.
	54	* We do the usual trick and use the lower end of the stack for this
	55	*/
	56	static inline struct thread_info *current_thread_info(void)
	57	{
	58	unsigned long addr = ~(THREAD_SIZE - 1);
	59
	60	asm("and %0, sp" : "=r"(addr) : "0"(addr));
	61	return (struct thread_info *)addr;
	62	}
	63
	64	/* thread information allocation */
	65	#define alloc_thread_info(ti) \
	66	((struct thread_info *) __get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER))
	67	#define free_thread_info(ti) free_pages((unsigned long)(ti), 1)
	68	#define get_thread_info(ti) get_task_struct((ti)->task)
	69	#define put_thread_info(ti) put_task_struct((ti)->task)
	70
	71	#endif /* !__ASSEMBLY__ */
	72
	73	#define PREEMPT_ACTIVE 0x40000000
	74
	75	/*
	76	* Thread information flags
	77	* - these are process state flags that various assembly files may need to access
	78	* - pending work-to-be-done flags are in LSW
	79	* - other flags in MSW
	80	*/
	81	#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
a583f1b5 SE	82	#define TIF_SIGPENDING 1 /* signal pending */
	83	#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
	84	#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
5f97f7f9	85	TIF_NEED_RESCHED */
2507bc13 HS	86	#define TIF_BREAKPOINT 4 /* enter monitor mode on return */
2507bc13 HS	87	#define TIF_SINGLE_STEP 5 /* single step in progress */
a583f1b5 SE	88	#define TIF_MEMDIE 6
	89	#define TIF_RESTORE_SIGMASK 7 /* restore signal mask in do_signal */
	90	#define TIF_CPU_GOING_TO_SLEEP 8 /* CPU is entering sleep 0 mode */
5f97f7f9 HS	91	#define TIF_USERSPACE 31 /* true if FS sets userspace */
	92
	93	#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
5f97f7f9 HS	94	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
	95	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
	96	#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
5f97f7f9 HS	97	#define _TIF_SINGLE_STEP (1 << TIF_SINGLE_STEP)
	98	#define _TIF_MEMDIE (1 << TIF_MEMDIE)
	99	#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
19b7ce8b	100	#define _TIF_CPU_GOING_TO_SLEEP (1 << TIF_CPU_GOING_TO_SLEEP)
5f97f7f9	101
702f22b3 HS	102	/* Note: The masks below must never span more than 16 bits! */
702f22b3 HS	103
5f97f7f9	104	/* work to do on interrupt/exception return */
702f22b3 HS	105	#define _TIF_WORK_MASK \
	106	((1 << TIF_SIGPENDING) \
	107	\| (1 << TIF_NEED_RESCHED) \
	108	\| (1 << TIF_POLLING_NRFLAG) \
	109	\| (1 << TIF_BREAKPOINT) \
	110	\| (1 << TIF_RESTORE_SIGMASK))
	111
5f97f7f9	112	/* work to do on any return to userspace */
702f22b3	113	#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK \| (1 << TIF_SYSCALL_TRACE))
5f97f7f9	114	/* work to do on return from debug mode */
2507bc13	115	#define _TIF_DBGWORK_MASK (_TIF_WORK_MASK & ~(1 << TIF_BREAKPOINT))
5f97f7f9 HS	116
5f97f7f9 HS	117	#endif /* __ASM_AVR32_THREAD_INFO_H */