Release 4.10 arch/avr32/include/asm/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 thread_info {
	
struct task_struct	*task;		/* main task structure */
	
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 */
	
__u8			supervisor_stack[0];
};


#define INIT_THREAD_INFO(tsk)						\
{                                                                       \
        .task           = &tsk,                                         \
        .flags          = 0,                                            \
        .cpu            = 0,                                            \
        .preempt_count  = INIT_PREEMPT_COUNT,                           \
}


#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;
}

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#define get_thread_info(ti) get_task_struct((ti)->task)

#define put_thread_info(ti) put_task_struct((ti)->task)

#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_SIGPENDING          1       
/* signal pending */

#define TIF_NEED_RESCHED        2       
/* rescheduling necessary */

#define TIF_BREAKPOINT		4	
/* enter monitor mode on return */

#define TIF_SINGLE_STEP		5	
/* single step in progress */

#define TIF_MEMDIE		6	
/* is terminating due to OOM killer */

#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_NOTIFY_RESUME	9	
/* callback before returning to user */

#define TIF_DEBUG		30	
/* debugging enabled */

#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_BREAKPOINT		(1 << TIF_BREAKPOINT)

#define _TIF_SINGLE_STEP	(1 << TIF_SINGLE_STEP)

#define _TIF_MEMDIE		(1 << TIF_MEMDIE)

#define _TIF_CPU_GOING_TO_SLEEP (1 << TIF_CPU_GOING_TO_SLEEP)

#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)

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

/* work to do on interrupt/exception return */

#define _TIF_WORK_MASK				\
	(_TIF_SIGPENDING                        \
         | _TIF_NOTIFY_RESUME                   \
         | _TIF_NEED_RESCHED                    \
         | _TIF_BREAKPOINT)

/* work to do on any return to userspace */

#define _TIF_ALLWORK_MASK	(_TIF_WORK_MASK | _TIF_SYSCALL_TRACE)
/* work to do on return from debug mode */

#define _TIF_DBGWORK_MASK	(_TIF_WORK_MASK & ~_TIF_BREAKPOINT)

#endif /* __ASM_AVR32_THREAD_INFO_H */
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Directory: arch/avr32/include/asm

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