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Viewing changes to arch/um/include/asm/thread_info.h

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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arch/um/include/asm/thread_info.h
 
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/*
 
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 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 
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 * Licensed under the GPL
 
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 */
 
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#ifndef __UM_THREAD_INFO_H
 
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#define __UM_THREAD_INFO_H
 
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#ifndef __ASSEMBLY__
 
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#include <asm/types.h>
 
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#include <asm/page.h>
 
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#include <asm/uaccess.h>
 
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struct thread_info {
 
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        struct task_struct      *task;          /* main task structure */
 
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        struct exec_domain      *exec_domain;   /* execution domain */
 
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        unsigned long           flags;          /* low level flags */
 
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        __u32                   cpu;            /* current CPU */
 
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        int                     preempt_count;  /* 0 => preemptable,
 
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                                                   <0 => BUG */
 
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        mm_segment_t            addr_limit;     /* thread address space:
 
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                                                   0-0xBFFFFFFF for user
 
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                                                   0-0xFFFFFFFF for kernel */
 
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        struct restart_block    restart_block;
 
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        struct thread_info      *real_thread;    /* Points to non-IRQ stack */
 
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};
 
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#define INIT_THREAD_INFO(tsk)                   \
 
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{                                               \
 
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        .task =         &tsk,                   \
 
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        .exec_domain =  &default_exec_domain,   \
 
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        .flags =                0,              \
 
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        .cpu =          0,                      \
 
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        .preempt_count = INIT_PREEMPT_COUNT,    \
 
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        .addr_limit =   KERNEL_DS,              \
 
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        .restart_block =  {                     \
 
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                .fn =  do_no_restart_syscall,   \
 
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        },                                      \
 
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        .real_thread = NULL,                    \
 
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}
 
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#define init_thread_info        (init_thread_union.thread_info)
 
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#define init_stack              (init_thread_union.stack)
 
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#define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
 
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/* how to get the thread information struct from C */
 
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static inline struct thread_info *current_thread_info(void)
 
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{
 
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        struct thread_info *ti;
 
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        unsigned long mask = THREAD_SIZE - 1;
 
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        void *p;
 
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        asm volatile ("" : "=r" (p) : "0" (&ti));
 
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        ti = (struct thread_info *) (((unsigned long)p) & ~mask);
 
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        return ti;
 
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}
 
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#define THREAD_SIZE_ORDER CONFIG_KERNEL_STACK_ORDER
 
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#endif
 
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#define PREEMPT_ACTIVE          0x10000000
 
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#define TIF_SYSCALL_TRACE       0       /* syscall trace active */
 
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#define TIF_SIGPENDING          1       /* signal pending */
 
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#define TIF_NEED_RESCHED        2       /* rescheduling necessary */
 
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#define TIF_POLLING_NRFLAG      3       /* true if poll_idle() is polling
 
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                                         * TIF_NEED_RESCHED */
 
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#define TIF_RESTART_BLOCK       4
 
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#define TIF_MEMDIE              5       /* is terminating due to OOM killer */
 
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#define TIF_SYSCALL_AUDIT       6
 
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#define TIF_RESTORE_SIGMASK     7
 
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#define TIF_FREEZE              16      /* is freezing for suspend */
 
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#define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
 
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#define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
 
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#define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
 
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#define _TIF_POLLING_NRFLAG     (1 << TIF_POLLING_NRFLAG)
 
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#define _TIF_MEMDIE             (1 << TIF_MEMDIE)
 
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#define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
 
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#define _TIF_RESTORE_SIGMASK    (1 << TIF_RESTORE_SIGMASK)
 
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#define _TIF_FREEZE             (1 << TIF_FREEZE)
 
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#endif