root/include/asm-parisc/thread_info.h

INCLUDED FROM

#ifndef _ASM_PARISC_THREAD_INFO_H
#define _ASM_PARISC_THREAD_INFO_H

#ifdef __KERNEL__

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

struct thread_info {
        struct task_struct *task;       /* main task structure */
        struct exec_domain *exec_domain;/* execution domain */
        unsigned long flags;            /* thread_info flags (see TIF_*) */
        mm_segment_t addr_limit;        /* user-level address space limit */
        __u32 cpu;                      /* current CPU */
        int preempt_count;              /* 0=premptable, <0=BUG; will also serve as bh-counter */
        struct restart_block restart_block;
};

#define INIT_THREAD_INFO(tsk)                   \
{                                               \
        .task           = &tsk,                 \
        .exec_domain    = &default_exec_domain, \
        .flags          = 0,                    \
        .cpu            = 0,                    \
        .addr_limit     = KERNEL_DS,            \
        .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)

/* thread information allocation */

#define THREAD_SIZE_ORDER            2
/* Be sure to hunt all references to this down when you change the size of
 * the kernel stack */
#define THREAD_SIZE             (PAGE_SIZE << THREAD_SIZE_ORDER)
#define THREAD_SHIFT            (PAGE_SHIFT + THREAD_SIZE_ORDER)

/* how to get the thread information struct from C */
#define current_thread_info()   ((struct thread_info *)mfctl(30))

#endif /* !__ASSEMBLY */

#define PREEMPT_ACTIVE_BIT      28
#define PREEMPT_ACTIVE          (1 << PREEMPT_ACTIVE_BIT)

/*
 * thread information flags
 */
#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_32BIT               4       /* 32 bit binary */
#define TIF_MEMDIE              5
#define TIF_RESTORE_SIGMASK     6       /* restore saved signal mask */

#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_32BIT              (1 << TIF_32BIT)
#define _TIF_RESTORE_SIGMASK    (1 << TIF_RESTORE_SIGMASK)

#define _TIF_USER_WORK_MASK     (_TIF_SIGPENDING | \
                                 _TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)

#endif /* __KERNEL__ */

#endif /* _ASM_PARISC_THREAD_INFO_H */