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thread_info.h

#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_FREEZE            7     /* is freezing for suspend */

#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_FREEZE           (1 << TIF_FREEZE)

#define _TIF_USER_WORK_MASK     (_TIF_SIGPENDING | \
                                 _TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)

#endif /* __KERNEL__ */

#endif /* _ASM_PARISC_THREAD_INFO_H */

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