arch/nds32/include/asm/thread_info.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (C) 2005-2017 Andes Technology Corporation
   3
   4 #ifndef __ASM_NDS32_THREAD_INFO_H
   5 #define __ASM_NDS32_THREAD_INFO_H
   6
   7 #ifdef __KERNEL__
   8
   9 #define THREAD_SIZE_ORDER       (1)
  10 #define THREAD_SIZE             (PAGE_SIZE << THREAD_SIZE_ORDER)
  11
  12 #ifndef __ASSEMBLY__
  13
  14 struct task_struct;
  15
  16 #include <asm/ptrace.h>
  17 #include <asm/types.h>
  18
  19 typedef unsigned long mm_segment_t;
  20
  21 /*
  22  * low level task data that entry.S needs immediate access to.
  23  * __switch_to() assumes cpu_context follows immediately after cpu_domain.
  24  */
  25 struct thread_info {
  26         unsigned long flags;    /* low level flags */
  27         __s32 preempt_count;    /* 0 => preemptable, <0 => bug */
  28         mm_segment_t addr_limit;        /* address limit */
  29 };
  30 #define INIT_THREAD_INFO(tsk)                                           \
  31 {                                                                       \
  32         .preempt_count  = INIT_PREEMPT_COUNT,                           \
  33         .addr_limit     = KERNEL_DS,                                    \
  34 }
  35 #define thread_saved_pc(tsk) ((unsigned long)(tsk->thread.cpu_context.pc))
  36 #define thread_saved_fp(tsk) ((unsigned long)(tsk->thread.cpu_context.fp))
  37 #endif
  38
  39 /*
  40  * thread information flags:
  41  *  TIF_SYSCALL_TRACE   - syscall trace active
  42  *  TIF_SIGPENDING      - signal pending
  43  *  TIF_NEED_RESCHED    - rescheduling necessary
  44  *  TIF_NOTIFY_RESUME   - callback before returning to user
  45  *  TIF_USEDFPU         - FPU was used by this task this quantum (SMP)
  46  *  TIF_POLLING_NRFLAG  - true if poll_idle() is polling TIF_NEED_RESCHED
  47  */
  48 #define TIF_SIGPENDING          1
  49 #define TIF_NEED_RESCHED        2
  50 #define TIF_SINGLESTEP          3
  51 #define TIF_NOTIFY_RESUME       4       /* callback before returning to user */
  52 #define TIF_SYSCALL_TRACE       8
  53 #define TIF_USEDFPU             16
  54 #define TIF_POLLING_NRFLAG      17
  55 #define TIF_MEMDIE              18
  56 #define TIF_FREEZE              19
  57 #define TIF_RESTORE_SIGMASK     20
  58
  59 #define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
  60 #define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
  61 #define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
  62 #define _TIF_SINGLESTEP         (1 << TIF_SINGLESTEP)
  63 #define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
  64 #define _TIF_POLLING_NRFLAG     (1 << TIF_POLLING_NRFLAG)
  65 #define _TIF_FREEZE             (1 << TIF_FREEZE)
  66 #define _TIF_RESTORE_SIGMASK    (1 << TIF_RESTORE_SIGMASK)
  67
  68 /*
  69  * Change these and you break ASM code in entry-common.S
  70  */
  71 #define _TIF_WORK_MASK          0x000000ff
  72 #define _TIF_WORK_SYSCALL_ENTRY (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP)
  73 #define _TIF_WORK_SYSCALL_LEAVE (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP)
  74
  75 #endif /* __KERNEL__ */
  76 #endif /* __ASM_NDS32_THREAD_INFO_H */