arch/parisc/include/asm/thread_info.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_PARISC_THREAD_INFO_H
   3 #define _ASM_PARISC_THREAD_INFO_H
   4
   5 #ifdef __KERNEL__
   6
   7 #ifndef __ASSEMBLY__
   8 #include <asm/processor.h>
   9 #include <asm/special_insns.h>
  10
  11 struct thread_info {
  12         struct task_struct *task;       /* main task structure */
  13         unsigned long flags;            /* thread_info flags (see TIF_*) */
  14         mm_segment_t addr_limit;        /* user-level address space limit */
  15         __u32 cpu;                      /* current CPU */
  16         int preempt_count;              /* 0=premptable, <0=BUG; will also serve as bh-counter */
  17 };
  18
  19 #define INIT_THREAD_INFO(tsk)                   \
  20 {                                               \
  21         .task           = &tsk,                 \
  22         .flags          = 0,                    \
  23         .cpu            = 0,                    \
  24         .addr_limit     = KERNEL_DS,            \
  25         .preempt_count  = INIT_PREEMPT_COUNT,   \
  26 }
  27
  28 #define init_thread_info        (init_thread_union.thread_info)
  29 #define init_stack              (init_thread_union.stack)
  30
  31 /* how to get the thread information struct from C */
  32 #define current_thread_info()   ((struct thread_info *)mfctl(30))
  33
  34 #endif /* !__ASSEMBLY */
  35
  36 /* thread information allocation */
  37
  38 #ifdef CONFIG_IRQSTACKS
  39 #define THREAD_SIZE_ORDER       2 /* PA-RISC requires at least 16k stack */
  40 #else
  41 #define THREAD_SIZE_ORDER       3 /* PA-RISC requires at least 32k stack */
  42 #endif
  43
  44 /* Be sure to hunt all references to this down when you change the size of
  45  * the kernel stack */
  46 #define THREAD_SIZE             (PAGE_SIZE << THREAD_SIZE_ORDER)
  47 #define THREAD_SHIFT            (PAGE_SHIFT + THREAD_SIZE_ORDER)
  48
  49 /*
  50  * thread information flags
  51  */
  52 #define TIF_SYSCALL_TRACE       0       /* syscall trace active */
  53 #define TIF_SIGPENDING          1       /* signal pending */
  54 #define TIF_NEED_RESCHED        2       /* rescheduling necessary */
  55 #define TIF_POLLING_NRFLAG      3       /* true if poll_idle() is polling TIF_NEED_RESCHED */
  56 #define TIF_32BIT               4       /* 32 bit binary */
  57 #define TIF_MEMDIE              5       /* is terminating due to OOM killer */
  58 #define TIF_SYSCALL_AUDIT       7       /* syscall auditing active */
  59 #define TIF_NOTIFY_RESUME       8       /* callback before returning to user */
  60 #define TIF_SINGLESTEP          9       /* single stepping? */
  61 #define TIF_BLOCKSTEP           10      /* branch stepping? */
  62 #define TIF_SECCOMP             11      /* secure computing */
  63 #define TIF_SYSCALL_TRACEPOINT  12      /* syscall tracepoint instrumentation */
  64
  65 #define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
  66 #define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
  67 #define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
  68 #define _TIF_POLLING_NRFLAG     (1 << TIF_POLLING_NRFLAG)
  69 #define _TIF_32BIT              (1 << TIF_32BIT)
  70 #define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
  71 #define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
  72 #define _TIF_SINGLESTEP         (1 << TIF_SINGLESTEP)
  73 #define _TIF_BLOCKSTEP          (1 << TIF_BLOCKSTEP)
  74 #define _TIF_SECCOMP            (1 << TIF_SECCOMP)
  75 #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
  76
  77 #define _TIF_USER_WORK_MASK     (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
  78                                  _TIF_NEED_RESCHED)
  79 #define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
  80                                  _TIF_BLOCKSTEP | _TIF_SYSCALL_AUDIT | \
  81                                  _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT)
  82
  83 #ifdef CONFIG_64BIT
  84 # ifdef CONFIG_COMPAT
  85 #  define is_32bit_task()       (test_thread_flag(TIF_32BIT))
  86 # else
  87 #  define is_32bit_task()       (0)
  88 # endif
  89 #else
  90 # define is_32bit_task()        (1)
  91 #endif
  92
  93 #endif /* __KERNEL__ */
  94
  95 #endif /* _ASM_PARISC_THREAD_INFO_H */