root/arch/parisc/include/asm/thread_info.h

INCLUDED FROM

   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 /* how to get the thread information struct from C */
  29 #define current_thread_info()   ((struct thread_info *)mfctl(30))
  30 
  31 #endif /* !__ASSEMBLY */
  32 
  33 /* thread information allocation */
  34 
  35 #ifdef CONFIG_IRQSTACKS
  36 #define THREAD_SIZE_ORDER       2 /* PA-RISC requires at least 16k stack */
  37 #else
  38 #define THREAD_SIZE_ORDER       3 /* PA-RISC requires at least 32k stack */
  39 #endif
  40 
  41 /* Be sure to hunt all references to this down when you change the size of
  42  * the kernel stack */
  43 #define THREAD_SIZE             (PAGE_SIZE << THREAD_SIZE_ORDER)
  44 #define THREAD_SHIFT            (PAGE_SHIFT + THREAD_SIZE_ORDER)
  45 
  46 /*
  47  * thread information flags
  48  */
  49 #define TIF_SYSCALL_TRACE       0       /* syscall trace active */
  50 #define TIF_SIGPENDING          1       /* signal pending */
  51 #define TIF_NEED_RESCHED        2       /* rescheduling necessary */
  52 #define TIF_POLLING_NRFLAG      3       /* true if poll_idle() is polling TIF_NEED_RESCHED */
  53 #define TIF_32BIT               4       /* 32 bit binary */
  54 #define TIF_MEMDIE              5       /* is terminating due to OOM killer */
  55 #define TIF_SYSCALL_AUDIT       7       /* syscall auditing active */
  56 #define TIF_NOTIFY_RESUME       8       /* callback before returning to user */
  57 #define TIF_SINGLESTEP          9       /* single stepping? */
  58 #define TIF_BLOCKSTEP           10      /* branch stepping? */
  59 #define TIF_SECCOMP             11      /* secure computing */
  60 #define TIF_SYSCALL_TRACEPOINT  12      /* syscall tracepoint instrumentation */
  61 
  62 #define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
  63 #define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
  64 #define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
  65 #define _TIF_POLLING_NRFLAG     (1 << TIF_POLLING_NRFLAG)
  66 #define _TIF_32BIT              (1 << TIF_32BIT)
  67 #define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
  68 #define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
  69 #define _TIF_SINGLESTEP         (1 << TIF_SINGLESTEP)
  70 #define _TIF_BLOCKSTEP          (1 << TIF_BLOCKSTEP)
  71 #define _TIF_SECCOMP            (1 << TIF_SECCOMP)
  72 #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
  73 
  74 #define _TIF_USER_WORK_MASK     (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
  75                                  _TIF_NEED_RESCHED)
  76 #define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
  77                                  _TIF_BLOCKSTEP | _TIF_SYSCALL_AUDIT | \
  78                                  _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT)
  79 
  80 #ifdef CONFIG_64BIT
  81 # ifdef CONFIG_COMPAT
  82 #  define is_32bit_task()       (test_thread_flag(TIF_32BIT))
  83 # else
  84 #  define is_32bit_task()       (0)
  85 # endif
  86 #else
  87 # define is_32bit_task()        (1)
  88 #endif
  89 
  90 #endif /* __KERNEL__ */
  91 
  92 #endif /* _ASM_PARISC_THREAD_INFO_H */