LXR linux/arch/ia64/include/asm/thread

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Copyright (C) 2002-2003 Hewlett-Packard Co
   4 *      David Mosberger-Tang <davidm@hpl.hp.com>
   5 */
   6#ifndef _ASM_IA64_THREAD_INFO_H
   7#define _ASM_IA64_THREAD_INFO_H
   8
   9#ifndef ASM_OFFSETS_C
  10#include <asm/asm-offsets.h>
  11#endif
  12#include <asm/processor.h>
  13#include <asm/ptrace.h>
  14
  15#define THREAD_SIZE                     KERNEL_STACK_SIZE
  16
  17#ifndef __ASSEMBLY__
  18
  19/*
  20 * On IA-64, we want to keep the task structure and kernel stack together, so they can be
  21 * mapped by a single TLB entry and so they can be addressed by the "current" pointer
  22 * without having to do pointer masking.
  23 */
  24struct thread_info {
  25        struct task_struct *task;       /* XXX not really needed, except for dup_task_struct() */
  26        __u32 flags;                    /* thread_info flags (see TIF_*) */
  27        __u32 cpu;                      /* current CPU */
  28        __u32 last_cpu;                 /* Last CPU thread ran on */
  29        __u32 status;                   /* Thread synchronous flags */
  30        mm_segment_t addr_limit;        /* user-level address space limit */
  31        int preempt_count;              /* 0=premptable, <0=BUG; will also serve as bh-counter */
  32#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
  33        __u64 utime;
  34        __u64 stime;
  35        __u64 gtime;
  36        __u64 hardirq_time;
  37        __u64 softirq_time;
  38        __u64 idle_time;
  39        __u64 ac_stamp;
  40        __u64 ac_leave;
  41        __u64 ac_stime;
  42        __u64 ac_utime;
  43#endif
  44};
  45
  46#define INIT_THREAD_INFO(tsk)                   \
  47{                                               \
  48        .task           = &tsk,                 \
  49        .flags          = 0,                    \
  50        .cpu            = 0,                    \
  51        .addr_limit     = KERNEL_DS,            \
  52        .preempt_count  = INIT_PREEMPT_COUNT,   \
  53}
  54
  55#ifndef ASM_OFFSETS_C
  56/* how to get the thread information struct from C */
  57#define current_thread_info()   ((struct thread_info *) ((char *) current + IA64_TASK_SIZE))
  58#define alloc_thread_stack_node(tsk, node)      \
  59                ((unsigned long *) ((char *) (tsk) + IA64_TASK_SIZE))
  60#define task_thread_info(tsk)   ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE))
  61#else
  62#define current_thread_info()   ((struct thread_info *) 0)
  63#define alloc_thread_stack_node(tsk, node)      ((unsigned long *) 0)
  64#define task_thread_info(tsk)   ((struct thread_info *) 0)
  65#endif
  66#define free_thread_stack(tsk)  /* nothing */
  67#define task_stack_page(tsk)    ((void *)(tsk))
  68
  69#define __HAVE_THREAD_FUNCTIONS
  70#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
  71#define setup_thread_stack(p, org)                      \
  72        *task_thread_info(p) = *task_thread_info(org);  \
  73        task_thread_info(p)->ac_stime = 0;              \
  74        task_thread_info(p)->ac_utime = 0;              \
  75        task_thread_info(p)->task = (p);
  76#else
  77#define setup_thread_stack(p, org) \
  78        *task_thread_info(p) = *task_thread_info(org); \
  79        task_thread_info(p)->task = (p);
  80#endif
  81#define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET)
  82
  83#define alloc_task_struct_node(node)                                            \
  84({                                                                              \
  85        struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP,     \
  86                                             KERNEL_STACK_SIZE_ORDER);          \
  87        struct task_struct *ret = page ? page_address(page) : NULL;             \
  88                                                                                \
  89        ret;                                                                    \
  90})
  91#define free_task_struct(tsk)   free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
  92
  93#endif /* !__ASSEMBLY */
  94
  95/*
  96 * thread information flags
  97 * - these are process state flags that various assembly files may need to access
  98 * - pending work-to-be-done flags are in least-significant 16 bits, other flags
  99 *   in top 16 bits
 100 */
 101#define TIF_SIGPENDING          0       /* signal pending */
 102#define TIF_NEED_RESCHED        1       /* rescheduling necessary */
 103#define TIF_SYSCALL_TRACE       2       /* syscall trace active */
 104#define TIF_SYSCALL_AUDIT       3       /* syscall auditing active */
 105#define TIF_SINGLESTEP          4       /* restore singlestep on return to user mode */
 106#define TIF_NOTIFY_SIGNAL       5       /* signal notification exist */
 107#define TIF_NOTIFY_RESUME       6       /* resumption notification requested */
 108#define TIF_MEMDIE              17      /* is terminating due to OOM killer */
 109#define TIF_MCA_INIT            18      /* this task is processing MCA or INIT */
 110#define TIF_DB_DISABLED         19      /* debug trap disabled for fsyscall */
 111#define TIF_RESTORE_RSE         21      /* user RBS is newer than kernel RBS */
 112#define TIF_POLLING_NRFLAG      22      /* idle is polling for TIF_NEED_RESCHED */
 113
 114#define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
 115#define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
 116#define _TIF_SINGLESTEP         (1 << TIF_SINGLESTEP)
 117#define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP)
 118#define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
 119#define _TIF_NOTIFY_SIGNAL      (1 << TIF_NOTIFY_SIGNAL)
 120#define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
 121#define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
 122#define _TIF_MCA_INIT           (1 << TIF_MCA_INIT)
 123#define _TIF_DB_DISABLED        (1 << TIF_DB_DISABLED)
 124#define _TIF_RESTORE_RSE        (1 << TIF_RESTORE_RSE)
 125#define _TIF_POLLING_NRFLAG     (1 << TIF_POLLING_NRFLAG)
 126
 127/* "work to do on user-return" bits */
 128#define TIF_ALLWORK_MASK        (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\
 129                                 _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE|_TIF_NOTIFY_SIGNAL)
 130/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
 131#define TIF_WORK_MASK           (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))
 132
 133#endif /* _ASM_IA64_THREAD_INFO_H */
 134