LXR linux/arch/microblaze/include/asm/thread

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Copyright (C) 2006 Atmark Techno, Inc.
   4 */
   5
   6#ifndef _ASM_MICROBLAZE_THREAD_INFO_H
   7#define _ASM_MICROBLAZE_THREAD_INFO_H
   8
   9#ifdef __KERNEL__
  10
  11/* we have 8k stack */
  12#define THREAD_SHIFT            13
  13#define THREAD_SIZE             (1 << THREAD_SHIFT)
  14#define THREAD_SIZE_ORDER       1
  15
  16#ifndef __ASSEMBLY__
  17# include <linux/types.h>
  18# include <asm/processor.h>
  19
  20/*
  21 * low level task data that entry.S needs immediate access to
  22 * - this struct should fit entirely inside of one cache line
  23 * - this struct shares the supervisor stack pages
  24 * - if the contents of this structure are changed, the assembly constants
  25 *       must also be changed
  26 */
  27
  28struct cpu_context {
  29        __u32   r1; /* stack pointer */
  30        __u32   r2;
  31        /* dedicated registers */
  32        __u32   r13;
  33        __u32   r14;
  34        __u32   r15;
  35        __u32   r16;
  36        __u32   r17;
  37        __u32   r18;
  38        /* non-volatile registers */
  39        __u32   r19;
  40        __u32   r20;
  41        __u32   r21;
  42        __u32   r22;
  43        __u32   r23;
  44        __u32   r24;
  45        __u32   r25;
  46        __u32   r26;
  47        __u32   r27;
  48        __u32   r28;
  49        __u32   r29;
  50        __u32   r30;
  51        /* r31 is used as current task pointer */
  52        /* special purpose registers */
  53        __u32   msr;
  54        __u32   ear;
  55        __u32   esr;
  56        __u32   fsr;
  57};
  58
  59typedef struct {
  60        unsigned long seg;
  61} mm_segment_t;
  62
  63struct thread_info {
  64        struct task_struct      *task; /* main task structure */
  65        unsigned long           flags; /* low level flags */
  66        unsigned long           status; /* thread-synchronous flags */
  67        __u32                   cpu; /* current CPU */
  68        __s32                   preempt_count; /* 0 => preemptable,< 0 => BUG*/
  69        mm_segment_t            addr_limit; /* thread address space */
  70
  71        struct cpu_context      cpu_context;
  72};
  73
  74/*
  75 * macros/functions for gaining access to the thread information structure
  76 */
  77#define INIT_THREAD_INFO(tsk)                   \
  78{                                               \
  79        .task           = &tsk,                 \
  80        .flags          = 0,                    \
  81        .cpu            = 0,                    \
  82        .preempt_count  = INIT_PREEMPT_COUNT,   \
  83        .addr_limit     = KERNEL_DS,            \
  84}
  85
  86/* how to get the thread information struct from C */
  87static inline struct thread_info *current_thread_info(void)
  88{
  89        register unsigned long sp asm("r1");
  90
  91        return (struct thread_info *)(sp & ~(THREAD_SIZE-1));
  92}
  93
  94/* thread information allocation */
  95#endif /* __ASSEMBLY__ */
  96
  97/*
  98 * thread information flags
  99 * - these are process state flags that various assembly files may
 100 *   need to access
 101 * - pending work-to-be-done flags are in LSW
 102 * - other flags in MSW
 103 */
 104#define TIF_SYSCALL_TRACE       0 /* syscall trace active */
 105#define TIF_NOTIFY_RESUME       1 /* resumption notification requested */
 106#define TIF_SIGPENDING          2 /* signal pending */
 107#define TIF_NEED_RESCHED        3 /* rescheduling necessary */
 108/* restore singlestep on return to user mode */
 109#define TIF_SINGLESTEP          4
 110#define TIF_NOTIFY_SIGNAL       5       /* signal notifications exist */
 111#define TIF_MEMDIE              6       /* is terminating due to OOM killer */
 112#define TIF_SYSCALL_AUDIT       9       /* syscall auditing active */
 113#define TIF_SECCOMP             10      /* secure computing */
 114
 115/* true if poll_idle() is polling TIF_NEED_RESCHED */
 116#define TIF_POLLING_NRFLAG      16
 117
 118#define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
 119#define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
 120#define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
 121#define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
 122#define _TIF_SINGLESTEP         (1 << TIF_SINGLESTEP)
 123#define _TIF_NOTIFY_SIGNAL      (1 << TIF_NOTIFY_SIGNAL)
 124#define _TIF_POLLING_NRFLAG     (1 << TIF_POLLING_NRFLAG)
 125#define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
 126#define _TIF_SECCOMP            (1 << TIF_SECCOMP)
 127
 128/* work to do in syscall trace */
 129#define _TIF_WORK_SYSCALL_MASK  (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
 130                                 _TIF_SYSCALL_AUDIT | _TIF_SECCOMP)
 131
 132/* work to do on interrupt/exception return */
 133#define _TIF_WORK_MASK          0x0000FFFE
 134
 135/* work to do on any return to u-space */
 136#define _TIF_ALLWORK_MASK       0x0000FFFF
 137
 138/*
 139 * Thread-synchronous status.
 140 *
 141 * This is different from the flags in that nobody else
 142 * ever touches our thread-synchronous status, so we don't
 143 * have to worry about atomic accesses.
 144 */
 145/* FPU was used by this task this quantum (SMP) */
 146#define TS_USEDFPU              0x0001
 147
 148#endif /* __KERNEL__ */
 149#endif /* _ASM_MICROBLAZE_THREAD_INFO_H */
 150