LXR linux/arch/score/include/asm/thread

   1#ifndef _ASM_SCORE_THREAD_INFO_H
   2#define _ASM_SCORE_THREAD_INFO_H
   3
   4#ifdef __KERNEL__
   5
   6#define KU_MASK 0x08
   7#define KU_USER 0x08
   8#define KU_KERN 0x00
   9
  10#include <asm/page.h>
  11#include <linux/const.h>
  12
  13/* thread information allocation */
  14#define THREAD_SIZE_ORDER       (1)
  15#define THREAD_SIZE             (PAGE_SIZE << THREAD_SIZE_ORDER)
  16#define THREAD_MASK             (THREAD_SIZE - _AC(1,UL))
  17#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
  18
  19#ifndef __ASSEMBLY__
  20
  21#include <asm/processor.h>
  22
  23/*
  24 * low level task data that entry.S needs immediate access to
  25 * - this struct should fit entirely inside of one cache line
  26 * - this struct shares the supervisor stack pages
  27 * - if the contents of this structure are changed, the assembly constants
  28 *   must also be changed
  29 */
  30struct thread_info {
  31        struct task_struct      *task;          /* main task structure */
  32        struct exec_domain      *exec_domain;   /* execution domain */
  33        unsigned long           flags;          /* low level flags */
  34        unsigned long           tp_value;       /* thread pointer */
  35        __u32                   cpu;            /* current CPU */
  36
  37        /* 0 => preemptable, < 0 => BUG */
  38        int                     preempt_count;
  39
  40        /*
  41         * thread address space:
  42         * 0-0xBFFFFFFF for user-thead
  43         * 0-0xFFFFFFFF for kernel-thread
  44         */
  45        mm_segment_t            addr_limit;
  46        struct restart_block    restart_block;
  47        struct pt_regs          *regs;
  48};
  49
  50/*
  51 * macros/functions for gaining access to the thread information structure
  52 *
  53 * preempt_count needs to be 1 initially, until the scheduler is functional.
  54 */
  55#define INIT_THREAD_INFO(tsk)                   \
  56{                                               \
  57        .task           = &tsk,                 \
  58        .exec_domain    = &default_exec_domain, \
  59        .cpu            = 0,                    \
  60        .preempt_count  = 1,                    \
  61        .addr_limit     = KERNEL_DS,            \
  62        .restart_block  = {                     \
  63                .fn = do_no_restart_syscall,    \
  64        },                                      \
  65}
  66
  67#define init_thread_info        (init_thread_union.thread_info)
  68#define init_stack              (init_thread_union.stack)
  69
  70/* How to get the thread information struct from C. */
  71register struct thread_info *__current_thread_info __asm__("r28");
  72#define current_thread_info()   __current_thread_info
  73
  74#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
  75#define free_thread_info(info) kfree(info)
  76
  77#endif /* !__ASSEMBLY__ */
  78
  79#define PREEMPT_ACTIVE          0x10000000
  80
  81/*
  82 * thread information flags
  83 * - these are process state flags that various assembly files may need to
  84 *   access
  85 * - pending work-to-be-done flags are in LSW
  86 * - other flags in MSW
  87 */
  88#define TIF_SYSCALL_TRACE       0       /* syscall trace active */
  89#define TIF_SIGPENDING          1       /* signal pending */
  90#define TIF_NEED_RESCHED        2       /* rescheduling necessary */
  91#define TIF_NOTIFY_RESUME       5       /* callback before returning to user */
  92#define TIF_RESTORE_SIGMASK     9       /* restore signal mask in do_signal() */
  93#define TIF_POLLING_NRFLAG      17      /* true if poll_idle() is polling
  94                                                 TIF_NEED_RESCHED */
  95#define TIF_MEMDIE              18
  96
  97#define _TIF_SYSCALL_TRACE      (1<<TIF_SYSCALL_TRACE)
  98#define _TIF_SIGPENDING         (1<<TIF_SIGPENDING)
  99#define _TIF_NEED_RESCHED       (1<<TIF_NEED_RESCHED)
 100#define _TIF_NOTIFY_RESUME      (1<<TIF_NOTIFY_RESUME)
 101#define _TIF_RESTORE_SIGMASK    (1<<TIF_RESTORE_SIGMASK)
 102#define _TIF_POLLING_NRFLAG     (1<<TIF_POLLING_NRFLAG)
 103
 104#define _TIF_WORK_MASK          (0x0000ffff)
 105
 106#endif /* __KERNEL__ */
 107
 108#endif /* _ASM_SCORE_THREAD_INFO_H */
 109