1 #ifndef _ASM_SCORE_THREAD_INFO_H
2 #define _ASM_SCORE_THREAD_INFO_H
12 #include <asm/processor.h>
15 * low level task data that entry.S needs immediate access to
16 * - this struct should fit entirely inside of one cache line
17 * - this struct shares the supervisor stack pages
18 * - if the contents of this structure are changed, the assembly constants
19 * must also be changed
22 struct task_struct *task; /* main task structure */
23 struct exec_domain *exec_domain; /* execution domain */
24 unsigned long flags; /* low level flags */
25 unsigned long tp_value; /* thread pointer */
26 __u32 cpu; /* current CPU */
28 /* 0 => preemptable, < 0 => BUG */
32 * thread address space:
33 * 0-0xBFFFFFFF for user-thead
34 * 0-0xFFFFFFFF for kernel-thread
36 mm_segment_t addr_limit;
37 struct restart_block restart_block;
42 * macros/functions for gaining access to the thread information structure
44 * preempt_count needs to be 1 initially, until the scheduler is functional.
46 #define INIT_THREAD_INFO(tsk) \
49 .exec_domain = &default_exec_domain, \
52 .addr_limit = KERNEL_DS, \
54 .fn = do_no_restart_syscall, \
58 #define init_thread_info (init_thread_union.thread_info)
59 #define init_stack (init_thread_union.stack)
61 /* How to get the thread information struct from C. */
62 register struct thread_info *__current_thread_info __asm__("r28");
63 #define current_thread_info() __current_thread_info
65 /* thread information allocation */
66 #define THREAD_SIZE_ORDER (1)
67 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
68 #define THREAD_MASK (THREAD_SIZE - 1UL)
69 #define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
71 #define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
72 #define free_thread_info(info) kfree(info)
74 #endif /* !__ASSEMBLY__ */
76 #define PREEMPT_ACTIVE 0x10000000
79 * thread information flags
80 * - these are process state flags that various assembly files may need to
82 * - pending work-to-be-done flags are in LSW
83 * - other flags in MSW
85 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
86 #define TIF_SIGPENDING 1 /* signal pending */
87 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
88 #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */
89 #define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
90 #define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling
94 #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
95 #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
96 #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
97 #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
98 #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
99 #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
101 #define _TIF_WORK_MASK (0x0000ffff)
103 #endif /* __KERNEL__ */
105 #endif /* _ASM_SCORE_THREAD_INFO_H */