1 #ifndef _ASM_SCORE_THREAD_INFO_H
2 #define _ASM_SCORE_THREAD_INFO_H
11 #include <linux/const.h>
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))
20 #include <asm/processor.h>
23 * low level task data that entry.S needs immediate access to
24 * - this struct should fit entirely inside of one cache line
25 * - this struct shares the supervisor stack pages
26 * - if the contents of this structure are changed, the assembly constants
27 * must also be changed
30 struct task_struct *task; /* main task structure */
31 struct exec_domain *exec_domain; /* execution domain */
32 unsigned long flags; /* low level flags */
33 unsigned long tp_value; /* thread pointer */
34 __u32 cpu; /* current CPU */
36 /* 0 => preemptable, < 0 => BUG */
40 * thread address space:
41 * 0-0xBFFFFFFF for user-thead
42 * 0-0xFFFFFFFF for kernel-thread
44 mm_segment_t addr_limit;
49 * macros/functions for gaining access to the thread information structure
51 * preempt_count needs to be 1 initially, until the scheduler is functional.
53 #define INIT_THREAD_INFO(tsk) \
56 .exec_domain = &default_exec_domain, \
59 .addr_limit = KERNEL_DS, \
62 #define init_thread_info (init_thread_union.thread_info)
63 #define init_stack (init_thread_union.stack)
65 /* How to get the thread information struct from C. */
66 register struct thread_info *__current_thread_info __asm__("r28");
67 #define current_thread_info() __current_thread_info
69 #endif /* !__ASSEMBLY__ */
72 * thread information flags
73 * - these are process state flags that various assembly files may need to
75 * - pending work-to-be-done flags are in LSW
76 * - other flags in MSW
78 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
79 #define TIF_SIGPENDING 1 /* signal pending */
80 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
81 #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */
82 #define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
83 #define TIF_MEMDIE 18 /* is terminating due to OOM killer */
85 #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
86 #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
87 #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
88 #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
90 #define _TIF_WORK_MASK (0x0000ffff)
92 #endif /* __KERNEL__ */
94 #endif /* _ASM_SCORE_THREAD_INFO_H */