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 18 #ifndef __ASSEMBLY__ 19 20 #include <asm/processor.h> 21 22 /* 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 28 */ 29 struct thread_info { 30 struct task_struct *task; /* main task structure */ 31 unsigned long flags; /* low level flags */ 32 unsigned long tp_value; /* thread pointer */ 33 __u32 cpu; /* current CPU */ 34 35 /* 0 => preemptable, < 0 => BUG */ 36 int preempt_count; 37 38 /* 39 * thread address space: 40 * 0-0xBFFFFFFF for user-thead 41 * 0-0xFFFFFFFF for kernel-thread 42 */ 43 mm_segment_t addr_limit; 44 struct pt_regs *regs; 45 }; 46 47 /* 48 * macros/functions for gaining access to the thread information structure 49 * 50 * preempt_count needs to be 1 initially, until the scheduler is functional. 51 */ 52 #define INIT_THREAD_INFO(tsk) \ 53 { \ 54 .task = &tsk, \ 55 .cpu = 0, \ 56 .preempt_count = 1, \ 57 .addr_limit = KERNEL_DS, \ 58 } 59 60 #define init_thread_info (init_thread_union.thread_info) 61 #define init_stack (init_thread_union.stack) 62 63 /* How to get the thread information struct from C. */ 64 register struct thread_info *__current_thread_info __asm__("r28"); 65 #define current_thread_info() __current_thread_info 66 67 #endif /* !__ASSEMBLY__ */ 68 69 /* 70 * thread information flags 71 * - these are process state flags that various assembly files may need to 72 * access 73 * - pending work-to-be-done flags are in LSW 74 * - other flags in MSW 75 */ 76 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ 77 #define TIF_SIGPENDING 1 /* signal pending */ 78 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ 79 #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ 80 #define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */ 81 #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ 82 83 #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) 84 #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) 85 #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) 86 #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) 87 88 #define _TIF_WORK_MASK (0x0000ffff) 89 90 #endif /* __KERNEL__ */ 91 92 #endif /* _ASM_SCORE_THREAD_INFO_H */ 93