1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_SCORE_THREAD_INFO_H 3 #define _ASM_SCORE_THREAD_INFO_H 4 5 #ifdef __KERNEL__ 6 7 #define KU_MASK 0x08 8 #define KU_USER 0x08 9 #define KU_KERN 0x00 10 11 #include <asm/page.h> 12 #include <linux/const.h> 13 14 /* thread information allocation */ 15 #define THREAD_SIZE_ORDER (1) 16 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) 17 #define THREAD_MASK (THREAD_SIZE - _AC(1,UL)) 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 */ 30 struct thread_info { 31 struct task_struct *task; /* main task structure */ 32 unsigned long flags; /* low level flags */ 33 unsigned long tp_value; /* thread pointer */ 34 __u32 cpu; /* current CPU */ 35 36 /* 0 => preemptable, < 0 => BUG */ 37 int preempt_count; 38 39 /* 40 * thread address space: 41 * 0-0xBFFFFFFF for user-thead 42 * 0-0xFFFFFFFF for kernel-thread 43 */ 44 mm_segment_t addr_limit; 45 struct pt_regs *regs; 46 }; 47 48 /* 49 * macros/functions for gaining access to the thread information structure 50 * 51 * preempt_count needs to be 1 initially, until the scheduler is functional. 52 */ 53 #define INIT_THREAD_INFO(tsk) \ 54 { \ 55 .task = &tsk, \ 56 .cpu = 0, \ 57 .preempt_count = 1, \ 58 .addr_limit = KERNEL_DS, \ 59 } 60 61 #define init_thread_info (init_thread_union.thread_info) 62 #define init_stack (init_thread_union.stack) 63 64 /* How to get the thread information struct from C. */ 65 register struct thread_info *__current_thread_info __asm__("r28"); 66 #define current_thread_info() __current_thread_info 67 68 #endif /* !__ASSEMBLY__ */ 69 70 /* 71 * thread information flags 72 * - these are process state flags that various assembly files may need to 73 * access 74 * - pending work-to-be-done flags are in LSW 75 * - other flags in MSW 76 */ 77 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ 78 #define TIF_SIGPENDING 1 /* signal pending */ 79 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ 80 #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ 81 #define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */ 82 #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ 83 84 #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) 85 #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) 86 #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) 87 #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) 88 89 #define _TIF_WORK_MASK (0x0000ffff) 90 91 #endif /* __KERNEL__ */ 92 93 #endif /* _ASM_SCORE_THREAD_INFO_H */ 94