projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 6bc9a396 CL |
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 | ||
| 0dab1006 TA |
11 | #include <asm/page.h> |
| 12 | #include <linux/const.h> | |
| 13 | ||
| 14 | /* thread information allocation */ | |
| c4e26890 TG |
15 | #define THREAD_SIZE_ORDER (1) |
| 16 | #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) | |
| 17 | #define THREAD_MASK (THREAD_SIZE - _AC(1,UL)) | |
| 0dab1006 | 18 | |
| 6bc9a396 CL |
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 */ | |
| 6bc9a396 CL |
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; | |
| 6bc9a396 CL |
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, \ | |
| 6bc9a396 CL |
56 | .cpu = 0, \ |
| 57 | .preempt_count = 1, \ | |
| 58 | .addr_limit = KERNEL_DS, \ | |
| 6bc9a396 CL |
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 | ||
| 6bc9a396 CL |
68 | #endif /* !__ASSEMBLY__ */ |
| 69 | ||
| 6bc9a396 CL |
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 */ | |
| 9973affe | 80 | #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ |
| 6bc9a396 | 81 | #define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */ |
| 0ddc9324 | 82 | #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ |
| 6bc9a396 CL |
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) | |
| 9973affe | 87 | #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) |
| 6bc9a396 CL |
88 | |
| 89 | #define _TIF_WORK_MASK (0x0000ffff) | |
| 90 | ||
| 91 | #endif /* __KERNEL__ */ | |
| 92 | ||
| 93 | #endif /* _ASM_SCORE_THREAD_INFO_H */ |