projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef __ASM_SH_THREAD_INFO_H |
| 2 | #define __ASM_SH_THREAD_INFO_H | |
| 3 | ||
| 4 | /* SuperH version | |
| 5 | * Copyright (C) 2002 Niibe Yutaka | |
| 6 | * | |
| 7 | * The copyright of original i386 version is: | |
| 8 | * | |
| 9 | * Copyright (C) 2002 David Howells (dhowells@redhat.com) | |
| 10 | * - Incorporating suggestions made by Linus Torvalds and Dave Miller | |
| 11 | */ | |
| 12 | ||
| 13 | #ifdef __KERNEL__ | |
| 14 | ||
| 15 | #ifndef __ASSEMBLY__ | |
| 16 | #include <asm/processor.h> | |
| 17 | ||
| 18 | struct thread_info { | |
| 19 | struct task_struct *task; /* main task structure */ | |
| 20 | struct exec_domain *exec_domain; /* execution domain */ | |
| 21 | __u32 flags; /* low level flags */ | |
| 22 | __u32 cpu; | |
| 23 | __s32 preempt_count; /* 0 => preemptable, <0 => BUG */ | |
| 24 | struct restart_block restart_block; | |
| 25 | __u8 supervisor_stack[0]; | |
| 26 | }; | |
| 27 | ||
| 28 | #endif | |
| 29 | ||
| 37053cc8 | 30 | #define PREEMPT_ACTIVE 0x10000000 |
| 1da177e4 LT |
31 | |
| 32 | /* | |
| 33 | * macros/functions for gaining access to the thread information structure | |
| 34 | */ | |
| 35 | #ifndef __ASSEMBLY__ | |
| 36 | #define INIT_THREAD_INFO(tsk) \ | |
| 37 | { \ | |
| 38 | .task = &tsk, \ | |
| 39 | .exec_domain = &default_exec_domain, \ | |
| 40 | .flags = 0, \ | |
| 41 | .cpu = 0, \ | |
| 42 | .preempt_count = 1, \ | |
| 43 | .restart_block = { \ | |
| 44 | .fn = do_no_restart_syscall, \ | |
| 45 | }, \ | |
| 46 | } | |
| 47 | ||
| 48 | #define init_thread_info (init_thread_union.thread_info) | |
| 49 | #define init_stack (init_thread_union.stack) | |
| 50 | ||
| 51 | /* how to get the thread information struct from C */ | |
| 52 | static inline struct thread_info *current_thread_info(void) | |
| 53 | { | |
| 54 | struct thread_info *ti; | |
| 55 | __asm__("stc r7_bank, %0" : "=r" (ti)); | |
| 56 | return ti; | |
| 57 | } | |
| 58 | ||
| 59 | /* thread information allocation */ | |
| 60 | #define THREAD_SIZE (2*PAGE_SIZE) | |
| 61 | #define alloc_thread_info(ti) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1)) | |
| 62 | #define free_thread_info(ti) free_pages((unsigned long) (ti), 1) | |
| 63 | #define get_thread_info(ti) get_task_struct((ti)->task) | |
| 64 | #define put_thread_info(ti) put_task_struct((ti)->task) | |
| 65 | ||
| 66 | #else /* !__ASSEMBLY__ */ | |
| 67 | ||
| 68 | /* how to get the thread information struct from ASM */ | |
| 69 | #define GET_THREAD_INFO(reg) \ | |
| 70 | stc r7_bank, reg | |
| 71 | ||
| 72 | #endif | |
| 73 | ||
| 74 | /* | |
| 75 | * thread information flags | |
| 76 | * - these are process state flags that various assembly files may need to access | |
| 77 | * - pending work-to-be-done flags are in LSW | |
| 78 | * - other flags in MSW | |
| 79 | */ | |
| 80 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
| 81 | #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ | |
| 82 | #define TIF_SIGPENDING 2 /* signal pending */ | |
| 83 | #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ | |
| 84 | #define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */ | |
| 85 | #define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */ | |
| 86 | #define TIF_MEMDIE 18 | |
| 87 | #define TIF_USERSPACE 31 /* true if FS sets userspace */ | |
| 88 | ||
| 89 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) | |
| 90 | #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) | |
| 91 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) | |
| 92 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) | |
| 93 | #define _TIF_USEDFPU (1<<TIF_USEDFPU) | |
| 94 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) | |
| 95 | #define _TIF_USERSPACE (1<<TIF_USERSPACE) | |
| 96 | ||
| 97 | #define _TIF_WORK_MASK 0x000000FE /* work to do on interrupt/exception return */ | |
| 98 | #define _TIF_ALLWORK_MASK 0x000000FF /* work to do on any return to u-space */ | |
| 99 | ||
| 100 | #endif /* __KERNEL__ */ | |
| 101 | ||
| 102 | #endif /* __ASM_SH_THREAD_INFO_H */ |