projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 71995e4d LFT |
1 | /* |
| 2 | * NiosII low-level thread information | |
| 3 | * | |
| 4 | * Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch> | |
| 5 | * Copyright (C) 2004 Microtronix Datacom Ltd. | |
| 6 | * | |
| 7 | * Based on asm/thread_info_no.h from m68k which is: | |
| 8 | * | |
| 9 | * Copyright (C) 2002 David Howells <dhowells@redhat.com> | |
| 10 | * | |
| 11 | * This file is subject to the terms and conditions of the GNU General Public | |
| 12 | * License. See the file "COPYING" in the main directory of this archive | |
| 13 | * for more details. | |
| 14 | */ | |
| 15 | ||
| 16 | #ifndef _ASM_NIOS2_THREAD_INFO_H | |
| 17 | #define _ASM_NIOS2_THREAD_INFO_H | |
| 18 | ||
| 19 | #ifdef __KERNEL__ | |
| 20 | ||
| 21 | /* | |
| 22 | * Size of the kernel stack for each process. | |
| 23 | */ | |
| 24 | #define THREAD_SIZE_ORDER 1 | |
| 25 | #define THREAD_SIZE 8192 /* 2 * PAGE_SIZE */ | |
| 26 | ||
| 27 | #ifndef __ASSEMBLY__ | |
| 28 | ||
| 29 | typedef struct { | |
| 30 | unsigned long seg; | |
| 31 | } mm_segment_t; | |
| 32 | ||
| 33 | /* | |
| 34 | * low level task data that entry.S needs immediate access to | |
| 35 | * - this struct should fit entirely inside of one cache line | |
| 36 | * - this struct shares the supervisor stack pages | |
| 37 | * - if the contents of this structure are changed, the assembly constants | |
| 38 | * must also be changed | |
| 39 | */ | |
| 40 | struct thread_info { | |
| 41 | struct task_struct *task; /* main task structure */ | |
| 71995e4d LFT |
42 | unsigned long flags; /* low level flags */ |
| 43 | __u32 cpu; /* current CPU */ | |
| 44 | int preempt_count; /* 0 => preemptable,<0 => BUG */ | |
| 45 | mm_segment_t addr_limit; /* thread address space: | |
| 46 | 0-0x7FFFFFFF for user-thead | |
| 47 | 0-0xFFFFFFFF for kernel-thread | |
| 48 | */ | |
| 71995e4d LFT |
49 | struct pt_regs *regs; |
| 50 | }; | |
| 51 | ||
| 52 | /* | |
| 53 | * macros/functions for gaining access to the thread information structure | |
| 54 | * | |
| 55 | * preempt_count needs to be 1 initially, until the scheduler is functional. | |
| 56 | */ | |
| 57 | #define INIT_THREAD_INFO(tsk) \ | |
| 58 | { \ | |
| 59 | .task = &tsk, \ | |
| 71995e4d LFT |
60 | .flags = 0, \ |
| 61 | .cpu = 0, \ | |
| 62 | .preempt_count = INIT_PREEMPT_COUNT, \ | |
| 63 | .addr_limit = KERNEL_DS, \ | |
| 71995e4d LFT |
64 | } |
| 65 | ||
| 66 | #define init_thread_info (init_thread_union.thread_info) | |
| 67 | #define init_stack (init_thread_union.stack) | |
| 68 | ||
| 69 | /* how to get the thread information struct from C */ | |
| 70 | static inline struct thread_info *current_thread_info(void) | |
| 71 | { | |
| 72 | register unsigned long sp asm("sp"); | |
| 73 | ||
| 74 | return (struct thread_info *)(sp & ~(THREAD_SIZE - 1)); | |
| 75 | } | |
| 76 | #endif /* !__ASSEMBLY__ */ | |
| 77 | ||
| 78 | /* | |
| 79 | * thread information flags | |
| 80 | * - these are process state flags that various assembly files may need to | |
| 81 | * access | |
| 82 | * - pending work-to-be-done flags are in LSW | |
| 83 | * - other flags in MSW | |
| 84 | */ | |
| 85 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ | |
| 86 | #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ | |
| 87 | #define TIF_SIGPENDING 2 /* signal pending */ | |
| 88 | #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ | |
| 89 | #define TIF_MEMDIE 4 /* is terminating due to OOM killer */ | |
| 90 | #define TIF_SECCOMP 5 /* secure computing */ | |
| 91 | #define TIF_SYSCALL_AUDIT 6 /* syscall auditing active */ | |
| 92 | #define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */ | |
| 93 | ||
| 94 | #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling | |
| 95 | TIF_NEED_RESCHED */ | |
| 96 | ||
| 97 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) | |
| 98 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) | |
| 99 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) | |
| 100 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) | |
| 101 | #define _TIF_SECCOMP (1 << TIF_SECCOMP) | |
| 102 | #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) | |
| 103 | #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) | |
| 104 | #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) | |
| 105 | ||
| 106 | /* work to do on interrupt/exception return */ | |
| 107 | #define _TIF_WORK_MASK 0x0000FFFE | |
| 108 | ||
| 109 | /* work to do on any return to u-space */ | |
| 110 | # define _TIF_ALLWORK_MASK 0x0000FFFF | |
| 111 | ||
| 112 | #endif /* __KERNEL__ */ | |
| 113 | ||
| 114 | #endif /* _ASM_NIOS2_THREAD_INFO_H */ |