| /* |
| * NiosII low-level thread information |
| * |
| * Copyright (C) 2011 Tobias Klauser <tklauser@distanz.ch> |
| * Copyright (C) 2004 Microtronix Datacom Ltd. |
| * |
| * Based on asm/thread_info_no.h from m68k which is: |
| * |
| * Copyright (C) 2002 David Howells <dhowells@redhat.com> |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| */ |
| |
| #ifndef _ASM_NIOS2_THREAD_INFO_H |
| #define _ASM_NIOS2_THREAD_INFO_H |
| |
| #ifdef __KERNEL__ |
| |
| /* |
| * Size of the kernel stack for each process. |
| */ |
| #define THREAD_SIZE_ORDER 1 |
| #define THREAD_SIZE 8192 /* 2 * PAGE_SIZE */ |
| |
| #ifndef __ASSEMBLY__ |
| |
| /* |
| * low level task data that entry.S needs immediate access to |
| * - this struct should fit entirely inside of one cache line |
| * - this struct shares the supervisor stack pages |
| * - if the contents of this structure are changed, the assembly constants |
| * must also be changed |
| */ |
| struct thread_info { |
| struct task_struct *task; /* main task structure */ |
| unsigned long flags; /* low level flags */ |
| __u32 cpu; /* current CPU */ |
| int preempt_count; /* 0 => preemptable,<0 => BUG */ |
| struct pt_regs *regs; |
| }; |
| |
| /* |
| * macros/functions for gaining access to the thread information structure |
| * |
| * preempt_count needs to be 1 initially, until the scheduler is functional. |
| */ |
| #define INIT_THREAD_INFO(tsk) \ |
| { \ |
| .task = &tsk, \ |
| .flags = 0, \ |
| .cpu = 0, \ |
| .preempt_count = INIT_PREEMPT_COUNT, \ |
| } |
| |
| /* how to get the thread information struct from C */ |
| static inline struct thread_info *current_thread_info(void) |
| { |
| register unsigned long sp asm("sp"); |
| |
| return (struct thread_info *)(sp & ~(THREAD_SIZE - 1)); |
| } |
| #endif /* !__ASSEMBLY__ */ |
| |
| /* |
| * thread information flags |
| * - these are process state flags that various assembly files may need to |
| * access |
| * - pending work-to-be-done flags are in LSW |
| * - other flags in MSW |
| */ |
| #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ |
| #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ |
| #define TIF_SIGPENDING 2 /* signal pending */ |
| #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ |
| #define TIF_MEMDIE 4 /* is terminating due to OOM killer */ |
| #define TIF_SECCOMP 5 /* secure computing */ |
| #define TIF_SYSCALL_AUDIT 6 /* syscall auditing active */ |
| #define TIF_NOTIFY_SIGNAL 7 /* signal notifications exist */ |
| #define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */ |
| |
| #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling |
| TIF_NEED_RESCHED */ |
| |
| #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) |
| #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) |
| #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) |
| #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) |
| #define _TIF_SECCOMP (1 << TIF_SECCOMP) |
| #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) |
| #define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL) |
| #define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) |
| #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) |
| |
| /* work to do on interrupt/exception return */ |
| #define _TIF_WORK_MASK 0x0000FFFE |
| |
| /* work to do on any return to u-space */ |
| # define _TIF_ALLWORK_MASK 0x0000FFFF |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* _ASM_NIOS2_THREAD_INFO_H */ |