| /* thread_info.h: CRIS low-level thread information |
| * |
| * Copyright (C) 2002 David Howells (dhowells@redhat.com) |
| * - Incorporating suggestions made by Linus Torvalds and Dave Miller |
| * |
| * CRIS port by Axis Communications |
| */ |
| |
| #ifndef _ASM_THREAD_INFO_H |
| #define _ASM_THREAD_INFO_H |
| |
| #ifdef __KERNEL__ |
| |
| #ifndef __ASSEMBLY__ |
| #include <asm/types.h> |
| #include <asm/processor.h> |
| #include <arch/thread_info.h> |
| #include <asm/segment.h> |
| #endif |
| |
| |
| /* |
| * 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 |
| */ |
| #ifndef __ASSEMBLY__ |
| struct thread_info { |
| struct task_struct *task; /* main task structure */ |
| struct exec_domain *exec_domain; /* execution domain */ |
| unsigned long flags; /* low level flags */ |
| __u32 cpu; /* current CPU */ |
| int preempt_count; /* 0 => preemptable, <0 => BUG */ |
| __u32 tls; /* TLS for this thread */ |
| |
| mm_segment_t addr_limit; /* thread address space: |
| 0-0xBFFFFFFF for user-thead |
| 0-0xFFFFFFFF for kernel-thread |
| */ |
| struct restart_block restart_block; |
| __u8 supervisor_stack[0]; |
| }; |
| |
| #endif |
| |
| #define PREEMPT_ACTIVE 0x10000000 |
| |
| /* |
| * macros/functions for gaining access to the thread information structure |
| */ |
| #ifndef __ASSEMBLY__ |
| #define INIT_THREAD_INFO(tsk) \ |
| { \ |
| .task = &tsk, \ |
| .exec_domain = &default_exec_domain, \ |
| .flags = 0, \ |
| .cpu = 0, \ |
| .preempt_count = INIT_PREEMPT_COUNT, \ |
| .addr_limit = KERNEL_DS, \ |
| .restart_block = { \ |
| .fn = do_no_restart_syscall, \ |
| }, \ |
| } |
| |
| #define init_thread_info (init_thread_union.thread_info) |
| |
| #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_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_MEMDIE 17 /* is terminating due to OOM killer */ |
| |
| #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_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK) |
| #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) |
| |
| #define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */ |
| #define _TIF_ALLWORK_MASK 0x0000FFFF /* work to do on any return to u-space */ |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* _ASM_THREAD_INFO_H */ |