/* * Copyright (C) 2002-2003 Hewlett-Packard Co * David Mosberger-Tang */ #ifndef _ASM_IA64_THREAD_INFO_H #define _ASM_IA64_THREAD_INFO_H #ifndef ASM_OFFSETS_C #include #endif #include #include #define PREEMPT_ACTIVE_BIT 30 #define PREEMPT_ACTIVE (1 << PREEMPT_ACTIVE_BIT) #ifndef __ASSEMBLY__ /* * On IA-64, we want to keep the task structure and kernel stack together, so they can be * mapped by a single TLB entry and so they can be addressed by the "current" pointer * without having to do pointer masking. */ struct thread_info { struct task_struct *task; /* XXX not really needed, except for dup_task_struct() */ struct exec_domain *exec_domain;/* execution domain */ __u32 flags; /* thread_info flags (see TIF_*) */ __u32 cpu; /* current CPU */ __u32 last_cpu; /* Last CPU thread ran on */ __u32 status; /* Thread synchronous flags */ mm_segment_t addr_limit; /* user-level address space limit */ int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */ struct restart_block restart_block; #ifdef CONFIG_VIRT_CPU_ACCOUNTING __u64 ac_stamp; __u64 ac_leave; __u64 ac_stime; __u64 ac_utime; #endif }; #define THREAD_SIZE KERNEL_STACK_SIZE #define INIT_THREAD_INFO(tsk) \ { \ .task = &tsk, \ .exec_domain = &default_exec_domain, \ .flags = 0, \ .cpu = 0, \ .addr_limit = KERNEL_DS, \ .preempt_count = INIT_PREEMPT_COUNT, \ .restart_block = { \ .fn = do_no_restart_syscall, \ }, \ } #ifndef ASM_OFFSETS_C /* how to get the thread information struct from C */ #define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE)) #define alloc_thread_info_node(tsk, node) \ ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) #define task_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) #else #define current_thread_info() ((struct thread_info *) 0) #define alloc_thread_info_node(tsk, node) ((struct thread_info *) 0) #define task_thread_info(tsk) ((struct thread_info *) 0) #endif #define free_thread_info(ti) /* nothing */ #define task_stack_page(tsk) ((void *)(tsk)) #define __HAVE_THREAD_FUNCTIONS #ifdef CONFIG_VIRT_CPU_ACCOUNTING #define setup_thread_stack(p, org) \ *task_thread_info(p) = *task_thread_info(org); \ task_thread_info(p)->ac_stime = 0; \ task_thread_info(p)->ac_utime = 0; \ task_thread_info(p)->task = (p); #else #define setup_thread_stack(p, org) \ *task_thread_info(p) = *task_thread_info(org); \ task_thread_info(p)->task = (p); #endif #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET) #define alloc_task_struct_node(node) \ ({ \ struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP, \ KERNEL_STACK_SIZE_ORDER); \ struct task_struct *ret = page ? page_address(page) : NULL; \ \ ret; \ }) #define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER) #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 least-significant 16 bits, other flags * in top 16 bits */ #define TIF_SIGPENDING 0 /* signal pending */ #define TIF_NEED_RESCHED 1 /* rescheduling necessary */ #define TIF_SYSCALL_TRACE 2 /* syscall trace active */ #define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */ #define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */ #define TIF_NOTIFY_RESUME 6 /* resumption notification requested */ #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_MCA_INIT 18 /* this task is processing MCA or INIT */ #define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */ #define TIF_RESTORE_RSE 21 /* user RBS is newer than kernel RBS */ #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) #define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP) #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) #define _TIF_MCA_INIT (1 << TIF_MCA_INIT) #define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED) #define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE) /* "work to do on user-return" bits */ #define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\ _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE) /* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */ #define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)) #define TS_POLLING 1 /* true if in idle loop and not sleeping */ #define TS_RESTORE_SIGMASK 2 /* restore signal mask in do_signal() */ #define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING) #ifndef __ASSEMBLY__ #define HAVE_SET_RESTORE_SIGMASK 1 static inline void set_restore_sigmask(void) { struct thread_info *ti = current_thread_info(); ti->status |= TS_RESTORE_SIGMASK; set_bit(TIF_SIGPENDING, &ti->flags); } static inline void clear_restore_sigmask(void) { current_thread_info()->status &= ~TS_RESTORE_SIGMASK; } static inline bool test_restore_sigmask(void) { return current_thread_info()->status & TS_RESTORE_SIGMASK; } static inline bool test_and_clear_restore_sigmask(void) { struct thread_info *ti = current_thread_info(); if (!(ti->status & TS_RESTORE_SIGMASK)) return false; ti->status &= ~TS_RESTORE_SIGMASK; return true; } #endif /* !__ASSEMBLY__ */ #endif /* _ASM_IA64_THREAD_INFO_H */