/* * Copyright (C) 2002-2003 Hewlett-Packard Co * David Mosberger-Tang <davidm@hpl.hp.com> */ #ifndef _ASM_IA64_THREAD_INFO_H #define _ASM_IA64_THREAD_INFO_H #ifndef ASM_OFFSETS_C #include <asm/asm-offsets.h> #endif #include <asm/processor.h> #include <asm/ptrace.h> #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; }; #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 = 0, \ .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(tsk) ((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(tsk) ((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 #define setup_thread_stack(p, org) \ *task_thread_info(p) = *task_thread_info(org); \ task_thread_info(p)->task = (p); #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET) #define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR #define alloc_task_struct() ((struct task_struct *)__get_free_pages(GFP_KERNEL | __GFP_COMP, KERNEL_STACK_SIZE_ORDER)) #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_NOTIFY_RESUME 0 /* resumption notification requested */ #define TIF_SIGPENDING 1 /* signal pending */ #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ #define TIF_SYSCALL_TRACE 3 /* syscall trace active */ #define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */ #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */ #define TIF_MEMDIE 17 #define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */ #define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */ #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) #define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT) #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) /* "work to do on user-return" bits */ #define TIF_ALLWORK_MASK (_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT) /* 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 tsk_is_polling(t) ((t)->thread_info->status & TS_POLLING) #endif /* _ASM_IA64_THREAD_INFO_H */