1 /* 2 * Copyright (C) 2002-2003 Hewlett-Packard Co 3 * David Mosberger-Tang <davidm@hpl.hp.com> 4 */ 5 #ifndef _ASM_IA64_THREAD_INFO_H 6 #define _ASM_IA64_THREAD_INFO_H 7 8 #ifndef ASM_OFFSETS_C 9 #include <asm/asm-offsets.h> 10 #endif 11 #include <asm/processor.h> 12 #include <asm/ptrace.h> 13 14 #define PREEMPT_ACTIVE_BIT 30 15 #define PREEMPT_ACTIVE (1 << PREEMPT_ACTIVE_BIT) 16 17 #ifndef __ASSEMBLY__ 18 19 /* 20 * On IA-64, we want to keep the task structure and kernel stack together, so they can be 21 * mapped by a single TLB entry and so they can be addressed by the "current" pointer 22 * without having to do pointer masking. 23 */ 24 struct thread_info { 25 struct task_struct *task; /* XXX not really needed, except for dup_task_struct() */ 26 struct exec_domain *exec_domain;/* execution domain */ 27 __u32 flags; /* thread_info flags (see TIF_*) */ 28 __u32 cpu; /* current CPU */ 29 __u32 last_cpu; /* Last CPU thread ran on */ 30 __u32 status; /* Thread synchronous flags */ 31 mm_segment_t addr_limit; /* user-level address space limit */ 32 int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */ 33 struct restart_block restart_block; 34 #ifdef CONFIG_VIRT_CPU_ACCOUNTING 35 __u64 ac_stamp; 36 __u64 ac_leave; 37 __u64 ac_stime; 38 __u64 ac_utime; 39 #endif 40 }; 41 42 #define THREAD_SIZE KERNEL_STACK_SIZE 43 44 #define INIT_THREAD_INFO(tsk) \ 45 { \ 46 .task = &tsk, \ 47 .exec_domain = &default_exec_domain, \ 48 .flags = 0, \ 49 .cpu = 0, \ 50 .addr_limit = KERNEL_DS, \ 51 .preempt_count = INIT_PREEMPT_COUNT, \ 52 .restart_block = { \ 53 .fn = do_no_restart_syscall, \ 54 }, \ 55 } 56 57 #define __HAVE_ARCH_THREAD_INFO_ALLOCATOR 58 59 #ifndef ASM_OFFSETS_C 60 /* how to get the thread information struct from C */ 61 #define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE)) 62 #define alloc_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) 63 #define task_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) 64 #else 65 #define current_thread_info() ((struct thread_info *) 0) 66 #define alloc_thread_info(tsk) ((struct thread_info *) 0) 67 #define task_thread_info(tsk) ((struct thread_info *) 0) 68 #endif 69 #define free_thread_info(ti) /* nothing */ 70 #define task_stack_page(tsk) ((void *)(tsk)) 71 72 #define __HAVE_THREAD_FUNCTIONS 73 #ifdef CONFIG_VIRT_CPU_ACCOUNTING 74 #define setup_thread_stack(p, org) \ 75 *task_thread_info(p) = *task_thread_info(org); \ 76 task_thread_info(p)->ac_stime = 0; \ 77 task_thread_info(p)->ac_utime = 0; \ 78 task_thread_info(p)->task = (p); 79 #else 80 #define setup_thread_stack(p, org) \ 81 *task_thread_info(p) = *task_thread_info(org); \ 82 task_thread_info(p)->task = (p); 83 #endif 84 #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET) 85 86 #define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR 87 #define alloc_task_struct() ((struct task_struct *)__get_free_pages(GFP_KERNEL | __GFP_COMP, KERNEL_STACK_SIZE_ORDER)) 88 #define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER) 89 90 #endif /* !__ASSEMBLY */ 91 92 /* 93 * thread information flags 94 * - these are process state flags that various assembly files may need to access 95 * - pending work-to-be-done flags are in least-significant 16 bits, other flags 96 * in top 16 bits 97 */ 98 #define TIF_SIGPENDING 0 /* signal pending */ 99 #define TIF_NEED_RESCHED 1 /* rescheduling necessary */ 100 #define TIF_SYSCALL_TRACE 2 /* syscall trace active */ 101 #define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */ 102 #define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */ 103 #define TIF_NOTIFY_RESUME 6 /* resumption notification requested */ 104 #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */ 105 #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ 106 #define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */ 107 #define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */ 108 #define TIF_FREEZE 20 /* is freezing for suspend */ 109 #define TIF_RESTORE_RSE 21 /* user RBS is newer than kernel RBS */ 110 111 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 112 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) 113 #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) 114 #define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP) 115 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 116 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 117 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 118 #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) 119 #define _TIF_MCA_INIT (1 << TIF_MCA_INIT) 120 #define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED) 121 #define _TIF_FREEZE (1 << TIF_FREEZE) 122 #define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE) 123 124 /* "work to do on user-return" bits */ 125 #define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\ 126 _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE) 127 /* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */ 128 #define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)) 129 130 #define TS_POLLING 1 /* true if in idle loop and not sleeping */ 131 #define TS_RESTORE_SIGMASK 2 /* restore signal mask in do_signal() */ 132 133 #define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING) 134 135 #ifndef __ASSEMBLY__ 136 #define HAVE_SET_RESTORE_SIGMASK 1 137 static inline void set_restore_sigmask(void) 138 { 139 struct thread_info *ti = current_thread_info(); 140 ti->status |= TS_RESTORE_SIGMASK; 141 set_bit(TIF_SIGPENDING, &ti->flags); 142 } 143 #endif /* !__ASSEMBLY__ */ 144 145 #endif /* _ASM_IA64_THREAD_INFO_H */ 146