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_NATIVE 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 #ifndef ASM_OFFSETS_C 58 /* how to get the thread information struct from C */ 59 #define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE)) 60 #define alloc_thread_info_node(tsk, node) \ 61 ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) 62 #define task_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) 63 #else 64 #define current_thread_info() ((struct thread_info *) 0) 65 #define alloc_thread_info_node(tsk, node) ((struct thread_info *) 0) 66 #define task_thread_info(tsk) ((struct thread_info *) 0) 67 #endif 68 #define free_thread_info(ti) /* nothing */ 69 #define task_stack_page(tsk) ((void *)(tsk)) 70 71 #define __HAVE_THREAD_FUNCTIONS 72 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 73 #define setup_thread_stack(p, org) \ 74 *task_thread_info(p) = *task_thread_info(org); \ 75 task_thread_info(p)->ac_stime = 0; \ 76 task_thread_info(p)->ac_utime = 0; \ 77 task_thread_info(p)->task = (p); 78 #else 79 #define setup_thread_stack(p, org) \ 80 *task_thread_info(p) = *task_thread_info(org); \ 81 task_thread_info(p)->task = (p); 82 #endif 83 #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET) 84 85 #define alloc_task_struct_node(node) \ 86 ({ \ 87 struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP, \ 88 KERNEL_STACK_SIZE_ORDER); \ 89 struct task_struct *ret = page ? page_address(page) : NULL; \ 90 \ 91 ret; \ 92 }) 93 #define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER) 94 95 #endif /* !__ASSEMBLY */ 96 97 /* 98 * thread information flags 99 * - these are process state flags that various assembly files may need to access 100 * - pending work-to-be-done flags are in least-significant 16 bits, other flags 101 * in top 16 bits 102 */ 103 #define TIF_SIGPENDING 0 /* signal pending */ 104 #define TIF_NEED_RESCHED 1 /* rescheduling necessary */ 105 #define TIF_SYSCALL_TRACE 2 /* syscall trace active */ 106 #define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */ 107 #define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */ 108 #define TIF_NOTIFY_RESUME 6 /* resumption notification requested */ 109 #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ 110 #define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */ 111 #define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */ 112 #define TIF_RESTORE_RSE 21 /* user RBS is newer than kernel RBS */ 113 114 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 115 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) 116 #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) 117 #define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP) 118 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 119 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 120 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 121 #define _TIF_MCA_INIT (1 << TIF_MCA_INIT) 122 #define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED) 123 #define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE) 124 125 /* "work to do on user-return" bits */ 126 #define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\ 127 _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE) 128 /* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */ 129 #define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)) 130 131 #define TS_POLLING 1 /* true if in idle loop and not sleeping */ 132 #define TS_RESTORE_SIGMASK 2 /* restore signal mask in do_signal() */ 133 134 #ifndef __ASSEMBLY__ 135 #define HAVE_SET_RESTORE_SIGMASK 1 136 static inline void set_restore_sigmask(void) 137 { 138 struct thread_info *ti = current_thread_info(); 139 ti->status |= TS_RESTORE_SIGMASK; 140 WARN_ON(!test_bit(TIF_SIGPENDING, &ti->flags)); 141 } 142 static inline void clear_restore_sigmask(void) 143 { 144 current_thread_info()->status &= ~TS_RESTORE_SIGMASK; 145 } 146 static inline bool test_restore_sigmask(void) 147 { 148 return current_thread_info()->status & TS_RESTORE_SIGMASK; 149 } 150 static inline bool test_and_clear_restore_sigmask(void) 151 { 152 struct thread_info *ti = current_thread_info(); 153 if (!(ti->status & TS_RESTORE_SIGMASK)) 154 return false; 155 ti->status &= ~TS_RESTORE_SIGMASK; 156 return true; 157 } 158 #endif /* !__ASSEMBLY__ */ 159 160 #endif /* _ASM_IA64_THREAD_INFO_H */ 161