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 #ifndef __ASSEMBLY__ 15 16 /* 17 * On IA-64, we want to keep the task structure and kernel stack together, so they can be 18 * mapped by a single TLB entry and so they can be addressed by the "current" pointer 19 * without having to do pointer masking. 20 */ 21 struct thread_info { 22 struct task_struct *task; /* XXX not really needed, except for dup_task_struct() */ 23 struct exec_domain *exec_domain;/* execution domain */ 24 __u32 flags; /* thread_info flags (see TIF_*) */ 25 __u32 cpu; /* current CPU */ 26 __u32 last_cpu; /* Last CPU thread ran on */ 27 __u32 status; /* Thread synchronous flags */ 28 mm_segment_t addr_limit; /* user-level address space limit */ 29 int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */ 30 struct restart_block restart_block; 31 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 32 __u64 ac_stamp; 33 __u64 ac_leave; 34 __u64 ac_stime; 35 __u64 ac_utime; 36 #endif 37 }; 38 39 #define THREAD_SIZE KERNEL_STACK_SIZE 40 41 #define INIT_THREAD_INFO(tsk) \ 42 { \ 43 .task = &tsk, \ 44 .exec_domain = &default_exec_domain, \ 45 .flags = 0, \ 46 .cpu = 0, \ 47 .addr_limit = KERNEL_DS, \ 48 .preempt_count = INIT_PREEMPT_COUNT, \ 49 .restart_block = { \ 50 .fn = do_no_restart_syscall, \ 51 }, \ 52 } 53 54 #ifndef ASM_OFFSETS_C 55 /* how to get the thread information struct from C */ 56 #define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE)) 57 #define alloc_thread_info_node(tsk, node) \ 58 ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) 59 #define task_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) 60 #else 61 #define current_thread_info() ((struct thread_info *) 0) 62 #define alloc_thread_info_node(tsk, node) ((struct thread_info *) 0) 63 #define task_thread_info(tsk) ((struct thread_info *) 0) 64 #endif 65 #define free_thread_info(ti) /* nothing */ 66 #define task_stack_page(tsk) ((void *)(tsk)) 67 68 #define __HAVE_THREAD_FUNCTIONS 69 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 70 #define setup_thread_stack(p, org) \ 71 *task_thread_info(p) = *task_thread_info(org); \ 72 task_thread_info(p)->ac_stime = 0; \ 73 task_thread_info(p)->ac_utime = 0; \ 74 task_thread_info(p)->task = (p); 75 #else 76 #define setup_thread_stack(p, org) \ 77 *task_thread_info(p) = *task_thread_info(org); \ 78 task_thread_info(p)->task = (p); 79 #endif 80 #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET) 81 82 #define alloc_task_struct_node(node) \ 83 ({ \ 84 struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP, \ 85 KERNEL_STACK_SIZE_ORDER); \ 86 struct task_struct *ret = page ? page_address(page) : NULL; \ 87 \ 88 ret; \ 89 }) 90 #define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER) 91 92 #endif /* !__ASSEMBLY */ 93 94 /* 95 * thread information flags 96 * - these are process state flags that various assembly files may need to access 97 * - pending work-to-be-done flags are in least-significant 16 bits, other flags 98 * in top 16 bits 99 */ 100 #define TIF_SIGPENDING 0 /* signal pending */ 101 #define TIF_NEED_RESCHED 1 /* rescheduling necessary */ 102 #define TIF_SYSCALL_TRACE 2 /* syscall trace active */ 103 #define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */ 104 #define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */ 105 #define TIF_NOTIFY_RESUME 6 /* resumption notification requested */ 106 #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ 107 #define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */ 108 #define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */ 109 #define TIF_RESTORE_RSE 21 /* user RBS is newer than kernel RBS */ 110 #define TIF_POLLING_NRFLAG 22 /* idle is polling for TIF_NEED_RESCHED */ 111 112 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 113 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) 114 #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) 115 #define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP) 116 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 117 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 118 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 119 #define _TIF_MCA_INIT (1 << TIF_MCA_INIT) 120 #define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED) 121 #define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE) 122 #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) 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_RESTORE_SIGMASK 2 /* restore signal mask in do_signal() */ 131 132 #ifndef __ASSEMBLY__ 133 #define HAVE_SET_RESTORE_SIGMASK 1 134 static inline void set_restore_sigmask(void) 135 { 136 struct thread_info *ti = current_thread_info(); 137 ti->status |= TS_RESTORE_SIGMASK; 138 WARN_ON(!test_bit(TIF_SIGPENDING, &ti->flags)); 139 } 140 static inline void clear_restore_sigmask(void) 141 { 142 current_thread_info()->status &= ~TS_RESTORE_SIGMASK; 143 } 144 static inline bool test_restore_sigmask(void) 145 { 146 return current_thread_info()->status & TS_RESTORE_SIGMASK; 147 } 148 static inline bool test_and_clear_restore_sigmask(void) 149 { 150 struct thread_info *ti = current_thread_info(); 151 if (!(ti->status & TS_RESTORE_SIGMASK)) 152 return false; 153 ti->status &= ~TS_RESTORE_SIGMASK; 154 return true; 155 } 156 #endif /* !__ASSEMBLY__ */ 157 158 #endif /* _ASM_IA64_THREAD_INFO_H */ 159