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 __u32 flags; /* thread_info flags (see TIF_*) */ 24 __u32 cpu; /* current CPU */ 25 __u32 last_cpu; /* Last CPU thread ran on */ 26 __u32 status; /* Thread synchronous flags */ 27 mm_segment_t addr_limit; /* user-level address space limit */ 28 int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */ 29 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 30 __u64 ac_stamp; 31 __u64 ac_leave; 32 __u64 ac_stime; 33 __u64 ac_utime; 34 #endif 35 }; 36 37 #define THREAD_SIZE KERNEL_STACK_SIZE 38 39 #define INIT_THREAD_INFO(tsk) \ 40 { \ 41 .task = &tsk, \ 42 .flags = 0, \ 43 .cpu = 0, \ 44 .addr_limit = KERNEL_DS, \ 45 .preempt_count = INIT_PREEMPT_COUNT, \ 46 } 47 48 #ifndef ASM_OFFSETS_C 49 /* how to get the thread information struct from C */ 50 #define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE)) 51 #define alloc_thread_info_node(tsk, node) \ 52 ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) 53 #define task_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) 54 #else 55 #define current_thread_info() ((struct thread_info *) 0) 56 #define alloc_thread_info_node(tsk, node) ((struct thread_info *) 0) 57 #define task_thread_info(tsk) ((struct thread_info *) 0) 58 #endif 59 #define free_thread_info(ti) /* nothing */ 60 #define task_stack_page(tsk) ((void *)(tsk)) 61 62 #define __HAVE_THREAD_FUNCTIONS 63 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 64 #define setup_thread_stack(p, org) \ 65 *task_thread_info(p) = *task_thread_info(org); \ 66 task_thread_info(p)->ac_stime = 0; \ 67 task_thread_info(p)->ac_utime = 0; \ 68 task_thread_info(p)->task = (p); 69 #else 70 #define setup_thread_stack(p, org) \ 71 *task_thread_info(p) = *task_thread_info(org); \ 72 task_thread_info(p)->task = (p); 73 #endif 74 #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET) 75 76 #define alloc_task_struct_node(node) \ 77 ({ \ 78 struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP, \ 79 KERNEL_STACK_SIZE_ORDER); \ 80 struct task_struct *ret = page ? page_address(page) : NULL; \ 81 \ 82 ret; \ 83 }) 84 #define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER) 85 86 #endif /* !__ASSEMBLY */ 87 88 /* 89 * thread information flags 90 * - these are process state flags that various assembly files may need to access 91 * - pending work-to-be-done flags are in least-significant 16 bits, other flags 92 * in top 16 bits 93 */ 94 #define TIF_SIGPENDING 0 /* signal pending */ 95 #define TIF_NEED_RESCHED 1 /* rescheduling necessary */ 96 #define TIF_SYSCALL_TRACE 2 /* syscall trace active */ 97 #define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */ 98 #define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */ 99 #define TIF_NOTIFY_RESUME 6 /* resumption notification requested */ 100 #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ 101 #define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */ 102 #define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */ 103 #define TIF_RESTORE_RSE 21 /* user RBS is newer than kernel RBS */ 104 #define TIF_POLLING_NRFLAG 22 /* idle is polling for TIF_NEED_RESCHED */ 105 106 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 107 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) 108 #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) 109 #define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP) 110 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 111 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 112 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 113 #define _TIF_MCA_INIT (1 << TIF_MCA_INIT) 114 #define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED) 115 #define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE) 116 #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) 117 118 /* "work to do on user-return" bits */ 119 #define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\ 120 _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE) 121 /* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */ 122 #define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)) 123 124 #define TS_RESTORE_SIGMASK 2 /* restore signal mask in do_signal() */ 125 126 #ifndef __ASSEMBLY__ 127 #define HAVE_SET_RESTORE_SIGMASK 1 128 static inline void set_restore_sigmask(void) 129 { 130 struct thread_info *ti = current_thread_info(); 131 ti->status |= TS_RESTORE_SIGMASK; 132 WARN_ON(!test_bit(TIF_SIGPENDING, &ti->flags)); 133 } 134 static inline void clear_restore_sigmask(void) 135 { 136 current_thread_info()->status &= ~TS_RESTORE_SIGMASK; 137 } 138 static inline bool test_restore_sigmask(void) 139 { 140 return current_thread_info()->status & TS_RESTORE_SIGMASK; 141 } 142 static inline bool test_and_clear_restore_sigmask(void) 143 { 144 struct thread_info *ti = current_thread_info(); 145 if (!(ti->status & TS_RESTORE_SIGMASK)) 146 return false; 147 ti->status &= ~TS_RESTORE_SIGMASK; 148 return true; 149 } 150 #endif /* !__ASSEMBLY__ */ 151 152 #endif /* _ASM_IA64_THREAD_INFO_H */ 153