1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2002-2003 Hewlett-Packard Co 4 * David Mosberger-Tang <davidm@hpl.hp.com> 5 */ 6 #ifndef _ASM_IA64_THREAD_INFO_H 7 #define _ASM_IA64_THREAD_INFO_H 8 9 #ifndef ASM_OFFSETS_C 10 #include <asm/asm-offsets.h> 11 #endif 12 #include <asm/processor.h> 13 #include <asm/ptrace.h> 14 15 #define THREAD_SIZE KERNEL_STACK_SIZE 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 __u32 flags; /* thread_info flags (see TIF_*) */ 27 __u32 cpu; /* current CPU */ 28 __u32 last_cpu; /* Last CPU thread ran on */ 29 __u32 status; /* Thread synchronous flags */ 30 mm_segment_t addr_limit; /* user-level address space limit */ 31 int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */ 32 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 33 __u64 utime; 34 __u64 stime; 35 __u64 gtime; 36 __u64 hardirq_time; 37 __u64 softirq_time; 38 __u64 idle_time; 39 __u64 ac_stamp; 40 __u64 ac_leave; 41 __u64 ac_stime; 42 __u64 ac_utime; 43 #endif 44 }; 45 46 #define INIT_THREAD_INFO(tsk) \ 47 { \ 48 .task = &tsk, \ 49 .flags = 0, \ 50 .cpu = 0, \ 51 .addr_limit = KERNEL_DS, \ 52 .preempt_count = INIT_PREEMPT_COUNT, \ 53 } 54 55 #ifndef ASM_OFFSETS_C 56 /* how to get the thread information struct from C */ 57 #define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE)) 58 #define alloc_thread_stack_node(tsk, node) \ 59 ((unsigned long *) ((char *) (tsk) + IA64_TASK_SIZE)) 60 #define task_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) 61 #else 62 #define current_thread_info() ((struct thread_info *) 0) 63 #define alloc_thread_stack_node(tsk, node) ((unsigned long *) 0) 64 #define task_thread_info(tsk) ((struct thread_info *) 0) 65 #endif 66 #define free_thread_stack(tsk) /* nothing */ 67 #define task_stack_page(tsk) ((void *)(tsk)) 68 69 #define __HAVE_THREAD_FUNCTIONS 70 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 71 #define setup_thread_stack(p, org) \ 72 *task_thread_info(p) = *task_thread_info(org); \ 73 task_thread_info(p)->ac_stime = 0; \ 74 task_thread_info(p)->ac_utime = 0; \ 75 task_thread_info(p)->task = (p); 76 #else 77 #define setup_thread_stack(p, org) \ 78 *task_thread_info(p) = *task_thread_info(org); \ 79 task_thread_info(p)->task = (p); 80 #endif 81 #define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET) 82 83 #define alloc_task_struct_node(node) \ 84 ({ \ 85 struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP, \ 86 KERNEL_STACK_SIZE_ORDER); \ 87 struct task_struct *ret = page ? page_address(page) : NULL; \ 88 \ 89 ret; \ 90 }) 91 #define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER) 92 93 #endif /* !__ASSEMBLY */ 94 95 /* 96 * thread information flags 97 * - these are process state flags that various assembly files may need to access 98 * - pending work-to-be-done flags are in least-significant 16 bits, other flags 99 * in top 16 bits 100 */ 101 #define TIF_SIGPENDING 0 /* signal pending */ 102 #define TIF_NEED_RESCHED 1 /* rescheduling necessary */ 103 #define TIF_SYSCALL_TRACE 2 /* syscall trace active */ 104 #define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */ 105 #define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */ 106 #define TIF_NOTIFY_RESUME 6 /* resumption notification requested */ 107 #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ 108 #define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */ 109 #define TIF_DB_DISABLED 19 /* debug trap disabled for fsyscall */ 110 #define TIF_RESTORE_RSE 21 /* user RBS is newer than kernel RBS */ 111 #define TIF_POLLING_NRFLAG 22 /* idle is polling for TIF_NEED_RESCHED */ 112 113 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 114 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) 115 #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) 116 #define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP) 117 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 118 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 119 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 120 #define _TIF_MCA_INIT (1 << TIF_MCA_INIT) 121 #define _TIF_DB_DISABLED (1 << TIF_DB_DISABLED) 122 #define _TIF_RESTORE_RSE (1 << TIF_RESTORE_RSE) 123 #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) 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 #endif /* _ASM_IA64_THREAD_INFO_H */ 132