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 */ 24struct 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 int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */ 31#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 32 __u64 utime; 33 __u64 stime; 34 __u64 gtime; 35 __u64 hardirq_time; 36 __u64 softirq_time; 37 __u64 idle_time; 38 __u64 ac_stamp; 39 __u64 ac_leave; 40 __u64 ac_stime; 41 __u64 ac_utime; 42#endif 43}; 44 45#define INIT_THREAD_INFO(tsk) \ 46{ \ 47 .task = &tsk, \ 48 .flags = 0, \ 49 .cpu = 0, \ 50 .preempt_count = INIT_PREEMPT_COUNT, \ 51} 52 53#ifndef ASM_OFFSETS_C 54/* how to get the thread information struct from C */ 55#define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE)) 56#define arch_alloc_thread_stack_node(tsk, node) \ 57 ((unsigned long *) ((char *) (tsk) + IA64_TASK_SIZE)) 58#define task_thread_info(tsk) ((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE)) 59#else 60#define current_thread_info() ((struct thread_info *) 0) 61#define arch_alloc_thread_stack_node(tsk, node) ((unsigned long *) 0) 62#define task_thread_info(tsk) ((struct thread_info *) 0) 63#endif 64#define arch_free_thread_stack(tsk) /* nothing */ 65#define task_stack_page(tsk) ((void *)(tsk)) 66 67#define __HAVE_THREAD_FUNCTIONS 68#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 69#define setup_thread_stack(p, org) \ 70 *task_thread_info(p) = *task_thread_info(org); \ 71 task_thread_info(p)->ac_stime = 0; \ 72 task_thread_info(p)->ac_utime = 0; \ 73 task_thread_info(p)->task = (p); 74#else 75#define setup_thread_stack(p, org) \ 76 *task_thread_info(p) = *task_thread_info(org); \ 77 task_thread_info(p)->task = (p); 78#endif 79#define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET) 80 81#define alloc_task_struct_node(node) \ 82({ \ 83 struct page *page = alloc_pages_node(node, GFP_KERNEL | __GFP_COMP, \ 84 KERNEL_STACK_SIZE_ORDER); \ 85 struct task_struct *ret = page ? page_address(page) : NULL; \ 86 \ 87 ret; \ 88}) 89#define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER) 90 91#endif /* !__ASSEMBLY */ 92 93/* 94 * thread information flags 95 * - these are process state flags that various assembly files may need to access 96 * - pending work-to-be-done flags are in least-significant 16 bits, other flags 97 * in top 16 bits 98 */ 99#define TIF_SIGPENDING 0 /* signal pending */ 100#define TIF_NEED_RESCHED 1 /* rescheduling necessary */ 101#define TIF_SYSCALL_TRACE 2 /* syscall trace active */ 102#define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */ 103#define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */ 104#define TIF_NOTIFY_SIGNAL 5 /* signal notification exist */ 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_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL) 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|_TIF_NOTIFY_SIGNAL) 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