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	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 */