[mirror_ubuntu-eoan-kernel.git] / include / asm-ia64 / thread_info.h

/*
 * Copyright (C) 2002-2003 Hewlett-Packard Co
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 */
#ifndef _ASM_IA64_THREAD_INFO_H
#define _ASM_IA64_THREAD_INFO_H

#ifndef ASM_OFFSETS_C
#include <asm/asm-offsets.h>
#endif
#include <asm/processor.h>
#include <asm/ptrace.h>

#define PREEMPT_ACTIVE_BIT 30
#define PREEMPT_ACTIVE	(1 << PREEMPT_ACTIVE_BIT)

#ifndef __ASSEMBLY__

/*
 * On IA-64, we want to keep the task structure and kernel stack together, so they can be
 * mapped by a single TLB entry and so they can be addressed by the "current" pointer
 * without having to do pointer masking.
 */
struct thread_info {
	struct task_struct *task;	/* XXX not really needed, except for dup_task_struct() */
	struct exec_domain *exec_domain;/* execution domain */
	__u32 flags;			/* thread_info flags (see TIF_*) */
	__u32 cpu;			/* current CPU */
	mm_segment_t addr_limit;	/* user-level address space limit */
	int preempt_count;		/* 0=premptable, <0=BUG; will also serve as bh-counter */
	struct restart_block restart_block;
	struct {
		int signo;
		int code;
		void __user *addr;
		unsigned long start_time;
		pid_t pid;
	} sigdelayed;			/* Saved information for TIF_SIGDELAYED */
};

#define THREAD_SIZE			KERNEL_STACK_SIZE

#define INIT_THREAD_INFO(tsk)			\
{						\
	.task		= &tsk,			\
	.exec_domain	= &default_exec_domain,	\
	.flags		= 0,			\
	.cpu		= 0,			\
	.addr_limit	= KERNEL_DS,		\
	.preempt_count	= 0,			\
	.restart_block = {			\
		.fn = do_no_restart_syscall,	\
	},					\
}

#ifndef ASM_OFFSETS_C
/* how to get the thread information struct from C */
#define current_thread_info()	((struct thread_info *) ((char *) current + IA64_TASK_SIZE))
#define alloc_thread_info(tsk)	((struct thread_info *) ((char *) (tsk) + IA64_TASK_SIZE))
#else
#define current_thread_info()	((struct thread_info *) 0)
#define alloc_thread_info(tsk)	((struct thread_info *) 0)
#endif
#define free_thread_info(ti)	/* nothing */

#define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR
#define alloc_task_struct()	((task_t *)__get_free_pages(GFP_KERNEL, KERNEL_STACK_SIZE_ORDER))
#define free_task_struct(tsk)	free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)

#endif /* !__ASSEMBLY */

/*
 * thread information flags
 * - these are process state flags that various assembly files may need to access
 * - pending work-to-be-done flags are in least-significant 16 bits, other flags
 *   in top 16 bits
 */
#define TIF_NOTIFY_RESUME	0	/* resumption notification requested */
#define TIF_SIGPENDING		1	/* signal pending */
#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
#define TIF_SYSCALL_TRACE	3	/* syscall trace active */
#define TIF_SYSCALL_AUDIT	4	/* syscall auditing active */
#define TIF_SIGDELAYED		5	/* signal delayed from MCA/INIT/NMI/PMI context */
#define TIF_POLLING_NRFLAG	16	/* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE		17
#define TIF_MCA_INIT		18	/* this task is processing MCA or INIT */

#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
#define _TIF_SYSCALL_TRACEAUDIT	(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
#define _TIF_SIGDELAYED	(1 << TIF_SIGDELAYED)
#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
#define _TIF_MCA_INIT		(1 << TIF_MCA_INIT)

/* "work to do on user-return" bits */
#define TIF_ALLWORK_MASK	(_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SIGDELAYED)
/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
#define TIF_WORK_MASK		(TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))

#endif /* _ASM_IA64_THREAD_INFO_H */
Commit	Line	Data
1da177e4 LT	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
82f1b07b	8	#ifndef ASM_OFFSETS_C
0013a854	9	#include <asm/asm-offsets.h>
82f1b07b	10	#endif
1da177e4 LT	11	#include <asm/processor.h>
	12	#include <asm/ptrace.h>
	13
	14	#define PREEMPT_ACTIVE_BIT 30
	15	#define PREEMPT_ACTIVE (1 << PREEMPT_ACTIVE_BIT)
	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	struct exec_domain exec_domain;/ execution domain */
	27	__u32 flags; /* thread_info flags (see TIF_) /
	28	__u32 cpu; /* current CPU */
	29	mm_segment_t addr_limit; /* user-level address space limit */
dcd497f9	30	int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */
1da177e4 LT	31	struct restart_block restart_block;
	32	struct {
	33	int signo;
	34	int code;
	35	void __user *addr;
	36	unsigned long start_time;
	37	pid_t pid;
	38	} sigdelayed; /* Saved information for TIF_SIGDELAYED */
	39	};
	40
	41	#define THREAD_SIZE KERNEL_STACK_SIZE
	42
	43	#define INIT_THREAD_INFO(tsk) \
	44	{ \
	45	.task = &tsk, \
	46	.exec_domain = &default_exec_domain, \
	47	.flags = 0, \
	48	.cpu = 0, \
	49	.addr_limit = KERNEL_DS, \
	50	.preempt_count = 0, \
	51	.restart_block = { \
	52	.fn = do_no_restart_syscall, \
	53	}, \
	54	}
	55
82f1b07b	56	#ifndef ASM_OFFSETS_C
1da177e4 LT	57	/* how to get the thread information struct from C */
	58	#define current_thread_info() ((struct thread_info ) ((char ) current + IA64_TASK_SIZE))
	59	#define alloc_thread_info(tsk) ((struct thread_info ) ((char ) (tsk) + IA64_TASK_SIZE))
82f1b07b TL	60	#else
	61	#define current_thread_info() ((struct thread_info *) 0)
	62	#define alloc_thread_info(tsk) ((struct thread_info *) 0)
	63	#endif
1da177e4 LT	64	#define free_thread_info(ti) /* nothing */
	65
	66	#define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR
	67	#define alloc_task_struct() ((task_t *)__get_free_pages(GFP_KERNEL, KERNEL_STACK_SIZE_ORDER))
	68	#define free_task_struct(tsk) free_pages((unsigned long) (tsk), KERNEL_STACK_SIZE_ORDER)
	69
	70	#endif /* !__ASSEMBLY */
	71
	72	/*
	73	* thread information flags
	74	* - these are process state flags that various assembly files may need to access
	75	* - pending work-to-be-done flags are in least-significant 16 bits, other flags
	76	* in top 16 bits
	77	*/
	78	#define TIF_NOTIFY_RESUME 0 /* resumption notification requested */
	79	#define TIF_SIGPENDING 1 /* signal pending */
	80	#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
	81	#define TIF_SYSCALL_TRACE 3 /* syscall trace active */
	82	#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
	83	#define TIF_SIGDELAYED 5 /* signal delayed from MCA/INIT/NMI/PMI context */
	84	#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
	85	#define TIF_MEMDIE 17
e619ae0b	86	#define TIF_MCA_INIT 18 /* this task is processing MCA or INIT */
1da177e4 LT	87
	88	#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
	89	#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
	90	#define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE\|_TIF_SYSCALL_AUDIT)
	91	#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
	92	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
	93	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
	94	#define _TIF_SIGDELAYED (1 << TIF_SIGDELAYED)
	95	#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
e619ae0b	96	#define _TIF_MCA_INIT (1 << TIF_MCA_INIT)
1da177e4 LT	97
	98	/* "work to do on user-return" bits */
	99	#define TIF_ALLWORK_MASK (_TIF_NOTIFY_RESUME\|_TIF_SIGPENDING\|_TIF_NEED_RESCHED\|_TIF_SYSCALL_TRACE\|_TIF_SYSCALL_AUDIT\|_TIF_SIGDELAYED)
	100	/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */
	101	#define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE\|_TIF_SYSCALL_AUDIT))
	102
	103	#endif /* _ASM_IA64_THREAD_INFO_H */