[deliverable/linux.git] / arch / sparc / include / asm / thread_info_32.h

/*
 * thread_info.h: sparc low-level thread information
 * adapted from the ppc version by Pete Zaitcev, which was
 * adapted from the i386 version by Paul Mackerras
 *
 * Copyright (C) 2002  David Howells (dhowells@redhat.com)
 * Copyright (c) 2002  Pete Zaitcev (zaitcev@yahoo.com)
 * - Incorporating suggestions made by Linus Torvalds and Dave Miller
 */

#ifndef _ASM_THREAD_INFO_H
#define _ASM_THREAD_INFO_H

#ifdef __KERNEL__

#ifndef __ASSEMBLY__

#include <asm/ptrace.h>
#include <asm/page.h>

/*
 * Low level task data.
 *
 * If you change this, change the TI_* offsets below to match.
 */
#define NSWINS 8
struct thread_info {
	unsigned long		uwinmask;
	struct task_struct	*task;		/* main task structure */
	struct exec_domain	*exec_domain;	/* execution domain */
	unsigned long		flags;		/* low level flags */
	int			cpu;		/* cpu we're on */
	int			preempt_count;	/* 0 => preemptable,
						   <0 => BUG */
	int			softirq_count;
	int			hardirq_count;

	/* Context switch saved kernel state. */
	unsigned long ksp;	/* ... ksp __attribute__ ((aligned (8))); */
	unsigned long kpc;
	unsigned long kpsr;
	unsigned long kwim;

	/* A place to store user windows and stack pointers
	 * when the stack needs inspection.
	 */
	struct reg_window32	reg_window[NSWINS];	/* align for ldd! */
	unsigned long		rwbuf_stkptrs[NSWINS];
	unsigned long		w_saved;

	struct restart_block	restart_block;
};

/*
 * macros/functions for gaining access to the thread information structure
 */
#define INIT_THREAD_INFO(tsk)				\
{							\
	.uwinmask	=	0,			\
	.task		=	&tsk,			\
	.exec_domain	=	&default_exec_domain,	\
	.flags		=	0,			\
	.cpu		=	0,			\
	.preempt_count	=	INIT_PREEMPT_COUNT,	\
	.restart_block	= {				\
		.fn	=	do_no_restart_syscall,	\
	},						\
}

#define init_thread_info	(init_thread_union.thread_info)
#define init_stack		(init_thread_union.stack)

/* how to get the thread information struct from C */
register struct thread_info *current_thread_info_reg asm("g6");
#define current_thread_info()   (current_thread_info_reg)

/*
 * thread information allocation
 */
#define THREAD_SIZE_ORDER  1

#endif /* __ASSEMBLY__ */

/* Size of kernel stack for each process */
#define THREAD_SIZE		(2 * PAGE_SIZE)

/*
 * Offsets in thread_info structure, used in assembly code
 * The "#define REGWIN_SZ 0x40" was abolished, so no multiplications.
 */
#define TI_UWINMASK	0x00	/* uwinmask */
#define TI_TASK		0x04
#define TI_EXECDOMAIN	0x08	/* exec_domain */
#define TI_FLAGS	0x0c
#define TI_CPU		0x10
#define TI_PREEMPT	0x14	/* preempt_count */
#define TI_SOFTIRQ	0x18	/* softirq_count */
#define TI_HARDIRQ	0x1c	/* hardirq_count */
#define TI_KSP		0x20	/* ksp */
#define TI_KPC		0x24	/* kpc (ldd'ed with kpc) */
#define TI_KPSR		0x28	/* kpsr */
#define TI_KWIM		0x2c	/* kwim (ldd'ed with kpsr) */
#define TI_REG_WINDOW	0x30
#define TI_RWIN_SPTRS	0x230
#define TI_W_SAVED	0x250
/* #define TI_RESTART_BLOCK 0x25n */ /* Nobody cares */

#define PREEMPT_ACTIVE		0x4000000

/*
 * thread information flag bit numbers
 */
#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
#define TIF_NOTIFY_RESUME	1	/* callback before returning to user */
#define TIF_SIGPENDING		2	/* signal pending */
#define TIF_NEED_RESCHED	3	/* rescheduling necessary */
#define TIF_RESTORE_SIGMASK	4	/* restore signal mask in do_signal() */
#define TIF_USEDFPU		8	/* FPU was used by this task
					 * this quantum (SMP) */
#define TIF_POLLING_NRFLAG	9	/* true if poll_idle() is polling
					 * TIF_NEED_RESCHED */
#define TIF_MEMDIE		10	/* is terminating due to OOM killer */

/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
#define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
#define _TIF_RESTORE_SIGMASK	(1<<TIF_RESTORE_SIGMASK)
#define _TIF_USEDFPU		(1<<TIF_USEDFPU)
#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)

#define _TIF_DO_NOTIFY_RESUME_MASK	(_TIF_NOTIFY_RESUME | \
					 _TIF_SIGPENDING)

#endif /* __KERNEL__ */

#endif /* _ASM_THREAD_INFO_H */
Commit	Line	Data
f5e706ad SR	1	/*
	2	* thread_info.h: sparc low-level thread information
	3	* adapted from the ppc version by Pete Zaitcev, which was
	4	* adapted from the i386 version by Paul Mackerras
	5	*
	6	* Copyright (C) 2002 David Howells (dhowells@redhat.com)
	7	* Copyright (c) 2002 Pete Zaitcev (zaitcev@yahoo.com)
	8	* - Incorporating suggestions made by Linus Torvalds and Dave Miller
	9	*/
	10
	11	#ifndef _ASM_THREAD_INFO_H
	12	#define _ASM_THREAD_INFO_H
	13
	14	#ifdef __KERNEL__
	15
	16	#ifndef __ASSEMBLY__
	17
f5e706ad SR	18	#include <asm/ptrace.h>
	19	#include <asm/page.h>
	20
	21	/*
	22	* Low level task data.
	23	*
	24	* If you change this, change the TI_* offsets below to match.
	25	*/
	26	#define NSWINS 8
	27	struct thread_info {
	28	unsigned long uwinmask;
	29	struct task_struct task; / main task structure */
	30	struct exec_domain exec_domain; / execution domain */
	31	unsigned long flags; /* low level flags */
	32	int cpu; /* cpu we're on */
	33	int preempt_count; /* 0 => preemptable,
	34	<0 => BUG */
	35	int softirq_count;
	36	int hardirq_count;
	37
	38	/* Context switch saved kernel state. */
	39	unsigned long ksp; /* ... ksp __attribute__ ((aligned (8))); */
	40	unsigned long kpc;
	41	unsigned long kpsr;
	42	unsigned long kwim;
	43
	44	/* A place to store user windows and stack pointers
	45	* when the stack needs inspection.
	46	*/
4d7b92ad	47	struct reg_window32 reg_window[NSWINS]; /* align for ldd! */
f5e706ad SR	48	unsigned long rwbuf_stkptrs[NSWINS];
	49	unsigned long w_saved;
	50
	51	struct restart_block restart_block;
	52	};
	53
	54	/*
	55	* macros/functions for gaining access to the thread information structure
f5e706ad SR	56	*/
	57	#define INIT_THREAD_INFO(tsk) \
	58	{ \
	59	.uwinmask = 0, \
	60	.task = &tsk, \
	61	.exec_domain = &default_exec_domain, \
	62	.flags = 0, \
	63	.cpu = 0, \
c99e6efe	64	.preempt_count = INIT_PREEMPT_COUNT, \
f5e706ad SR	65	.restart_block = { \
	66	.fn = do_no_restart_syscall, \
	67	}, \
	68	}
	69
	70	#define init_thread_info (init_thread_union.thread_info)
	71	#define init_stack (init_thread_union.stack)
	72
	73	/* how to get the thread information struct from C */
	74	register struct thread_info *current_thread_info_reg asm("g6");
	75	#define current_thread_info() (current_thread_info_reg)
	76
	77	/*
	78	* thread information allocation
	79	*/
29af0eba	80	#define THREAD_SIZE_ORDER 1
f5e706ad SR	81
	82	#endif /* __ASSEMBLY__ */
	83
29af0eba	84	/* Size of kernel stack for each process */
a4b4f437	85	#define THREAD_SIZE (2 * PAGE_SIZE)
f5e706ad SR	86
	87	/*
	88	* Offsets in thread_info structure, used in assembly code
	89	* The "#define REGWIN_SZ 0x40" was abolished, so no multiplications.
	90	*/
	91	#define TI_UWINMASK 0x00 /* uwinmask */
	92	#define TI_TASK 0x04
	93	#define TI_EXECDOMAIN 0x08 /* exec_domain */
	94	#define TI_FLAGS 0x0c
	95	#define TI_CPU 0x10
	96	#define TI_PREEMPT 0x14 /* preempt_count */
	97	#define TI_SOFTIRQ 0x18 /* softirq_count */
	98	#define TI_HARDIRQ 0x1c /* hardirq_count */
	99	#define TI_KSP 0x20 /* ksp */
	100	#define TI_KPC 0x24 /* kpc (ldd'ed with kpc) */
	101	#define TI_KPSR 0x28 /* kpsr */
	102	#define TI_KWIM 0x2c /* kwim (ldd'ed with kpsr) */
	103	#define TI_REG_WINDOW 0x30
	104	#define TI_RWIN_SPTRS 0x230
	105	#define TI_W_SAVED 0x250
	106	/* #define TI_RESTART_BLOCK 0x25n / / Nobody cares */
	107
	108	#define PREEMPT_ACTIVE 0x4000000
	109
	110	/*
	111	* thread information flag bit numbers
	112	*/
	113	#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
5a157d5b	114	#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
f5e706ad SR	115	#define TIF_SIGPENDING 2 /* signal pending */
	116	#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
	117	#define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */
	118	#define TIF_USEDFPU 8 /* FPU was used by this task
	119	* this quantum (SMP) */
	120	#define TIF_POLLING_NRFLAG 9 /* true if poll_idle() is polling
	121	* TIF_NEED_RESCHED */
0ddc9324	122	#define TIF_MEMDIE 10 /* is terminating due to OOM killer */
f5e706ad SR	123
	124	/* as above, but as bit values */
	125	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
5a157d5b	126	#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
f5e706ad SR	127	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
	128	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
	129	#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
	130	#define _TIF_USEDFPU (1<<TIF_USEDFPU)
	131	#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
	132
5a157d5b	133	#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME \| \
6fd84c08	134	_TIF_SIGPENDING)
5a157d5b	135
f5e706ad SR	136	#endif /* __KERNEL__ */
	137
	138	#endif /* _ASM_THREAD_INFO_H */