[deliverable/linux.git] / arch / unicore32 / include / asm / thread_info.h

/*
 * linux/arch/unicore32/include/asm/thread_info.h
 *
 * Code specific to PKUnity SoC and UniCore ISA
 *
 * Copyright (C) 2001-2010 GUAN Xue-tao
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __UNICORE_THREAD_INFO_H__
#define __UNICORE_THREAD_INFO_H__

#ifdef __KERNEL__

#include <linux/compiler.h>
#include <asm/fpstate.h>

#define THREAD_SIZE_ORDER	1
#define THREAD_SIZE		8192
#define THREAD_START_SP		(THREAD_SIZE - 8)

#ifndef __ASSEMBLY__

struct task_struct;
struct exec_domain;

#include <asm/types.h>

typedef struct {
	unsigned long seg;
} mm_segment_t;

struct cpu_context_save {
	__u32	r4;
	__u32	r5;
	__u32	r6;
	__u32	r7;
	__u32	r8;
	__u32	r9;
	__u32	r10;
	__u32	r11;
	__u32	r12;
	__u32	r13;
	__u32	r14;
	__u32	r15;
	__u32	r16;
	__u32	r17;
	__u32	r18;
	__u32	r19;
	__u32	r20;
	__u32	r21;
	__u32	r22;
	__u32	r23;
	__u32	r24;
	__u32	r25;
	__u32	r26;
	__u32	fp;
	__u32	sp;
	__u32	pc;
};

/*
 * low level task data that entry.S needs immediate access to.
 * __switch_to() assumes cpu_context follows immediately after cpu_domain.
 */
struct thread_info {
	unsigned long		flags;		/* low level flags */
	int			preempt_count;	/* 0 => preemptable */
						/* <0 => bug */
	mm_segment_t		addr_limit;	/* address limit */
	struct task_struct	*task;		/* main task structure */
	struct exec_domain	*exec_domain;	/* execution domain */
	__u32			cpu;		/* cpu */
	struct cpu_context_save	cpu_context;	/* cpu context */
	__u32			syscall;	/* syscall number */
	__u8			used_cp[16];	/* thread used copro */
#ifdef CONFIG_UNICORE_FPU_F64
	struct fp_state		fpstate __attribute__((aligned(8)));
#endif
};

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

#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
 */
static inline struct thread_info *current_thread_info(void) __attribute_const__;

static inline struct thread_info *current_thread_info(void)
{
	register unsigned long sp asm ("sp");
	return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
}

#define thread_saved_pc(tsk)	\
	((unsigned long)(task_thread_info(tsk)->cpu_context.pc))
#define thread_saved_sp(tsk)	\
	((unsigned long)(task_thread_info(tsk)->cpu_context.sp))
#define thread_saved_fp(tsk)	\
	((unsigned long)(task_thread_info(tsk)->cpu_context.fp))

#endif

/*
 * thread information flags:
 *  TIF_SYSCALL_TRACE	- syscall trace active
 *  TIF_SIGPENDING	- signal pending
 *  TIF_NEED_RESCHED	- rescheduling necessary
 *  TIF_NOTIFY_RESUME	- callback before returning to user
 */
#define TIF_SIGPENDING		0
#define TIF_NEED_RESCHED	1
#define TIF_NOTIFY_RESUME	2	/* callback before returning to user */
#define TIF_SYSCALL_TRACE	8
#define TIF_MEMDIE		18
#define TIF_RESTORE_SIGMASK	20

#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)

/*
 * Change these and you break ASM code in entry-common.S
 */
#define _TIF_WORK_MASK \
	(_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_NOTIFY_RESUME)

#endif /* __KERNEL__ */
#endif /* __UNICORE_THREAD_INFO_H__ */
Commit	Line	Data
f73670e8 G	1	/*
	2	* linux/arch/unicore32/include/asm/thread_info.h
	3	*
	4	* Code specific to PKUnity SoC and UniCore ISA
	5	*
	6	* Copyright (C) 2001-2010 GUAN Xue-tao
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12	#ifndef __UNICORE_THREAD_INFO_H__
	13	#define __UNICORE_THREAD_INFO_H__
	14
	15	#ifdef __KERNEL__
	16
	17	#include <linux/compiler.h>
	18	#include <asm/fpstate.h>
	19
	20	#define THREAD_SIZE_ORDER 1
	21	#define THREAD_SIZE 8192
	22	#define THREAD_START_SP (THREAD_SIZE - 8)
	23
	24	#ifndef __ASSEMBLY__
	25
	26	struct task_struct;
	27	struct exec_domain;
	28
	29	#include <asm/types.h>
	30
	31	typedef struct {
	32	unsigned long seg;
	33	} mm_segment_t;
	34
	35	struct cpu_context_save {
	36	__u32 r4;
	37	__u32 r5;
	38	__u32 r6;
	39	__u32 r7;
	40	__u32 r8;
	41	__u32 r9;
	42	__u32 r10;
	43	__u32 r11;
	44	__u32 r12;
	45	__u32 r13;
	46	__u32 r14;
	47	__u32 r15;
	48	__u32 r16;
	49	__u32 r17;
	50	__u32 r18;
	51	__u32 r19;
	52	__u32 r20;
	53	__u32 r21;
	54	__u32 r22;
	55	__u32 r23;
	56	__u32 r24;
	57	__u32 r25;
	58	__u32 r26;
	59	__u32 fp;
	60	__u32 sp;
	61	__u32 pc;
	62	};
	63
	64	/*
65	* low level task data that entry.S needs immediate access to.
66	* __switch_to() assumes cpu_context follows immediately after cpu_domain.
67	*/
68	struct thread_info {
69	unsigned long flags; /* low level flags */
70	int preempt_count; /* 0 => preemptable */
71	/* <0 => bug */
72	mm_segment_t addr_limit; /* address limit */
73	struct task_struct task; / main task structure */
74	struct exec_domain exec_domain; / execution domain */
75	__u32 cpu; /* cpu */
76	struct cpu_context_save cpu_context; /* cpu context */
77	__u32 syscall; /* syscall number */
78	__u8 used_cp[16]; /* thread used copro */
79	#ifdef CONFIG_UNICORE_FPU_F64
80	struct fp_state fpstate __attribute__((aligned(8)));
81	#endif
f73670e8 G	82	};
	83
	84	#define INIT_THREAD_INFO(tsk) \
	85	{ \
	86	.task = &tsk, \
	87	.exec_domain = &default_exec_domain, \
	88	.flags = 0, \
	89	.preempt_count = INIT_PREEMPT_COUNT, \
	90	.addr_limit = KERNEL_DS, \
f73670e8 G	91	}
	92
	93	#define init_thread_info (init_thread_union.thread_info)
	94	#define init_stack (init_thread_union.stack)
	95
	96	/*
	97	* how to get the thread information struct from C
	98	*/
	99	static inline struct thread_info *current_thread_info(void) __attribute_const__;
	100
	101	static inline struct thread_info *current_thread_info(void)
	102	{
	103	register unsigned long sp asm ("sp");
	104	return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
	105	}
	106
	107	#define thread_saved_pc(tsk) \
	108	((unsigned long)(task_thread_info(tsk)->cpu_context.pc))
	109	#define thread_saved_sp(tsk) \
	110	((unsigned long)(task_thread_info(tsk)->cpu_context.sp))
	111	#define thread_saved_fp(tsk) \
	112	((unsigned long)(task_thread_info(tsk)->cpu_context.fp))
	113
	114	#endif
	115
f73670e8 G	116	/*
	117	* thread information flags:
	118	* TIF_SYSCALL_TRACE - syscall trace active
	119	* TIF_SIGPENDING - signal pending
	120	* TIF_NEED_RESCHED - rescheduling necessary
	121	* TIF_NOTIFY_RESUME - callback before returning to user
	122	*/
	123	#define TIF_SIGPENDING 0
	124	#define TIF_NEED_RESCHED 1
	125	#define TIF_NOTIFY_RESUME 2 /* callback before returning to user */
	126	#define TIF_SYSCALL_TRACE 8
	127	#define TIF_MEMDIE 18
f73670e8 G	128	#define TIF_RESTORE_SIGMASK 20
	129
	130	#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
	131	#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
	132	#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
	133	#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
f73670e8 G	134
	135	/*
	136	* Change these and you break ASM code in entry-common.S
	137	*/
87b0e714 AV	138	#define _TIF_WORK_MASK \
87b0e714 AV	139	(_TIF_SIGPENDING \| _TIF_NEED_RESCHED \| _TIF_NOTIFY_RESUME)
f73670e8 G	140
	141	#endif /* __KERNEL__ */
	142	#endif /* __UNICORE_THREAD_INFO_H__ */