[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / mips / include / asm / thread_info.h

/* thread_info.h: MIPS low-level thread information
 *
 * Copyright (C) 2002  David Howells (dhowells@redhat.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/processor.h>

/*
 * low level task data that entry.S needs immediate access to
 * - this struct should fit entirely inside of one cache line
 * - this struct shares the supervisor stack pages
 * - if the contents of this structure are changed, the assembly constants
 *   must also be changed
 */
struct thread_info {
	struct task_struct	*task;		/* main task structure */
	struct exec_domain	*exec_domain;	/* execution domain */
	unsigned long		flags;		/* low level flags */
	unsigned long		tp_value;	/* thread pointer */
	__u32			cpu;		/* current CPU */
	int			preempt_count;	/* 0 => preemptable, <0 => BUG */

	mm_segment_t		addr_limit;	/*
						 * thread address space limit:
						 * 0x7fffffff for user-thead
						 * 0xffffffff for kernel-thread
						 */
	struct restart_block	restart_block;
	struct pt_regs		*regs;
};

/*
 * macros/functions for gaining access to the thread information structure
 */
#define INIT_THREAD_INFO(tsk)			\
{						\
	.task		= &tsk,			\
	.exec_domain	= &default_exec_domain, \
	.flags		= _TIF_FIXADE,		\
	.cpu		= 0,			\
	.preempt_count	= INIT_PREEMPT_COUNT,	\
	.addr_limit	= KERNEL_DS,		\
	.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.  */
static inline struct thread_info *current_thread_info(void)
{
	register struct thread_info *__current_thread_info __asm__("$28");

	return __current_thread_info;
}

#endif /* !__ASSEMBLY__ */

/* thread information allocation */
#if defined(CONFIG_PAGE_SIZE_4KB) && defined(CONFIG_32BIT)
#define THREAD_SIZE_ORDER (1)
#endif
#if defined(CONFIG_PAGE_SIZE_4KB) && defined(CONFIG_64BIT)
#define THREAD_SIZE_ORDER (2)
#endif
#ifdef CONFIG_PAGE_SIZE_8KB
#define THREAD_SIZE_ORDER (1)
#endif
#ifdef CONFIG_PAGE_SIZE_16KB
#define THREAD_SIZE_ORDER (0)
#endif
#ifdef CONFIG_PAGE_SIZE_32KB
#define THREAD_SIZE_ORDER (0)
#endif
#ifdef CONFIG_PAGE_SIZE_64KB
#define THREAD_SIZE_ORDER (0)
#endif

#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
#define THREAD_MASK (THREAD_SIZE - 1UL)

#define STACK_WARN	(THREAD_SIZE / 8)

#define PREEMPT_ACTIVE		0x10000000

/*
 * thread information flags
 * - these are process state flags that various assembly files may need to
 *   access
 * - pending work-to-be-done flags are in LSW
 * - other flags in MSW
 */
#define TIF_SIGPENDING		1	/* signal pending */
#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
#define TIF_SYSCALL_AUDIT	3	/* syscall auditing active */
#define TIF_SECCOMP		4	/* secure computing */
#define TIF_NOTIFY_RESUME	5	/* callback before returning to user */
#define TIF_RESTORE_SIGMASK	9	/* restore signal mask in do_signal() */
#define TIF_USEDFPU		16	/* FPU was used by this task this quantum (SMP) */
#define TIF_MEMDIE		18	/* is terminating due to OOM killer */
#define TIF_FIXADE		20	/* Fix address errors in software */
#define TIF_LOGADE		21	/* Log address errors to syslog */
#define TIF_32BIT_REGS		22	/* also implies 16/32 fprs */
#define TIF_32BIT_ADDR		23	/* 32-bit address space (o32/n32) */
#define TIF_FPUBOUND		24	/* thread bound to FPU-full CPU set */
#define TIF_LOAD_WATCH		25	/* If set, load watch registers */
#define TIF_SYSCALL_TRACE	31	/* syscall trace active */

#define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
#define _TIF_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP		(1<<TIF_SECCOMP)
#define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
#define _TIF_USEDFPU		(1<<TIF_USEDFPU)
#define _TIF_FIXADE		(1<<TIF_FIXADE)
#define _TIF_LOGADE		(1<<TIF_LOGADE)
#define _TIF_32BIT_REGS		(1<<TIF_32BIT_REGS)
#define _TIF_32BIT_ADDR		(1<<TIF_32BIT_ADDR)
#define _TIF_FPUBOUND		(1<<TIF_FPUBOUND)
#define _TIF_LOAD_WATCH		(1<<TIF_LOAD_WATCH)

#define _TIF_WORK_SYSCALL_ENTRY	(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP)

/* work to do in syscall_trace_leave() */
#define _TIF_WORK_SYSCALL_EXIT	(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT)

/* work to do on interrupt/exception return */
#define _TIF_WORK_MASK		\
	(_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_NOTIFY_RESUME)
/* work to do on any return to u-space */
#define _TIF_ALLWORK_MASK	(_TIF_WORK_MASK | _TIF_WORK_SYSCALL_EXIT)

#endif /* __KERNEL__ */

#endif /* _ASM_THREAD_INFO_H */
Commit	Line	Data
1da177e4 LT	1	/* thread_info.h: MIPS low-level thread information
	2	*
	3	* Copyright (C) 2002 David Howells (dhowells@redhat.com)
	4	* - Incorporating suggestions made by Linus Torvalds and Dave Miller
	5	*/
	6
	7	#ifndef _ASM_THREAD_INFO_H
	8	#define _ASM_THREAD_INFO_H
	9
	10	#ifdef __KERNEL__
	11
1da177e4 LT	12
	13	#ifndef __ASSEMBLY__
	14
	15	#include <asm/processor.h>
	16
	17	/*
	18	* low level task data that entry.S needs immediate access to
	19	* - this struct should fit entirely inside of one cache line
	20	* - this struct shares the supervisor stack pages
	21	* - if the contents of this structure are changed, the assembly constants
	22	* must also be changed
	23	*/
	24	struct thread_info {
	25	struct task_struct task; / main task structure */
	26	struct exec_domain exec_domain; / execution domain */
	27	unsigned long flags; /* low level flags */
3c37026d	28	unsigned long tp_value; /* thread pointer */
1da177e4	29	__u32 cpu; /* current CPU */
dcd497f9	30	int preempt_count; /* 0 => preemptable, <0 => BUG */
1da177e4	31
02637b85 RB	32	mm_segment_t addr_limit; /*
	33	* thread address space limit:
	34	* 0x7fffffff for user-thead
	35	* 0xffffffff for kernel-thread
	36	*/
1da177e4	37	struct restart_block restart_block;
937a8015	38	struct pt_regs *regs;
1da177e4 LT	39	};
	40
	41	/*
	42	* macros/functions for gaining access to the thread information structure
1da177e4 LT	43	*/
	44	#define INIT_THREAD_INFO(tsk) \
	45	{ \
	46	.task = &tsk, \
70342287	47	.exec_domain = &default_exec_domain, \
293c5bd1	48	.flags = _TIF_FIXADE, \
1da177e4	49	.cpu = 0, \
c99e6efe	50	.preempt_count = INIT_PREEMPT_COUNT, \
1da177e4 LT	51	.addr_limit = KERNEL_DS, \
	52	.restart_block = { \
	53	.fn = do_no_restart_syscall, \
	54	}, \
	55	}
	56
	57	#define init_thread_info (init_thread_union.thread_info)
	58	#define init_stack (init_thread_union.stack)
	59
	60	/* How to get the thread information struct from C. */
ad04c2e9 RB	61	static inline struct thread_info *current_thread_info(void)
	62	{
	63	register struct thread_info *__current_thread_info __asm__("$28");
	64
	65	return __current_thread_info;
	66	}
1da177e4	67
7b1c0d26 DD	68	#endif /* !__ASSEMBLY__ */
7b1c0d26 DD	69
1da177e4	70	/* thread information allocation */
875d43e7	71	#if defined(CONFIG_PAGE_SIZE_4KB) && defined(CONFIG_32BIT)
1da177e4 LT	72	#define THREAD_SIZE_ORDER (1)
1da177e4 LT	73	#endif
875d43e7	74	#if defined(CONFIG_PAGE_SIZE_4KB) && defined(CONFIG_64BIT)
1da177e4 LT	75	#define THREAD_SIZE_ORDER (2)
	76	#endif
	77	#ifdef CONFIG_PAGE_SIZE_8KB
	78	#define THREAD_SIZE_ORDER (1)
	79	#endif
	80	#ifdef CONFIG_PAGE_SIZE_16KB
	81	#define THREAD_SIZE_ORDER (0)
	82	#endif
c52399be RB	83	#ifdef CONFIG_PAGE_SIZE_32KB
	84	#define THREAD_SIZE_ORDER (0)
	85	#endif
1da177e4 LT	86	#ifdef CONFIG_PAGE_SIZE_64KB
	87	#define THREAD_SIZE_ORDER (0)
	88	#endif
	89
	90	#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
	91	#define THREAD_MASK (THREAD_SIZE - 1UL)
	92
334c86c4 F	93	#define STACK_WARN (THREAD_SIZE / 8)
334c86c4 F	94
1da177e4 LT	95	#define PREEMPT_ACTIVE 0x10000000
	96
	97	/*
	98	* thread information flags
	99	* - these are process state flags that various assembly files may need to
	100	* access
	101	* - pending work-to-be-done flags are in LSW
	102	* - other flags in MSW
	103	*/
a583f1b5 SE	104	#define TIF_SIGPENDING 1 /* signal pending */
	105	#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
	106	#define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */
	107	#define TIF_SECCOMP 4 /* secure computing */
d0420c83	108	#define TIF_NOTIFY_RESUME 5 /* callback before returning to user */
7b3e2fc8	109	#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
1da177e4	110	#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
0ddc9324	111	#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
293c5bd1 RB	112	#define TIF_FIXADE 20 /* Fix address errors in software */
	113	#define TIF_LOGADE 21 /* Log address errors to syslog */
	114	#define TIF_32BIT_REGS 22 /* also implies 16/32 fprs */
	115	#define TIF_32BIT_ADDR 23 /* 32-bit address space (o32/n32) */
	116	#define TIF_FPUBOUND 24 /* thread bound to FPU-full CPU set */
6aa3524c	117	#define TIF_LOAD_WATCH 25 /* If set, load watch registers */
1da177e4 LT	118	#define TIF_SYSCALL_TRACE 31 /* syscall trace active */
	119
	120	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
1da177e4 LT	121	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
	122	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
	123	#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
127c6f66	124	#define _TIF_SECCOMP (1<<TIF_SECCOMP)
d0420c83	125	#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
1da177e4	126	#define _TIF_USEDFPU (1<<TIF_USEDFPU)
293c5bd1 RB	127	#define _TIF_FIXADE (1<<TIF_FIXADE)
	128	#define _TIF_LOGADE (1<<TIF_LOGADE)
	129	#define _TIF_32BIT_REGS (1<<TIF_32BIT_REGS)
	130	#define _TIF_32BIT_ADDR (1<<TIF_32BIT_ADDR)
	131	#define _TIF_FPUBOUND (1<<TIF_FPUBOUND)
6aa3524c	132	#define _TIF_LOAD_WATCH (1<<TIF_LOAD_WATCH)
1da177e4	133
4fc5ea5e	134	#define _TIF_WORK_SYSCALL_ENTRY (_TIF_SYSCALL_TRACE \| _TIF_SYSCALL_AUDIT \| _TIF_SECCOMP)
1b91a02f	135
c19c20ac RB	136	/* work to do in syscall_trace_leave() */
	137	#define _TIF_WORK_SYSCALL_EXIT (_TIF_SYSCALL_TRACE \| _TIF_SYSCALL_AUDIT)
	138
127c6f66	139	/* work to do on interrupt/exception return */
f925725d	140	#define _TIF_WORK_MASK \
ac19fe5b	141	(_TIF_SIGPENDING \| _TIF_NEED_RESCHED \| _TIF_NOTIFY_RESUME)
127c6f66	142	/* work to do on any return to u-space */
f925725d	143	#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK \| _TIF_WORK_SYSCALL_EXIT)
1da177e4 LT	144
	145	#endif /* __KERNEL__ */
	146
	147	#endif /* _ASM_THREAD_INFO_H */