[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / asm-mips / 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:
						   0-0xBFFFFFFF for user-thead
						   0-0xFFFFFFFF for kernel-thread
						*/
	struct restart_block	restart_block;
	struct pt_regs		*regs;
};

/*
 * macros/functions for gaining access to the thread information structure
 *
 * preempt_count needs to be 1 initially, until the scheduler is functional.
 */
#define INIT_THREAD_INFO(tsk)			\
{						\
	.task		= &tsk,			\
	.exec_domain	= &default_exec_domain,	\
	.flags		= 0,			\
	.cpu		= 0,			\
	.preempt_count	= 1,			\
	.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.  */
register struct thread_info *__current_thread_info __asm__("$28");
#define current_thread_info()  __current_thread_info

/* 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_64KB
#define THREAD_SIZE_ORDER (0)
#endif

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

#ifdef CONFIG_DEBUG_STACK_USAGE
#define alloc_thread_info(tsk)					\
({								\
	struct thread_info *ret;				\
								\
	ret = kmalloc(THREAD_SIZE, GFP_KERNEL);			\
	if (ret)						\
		memset(ret, 0, THREAD_SIZE);			\
	ret;							\
})
#else
#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
#endif

#define free_thread_info(info) kfree(info)

#endif /* !__ASSEMBLY__ */

#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_NOTIFY_RESUME	1	/* resumption notification requested */
#define TIF_SIGPENDING		2	/* signal pending */
#define TIF_NEED_RESCHED	3	/* rescheduling necessary */
#define TIF_SYSCALL_AUDIT	4	/* syscall auditing active */
#define TIF_SECCOMP		5	/* secure computing */
#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_POLLING_NRFLAG	17	/* true if poll_idle() is polling TIF_NEED_RESCHED */
#define TIF_MEMDIE		18
#define TIF_FREEZE		19
#define TIF_SYSCALL_TRACE	31	/* syscall trace active */

#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_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP		(1<<TIF_SECCOMP)
#define _TIF_RESTORE_SIGMASK	(1<<TIF_RESTORE_SIGMASK)
#define _TIF_USEDFPU		(1<<TIF_USEDFPU)
#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
#define _TIF_FREEZE		(1<<TIF_FREEZE)

/* work to do on interrupt/exception return */
#define _TIF_WORK_MASK		(0x0000ffef & ~_TIF_SECCOMP)
/* work to do on any return to u-space */
#define _TIF_ALLWORK_MASK	(0x8000ffff & ~_TIF_SECCOMP)

#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 LT	31
1da177e4 LT	32	mm_segment_t addr_limit; /* thread address space:
a3dddd56	33	0-0xBFFFFFFF for user-thead
1da177e4 LT	34	0-0xFFFFFFFF for kernel-thread
	35	*/
	36	struct restart_block restart_block;
937a8015	37	struct pt_regs *regs;
1da177e4 LT	38	};
	39
	40	/*
	41	* macros/functions for gaining access to the thread information structure
	42	*
	43	* preempt_count needs to be 1 initially, until the scheduler is functional.
	44	*/
	45	#define INIT_THREAD_INFO(tsk) \
	46	{ \
	47	.task = &tsk, \
	48	.exec_domain = &default_exec_domain, \
	49	.flags = 0, \
	50	.cpu = 0, \
	51	.preempt_count = 1, \
	52	.addr_limit = KERNEL_DS, \
	53	.restart_block = { \
	54	.fn = do_no_restart_syscall, \
	55	}, \
	56	}
	57
	58	#define init_thread_info (init_thread_union.thread_info)
	59	#define init_stack (init_thread_union.stack)
	60
	61	/* How to get the thread information struct from C. */
	62	register struct thread_info *__current_thread_info __asm__("$28");
	63	#define current_thread_info() __current_thread_info
	64
	65	/* thread information allocation */
875d43e7	66	#if defined(CONFIG_PAGE_SIZE_4KB) && defined(CONFIG_32BIT)
1da177e4 LT	67	#define THREAD_SIZE_ORDER (1)
1da177e4 LT	68	#endif
875d43e7	69	#if defined(CONFIG_PAGE_SIZE_4KB) && defined(CONFIG_64BIT)
1da177e4 LT	70	#define THREAD_SIZE_ORDER (2)
	71	#endif
	72	#ifdef CONFIG_PAGE_SIZE_8KB
	73	#define THREAD_SIZE_ORDER (1)
	74	#endif
	75	#ifdef CONFIG_PAGE_SIZE_16KB
	76	#define THREAD_SIZE_ORDER (0)
	77	#endif
	78	#ifdef CONFIG_PAGE_SIZE_64KB
	79	#define THREAD_SIZE_ORDER (0)
	80	#endif
	81
	82	#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
	83	#define THREAD_MASK (THREAD_SIZE - 1UL)
	84
	85	#ifdef CONFIG_DEBUG_STACK_USAGE
	86	#define alloc_thread_info(tsk) \
	87	({ \
	88	struct thread_info *ret; \
	89	\
	90	ret = kmalloc(THREAD_SIZE, GFP_KERNEL); \
	91	if (ret) \
	92	memset(ret, 0, THREAD_SIZE); \
	93	ret; \
	94	})
	95	#else
	96	#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
	97	#endif
	98
	99	#define free_thread_info(info) kfree(info)
1da177e4 LT	100
	101	#endif /* !__ASSEMBLY__ */
	102
	103	#define PREEMPT_ACTIVE 0x10000000
	104
	105	/*
	106	* thread information flags
	107	* - these are process state flags that various assembly files may need to
	108	* access
	109	* - pending work-to-be-done flags are in LSW
	110	* - other flags in MSW
	111	*/
	112	#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
	113	#define TIF_SIGPENDING 2 /* signal pending */
	114	#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
	115	#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
127c6f66	116	#define TIF_SECCOMP 5 /* secure computing */
7b3e2fc8	117	#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
1da177e4 LT	118	#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
	119	#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */
	120	#define TIF_MEMDIE 18
89c07fd1	121	#define TIF_FREEZE 19
1da177e4 LT	122	#define TIF_SYSCALL_TRACE 31 /* syscall trace active */
	123
	124	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
	125	#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
	126	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
	127	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
	128	#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
127c6f66	129	#define _TIF_SECCOMP (1<<TIF_SECCOMP)
7b3e2fc8	130	#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
1da177e4 LT	131	#define _TIF_USEDFPU (1<<TIF_USEDFPU)
1da177e4 LT	132	#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
89c07fd1	133	#define _TIF_FREEZE (1<<TIF_FREEZE)
1da177e4	134
127c6f66 RB	135	/* work to do on interrupt/exception return */
	136	#define _TIF_WORK_MASK (0x0000ffef & ~_TIF_SECCOMP)
	137	/* work to do on any return to u-space */
	138	#define _TIF_ALLWORK_MASK (0x8000ffff & ~_TIF_SECCOMP)
1da177e4 LT	139
	140	#endif /* __KERNEL__ */
	141
	142	#endif /* _ASM_THREAD_INFO_H */