[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__

#include <linux/config.h>

#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 */
	__u32			cpu;		/* current CPU */
	__s32			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;
};

/*
 * 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_MIPS32)
#define THREAD_SIZE_ORDER (1)
#endif
#if defined(CONFIG_PAGE_SIZE_4KB) && defined(CONFIG_MIPS64)
#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)
#define get_thread_info(ti) get_task_struct((ti)->task)
#define put_thread_info(ti) put_task_struct((ti)->task)

#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_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_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_USEDFPU		(1<<TIF_USEDFPU)
#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)

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

#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
	12	#include <linux/config.h>
	13
	14	#ifndef __ASSEMBLY__
	15
	16	#include <asm/processor.h>
	17
	18	/*
	19	* low level task data that entry.S needs immediate access to
	20	* - this struct should fit entirely inside of one cache line
	21	* - this struct shares the supervisor stack pages
	22	* - if the contents of this structure are changed, the assembly constants
	23	* must also be changed
	24	*/
	25	struct thread_info {
	26	struct task_struct task; / main task structure */
	27	struct exec_domain exec_domain; / execution domain */
	28	unsigned long flags; /* low level flags */
	29	__u32 cpu; /* current CPU */
	30	__s32 preempt_count; /* 0 => preemptable, <0 => BUG */
	31
	32	mm_segment_t addr_limit; /* thread address space:
	33	0-0xBFFFFFFF for user-thead
	34	0-0xFFFFFFFF for kernel-thread
	35	*/
	36	struct restart_block restart_block;
	37	};
	38
	39	/*
	40	* macros/functions for gaining access to the thread information structure
	41	*
	42	* preempt_count needs to be 1 initially, until the scheduler is functional.
	43	*/
	44	#define INIT_THREAD_INFO(tsk) \
	45	{ \
	46	.task = &tsk, \
	47	.exec_domain = &default_exec_domain, \
	48	.flags = 0, \
	49	.cpu = 0, \
	50	.preempt_count = 1, \
	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. */
	61	register struct thread_info *__current_thread_info __asm__("$28");
	62	#define current_thread_info() __current_thread_info
	63
	64	/* thread information allocation */
65	#if defined(CONFIG_PAGE_SIZE_4KB) && defined(CONFIG_MIPS32)
66	#define THREAD_SIZE_ORDER (1)
67	#endif
68	#if defined(CONFIG_PAGE_SIZE_4KB) && defined(CONFIG_MIPS64)
69	#define THREAD_SIZE_ORDER (2)
70	#endif
71	#ifdef CONFIG_PAGE_SIZE_8KB
72	#define THREAD_SIZE_ORDER (1)
73	#endif
74	#ifdef CONFIG_PAGE_SIZE_16KB
75	#define THREAD_SIZE_ORDER (0)
76	#endif
77	#ifdef CONFIG_PAGE_SIZE_64KB
78	#define THREAD_SIZE_ORDER (0)
79	#endif
80
81	#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
82	#define THREAD_MASK (THREAD_SIZE - 1UL)
83
84	#ifdef CONFIG_DEBUG_STACK_USAGE
85	#define alloc_thread_info(tsk) \
86	({ \
87	struct thread_info *ret; \
88	\
89	ret = kmalloc(THREAD_SIZE, GFP_KERNEL); \
90	if (ret) \
91	memset(ret, 0, THREAD_SIZE); \
92	ret; \
93	})
94	#else
95	#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
96	#endif
97
98	#define free_thread_info(info) kfree(info)
99	#define get_thread_info(ti) get_task_struct((ti)->task)
100	#define put_thread_info(ti) put_task_struct((ti)->task)
101
102	#endif /* !__ASSEMBLY__ */
103
104	#define PREEMPT_ACTIVE 0x10000000
105
106	/*
107	* thread information flags
108	* - these are process state flags that various assembly files may need to
109	* access
110	* - pending work-to-be-done flags are in LSW
111	* - other flags in MSW
112	*/
113	#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
114	#define TIF_SIGPENDING 2 /* signal pending */
115	#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
116	#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
117	#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
118	#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */
119	#define TIF_MEMDIE 18
120	#define TIF_SYSCALL_TRACE 31 /* syscall trace active */
121
122	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
123	#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
124	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
125	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
126	#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
127	#define _TIF_USEDFPU (1<<TIF_USEDFPU)
128	#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
129
130	#define _TIF_WORK_MASK 0x0000ffef /* work to do on
131	interrupt/exception return */
132	#define _TIF_ALLWORK_MASK 0x8000ffff /* work to do on any return to
133	u-space */
134
135	#endif /* __KERNEL__ */
136
137	#endif /* _ASM_THREAD_INFO_H */