[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / asm-powerpc / thread_info.h

/* thread_info.h: PowerPC low-level thread information
 * adapted from the i386 version by Paul Mackerras
 *
 * Copyright (C) 2002  David Howells (dhowells@redhat.com)
 * - Incorporating suggestions made by Linus Torvalds and Dave Miller
 */

#ifndef _ASM_POWERPC_THREAD_INFO_H
#define _ASM_POWERPC_THREAD_INFO_H

#ifdef __KERNEL__

/* We have 8k stacks on ppc32 and 16k on ppc64 */

#ifdef CONFIG_PPC64
#define THREAD_SHIFT		14
#else
#define THREAD_SHIFT		13
#endif

#define THREAD_SIZE		(1 << THREAD_SHIFT)

#ifndef __ASSEMBLY__
#include <linux/cache.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <linux/stringify.h>

/*
 * low level task data.
 */
struct thread_info {
	struct task_struct *task;		/* main task structure */
	struct exec_domain *exec_domain;	/* execution domain */
	int		cpu;			/* cpu we're on */
	int		preempt_count;		/* 0 => preemptable,
						   <0 => BUG */
	struct restart_block restart_block;
	unsigned long	local_flags;		/* private flags for thread */

	/* low level flags - has atomic operations done on it */
	unsigned long	flags ____cacheline_aligned_in_smp;
};

/*
 * 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,	\
	.cpu =		0,			\
	.preempt_count = 1,			\
	.restart_block = {			\
		.fn = do_no_restart_syscall,	\
	},					\
	.flags =	0,			\
}

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

/* thread information allocation */

#if THREAD_SHIFT >= PAGE_SHIFT

#define THREAD_ORDER	(THREAD_SHIFT - PAGE_SHIFT)

#ifdef CONFIG_DEBUG_STACK_USAGE
#define alloc_thread_info(tsk)	\
	((struct thread_info *)__get_free_pages(GFP_KERNEL | \
		__GFP_ZERO, THREAD_ORDER))
#else
#define alloc_thread_info(tsk)	\
	((struct thread_info *)__get_free_pages(GFP_KERNEL, THREAD_ORDER))
#endif
#define free_thread_info(ti)	free_pages((unsigned long)ti, THREAD_ORDER)

#else /* THREAD_SHIFT < PAGE_SHIFT */

#ifdef CONFIG_DEBUG_STACK_USAGE
#define alloc_thread_info(tsk)	kzalloc(THREAD_SIZE, GFP_KERNEL)
#else
#define alloc_thread_info(tsk)	kmalloc(THREAD_SIZE, GFP_KERNEL)
#endif
#define free_thread_info(ti)	kfree(ti)

#endif /* THREAD_SHIFT < PAGE_SHIFT */

/* how to get the thread information struct from C */
static inline struct thread_info *current_thread_info(void)
{
	register unsigned long sp asm("r1");

	/* gcc4, at least, is smart enough to turn this into a single
	 * rlwinm for ppc32 and clrrdi for ppc64 */
	return (struct thread_info *)(sp & ~(THREAD_SIZE-1));
}

#endif /* __ASSEMBLY__ */

#define PREEMPT_ACTIVE		0x10000000

/*
 * thread information flag bit numbers
 */
#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
#define TIF_SIGPENDING		1	/* signal pending */
#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
#define TIF_POLLING_NRFLAG	3	/* true if poll_idle() is polling
					   TIF_NEED_RESCHED */
#define TIF_32BIT		4	/* 32 bit binary */
#define TIF_PERFMON_WORK	5	/* work for pfm_handle_work() */
#define TIF_PERFMON_CTXSW	6	/* perfmon needs ctxsw calls */
#define TIF_SYSCALL_AUDIT	7	/* syscall auditing active */
#define TIF_SINGLESTEP		8	/* singlestepping active */
#define TIF_MEMDIE		9
#define TIF_SECCOMP		10	/* secure computing */
#define TIF_RESTOREALL		11	/* Restore all regs (implies NOERROR) */
#define TIF_NOERROR		12	/* Force successful syscall return */
#define TIF_RESTORE_SIGMASK	13	/* Restore signal mask in do_signal */
#define TIF_FREEZE		14	/* Freezing for suspend */
#define TIF_RUNLATCH		15	/* Is the runlatch enabled? */
#define TIF_ABI_PENDING		16	/* 32/64 bit switch needed */

/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
#define _TIF_32BIT		(1<<TIF_32BIT)
#define _TIF_PERFMON_WORK	(1<<TIF_PERFMON_WORK)
#define _TIF_PERFMON_CTXSW	(1<<TIF_PERFMON_CTXSW)
#define _TIF_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)
#define _TIF_SINGLESTEP		(1<<TIF_SINGLESTEP)
#define _TIF_SECCOMP		(1<<TIF_SECCOMP)
#define _TIF_RESTOREALL		(1<<TIF_RESTOREALL)
#define _TIF_NOERROR		(1<<TIF_NOERROR)
#define _TIF_RESTORE_SIGMASK	(1<<TIF_RESTORE_SIGMASK)
#define _TIF_FREEZE		(1<<TIF_FREEZE)
#define _TIF_RUNLATCH		(1<<TIF_RUNLATCH)
#define _TIF_ABI_PENDING	(1<<TIF_ABI_PENDING)
#define _TIF_SYSCALL_T_OR_A	(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP)

#define _TIF_USER_WORK_MASK	( _TIF_SIGPENDING | \
				 _TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)
#define _TIF_PERSYSCALL_MASK	(_TIF_RESTOREALL|_TIF_NOERROR)

/* Bits in local_flags */
/* Don't move TLF_NAPPING without adjusting the code in entry_32.S */
#define TLF_NAPPING		0	/* idle thread enabled NAP mode */

#define _TLF_NAPPING		(1 << TLF_NAPPING)

#endif /* __KERNEL__ */

#endif /* _ASM_POWERPC_THREAD_INFO_H */
Commit	Line	Data
6cb7bfeb	1	/* thread_info.h: PowerPC low-level thread information
1da177e4 LT	2	* adapted from the i386 version by Paul Mackerras
	3	*
	4	* Copyright (C) 2002 David Howells (dhowells@redhat.com)
	5	* - Incorporating suggestions made by Linus Torvalds and Dave Miller
	6	*/
	7
6cb7bfeb DG	8	#ifndef _ASM_POWERPC_THREAD_INFO_H
6cb7bfeb DG	9	#define _ASM_POWERPC_THREAD_INFO_H
1da177e4 LT	10
	11	#ifdef __KERNEL__
	12
6cb7bfeb DG	13	/* We have 8k stacks on ppc32 and 16k on ppc64 */
	14
	15	#ifdef CONFIG_PPC64
	16	#define THREAD_SHIFT 14
	17	#else
	18	#define THREAD_SHIFT 13
	19	#endif
	20
	21	#define THREAD_SIZE (1 << THREAD_SHIFT)
	22
1da177e4	23	#ifndef __ASSEMBLY__
1da177e4 LT	24	#include <linux/cache.h>
	25	#include <asm/processor.h>
	26	#include <asm/page.h>
	27	#include <linux/stringify.h>
	28
	29	/*
	30	* low level task data.
	31	*/
	32	struct thread_info {
	33	struct task_struct task; / main task structure */
	34	struct exec_domain exec_domain; / execution domain */
	35	int cpu; /* cpu we're on */
6cb7bfeb DG	36	int preempt_count; /* 0 => preemptable,
6cb7bfeb DG	37	<0 => BUG */
1da177e4	38	struct restart_block restart_block;
f39224a8 PM	39	unsigned long local_flags; /* private flags for thread */
f39224a8 PM	40
1da177e4 LT	41	/* low level flags - has atomic operations done on it */
	42	unsigned long flags ____cacheline_aligned_in_smp;
	43	};
	44
	45	/*
	46	* macros/functions for gaining access to the thread information structure
	47	*
	48	* preempt_count needs to be 1 initially, until the scheduler is functional.
	49	*/
	50	#define INIT_THREAD_INFO(tsk) \
	51	{ \
	52	.task = &tsk, \
	53	.exec_domain = &default_exec_domain, \
	54	.cpu = 0, \
	55	.preempt_count = 1, \
	56	.restart_block = { \
	57	.fn = do_no_restart_syscall, \
	58	}, \
	59	.flags = 0, \
	60	}
	61
	62	#define init_thread_info (init_thread_union.thread_info)
	63	#define init_stack (init_thread_union.stack)
	64
	65	/* thread information allocation */
	66
328985b2 DG	67	#if THREAD_SHIFT >= PAGE_SHIFT
	68
	69	#define THREAD_ORDER (THREAD_SHIFT - PAGE_SHIFT)
	70
3c726f8d	71	#ifdef CONFIG_DEBUG_STACK_USAGE
328985b2	72	#define alloc_thread_info(tsk) \
3c726f8d BH	73	((struct thread_info *)__get_free_pages(GFP_KERNEL \| \
	74	__GFP_ZERO, THREAD_ORDER))
	75	#else
	76	#define alloc_thread_info(tsk) \
	77	((struct thread_info *)__get_free_pages(GFP_KERNEL, THREAD_ORDER))
	78	#endif
328985b2 DG	79	#define free_thread_info(ti) free_pages((unsigned long)ti, THREAD_ORDER)
	80
	81	#else /* THREAD_SHIFT < PAGE_SHIFT */
	82
3c726f8d BH	83	#ifdef CONFIG_DEBUG_STACK_USAGE
	84	#define alloc_thread_info(tsk) kzalloc(THREAD_SIZE, GFP_KERNEL)
	85	#else
	86	#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
	87	#endif
1da177e4	88	#define free_thread_info(ti) kfree(ti)
328985b2 DG	89
	90	#endif /* THREAD_SHIFT < PAGE_SHIFT */
	91
1da177e4 LT	92	/* how to get the thread information struct from C */
	93	static inline struct thread_info *current_thread_info(void)
	94	{
6cb7bfeb DG	95	register unsigned long sp asm("r1");
	96
	97	/* gcc4, at least, is smart enough to turn this into a single
	98	* rlwinm for ppc32 and clrrdi for ppc64 */
	99	return (struct thread_info *)(sp & ~(THREAD_SIZE-1));
1da177e4 LT	100	}
	101
	102	#endif /* __ASSEMBLY__ */
	103
	104	#define PREEMPT_ACTIVE 0x10000000
	105
	106	/*
	107	* thread information flag bit numbers
	108	*/
	109	#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
a583f1b5 SE	110	#define TIF_SIGPENDING 1 /* signal pending */
	111	#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
	112	#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
1da177e4	113	TIF_NEED_RESCHED */
a583f1b5 SE	114	#define TIF_32BIT 4 /* 32 bit binary */
	115	#define TIF_PERFMON_WORK 5 /* work for pfm_handle_work() */
	116	#define TIF_PERFMON_CTXSW 6 /* perfmon needs ctxsw calls */
	117	#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
	118	#define TIF_SINGLESTEP 8 /* singlestepping active */
	119	#define TIF_MEMDIE 9
	120	#define TIF_SECCOMP 10 /* secure computing */
	121	#define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */
	122	#define TIF_NOERROR 12 /* Force successful syscall return */
	123	#define TIF_RESTORE_SIGMASK 13 /* Restore signal mask in do_signal */
	124	#define TIF_FREEZE 14 /* Freezing for suspend */
	125	#define TIF_RUNLATCH 15 /* Is the runlatch enabled? */
	126	#define TIF_ABI_PENDING 16 /* 32/64 bit switch needed */
1da177e4 LT	127
	128	/* as above, but as bit values */
	129	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
1da177e4 LT	130	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
	131	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
	132	#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
	133	#define _TIF_32BIT (1<<TIF_32BIT)
f341973d AB	134	#define _TIF_PERFMON_WORK (1<<TIF_PERFMON_WORK)
f341973d AB	135	#define _TIF_PERFMON_CTXSW (1<<TIF_PERFMON_CTXSW)
1da177e4 LT	136	#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
	137	#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
	138	#define _TIF_SECCOMP (1<<TIF_SECCOMP)
401d1f02	139	#define _TIF_RESTOREALL (1<<TIF_RESTOREALL)
401d1f02	140	#define _TIF_NOERROR (1<<TIF_NOERROR)
f27201da	141	#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
8a102eed	142	#define _TIF_FREEZE (1<<TIF_FREEZE)
f341973d AB	143	#define _TIF_RUNLATCH (1<<TIF_RUNLATCH)
f341973d AB	144	#define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING)
1da177e4 LT	145	#define _TIF_SYSCALL_T_OR_A (_TIF_SYSCALL_TRACE\|_TIF_SYSCALL_AUDIT\|_TIF_SECCOMP)
1da177e4 LT	146
a583f1b5	147	#define _TIF_USER_WORK_MASK ( _TIF_SIGPENDING \| \
1bd79336 PM	148	_TIF_NEED_RESCHED \| _TIF_RESTORE_SIGMASK)
1bd79336 PM	149	#define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL\|_TIF_NOERROR)
1da177e4	150
f39224a8 PM	151	/* Bits in local_flags */
	152	/* Don't move TLF_NAPPING without adjusting the code in entry_32.S */
	153	#define TLF_NAPPING 0 /* idle thread enabled NAP mode */
	154
	155	#define _TLF_NAPPING (1 << TLF_NAPPING)
	156
1da177e4 LT	157	#endif /* __KERNEL__ */
1da177e4 LT	158
6cb7bfeb	159	#endif /* _ASM_POWERPC_THREAD_INFO_H */