[mirror_ubuntu-jammy-kernel.git] / arch / powerpc / include / asm / 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 */

#if defined(CONFIG_PPC64)
#define THREAD_SHIFT		14
#elif defined(CONFIG_PPC_256K_PAGES)
#define THREAD_SHIFT		15
#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
 */
#define INIT_THREAD_INFO(tsk)			\
{						\
	.task =		&tsk,			\
	.exec_domain =	&default_exec_domain,	\
	.cpu =		0,			\
	.preempt_count = INIT_PREEMPT_COUNT,	\
	.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_SIZE_ORDER	(THREAD_SHIFT - PAGE_SHIFT)

#else /* THREAD_SHIFT < PAGE_SHIFT */

#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR

extern struct thread_info *alloc_thread_info_node(struct task_struct *tsk, int node);
extern void free_thread_info(struct thread_info *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	/* is terminating due to OOM killer */
#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_NOTIFY_RESUME	13	/* callback before returning to user */
#define TIF_SYSCALL_TRACEPOINT	15	/* syscall tracepoint instrumentation */
#define TIF_RUNLATCH		16	/* Is the runlatch enabled? */

/* 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_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
#define _TIF_SYSCALL_TRACEPOINT	(1<<TIF_SYSCALL_TRACEPOINT)
#define _TIF_RUNLATCH		(1<<TIF_RUNLATCH)
#define _TIF_SYSCALL_T_OR_A	(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
				 _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT)

#define _TIF_USER_WORK_MASK	(_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
				 _TIF_NOTIFY_RESUME)
#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_SLEEPING		1	/* suspend code enabled SLEEP mode */
#define TLF_RESTORE_SIGMASK	2	/* Restore signal mask in do_signal */
#define TLF_LAZY_MMU		3	/* tlb_batch is active */

#define _TLF_NAPPING		(1 << TLF_NAPPING)
#define _TLF_SLEEPING		(1 << TLF_SLEEPING)
#define _TLF_RESTORE_SIGMASK	(1 << TLF_RESTORE_SIGMASK)
#define _TLF_LAZY_MMU		(1 << TLF_LAZY_MMU)

#ifndef __ASSEMBLY__
#define HAVE_SET_RESTORE_SIGMASK	1
static inline void set_restore_sigmask(void)
{
	struct thread_info *ti = current_thread_info();
	ti->local_flags |= _TLF_RESTORE_SIGMASK;
	set_bit(TIF_SIGPENDING, &ti->flags);
}

#ifdef CONFIG_PPC64
#define is_32bit_task()	(test_thread_flag(TIF_32BIT))
#else
#define is_32bit_task()	(1)
#endif

#endif	/* !__ASSEMBLY__ */

#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 */
6cb7bfeb DG	14
e1240122	15	#if defined(CONFIG_PPC64)
6cb7bfeb	16	#define THREAD_SHIFT 14
e1240122 YT	17	#elif defined(CONFIG_PPC_256K_PAGES)
e1240122 YT	18	#define THREAD_SHIFT 15
6cb7bfeb DG	19	#else
	20	#define THREAD_SHIFT 13
	21	#endif
	22
	23	#define THREAD_SIZE (1 << THREAD_SHIFT)
	24
1da177e4	25	#ifndef __ASSEMBLY__
1da177e4 LT	26	#include <linux/cache.h>
	27	#include <asm/processor.h>
	28	#include <asm/page.h>
	29	#include <linux/stringify.h>
	30
	31	/*
	32	* low level task data.
	33	*/
	34	struct thread_info {
	35	struct task_struct task; / main task structure */
	36	struct exec_domain exec_domain; / execution domain */
	37	int cpu; /* cpu we're on */
6cb7bfeb DG	38	int preempt_count; /* 0 => preemptable,
6cb7bfeb DG	39	<0 => BUG */
1da177e4	40	struct restart_block restart_block;
f39224a8 PM	41	unsigned long local_flags; /* private flags for thread */
f39224a8 PM	42
1da177e4 LT	43	/* low level flags - has atomic operations done on it */
	44	unsigned long flags ____cacheline_aligned_in_smp;
	45	};
	46
	47	/*
	48	* macros/functions for gaining access to the thread information structure
1da177e4 LT	49	*/
	50	#define INIT_THREAD_INFO(tsk) \
	51	{ \
	52	.task = &tsk, \
	53	.exec_domain = &default_exec_domain, \
	54	.cpu = 0, \
c99e6efe	55	.preempt_count = INIT_PREEMPT_COUNT, \
1da177e4 LT	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
328985b2 DG	68
b69c49b7	69	#define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT)
328985b2 DG	70
	71	#else /* THREAD_SHIFT < PAGE_SHIFT */
	72
b69c49b7 FT	73	#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
b69c49b7 FT	74
b6a84016	75	extern struct thread_info alloc_thread_info_node(struct task_struct tsk, int node);
f6a61680	76	extern void free_thread_info(struct thread_info *ti);
328985b2 DG	77
	78	#endif /* THREAD_SHIFT < PAGE_SHIFT */
	79
1da177e4 LT	80	/* how to get the thread information struct from C */
	81	static inline struct thread_info *current_thread_info(void)
	82	{
6cb7bfeb DG	83	register unsigned long sp asm("r1");
	84
	85	/* gcc4, at least, is smart enough to turn this into a single
	86	* rlwinm for ppc32 and clrrdi for ppc64 */
	87	return (struct thread_info *)(sp & ~(THREAD_SIZE-1));
1da177e4 LT	88	}
	89
	90	#endif /* __ASSEMBLY__ */
	91
	92	#define PREEMPT_ACTIVE 0x10000000
	93
	94	/*
	95	* thread information flag bit numbers
	96	*/
	97	#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
a583f1b5 SE	98	#define TIF_SIGPENDING 1 /* signal pending */
	99	#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
	100	#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
1da177e4	101	TIF_NEED_RESCHED */
a583f1b5 SE	102	#define TIF_32BIT 4 /* 32 bit binary */
	103	#define TIF_PERFMON_WORK 5 /* work for pfm_handle_work() */
	104	#define TIF_PERFMON_CTXSW 6 /* perfmon needs ctxsw calls */
	105	#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
	106	#define TIF_SINGLESTEP 8 /* singlestepping active */
0ddc9324	107	#define TIF_MEMDIE 9 /* is terminating due to OOM killer */
a583f1b5 SE	108	#define TIF_SECCOMP 10 /* secure computing */
	109	#define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */
	110	#define TIF_NOERROR 12 /* Force successful syscall return */
7d6d637d	111	#define TIF_NOTIFY_RESUME 13 /* callback before returning to user */
02424d89 IM	112	#define TIF_SYSCALL_TRACEPOINT 15 /* syscall tracepoint instrumentation */
02424d89 IM	113	#define TIF_RUNLATCH 16 /* Is the runlatch enabled? */
1da177e4 LT	114
	115	/* as above, but as bit values */
	116	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
1da177e4 LT	117	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
	118	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
	119	#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
	120	#define _TIF_32BIT (1<<TIF_32BIT)
f341973d AB	121	#define _TIF_PERFMON_WORK (1<<TIF_PERFMON_WORK)
f341973d AB	122	#define _TIF_PERFMON_CTXSW (1<<TIF_PERFMON_CTXSW)
1da177e4 LT	123	#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
	124	#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
	125	#define _TIF_SECCOMP (1<<TIF_SECCOMP)
401d1f02	126	#define _TIF_RESTOREALL (1<<TIF_RESTOREALL)
401d1f02	127	#define _TIF_NOERROR (1<<TIF_NOERROR)
7d6d637d	128	#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
02424d89	129	#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
f341973d	130	#define _TIF_RUNLATCH (1<<TIF_RUNLATCH)
02424d89 IM	131	#define _TIF_SYSCALL_T_OR_A (_TIF_SYSCALL_TRACE \| _TIF_SYSCALL_AUDIT \| \
02424d89 IM	132	_TIF_SECCOMP \| _TIF_SYSCALL_TRACEPOINT)
1da177e4	133
7d6d637d RM	134	#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING \| _TIF_NEED_RESCHED \| \
7d6d637d RM	135	_TIF_NOTIFY_RESUME)
1bd79336	136	#define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL\|_TIF_NOERROR)
1da177e4	137
f39224a8 PM	138	/* Bits in local_flags */
	139	/* Don't move TLF_NAPPING without adjusting the code in entry_32.S */
	140	#define TLF_NAPPING 0 /* idle thread enabled NAP mode */
a560643e PM	141	#define TLF_SLEEPING 1 /* suspend code enabled SLEEP mode */
a560643e PM	142	#define TLF_RESTORE_SIGMASK 2 /* Restore signal mask in do_signal */
d6bf29b4	143	#define TLF_LAZY_MMU 3 /* tlb_batch is active */
f39224a8 PM	144
f39224a8 PM	145	#define _TLF_NAPPING (1 << TLF_NAPPING)
a560643e	146	#define _TLF_SLEEPING (1 << TLF_SLEEPING)
7a10174e	147	#define _TLF_RESTORE_SIGMASK (1 << TLF_RESTORE_SIGMASK)
d6bf29b4	148	#define _TLF_LAZY_MMU (1 << TLF_LAZY_MMU)
7a10174e RM	149
	150	#ifndef __ASSEMBLY__
	151	#define HAVE_SET_RESTORE_SIGMASK 1
	152	static inline void set_restore_sigmask(void)
	153	{
	154	struct thread_info *ti = current_thread_info();
	155	ti->local_flags \|= _TLF_RESTORE_SIGMASK;
	156	set_bit(TIF_SIGPENDING, &ti->flags);
	157	}
a465f9b6 AB	158
	159	#ifdef CONFIG_PPC64
	160	#define is_32bit_task() (test_thread_flag(TIF_32BIT))
	161	#else
	162	#define is_32bit_task() (1)
	163	#endif
	164
7a10174e	165	#endif /* !__ASSEMBLY__ */
f39224a8	166
1da177e4 LT	167	#endif /* __KERNEL__ */
1da177e4 LT	168
6cb7bfeb	169	#endif /* _ASM_POWERPC_THREAD_INFO_H */