[mirror_ubuntu-jammy-kernel.git] / arch / openrisc / include / asm / thread_info.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * OpenRISC Linux
 *
 * Linux architectural port borrowing liberally from similar works of
 * others.  All original copyrights apply as per the original source
 * declaration.
 *
 * OpenRISC implementation:
 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
 * et al.
 */

#ifndef _ASM_THREAD_INFO_H
#define _ASM_THREAD_INFO_H

#ifdef __KERNEL__

#ifndef __ASSEMBLY__
#include <asm/types.h>
#include <asm/processor.h>
#endif


/* THREAD_SIZE is the size of the task_struct/kernel_stack combo.
 * normally, the stack is found by doing something like p + THREAD_SIZE
 * in or32, a page is 8192 bytes, which seems like a sane size
 */

#define THREAD_SIZE_ORDER 0
#define THREAD_SIZE       (PAGE_SIZE << THREAD_SIZE_ORDER)

/*
 * 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
 */
#ifndef __ASSEMBLY__

typedef unsigned long mm_segment_t;

struct thread_info {
	struct task_struct	*task;		/* main task structure */
	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:
					       0-0x7FFFFFFF for user-thead
					       0-0xFFFFFFFF for kernel-thread
					     */
	__u8			supervisor_stack[0];

	/* saved context data */
	unsigned long           ksp;
};
#endif

/*
 * macros/functions for gaining access to the thread information structure
 *
 * preempt_count needs to be 1 initially, until the scheduler is functional.
 */
#ifndef __ASSEMBLY__
#define INIT_THREAD_INFO(tsk)				\
{							\
	.task		= &tsk,				\
	.flags		= 0,				\
	.cpu		= 0,				\
	.preempt_count	= INIT_PREEMPT_COUNT,		\
	.addr_limit	= KERNEL_DS,			\
	.ksp            = 0,                            \
}

/* how to get the thread information struct from C */
register struct thread_info *current_thread_info_reg asm("r10");
#define current_thread_info()   (current_thread_info_reg)

#define get_thread_info(ti) get_task_struct((ti)->task)
#define put_thread_info(ti) put_task_struct((ti)->task)

#endif /* !__ASSEMBLY__ */

/*
 * 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_SYSCALL_TRACE	0	/* syscall trace active */
#define TIF_NOTIFY_RESUME	1	/* resumption notification requested */
#define TIF_SIGPENDING		2	/* signal pending */
#define TIF_NEED_RESCHED	3	/* rescheduling necessary */
#define TIF_SINGLESTEP		4	/* restore singlestep on return to user
					 * mode
					 */
#define TIF_SYSCALL_TRACEPOINT  8       /* for ftrace syscall instrumentation */
#define TIF_RESTORE_SIGMASK     9
#define TIF_POLLING_NRFLAG	16	/* true if poll_idle() is polling						 * TIF_NEED_RESCHED
					 */
#define TIF_MEMDIE              17

#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_SINGLESTEP		(1<<TIF_SINGLESTEP)
#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)


/* Work to do when returning from interrupt/exception */
/* For OpenRISC, this is anything in the LSW other than syscall trace */
#define _TIF_WORK_MASK (0xff & ~(_TIF_SYSCALL_TRACE|_TIF_SINGLESTEP))

#endif /* __KERNEL__ */

#endif /* _ASM_THREAD_INFO_H */
Commit	Line	Data
2874c5fd	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
88ef7f3f JB	2	/*
	3	* OpenRISC Linux
	4	*
	5	* Linux architectural port borrowing liberally from similar works of
	6	* others. All original copyrights apply as per the original source
	7	* declaration.
	8	*
	9	* OpenRISC implementation:
	10	* Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
	11	* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
	12	* et al.
88ef7f3f JB	13	*/
	14
	15	#ifndef _ASM_THREAD_INFO_H
	16	#define _ASM_THREAD_INFO_H
	17
	18	#ifdef __KERNEL__
	19
	20	#ifndef __ASSEMBLY__
	21	#include <asm/types.h>
	22	#include <asm/processor.h>
	23	#endif
	24
	25
	26	/* THREAD_SIZE is the size of the task_struct/kernel_stack combo.
	27	* normally, the stack is found by doing something like p + THREAD_SIZE
	28	* in or32, a page is 8192 bytes, which seems like a sane size
	29	*/
	30
	31	#define THREAD_SIZE_ORDER 0
	32	#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
	33
	34	/*
	35	* low level task data that entry.S needs immediate access to
	36	* - this struct should fit entirely inside of one cache line
	37	* - this struct shares the supervisor stack pages
	38	* - if the contents of this structure are changed, the assembly constants
	39	* must also be changed
	40	*/
	41	#ifndef __ASSEMBLY__
	42
	43	typedef unsigned long mm_segment_t;
	44
	45	struct thread_info {
	46	struct task_struct task; / main task structure */
88ef7f3f JB	47	unsigned long flags; /* low level flags */
	48	__u32 cpu; /* current CPU */
	49	__s32 preempt_count; /* 0 => preemptable, <0 => BUG */
	50
	51	mm_segment_t addr_limit; /* thread address space:
	52	0-0x7FFFFFFF for user-thead
	53	0-0xFFFFFFFF for kernel-thread
	54	*/
88ef7f3f JB	55	__u8 supervisor_stack[0];
	56
	57	/* saved context data */
	58	unsigned long ksp;
	59	};
	60	#endif
	61
	62	/*
	63	* macros/functions for gaining access to the thread information structure
	64	*
	65	* preempt_count needs to be 1 initially, until the scheduler is functional.
	66	*/
	67	#ifndef __ASSEMBLY__
	68	#define INIT_THREAD_INFO(tsk) \
	69	{ \
	70	.task = &tsk, \
88ef7f3f JB	71	.flags = 0, \
88ef7f3f JB	72	.cpu = 0, \
b441aab7	73	.preempt_count = INIT_PREEMPT_COUNT, \
88ef7f3f	74	.addr_limit = KERNEL_DS, \
88ef7f3f JB	75	.ksp = 0, \
	76	}
	77
88ef7f3f JB	78	/* how to get the thread information struct from C */
	79	register struct thread_info *current_thread_info_reg asm("r10");
	80	#define current_thread_info() (current_thread_info_reg)
	81
	82	#define get_thread_info(ti) get_task_struct((ti)->task)
	83	#define put_thread_info(ti) put_task_struct((ti)->task)
	84
	85	#endif /* !__ASSEMBLY__ */
	86
	87	/*
	88	* thread information flags
	89	* these are process state flags that various assembly files may need to
	90	* access
	91	* - pending work-to-be-done flags are in LSW
	92	* - other flags in MSW
	93	*/
	94	#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
	95	#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
	96	#define TIF_SIGPENDING 2 /* signal pending */
	97	#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
	98	#define TIF_SINGLESTEP 4 /* restore singlestep on return to user
	99	* mode
	100	*/
	101	#define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */
	102	#define TIF_RESTORE_SIGMASK 9
	103	#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling * TIF_NEED_RESCHED
	104	*/
	105	#define TIF_MEMDIE 17
	106
	107	#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
	108	#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
	109	#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
	110	#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
	111	#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
88ef7f3f JB	112	#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
	113
	114
	115	/* Work to do when returning from interrupt/exception */
	116	/* For OpenRISC, this is anything in the LSW other than syscall trace */
	117	#define _TIF_WORK_MASK (0xff & ~(_TIF_SYSCALL_TRACE\|_TIF_SINGLESTEP))
	118
	119	#endif /* __KERNEL__ */
	120
	121	#endif /* _ASM_THREAD_INFO_H */