Release 4.14 arch/unicore32/include/asm/thread_info.h

/*
 * linux/arch/unicore32/include/asm/thread_info.h
 *
 * Code specific to PKUnity SoC and UniCore ISA
 *
 * Copyright (C) 2001-2010 GUAN Xue-tao
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __UNICORE_THREAD_INFO_H__

#define __UNICORE_THREAD_INFO_H__

#ifdef __KERNEL__

#include <linux/compiler.h>
#include <asm/fpstate.h>


#define THREAD_SIZE_ORDER	1

#define THREAD_SIZE		8192

#define THREAD_START_SP		(THREAD_SIZE - 8)

#ifndef __ASSEMBLY__

struct task_struct;

#include <asm/types.h>

typedef struct {
	
unsigned long seg;

} mm_segment_t;


struct cpu_context_save {
	
__u32	r4;
	
__u32	r5;
	
__u32	r6;
	
__u32	r7;
	
__u32	r8;
	
__u32	r9;
	
__u32	r10;
	
__u32	r11;
	
__u32	r12;
	
__u32	r13;
	
__u32	r14;
	
__u32	r15;
	
__u32	r16;
	
__u32	r17;
	
__u32	r18;
	
__u32	r19;
	
__u32	r20;
	
__u32	r21;
	
__u32	r22;
	
__u32	r23;
	
__u32	r24;
	
__u32	r25;
	
__u32	r26;
	
__u32	fp;
	
__u32	sp;
	
__u32	pc;
};

/*
 * low level task data that entry.S needs immediate access to.
 * __switch_to() assumes cpu_context follows immediately after cpu_domain.
 */

struct thread_info {
	
unsigned long		flags;		/* low level flags */
	
int			preempt_count;	/* 0 => preemptable */
						/* <0 => bug */
	
mm_segment_t		addr_limit;	/* address limit */
	
struct task_struct	*task;		/* main task structure */
	
__u32			cpu;		/* cpu */
	
struct cpu_context_save	cpu_context;	/* cpu context */
	
__u32			syscall;	/* syscall number */
	
__u8			used_cp[16];	/* thread used copro */
#ifdef CONFIG_UNICORE_FPU_F64
	
struct fp_state		fpstate __attribute__((aligned(8)));
#endif
};


#define INIT_THREAD_INFO(tsk)						\
{                                                                       \
        .task           = &tsk,                                         \
        .flags          = 0,                                            \
        .preempt_count  = INIT_PREEMPT_COUNT,                           \
        .addr_limit     = KERNEL_DS,                                    \
}


#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
 */
static inline struct thread_info *current_thread_info(void) __attribute_const__;



static inline struct thread_info *current_thread_info(void)
{
	register unsigned long sp asm ("sp");
	return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
}

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#define thread_saved_pc(tsk)	\
	((unsigned long)(task_thread_info(tsk)->cpu_context.pc))

#define thread_saved_sp(tsk)	\
	((unsigned long)(task_thread_info(tsk)->cpu_context.sp))

#define thread_saved_fp(tsk)	\
	((unsigned long)(task_thread_info(tsk)->cpu_context.fp))

#endif

/*
 * thread information flags:
 *  TIF_SYSCALL_TRACE   - syscall trace active
 *  TIF_SIGPENDING      - signal pending
 *  TIF_NEED_RESCHED    - rescheduling necessary
 *  TIF_NOTIFY_RESUME   - callback before returning to user
 */

#define TIF_SIGPENDING		0

#define TIF_NEED_RESCHED	1

#define TIF_NOTIFY_RESUME	2	
/* callback before returning to user */

#define TIF_SYSCALL_TRACE	8

#define TIF_MEMDIE		18

#define TIF_RESTORE_SIGMASK	20


#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)

#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)

#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)

#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)

/*
 * Change these and you break ASM code in entry-common.S
 */

#define _TIF_WORK_MASK \
	(_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_NOTIFY_RESUME)

#endif /* __KERNEL__ */
#endif /* __UNICORE_THREAD_INFO_H__ */
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Directory: arch/unicore32/include/asm

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