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

/*
 * Copyright (C) 2006 Atmark Techno, Inc.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License. See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#ifndef _ASM_MICROBLAZE_THREAD_INFO_H

#define _ASM_MICROBLAZE_THREAD_INFO_H

#ifdef __KERNEL__

/* we have 8k stack */

#define THREAD_SHIFT		13

#define THREAD_SIZE		(1 << THREAD_SHIFT)

#define THREAD_SIZE_ORDER	1

#ifndef __ASSEMBLY__
# include <linux/types.h>
# 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 cpu_context {
	
__u32	r1; /* stack pointer */
	
__u32	r2;
	/* dedicated registers */
	
__u32	r13;
	
__u32	r14;
	
__u32	r15;
	
__u32	r16;
	
__u32	r17;
	
__u32	r18;
	/* non-volatile registers */
	
__u32	r19;
	
__u32	r20;
	
__u32	r21;
	
__u32	r22;
	
__u32	r23;
	
__u32	r24;
	
__u32	r25;
	
__u32	r26;
	
__u32	r27;
	
__u32	r28;
	
__u32	r29;
	
__u32	r30;
	/* r31 is used as current task pointer */
	/* special purpose registers */
	
__u32	msr;
	
__u32	ear;
	
__u32	esr;
	
__u32	fsr;
};

typedef struct {
	
unsigned long seg;

} mm_segment_t;


struct thread_info {
	
struct task_struct	*task; /* main task structure */
	
unsigned long		flags; /* low level flags */
	
unsigned long		status; /* thread-synchronous flags */
	
__u32			cpu; /* current CPU */
	
__s32			preempt_count; /* 0 => preemptable,< 0 => BUG*/
	
mm_segment_t		addr_limit; /* thread address space */

	
struct cpu_context	cpu_context;
};

/*
 * macros/functions for gaining access to the thread information structure
 */

#define INIT_THREAD_INFO(tsk)			\
{                                               \
        .task           = &tsk,                 \
        .flags          = 0,                    \
        .cpu            = 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)
{
	register unsigned long sp asm("r1");

	return (struct thread_info *)(sp & ~(THREAD_SIZE-1));
}

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/* thread information allocation */
#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 */
/* restore singlestep on return to user mode */

#define TIF_SINGLESTEP		4

#define TIF_MEMDIE		6	
/* is terminating due to OOM killer */

#define TIF_SYSCALL_AUDIT	9       
/* syscall auditing active */

#define TIF_SECCOMP		10      
/* secure computing */

/* true if poll_idle() is polling TIF_NEED_RESCHED */

#define TIF_POLLING_NRFLAG	16


#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)

#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)

#define _TIF_SECCOMP		(1 << TIF_SECCOMP)

/* work to do in syscall trace */

#define _TIF_WORK_SYSCALL_MASK  (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
                                 _TIF_SYSCALL_AUDIT | _TIF_SECCOMP)

/* work to do on interrupt/exception return */

#define _TIF_WORK_MASK		0x0000FFFE

/* work to do on any return to u-space */

#define _TIF_ALLWORK_MASK	0x0000FFFF

/*
 * Thread-synchronous status.
 *
 * This is different from the flags in that nobody else
 * ever touches our thread-synchronous status, so we don't
 * have to worry about atomic accesses.
 */
/* FPU was used by this task this quantum (SMP) */

#define TS_USEDFPU		0x0001

#endif /* __KERNEL__ */
#endif /* _ASM_MICROBLAZE_THREAD_INFO_H */
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Directory: arch/microblaze/include/asm

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