Release 4.14 arch/nios2/include/asm/processor.h

/*
 * Copyright (C) 2013 Altera Corporation
 * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
 * Copyright (C) 2004 Microtronix Datacom Ltd
 * Copyright (C) 2001 Ken Hill (khill@microtronix.com)
 *                    Vic Phillips (vic@microtronix.com)
 *
 * based on SPARC asm/processor_32.h which is:
 *
 * Copyright (C) 1994 David S. Miller
 *
 * 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_NIOS2_PROCESSOR_H

#define _ASM_NIOS2_PROCESSOR_H

#include <asm/ptrace.h>
#include <asm/registers.h>
#include <asm/page.h>


#define NIOS2_FLAG_KTHREAD	0x00000001	
/* task is a kernel thread */


#define NIOS2_OP_NOP		0x1883a

#define NIOS2_OP_BREAK		0x3da03a

#ifdef __KERNEL__


#define STACK_TOP	TASK_SIZE

#define STACK_TOP_MAX	STACK_TOP

#endif /* __KERNEL__ */

/* Kuser helpers is mapped to this user space address */

#define KUSER_BASE		0x1000

#define KUSER_SIZE		(PAGE_SIZE)
#ifndef __ASSEMBLY__

/*
 * Default implementation of macro that returns current
 * instruction pointer ("program counter").
 */

#define current_text_addr() ({ __label__ _l; _l: &&_l; })


# define TASK_SIZE		0x7FFF0000UL

# define TASK_UNMAPPED_BASE	(PAGE_ALIGN(TASK_SIZE / 3))

/* The Nios processor specific thread struct. */

struct thread_struct {
	
struct pt_regs *kregs;

	/* Context switch saved kernel state. */
	
unsigned long ksp;
	
unsigned long kpsr;
};


#define INIT_MMAP \
	{ &init_mm, (0), (0), __pgprot(0x0), VM_READ | VM_WRITE | VM_EXEC }


# define INIT_THREAD {                       \
        .kregs  = NULL,                 \
        .ksp    = 0,                    \
        .kpsr   = 0,                    \
}

extern void start_thread(struct pt_regs *regs, unsigned long pc,
			unsigned long sp);

struct task_struct;

/* Free all resources held by a thread. */


static inline void release_thread(struct task_struct *dead_task)
{
}

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extern unsigned long get_wchan(struct task_struct *p);


#define task_pt_regs(p) \
	((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)

/* Used by procfs */

#define KSTK_EIP(tsk)	((tsk)->thread.kregs->ea)

#define KSTK_ESP(tsk)	((tsk)->thread.kregs->sp)


#define cpu_relax()	barrier()

#endif /* __ASSEMBLY__ */

#endif /* _ASM_NIOS2_PROCESSOR_H */
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Directory: arch/nios2/include/asm

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