nios2: Miscellaneous header files

/*

 * Copyright (C) 2004 Microtronix Datacom Ltd.

 *

 * 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_CMPXCHG_H

#define _ASM_NIOS2_CMPXCHG_H

#include <linux/irqflags.h>

#define xchg(ptr, x)	\

	((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))

struct __xchg_dummy { unsigned long a[100]; };

#define __xg(x)		((volatile struct __xchg_dummy *)(x))

static inline unsigned long __xchg(unsigned long x, volatile void *ptr,

					int size)

{

	unsigned long tmp, flags;

	local_irq_save(flags);

	switch (size) {

	case 1:

		__asm__ __volatile__(

			"ldb	%0, %2\n"

			"stb	%1, %2\n"

			: "=&r" (tmp)

			: "r" (x), "m" (*__xg(ptr))

			: "memory");

		break;

	case 2:

		__asm__ __volatile__(

			"ldh	%0, %2\n"

			"sth	%1, %2\n"

			: "=&r" (tmp)

			: "r" (x), "m" (*__xg(ptr))

			: "memory");

		break;

	case 4:

		__asm__ __volatile__(

			"ldw	%0, %2\n"

			"stw	%1, %2\n"

			: "=&r" (tmp)

			: "r" (x), "m" (*__xg(ptr))

			: "memory");

		break;

	}

	local_irq_restore(flags);

	return tmp;

}

#include <asm-generic/cmpxchg.h>

#include <asm-generic/cmpxchg-local.h>

#endif /* _ASM_NIOS2_CMPXCHG_H */

/*

 * Copyright (C) 2009 Thomas Chou <thomas@wytron.com.tw>

 *

 * All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or

 * NON INFRINGEMENT.  See the GNU General Public License for more

 * details.

 */

#ifndef _ASM_NIOS2_LINKAGE_H

#define _ASM_NIOS2_LINKAGE_H

/* This file is required by include/linux/linkage.h */

#define __ALIGN .align 4

#define __ALIGN_STR ".align 4"

#endif

#include <asm-generic/mutex-dec.h>

/*

 * Copyright (C) 2009   Thomas Chou <thomas@wytron.com.tw>

 * Copyright (C) 2004   Microtronix Datacom Ltd

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */

#ifndef _ASM_NIOS2_BYTEORDER_H

#define _ASM_NIOS2_BYTEORDER_H

#include <linux/byteorder/little_endian.h>

#endif

/*

 * Copyright (C) 2012 Tobias Klauser <tklauser@distanz.ch>

 * Copyright (C) 2011 Pyramid Technical Consultants, 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_NIOS2_SWAB_H

#define _ASM_NIOS2_SWAB_H

#include <linux/types.h>

#include <asm-generic/swab.h>

#ifdef CONFIG_NIOS2_CI_SWAB_SUPPORT

#ifdef __GNUC__

#define __nios2_swab(x)		\

	__builtin_custom_ini(CONFIG_NIOS2_CI_SWAB_NO, (x))

static inline __attribute__((const)) __u16 __arch_swab16(__u16 x)

{

	return (__u16) __nios2_swab(((__u32) x) << 16);

}

#define __arch_swab16 __arch_swab16

static inline __attribute__((const)) __u32 __arch_swab32(__u32 x)

{

	return (__u32) __nios2_swab(x);

}

#define __arch_swab32 __arch_swab32

#endif /* __GNUC__ */

#endif /* CONFIG_NIOS2_CI_SWAB_SUPPORT */

#endif /* _ASM_NIOS2_SWAB_H */