nios2: Miscellaneous header files
This patch introduces a few nios2-specific header files. Signed-off-by: Ley Foon Tan <lftan@altera.com>
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Ley Foon Tan
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/*
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* Copyright (C) 2004 Microtronix Datacom Ltd.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_NIOS2_CMPXCHG_H
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#define _ASM_NIOS2_CMPXCHG_H
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#include <linux/irqflags.h>
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#define xchg(ptr, x) \
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((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
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struct __xchg_dummy { unsigned long a[100]; };
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#define __xg(x) ((volatile struct __xchg_dummy *)(x))
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static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
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int size)
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{
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unsigned long tmp, flags;
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local_irq_save(flags);
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switch (size) {
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case 1:
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__asm__ __volatile__(
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"ldb %0, %2\n"
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"stb %1, %2\n"
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: "=&r" (tmp)
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: "r" (x), "m" (*__xg(ptr))
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: "memory");
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break;
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case 2:
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__asm__ __volatile__(
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"ldh %0, %2\n"
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"sth %1, %2\n"
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: "=&r" (tmp)
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: "r" (x), "m" (*__xg(ptr))
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: "memory");
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break;
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case 4:
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__asm__ __volatile__(
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"ldw %0, %2\n"
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"stw %1, %2\n"
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: "=&r" (tmp)
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: "r" (x), "m" (*__xg(ptr))
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: "memory");
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break;
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}
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local_irq_restore(flags);
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return tmp;
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}
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#include <asm-generic/cmpxchg.h>
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#include <asm-generic/cmpxchg-local.h>
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#endif /* _ASM_NIOS2_CMPXCHG_H */
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/*
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* Copyright (C) 2009 Thomas Chou <thomas@wytron.com.tw>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*/
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#ifndef _ASM_NIOS2_LINKAGE_H
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#define _ASM_NIOS2_LINKAGE_H
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/* This file is required by include/linux/linkage.h */
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#define __ALIGN .align 4
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#define __ALIGN_STR ".align 4"
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#endif
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#include <asm-generic/mutex-dec.h>
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/*
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* Copyright (C) 2009 Thomas Chou <thomas@wytron.com.tw>
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* Copyright (C) 2004 Microtronix Datacom Ltd
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef _ASM_NIOS2_BYTEORDER_H
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#define _ASM_NIOS2_BYTEORDER_H
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#include <linux/byteorder/little_endian.h>
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#endif
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/*
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* Copyright (C) 2012 Tobias Klauser <tklauser@distanz.ch>
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* Copyright (C) 2011 Pyramid Technical Consultants, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file COPYING in the main directory of this
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* archive for more details.
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*/
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#ifndef _ASM_NIOS2_SWAB_H
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#define _ASM_NIOS2_SWAB_H
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#include <linux/types.h>
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#include <asm-generic/swab.h>
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#ifdef CONFIG_NIOS2_CI_SWAB_SUPPORT
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#ifdef __GNUC__
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#define __nios2_swab(x) \
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__builtin_custom_ini(CONFIG_NIOS2_CI_SWAB_NO, (x))
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static inline __attribute__((const)) __u16 __arch_swab16(__u16 x)
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{
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return (__u16) __nios2_swab(((__u32) x) << 16);
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}
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#define __arch_swab16 __arch_swab16
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static inline __attribute__((const)) __u32 __arch_swab32(__u32 x)
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{
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return (__u32) __nios2_swab(x);
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}
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#define __arch_swab32 __arch_swab32
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#endif /* __GNUC__ */
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#endif /* CONFIG_NIOS2_CI_SWAB_SUPPORT */
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#endif /* _ASM_NIOS2_SWAB_H */
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