iomap_copy.c

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/*
 * Copyright 2006 PathScale, Inc.  All Rights Reserved.
 *
 * This file is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License
 * as published by the Free Software Foundation.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#include <linux/export.h>
#include <linux/io.h>

void __attribute__((weak)) __iowrite32_copy(void __iomem *to,
                        const void *from,
                        size_t count)
{
    u32 __iomem *dst = to;
    const u32 *src = from;
    const u32 *end = src + count;

    while (src < end)
        __raw_writel(*src++, dst++);
}
EXPORT_SYMBOL_GPL(__iowrite32_copy);

void __attribute__((weak)) __iowrite64_copy(void __iomem *to,
                        const void *from,
                        size_t count)
{
#ifdef CONFIG_64BIT
    u64 __iomem *dst = to;
    const u64 *src = from;
    const u64 *end = src + count;

    while (src < end)
        __raw_writeq(*src++, dst++);
#else
    __iowrite32_copy(to, from, count * 2);
#endif
}

EXPORT_SYMBOL_GPL(__iowrite64_copy);