Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * 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/module.h>

#include <linux/io.h>

/**

 * __iowrite32_copy - copy data to MMIO space, in 32-bit units

 * @to: destination, in MMIO space (must be 32-bit aligned)

 * @from: source (must be 32-bit aligned)

 * @count: number of 32-bit quantities to copy

 *

 * Copy data from kernel space to MMIO space, in units of 32 bits at a

 * time.  Order of access is not guaranteed, nor is a memory barrier

 * performed afterwards.

 */

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);

/**

 * __iowrite64_copy - copy data to MMIO space, in 64-bit or 32-bit units

 * @to: destination, in MMIO space (must be 64-bit aligned)

 * @from: source (must be 64-bit aligned)

 * @count: number of 64-bit quantities to copy

 *

 * Copy data from kernel space to MMIO space, in units of 32 or 64 bits at a

 * time.  Order of access is not guaranteed, nor is a memory barrier

 * performed afterwards.

 */

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);