/*
   * 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>
  
  /**
   * __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);